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nest-open-source / nest-guard / 1.0 / linux / 6754b876e4c89285b30ff59800d23e21ce2dbe3f / . / linux / drivers / net / wireless / iwlwifi / iwl-4965.c
blob: b207e3e9299f11dd6b8d02edf7e4b148b07c98d4 [file] [log] [blame]
/******************************************************************************
*
* Copyright(c) 2003 - 2010 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/sched.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-agn-calib.h"
#include "iwl-sta.h"
#include "iwl-agn-led.h"
#include "iwl-agn.h"
#include "iwl-agn-debugfs.h"
static int iwl4965_send_tx_power(struct iwl_priv *priv);
static int iwl4965_hw_get_temperature(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)
/* 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;
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)
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);
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;
int ret = 0;
/* bits 35:4 for 4965 */
pinst = priv->ucode_code.p_addr >> 4;
pdata = priv->ucode_data_backup.p_addr >> 4;
/* 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_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 bool is_ht40_channel(__le32 rxon_flags)
{
int chan_mod = le32_to_cpu(rxon_flags & RXON_FLG_CHANNEL_MODE_MSK)
>> RXON_FLG_CHANNEL_MODE_POS;
return ((chan_mod == CHANNEL_MODE_PURE_40) ||
(chan_mod == CHANNEL_MODE_MIXED));
}
/*
* 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 void iwl4965_nic_config(struct iwl_priv *priv)
{
unsigned long flags;
u16 radio_cfg;
spin_lock_irqsave(&priv->lock, flags);
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);
}
/* 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_any_associated(priv)) {
struct iwl_calib_diff_gain_cmd cmd;
/* clear data for chain noise calibration algorithm */
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;
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,
u8 default_chain)
{
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 = default_chain; 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;
}
}
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 s8 default_queue_to_tx_fifo[] = {
IWL_TX_FIFO_VO,
IWL_TX_FIFO_VI,
IWL_TX_FIFO_BE,
IWL_TX_FIFO_BK,
IWL49_CMD_FIFO_NUM,
IWL_TX_FIFO_UNUSED,
IWL_TX_FIFO_UNUSED,
};
static int iwl4965_alive_notify(struct iwl_priv *priv)
{
u32 a;
unsigned long flags;
int i, chan;
u32 reg_val;
spin_lock_irqsave(&priv->lock, flags);
/* 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 < priv->scd_base_addr +
IWL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(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_DEFAULT_CMD_QUEUE_NUM, 0);
/* make sure all queue are not stopped */
memset(&priv->queue_stopped[0], 0, sizeof(priv->queue_stopped));
for (i = 0; i < 4; i++)
atomic_set(&priv->queue_stop_count[i], 0);
/* reset to 0 to enable all the queue first */
priv->txq_ctx_active_msk = 0;
/* Map each Tx/cmd queue to its corresponding fifo */
BUILD_BUG_ON(ARRAY_SIZE(default_queue_to_tx_fifo) != 7);
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);
if (ac == IWL_TX_FIFO_UNUSED)
continue;
iwl4965_tx_queue_set_status(priv, &priv->txq[i], ac, 0);
}
spin_unlock_irqrestore(&priv->lock, flags);
return 0;
}
static struct iwl_sensitivity_ranges iwl4965_sensitivity = {
.min_nrg_cck = 97,
.max_nrg_cck = 0, /* not used, set to 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,
.barker_corr_th_min = 190,
.barker_corr_th_min_mrc = 390,
.nrg_th_cca = 62,
};
static void iwl4965_set_ct_threshold(struct iwl_priv *priv)
{
/* want Kelvin */
priv->hw_params.ct_kill_threshold =
CELSIUS_TO_KELVIN(CT_KILL_THRESHOLD_LEGACY);
}
/**
* 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 >= IWL_MIN_NUM_QUEUES &&
priv->cfg->mod_params->num_of_queues <= IWL49_NUM_QUEUES)
priv->cfg->base_params->num_of_queues =
priv->cfg->mod_params->num_of_queues;
priv->hw_params.max_txq_num = priv->cfg->base_params->num_of_queues;
priv->hw_params.dma_chnl_num = FH49_TCSR_CHNL_NUM;
priv->hw_params.scd_bc_tbls_size =
priv->cfg->base_params->num_of_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->contexts[IWL_RXON_CTX_BSS].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.ht40_channel = BIT(IEEE80211_BAND_5GHZ);
priv->hw_params.rx_wrt_ptr_reg = FH_RSCSR_CHNL0_WPTR;
priv->hw_params.tx_chains_num = num_of_ant(priv->cfg->valid_tx_ant);
priv->hw_params.rx_chains_num = num_of_ant(priv->cfg->valid_rx_ant);
priv->hw_params.valid_tx_ant = priv->cfg->valid_tx_ant;
priv->hw_params.valid_rx_ant = priv->cfg->valid_rx_ant;
iwl4965_set_ct_threshold(priv);
