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- /******************************************************************************
- *
- * Copyright(c) 2003 - 2009 Intel Corporation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
- *
- * The full GNU General Public License is included in this distribution in the
- * file called LICENSE.
- *
- * Contact Information:
- * Intel Linux Wireless <ilw@linux.intel.com>
- * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
- *
- *****************************************************************************/
- #include <linux/kernel.h>
- #include <linux/module.h>
- #include <linux/init.h>
- #include <linux/pci.h>
- #include <linux/dma-mapping.h>
- #include <linux/delay.h>
- #include <linux/skbuff.h>
- #include <linux/netdevice.h>
- #include <linux/wireless.h>
- #include <net/mac80211.h>
- #include <linux/etherdevice.h>
- #include <asm/unaligned.h>
- #include "iwl-eeprom.h"
- #include "iwl-dev.h"
- #include "iwl-core.h"
- #include "iwl-io.h"
- #include "iwl-helpers.h"
- #include "iwl-calib.h"
- #include "iwl-sta.h"
- static int iwl4965_send_tx_power(struct iwl_priv *priv);
- static int iwl4965_hw_get_temperature(const struct iwl_priv *priv);
- /* Highest firmware API version supported */
- #define IWL4965_UCODE_API_MAX 2
- /* Lowest firmware API version supported */
- #define IWL4965_UCODE_API_MIN 2
- #define IWL4965_FW_PRE "iwlwifi-4965-"
- #define _IWL4965_MODULE_FIRMWARE(api) IWL4965_FW_PRE #api ".ucode"
- #define IWL4965_MODULE_FIRMWARE(api) _IWL4965_MODULE_FIRMWARE(api)
- /* module parameters */
- static struct iwl_mod_params iwl4965_mod_params = {
- .num_of_queues = IWL49_NUM_QUEUES,
- .num_of_ampdu_queues = IWL49_NUM_AMPDU_QUEUES,
- .amsdu_size_8K = 1,
- .restart_fw = 1,
- /* the rest are 0 by default */
- };
- /* check contents of special bootstrap uCode SRAM */
- static int iwl4965_verify_bsm(struct iwl_priv *priv)
- {
- __le32 *image = priv->ucode_boot.v_addr;
- u32 len = priv->ucode_boot.len;
- u32 reg;
- u32 val;
- IWL_DEBUG_INFO(priv, "Begin verify bsm\n");
- /* verify BSM SRAM contents */
- val = iwl_read_prph(priv, BSM_WR_DWCOUNT_REG);
- for (reg = BSM_SRAM_LOWER_BOUND;
- reg < BSM_SRAM_LOWER_BOUND + len;
- reg += sizeof(u32), image++) {
- val = iwl_read_prph(priv, reg);
- if (val != le32_to_cpu(*image)) {
- IWL_ERR(priv, "BSM uCode verification failed at "
- "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
- BSM_SRAM_LOWER_BOUND,
- reg - BSM_SRAM_LOWER_BOUND, len,
- val, le32_to_cpu(*image));
- return -EIO;
- }
- }
- IWL_DEBUG_INFO(priv, "BSM bootstrap uCode image OK\n");
- return 0;
- }
- /**
- * iwl4965_load_bsm - Load bootstrap instructions
- *
- * BSM operation:
- *
- * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
- * in special SRAM that does not power down during RFKILL. When powering back
- * up after power-saving sleeps (or during initial uCode load), the BSM loads
- * the bootstrap program into the on-board processor, and starts it.
- *
- * The bootstrap program loads (via DMA) instructions and data for a new
- * program from host DRAM locations indicated by the host driver in the
- * BSM_DRAM_* registers. Once the new program is loaded, it starts
- * automatically.
- *
- * When initializing the NIC, the host driver points the BSM to the
- * "initialize" uCode image. This uCode sets up some internal data, then
- * notifies host via "initialize alive" that it is complete.
- *
- * The host then replaces the BSM_DRAM_* pointer values to point to the
- * normal runtime uCode instructions and a backup uCode data cache buffer
- * (filled initially with starting data values for the on-board processor),
- * then triggers the "initialize" uCode to load and launch the runtime uCode,
- * which begins normal operation.
- *
- * When doing a power-save shutdown, runtime uCode saves data SRAM into
- * the backup data cache in DRAM before SRAM is powered down.
- *
- * When powering back up, the BSM loads the bootstrap program. This reloads
- * the runtime uCode instructions and the backup data cache into SRAM,
- * and re-launches the runtime uCode from where it left off.
- */
- static int iwl4965_load_bsm(struct iwl_priv *priv)
- {
- __le32 *image = priv->ucode_boot.v_addr;
- u32 len = priv->ucode_boot.len;
- dma_addr_t pinst;
- dma_addr_t pdata;
- u32 inst_len;
- u32 data_len;
- int i;
- u32 done;
- u32 reg_offset;
- int ret;
- IWL_DEBUG_INFO(priv, "Begin load bsm\n");
- priv->ucode_type = UCODE_RT;
- /* make sure bootstrap program is no larger than BSM's SRAM size */
- if (len > IWL49_MAX_BSM_SIZE)
- return -EINVAL;
- /* Tell bootstrap uCode where to find the "Initialize" uCode
- * in host DRAM ... host DRAM physical address bits 35:4 for 4965.
- * NOTE: iwl_init_alive_start() will replace these values,
- * after the "initialize" uCode has run, to point to
- * runtime/protocol instructions and backup data cache.
- */
- pinst = priv->ucode_init.p_addr >> 4;
- pdata = priv->ucode_init_data.p_addr >> 4;
- inst_len = priv->ucode_init.len;
- data_len = priv->ucode_init_data.len;
- ret = iwl_grab_nic_access(priv);
- if (ret)
- return ret;
- iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
- iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
- iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
- iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
- /* Fill BSM memory with bootstrap instructions */
- for (reg_offset = BSM_SRAM_LOWER_BOUND;
- reg_offset < BSM_SRAM_LOWER_BOUND + len;
- reg_offset += sizeof(u32), image++)
- _iwl_write_prph(priv, reg_offset, le32_to_cpu(*image));
- ret = iwl4965_verify_bsm(priv);
- if (ret) {
- iwl_release_nic_access(priv);
- return ret;
- }
- /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
- iwl_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
- iwl_write_prph(priv, BSM_WR_MEM_DST_REG, IWL49_RTC_INST_LOWER_BOUND);
- iwl_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
- /* Load bootstrap code into instruction SRAM now,
- * to prepare to load "initialize" uCode */
- iwl_write_prph(priv, BSM_WR_CTRL_REG, BSM_WR_CTRL_REG_BIT_START);
- /* Wait for load of bootstrap uCode to finish */
- for (i = 0; i < 100; i++) {
- done = iwl_read_prph(priv, BSM_WR_CTRL_REG);
- if (!(done & BSM_WR_CTRL_REG_BIT_START))
- break;
- udelay(10);
- }
- if (i < 100)
- IWL_DEBUG_INFO(priv, "BSM write complete, poll %d iterations\n", i);
- else {
- IWL_ERR(priv, "BSM write did not complete!\n");
- return -EIO;
- }
- /* Enable future boot loads whenever power management unit triggers it
- * (e.g. when powering back up after power-save shutdown) */
- iwl_write_prph(priv, BSM_WR_CTRL_REG, BSM_WR_CTRL_REG_BIT_START_EN);
- iwl_release_nic_access(priv);
- return 0;
- }
- /**
- * iwl4965_set_ucode_ptrs - Set uCode address location
- *
- * Tell initialization uCode where to find runtime uCode.
- *
- * BSM registers initially contain pointers to initialization uCode.
- * We need to replace them to load runtime uCode inst and data,
- * and to save runtime data when powering down.
- */
- static int iwl4965_set_ucode_ptrs(struct iwl_priv *priv)
- {
- dma_addr_t pinst;
- dma_addr_t pdata;
- unsigned long flags;
- int ret = 0;
- /* bits 35:4 for 4965 */
- pinst = priv->ucode_code.p_addr >> 4;
- pdata = priv->ucode_data_backup.p_addr >> 4;
- spin_lock_irqsave(&priv->lock, flags);
- ret = iwl_grab_nic_access(priv);
- if (ret) {
- spin_unlock_irqrestore(&priv->lock, flags);
- return ret;
- }
- /* Tell bootstrap uCode where to find image to load */
- iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
- iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
- iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
- priv->ucode_data.len);
- /* Inst byte count must be last to set up, bit 31 signals uCode
- * that all new ptr/size info is in place */
- iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
- priv->ucode_code.len | BSM_DRAM_INST_LOAD);
- iwl_release_nic_access(priv);
- spin_unlock_irqrestore(&priv->lock, flags);
- IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
- return ret;
- }
- /**
- * iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
- *
- * Called after REPLY_ALIVE notification received from "initialize" uCode.
- *
- * The 4965 "initialize" ALIVE reply contains calibration data for:
- * Voltage, temperature, and MIMO tx gain correction, now stored in priv
- * (3945 does not contain this data).
- *
- * Tell "initialize" uCode to go ahead and load the runtime uCode.
