diff options
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-4965.c')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-4965.c | 4719 |
1 files changed, 4719 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-4965.c b/drivers/net/wireless/iwlwifi/iwl-4965.c new file mode 100644 index 00000000000..ba35b3ac7c7 --- /dev/null +++ b/drivers/net/wireless/iwlwifi/iwl-4965.c @@ -0,0 +1,4719 @@ +/****************************************************************************** + * + * Copyright(c) 2003 - 2007 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: + * James P. Ketrenos <ipw2100-admin@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/version.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/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/delay.h> + +#include "iwlwifi.h" +#include "iwl-4965.h" +#include "iwl-helpers.h" + +#define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np) \ + [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP, \ + IWL_RATE_SISO_##s##M_PLCP, \ + IWL_RATE_MIMO_##s##M_PLCP, \ + IWL_RATE_##r##M_IEEE, \ + IWL_RATE_##ip##M_INDEX, \ + IWL_RATE_##in##M_INDEX, \ + IWL_RATE_##rp##M_INDEX, \ + IWL_RATE_##rn##M_INDEX, \ + IWL_RATE_##pp##M_INDEX, \ + IWL_RATE_##np##M_INDEX } + +/* + * Parameter order: + * rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate + * + * If there isn't a valid next or previous rate then INV is used which + * maps to IWL_RATE_INVALID + * + */ +const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = { + IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2), /* 1mbps */ + IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5), /* 2mbps */ + IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11), /*5.5mbps */ + IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18), /* 11mbps */ + IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11), /* 6mbps */ + IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11), /* 9mbps */ + IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18), /* 12mbps */ + IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24), /* 18mbps */ + IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36), /* 24mbps */ + IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48), /* 36mbps */ + IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54), /* 48mbps */ + IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */ + IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */ +}; + +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); +} + +static u8 is_single_stream(struct iwl_priv *priv) +{ +#ifdef CONFIG_IWLWIFI_HT + if (!priv->is_ht_enabled || !priv->current_assoc_ht.is_ht || + (priv->active_rate_ht[1] == 0) || + (priv->ps_mode == IWL_MIMO_PS_STATIC)) + return 1; +#else + return 1; +#endif /*CONFIG_IWLWIFI_HT */ + return 0; +} + +/* + * Determine how many receiver/antenna chains to use. + * More provides better reception via diversity. Fewer saves power. + * MIMO (dual stream) requires at least 2, but works better with 3. + * This does not determine *which* chains to use, just how many. + */ +static int iwl4965_get_rx_chain_counter(struct iwl_priv *priv, + u8 *idle_state, u8 *rx_state) +{ + u8 is_single = is_single_stream(priv); + u8 is_cam = test_bit(STATUS_POWER_PMI, &priv->status) ? 0 : 1; + + /* # of Rx chains to use when expecting MIMO. */ + if (is_single || (!is_cam && (priv->ps_mode == IWL_MIMO_PS_STATIC))) + *rx_state = 2; + else + *rx_state = 3; + + /* # Rx chains when idling and maybe trying to save power */ + switch (priv->ps_mode) { + case IWL_MIMO_PS_STATIC: + case IWL_MIMO_PS_DYNAMIC: + *idle_state = (is_cam) ? 2 : 1; + break; + case IWL_MIMO_PS_NONE: + *idle_state = (is_cam) ? *rx_state : 1; + break; + default: + *idle_state = 1; + break; + } + + return 0; +} + +int iwl_hw_rxq_stop(struct iwl_priv *priv) +{ + int rc; + unsigned long flags; + + spin_lock_irqsave(&priv->lock, flags); + rc = iwl_grab_restricted_access(priv); + if (rc) { + spin_unlock_irqrestore(&priv->lock, flags); + return rc; + } + + /* stop HW */ + iwl_write_restricted(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0); + rc = iwl_poll_restricted_bit(priv, FH_MEM_RSSR_RX_STATUS_REG, + (1 << 24), 1000); + if (rc < 0) + IWL_ERROR("Can't stop Rx DMA.\n"); + + iwl_release_restricted_access(priv); + spin_unlock_irqrestore(&priv->lock, flags); + + return 0; +} + +u8 iwl_hw_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 == IEEE80211_IF_TYPE_IBSS) || + (priv->iw_mode == IEEE80211_IF_TYPE_AP)) + start = IWL_STA_ID; + + if (is_broadcast_ether_addr(addr)) + return IWL4965_BROADCAST_ID; + + spin_lock_irqsave(&priv->sta_lock, flags); + for (i = start; i < priv->hw_setting.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("can not find STA " MAC_FMT " total %d\n", + MAC_ARG(addr), priv->num_stations); + + out: + spin_unlock_irqrestore(&priv->sta_lock, flags); + return ret; +} + +static int iwl4965_nic_set_pwr_src(struct iwl_priv *priv, int pwr_max) +{ + int rc = 0; + unsigned long flags; + + spin_lock_irqsave(&priv->lock, flags); + rc = iwl_grab_restricted_access(priv); + if (rc) { + spin_unlock_irqrestore(&priv->lock, flags); + return rc; + } + + if (!pwr_max) { + u32 val; + + rc = pci_read_config_dword(priv->pci_dev, PCI_POWER_SOURCE, + &val); + + if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT) + iwl_set_bits_mask_restricted_reg( + priv, APMG_PS_CTRL_REG, + APMG_PS_CTRL_VAL_PWR_SRC_VAUX, + ~APMG_PS_CTRL_MSK_PWR_SRC); + } else + iwl_set_bits_mask_restricted_reg( + priv, APMG_PS_CTRL_REG, + APMG_PS_CTRL_VAL_PWR_SRC_VMAIN, + ~APMG_PS_CTRL_MSK_PWR_SRC); + + iwl_release_restricted_access(priv); + spin_unlock_irqrestore(&priv->lock, flags); + + return rc; +} + +static int iwl4965_rx_init(struct iwl_priv *priv, struct iwl_rx_queue *rxq) +{ + int rc; + unsigned long flags; + + spin_lock_irqsave(&priv->lock, flags); + rc = iwl_grab_restricted_access(priv); + if (rc) { + spin_unlock_irqrestore(&priv->lock, flags); + return rc; + } + + /* stop HW */ + iwl_write_restricted(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0); + + iwl_write_restricted(priv, FH_RSCSR_CHNL0_RBDCB_WPTR_REG, 0); + iwl_write_restricted(priv, FH_RSCSR_CHNL0_RBDCB_BASE_REG, + rxq->dma_addr >> 8); + + iwl_write_restricted(priv, FH_RSCSR_CHNL0_STTS_WPTR_REG, + (priv->hw_setting.shared_phys + + offsetof(struct iwl_shared, val0)) >> 4); + + iwl_write_restricted(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, + FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL | + FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL | + IWL_FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K | + /*0x10 << 4 | */ + (RX_QUEUE_SIZE_LOG << + FH_RCSR_RX_CONFIG_RBDCB_SIZE_BITSHIFT)); + + /* + * iwl_write32(priv,CSR_INT_COAL_REG,0); + */ + + iwl_release_restricted_access(priv); + spin_unlock_irqrestore(&priv->lock, flags); + + return 0; +} + +static int iwl4965_kw_init(struct iwl_priv *priv) +{ + unsigned long flags; + int rc; + + spin_lock_irqsave(&priv->lock, flags); + rc = iwl_grab_restricted_access(priv); + if (rc) + goto out; + + iwl_write_restricted(priv, IWL_FH_KW_MEM_ADDR_REG, + priv->kw.dma_addr >> 4); + iwl_release_restricted_access(priv); +out: + spin_unlock_irqrestore(&priv->lock, flags); + return rc; +} + +static int iwl4965_kw_alloc(struct iwl_priv *priv) +{ + struct pci_dev *dev = priv->pci_dev; + struct iwl_kw *kw = &priv->kw; + + kw->size = IWL4965_KW_SIZE; /* TBW need set somewhere else */ + kw->v_addr = pci_alloc_consistent(dev, kw->size, &kw->dma_addr); + if (!kw->v_addr) + return -ENOMEM; + + return 0; +} + +#define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \ + ? # x " " : "") + +int iwl4965_set_fat_chan_info(struct iwl_priv *priv, int phymode, u16 channel, + const struct iwl_eeprom_channel *eeprom_ch, + u8 fat_extension_channel) +{ + struct iwl_channel_info *ch_info; + + ch_info = (struct iwl_channel_info *) + iwl_get_channel_info(priv, phymode, channel); + + if (!is_channel_valid(ch_info)) + return -1; + + IWL_DEBUG_INFO("FAT Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x" + " %ddBm): Ad-Hoc %ssupported\n", + ch_info->channel, + is_channel_a_band(ch_info) ? + "5.2" : "2.4", + CHECK_AND_PRINT(IBSS), + CHECK_AND_PRINT(ACTIVE), + CHECK_AND_PRINT(RADAR), + CHECK_AND_PRINT(WIDE), + CHECK_AND_PRINT(NARROW), + CHECK_AND_PRINT(DFS), + eeprom_ch->flags, + eeprom_ch->max_power_avg, + ((eeprom_ch->flags & EEPROM_CHANNEL_IBSS) + && !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ? + "" : "not "); + + ch_info->fat_eeprom = *eeprom_ch; + ch_info->fat_max_power_avg = eeprom_ch->max_power_avg; + ch_info->fat_curr_txpow = eeprom_ch->max_power_avg; + ch_info->fat_min_power = 0; + ch_info->fat_scan_power = eeprom_ch->max_power_avg; + ch_info->fat_flags = eeprom_ch->flags; + ch_info->fat_extension_channel = fat_extension_channel; + + return 0; +} + +static void iwl4965_kw_free(struct iwl_priv *priv) +{ + struct pci_dev *dev = priv->pci_dev; + struct iwl_kw *kw = &priv->kw; + + if (kw->v_addr) { + pci_free_consistent(dev, kw->size, kw->v_addr, kw->dma_addr); + memset(kw, 0, sizeof(*kw)); + } +} + +/** + * iwl4965_txq_ctx_reset - Reset TX queue context + * Destroys all DMA structures and initialise them again + * + * @param priv + * @return error code + */ +static int iwl4965_txq_ctx_reset(struct iwl_priv *priv) +{ + int rc = 0; + int txq_id, slots_num; + unsigned long flags; + + iwl4965_kw_free(priv); + + iwl_hw_txq_ctx_free(priv); + + /* Tx CMD queue */ + rc = iwl4965_kw_alloc(priv); + if (rc) { + IWL_ERROR("Keep Warm allocation failed"); + goto error_kw; + } + + spin_lock_irqsave(&priv->lock, flags); + + rc = iwl_grab_restricted_access(priv); + if (unlikely(rc)) { + IWL_ERROR("TX reset failed"); + spin_unlock_irqrestore(&priv->lock, flags); + goto error_reset; + } + + iwl_write_restricted_reg(priv, SCD_TXFACT, 0); + iwl_release_restricted_access(priv); + spin_unlock_irqrestore(&priv->lock, flags); + + rc = iwl4965_kw_init(priv); + if (rc) { + IWL_ERROR("kw_init failed\n"); + goto error_reset; + } + + /* Tx queue(s) */ + for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++) { + slots_num = (txq_id == IWL_CMD_QUEUE_NUM) ? + TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS; + rc = iwl_tx_queue_init(priv, &priv->txq[txq_id], slots_num, + txq_id); + if (rc) { + IWL_ERROR("Tx %d queue init failed\n", txq_id); + goto error; + } + } + + return rc; + + error: + iwl_hw_txq_ctx_free(priv); + error_reset: + iwl4965_kw_free(priv); + error_kw: + return rc; +} + +int iwl_hw_nic_init(struct iwl_priv *priv) +{ + int rc; + unsigned long flags; + struct iwl_rx_queue *rxq = &priv->rxq; + u8 rev_id; + u32 val; + u8 val_link; + + iwl_power_init_handle(priv); + + /* nic_init */ + spin_lock_irqsave(&priv->lock, flags); + + iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS, + CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER); + + iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE); + rc = iwl_poll_bit(priv, CSR_GP_CNTRL, + CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, + CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000); + if (rc < 0) { + spin_unlock_irqrestore(&priv->lock, flags); + IWL_DEBUG_INFO("Failed to init the card\n"); + return rc; + } + + rc = iwl_grab_restricted_access(priv); + if (rc) { + spin_unlock_irqrestore(&priv->lock, flags); + return rc; + } + + iwl_read_restricted_reg(priv, APMG_CLK_CTRL_REG); + + iwl_write_restricted_reg(priv, APMG_CLK_CTRL_REG, + APMG_CLK_VAL_DMA_CLK_RQT | + APMG_CLK_VAL_BSM_CLK_RQT); + iwl_read_restricted_reg(priv, APMG_CLK_CTRL_REG); + + udelay(20); + + iwl_set_bits_restricted_reg(priv, APMG_PCIDEV_STT_REG, + APMG_PCIDEV_STT_VAL_L1_ACT_DIS); + + iwl_release_restricted_access(priv); + iwl_write32(priv, CSR_INT_COALESCING, 512 / 32); + spin_unlock_irqrestore(&priv->lock, flags); + + /* Determine HW type */ + rc = pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &rev_id); + if (rc) + return rc; + + IWL_DEBUG_INFO("HW Revision ID = 0x%X\n", rev_id); + + iwl4965_nic_set_pwr_src(priv, 1); + spin_lock_irqsave(&priv->lock, flags); + + if ((rev_id & 0x80) == 0x80 && (rev_id & 0x7f) < 8) { + pci_read_config_dword(priv->pci_dev, PCI_REG_WUM8, &val); + /* Enable No Snoop field */ + pci_write_config_dword(priv->pci_dev, PCI_REG_WUM8, + val & ~(1 << 11)); + } + + spin_unlock_irqrestore(&priv->lock, flags); + + /* Read the EEPROM */ + rc = iwl_eeprom_init(priv); + if (rc) + return rc; + + if (priv->eeprom.calib_version < EEPROM_TX_POWER_VERSION_NEW) { + IWL_ERROR("Older EEPROM detected! Aborting.