priv->hw_params.sens = &iwl4965_sensitivity;
priv->hw_params.beacon_time_tsf_bits = IWLAGN_EXT_BEACON_TIME_POS;
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_ht40, 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_ht40 %d\n", channel, band,
is_ht40);
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_ht40) {
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_ht40)
reg_limit = ch_info->ht40_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 = le16_to_cpu(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 (ht40, 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;
bool is_ht40 = false;
u8 ctrl_chan_high = 0;
struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
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_ht40 = is_ht40_channel(ctx->active.flags);
if (is_ht40 && (ctx->active.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
ctrl_chan_high = 1;
cmd.band = band;
cmd.channel = ctx->active.channel;
ret = iwl4965_fill_txpower_tbl(priv, band,
le16_to_cpu(ctx->active.channel),
is_ht40, 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,
struct iwl_rxon_context *ctx)
{
int ret = 0;
struct iwl4965_rxon_assoc_cmd rxon_assoc;
const struct iwl_rxon_cmd *rxon1 = &ctx->staging;
const struct iwl_rxon_cmd *rxon2 = &ctx->active;
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 = ctx->staging.flags;
rxon_assoc.filter_flags = ctx->staging.filter_flags;
rxon_assoc.ofdm_basic_rates = ctx->staging.ofdm_basic_rates;
rxon_assoc.cck_basic_rates = ctx->staging.cck_basic_rates;
rxon_assoc.reserved = 0;
rxon_assoc.ofdm_ht_single_stream_basic_rates =
ctx->staging.ofdm_ht_single_stream_basic_rates;
rxon_assoc.ofdm_ht_dual_stream_basic_rates =
ctx->staging.ofdm_ht_dual_stream_basic_rates;
rxon_assoc.rx_chain_select_flags = ctx->staging.rx_chain;
ret = iwl_send_cmd_pdu_async(priv, REPLY_RXON_ASSOC,
sizeof(rxon_assoc), &rxon_assoc, NULL);
if (ret)
return ret;
return ret;
}
static int iwl4965_hw_channel_switch(struct iwl_priv *priv,
struct ieee80211_channel_switch *ch_switch)
{
struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
int rc;
u8 band = 0;
bool is_ht40 = false;
u8 ctrl_chan_high = 0;
struct iwl4965_channel_switch_cmd cmd;
const struct iwl_channel_info *ch_info;
u32 switch_time_in_usec, ucode_switch_time;
u16 ch;
u32 tsf_low;
u8 switch_count;
u16 beacon_interval = le16_to_cpu(ctx->timing.beacon_interval);
struct ieee80211_vif *vif = ctx->vif;
band = priv->band == IEEE80211_BAND_2GHZ;
is_ht40 = is_ht40_channel(ctx->staging.flags);
if (is_ht40 &&
(ctx->staging.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
ctrl_chan_high = 1;
cmd.band = band;
cmd.expect_beacon = 0;
ch = ch_switch->channel->hw_value;
cmd.channel = cpu_to_le16(ch);
cmd.rxon_flags = ctx->staging.flags;
cmd.rxon_filter_flags = ctx->staging.filter_flags;
switch_count = ch_switch->count;
tsf_low = ch_switch->timestamp & 0x0ffffffff;
/*
* calculate the ucode channel switch time
* adding TSF as one of the factor for when to switch
*/
if ((priv->ucode_beacon_time > tsf_low) && beacon_interval) {
if (switch_count > ((priv->ucode_beacon_time - tsf_low) /
beacon_interval)) {
switch_count -= (priv->ucode_beacon_time -
tsf_low) / beacon_interval;
} else
switch_count = 0;
}
if (switch_count <= 1)
cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
else {
switch_time_in_usec =
vif->bss_conf.beacon_int * switch_count * TIME_UNIT;
ucode_switch_time = iwl_usecs_to_beacons(priv,
switch_time_in_usec,
beacon_interval);
cmd.switch_time = iwl_add_beacon_time(priv,
priv->ucode_beacon_time,
ucode_switch_time,
beacon_interval);
}
IWL_DEBUG_11H(priv, "uCode time for the switch is 0x%x\n",
cmd.switch_time);
ch_info = iwl_get_channel_info(priv, priv->band, ch);
if (ch_info)
cmd.expect_beacon = is_channel_radar(ch_info);
else {
IWL_ERR(priv, "invalid channel switch from %u to %u\n",
ctx->active.channel, ch);
return -EFAULT;
}
rc = iwl4965_fill_txpower_tbl(priv, band, ch, is_ht40,
ctrl_chan_high, &cmd.tx_power);
if (rc) {
IWL_DEBUG_11H(priv, "error:%d fill txpower_tbl\n", rc);
return rc;
}
priv->switch_rxon.channel = cmd.channel;
priv->switch_rxon.switch_in_progress = true;
return iwl_send_cmd_pdu(priv, REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd);
}
/**
* 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(struct iwl_priv *priv)
{
s32 temperature;
s32 vt;
s32 R1, R2, R3;
u32 R4;
if (test_bit(STATUS_TEMPERATURE, &priv->status) &&
(priv->_agn.statistics.flag &
STATISTICS_REPLY_FLG_HT40_MODE_MSK)) {
IWL_DEBUG_TEMP(priv, "Running HT40 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->_agn.statistics.