- */
- static void iwl4965_init_alive_start(struct iwl_priv *priv)
- {
- /* Check alive response for "valid" sign from uCode */
- if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
- /* We had an error bringing up the hardware, so take it
- * all the way back down so we can try again */
- IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
- goto restart;
- }
- /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
- * This is a paranoid check, because we would not have gotten the
- * "initialize" alive if code weren't properly loaded. */
- if (iwl_verify_ucode(priv)) {
- /* Runtime instruction load was bad;
- * take it all the way back down so we can try again */
- IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
- goto restart;
- }
- /* Calculate temperature */
- priv->temperature = iwl4965_hw_get_temperature(priv);
- /* Send pointers to protocol/runtime uCode image ... init code will
- * load and launch runtime uCode, which will send us another "Alive"
- * notification. */
- IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
- if (iwl4965_set_ucode_ptrs(priv)) {
- /* Runtime instruction load won't happen;
- * take it all the way back down so we can try again */
- IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
- goto restart;
- }
- return;
- restart:
- queue_work(priv->workqueue, &priv->restart);
- }
- static int is_fat_channel(__le32 rxon_flags)
- {
- return (rxon_flags & RXON_FLG_CHANNEL_MODE_PURE_40_MSK) ||
- (rxon_flags & RXON_FLG_CHANNEL_MODE_MIXED_MSK);
- }
- /*
- * EEPROM handlers
- */
- static u16 iwl4965_eeprom_calib_version(struct iwl_priv *priv)
- {
- return iwl_eeprom_query16(priv, EEPROM_4965_CALIB_VERSION_OFFSET);
- }
- /*
- * Activate/Deactivate Tx DMA/FIFO channels according tx fifos mask
- * must be called under priv->lock and mac access
- */
- static void iwl4965_txq_set_sched(struct iwl_priv *priv, u32 mask)
- {
- iwl_write_prph(priv, IWL49_SCD_TXFACT, mask);
- }
- static int iwl4965_apm_init(struct iwl_priv *priv)
- {
- int ret = 0;
- iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
- CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
- /* disable L0s without affecting L1 :don't wait for ICH L0s bug W/A) */
- iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
- CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
- /* set "initialization complete" bit to move adapter
- * D0U* --> D0A* state */
- iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
- /* wait for clock stabilization */
- ret = iwl_poll_direct_bit(priv, CSR_GP_CNTRL,
- CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
- if (ret < 0) {
- IWL_DEBUG_INFO(priv, "Failed to init the card\n");
- goto out;
- }
- ret = iwl_grab_nic_access(priv);
- if (ret)
- goto out;
- /* enable DMA */
- iwl_write_prph(priv, APMG_CLK_CTRL_REG, APMG_CLK_VAL_DMA_CLK_RQT |
- APMG_CLK_VAL_BSM_CLK_RQT);
- udelay(20);
- /* disable L1-Active */
- iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
- APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
- iwl_release_nic_access(priv);
- out:
- return ret;
- }
- static void iwl4965_nic_config(struct iwl_priv *priv)
- {
- unsigned long flags;
- u16 radio_cfg;
- u16 lctl;
- spin_lock_irqsave(&priv->lock, flags);
- lctl = iwl_pcie_link_ctl(priv);
- /* HW bug W/A - negligible power consumption */
- /* L1-ASPM is enabled by BIOS */
- if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) == PCI_CFG_LINK_CTRL_VAL_L1_EN)
- /* L1-ASPM enabled: disable L0S */
- iwl_set_bit(priv, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED);
- else
- /* L1-ASPM disabled: enable L0S */
- iwl_clear_bit(priv, CSR_GIO_REG, CSR_GIO_REG_VAL_L0S_ENABLED);
- radio_cfg = iwl_eeprom_query16(priv, EEPROM_RADIO_CONFIG);
- /* write radio config values to register */
- if (EEPROM_RF_CFG_TYPE_MSK(radio_cfg) == EEPROM_4965_RF_CFG_TYPE_MAX)
- iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
- EEPROM_RF_CFG_TYPE_MSK(radio_cfg) |
- EEPROM_RF_CFG_STEP_MSK(radio_cfg) |
- EEPROM_RF_CFG_DASH_MSK(radio_cfg));
- /* set CSR_HW_CONFIG_REG for uCode use */
- iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
- CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
- CSR_HW_IF_CONFIG_REG_BIT_MAC_SI);
- priv->calib_info = (struct iwl_eeprom_calib_info *)
- iwl_eeprom_query_addr(priv, EEPROM_4965_CALIB_TXPOWER_OFFSET);
- spin_unlock_irqrestore(&priv->lock, flags);
- }
- static int iwl4965_apm_stop_master(struct iwl_priv *priv)
- {
- unsigned long flags;
- spin_lock_irqsave(&priv->lock, flags);
- /* set stop master bit */
- iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
- iwl_poll_direct_bit(priv, CSR_RESET,
- CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
- spin_unlock_irqrestore(&priv->lock, flags);
- IWL_DEBUG_INFO(priv, "stop master\n");
- return 0;
- }
- static void iwl4965_apm_stop(struct iwl_priv *priv)
- {
- unsigned long flags;
- iwl4965_apm_stop_master(priv);
- spin_lock_irqsave(&priv->lock, flags);
- iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
- udelay(10);
- /* clear "init complete" move adapter D0A* --> D0U state */
- iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
- spin_unlock_irqrestore(&priv->lock, flags);
- }
- static int iwl4965_apm_reset(struct iwl_priv *priv)
- {
- int ret = 0;
- unsigned long flags;
- iwl4965_apm_stop_master(priv);
- spin_lock_irqsave(&priv->lock, flags);
- iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
- udelay(10);
- /* FIXME: put here L1A -L0S w/a */
- iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
- ret = iwl_poll_direct_bit(priv, CSR_GP_CNTRL,
- CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
- if (ret < 0)
- goto out;
- udelay(10);
- ret = iwl_grab_nic_access(priv);
- if (ret)
- goto out;
- /* Enable DMA and BSM Clock */
- iwl_write_prph(priv, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT |
- APMG_CLK_VAL_BSM_CLK_RQT);
- udelay(10);
- /* disable L1A */
- iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
- APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
- iwl_release_nic_access(priv);
- clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
- wake_up_interruptible(&priv->wait_command_queue);
- out:
- spin_unlock_irqrestore(&priv->lock, flags);
- return ret;
- }
- /* Reset differential Rx gains in NIC to prepare for chain noise calibration.
- * Called after every association, but this runs only once!
- * ... once chain noise is calibrated the first time, it's good forever. */
- static void iwl4965_chain_noise_reset(struct iwl_priv *priv)
- {
- struct iwl_chain_noise_data *data = &(priv->chain_noise_data);
- if ((data->state == IWL_CHAIN_NOISE_ALIVE) && iwl_is_associated(priv)) {
- struct iwl_calib_diff_gain_cmd cmd;
- memset(&cmd, 0, sizeof(cmd));
- cmd.hdr.op_code = IWL_PHY_CALIBRATE_DIFF_GAIN_CMD;
- cmd.diff_gain_a = 0;
- cmd.diff_gain_b = 0;
- cmd.diff_gain_c = 0;
- if (iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
- sizeof(cmd), &cmd))
- IWL_ERR(priv,
- "Could not send REPLY_PHY_CALIBRATION_CMD\n");
- data->state = IWL_CHAIN_NOISE_ACCUMULATE;
- IWL_DEBUG_CALIB(priv, "Run chain_noise_calibrate\n");
- }
- }
- static void iwl4965_gain_computation(struct iwl_priv *priv,
- u32 *average_noise,
- u16 min_average_noise_antenna_i,
- u32 min_average_noise)
- {
- int i, ret;
- struct iwl_chain_noise_data *data = &priv->chain_noise_data;
- data->delta_gain_code[min_average_noise_antenna_i] = 0;
- for (i = 0; i < NUM_RX_CHAINS; i++) {
- s32 delta_g = 0;
- if (!(data->disconn_array[i]) &&
- (data->delta_gain_code[i] ==
- CHAIN_NOISE_DELTA_GAIN_INIT_VAL)) {
- delta_g = average_noise[i] - min_average_noise;
- data->delta_gain_code[i] = (u8)((delta_g * 10) / 15);
- data->delta_gain_code[i] =
- min(data->delta_gain_code[i],
- (u8) CHAIN_NOISE_MAX_DELTA_GAIN_CODE);
- data->delta_gain_code[i] =
- (data->delta_gain_code[i] | (1 << 2));
- } else {
- data->delta_gain_code[i] = 0;
- }
- }
- IWL_DEBUG_CALIB(priv, "delta_gain_codes: a %d b %d c %d\n",
- data->delta_gain_code[0],
- data->delta_gain_code[1],
- data->delta_gain_code[2]);
- /* Differential gain gets sent to uCode only once */
- if (!data->radio_write) {
- struct iwl_calib_diff_gain_cmd cmd;
- data->radio_write = 1;
- memset(&cmd, 0, sizeof(cmd));
- cmd.hdr.op_code = IWL_PHY_CALIBRATE_DIFF_GAIN_CMD;
- cmd.diff_gain_a = data->delta_gain_code[0];
- cmd.diff_gain_b = data->delta_gain_code[1];
- cmd.diff_gain_c = data->delta_gain_code[2];
- ret = iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
- sizeof(cmd), &cmd);
- if (ret)
- IWL_DEBUG_CALIB(priv, "fail sending cmd "
- "REPLY_PHY_CALIBRATION_CMD \n");
- /* TODO we might want recalculate
- * rx_chain in rxon cmd */
- /* Mark so we run this algo only once! */
- data->state = IWL_CHAIN_NOISE_CALIBRATED;
- }
- data->chain_noise_a = 0;
- data->chain_noise_b = 0;
- data->chain_noise_c = 0;
- data->chain_signal_a = 0;
- data->chain_signal_b = 0;
- data->chain_signal_c = 0;
- data->beacon_count = 0;
- }
- static void iwl4965_rts_tx_cmd_flag(struct ieee80211_tx_info *info,
- __le32 *tx_flags)
- {
- if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
- *tx_flags |= TX_CMD_FLG_RTS_MSK;
- *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
- } else if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
- *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
- *tx_flags |= TX_CMD_FLG_CTS_MSK;
- }
- }
- static void iwl4965_bg_txpower_work(struct work_struct *work)
- {
- struct iwl_priv *priv = container_of(work, struct iwl_priv,
- txpower_work);
- /* If a scan happened to start before we got here
- * then just return; the statistics notification will
- * kick off another scheduled work to compensate for
- * any temperature delta we missed here. */
- if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
- test_bit(STATUS_SCANNING, &priv->status))
- return;
- mutex_lock(&priv->mutex);
- /* Regardless of if we are associated, we must reconfigure the
- * TX power since frames can be sent on non-radar channels while
- * not associated */
- iwl4965_send_tx_power(priv);
- /* Update last_temperature to keep is_calib_needed from running
- * when it isn't needed... */
- priv->last_temperature = priv->temperature;
- mutex_unlock(&priv->mutex);
- }
- /*
- * Acquire priv->lock before calling this function !
- */
- static void iwl4965_set_wr_ptrs(struct iwl_priv *priv, int txq_id, u32 index)
- {
- iwl_write_direct32(priv, HBUS_TARG_WRPTR,
- (index & 0xff) | (txq_id << 8));
- iwl_write_prph(priv, IWL49_SCD_QUEUE_RDPTR(txq_id), index);
- }
- /**
- * iwl4965_tx_queue_set_status - (optionally) start Tx/Cmd queue
- * @tx_fifo_id: Tx DMA/FIFO channel (range 0-7) that the queue will feed
- * @scd_retry: (1) Indicates queue will be used in aggregation mode
- *
- * NOTE: Acquire priv->lock before calling this function !