\n"); + return -EINVAL; + } + + pci_read_config_byte(priv->pci_dev, PCI_LINK_CTRL, &val_link); + + /* disable L1 entry -- workaround for pre-B1 */ + pci_write_config_byte(priv->pci_dev, PCI_LINK_CTRL, val_link & ~0x02); + + spin_lock_irqsave(&priv->lock, flags); + + /* set CSR_HW_CONFIG_REG for uCode use */ + + iwl_set_bit(priv, CSR_SW_VER, CSR_HW_IF_CONFIG_REG_BIT_KEDRON_R | + CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI | + CSR_HW_IF_CONFIG_REG_BIT_MAC_SI); + + rc = iwl_grab_restricted_access(priv); + if (rc < 0) { + spin_unlock_irqrestore(&priv->lock, flags); + IWL_DEBUG_INFO("Failed to init the card\n"); + return rc; + } + + iwl_read_restricted_reg(priv, APMG_PS_CTRL_REG); + iwl_set_bits_restricted_reg(priv, APMG_PS_CTRL_REG, + APMG_PS_CTRL_VAL_RESET_REQ); + udelay(5); + iwl_clear_bits_restricted_reg(priv, APMG_PS_CTRL_REG, + APMG_PS_CTRL_VAL_RESET_REQ); + + iwl_release_restricted_access(priv); + spin_unlock_irqrestore(&priv->lock, flags); + + iwl_hw_card_show_info(priv); + + /* end nic_init */ + + /* Allocate the RX queue, or reset if it is already allocated */ + if (!rxq->bd) { + rc = iwl_rx_queue_alloc(priv); + if (rc) { + IWL_ERROR("Unable to initialize Rx queue\n"); + return -ENOMEM; + } + } else + iwl_rx_queue_reset(priv, rxq); + + iwl_rx_replenish(priv); + + iwl4965_rx_init(priv, rxq); + + spin_lock_irqsave(&priv->lock, flags); + + rxq->need_update = 1; + iwl_rx_queue_update_write_ptr(priv, rxq); + + spin_unlock_irqrestore(&priv->lock, flags); + rc = iwl4965_txq_ctx_reset(priv); + if (rc) + return rc; + + if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_SW_RF_KILL_ENABLE) + IWL_DEBUG_RF_KILL("SW RF KILL supported in EEPROM.\n"); + + if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_HW_RF_KILL_ENABLE) + IWL_DEBUG_RF_KILL("HW RF KILL supported in EEPROM.\n"); + + set_bit(STATUS_INIT, &priv->status); + + return 0; +} + +int iwl_hw_nic_stop_master(struct iwl_priv *priv) +{ + int rc = 0; + u32 reg_val; + 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); + + reg_val = iwl_read32(priv, CSR_GP_CNTRL); + + if (CSR_GP_CNTRL_REG_FLAG_MAC_POWER_SAVE == + (reg_val & CSR_GP_CNTRL_REG_MSK_POWER_SAVE_TYPE)) + IWL_DEBUG_INFO("Card in power save, master is already " + "stopped\n"); + else { + rc = iwl_poll_bit(priv, CSR_RESET, + CSR_RESET_REG_FLAG_MASTER_DISABLED, + CSR_RESET_REG_FLAG_MASTER_DISABLED, 100); + if (rc < 0) { + spin_unlock_irqrestore(&priv->lock, flags); + return rc; + } + } + + spin_unlock_irqrestore(&priv->lock, flags); + IWL_DEBUG_INFO("stop master\n"); + + return rc; +} + +void iwl_hw_txq_ctx_stop(struct iwl_priv *priv) +{ + + int txq_id; + unsigned long flags; + + /* reset TFD queues */ + for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++) { + spin_lock_irqsave(&priv->lock, flags); + if (iwl_grab_restricted_access(priv)) { + spin_unlock_irqrestore(&priv->lock, flags); + continue; + } + + iwl_write_restricted(priv, + IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id), + 0x0); + iwl_poll_restricted_bit(priv, IWL_FH_TSSR_TX_STATUS_REG, + IWL_FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE + (txq_id), 200); + iwl_release_restricted_access(priv); + spin_unlock_irqrestore(&priv->lock, flags); + } + + iwl_hw_txq_ctx_free(priv); +} + +int iwl_hw_nic_reset(struct iwl_priv *priv) +{ + int rc = 0; + unsigned long flags; + + iwl_hw_nic_stop_master(priv); + + spin_lock_irqsave(&priv->lock, flags); + + iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET); + + udelay(10); + + iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE); + rc = iwl_poll_bit(priv, CSR_RESET, + CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, + CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25); + + udelay(10); + + rc = iwl_grab_restricted_access(priv); + if (!rc) { + iwl_write_restricted_reg(priv, APMG_CLK_EN_REG, + APMG_CLK_VAL_DMA_CLK_RQT | + APMG_CLK_VAL_BSM_CLK_RQT); + + udelay(10); + + iwl_set_bits_restricted_reg(priv, APMG_PCIDEV_STT_REG, + APMG_PCIDEV_STT_VAL_L1_ACT_DIS); + + iwl_release_restricted_access(priv); + } + + clear_bit(STATUS_HCMD_ACTIVE, &priv->status); + wake_up_interruptible(&priv->wait_command_queue); + + spin_unlock_irqrestore(&priv->lock, flags); + + return rc; + +} + +#define REG_RECALIB_PERIOD (60) + +/** + * iwl4965_bg_statistics_periodic - Timer callback to queue statistics + * + * This callback is provided in order to queue the statistics_work + * in work_queue context (v. softirq) + * + * This timer function is continually reset to execute within + * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION + * was received. We need to ensure we receive the statistics in order + * to update the temperature used for calibrating the TXPOWER. However, + * we can't send the statistics command from softirq context (which + * is the context which timers run at) so we have to queue off the + * statistics_work to actually send the command to the hardware. + */ +static void iwl4965_bg_statistics_periodic(unsigned long data) +{ + struct iwl_priv *priv = (struct iwl_priv *)data; + + queue_work(priv->workqueue, &priv->statistics_work); +} + +/** + * iwl4965_bg_statistics_work - Send the statistics request to the hardware. + * + * This is queued by iwl_bg_statistics_periodic. + */ +static void iwl4965_bg_statistics_work(struct work_struct *work) +{ + struct iwl_priv *priv = container_of(work, struct iwl_priv, + statistics_work); + + if (test_bit(STATUS_EXIT_PENDING, &priv->status)) + return; + + mutex_lock(&priv->mutex); + iwl_send_statistics_request(priv); + mutex_unlock(&priv->mutex); +} + +#define CT_LIMIT_CONST 259 +#define TM_CT_KILL_THRESHOLD 110 + +void iwl4965_rf_kill_ct_config(struct iwl_priv *priv) +{ + struct iwl_ct_kill_config cmd; + u32 R1, R2, R3; + u32 temp_th; + u32 crit_temperature; + unsigned long flags; + int rc = 0; + + spin_lock_irqsave(&priv->lock, flags); + iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, + CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT); + spin_unlock_irqrestore(&priv->lock, flags); + + if (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK) { + 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]); + } else { + 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]); + } + + temp_th = CELSIUS_TO_KELVIN(TM_CT_KILL_THRESHOLD); + + crit_temperature = ((temp_th * (R3-R1))/CT_LIMIT_CONST) + R2; + cmd.critical_temperature_R = cpu_to_le32(crit_temperature); + rc = iwl_send_cmd_pdu(priv, + REPLY_CT_KILL_CONFIG_CMD, sizeof(cmd), &cmd); + if (rc) + IWL_ERROR("REPLY_CT_KILL_CONFIG_CMD failed\n"); + else + IWL_DEBUG_INFO("REPLY_CT_KILL_CONFIG_CMD succeeded\n"); +} + +#ifdef CONFIG_IWLWIFI_SENSITIVITY + +/* "false alarms" are signals that our DSP tries to lock onto, + * but then determines that they are either noise, or transmissions + * from a distant wireless network (also "noise", really) that get + * "stepped on" by stronger transmissions within our own network. + * This algorithm attempts to set a sensitivity level that is high + * enough to receive all of our own network traffic, but not so + * high that our DSP gets too busy trying to lock onto non-network + * activity/noise. */ +static int iwl4965_sens_energy_cck(struct iwl_priv *priv, + u32 norm_fa, + u32 rx_enable_time, + struct statistics_general_data *rx_info) +{ + u32 max_nrg_cck = 0; + int i = 0; + u8 max_silence_rssi = 0; + u32 silence_ref = 0; + u8 silence_rssi_a = 0; + u8 silence_rssi_b = 0; + u8 silence_rssi_c = 0; + u32 val; + + /* "false_alarms" values below are cross-multiplications to assess the + * numbers of false alarms within the measured period of actual Rx + * (Rx is off when we're txing), vs the min/max expected false alarms + * (some should be expected if rx is sensitive enough) in a + * hypothetical listening period of 200 time units (TU), 204.8 msec: + * + * MIN_FA/fixed-time < false_alarms/actual-rx-time < MAX_FA/beacon-time + * + * */ + u32 false_alarms = norm_fa * 200 * 1024; + u32 max_false_alarms = MAX_FA_CCK * rx_enable_time; + u32 min_false_alarms = MIN_FA_CCK * rx_enable_time; + struct iwl_sensitivity_data *data = NULL; + + data = &(priv->sensitivity_data); + + data->nrg_auto_corr_silence_diff = 0; + + /* Find max silence rssi among all 3 receivers. + * This is background noise, which may include transmissions from other + * networks, measured during silence before our network's beacon */ + silence_rssi_a = (u8)((rx_info->beacon_silence_rssi_a & + ALL_BAND_FILTER)>>8); + silence_rssi_b = (u8)((rx_info->beacon_silence_rssi_b & + ALL_BAND_FILTER)>>8); + silence_rssi_c = (u8)((rx_info->beacon_silence_rssi_c & + ALL_BAND_FILTER)>>8); + + val = max(silence_rssi_b, silence_rssi_c); + max_silence_rssi = max(silence_rssi_a, (u8) val); + + /* Store silence rssi in 20-beacon history table */ + data->nrg_silence_rssi[data->nrg_silence_idx] = max_silence_rssi; + data->nrg_silence_idx++; + if (data->nrg_silence_idx >= NRG_NUM_PREV_STAT_L) + data->nrg_silence_idx = 0; + + /* Find max silence rssi across 20 beacon history */ + for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) { + val = data->nrg_silence_rssi[i]; + silence_ref = max(silence_ref, val); + } + IWL_DEBUG_CALIB("silence a %u, b %u, c %u, 20-bcn max %u\n", + silence_rssi_a, silence_rssi_b, silence_rssi_c, + silence_ref); + + /* Find max rx energy (min value!) among all 3 receivers, + * measured during beacon frame. + * Save it in 10-beacon history table. */ + i = data->nrg_energy_idx; + val = min(rx_info->beacon_energy_b, rx_info->beacon_energy_c); + data->nrg_value[i] = min(rx_info->beacon_energy_a, val); + + data->nrg_energy_idx++; + if (data->nrg_energy_idx >= 10) + data->nrg_energy_idx = 0; + + /* Find min rx energy (max value) across 10 beacon history. + * This is the minimum signal level that we want to receive well. + * Add backoff (margin so we don't miss slightly lower energy frames). + * This establishes an upper bound (min value) for energy threshold. */ + max_nrg_cck = data->nrg_value[0]; + for (i = 1; i < 10; i++) + max_nrg_cck = (u32) max(max_nrg_cck, (data->nrg_value[i])); + max_nrg_cck += 6; + + IWL_DEBUG_CALIB("rx energy a %u, b %u, c %u, 10-bcn max/min %u\n", + rx_info->beacon_energy_a, rx_info->beacon_energy_b, + rx_info->beacon_energy_c, max_nrg_cck - 6); + + /* Count number of consecutive beacons with fewer-than-desired + * false alarms. */ + if (false_alarms < min_false_alarms) + data->num_in_cck_no_fa++; + else + data->num_in_cck_no_fa = 0; + IWL_DEBUG_CALIB("consecutive bcns with few false alarms = %u\n", + data->num_in_cck_no_fa); + + /* If we got too many false alarms this time, reduce sensitivity */ + if (false_alarms > max_false_alarms) { + IWL_DEBUG_CALIB("norm FA %u > max FA %u\n", + false_alarms, max_false_alarms); + IWL_DEBUG_CALIB("... reducing sensitivity\n"); + data->nrg_curr_state = IWL_FA_TOO_MANY; + + if (data->auto_corr_cck > AUTO_CORR_MAX_TH_CCK) { + /* Store for "fewer than desired" on later beacon */ + data->nrg_silence_ref = silence_ref; + + /* increase energy threshold (reduce nrg value) + * to decrease sensitivity */ + if (data->nrg_th_cck > (NRG_MAX_CCK + NRG_STEP_CCK)) + data->nrg_th_cck = data->nrg_th_cck + - NRG_STEP_CCK; + } + + /* increase auto_corr values to decrease sensitivity */ + if (data->auto_corr_cck < AUTO_CORR_MAX_TH_CCK) + data->auto_corr_cck = AUTO_CORR_MAX_TH_CCK + 1; + else { + val = data->auto_corr_cck + AUTO_CORR_STEP_CCK; + data->auto_corr_cck = min((u32)AUTO_CORR_MAX_CCK, val); + } + val = data->auto_corr_cck_mrc + AUTO_CORR_STEP_CCK; + data->auto_corr_cck_mrc = min((u32)AUTO_CORR_MAX_CCK_MRC, val); + + /* Else if we got fewer than desired, increase sensitivity */ + } else if (false_alarms < min_false_alarms) { + data->nrg_curr_state = IWL_FA_TOO_FEW; + + /* Compare silence level with silence level for most recent + * healthy number or too many false alarms */ + data->nrg_auto_corr_silence_diff = (s32)data->nrg_silence_ref - + (s32)silence_ref; + + IWL_DEBUG_CALIB("norm FA %u < min FA %u, silence diff %d\n", + false_alarms, min_false_alarms, + data->nrg_auto_corr_silence_diff); + + /* Increase value to increase sensitivity, but only if: + * 1a) previous beacon did *not* have *too many* false alarms + * 1b) AND there's a significant difference in Rx levels + * from a previous beacon with too many, or healthy # FAs + * OR 2) We've seen a lot of beacons (100) with too few + * false alarms */ + if ((data->nrg_prev_state != IWL_FA_TOO_MANY) && + ((data->nrg_auto_corr_silence_diff > NRG_DIFF) || + (data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA))) { + + IWL_DEBUG_CALIB("... increasing sensitivity\n"); + /* Increase nrg value to increase sensitivity */ + val = data->nrg_th_cck + NRG_STEP_CCK; + data->nrg_th_cck = min((u32)NRG_MIN_CCK, val); + + /* Decrease auto_corr values to increase sensitivity */ + val = data->auto_corr_cck - AUTO_CORR_STEP_CCK; + data->auto_corr_cck = max((u32)AUTO_CORR_MIN_CCK, val); + + val = data->auto_corr_cck_mrc - AUTO_CORR_STEP_CCK; + data->auto_corr_cck_mrc = + max((u32)AUTO_CORR_MIN_CCK_MRC, val); + + } else + IWL_DEBUG_CALIB("... but not changing sensitivity\n"); + + /* Else we got a healthy number of false alarms, keep status quo */ + } else { + IWL_DEBUG_CALIB(" FA in safe zone\n"); + data->nrg_curr_state = IWL_FA_GOOD_RANGE; + + /* Store for use in "fewer than desired" with later beacon */ + data->nrg_silence_ref = silence_ref; + + /* If previous beacon had too many false alarms, + * give it some extra margin by reducing sensitivity again + * (but don't go below measured energy of desired Rx) */ + if (IWL_FA_TOO_MANY == data->nrg_prev_state) { + IWL_DEBUG_CALIB("... increasing margin\n"); + data->nrg_th_cck -= NRG_MARGIN; + } + } + + /* Make sure the energy threshold does not go above the measured + * energy of the desired Rx signals (reduced by backoff margin), + * or else we might start missing Rx frames. + * Lower value is higher energy, so we use max()! + */ + data->nrg_th_cck = max(max_nrg_cck, data->nrg_th_cck); + IWL_DEBUG_CALIB("new nrg_th_cck %u\n", data->nrg_th_cck); + + data->nrg_prev_state = data->nrg_curr_state; + + return 0; +} + + +static int iwl4965_sens_auto_corr_ofdm(struct iwl_priv *priv, + u32 norm_fa, + u32 rx_enable_time) +{ + u32 val; + u32 false_alarms = norm_fa * 200 * 1024; + u32 max_false_alarms = MAX_FA_OFDM * rx_enable_time; + u32 min_false_alarms = MIN_FA_OFDM * rx_enable_time; + struct iwl_sensitivity_data *data = NULL; + + data = &(priv->sensitivity_data); + + /* If we got too many false alarms this time, reduce sensitivity */ + if (false_alarms > max_false_alarms) { + + IWL_DEBUG_CALIB("norm FA %u > max FA %u)\n", + false_alarms, max_false_alarms); + + val = data->auto_corr_ofdm + AUTO_CORR_STEP_OFDM; + data->auto_corr_ofdm = + min((u32)AUTO_CORR_MAX_OFDM, val); + + val = data->auto_corr_ofdm_mrc + AUTO_CORR_STEP_OFDM; + data->auto_corr_ofdm_mrc = + min((u32)AUTO_CORR_MAX_OFDM_MRC, val); + + val = data->auto_corr_ofdm_x1 + AUTO_CORR_STEP_OFDM; + data->auto_corr_ofdm_x1 = + min((u32)AUTO_CORR_MAX_OFDM_X1, val); + + val = data->auto_corr_ofdm_mrc_x1 + AUTO_CORR_STEP_OFDM; + data->auto_corr_ofdm_mrc_x1 = + min((u32)AUTO_CORR_MAX_OFDM_MRC_X1, val); + } + + /* Else if we got fewer than desired, increase sensitivity */ + else if (false_alarms < min_false_alarms) { + + IWL_DEBUG_CALIB("norm FA %u < min FA %u\n", + false_alarms, min_false_alarms); + + val = data->auto_corr_ofdm - AUTO_CORR_STEP_OFDM; + data->auto_corr_ofdm = + max((u32)AUTO_CORR_MIN_OFDM, val); + + val = data->auto_corr_ofdm_mrc - AUTO_CORR_STEP_OFDM; + data->auto_corr_ofdm_mrc = + max((u32)AUTO_CORR_MIN_OFDM_MRC, val); + + val = data->auto_corr_ofdm_x1 - AUTO_CORR_STEP_OFDM; + data->auto_corr_ofdm_x1 = + max((u32)AUTO_CORR_MIN_OFDM_X1, val); + + val = data->auto_corr_ofdm_mrc_x1 - AUTO_CORR_STEP_OFDM; + data->auto_corr_ofdm_mrc_x1 = + max((u32)AUTO_CORR_MIN_OFDM_MRC_X1, val); + } + + else + IWL_DEBUG_CALIB("min FA %u < norm FA %u < max FA %u OK\n", + min_false_alarms, false_alarms, max_false_alarms); + + return 0; +} + +static int iwl_sensitivity_callback(struct iwl_priv *priv, + struct iwl_cmd *cmd, struct sk_buff *skb) +{ + /* We didn't cache the SKB; let the caller free it */ + return 1; +} + +/* Prepare a SENSITIVITY_CMD, send to uCode if values have changed */ +static int iwl4965_sensitivity_write(struct iwl_priv *priv, u8 flags) +{ + int rc = 0; + struct iwl_sensitivity_cmd cmd ; + struct iwl_sensitivity_data *data = NULL; + struct iwl_host_cmd cmd_out = { + .id = SENSITIVITY_CMD, + .len = sizeof(struct iwl_sensitivity_cmd), + .meta.flags = flags, + .data = &cmd, + }; + + data = &(priv->sensitivity_data); + + memset(&cmd, 0, sizeof(cmd)); + + cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_INDEX] = + cpu_to_le16((u16)data->auto_corr_ofdm); + cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_MRC_INDEX] = + cpu_to_le16((u16)data->auto_corr_ofdm_mrc); + cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_INDEX] = + cpu_to_le16((u16)data->auto_corr_ofdm_x1); + cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_MRC_INDEX] = + cpu_to_le16((u16)data->auto_corr_ofdm_mrc_x1); + + cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_INDEX] = + cpu_to_le16((u16)data->auto_corr_cck); + cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_MRC_INDEX] = + cpu_to_le16((u16)data->auto_corr_cck_mrc); + + cmd.table[HD_MIN_ENERGY_CCK_DET_INDEX] = + cpu_to_le16((u16)data->nrg_th_cck); + cmd.table[HD_MIN_ENERGY_OFDM_DET_INDEX] = + cpu_to_le16((u16)data->nrg_th_ofdm); + + cmd.table[HD_BARKER_CORR_TH_ADD_MIN_INDEX] = + __constant_cpu_to_le16(190); + cmd.table[HD_BARKER_CORR_TH_ADD_MIN_MRC_INDEX] = + __constant_cpu_to_le16(390); + cmd.table[HD_OFDM_ENERGY_TH_IN_INDEX] = + __constant_cpu_to_le16(62); + + IWL_DEBUG_CALIB("ofdm: ac %u mrc %u x1 %u mrc_x1 %u thresh %u\n", + data->auto_corr_ofdm, data->auto_corr_ofdm_mrc, + data->auto_corr_ofdm_x1, data->auto_corr_ofdm_mrc_x1, + data->nrg_th_ofdm); + + IWL_DEBUG_CALIB("cck: ac %u mrc %u thresh %u\n", + data->auto_corr_cck, data->auto_corr_cck_mrc, + data->nrg_th_cck); + + cmd.control = SENSITIVITY_CMD_CONTROL_WORK_TABLE; + + if (flags & CMD_ASYNC) + cmd_out.meta.u.callback = iwl_sensitivity_callback; + + /* Don't send command to uCode if nothing has changed */ + if (!memcmp(&cmd.table[0], &(priv->sensitivity_tbl[0]), + sizeof(u16)*HD_TABLE_SIZE)) { + IWL_DEBUG_CALIB("No change in SENSITIVITY_CMD\n"); + return 0; + } + + /* Copy table for comparison next time */ + memcpy(&(priv->sensitivity_tbl[0]), &(cmd.table[0]), + sizeof(u16)*HD_TABLE_SIZE); + + rc = iwl_send_cmd(priv, &cmd_out); + if (!rc) { + IWL_DEBUG_CALIB("SENSITIVITY_CMD succeeded\n"); + return rc; + } + + return 0; +} + +void iwl4965_init_sensitivity(struct iwl_priv *priv, u8 flags, u8 force) +{ + int rc = 0; + int i; + struct iwl_sensitivity_data *data = NULL; + + IWL_DEBUG_CALIB("Start iwl4965_init_sensitivity\n"); + + if (force) + memset(&(priv->sensitivity_tbl[0]), 0, + sizeof(u16)*HD_TABLE_SIZE); + + /* Clear driver's sensitivity algo data */ + data = &(priv->sensitivity_data); + memset(data, 0, sizeof(struct iwl_sensitivity_data)); + + data->num_in_cck_no_fa = 0; + data->nrg_curr_state = IWL_FA_TOO_MANY; + data->nrg_prev_state = IWL_FA_TOO_MANY; + data->nrg_silence_ref = 0; + data->nrg_silence_idx = 0; + data->nrg_energy_idx = 0; + + for (i = 0; i < 10; i++) + data->nrg_value[i] = 0; + + for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) + data->nrg_silence_rssi[i] = 0; + + data->auto_corr_ofdm = 90; + data->auto_corr_ofdm_mrc = 170; + data->auto_corr_ofdm_x1 = 105; + data->auto_corr_ofdm_mrc_x1 = 220; + data->auto_corr_cck = AUTO_CORR_CCK_MIN_VAL_DEF; + data->auto_corr_cck_mrc = 200; + data->nrg_th_cck = 100; + data->nrg_th_ofdm = 100; + + data->last_bad_plcp_cnt_ofdm = 0; + data->last_fa_cnt_ofdm = 0; + data->last_bad_plcp_cnt_cck = 0; + data->last_fa_cnt_cck = 0; + + /* Clear prior Sensitivity command data to force send to uCode */ + if (force) + memset(&(priv->sensitivity_tbl[0]), 0, + sizeof(u16)*HD_TABLE_SIZE); + + rc |= iwl4965_sensitivity_write(priv, flags); + IWL_DEBUG_CALIB("<<return 0x%X\n", rc); + + return; +} + + +/* 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. */ +void