general.common.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, "Temperature unchanged\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;
iwl_tt_handler(priv);
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)
{
if ((IWL49_FIRST_AMPDU_QUEUE > txq_id) ||
(IWL49_FIRST_AMPDU_QUEUE +
priv->cfg->base_params->num_of_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 +
priv->cfg->base_params->num_of_ampdu_queues - 1);
return -EINVAL;
}
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);
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;
u16 ra_tid;
int ret;
if ((IWL49_FIRST_AMPDU_QUEUE > txq_id) ||
(IWL49_FIRST_AMPDU_QUEUE +
priv->cfg->base_params->num_of_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 +
priv->cfg->base_params->num_of_ampdu_queues - 1);
return -EINVAL;
}
ra_tid = BUILD_RAxTID(sta_id, tid);
/* Modify device's station table to Tx this TID */
ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
if (ret)
return ret;
spin_lock_irqsave(&priv->lock, flags);
/* 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);
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->sleep_tx_count = cmd->sleep_tx_count;
addsta->reserved1 = cpu_to_le16(0);
addsta->reserved2 = cpu_to_le16(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);
info->status.rates[0].count = tx_resp->failure_frame + 1;
info->flags &= ~IEEE80211_TX_CTL_AMPDU;
info->flags |= iwl_tx_status_to_mac80211(status);
iwlagn_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);
if (!hdr) {
IWL_ERR(priv,
"BUG_ON idx doesn't point to valid skb"
" idx=%d, txq_id=%d\n", idx, txq_id);
return -1;
}
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;
}
static u8 iwl_find_station(struct iwl_priv *priv, const u8 *addr)
{
int i;
int start = 0;
int ret = IWL_INVALID_STATION;
unsigned long flags;
if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) ||
(priv->iw_mode == NL80211_IFTYPE_AP))
start = IWL_STA_ID;
if (is_broadcast_ether_addr(addr))
return priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id;
spin_lock_irqsave(&priv->sta_lock, flags);
for (i = start; i < priv->hw_params.max_stations; i++)
if (priv->stations[i].used &&
(!compare_ether_addr(priv->stations[i].sta.sta.addr,
addr))) {
ret = i;
goto out;
}
IWL_DEBUG_ASSOC_LIMIT(priv, "can not find STA %pM total %d\n",
addr, priv->num_stations);
out:
/*
* It may be possible that more commands interacting with stations
* arrive before we completed processing the adding of
* station
*/
if (ret != IWL_INVALID_STATION &&
(!(priv->stations[ret].used & IWL_STA_UCODE_ACTIVE) ||
((priv->stations[ret].used & IWL_STA_UCODE_ACTIVE) &&
(priv->stations[ret].used & IWL_STA_UCODE_INPROGRESS)))) {
IWL_ERR(priv, "Requested station info for sta %d before ready.\n",
ret);
ret = IWL_INVALID_STATION;
}
spin_unlock_irqrestore(&priv->sta_lock, flags);
return ret;
}
static int iwl_get_ra_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
{
if (priv->iw_mode == NL80211_IFTYPE_STATION) {
return IWL_AP_ID;
} else {
u8 *da = ieee80211_get_DA(hdr);
return iwl_find_station(priv, da);
}
}
/**
* 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 = rxb_addr(rxb);
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 uninitialized_var(tid);
int sta_id;
int freed;
u8 *qc = NULL;
unsigned long flags;
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);
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;
}
spin_lock_irqsave(&priv->sta_lock, flags);
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 = iwlagn_tx_queue_reclaim(priv, txq_id, index);
if (qc)
iwl_free_tfds_in_queue(priv, sta_id,
tid, 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_tx_status_to_mac80211(status);
iwlagn_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 = iwlagn_tx_queue_reclaim(priv, txq_id, index);