- */
- static void iwl4965_tx_queue_set_status(struct iwl_priv *priv,
- struct iwl_tx_queue *txq,
- int tx_fifo_id, int scd_retry)
- {
- int txq_id = txq->q.id;
- /* Find out whether to activate Tx queue */
- int active = test_bit(txq_id, &priv->txq_ctx_active_msk) ? 1 : 0;
- /* Set up and activate */
- iwl_write_prph(priv, IWL49_SCD_QUEUE_STATUS_BITS(txq_id),
- (active << IWL49_SCD_QUEUE_STTS_REG_POS_ACTIVE) |
- (tx_fifo_id << IWL49_SCD_QUEUE_STTS_REG_POS_TXF) |
- (scd_retry << IWL49_SCD_QUEUE_STTS_REG_POS_WSL) |
- (scd_retry << IWL49_SCD_QUEUE_STTS_REG_POS_SCD_ACK) |
- IWL49_SCD_QUEUE_STTS_REG_MSK);
- txq->sched_retry = scd_retry;
- IWL_DEBUG_INFO(priv, "%s %s Queue %d on AC %d\n",
- active ? "Activate" : "Deactivate",
- scd_retry ? "BA" : "AC", txq_id, tx_fifo_id);
- }
- static const u16 default_queue_to_tx_fifo[] = {
- IWL_TX_FIFO_AC3,
- IWL_TX_FIFO_AC2,
- IWL_TX_FIFO_AC1,
- IWL_TX_FIFO_AC0,
- IWL49_CMD_FIFO_NUM,
- IWL_TX_FIFO_HCCA_1,
- IWL_TX_FIFO_HCCA_2
- };
- static int iwl4965_alive_notify(struct iwl_priv *priv)
- {
- u32 a;
- unsigned long flags;
- int ret;
- int i, chan;
- u32 reg_val;
- spin_lock_irqsave(&priv->lock, flags);
- ret = iwl_grab_nic_access(priv);
- if (ret) {
- spin_unlock_irqrestore(&priv->lock, flags);
- return ret;
- }
- /* Clear 4965's internal Tx Scheduler data base */
- priv->scd_base_addr = iwl_read_prph(priv, IWL49_SCD_SRAM_BASE_ADDR);
- a = priv->scd_base_addr + IWL49_SCD_CONTEXT_DATA_OFFSET;
- for (; a < priv->scd_base_addr + IWL49_SCD_TX_STTS_BITMAP_OFFSET; a += 4)
- iwl_write_targ_mem(priv, a, 0);
- for (; a < priv->scd_base_addr + IWL49_SCD_TRANSLATE_TBL_OFFSET; a += 4)
- iwl_write_targ_mem(priv, a, 0);
- for (; a < sizeof(u16) * priv->hw_params.max_txq_num; a += 4)
- iwl_write_targ_mem(priv, a, 0);
- /* Tel 4965 where to find Tx byte count tables */
- iwl_write_prph(priv, IWL49_SCD_DRAM_BASE_ADDR,
- priv->scd_bc_tbls.dma >> 10);
- /* Enable DMA channel */
- for (chan = 0; chan < FH49_TCSR_CHNL_NUM ; chan++)
- iwl_write_direct32(priv, FH_TCSR_CHNL_TX_CONFIG_REG(chan),
- FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
- FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE);
- /* Update FH chicken bits */
- reg_val = iwl_read_direct32(priv, FH_TX_CHICKEN_BITS_REG);
- iwl_write_direct32(priv, FH_TX_CHICKEN_BITS_REG,
- reg_val | FH_TX_CHICKEN_BITS_SCD_AUTO_RETRY_EN);
- /* Disable chain mode for all queues */
- iwl_write_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, 0);
- /* Initialize each Tx queue (including the command queue) */
- for (i = 0; i < priv->hw_params.max_txq_num; i++) {
- /* TFD circular buffer read/write indexes */
- iwl_write_prph(priv, IWL49_SCD_QUEUE_RDPTR(i), 0);
- iwl_write_direct32(priv, HBUS_TARG_WRPTR, 0 | (i << 8));
- /* Max Tx Window size for Scheduler-ACK mode */
- iwl_write_targ_mem(priv, priv->scd_base_addr +
- IWL49_SCD_CONTEXT_QUEUE_OFFSET(i),
- (SCD_WIN_SIZE <<
- IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
- IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
- /* Frame limit */
- iwl_write_targ_mem(priv, priv->scd_base_addr +
- IWL49_SCD_CONTEXT_QUEUE_OFFSET(i) +
- sizeof(u32),
- (SCD_FRAME_LIMIT <<
- IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
- IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
- }
- iwl_write_prph(priv, IWL49_SCD_INTERRUPT_MASK,
- (1 << priv->hw_params.max_txq_num) - 1);
- /* Activate all Tx DMA/FIFO channels */
- priv->cfg->ops->lib->txq_set_sched(priv, IWL_MASK(0, 6));
- iwl4965_set_wr_ptrs(priv, IWL_CMD_QUEUE_NUM, 0);
- /* Map each Tx/cmd queue to its corresponding fifo */
- for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) {
- int ac = default_queue_to_tx_fifo[i];
- iwl_txq_ctx_activate(priv, i);
- iwl4965_tx_queue_set_status(priv, &priv->txq[i], ac, 0);
- }
- iwl_release_nic_access(priv);
- spin_unlock_irqrestore(&priv->lock, flags);
- return ret;
- }
- static struct iwl_sensitivity_ranges iwl4965_sensitivity = {
- .min_nrg_cck = 97,
- .max_nrg_cck = 0,
- .auto_corr_min_ofdm = 85,
- .auto_corr_min_ofdm_mrc = 170,
- .auto_corr_min_ofdm_x1 = 105,
- .auto_corr_min_ofdm_mrc_x1 = 220,
- .auto_corr_max_ofdm = 120,
- .auto_corr_max_ofdm_mrc = 210,
- .auto_corr_max_ofdm_x1 = 140,
- .auto_corr_max_ofdm_mrc_x1 = 270,
- .auto_corr_min_cck = 125,
- .auto_corr_max_cck = 200,
- .auto_corr_min_cck_mrc = 200,
- .auto_corr_max_cck_mrc = 400,
- .nrg_th_cck = 100,
- .nrg_th_ofdm = 100,
- };
- /**
- * iwl4965_hw_set_hw_params
- *
- * Called when initializing driver
- */
- static int iwl4965_hw_set_hw_params(struct iwl_priv *priv)
- {
- if ((priv->cfg->mod_params->num_of_queues > IWL49_NUM_QUEUES) ||
- (priv->cfg->mod_params->num_of_queues < IWL_MIN_NUM_QUEUES)) {
- IWL_ERR(priv,
- "invalid queues_num, should be between %d and %d\n",
- IWL_MIN_NUM_QUEUES, IWL49_NUM_QUEUES);
- return -EINVAL;
- }
- priv->hw_params.max_txq_num = priv->cfg->mod_params->num_of_queues;
- priv->hw_params.dma_chnl_num = FH49_TCSR_CHNL_NUM;
- priv->hw_params.scd_bc_tbls_size =
- IWL49_NUM_QUEUES * sizeof(struct iwl4965_scd_bc_tbl);
- priv->hw_params.tfd_size = sizeof(struct iwl_tfd);
- priv->hw_params.max_stations = IWL4965_STATION_COUNT;
- priv->hw_params.bcast_sta_id = IWL4965_BROADCAST_ID;
- priv->hw_params.max_data_size = IWL49_RTC_DATA_SIZE;
- priv->hw_params.max_inst_size = IWL49_RTC_INST_SIZE;
- priv->hw_params.max_bsm_size = BSM_SRAM_SIZE;
- priv->hw_params.fat_channel = BIT(IEEE80211_BAND_5GHZ);
- priv->hw_params.rx_wrt_ptr_reg = FH_RSCSR_CHNL0_WPTR;
- priv->hw_params.tx_chains_num = 2;
- priv->hw_params.rx_chains_num = 2;
- priv->hw_params.valid_tx_ant = ANT_A | ANT_B;
- priv->hw_params.valid_rx_ant = ANT_A | ANT_B;
- priv->hw_params.ct_kill_threshold = CELSIUS_TO_KELVIN(CT_KILL_THRESHOLD);
- priv->hw_params.sens = &iwl4965_sensitivity;
- return 0;
- }
- static s32 iwl4965_math_div_round(s32 num, s32 denom, s32 *res)
- {
- s32 sign = 1;
- if (num < 0) {
- sign = -sign;
- num = -num;
- }
- if (denom < 0) {
- sign = -sign;
- denom = -denom;
- }
- *res = 1;
- *res = ((num * 2 + denom) / (denom * 2)) * sign;
- return 1;
- }
- /**
- * iwl4965_get_voltage_compensation - Power supply voltage comp for txpower
- *
- * Determines power supply voltage compensation for txpower calculations.
- * Returns number of 1/2-dB steps to subtract from gain table index,
- * to compensate for difference between power supply voltage during
- * factory measurements, vs. current power supply voltage.
- *
- * Voltage indication is higher for lower voltage.
- * Lower voltage requires more gain (lower gain table index).
- */
- static s32 iwl4965_get_voltage_compensation(s32 eeprom_voltage,
- s32 current_voltage)
- {
- s32 comp = 0;
- if ((TX_POWER_IWL_ILLEGAL_VOLTAGE == eeprom_voltage) ||
- (TX_POWER_IWL_ILLEGAL_VOLTAGE == current_voltage))
- return 0;
- iwl4965_math_div_round(current_voltage - eeprom_voltage,
- TX_POWER_IWL_VOLTAGE_CODES_PER_03V, &comp);
- if (current_voltage > eeprom_voltage)
- comp *= 2;
- if ((comp < -2) || (comp > 2))
- comp = 0;
- return comp;
- }
- static s32 iwl4965_get_tx_atten_grp(u16 channel)
- {
- if (channel >= CALIB_IWL_TX_ATTEN_GR5_FCH &&
- channel <= CALIB_IWL_TX_ATTEN_GR5_LCH)
- return CALIB_CH_GROUP_5;
- if (channel >= CALIB_IWL_TX_ATTEN_GR1_FCH &&
- channel <= CALIB_IWL_TX_ATTEN_GR1_LCH)
- return CALIB_CH_GROUP_1;
- if (channel >= CALIB_IWL_TX_ATTEN_GR2_FCH &&
- channel <= CALIB_IWL_TX_ATTEN_GR2_LCH)
- return CALIB_CH_GROUP_2;
- if (channel >= CALIB_IWL_TX_ATTEN_GR3_FCH &&
- channel <= CALIB_IWL_TX_ATTEN_GR3_LCH)
- return CALIB_CH_GROUP_3;
- if (channel >= CALIB_IWL_TX_ATTEN_GR4_FCH &&
- channel <= CALIB_IWL_TX_ATTEN_GR4_LCH)
- return CALIB_CH_GROUP_4;
- return -1;
- }
- static u32 iwl4965_get_sub_band(const struct iwl_priv *priv, u32 channel)
- {
- s32 b = -1;
- for (b = 0; b < EEPROM_TX_POWER_BANDS; b++) {
- if (priv->calib_info->band_info[b].ch_from == 0)
- continue;
- if ((channel >= priv->calib_info->band_info[b].ch_from)
- && (channel <= priv->calib_info->band_info[b].ch_to))
- break;
- }
- return b;
- }
- static s32 iwl4965_interpolate_value(s32 x, s32 x1, s32 y1, s32 x2, s32 y2)
- {
- s32 val;
- if (x2 == x1)
- return y1;
- else {
- iwl4965_math_div_round((x2 - x) * (y1 - y2), (x2 - x1), &val);
- return val + y2;
- }
- }
- /**
- * iwl4965_interpolate_chan - Interpolate factory measurements for one channel
- *
- * Interpolates factory measurements from the two sample channels within a
- * sub-band, to apply to channel of interest. Interpolation is proportional to
- * differences in channel frequencies, which is proportional to differences
- * in channel number.