iwl4965_chain_noise_reset(struct iwl_priv *priv) +{ + struct iwl_chain_noise_data *data = NULL; + int rc = 0; + + data = &(priv->chain_noise_data); + if ((data->state == IWL_CHAIN_NOISE_ALIVE) && iwl_is_associated(priv)) { + struct iwl_calibration_cmd cmd; + + memset(&cmd, 0, sizeof(cmd)); + cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD; + cmd.diff_gain_a = 0; + cmd.diff_gain_b = 0; + cmd.diff_gain_c = 0; + rc = iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD, + sizeof(cmd), &cmd); + msleep(4); + data->state = IWL_CHAIN_NOISE_ACCUMULATE; + IWL_DEBUG_CALIB("Run chain_noise_calibrate\n"); + } + return; +} + +/* + * Accumulate 20 beacons of signal and noise statistics for each of + * 3 receivers/antennas/rx-chains, then figure out: + * 1) Which antennas are connected. + * 2) Differential rx gain settings to balance the 3 receivers. + */ +static void iwl4965_noise_calibration(struct iwl_priv *priv, + struct iwl_notif_statistics *stat_resp) +{ + struct iwl_chain_noise_data *data = NULL; + int rc = 0; + + u32 chain_noise_a; + u32 chain_noise_b; + u32 chain_noise_c; + u32 chain_sig_a; + u32 chain_sig_b; + u32 chain_sig_c; + u32 average_sig[NUM_RX_CHAINS] = {INITIALIZATION_VALUE}; + u32 average_noise[NUM_RX_CHAINS] = {INITIALIZATION_VALUE}; + u32 max_average_sig; + u16 max_average_sig_antenna_i; + u32 min_average_noise = MIN_AVERAGE_NOISE_MAX_VALUE; + u16 min_average_noise_antenna_i = INITIALIZATION_VALUE; + u16 i = 0; + u16 chan_num = INITIALIZATION_VALUE; + u32 band = INITIALIZATION_VALUE; + u32 active_chains = 0; + unsigned long flags; + struct statistics_rx_non_phy *rx_info = &(stat_resp->rx.general); + + data = &(priv->chain_noise_data); + + /* Accumulate just the first 20 beacons after the first association, + * then we're done forever. */ + if (data->state != IWL_CHAIN_NOISE_ACCUMULATE) { + if (data->state == IWL_CHAIN_NOISE_ALIVE) + IWL_DEBUG_CALIB("Wait for noise calib reset\n"); + return; + } + + spin_lock_irqsave(&priv->lock, flags); + if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) { + IWL_DEBUG_CALIB(" << Interference data unavailable\n"); + spin_unlock_irqrestore(&priv->lock, flags); + return; + } + + band = (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) ? 0 : 1; + chan_num = le16_to_cpu(priv->staging_rxon.channel); + + /* Make sure we accumulate data for just the associated channel + * (even if scanning). */ + if ((chan_num != (le32_to_cpu(stat_resp->flag) >> 16)) || + ((STATISTICS_REPLY_FLG_BAND_24G_MSK == + (stat_resp->flag & STATISTICS_REPLY_FLG_BAND_24G_MSK)) && band)) { + IWL_DEBUG_CALIB("Stats not from chan=%d, band=%d\n", + chan_num, band); + spin_unlock_irqrestore(&priv->lock, flags); + return; + } + + /* Accumulate beacon statistics values across 20 beacons */ + chain_noise_a = le32_to_cpu(rx_info->beacon_silence_rssi_a) & + IN_BAND_FILTER; + chain_noise_b = le32_to_cpu(rx_info->beacon_silence_rssi_b) & + IN_BAND_FILTER; + chain_noise_c = le32_to_cpu(rx_info->beacon_silence_rssi_c) & + IN_BAND_FILTER; + + chain_sig_a = le32_to_cpu(rx_info->beacon_rssi_a) & IN_BAND_FILTER; + chain_sig_b = le32_to_cpu(rx_info->beacon_rssi_b) & IN_BAND_FILTER; + chain_sig_c = le32_to_cpu(rx_info->beacon_rssi_c) & IN_BAND_FILTER; + + spin_unlock_irqrestore(&priv->lock, flags); + + data->beacon_count++; + + data->chain_noise_a = (chain_noise_a + data->chain_noise_a); + data->chain_noise_b = (chain_noise_b + data->chain_noise_b); + data->chain_noise_c = (chain_noise_c + data->chain_noise_c); + + data->chain_signal_a = (chain_sig_a + data->chain_signal_a); + data->chain_signal_b = (chain_sig_b + data->chain_signal_b); + data->chain_signal_c = (chain_sig_c + data->chain_signal_c); + + IWL_DEBUG_CALIB("chan=%d, band=%d, beacon=%d\n", chan_num, band, + data->beacon_count); + IWL_DEBUG_CALIB("chain_sig: a %d b %d c %d\n", + chain_sig_a, chain_sig_b, chain_sig_c); + IWL_DEBUG_CALIB("chain_noise: a %d b %d c %d\n", + chain_noise_a, chain_noise_b, chain_noise_c); + + /* If this is the 20th beacon, determine: + * 1) Disconnected antennas (using signal strengths) + * 2) Differential gain (using silence noise) to balance receivers */ + if (data->beacon_count == CAL_NUM_OF_BEACONS) { + + /* Analyze signal for disconnected antenna */ + average_sig[0] = (data->chain_signal_a) / CAL_NUM_OF_BEACONS; + average_sig[1] = (data->chain_signal_b) / CAL_NUM_OF_BEACONS; + average_sig[2] = (data->chain_signal_c) / CAL_NUM_OF_BEACONS; + + if (average_sig[0] >= average_sig[1]) { + max_average_sig = average_sig[0]; + max_average_sig_antenna_i = 0; + active_chains = (1 << max_average_sig_antenna_i); + } else { + max_average_sig = average_sig[1]; + max_average_sig_antenna_i = 1; + active_chains = (1 << max_average_sig_antenna_i); + } + + if (average_sig[2] >= max_average_sig) { + max_average_sig = average_sig[2]; + max_average_sig_antenna_i = 2; + active_chains = (1 << max_average_sig_antenna_i); + } + + IWL_DEBUG_CALIB("average_sig: a %d b %d c %d\n", + average_sig[0], average_sig[1], average_sig[2]); + IWL_DEBUG_CALIB("max_average_sig = %d, antenna %d\n", + max_average_sig, max_average_sig_antenna_i); + + /* Compare signal strengths for all 3 receivers. */ + for (i = 0; i < NUM_RX_CHAINS; i++) { + if (i != max_average_sig_antenna_i) { + s32 rssi_delta = (max_average_sig - + average_sig[i]); + + /* If signal is very weak, compared with + * strongest, mark it as disconnected. */ + if (rssi_delta > MAXIMUM_ALLOWED_PATHLOSS) + data->disconn_array[i] = 1; + else + active_chains |= (1 << i); + IWL_DEBUG_CALIB("i = %d rssiDelta = %d " + "disconn_array[i] = %d\n", + i, rssi_delta, data->disconn_array[i]); + } + } + + /*If both chains A & B are disconnected - + * connect B and leave A as is */ + if (data->disconn_array[CHAIN_A] && + data->disconn_array[CHAIN_B]) { + data->disconn_array[CHAIN_B] = 0; + active_chains |= (1 << CHAIN_B); + IWL_DEBUG_CALIB("both A & B chains are disconnected! " + "W/A - declare B as connected\n"); + } + + IWL_DEBUG_CALIB("active_chains (bitwise) = 0x%x\n", + active_chains); + + /* Save for use within RXON, TX, SCAN commands, etc. */ + priv->valid_antenna = active_chains; + + /* Analyze noise for rx balance */ + average_noise[0] = ((data->chain_noise_a)/CAL_NUM_OF_BEACONS); + average_noise[1] = ((data->chain_noise_b)/CAL_NUM_OF_BEACONS); + average_noise[2] = ((data->chain_noise_c)/CAL_NUM_OF_BEACONS); + + for (i = 0; i < NUM_RX_CHAINS; i++) { + if (!(data->disconn_array[i]) && + (average_noise[i] <= min_average_noise)) { + /* This means that chain i is active and has + * lower noise values so far: */ + min_average_noise = average_noise[i]; + min_average_noise_antenna_i = i; + } + } + + data->delta_gain_code[min_average_noise_antenna_i] = 0; + + IWL_DEBUG_CALIB("average_noise: a %d b %d c %d\n", + average_noise[0], average_noise[1], + average_noise[2]); + + IWL_DEBUG_CALIB("min_average_noise = %d, antenna %d\n", + min_average_noise, min_average_noise_antenna_i); + + 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); + if (CHAIN_NOISE_MAX_DELTA_GAIN_CODE < + data->delta_gain_code[i]) + data->delta_gain_code[i] = + 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("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_calibration_cmd cmd; + data->radio_write = 1; + + memset(&cmd, 0, sizeof(cmd)); + cmd.opCode = 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]; + rc = iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD, + sizeof(cmd), &cmd); + if (rc) + IWL_DEBUG_CALIB("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; + } + return; +} + +static void iwl4965_sensitivity_calibration(struct iwl_priv *priv, + struct iwl_notif_statistics *resp) +{ + int rc = 0; + u32 rx_enable_time; + u32 fa_cck; + u32 fa_ofdm; + u32 bad_plcp_cck; + u32 bad_plcp_ofdm; + u32 norm_fa_ofdm; + u32 norm_fa_cck; + struct iwl_sensitivity_data *data = NULL; + struct statistics_rx_non_phy *rx_info = &(resp->rx.general); + struct statistics_rx *statistics = &(resp->rx); + unsigned long flags; + struct statistics_general_data statis; + + data = &(priv->sensitivity_data); + + if (!iwl_is_associated(priv)) { + IWL_DEBUG_CALIB("<< - not associated\n"); + return; + } + + spin_lock_irqsave(&priv->lock, flags); + if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) { + IWL_DEBUG_CALIB("<< invalid data.\n"); + spin_unlock_irqrestore(&priv->lock, flags); + return; + } + + /* Extract Statistics: */ + rx_enable_time = le32_to_cpu(rx_info->channel_load); + fa_cck = le32_to_cpu(statistics->cck.false_alarm_cnt); + fa_ofdm = le32_to_cpu(statistics->ofdm.false_alarm_cnt); + bad_plcp_cck = le32_to_cpu(statistics->cck.plcp_err); + bad_plcp_ofdm = le32_to_cpu(statistics->ofdm.plcp_err); + + statis.beacon_silence_rssi_a = + le32_to_cpu(statistics->general.beacon_silence_rssi_a); + statis.beacon_silence_rssi_b = + le32_to_cpu(statistics->general.beacon_silence_rssi_b); + statis.beacon_silence_rssi_c = + le32_to_cpu(statistics->general.beacon_silence_rssi_c); + statis.beacon_energy_a = + le32_to_cpu(statistics->general.beacon_energy_a); + statis.beacon_energy_b = + le32_to_cpu(statistics->general.beacon_energy_b); + statis.beacon_energy_c = + le32_to_cpu(statistics->general.beacon_energy_c); + + spin_unlock_irqrestore(&priv->lock, flags); + + IWL_DEBUG_CALIB("rx_enable_time = %u usecs\n", rx_enable_time); + + if (!rx_enable_time) { + IWL_DEBUG_CALIB("<< RX Enable Time == 0! \n"); + return; + } + + /* These statistics increase monotonically, and do not reset + * at each beacon. Calculate difference from last value, or just + * use the new statistics value if it has reset or wrapped around. */ + if (data->last_bad_plcp_cnt_cck > bad_plcp_cck) + data->last_bad_plcp_cnt_cck = bad_plcp_cck; + else { + bad_plcp_cck -= data->last_bad_plcp_cnt_cck; + data->last_bad_plcp_cnt_cck += bad_plcp_cck; + } + + if (data->last_bad_plcp_cnt_ofdm > bad_plcp_ofdm) + data->last_bad_plcp_cnt_ofdm = bad_plcp_ofdm; + else { + bad_plcp_ofdm -= data->last_bad_plcp_cnt_ofdm; + data->last_bad_plcp_cnt_ofdm += bad_plcp_ofdm; + } + + if (data->last_fa_cnt_ofdm > fa_ofdm) + data->last_fa_cnt_ofdm = fa_ofdm; + else { + fa_ofdm -= data->last_fa_cnt_ofdm; + data->last_fa_cnt_ofdm += fa_ofdm; + } + + if (data->last_fa_cnt_cck > fa_cck) + data->last_fa_cnt_cck = fa_cck; + else { + fa_cck -= data->last_fa_cnt_cck; + data->last_fa_cnt_cck += fa_cck; + } + + /* Total aborted signal locks */ + norm_fa_ofdm = fa_ofdm + bad_plcp_ofdm; + norm_fa_cck = fa_cck + bad_plcp_cck; + + IWL_DEBUG_CALIB("cck: fa %u badp %u ofdm: fa %u badp %u\n", fa_cck, + bad_plcp_cck, fa_ofdm, bad_plcp_ofdm); + + iwl4965_sens_auto_corr_ofdm(priv, norm_fa_ofdm, rx_enable_time); + iwl4965_sens_energy_cck(priv, norm_fa_cck, rx_enable_time, &statis); + rc |= iwl4965_sensitivity_write(priv, CMD_ASYNC); + + return; +} + +static void iwl4965_bg_sensitivity_work(struct work_struct *work) +{ + struct iwl_priv *priv = container_of(work, struct