if (qc && likely(sta_id != IWL_INVALID_STATION))
iwl_free_tfds_in_queue(priv, sta_id, tid, freed);
else if (sta_id == IWL_INVALID_STATION)
IWL_DEBUG_TX_REPLY(priv, "Station not known\n");
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))
iwlagn_txq_check_empty(priv, sta_id, tid, txq_id);
iwl_check_abort_status(priv, tx_resp->frame_count, status);
spin_unlock_irqrestore(&priv->sta_lock, flags);
}
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 - IWLAGN_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] = iwlagn_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,
.commit_rxon = iwlagn_commit_rxon,
.set_rxon_chain = iwlagn_set_rxon_chain,
.send_bt_config = iwl_send_bt_config,
};
static void iwl4965_post_scan(struct iwl_priv *priv)
{
struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
/*
* Since setting the RXON may have been deferred while
* performing the scan, fire one off if needed
*/
if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
iwlcore_commit_rxon(priv, ctx);
}
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,
.tx_cmd_protection = iwlcore_tx_cmd_protection,
.calc_rssi = iwl4965_calc_rssi,
.request_scan = iwlagn_request_scan,
.post_scan = iwl4965_post_scan,
};
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,
.dump_nic_event_log = iwl_dump_nic_event_log,
.dump_nic_error_log = iwl_dump_nic_error_log,
.dump_fh = iwl_dump_fh,
.set_channel_switch = iwl4965_hw_channel_switch,
.apm_ops = {
.init = iwl_apm_init,
.config = iwl4965_nic_config,
},
.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_HT40_CHANNELS,
EEPROM_4965_REGULATORY_BAND_52_HT40_CHANNELS
},
.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,
.post_associate = iwl_post_associate,
.config_ap = iwl_config_ap,
.isr = iwl_isr_legacy,
.temp_ops = {
.temperature = iwl4965_temperature_calib,
},
.manage_ibss_station = iwlagn_manage_ibss_station,
.update_bcast_stations = iwl_update_bcast_stations,
.debugfs_ops = {
.rx_stats_read = iwl_ucode_rx_stats_read,
.tx_stats_read = iwl_ucode_tx_stats_read,
.general_stats_read = iwl_ucode_general_stats_read,
.bt_stats_read = iwl_ucode_bt_stats_read,
.reply_tx_error = iwl_reply_tx_error_read,
},
.recover_from_tx_stall = iwl_bg_monitor_recover,
.check_plcp_health = iwl_good_plcp_health,
};
static const struct iwl_ops iwl4965_ops = {
.lib = &iwl4965_lib,
.hcmd = &iwl4965_hcmd,
.utils = &iwl4965_hcmd_utils,
.led = &iwlagn_led_ops,
};
static struct iwl_base_params iwl4965_base_params = {
.eeprom_size = IWL4965_EEPROM_IMG_SIZE,
.num_of_queues = IWL49_NUM_QUEUES,
.num_of_ampdu_queues = IWL49_NUM_AMPDU_QUEUES,
.pll_cfg_val = 0,
.set_l0s = true,
.use_bsm = true,
.use_isr_legacy = true,
.broken_powersave = true,
.led_compensation = 61,
.chain_noise_num_beacons = IWL4965_CAL_NUM_BEACONS,
.plcp_delta_threshold = IWL_MAX_PLCP_ERR_THRESHOLD_DEF,
.monitor_recover_period = IWL_DEF_MONITORING_PERIOD,
.temperature_kelvin = true,
.max_event_log_size = 512,
.tx_power_by_driver = true,
.ucode_tracing = true,
.sensitivity_calib_by_driver = true,
.chain_noise_calib_by_driver = true,
};
struct iwl_cfg iwl4965_agn_cfg = {
.name = "Intel(R) Wireless WiFi Link 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,
.valid_tx_ant = ANT_AB,
.valid_rx_ant = ANT_ABC,
.eeprom_ver = EEPROM_4965_EEPROM_VERSION,
.eeprom_calib_ver = EEPROM_4965_TX_POWER_VERSION,
.ops = &iwl4965_ops,
.mod_params = &iwlagn_mod_params,
.base_params = &iwl4965_base_params,
/*
* Force use of chains B and C for scan RX on 5 GHz band
* because the device has off-channel reception on chain A.
*/
.scan_rx_antennas[IEEE80211_BAND_5GHZ] = ANT_BC,
};
/* Module firmware */
MODULE_FIRMWARE(IWL4965_MODULE_FIRMWARE(IWL4965_UCODE_API_MAX));