- */
- static int iwl4965_interpolate_chan(struct iwl_priv *priv, u32 channel,
- struct iwl_eeprom_calib_ch_info *chan_info)
- {
- s32 s = -1;
- u32 c;
- u32 m;
- const struct iwl_eeprom_calib_measure *m1;
- const struct iwl_eeprom_calib_measure *m2;
- struct iwl_eeprom_calib_measure *omeas;
- u32 ch_i1;
- u32 ch_i2;
- s = iwl4965_get_sub_band(priv, channel);
- if (s >= EEPROM_TX_POWER_BANDS) {
- IWL_ERR(priv, "Tx Power can not find channel %d\n", channel);
- return -1;
- }
- ch_i1 = priv->calib_info->band_info[s].ch1.ch_num;
- ch_i2 = priv->calib_info->band_info[s].ch2.ch_num;
- chan_info->ch_num = (u8) channel;
- IWL_DEBUG_TXPOWER(priv, "channel %d subband %d factory cal ch %d & %d\n",
- channel, s, ch_i1, ch_i2);
- for (c = 0; c < EEPROM_TX_POWER_TX_CHAINS; c++) {
- for (m = 0; m < EEPROM_TX_POWER_MEASUREMENTS; m++) {
- m1 = &(priv->calib_info->band_info[s].ch1.
- measurements[c][m]);
- m2 = &(priv->calib_info->band_info[s].ch2.
- measurements[c][m]);
- omeas = &(chan_info->measurements[c][m]);
- omeas->actual_pow =
- (u8) iwl4965_interpolate_value(channel, ch_i1,
- m1->actual_pow,
- ch_i2,
- m2->actual_pow);
- omeas->gain_idx =
- (u8) iwl4965_interpolate_value(channel, ch_i1,
- m1->gain_idx, ch_i2,
- m2->gain_idx);
- omeas->temperature =
- (u8) iwl4965_interpolate_value(channel, ch_i1,
- m1->temperature,
- ch_i2,
- m2->temperature);
- omeas->pa_det =
- (s8) iwl4965_interpolate_value(channel, ch_i1,
- m1->pa_det, ch_i2,
- m2->pa_det);
- IWL_DEBUG_TXPOWER(priv,
- "chain %d meas %d AP1=%d AP2=%d AP=%d\n", c, m,
- m1->actual_pow, m2->actual_pow, omeas->actual_pow);
- IWL_DEBUG_TXPOWER(priv,
- "chain %d meas %d NI1=%d NI2=%d NI=%d\n", c, m,
- m1->gain_idx, m2->gain_idx, omeas->gain_idx);
- IWL_DEBUG_TXPOWER(priv,
- "chain %d meas %d PA1=%d PA2=%d PA=%d\n", c, m,
- m1->pa_det, m2->pa_det, omeas->pa_det);
- IWL_DEBUG_TXPOWER(priv,
- "chain %d meas %d T1=%d T2=%d T=%d\n", c, m,
- m1->temperature, m2->temperature,
- omeas->temperature);
- }
- }
- return 0;
- }
- /* bit-rate-dependent table to prevent Tx distortion, in half-dB units,
- * for OFDM 6, 12, 18, 24, 36, 48, 54, 60 MBit, and CCK all rates. */
- static s32 back_off_table[] = {
- 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 20 MHz */
- 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 20 MHz */
- 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 40 MHz */
- 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 40 MHz */
- 10 /* CCK */
- };
- /* Thermal compensation values for txpower for various frequency ranges ...
- * ratios from 3:1 to 4.5:1 of degrees (Celsius) per half-dB gain adjust */
- static struct iwl4965_txpower_comp_entry {
- s32 degrees_per_05db_a;
- s32 degrees_per_05db_a_denom;
- } tx_power_cmp_tble[CALIB_CH_GROUP_MAX] = {
- {9, 2}, /* group 0 5.2, ch 34-43 */
- {4, 1}, /* group 1 5.2, ch 44-70 */
- {4, 1}, /* group 2 5.2, ch 71-124 */
- {4, 1}, /* group 3 5.2, ch 125-200 */
- {3, 1} /* group 4 2.4, ch all */
- };
- static s32 get_min_power_index(s32 rate_power_index, u32 band)
- {
- if (!band) {
- if ((rate_power_index & 7) <= 4)
- return MIN_TX_GAIN_INDEX_52GHZ_EXT;
- }
- return MIN_TX_GAIN_INDEX;
- }
- struct gain_entry {
- u8 dsp;
- u8 radio;
- };
- static const struct gain_entry gain_table[2][108] = {
- /* 5.2GHz power gain index table */
- {
- {123, 0x3F}, /* highest txpower */
- {117, 0x3F},
- {110, 0x3F},
- {104, 0x3F},
- {98, 0x3F},
- {110, 0x3E},
- {104, 0x3E},
- {98, 0x3E},
- {110, 0x3D},
- {104, 0x3D},
- {98, 0x3D},
- {110, 0x3C},
- {104, 0x3C},
- {98, 0x3C},
- {110, 0x3B},
- {104, 0x3B},
- {98, 0x3B},
- {110, 0x3A},
- {104, 0x3A},
- {98, 0x3A},
- {110, 0x39},
- {104, 0x39},
- {98, 0x39},
- {110, 0x38},
- {104, 0x38},
- {98, 0x38},
- {110, 0x37},
- {104, 0x37},
- {98, 0x37},
- {110, 0x36},
- {104, 0x36},
- {98, 0x36},
- {110, 0x35},
- {104, 0x35},
- {98, 0x35},
- {110, 0x34},
- {104, 0x34},
- {98, 0x34},
- {110, 0x33},
- {104, 0x33},
- {98, 0x33},
- {110, 0x32},
- {104, 0x32},
- {98, 0x32},
- {110, 0x31},
- {104, 0x31},
- {98, 0x31},
- {110, 0x30},
- {104, 0x30},
- {98, 0x30},
- {110, 0x25},
- {104, 0x25},
- {98, 0x25},
- {110, 0x24},
- {104, 0x24},
- {98, 0x24},
- {110, 0x23},
- {104, 0x23},
- {98, 0x23},
- {110, 0x22},
- {104, 0x18},
- {98, 0x18},
- {110, 0x17},
- {104, 0x17},
- {98, 0x17},
- {110, 0x16},
- {104, 0x16},
- {98, 0x16},
- {110, 0x15},
- {104, 0x15},
- {98, 0x15},
- {110, 0x14},
- {104, 0x14},
- {98, 0x14},
- {110, 0x13},
- {104, 0x13},
- {98, 0x13},
- {110, 0x12},
- {104, 0x08},
- {98, 0x08},
- {110, 0x07},
- {104, 0x07},
- {98, 0x07},
- {110, 0x06},
- {104, 0x06},
- {98, 0x06},
- {110, 0x05},
- {104, 0x05},
- {98, 0x05},
- {110, 0x04},
- {104, 0x04},
- {98, 0x04},
- {110, 0x03},
- {104, 0x03},
- {98, 0x03},
- {110, 0x02},
- {104, 0x02},
- {98, 0x02},
- {110, 0x01},
- {104, 0x01},
- {98, 0x01},
- {110, 0x00},
- {104, 0x00},
- {98, 0x00},
- {93, 0x00},
- {88, 0x00},
- {83, 0x00},
- {78, 0x00},
- },
- /* 2.4GHz power gain index table */
- {
- {110, 0x3f}, /* highest txpower */
- {104, 0x3f},
- {98, 0x3f},
- {110, 0x3e},
- {104, 0x3e},
- {98, 0x3e},
- {110, 0x3d},
- {104, 0x3d},
- {98, 0x3d},
- {110, 0x3c},
- {104, 0x3c},
- {98, 0x3c},
- {110, 0x3b},
- {104, 0x3b},
- {98, 0x3b},
- {110, 0x3a},
- {104, 0x3a},
- {98, 0x3a},
- {110, 0x39},
- {104, 0x39},
- {98, 0x39},
- {110, 0x38},
- {104, 0x38},
- {98, 0x38},
- {110, 0x37},
- {104, 0x37},
- {98, 0x37},
- {110, 0x36},
- {104, 0x36},
- {98, 0x36},
- {110, 0x35},
- {104, 0x35},
- {98, 0x35},
- {110, 0x34},
- {104, 0x34},
- {98, 0x34},
- {110, 0x33},
- {104, 0x33},
- {98, 0x33},
- {110, 0x32},
- {104, 0x32},
- {98, 0x32},
- {110, 0x31},
- {104, 0x31},
- {98, 0x31},
- {110, 0x30},
- {104, 0x30},
- {98, 0x30},
- {110, 0x6},
- {104, 0x6},
- {98, 0x6},
- {110, 0x5},
- {104, 0x5},
- {98, 0x5},
- {110, 0x4},
- {104, 0x4},
- {98, 0x4},
- {110, 0x3},
- {104, 0x3},
- {98, 0x3},
- {110, 0x2},
- {104, 0x2},
- {98, 0x2},
- {110, 0x1},
- {104, 0x1},
- {98, 0x1},
- {110, 0x0},
- {104, 0x0},
- {98, 0x0},
- {97, 0},
- {96, 0},
- {95, 0},
- {94, 0},
- {93, 0},
- {92, 0},
- {91, 0},
- {90, 0},
- {89, 0},
- {88, 0},
- {87, 0},
- {86, 0},
- {85, 0},
- {84, 0},
- {83, 0},
- {82, 0},
- {81, 0},
- {80, 0},
- {79, 0},
- {78, 0},
- {77, 0},
- {76, 0},
- {75, 0},
- {74, 0},
- {73, 0},
- {72, 0},
- {71, 0},
- {70, 0},
- {69, 0},
- {68, 0},
- {67, 0},
- {66, 0},
- {65, 0},
- {64, 0},
- {63, 0},
- {62, 0},
- {61, 0},
- {60, 0},
- {59, 0},
- }
- };
- static int iwl4965_fill_txpower_tbl(struct iwl_priv *priv, u8 band, u16 channel,
- u8 is_fat, u8 ctrl_chan_high,
- struct iwl4965_tx_power_db *tx_power_tbl)
- {
- u8 saturation_power;
- s32 target_power;
- s32 user_target_power;
- s32 power_limit;
- s32 current_temp;
- s32 reg_limit;
- s32 current_regulatory;
- s32 txatten_grp = CALIB_CH_GROUP_MAX;
- int i;
- int c;
- const struct iwl_channel_info *ch_info = NULL;
- struct iwl_eeprom_calib_ch_info ch_eeprom_info;
- const struct iwl_eeprom_calib_measure *measurement;
- s16 voltage;
- s32 init_voltage;
- s32 voltage_compensation;
- s32 degrees_per_05db_num;
- s32 degrees_per_05db_denom;
- s32 factory_temp;
- s32 temperature_comp[2];
- s32 factory_gain_index[2];
- s32 factory_actual_pwr[2];
- s32 power_index;
- /* tx_power_user_lmt is in dBm, convert to half-dBm (half-dB units
- * are used for indexing into txpower table) */
- user_target_power = 2 * priv->tx_power_user_lmt;
- /* Get current (RXON) channel, band, width */
- IWL_DEBUG_TXPOWER(priv, "chan %d band %d is_fat %d\n", channel, band,
- is_fat);
- ch_info = iwl_get_channel_info(priv, priv->band, channel);
- if (!is_channel_valid(ch_info))
- return -EINVAL;
- /* get txatten group, used to select 1) thermal txpower adjustment
- * and 2) mimo txpower balance between Tx chains. */
- txatten_grp = iwl4965_get_tx_atten_grp(channel);
- if (txatten_grp < 0) {
- IWL_ERR(priv, "Can't find txatten group for channel %d.\n",
- channel);
- return -EINVAL;
- }
- IWL_DEBUG_TXPOWER(priv, "channel %d belongs to txatten group %d\n",
- channel, txatten_grp);
- if (is_fat) {
- if (ctrl_chan_high)
- channel -= 2;
- else
- channel += 2;
- }
- /* hardware txpower limits ...