iwl_priv, + sensitivity_work); + + mutex_lock(&priv->mutex); + + if (test_bit(STATUS_EXIT_PENDING, &priv->status) || + test_bit(STATUS_SCANNING, &priv->status)) { + mutex_unlock(&priv->mutex); + return; + } + + if (priv->start_calib) { + iwl4965_noise_calibration(priv, &priv->statistics); + + if (priv->sensitivity_data.state == + IWL_SENS_CALIB_NEED_REINIT) { + iwl4965_init_sensitivity(priv, CMD_ASYNC, 0); + priv->sensitivity_data.state = IWL_SENS_CALIB_ALLOWED; + } else + iwl4965_sensitivity_calibration(priv, + &priv->statistics); + } + + mutex_unlock(&priv->mutex); + return; +} +#endif /*CONFIG_IWLWIFI_SENSITIVITY*/ + +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 assocaited, we must reconfigure the + * TX power since frames can be sent on non-radar channels while + * not associated */ + iwl_hw_reg_send_txpower(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_restricted(priv, HBUS_TARG_WRPTR, + (index & 0xff) | (txq_id << 8)); + iwl_write_restricted_reg(priv, SCD_QUEUE_RDPTR(txq_id), index); +} + +/* + * 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; + int active = test_bit(txq_id, &priv->txq_ctx_active_msk)?1:0; + + iwl_write_restricted_reg(priv, SCD_QUEUE_STATUS_BITS(txq_id), + (active << SCD_QUEUE_STTS_REG_POS_ACTIVE) | + (tx_fifo_id << SCD_QUEUE_STTS_REG_POS_TXF) | + (scd_retry << SCD_QUEUE_STTS_REG_POS_WSL) | + (scd_retry << SCD_QUEUE_STTS_REG_POS_SCD_ACK) | + SCD_QUEUE_STTS_REG_MSK); + + txq->sched_retry = scd_retry; + + IWL_DEBUG_INFO("%s %s Queue %d on AC %d\n", + active ? "Activete" : "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, + IWL_CMD_FIFO_NUM, + IWL_TX_FIFO_HCCA_1, + IWL_TX_FIFO_HCCA_2 +}; + +static inline void iwl4965_txq_ctx_activate(struct iwl_priv *priv, int txq_id) +{ + set_bit(txq_id, &priv->txq_ctx_active_msk); +} + +static inline void iwl4965_txq_ctx_deactivate(struct iwl_priv *priv, int txq_id) +{ + clear_bit(txq_id, &priv->txq_ctx_active_msk); +} + +int iwl4965_alive_notify(struct iwl_priv *priv) +{ + u32 a; + int i = 0; + unsigned long flags; + int rc; + + spin_lock_irqsave(&priv->lock, flags); + +#ifdef CONFIG_IWLWIFI_SENSITIVITY + memset(&(priv->sensitivity_data), 0, + sizeof(struct iwl_sensitivity_data)); + memset(&(priv->chain_noise_data), 0, + sizeof(struct iwl_chain_noise_data)); + for (i = 0; i < NUM_RX_CHAINS; i++) + priv->chain_noise_data.delta_gain_code[i] = + CHAIN_NOISE_DELTA_GAIN_INIT_VAL; +#endif /* CONFIG_IWLWIFI_SENSITIVITY*/ + rc = iwl_grab_restricted_access(priv); + if (rc) { + spin_unlock_irqrestore(&priv->lock, flags); + return rc; + } + + priv->scd_base_addr = iwl_read_restricted_reg(priv, SCD_SRAM_BASE_ADDR); + a = priv->scd_base_addr + SCD_CONTEXT_DATA_OFFSET; + for (; a < priv->scd_base_addr + SCD_TX_STTS_BITMAP_OFFSET; a += 4) + iwl_write_restricted_mem(priv, a, 0); + for (; a < priv->scd_base_addr + SCD_TRANSLATE_TBL_OFFSET; a += 4) + iwl_write_restricted_mem(priv, a, 0); + for (; a < sizeof(u16) * priv->hw_setting.max_txq_num; a += 4) + iwl_write_restricted_mem(priv, a, 0); + + iwl_write_restricted_reg(priv, SCD_DRAM_BASE_ADDR, + (priv->hw_setting.shared_phys + + offsetof(struct iwl_shared, queues_byte_cnt_tbls)) >> 10); + iwl_write_restricted_reg(priv, SCD_QUEUECHAIN_SEL, 0); + + /* initiate the queues */ + for (i = 0; i < priv->hw_setting.max_txq_num; i++) { + iwl_write_restricted_reg(priv, SCD_QUEUE_RDPTR(i), 0); + iwl_write_restricted(priv, HBUS_TARG_WRPTR, 0 | (i << 8)); + iwl_write_restricted_mem(priv, priv->scd_base_addr + + SCD_CONTEXT_QUEUE_OFFSET(i), + (SCD_WIN_SIZE << + SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) & + SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK); + iwl_write_restricted_mem(priv, priv->scd_base_addr + + SCD_CONTEXT_QUEUE_OFFSET(i) + + sizeof(u32), + (SCD_FRAME_LIMIT << + SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) & + SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK); + + } + iwl_write_restricted_reg(priv, SCD_INTERRUPT_MASK, + (1 << priv->hw_setting.max_txq_num) - 1); + + iwl_write_restricted_reg(priv, SCD_TXFACT, + SCD_TXFACT_REG_TXFIFO_MASK(0, 7)); + + iwl4965_set_wr_ptrs(priv, IWL_CMD_QUEUE_NUM, 0); + /* map qos queues to fifos one-to-one */ + for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) { + int ac = default_queue_to_tx_fifo[i]; + iwl4965_txq_ctx_activate(priv, i); + iwl4965_tx_queue_set_status(priv, &priv->txq[i], ac, 0); + } + + iwl_release_restricted_access(priv); + spin_unlock_irqrestore(&priv->lock, flags); + + return 0; +} + +int iwl_hw_set_hw_setting(struct iwl_priv *priv) +{ + priv->hw_setting.shared_virt = + pci_alloc_consistent(priv->pci_dev, + sizeof(struct iwl_shared), + &priv->hw_setting.shared_phys); + + if (!priv->hw_setting.shared_virt) + return -1; + + memset(priv->hw_setting.shared_virt, 0, sizeof(struct iwl_shared)); + + priv->hw_setting.max_txq_num = iwl_param_queues_num; + priv->hw_setting.ac_queue_count = AC_NUM; + + priv->hw_setting.cck_flag = RATE_MCS_CCK_MSK; + priv->hw_setting.tx_cmd_len = sizeof(struct iwl_tx_cmd); + priv->hw_setting.max_rxq_size = RX_QUEUE_SIZE; + priv->hw_setting.max_rxq_log = RX_QUEUE_SIZE_LOG; + + priv->hw_setting.max_stations = IWL4965_STATION_COUNT; + priv->hw_setting.bcast_sta_id = IWL4965_BROADCAST_ID; + return 0; +} + +/** + * iwl_hw_txq_ctx_free - Free TXQ Context + * + * Destroy all TX DMA queues and structures + */ +void iwl_hw_txq_ctx_free(struct iwl_priv *priv) +{ + int txq_id; + + /* Tx queues */ + for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++) + iwl_tx_queue_free(priv, &priv->txq[txq_id]); + + iwl4965_kw_free(priv); +} + +/** + * iwl_hw_txq_free_tfd - Free one TFD, those at index [txq->q.last_used] + * + * Does NOT advance any indexes + */ +int iwl_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq) +{ + struct iwl_tfd_frame *bd_tmp = (struct iwl_tfd_frame *)&txq->bd[0]; + struct iwl_tfd_frame *bd = &bd_tmp[txq->q.last_used]; + struct pci_dev *dev = priv->pci_dev; + int i; + int counter = 0; + int index, is_odd; + + /* classify bd */ + if (txq->q.id == IWL_CMD_QUEUE_NUM) + /* nothing to cleanup after for host commands */ + return 0; + + /* sanity check */ + counter = IWL_GET_BITS(*bd, num_tbs); + if (counter > MAX_NUM_OF_TBS) { + IWL_ERROR("Too many chunks: %i\n", counter); + /* @todo issue fatal error, it is quite serious situation */ + return 0; + } + + /* unmap chunks if any */ + + for (i = 0; i < counter; i++) { + index = i / 2; + is_odd = i & 0x1; + + if (is_odd) + pci_unmap_single( + dev, + IWL_GET_BITS(bd->pa[index], tb2_addr_lo16) | + (IWL_GET_BITS(bd->pa[index], + tb2_addr_hi20) << 16), + IWL_GET_BITS(bd->pa[index], tb2_len), + PCI_DMA_TODEVICE); + + else if (i > 0) + pci_unmap_single(dev, + le32_to_cpu(bd->pa[index].tb1_addr), + IWL_GET_BITS(bd->pa[index], tb1_len), + PCI_DMA_TODEVICE); + + if (txq->txb[txq->q.last_used].skb[i]) { + struct sk_buff *skb = txq->txb[txq->q.last_used].skb[i]; + + dev_kfree_skb(skb); + txq->txb[txq->q.last_used].skb[i] = NULL; + } + } + return 0; +} + +int iwl_hw_reg_set_txpower(struct iwl_priv *priv, s8 power) +{ + IWL_ERROR("TODO: Implement iwl_hw_reg_set_txpower!\n"); + return -EINVAL; +} + +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; +} + +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 const struct iwl_channel_info * +iwl4965_get_channel_txpower_info(struct iwl_priv *priv, u8 phymode, u16 channel) +{ + const struct iwl_channel_info *ch_info; + + ch_info = iwl_get_channel_info(priv, phymode, channel); + + if (!is_channel_valid(ch_info)) + return NULL; + + return ch_info; +} + +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; + + IWL_ERROR("Can't find txatten group for channel %d.\n", channel); + 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->eeprom.calib_info.band_info[b].ch_from == 0) + continue; + + if ((channel >= priv->eeprom.calib_info.band_info[b].ch_from) + && (channel <= priv->eeprom.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; + } +} + +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_ERROR("Tx Power can not find channel %d ", channel); + return -1; + } + + ch_i1 = priv->eeprom.calib_info.band_info[s].ch1.ch_num; + ch_i2 = priv->eeprom.calib_info.band_info[s].ch2.ch_num; + chan_info->ch_num = (u8) channel; + + IWL_DEBUG_TXPOWER("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->eeprom.calib_info.band_info[s].ch1. + measurements[c][m]); + m2 = &(priv->eeprom.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 + ("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 + ("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 + ("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 + ("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 iwl_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 iwl_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; + + /* Sanity check requested level (dBm) */ + if (priv->user_txpower_limit < IWL_TX_POWER_TARGET_POWER_MIN) { + IWL_WARNING("Requested user TXPOWER %d below limit.\n", + priv->user_txpower_limit); + return -EINVAL; + } + if (priv->user_txpower_limit > IWL_TX_POWER_TARGET_POWER_MAX) { + IWL_WARNING("Requested user TXPOWER %d above limit.\n", + priv->user_txpower_limit); + return -EINVAL; + } + + /* user_txpower_limit is in dBm, convert to half-dBm (half-dB units + * are used for indexing into txpower table) */ + user_target_power = 2 * priv->user_txpower_limit; + + /* Get current (RXON) channel, band, width */ + ch_info = + iwl4965_get_channel_txpower_info(priv, priv->phymode, channel); + + IWL_DEBUG_TXPOWER("chan %d band %d is_fat %d\n", channel, band, + is_fat); + + if (!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) + return -EINVAL; + + IWL_DEBUG_TXPOWER("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->eeprom.calib_info.saturation_power24; + else + saturation_power = priv->eeprom.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->eeprom.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("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("chain = %d\n", c); + IWL_DEBUG_TXPOWER("fctry tmp %d, " + "curr tmp %d, comp %d steps\n", + factory_temp, current_temp, + temperature_comp[c]); + + IWL_DEBUG_TXPOWER("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 iwl_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("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("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_WARNING("txpower index %d > 107\n", + power_index); + power_index = 107; + } + if (power_index < 0) { + IWL_WARNING("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("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; +} + +/** + * iwl_hw_reg_send_txpower - Configure the TXPOWER level user limit + * + * Uses the active RXON for channel, band, and characteristics (fat, high) + * The power limit is taken from priv->user_txpower_limit. + */ +int iwl_hw_reg_send_txpower(struct iwl_priv *priv) +{ + struct iwl_txpowertable_cmd cmd = { 0 }; + int rc = 0; + 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_WARNING("TX Power requested while scanning!