- * saturation (clipping distortion) txpowers are in half-dBm */
- if (band)
- saturation_power = priv->calib_info->saturation_power24;
- else
- saturation_power = priv->calib_info->saturation_power52;
- if (saturation_power < IWL_TX_POWER_SATURATION_MIN ||
- saturation_power > IWL_TX_POWER_SATURATION_MAX) {
- if (band)
- saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_24;
- else
- saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_52;
- }
- /* regulatory txpower limits ... reg_limit values are in half-dBm,
- * max_power_avg values are in dBm, convert * 2 */
- if (is_fat)
- reg_limit = ch_info->fat_max_power_avg * 2;
- else
- reg_limit = ch_info->max_power_avg * 2;
- if ((reg_limit < IWL_TX_POWER_REGULATORY_MIN) ||
- (reg_limit > IWL_TX_POWER_REGULATORY_MAX)) {
- if (band)
- reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_24;
- else
- reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_52;
- }
- /* Interpolate txpower calibration values for this channel,
- * based on factory calibration tests on spaced channels. */
- iwl4965_interpolate_chan(priv, channel, &ch_eeprom_info);
- /* calculate tx gain adjustment based on power supply voltage */
- voltage = priv->calib_info->voltage;
- init_voltage = (s32)le32_to_cpu(priv->card_alive_init.voltage);
- voltage_compensation =
- iwl4965_get_voltage_compensation(voltage, init_voltage);
- IWL_DEBUG_TXPOWER(priv, "curr volt %d eeprom volt %d volt comp %d\n",
- init_voltage,
- voltage, voltage_compensation);
- /* get current temperature (Celsius) */
- current_temp = max(priv->temperature, IWL_TX_POWER_TEMPERATURE_MIN);
- current_temp = min(priv->temperature, IWL_TX_POWER_TEMPERATURE_MAX);
- current_temp = KELVIN_TO_CELSIUS(current_temp);
- /* select thermal txpower adjustment params, based on channel group
- * (same frequency group used for mimo txatten adjustment) */
- degrees_per_05db_num =
- tx_power_cmp_tble[txatten_grp].degrees_per_05db_a;
- degrees_per_05db_denom =
- tx_power_cmp_tble[txatten_grp].degrees_per_05db_a_denom;
- /* get per-chain txpower values from factory measurements */
- for (c = 0; c < 2; c++) {
- measurement = &ch_eeprom_info.measurements[c][1];
- /* txgain adjustment (in half-dB steps) based on difference
- * between factory and current temperature */
- factory_temp = measurement->temperature;
- iwl4965_math_div_round((current_temp - factory_temp) *
- degrees_per_05db_denom,
- degrees_per_05db_num,
- &temperature_comp[c]);
- factory_gain_index[c] = measurement->gain_idx;
- factory_actual_pwr[c] = measurement->actual_pow;
- IWL_DEBUG_TXPOWER(priv, "chain = %d\n", c);
- IWL_DEBUG_TXPOWER(priv, "fctry tmp %d, "
- "curr tmp %d, comp %d steps\n",
- factory_temp, current_temp,
- temperature_comp[c]);
- IWL_DEBUG_TXPOWER(priv, "fctry idx %d, fctry pwr %d\n",
- factory_gain_index[c],
- factory_actual_pwr[c]);
- }
- /* for each of 33 bit-rates (including 1 for CCK) */
- for (i = 0; i < POWER_TABLE_NUM_ENTRIES; i++) {
- u8 is_mimo_rate;
- union iwl4965_tx_power_dual_stream tx_power;
- /* for mimo, reduce each chain's txpower by half
- * (3dB, 6 steps), so total output power is regulatory
- * compliant. */
- if (i & 0x8) {
- current_regulatory = reg_limit -
- IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION;
- is_mimo_rate = 1;
- } else {
- current_regulatory = reg_limit;
- is_mimo_rate = 0;
- }
- /* find txpower limit, either hardware or regulatory */
- power_limit = saturation_power - back_off_table[i];
- if (power_limit > current_regulatory)
- power_limit = current_regulatory;
- /* reduce user's txpower request if necessary
- * for this rate on this channel */
- target_power = user_target_power;
- if (target_power > power_limit)
- target_power = power_limit;
- IWL_DEBUG_TXPOWER(priv, "rate %d sat %d reg %d usr %d tgt %d\n",
- i, saturation_power - back_off_table[i],
- current_regulatory, user_target_power,
- target_power);
- /* for each of 2 Tx chains (radio transmitters) */
- for (c = 0; c < 2; c++) {
- s32 atten_value;
- if (is_mimo_rate)
- atten_value =
- (s32)le32_to_cpu(priv->card_alive_init.
- tx_atten[txatten_grp][c]);
- else
- atten_value = 0;
- /* calculate index; higher index means lower txpower */
- power_index = (u8) (factory_gain_index[c] -
- (target_power -
- factory_actual_pwr[c]) -
- temperature_comp[c] -
- voltage_compensation +
- atten_value);
- /* IWL_DEBUG_TXPOWER(priv, "calculated txpower index %d\n",
- power_index); */
- if (power_index < get_min_power_index(i, band))
- power_index = get_min_power_index(i, band);
- /* adjust 5 GHz index to support negative indexes */
- if (!band)
- power_index += 9;
- /* CCK, rate 32, reduce txpower for CCK */
- if (i == POWER_TABLE_CCK_ENTRY)
- power_index +=
- IWL_TX_POWER_CCK_COMPENSATION_C_STEP;
- /* stay within the table! */
- if (power_index > 107) {
- IWL_WARN(priv, "txpower index %d > 107\n",
- power_index);
- power_index = 107;
- }
- if (power_index < 0) {
- IWL_WARN(priv, "txpower index %d < 0\n",
- power_index);
- power_index = 0;
- }
- /* fill txpower command for this rate/chain */
- tx_power.s.radio_tx_gain[c] =
- gain_table[band][power_index].radio;
- tx_power.s.dsp_predis_atten[c] =
- gain_table[band][power_index].dsp;
- IWL_DEBUG_TXPOWER(priv, "chain %d mimo %d index %d "
- "gain 0x%02x dsp %d\n",
- c, atten_value, power_index,
- tx_power.s.radio_tx_gain[c],
- tx_power.s.dsp_predis_atten[c]);
- } /* for each chain */
- tx_power_tbl->power_tbl[i].dw = cpu_to_le32(tx_power.dw);
- } /* for each rate */
- return 0;
- }
- /**
- * iwl4965_send_tx_power - Configure the TXPOWER level user limit
- *
- * Uses the active RXON for channel, band, and characteristics (fat, high)
- * The power limit is taken from priv->tx_power_user_lmt.
- */
- static int iwl4965_send_tx_power(struct iwl_priv *priv)
- {
- struct iwl4965_txpowertable_cmd cmd = { 0 };
- int ret;
- u8 band = 0;
- u8 is_fat = 0;
- u8 ctrl_chan_high = 0;
- if (test_bit(STATUS_SCANNING, &priv->status)) {
- /* If this gets hit a lot, switch it to a BUG() and catch
- * the stack trace to find out who is calling this during
- * a scan. */
- IWL_WARN(priv, "TX Power requested while scanning!\n");
- return -EAGAIN;
- }
- band = priv->band == IEEE80211_BAND_2GHZ;
- is_fat = is_fat_channel(priv->active_rxon.flags);
- if (is_fat &&
- (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
- ctrl_chan_high = 1;
- cmd.band = band;
- cmd.channel = priv->active_rxon.channel;
- ret = iwl4965_fill_txpower_tbl(priv, band,
- le16_to_cpu(priv->active_rxon.channel),
- is_fat, ctrl_chan_high, &cmd.tx_power);
- if (ret)
- goto out;
- ret = iwl_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD, sizeof(cmd), &cmd);
- out:
- return ret;
- }
- static int iwl4965_send_rxon_assoc(struct iwl_priv *priv)
- {
- int ret = 0;
- struct iwl4965_rxon_assoc_cmd rxon_assoc;
- const struct iwl_rxon_cmd *rxon1 = &priv->staging_rxon;
- const struct iwl_rxon_cmd *rxon2 = &priv->active_rxon;
- if ((rxon1->flags == rxon2->flags) &&
- (rxon1->filter_flags == rxon2->filter_flags) &&
- (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
- (rxon1->ofdm_ht_single_stream_basic_rates ==
- rxon2->ofdm_ht_single_stream_basic_rates) &&
- (rxon1->ofdm_ht_dual_stream_basic_rates ==
- rxon2->ofdm_ht_dual_stream_basic_rates) &&
- (rxon1->rx_chain == rxon2->rx_chain) &&
- (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
- IWL_DEBUG_INFO(priv, "Using current RXON_ASSOC. Not resending.\n");
- return 0;
- }
- rxon_assoc.flags = priv->staging_rxon.flags;
- rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
- rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
- rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
- rxon_assoc.reserved = 0;
- rxon_assoc.ofdm_ht_single_stream_basic_rates =
- priv->staging_rxon.ofdm_ht_single_stream_basic_rates;
- rxon_assoc.ofdm_ht_dual_stream_basic_rates =
- priv->staging_rxon.ofdm_ht_dual_stream_basic_rates;
- rxon_assoc.rx_chain_select_flags = priv->staging_rxon.rx_chain;
- ret = iwl_send_cmd_pdu_async(priv, REPLY_RXON_ASSOC,
- sizeof(rxon_assoc), &rxon_assoc, NULL);
- if (ret)
- return ret;
- return ret;
- }
- #ifdef IEEE80211_CONF_CHANNEL_SWITCH
- static int iwl4965_hw_channel_switch(struct iwl_priv *priv, u16 channel)
- {
- int rc;
- u8 band = 0;
- u8 is_fat = 0;
- u8 ctrl_chan_high = 0;
- struct iwl4965_channel_switch_cmd cmd = { 0 };
- const struct iwl_channel_info *ch_info;
- band = priv->band == IEEE80211_BAND_2GHZ;
- ch_info = iwl_get_channel_info(priv, priv->band, channel);
- is_fat = is_fat_channel(priv->staging_rxon.flags);
- if (is_fat &&
- (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
- ctrl_chan_high = 1;
- cmd.band = band;
- cmd.expect_beacon = 0;
- cmd.channel = cpu_to_le16(channel);
- cmd.rxon_flags = priv->active_rxon.flags;
- cmd.rxon_filter_flags = priv->active_rxon.filter_flags;
- cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
- if (ch_info)
- cmd.expect_beacon = is_channel_radar(ch_info);
- else
- cmd.expect_beacon = 1;
- rc = iwl4965_fill_txpower_tbl(priv, band, channel, is_fat,
- ctrl_chan_high, &cmd.tx_power);
- if (rc) {
- IWL_DEBUG_11H(priv, "error:%d fill txpower_tbl\n", rc);
- return rc;
- }
- rc = iwl_send_cmd_pdu(priv, REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd);
- return rc;
- }
- #endif
- /**
- * iwl4965_txq_update_byte_cnt_tbl - Set up entry in Tx byte-count array
- */
- static void iwl4965_txq_update_byte_cnt_tbl(struct iwl_priv *priv,
- struct iwl_tx_queue *txq,
- u16 byte_cnt)
- {
- struct iwl4965_scd_bc_tbl *scd_bc_tbl = priv->scd_bc_tbls.addr;
- int txq_id = txq->q.id;
- int write_ptr = txq->q.write_ptr;
- int len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE;
- __le16 bc_ent;
- WARN_ON(len > 0xFFF || write_ptr >= TFD_QUEUE_SIZE_MAX);
- bc_ent = cpu_to_le16(len & 0xFFF);
- /* Set up byte count within first 256 entries */
- scd_bc_tbl[txq_id].tfd_offset[write_ptr] = bc_ent;
- /* If within first 64 entries, duplicate at end */
- if (write_ptr < TFD_QUEUE_SIZE_BC_DUP)
- scd_bc_tbl[txq_id].
- tfd_offset[TFD_QUEUE_SIZE_MAX + write_ptr] = bc_ent;
- }
- /**
- * sign_extend - Sign extend a value using specified bit as sign-bit
- *
- * Example: sign_extend(9, 3) would return -7 as bit3 of 1001b is 1
- * and bit0..2 is 001b which when sign extended to 1111111111111001b is -7.
- *
- * @param oper value to sign extend
- * @param index 0 based bit index (0<=index<32) to sign bit
- */
- static s32 sign_extend(u32 oper, int index)
- {
- u8 shift = 31 - index;
- return (s32)(oper << shift) >> shift;
- }
- /**
- * iwl4965_hw_get_temperature - return the calibrated temperature (in Kelvin)
- * @statistics: Provides the temperature reading from the uCode
- *
- * A return of <0 indicates bogus data in the statistics
- */
- static int iwl4965_hw_get_temperature(const struct iwl_priv *priv)
- {
- s32 temperature;
- s32 vt;
- s32 R1, R2, R3;
- u32 R4;
- if (test_bit(STATUS_TEMPERATURE, &priv->status) &&
- (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)) {
- IWL_DEBUG_TEMP(priv, "Running FAT temperature calibration\n");
- R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
- R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
- R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
- R4 = le32_to_cpu(priv->card_alive_init.therm_r4[1]);
- } else {
- IWL_DEBUG_TEMP(priv, "Running temperature calibration\n");
- R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
- R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
- R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
- R4 = le32_to_cpu(priv->card_alive_init.therm_r4[0]);
- }
- /*
- * Temperature is only 23 bits, so sign extend out to 32.
- *
- * NOTE If we haven't received a statistics notification yet
- * with an updated temperature, use R4 provided to us in the
- * "initialize" ALIVE response.
- */
- if (!test_bit(STATUS_TEMPERATURE, &priv->status))
- vt = sign_extend(R4, 23);
- else
- vt = sign_extend(
- le32_to_cpu(priv->statistics.general.temperature), 23);
- IWL_DEBUG_TEMP(priv, "Calib values R[1-3]: %d %d %d R4: %d\n", R1, R2, R3, vt);
- if (R3 == R1) {
- IWL_ERR(priv, "Calibration conflict R1 == R3\n");
- return -1;
- }
- /* Calculate temperature in degrees Kelvin, adjust by 97%.
- * Add offset to center the adjustment around 0 degrees Centigrade. */
- temperature = TEMPERATURE_CALIB_A_VAL * (vt - R2);
- temperature /= (R3 - R1);
- temperature = (temperature * 97) / 100 + TEMPERATURE_CALIB_KELVIN_OFFSET;
- IWL_DEBUG_TEMP(priv, "Calibrated temperature: %dK, %dC\n",
- temperature, KELVIN_TO_CELSIUS(temperature));
- return temperature;
- }
- /* Adjust Txpower only if temperature variance is greater than threshold. */
- #define IWL_TEMPERATURE_THRESHOLD 3
- /**
- * iwl4965_is_temp_calib_needed - determines if new calibration is needed
- *
- * If the temperature changed has changed sufficiently, then a recalibration
- * is needed.
- *
- * Assumes caller will replace priv->last_temperature once calibration
- * executed.
- */
- static int iwl4965_is_temp_calib_needed(struct iwl_priv *priv)
- {
- int temp_diff;
- if (!test_bit(STATUS_STATISTICS, &priv->status)) {
- IWL_DEBUG_TEMP(priv, "Temperature not updated -- no statistics.\n");
- return 0;
- }
- temp_diff = priv->temperature - priv->last_temperature;
- /* get absolute value */
- if (temp_diff < 0) {
- IWL_DEBUG_POWER(priv, "Getting cooler, delta %d, \n", temp_diff);
- temp_diff = -temp_diff;
- } else if (temp_diff == 0)
- IWL_DEBUG_POWER(priv, "Same temp, \n");
- else
- IWL_DEBUG_POWER(priv, "Getting warmer, delta %d, \n", temp_diff);
- if (temp_diff < IWL_TEMPERATURE_THRESHOLD) {
- IWL_DEBUG_POWER(priv, "Thermal txpower calib not needed\n");
- return 0;
- }
- IWL_DEBUG_POWER(priv, "Thermal txpower calib needed\n");
- return 1;
- }
- static void iwl4965_temperature_calib(struct iwl_priv *priv)
- {
- s32 temp;
- temp = iwl4965_hw_get_temperature(priv);
- if (temp < 0)
- return;
- if (priv->temperature != temp) {
- if (priv->temperature)
- IWL_DEBUG_TEMP(priv, "Temperature changed "
- "from %dC to %dC\n",
- KELVIN_TO_CELSIUS(priv->temperature),
- KELVIN_TO_CELSIUS(temp));
- else
- IWL_DEBUG_TEMP(priv, "Temperature "
- "initialized to %dC\n",
- KELVIN_TO_CELSIUS(temp));
- }
- priv->temperature = temp;
- set_bit(STATUS_TEMPERATURE, &priv->status);
- if (!priv->disable_tx_power_cal &&
- unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
- iwl4965_is_temp_calib_needed(priv))
- queue_work(priv->workqueue, &priv->txpower_work);
- }
- /**
- * iwl4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
- */
- static void iwl4965_tx_queue_stop_scheduler(struct iwl_priv *priv,
- u16 txq_id)
- {
- /* Simply stop the queue, but don't change any configuration;
- * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
- iwl_write_prph(priv,
- IWL49_SCD_QUEUE_STATUS_BITS(txq_id),
- (0 << IWL49_SCD_QUEUE_STTS_REG_POS_ACTIVE)|
- (1 << IWL49_SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
- }
- /**
- * txq_id must be greater than IWL49_FIRST_AMPDU_QUEUE
- * priv->lock must be held by the caller
- */
- static int iwl4965_txq_agg_disable(struct iwl_priv *priv, u16 txq_id,
- u16 ssn_idx, u8 tx_fifo)
- {
- int ret = 0;
- if ((IWL49_FIRST_AMPDU_QUEUE > txq_id) ||
- (IWL49_FIRST_AMPDU_QUEUE + IWL49_NUM_AMPDU_QUEUES <= txq_id)) {
- IWL_WARN(priv,
- "queue number out of range: %d, must be %d to %d\n",
- txq_id, IWL49_FIRST_AMPDU_QUEUE,
- IWL49_FIRST_AMPDU_QUEUE + IWL49_NUM_AMPDU_QUEUES - 1);
- return -EINVAL;
- }
- ret = iwl_grab_nic_access(priv);
- if (ret)
- return ret;
- iwl4965_tx_queue_stop_scheduler(priv, txq_id);
- iwl_clear_bits_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
- priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
- priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
- /* supposes that ssn_idx is valid (!= 0xFFF) */
- iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
- iwl_clear_bits_prph(priv, IWL49_SCD_INTERRUPT_MASK, (1 << txq_id));
- iwl_txq_ctx_deactivate(priv, txq_id);
- iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 0);
- iwl_release_nic_access(priv);
- return 0;
- }
- /**
- * iwl4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue
- */
- static int iwl4965_tx_queue_set_q2ratid(struct iwl_priv *priv, u16 ra_tid,
- u16 txq_id)
- {
- u32 tbl_dw_addr;
- u32 tbl_dw;
- u16 scd_q2ratid;
- scd_q2ratid = ra_tid & IWL_SCD_QUEUE_RA_TID_MAP_RATID_MSK;
- tbl_dw_addr = priv->scd_base_addr +
- IWL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id);
- tbl_dw = iwl_read_targ_mem(priv, tbl_dw_addr);
- if (txq_id & 0x1)
- tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF);
- else
- tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000);
- iwl_write_targ_mem(priv, tbl_dw_addr, tbl_dw);
- return 0;
- }
- /**
- * iwl4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue
- *
- * NOTE: txq_id must be greater than IWL49_FIRST_AMPDU_QUEUE,
- * i.e. it must be one of the higher queues used for aggregation
- */
- static int iwl4965_txq_agg_enable(struct iwl_priv *priv, int txq_id,
- int tx_fifo, int sta_id, int tid, u16 ssn_idx)
- {
- unsigned long flags;
- int ret;
- u16 ra_tid;
- if ((IWL49_FIRST_AMPDU_QUEUE > txq_id) ||
- (IWL49_FIRST_AMPDU_QUEUE + IWL49_NUM_AMPDU_QUEUES <= txq_id)) {
- IWL_WARN(priv,
- "queue number out of range: %d, must be %d to %d\n",
- txq_id, IWL49_FIRST_AMPDU_QUEUE,
- IWL49_FIRST_AMPDU_QUEUE + IWL49_NUM_AMPDU_QUEUES - 1);
- return -EINVAL;
- }
- ra_tid = BUILD_RAxTID(sta_id, tid);
- /* Modify device's station table to Tx this TID */
- iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
- spin_lock_irqsave(&priv->lock, flags);
- ret = iwl_grab_nic_access(priv);
- if (ret) {
- spin_unlock_irqrestore(&priv->lock, flags);
- return ret;
- }
- /* Stop this Tx queue before configuring it */
- iwl4965_tx_queue_stop_scheduler(priv, txq_id);
- /* Map receiver-address / traffic-ID to this queue */
- iwl4965_tx_queue_set_q2ratid(priv, ra_tid, txq_id);
- /* Set this queue as a chain-building queue */
- iwl_set_bits_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
- /* Place first TFD at index corresponding to start sequence number.