\n"); + return -EAGAIN; + } + + band = ((priv->phymode == MODE_IEEE80211B) || + (priv->phymode == MODE_IEEE80211G)); + + 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; + + rc = iwl4965_fill_txpower_tbl(priv, band, + le16_to_cpu(priv->active_rxon.channel), + is_fat, ctrl_chan_high, &cmd.tx_power); + if (rc) + return rc; + + rc = iwl_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD, sizeof(cmd), &cmd); + return rc; +} + +int iwl_hw_channel_switch(struct iwl_priv *priv, u16 channel) +{ + int rc; + u8 band = 0; + u8 is_fat = 0; + u8 ctrl_chan_high = 0; + struct iwl_channel_switch_cmd cmd = { 0 }; + const struct iwl_channel_info *ch_info; + + band = ((priv->phymode == MODE_IEEE80211B) || + (priv->phymode == MODE_IEEE80211G)); + + ch_info = iwl_get_channel_info(priv, priv->phymode, 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("error:%d fill txpower_tbl\n", rc); + return rc; + } + + rc = iwl_send_cmd_pdu(priv, REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd); + return rc; +} + +#define RTS_HCCA_RETRY_LIMIT 3 +#define RTS_DFAULT_RETRY_LIMIT 60 + +void iwl_hw_build_tx_cmd_rate(struct iwl_priv *priv, + struct iwl_cmd *cmd, + struct ieee80211_tx_control *ctrl, + struct ieee80211_hdr *hdr, int sta_id, + int is_hcca) +{ + u8 rate; + u8 rts_retry_limit = 0; + u8 data_retry_limit = 0; + __le32 tx_flags; + u16 fc = le16_to_cpu(hdr->frame_control); + + tx_flags = cmd->cmd.tx.tx_flags; + + rate = iwl_rates[ctrl->tx_rate].plcp; + + rts_retry_limit = (is_hcca) ? + RTS_HCCA_RETRY_LIMIT : RTS_DFAULT_RETRY_LIMIT; + + if (ieee80211_is_probe_response(fc)) { + data_retry_limit = 3; + if (data_retry_limit < rts_retry_limit) + rts_retry_limit = data_retry_limit; + } else + data_retry_limit = IWL_DEFAULT_TX_RETRY; + + if (priv->data_retry_limit != -1) + data_retry_limit = priv->data_retry_limit; + + if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) { + switch (fc & IEEE80211_FCTL_STYPE) { + case IEEE80211_STYPE_AUTH: + case IEEE80211_STYPE_DEAUTH: + case IEEE80211_STYPE_ASSOC_REQ: + case IEEE80211_STYPE_REASSOC_REQ: + if (tx_flags & TX_CMD_FLG_RTS_MSK) { + tx_flags &= ~TX_CMD_FLG_RTS_MSK; + tx_flags |= TX_CMD_FLG_CTS_MSK; + } + break; + default: + break; + } + } + + cmd->cmd.tx.rts_retry_limit = rts_retry_limit; + cmd->cmd.tx.data_retry_limit = data_retry_limit; + cmd->cmd.tx.rate_n_flags = iwl_hw_set_rate_n_flags(rate, 0); + cmd->cmd.tx.tx_flags = tx_flags; +} + +int iwl_hw_get_rx_read(struct iwl_priv *priv) +{ + struct iwl_shared *shared_data = priv->hw_setting.shared_virt; + + return IWL_GET_BITS(*shared_data, rb_closed_stts_rb_num); +} + +int iwl_hw_get_temperature(struct iwl_priv *priv) +{ + return priv->temperature; +} + +unsigned int iwl_hw_get_beacon_cmd(struct iwl_priv *priv, + struct iwl_frame *frame, u8 rate) +{ + struct iwl_tx_beacon_cmd *tx_beacon_cmd; + unsigned int frame_size; + + tx_beacon_cmd = &frame->u.beacon; + memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd)); + + tx_beacon_cmd->tx.sta_id = IWL4965_BROADCAST_ID; + tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; + + frame_size = iwl_fill_beacon_frame(priv, + tx_beacon_cmd->frame, + BROADCAST_ADDR, + sizeof(frame->u) - sizeof(*tx_beacon_cmd)); + + BUG_ON(frame_size > MAX_MPDU_SIZE); + tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size); + + if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP)) + tx_beacon_cmd->tx.rate_n_flags = + iwl_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK); + else + tx_beacon_cmd->tx.rate_n_flags = + iwl_hw_set_rate_n_flags(rate, 0); + + tx_beacon_cmd->tx.tx_flags = (TX_CMD_FLG_SEQ_CTL_MSK | + TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK); + return (sizeof(*tx_beacon_cmd) + frame_size); +} + +int iwl_hw_tx_queue_init(struct iwl_priv *priv, struct iwl_tx_queue *txq) +{ + int rc; + unsigned long flags; + int txq_id = txq->q.id; + + spin_lock_irqsave(&priv->lock, flags); + rc = iwl_grab_restricted_access(priv); + if (rc) { + spin_unlock_irqrestore(&priv->lock, flags); + return rc; + } + + iwl_write_restricted(priv, FH_MEM_CBBC_QUEUE(txq_id), + txq->q.dma_addr >> 8); + iwl_write_restricted( + priv, IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id), + IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE | + IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL); + iwl_release_restricted_access(priv); + spin_unlock_irqrestore(&priv->lock, flags); + + return 0; +} + +static inline u8 iwl4965_get_dma_hi_address(dma_addr_t addr) +{ + return sizeof(addr) > sizeof(u32) ? (addr >> 16) >> 16 : 0; +} + +int iwl_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv, void *ptr, + dma_addr_t addr, u16 len) +{ + int index, is_odd; + struct iwl_tfd_frame *tfd = ptr; + u32 num_tbs = IWL_GET_BITS(*tfd, num_tbs); + + if ((num_tbs >= MAX_NUM_OF_TBS) || (num_tbs < 0)) { + IWL_ERROR("Error can not send more than %d chunks\n", + MAX_NUM_OF_TBS); + return -EINVAL; + } + + index = num_tbs / 2; + is_odd = num_tbs & 0x1; + + if (!is_odd) { + tfd->pa[index].tb1_addr = cpu_to_le32(addr); + IWL_SET_BITS(tfd->pa[index], tb1_addr_hi, + iwl4965_get_dma_hi_address(addr)); + IWL_SET_BITS(tfd->pa[index], tb1_len, len); + } else { + IWL_SET_BITS(tfd->pa[index], tb2_addr_lo16, + (u32) (addr & 0xffff)); + IWL_SET_BITS(tfd->pa[index], tb2_addr_hi20, addr >> 16); + IWL_SET_BITS(tfd->pa[index], tb2_len, len); + } + + IWL_SET_BITS(*tfd, num_tbs, num_tbs + 1); + + return 0; +} + +void iwl_hw_card_show_info(struct iwl_priv *priv) +{ + u16 hw_version = priv->eeprom.board_revision_4965; + + IWL_DEBUG_INFO("4965ABGN HW Version %u.%u.%u\n", + ((hw_version >> 8) & 0x0F), + ((hw_version >> 8) >> 4), (hw_version & 0x00FF)); + + IWL_DEBUG_INFO("4965ABGN PBA Number %.16s\n", + priv->eeprom.board_pba_number_4965); +} + +#define IWL_TX_CRC_SIZE 4 +#define IWL_TX_DELIMITER_SIZE 4 + +int iwl4965_tx_queue_update_wr_ptr(struct iwl_priv *priv, + struct iwl_tx_queue *txq, u16 byte_cnt) +{ + int len; + int txq_id = txq->q.id; + struct iwl_shared *shared_data = priv->hw_setting.shared_virt; + + if (txq->need_update == 0) + return 0; + + len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE; + + IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id]. + tfd_offset[txq->q.first_empty], byte_cnt, len); + + if (txq->q.first_empty < IWL4965_MAX_WIN_SIZE) + IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id]. + tfd_offset[IWL4965_QUEUE_SIZE + txq->q.first_empty], + byte_cnt, len); + + return 0; +} + +/* Set up Rx receiver/antenna/chain usage in "staging" RXON image. + * This should not be used for scan command ... it puts data in wrong place. */ +void iwl4965_set_rxon_chain(struct iwl_priv *priv) +{ + u8 is_single = is_single_stream(priv); + u8 idle_state, rx_state; + + priv->staging_rxon.rx_chain = 0; + rx_state = idle_state = 3; + + /* Tell uCode which antennas are actually connected. + * Before first association, we assume all antennas are connected. + * Just after first association, iwl4965_noise_calibration() + * checks which antennas actually *are* connected. */ + priv->staging_rxon.rx_chain |= + cpu_to_le16(priv->valid_antenna << RXON_RX_CHAIN_VALID_POS); + + /* How many receivers should we use? */ + iwl4965_get_rx_chain_counter(priv, &idle_state, &rx_state); + priv->staging_rxon.rx_chain |= + cpu_to_le16(rx_state << RXON_RX_CHAIN_MIMO_CNT_POS); + priv->staging_rxon.rx_chain |= + cpu_to_le16(idle_state << RXON_RX_CHAIN_CNT_POS); + + if (!is_single && (rx_state >= 2) && + !test_bit(STATUS_POWER_PMI, &priv->status)) + priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK; + else + priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK; + + IWL_DEBUG_ASSOC("rx chain %X\n", priv->staging_rxon.rx_chain); +} + +#ifdef CONFIG_IWLWIFI_HT +#ifdef CONFIG_IWLWIFI_HT_AGG +/* + get the traffic load value for tid +*/ +static u32 iwl4965_tl_get_load(struct iwl_priv *priv, u8 tid) +{ + u32 load = 0; + u32 current_time = jiffies_to_msecs(jiffies); + u32 time_diff; + s32 index; + unsigned long flags; + struct iwl_traffic_load *tid_ptr = NULL; + + if (tid >= TID_MAX_LOAD_COUNT) + return 0; + + tid_ptr = &(priv->lq_mngr.agg_ctrl.traffic_load[tid]); + + current_time -= current_time % TID_ROUND_VALUE; + + spin_lock_irqsave(&priv->lq_mngr.lock, flags); + if (!(tid_ptr->queue_count)) + goto out; + + time_diff = TIME_WRAP_AROUND(tid_ptr->time_stamp, current_time); + index = time_diff / TID_QUEUE_CELL_SPACING; + + if (index >= TID_QUEUE_MAX_SIZE) { + u32 oldest_time = current_time - TID_MAX_TIME_DIFF; + + while (tid_ptr->queue_count && + (tid_ptr->time_stamp < oldest_time)) { + tid_ptr->total -= tid_ptr->packet_count[tid_ptr->head]; + tid_ptr->packet_count[tid_ptr->head] = 0; + tid_ptr->time_stamp += TID_QUEUE_CELL_SPACING; + tid_ptr->queue_count--; + tid_ptr->head++; + if (tid_ptr->head >= TID_QUEUE_MAX_SIZE) + tid_ptr->head = 0; + } + } + load = tid_ptr->total; + + out: + spin_unlock_irqrestore(&priv->lq_mngr.lock, flags); + return load; +} + +/* + increment traffic load value for tid and also remove + any old values if passed the certian time period +*/ +static void iwl4965_tl_add_packet(struct iwl_priv *priv, u8 tid) +{ + u32 current_time = jiffies_to_msecs(jiffies); + u32 time_diff; + s32 index; + unsigned long flags; + struct iwl_traffic_load *tid_ptr = NULL; + + if (tid >= TID_MAX_LOAD_COUNT) + return; + + tid_ptr = &(priv->lq_mngr.agg_ctrl.traffic_load[tid]); + + current_time -= current_time % TID_ROUND_VALUE; + + spin_lock_irqsave(&priv->lq_mngr.lock, flags); + if (!(tid_ptr->queue_count)) { + tid_ptr->total = 1; + tid_ptr->time_stamp = current_time; + tid_ptr->queue_count = 1; + tid_ptr->head = 0; + tid_ptr->packet_count[0] = 1; + goto out; + } + + time_diff = TIME_WRAP_AROUND(tid_ptr->time_stamp, current_time); + index = time_diff / TID_QUEUE_CELL_SPACING; + + if (index >= TID_QUEUE_MAX_SIZE) { + u32 oldest_time = current_time - TID_MAX_TIME_DIFF; + + while (tid_ptr->queue_count && + (tid_ptr->time_stamp < oldest_time)) { + tid_ptr->total -= tid_ptr->packet_count[tid_ptr->head]; + tid_ptr->packet_count[tid_ptr->head] = 0; + tid_ptr->time_stamp += TID_QUEUE_CELL_SPACING; + tid_ptr->queue_count--; + tid_ptr->head++; + if (tid_ptr->head >= TID_QUEUE_MAX_SIZE) + tid_ptr->head = 0; + } + } + + index = (tid_ptr->head + index) % TID_QUEUE_MAX_SIZE; + tid_ptr->packet_count[index] = tid_ptr->packet_count[index] + 1; + tid_ptr->total = tid_ptr->total + 1; + + if ((index + 1) > tid_ptr->queue_count) + tid_ptr->queue_count = index + 1; + out: + spin_unlock_irqrestore(&priv->lq_mngr.lock, flags); + +} + +#define MMAC_SCHED_MAX_NUMBER_OF_HT_BACK_FLOWS 7 +enum HT_STATUS { + BA_STATUS_FAILURE = 0, + BA_STATUS_INITIATOR_DELBA, + BA_STATUS_RECIPIENT_DELBA, + BA_STATUS_RENEW_ADDBA_REQUEST, + BA_STATUS_ACTIVE, +}; + +static u8 iwl4964_tl_ba_avail(struct iwl_priv *priv) +{ + int i; + struct iwl_lq_mngr *lq; + u8 count = 0; + u16 msk; + + lq = (struct iwl_lq_mngr *)&(priv->lq_mngr); + for (i = 0; i < TID_MAX_LOAD_COUNT ; i++) { + msk = 1 << i; + if ((lq->agg_ctrl.granted_ba & msk) || + (lq->agg_ctrl.wait_for_agg_status & msk)) + count++; + } + + if (count < MMAC_SCHED_MAX_NUMBER_OF_HT_BACK_FLOWS) + return 1; + + return 0; +} + +static void iwl4965_ba_status(struct iwl_priv *priv, + u8 tid, enum HT_STATUS status); + +static int iwl4965_perform_addba(struct iwl_priv *priv, u8 tid, u32 length, + u32 ba_timeout) +{ + int rc; + + rc = ieee80211_start_BA_session(priv->hw, priv->bssid, tid); + if (rc) + iwl4965_ba_status(priv, tid, BA_STATUS_FAILURE); + + return rc; +} + +static int iwl4965_perform_delba(struct iwl_priv *priv, u8 tid) +{ + int rc; + + rc = ieee80211_stop_BA_session(priv->hw, priv->bssid, tid); + if (rc) + iwl4965_ba_status(priv, tid, BA_STATUS_FAILURE); + + return rc; +} + +static void iwl4965_turn_on_agg_for_tid(struct iwl_priv *priv, + struct iwl_lq_mngr *lq, + u8 auto_agg, u8 tid) +{ + u32 tid_msk = (1 << tid); + unsigned long flags; + + spin_lock_irqsave(&priv->lq_mngr.lock, flags); +/* + if ((auto_agg) && (!lq->enable_counter)){ + lq->agg_ctrl.next_retry = 0; + lq->agg_ctrl.tid_retry = 0; + spin_unlock_irqrestore(&priv->lq_mngr.lock, flags); + return; + } +*/ + if (!