- * Assumes that ssn_idx is valid (!= 0xFFF) */
- priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
- priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
- iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
- /* Set up Tx window size and frame limit for this queue */
- iwl_write_targ_mem(priv,
- priv->scd_base_addr + IWL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id),
- (SCD_WIN_SIZE << IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
- IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
- iwl_write_targ_mem(priv, priv->scd_base_addr +
- IWL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32),
- (SCD_FRAME_LIMIT << IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS)
- & IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
- iwl_set_bits_prph(priv, IWL49_SCD_INTERRUPT_MASK, (1 << txq_id));
- /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
- iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 1);
- iwl_release_nic_access(priv);
- spin_unlock_irqrestore(&priv->lock, flags);
- return 0;
- }
- static u16 iwl4965_get_hcmd_size(u8 cmd_id, u16 len)
- {
- switch (cmd_id) {
- case REPLY_RXON:
- return (u16) sizeof(struct iwl4965_rxon_cmd);
- default:
- return len;
- }
- }
- static u16 iwl4965_build_addsta_hcmd(const struct iwl_addsta_cmd *cmd, u8 *data)
- {
- struct iwl4965_addsta_cmd *addsta = (struct iwl4965_addsta_cmd *)data;
- addsta->mode = cmd->mode;
- memcpy(&addsta->sta, &cmd->sta, sizeof(struct sta_id_modify));
- memcpy(&addsta->key, &cmd->key, sizeof(struct iwl4965_keyinfo));
- addsta->station_flags = cmd->station_flags;
- addsta->station_flags_msk = cmd->station_flags_msk;
- addsta->tid_disable_tx = cmd->tid_disable_tx;
- addsta->add_immediate_ba_tid = cmd->add_immediate_ba_tid;
- addsta->remove_immediate_ba_tid = cmd->remove_immediate_ba_tid;
- addsta->add_immediate_ba_ssn = cmd->add_immediate_ba_ssn;
- addsta->reserved1 = cpu_to_le16(0);
- addsta->reserved2 = cpu_to_le32(0);
- return (u16)sizeof(struct iwl4965_addsta_cmd);
- }
- static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
- {
- return le32_to_cpup(&tx_resp->u.status + tx_resp->frame_count) & MAX_SN;
- }
- /**
- * iwl4965_tx_status_reply_tx - Handle Tx response for frames in aggregation queue
- */
- static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
- struct iwl_ht_agg *agg,
- struct iwl4965_tx_resp *tx_resp,
- int txq_id, u16 start_idx)
- {
- u16 status;
- struct agg_tx_status *frame_status = tx_resp->u.agg_status;
- struct ieee80211_tx_info *info = NULL;
- struct ieee80211_hdr *hdr = NULL;
- u32 rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
- int i, sh, idx;
- u16 seq;
- if (agg->wait_for_ba)
- IWL_DEBUG_TX_REPLY(priv, "got tx response w/o block-ack\n");
- agg->frame_count = tx_resp->frame_count;
- agg->start_idx = start_idx;
- agg->rate_n_flags = rate_n_flags;
- agg->bitmap = 0;
- /* num frames attempted by Tx command */
- if (agg->frame_count == 1) {
- /* Only one frame was attempted; no block-ack will arrive */
- status = le16_to_cpu(frame_status[0].status);
- idx = start_idx;
- /* FIXME: code repetition */
- IWL_DEBUG_TX_REPLY(priv, "FrameCnt = %d, StartIdx=%d idx=%d\n",
- agg->frame_count, agg->start_idx, idx);
- info = IEEE80211_SKB_CB(priv->txq[txq_id].txb[idx].skb[0]);
- info->status.rates[0].count = tx_resp->failure_frame + 1;
- info->flags &= ~IEEE80211_TX_CTL_AMPDU;
- info->flags |= iwl_is_tx_success(status) ?
- IEEE80211_TX_STAT_ACK : 0;
- iwl_hwrate_to_tx_control(priv, rate_n_flags, info);
- /* FIXME: code repetition end */
- IWL_DEBUG_TX_REPLY(priv, "1 Frame 0x%x failure :%d\n",
- status & 0xff, tx_resp->failure_frame);
- IWL_DEBUG_TX_REPLY(priv, "Rate Info rate_n_flags=%x\n", rate_n_flags);
- agg->wait_for_ba = 0;
- } else {
- /* Two or more frames were attempted; expect block-ack */
- u64 bitmap = 0;
- int start = agg->start_idx;
- /* Construct bit-map of pending frames within Tx window */
- for (i = 0; i < agg->frame_count; i++) {
- u16 sc;
- status = le16_to_cpu(frame_status[i].status);
- seq = le16_to_cpu(frame_status[i].sequence);
- idx = SEQ_TO_INDEX(seq);
- txq_id = SEQ_TO_QUEUE(seq);
- if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
- AGG_TX_STATE_ABORT_MSK))
- continue;
- IWL_DEBUG_TX_REPLY(priv, "FrameCnt = %d, txq_id=%d idx=%d\n",
- agg->frame_count, txq_id, idx);
- hdr = iwl_tx_queue_get_hdr(priv, txq_id, idx);
- sc = le16_to_cpu(hdr->seq_ctrl);
- if (idx != (SEQ_TO_SN(sc) & 0xff)) {
- IWL_ERR(priv,
- "BUG_ON idx doesn't match seq control"
- " idx=%d, seq_idx=%d, seq=%d\n",
- idx, SEQ_TO_SN(sc), hdr->seq_ctrl);
- return -1;
- }
- IWL_DEBUG_TX_REPLY(priv, "AGG Frame i=%d idx %d seq=%d\n",
- i, idx, SEQ_TO_SN(sc));
- sh = idx - start;
- if (sh > 64) {
- sh = (start - idx) + 0xff;
- bitmap = bitmap << sh;
- sh = 0;
- start = idx;
- } else if (sh < -64)
- sh = 0xff - (start - idx);
- else if (sh < 0) {
- sh = start - idx;
- start = idx;
- bitmap = bitmap << sh;
- sh = 0;
- }
- bitmap |= 1ULL << sh;
- IWL_DEBUG_TX_REPLY(priv, "start=%d bitmap=0x%llx\n",
- start, (unsigned long long)bitmap);
- }
- agg->bitmap = bitmap;
- agg->start_idx = start;
- IWL_DEBUG_TX_REPLY(priv, "Frames %d start_idx=%d bitmap=0x%llx\n",
- agg->frame_count, agg->start_idx,
- (unsigned long long)agg->bitmap);
- if (bitmap)
- agg->wait_for_ba = 1;
- }
- return 0;
- }
- /**
- * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
- */
- static void iwl4965_rx_reply_tx(struct iwl_priv *priv,
- struct iwl_rx_mem_buffer *rxb)
- {
- struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
- u16 sequence = le16_to_cpu(pkt->hdr.sequence);
- int txq_id = SEQ_TO_QUEUE(sequence);
- int index = SEQ_TO_INDEX(sequence);
- struct iwl_tx_queue *txq = &priv->txq[txq_id];
- struct ieee80211_hdr *hdr;
- struct ieee80211_tx_info *info;
- struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
- u32 status = le32_to_cpu(tx_resp->u.status);
- int tid = MAX_TID_COUNT;
- int sta_id;
- int freed;
- u8 *qc = NULL;
- if ((index >= txq->q.n_bd) || (iwl_queue_used(&txq->q, index) == 0)) {
- IWL_ERR(priv, "Read index for DMA queue txq_id (%d) index %d "
- "is out of range [0-%d] %d %d\n", txq_id,
- index, txq->q.n_bd, txq->q.write_ptr,
- txq->q.read_ptr);
- return;
- }
- info = IEEE80211_SKB_CB(txq->txb[txq->q.read_ptr].skb[0]);
- memset(&info->status, 0, sizeof(info->status));
- hdr = iwl_tx_queue_get_hdr(priv, txq_id, index);
- if (ieee80211_is_data_qos(hdr->frame_control)) {
- qc = ieee80211_get_qos_ctl(hdr);
- tid = qc[0] & 0xf;
- }
- sta_id = iwl_get_ra_sta_id(priv, hdr);
- if (txq->sched_retry && unlikely(sta_id == IWL_INVALID_STATION)) {
- IWL_ERR(priv, "Station not known\n");
- return;
- }
- if (txq->sched_retry) {
- const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
- struct iwl_ht_agg *agg = NULL;
- WARN_ON(!qc);
- agg = &priv->stations[sta_id].tid[tid].agg;
- iwl4965_tx_status_reply_tx(priv, agg, tx_resp, txq_id, index);
- /* check if BAR is needed */
- if ((tx_resp->frame_count == 1) && !iwl_is_tx_success(status))
- info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
- if (txq->q.read_ptr != (scd_ssn & 0xff)) {
- index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
- IWL_DEBUG_TX_REPLY(priv, "Retry scheduler reclaim scd_ssn "
- "%d index %d\n", scd_ssn , index);
- freed = iwl_tx_queue_reclaim(priv, txq_id, index);
- priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
- if (priv->mac80211_registered &&
- (iwl_queue_space(&txq->q) > txq->q.low_mark) &&
- (agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)) {
- if (agg->state == IWL_AGG_OFF)
- iwl_wake_queue(priv, txq_id);
- else
- iwl_wake_queue(priv, txq->swq_id);
- }
- }
- } else {
- info->status.rates[0].count = tx_resp->failure_frame + 1;
- info->flags |= iwl_is_tx_success(status) ?
- IEEE80211_TX_STAT_ACK : 0;
- iwl_hwrate_to_tx_control(priv,
- le32_to_cpu(tx_resp->rate_n_flags),
- info);
- IWL_DEBUG_TX_REPLY(priv, "TXQ %d status %s (0x%08x) "
- "rate_n_flags 0x%x retries %d\n",
- txq_id,
- iwl_get_tx_fail_reason(status), status,
- le32_to_cpu(tx_resp->rate_n_flags),
- tx_resp->failure_frame);
- freed = iwl_tx_queue_reclaim(priv, txq_id, index);
- if (qc && likely(sta_id != IWL_INVALID_STATION))
- priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
- if (priv->mac80211_registered &&
- (iwl_queue_space(&txq->q) > txq->q.low_mark))
- iwl_wake_queue(priv, txq_id);
- }
- if (qc && likely(sta_id != IWL_INVALID_STATION))
- iwl_txq_check_empty(priv, sta_id, tid, txq_id);
- if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
- IWL_ERR(priv, "TODO: Implement Tx ABORT REQUIRED!!!\n");
- }
- static int iwl4965_calc_rssi(struct iwl_priv *priv,
- struct iwl_rx_phy_res *rx_resp)
- {
- /* data from PHY/DSP regarding signal strength, etc.,
- * contents are always there, not configurable by host. */
- struct iwl4965_rx_non_cfg_phy *ncphy =
- (struct iwl4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy_buf;
- u32 agc = (le16_to_cpu(ncphy->agc_info) & IWL49_AGC_DB_MASK)
- >> IWL49_AGC_DB_POS;
- u32 valid_antennae =
- (le16_to_cpu(rx_resp->phy_flags) & IWL49_RX_PHY_FLAGS_ANTENNAE_MASK)
- >> IWL49_RX_PHY_FLAGS_ANTENNAE_OFFSET;
- u8 max_rssi = 0;
- u32 i;
- /* Find max rssi among 3 possible receivers.
- * These values are measured by the digital signal processor (DSP).
- * They should stay fairly constant even as the signal strength varies,
- * if the radio's automatic gain control (AGC) is working right.
- * AGC value (see below) will provide the "interesting" info. */
- for (i = 0; i < 3; i++)
- if (valid_antennae & (1 << i))
- max_rssi = max(ncphy->rssi_info[i << 1], max_rssi);
- IWL_DEBUG_STATS(priv, "Rssi In A %d B %d C %d Max %d AGC dB %d\n",
- ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4],
- max_rssi, agc);
- /* dBm = max_rssi dB - agc dB - constant.
- * Higher AGC (higher radio gain) means lower signal. */
- return max_rssi - agc - IWL49_RSSI_OFFSET;
- }
- /* Set up 4965-specific Rx frame reply handlers */
- static void iwl4965_rx_handler_setup(struct iwl_priv *priv)
- {
- /* Legacy Rx frames */
- priv->rx_handlers[REPLY_RX] = iwl_rx_reply_rx;
- /* Tx response */
- priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
- }
- static void iwl4965_setup_deferred_work(struct iwl_priv *priv)
- {
- INIT_WORK(&priv->txpower_work, iwl4965_bg_txpower_work);
- }
- static void iwl4965_cancel_deferred_work(struct iwl_priv *priv)
- {
- cancel_work_sync(&priv->txpower_work);
- }
- static struct iwl_hcmd_ops iwl4965_hcmd = {
- .rxon_assoc = iwl4965_send_rxon_assoc,
- };
- static struct iwl_hcmd_utils_ops iwl4965_hcmd_utils = {
- .get_hcmd_size = iwl4965_get_hcmd_size,
- .build_addsta_hcmd = iwl4965_build_addsta_hcmd,
- .chain_noise_reset = iwl4965_chain_noise_reset,
- .gain_computation = iwl4965_gain_computation,
- .rts_tx_cmd_flag = iwl4965_rts_tx_cmd_flag,
- .calc_rssi = iwl4965_calc_rssi,
- };
- static struct iwl_lib_ops iwl4965_lib = {
- .set_hw_params = iwl4965_hw_set_hw_params,
- .txq_update_byte_cnt_tbl = iwl4965_txq_update_byte_cnt_tbl,
- .txq_set_sched = iwl4965_txq_set_sched,
- .txq_agg_enable = iwl4965_txq_agg_enable,
- .txq_agg_disable = iwl4965_txq_agg_disable,
- .txq_attach_buf_to_tfd = iwl_hw_txq_attach_buf_to_tfd,
- .txq_free_tfd = iwl_hw_txq_free_tfd,
- .txq_init = iwl_hw_tx_queue_init,
- .rx_handler_setup = iwl4965_rx_handler_setup,
- .setup_deferred_work = iwl4965_setup_deferred_work,
- .cancel_deferred_work = iwl4965_cancel_deferred_work,
- .is_valid_rtc_data_addr = iwl4965_hw_valid_rtc_data_addr,
- .alive_notify = iwl4965_alive_notify,
- .init_alive_start = iwl4965_init_alive_start,
- .load_ucode = iwl4965_load_bsm,
- .apm_ops = {
- .init = iwl4965_apm_init,
- .reset = iwl4965_apm_reset,
- .stop = iwl4965_apm_stop,
- .config = iwl4965_nic_config,
- .set_pwr_src = iwl_set_pwr_src,
- },
- .eeprom_ops = {
- .regulatory_bands = {
- EEPROM_REGULATORY_BAND_1_CHANNELS,
- EEPROM_REGULATORY_BAND_2_CHANNELS,
- EEPROM_REGULATORY_BAND_3_CHANNELS,
- EEPROM_REGULATORY_BAND_4_CHANNELS,
- EEPROM_REGULATORY_BAND_5_CHANNELS,
- EEPROM_4965_REGULATORY_BAND_24_FAT_CHANNELS,
- EEPROM_4965_REGULATORY_BAND_52_FAT_CHANNELS
- },
- .verify_signature = iwlcore_eeprom_verify_signature,
- .acquire_semaphore = iwlcore_eeprom_acquire_semaphore,
- .release_semaphore = iwlcore_eeprom_release_semaphore,
- .calib_version = iwl4965_eeprom_calib_version,
- .query_addr = iwlcore_eeprom_query_addr,
- },
- .send_tx_power = iwl4965_send_tx_power,
- .update_chain_flags = iwl_update_chain_flags,
- .temperature = iwl4965_temperature_calib,
- };
- static struct iwl_ops iwl4965_ops = {
- .lib = &iwl4965_lib,
- .hcmd = &iwl4965_hcmd,
- .utils = &iwl4965_hcmd_utils,
- };
- struct iwl_cfg iwl4965_agn_cfg = {
- .name = "4965AGN",
- .fw_name_pre = IWL4965_FW_PRE,
- .ucode_api_max = IWL4965_UCODE_API_MAX,
- .ucode_api_min = IWL4965_UCODE_API_MIN,
- .sku = IWL_SKU_A|IWL_SKU_G|IWL_SKU_N,
- .eeprom_size = IWL4965_EEPROM_IMG_SIZE,
- .eeprom_ver = EEPROM_4965_EEPROM_VERSION,
- .eeprom_calib_ver = EEPROM_4965_TX_POWER_VERSION,
- .ops = &iwl4965_ops,
- .mod_params = &iwl4965_mod_params,
- };
- /* Module firmware */
- MODULE_FIRMWARE(IWL4965_MODULE_FIRMWARE(IWL4965_UCODE_API_MAX));
- module_param_named(antenna, iwl4965_mod_params.antenna, int, 0444);
- MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
- module_param_named(disable, iwl4965_mod_params.disable, int, 0444);
- MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
- module_param_named(swcrypto, iwl4965_mod_params.sw_crypto, int, 0444);
- MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])");
- module_param_named(debug, iwl4965_mod_params.debug, uint, 0444);
- MODULE_PARM_DESC(debug, "debug output mask");
- module_param_named(
- disable_hw_scan, iwl4965_mod_params.disable_hw_scan, int, 0444);
- MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
- module_param_named(queues_num, iwl4965_mod_params.num_of_queues, int, 0444);
- MODULE_PARM_DESC(queues_num, "number of hw queues.");
- /* 11n */
- module_param_named(11n_disable, iwl4965_mod_params.disable_11n, int, 0444);
- MODULE_PARM_DESC(11n_disable, "disable 11n functionality");
- module_param_named(amsdu_size_8K, iwl4965_mod_params.amsdu_size_8K, int, 0444);
- MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
- module_param_named(fw_restart4965, iwl4965_mod_params.restart_fw, int, 0444);
- MODULE_PARM_DESC(fw_restart4965, "restart firmware in case of error");
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