(lq->agg_ctrl.granted_ba & tid_msk) && + (lq->agg_ctrl.requested_ba & tid_msk)) { + u8 available_queues; + u32 load; + + spin_unlock_irqrestore(&priv->lq_mngr.lock, flags); + available_queues = iwl4964_tl_ba_avail(priv); + load = iwl4965_tl_get_load(priv, tid); + + spin_lock_irqsave(&priv->lq_mngr.lock, flags); + if (!available_queues) { + if (auto_agg) + lq->agg_ctrl.tid_retry |= tid_msk; + else { + lq->agg_ctrl.requested_ba &= ~tid_msk; + lq->agg_ctrl.wait_for_agg_status &= ~tid_msk; + } + } else if ((auto_agg) && + ((load <= lq->agg_ctrl.tid_traffic_load_threshold) || + ((lq->agg_ctrl.wait_for_agg_status & tid_msk)))) + lq->agg_ctrl.tid_retry |= tid_msk; + else { + lq->agg_ctrl.wait_for_agg_status |= tid_msk; + spin_unlock_irqrestore(&priv->lq_mngr.lock, flags); + iwl4965_perform_addba(priv, tid, 0x40, + lq->agg_ctrl.ba_timeout); + spin_lock_irqsave(&priv->lq_mngr.lock, flags); + } + } + spin_unlock_irqrestore(&priv->lq_mngr.lock, flags); +} + +static void iwl4965_turn_on_agg(struct iwl_priv *priv, u8 tid) +{ + struct iwl_lq_mngr *lq; + unsigned long flags; + + lq = (struct iwl_lq_mngr *)&(priv->lq_mngr); + + if ((tid < TID_MAX_LOAD_COUNT)) + iwl4965_turn_on_agg_for_tid(priv, lq, lq->agg_ctrl.auto_agg, + tid); + else if (tid == TID_ALL_SPECIFIED) { + if (lq->agg_ctrl.requested_ba) { + for (tid = 0; tid < TID_MAX_LOAD_COUNT; tid++) + iwl4965_turn_on_agg_for_tid(priv, lq, + lq->agg_ctrl.auto_agg, tid); + } else { + spin_lock_irqsave(&priv->lq_mngr.lock, flags); + lq->agg_ctrl.tid_retry = 0; + lq->agg_ctrl.next_retry = 0; + spin_unlock_irqrestore(&priv->lq_mngr.lock, flags); + } + } + +} + +void iwl4965_turn_off_agg(struct iwl_priv *priv, u8 tid) +{ + u32 tid_msk; + struct iwl_lq_mngr *lq; + unsigned long flags; + + lq = (struct iwl_lq_mngr *)&(priv->lq_mngr); + + if ((tid < TID_MAX_LOAD_COUNT)) { + tid_msk = 1 << tid; + spin_lock_irqsave(&priv->lq_mngr.lock, flags); + lq->agg_ctrl.wait_for_agg_status |= tid_msk; + lq->agg_ctrl.requested_ba &= ~tid_msk; + spin_unlock_irqrestore(&priv->lq_mngr.lock, flags); + iwl4965_perform_delba(priv, tid); + } else if (tid == TID_ALL_SPECIFIED) { + spin_lock_irqsave(&priv->lq_mngr.lock, flags); + for (tid = 0; tid < TID_MAX_LOAD_COUNT; tid++) { + tid_msk = 1 << tid; + lq->agg_ctrl.wait_for_agg_status |= tid_msk; + spin_unlock_irqrestore(&priv->lq_mngr.lock, flags); + iwl4965_perform_delba(priv, tid); + spin_lock_irqsave(&priv->lq_mngr.lock, flags); + } + lq->agg_ctrl.requested_ba = 0; + spin_unlock_irqrestore(&priv->lq_mngr.lock, flags); + } +} + +static void iwl4965_ba_status(struct iwl_priv *priv, + u8 tid, enum HT_STATUS status) +{ + struct iwl_lq_mngr *lq; + u32 tid_msk = (1 << tid); + unsigned long flags; + + lq = (struct iwl_lq_mngr *)&(priv->lq_mngr); + + if ((tid >= TID_MAX_LOAD_COUNT)) + goto out; + + spin_lock_irqsave(&priv->lq_mngr.lock, flags); + switch (status) { + case BA_STATUS_ACTIVE: + if (!(lq->agg_ctrl.granted_ba & tid_msk)) + lq->agg_ctrl.granted_ba |= tid_msk; + break; + default: + if ((lq->agg_ctrl.granted_ba & tid_msk)) + lq->agg_ctrl.granted_ba &= ~tid_msk; + break; + } + + lq->agg_ctrl.wait_for_agg_status &= ~tid_msk; + if (status != BA_STATUS_ACTIVE) { + if (lq->agg_ctrl.auto_agg) { + lq->agg_ctrl.tid_retry |= tid_msk; + lq->agg_ctrl.next_retry = + jiffies + msecs_to_jiffies(500); + } else + lq->agg_ctrl.requested_ba &= ~tid_msk; + } + spin_unlock_irqrestore(&priv->lq_mngr.lock, flags); + out: + return; +} + +static void iwl4965_bg_agg_work(struct work_struct *work) +{ + struct iwl_priv *priv = container_of(work, struct iwl_priv, + agg_work); + + u32 tid; + u32 retry_tid; + u32 tid_msk; + unsigned long flags; + struct iwl_lq_mngr *lq = (struct iwl_lq_mngr *)&(priv->lq_mngr); + + spin_lock_irqsave(&priv->lq_mngr.lock, flags); + retry_tid = lq->agg_ctrl.tid_retry; + lq->agg_ctrl.tid_retry = 0; + spin_unlock_irqrestore(&priv->lq_mngr.lock, flags); + + if (retry_tid == TID_ALL_SPECIFIED) + iwl4965_turn_on_agg(priv, TID_ALL_SPECIFIED); + else { + for (tid = 0; tid < TID_MAX_LOAD_COUNT; tid++) { + tid_msk = (1 << tid); + if (retry_tid & tid_msk) + iwl4965_turn_on_agg(priv, tid); + } + } + + spin_lock_irqsave(&priv->lq_mngr.lock, flags); + if (lq->agg_ctrl.tid_retry) + lq->agg_ctrl.next_retry = jiffies + msecs_to_jiffies(500); + spin_unlock_irqrestore(&priv->lq_mngr.lock, flags); + return; +} +#endif /*CONFIG_IWLWIFI_HT_AGG */ +#endif /* CONFIG_IWLWIFI_HT */ + +int iwl4965_tx_cmd(struct iwl_priv *priv, struct iwl_cmd *out_cmd, + u8 sta_id, dma_addr_t txcmd_phys, + struct ieee80211_hdr *hdr, u8 hdr_len, + struct ieee80211_tx_control *ctrl, void *sta_in) +{ + struct iwl_tx_cmd cmd; + struct iwl_tx_cmd *tx = (struct iwl_tx_cmd *)&out_cmd->cmd.payload[0]; + dma_addr_t scratch_phys; + u8 unicast = 0; + u8 is_data = 1; + u16 fc; + u16 rate_flags; + int rate_index = min(ctrl->tx_rate & 0xffff, IWL_RATE_COUNT - 1); +#ifdef CONFIG_IWLWIFI_HT +#ifdef CONFIG_IWLWIFI_HT_AGG + __le16 *qc; +#endif /*CONFIG_IWLWIFI_HT_AGG */ +#endif /* CONFIG_IWLWIFI_HT */ + + unicast = !is_multicast_ether_addr(hdr->addr1); + + fc = le16_to_cpu(hdr->frame_control); + if ((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) + is_data = 0; + + memcpy(&cmd, &(out_cmd->cmd.tx), sizeof(struct iwl_tx_cmd)); + memset(tx, 0, sizeof(struct iwl_tx_cmd)); + memcpy(tx->hdr, hdr, hdr_len); + + tx->len = cmd.len; + tx->driver_txop = cmd.driver_txop; + tx->stop_time.life_time = cmd.stop_time.life_time; + tx->tx_flags = cmd.tx_flags; + tx->sta_id = cmd.sta_id; + tx->tid_tspec = cmd.tid_tspec; + tx->timeout.pm_frame_timeout = cmd.timeout.pm_frame_timeout; + tx->next_frame_len = cmd.next_frame_len; + + tx->sec_ctl = cmd.sec_ctl; + memcpy(&(tx->key[0]), &(cmd.key[0]), 16); + tx->tx_flags = cmd.tx_flags; + + tx->rts_retry_limit = cmd.rts_retry_limit; + tx->data_retry_limit = cmd.data_retry_limit; + + scratch_phys = txcmd_phys + sizeof(struct iwl_cmd_header) + + offsetof(struct iwl_tx_cmd, scratch); + tx->dram_lsb_ptr = cpu_to_le32(scratch_phys); + tx->dram_msb_ptr = iwl4965_get_dma_hi_address(scratch_phys); + + /* Hard coded to start at the highest retry fallback position + * until the 4965 specific rate control algorithm is tied in */ + tx->initial_rate_index = LINK_QUAL_MAX_RETRY_NUM - 1; + + /* Alternate between antenna A and B for successive frames */ + if (priv->use_ant_b_for_management_frame) { + priv->use_ant_b_for_management_frame = 0; + rate_flags = RATE_MCS_ANT_B_MSK; + } else { + priv->use_ant_b_for_management_frame = 1; + rate_flags = RATE_MCS_ANT_A_MSK; + } + + if (!unicast || !is_data) { + if ((rate_index >= IWL_FIRST_CCK_RATE) && + (rate_index <= IWL_LAST_CCK_RATE)) + rate_flags |= RATE_MCS_CCK_MSK; + } else { + tx->initial_rate_index = 0; + tx->tx_flags |= TX_CMD_FLG_STA_RATE_MSK; + } + + tx->rate_n_flags = iwl_hw_set_rate_n_flags(iwl_rates[rate_index].plcp, + rate_flags); + + if (ieee80211_is_probe_request(fc)) + tx->tx_flags |= TX_CMD_FLG_TSF_MSK; + else if (ieee80211_is_back_request(fc)) + tx->tx_flags |= TX_CMD_FLG_ACK_MSK | + TX_CMD_FLG_IMM_BA_RSP_MASK; +#ifdef CONFIG_IWLWIFI_HT +#ifdef CONFIG_IWLWIFI_HT_AGG + qc = ieee80211_get_qos_ctrl(hdr); + if (qc && + (priv->iw_mode != IEEE80211_IF_TYPE_IBSS)) { + u8 tid = 0; + tid = (u8) (le16_to_cpu(*qc) & 0xF); + if (tid < TID_MAX_LOAD_COUNT) + iwl4965_tl_add_packet(priv, tid); + } + + if (priv->lq_mngr.agg_ctrl.next_retry && + (time_after(priv->lq_mngr.agg_ctrl.next_retry, jiffies))) { + unsigned long flags; + + spin_lock_irqsave(&priv->lq_mngr.lock, flags); + priv->lq_mngr.agg_ctrl.next_retry = 0; + spin_unlock_irqrestore(&priv->lq_mngr.lock, flags); + schedule_work(&priv->agg_work); + } +#endif +#endif + return 0; +} + +/** + * 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_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 + */ +int iwl4965_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("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("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 + * 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("Calib values R[1-3]: %d %d %d R4: %d\n", + R1, R2, R3, vt); + + if (R3 == R1) { + IWL_ERROR("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("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("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("Getting cooler, delta %d, \n", temp_diff); + temp_diff = -temp_diff; + } else if (temp_diff == 0) + IWL_DEBUG_POWER("Same temp, \n"); + else + IWL_DEBUG_POWER("Getting warmer, delta %d, \n", temp_diff); + + if (temp_diff < IWL_TEMPERATURE_THRESHOLD) { + IWL_DEBUG_POWER("Thermal txpower calib not needed\n"); + return 0; + } + + IWL_DEBUG_POWER("Thermal txpower calib needed\n"); + + return 1; +} + +/* Calculate noise level, based on measurements during network silence just + * before arriving beacon. This measurement can be done only if we know + * exactly when to expect beacons, therefore only when we're associated. */ +static void iwl4965_rx_calc_noise(struct iwl_priv *priv) +{ + struct statistics_rx_non_phy *rx_info + = &(priv->statistics.rx.general); + int num_active_rx = 0; + int total_silence = 0; + int bcn_silence_a = + le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER; + int bcn_silence_b = + le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER; + int bcn_silence_c = + le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER; + + if (bcn_silence_a) { + total_silence += bcn_silence_a; + num_active_rx++; + } + if (bcn_silence_b) { + total_silence += bcn_silence_b; + num_active_rx++; + } + if (bcn_silence_c) { + total_silence += bcn_silence_c; + num_active_rx++; + } + + /* Average among active antennas */ + if (num_active_rx) + priv->last_rx_noise = (total_silence / num_active_rx) - 107; + else + priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE; + + IWL_DEBUG_CALIB("inband silence a %u, b %u, c %u, dBm %d\n", + bcn_silence_a, bcn_silence_b, bcn_silence_c, + priv->last_rx_noise); +} + +void iwl_hw_rx_statistics(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) +{ + struct iwl_rx_packet *pkt = (void *)rxb->skb->data; + int change; + s32 temp; + + IWL_DEBUG_RX("Statistics notification received (%d vs %d).\n", + (int)sizeof(priv->statistics), pkt->len); + + change = ((priv->statistics.general.temperature != + pkt->u.stats.general.temperature) || + ((priv->statistics.flag & + STATISTICS_REPLY_FLG_FAT_MODE_MSK) != + (pkt->u.stats.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK))); + + memcpy(&priv->statistics, &pkt->u.stats, sizeof(priv->statistics)); + + set_bit(STATUS_STATISTICS, &priv->status); + + /* Reschedule the statistics timer to occur in + * REG_RECALIB_PERIOD seconds to ensure we get a + * thermal update even if the uCode doesn't give + * us one */ + mod_timer(&priv->statistics_periodic, jiffies + + msecs_to_jiffies(REG_RECALIB_PERIOD * 1000)); + + if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) && + (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) { + iwl4965_rx_calc_noise(priv); +#ifdef CONFIG_IWLWIFI_SENSITIVITY + queue_work(priv->workqueue, &priv->sensitivity_work); +#endif + } + + /* If the hardware hasn't reported a change in + * temperature then don't bother computing a + * calibrated temperature value */ + if (!change) + return; + + temp = iwl4965_get_temperature(priv); + if (temp < 0) + return; + + if (priv->temperature != temp) { + if (priv->temperature) + IWL_DEBUG_TEMP("Temperature changed " + "from %dC to %dC\n", + KELVIN_TO_CELSIUS(priv->temperature), + KELVIN_TO_CELSIUS(temp)); + else + IWL_DEBUG_TEMP("Temperature " + "initialized to %dC\n", + KELVIN_TO_CELSIUS(temp)); + } + + priv->temperature = temp; + set_bit(STATUS_TEMPERATURE, &priv->status); + + if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) && + iwl4965_is_temp_calib_needed(priv)) + queue_work(priv->workqueue, &priv->txpower_work); +} + +static void iwl4965_handle_data_packet(struct iwl_priv *priv, int is_data, + int include_phy, + struct iwl_rx_mem_buffer *rxb, + struct ieee80211_rx_status *stats) +{ + struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data; + struct iwl4965_rx_phy_res *rx_start = (include_phy) ? + (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) : NULL; + struct ieee80211_hdr *hdr; + u16 len; + __le32 *rx_end; + unsigned int skblen; + u32 ampdu_status; + + if (!include_phy && priv->last_phy_res[0]) + rx_start = (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1]; + + if (!rx_start) { + IWL_ERROR("MPDU frame without a PHY data\n"); + return; + } + if (include_phy) { + hdr = (struct ieee80211_hdr *)((u8 *) & rx_start[1] + + rx_start->cfg_phy_cnt); + + len = le16_to_cpu(rx_start->byte_count); + + rx_end = (__le32 *) ((u8 *) & pkt->u.raw[0] + + sizeof(struct iwl4965_rx_phy_res) + + rx_start->cfg_phy_cnt + len); + + } else { + struct iwl4965_rx_mpdu_res_start *amsdu = + (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw; + + hdr = (struct ieee80211_hdr *)(pkt->u.raw + + sizeof(struct iwl4965_rx_mpdu_res_start)); + len = le16_to_cpu(amsdu->byte_count); + rx_start->byte_count = amsdu->byte_count; + rx_end = (__le32 *) (((u8 *) hdr) + len); + } + if (len > 2342 || len < 16) { + IWL_DEBUG_DROP("byte count out of range [16,2342]" + " : %d\n", len); + return; + } + + ampdu_status = le32_to_cpu(*rx_end); + skblen = ((u8 *) rx_end - (u8 *) & pkt->u.raw[0]) + sizeof(u32); + + /* start from MAC */ + skb_reserve(rxb->skb, (void *)hdr - (void *)pkt); + skb_put(rxb->skb, len); /* end where data ends */ + + /* We only process data packets if the interface is open */ + if (unlikely(!priv->is_open)) { + IWL_DEBUG_DROP_LIMIT + ("Dropping packet while interface is not open.\n"); + return; + } + + if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) { + if (iwl_param_hwcrypto) + iwl_set_decrypted_flag(priv, rxb->skb, + ampdu_status, stats); + iwl_handle_data_packet_monitor(priv, rxb, hdr, len, stats, 0); + return; + } + + stats->flag = 0; + hdr = (struct ieee80211_hdr *)rxb->skb->data; + + if (iwl_param_hwcrypto) + iwl_set_decrypted_flag(priv, rxb->skb, ampdu_status, stats); + + ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats); + priv->alloc_rxb_skb--; + rxb->skb = NULL; +#ifdef LED + priv->led_packets += len; + iwl_setup_activity_timer(priv); +#endif +} + +/* Calc max signal level (dBm) among 3 possible receivers */ +static int iwl4965_calc_rssi(struct iwl4965_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; + u32 agc = (le16_to_cpu(ncphy->agc_info) & IWL_AGC_DB_MASK) + >> IWL_AGC_DB_POS; + + u32 valid_antennae = + (le16_to_cpu(rx_resp->phy_flags) & RX_PHY_FLAGS_ANTENNAE_MASK) + >> 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("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 - IWL_RSSI_OFFSET); +} + +#ifdef CONFIG_IWLWIFI_HT + +/* Parsed Information Elements */ +struct ieee802_11_elems { + u8 *ds_params; + u8 ds_params_len; + u8 *tim; + u8 tim_len; + u8 *ibss_params; + u8 ibss_params_len; + u8 *erp_info; + u8 erp_info_len; + u8 *ht_cap_param; + u8 ht_cap_param_len; + u8 *ht_extra_param; + u8 ht_extra_param_len; +}; + +static int parse_elems(u8 *start, size_t len, struct ieee802_11_elems *elems) +{ + size_t left = len; + u8 *pos = start; + int unknown = 0; + + memset(elems, 0, sizeof(*elems)); + + while (left >= 2) { + u8 id, elen; + + id = *pos++; + elen = *pos++; + left -= 2; + + if (elen > left) + return -1; + + switch (id) { + case WLAN_EID_DS_PARAMS: + elems->ds_params = pos; + elems->ds_params_len = elen; + break; + case WLAN_EID_TIM: + elems->tim = pos; + elems->tim_len = elen; + break; + case WLAN_EID_IBSS_PARAMS: + elems->ibss_params = pos; + elems->ibss_params_len = elen; + break; + case WLAN_EID_ERP_INFO: + elems->erp_info = pos; + elems->erp_info_len = elen; + break; + case WLAN_EID_HT_CAPABILITY: + elems->ht_cap_param = pos; + elems->ht_cap_param_len = elen; + break; + case WLAN_EID_HT_EXTRA_INFO: + elems->ht_extra_param = pos; + elems->ht_extra_param_len = elen; + break; + default: + unknown++; + break; + } + + left -= elen; + pos += elen; + } + + return 0; +} +#endif /* CONFIG_IWLWIFI_HT */ + +static void iwl4965_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id) +{ + unsigned long flags; + + spin_lock_irqsave(&priv->sta_lock, flags); + priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK; + priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK; + priv->stations[sta_id].sta.sta.modify_mask = 0; + priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; + spin_unlock_irqrestore(&priv->sta_lock, flags); + + iwl_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC); +} + +static void iwl4965_update_ps_mode(struct iwl_priv *priv, u16 ps_bit, u8 *addr) +{ + /* FIXME: need locking over ps_status ??? */ + u8 sta_id = iwl_hw_find_station(priv, addr); + + if (sta_id != IWL_INVALID_STATION) { + u8 sta_awake = priv->stations[sta_id]. + ps_status == STA_PS_STATUS_WAKE; + + if (sta_awake && ps_bit) + priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP; + else if (!sta_awake && !ps_bit) { + iwl4965_sta_modify_ps_wake(priv, sta_id); + priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE; + } + } +} + +/* Called for REPLY_4965_RX (legacy ABG frames), or + * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */ +static void iwl4965_rx_reply_rx(struct iwl_priv *priv, + struct iwl_rx_mem_buffer *rxb) +{ + struct iwl_rx_packet *pkt = (void *)rxb->skb->data; + /* Use phy data (Rx signal strength, etc.) contained within + * this rx packet for legacy frames, + * or phy data cached from REPLY_RX_PHY_CMD for HT frames. */ + int include_phy = (pkt->hdr.cmd == REPLY_4965_RX); + struct iwl4965_rx_phy_res *rx_start = (include_phy) ? + (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) : + (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1]; + __le32 *rx_end; + unsigned int len = 0; + struct ieee80211_hdr *header; + u16 fc; + struct ieee80211_rx_status stats = { + .mactime = le64_to_cpu(rx_start->timestamp), + .channel = le16_to_cpu(rx_start->channel), + .phymode = + (rx_start->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ? + MODE_IEEE80211G : MODE_IEEE80211A, + .antenna = 0, + .rate = iwl_hw_get_rate(rx_start->rate_n_flags), + .flag = 0, +#ifdef CONFIG_IWLWIFI_HT_AGG + .ordered = 0 +#endif /* CONFIG_IWLWIFI_HT_AGG */ + }; + u8 network_packet; + + if ((unlikely(rx_start->cfg_phy_cnt > 20))) { + IWL_DEBUG_DROP + ("dsp size out of range [0,20]: " + "%d/n", rx_start->cfg_phy_cnt); + return; + } + if (!include_phy) { + if (priv->last_phy_res[0]) + rx_start = (struct iwl4965_rx_phy_res *) + &priv->last_phy_res[1]; + else + rx_start = NULL; + } + + if (!rx_start) { + IWL_ERROR("MPDU frame without a PHY data\n"); + return; + } + + if (include_phy) { + header = (struct ieee80211_hdr *)((u8 *) & rx_start[1] + + rx_start->cfg_phy_cnt); + + len = le16_to_cpu(rx_start->byte_count); + rx_end = (__le32 *) (pkt->u.raw + rx_start->cfg_phy_cnt + + sizeof(struct iwl4965_rx_phy_res) + len); + } else { + struct iwl4965_rx_mpdu_res_start *amsdu = + (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw; + + header = (void *)(pkt->u.raw + + sizeof(struct iwl4965_rx_mpdu_res_start)); + len = le16_to_cpu(amsdu->byte_count); + rx_end = (__le32 *) (pkt->u.raw + + sizeof(struct iwl4965_rx_mpdu_res_start) + len); + } + + if (!(*rx_end & RX_RES_STATUS_NO_CRC32_ERROR) || + !(*rx_end & RX_RES_STATUS_NO_RXE_OVERFLOW)) { + IWL_DEBUG_RX("Bad CRC or FIFO: 0x%08X.\n", + le32_to_cpu(*rx_end)); + return; + } + + priv->ucode_beacon_time = le32_to_cpu(rx_start->beacon_time_stamp); + + stats.freq = ieee80211chan2mhz(stats.channel); + + /* Find max signal strength (dBm) among 3 antenna/receiver chains */ + stats.ssi = iwl4965_calc_rssi(rx_start); + + /* Meaningful noise values are available only from beacon statistics, + * which are gathered only when associated, and indicate noise + * only for the associated network channel ... + * Ignore these noise values while scanning (other channels) */ + if (iwl_is_associated(priv) && + !test_bit(STATUS_SCANNING, &priv->status)) { + stats.noise = priv->last_rx_noise; + stats.signal = iwl_calc_sig_qual(stats.ssi, stats.noise); + } else { + stats.noise = IWL_NOISE_MEAS_NOT_AVAILABLE; + stats.signal = iwl_calc_sig_qual(stats.ssi, 0); + } + + /* Reset beacon noise level if not associated. */ + if (!iwl_is_associated(priv)) + priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE; + +#ifdef CONFIG_IWLWIFI_DEBUG + /* TODO: Parts of iwl_report_frame are broken for 4965 */ + if (iwl_debug_level & (IWL_DL_RX)) + /* Set "1" to report good data frames in groups of 100 */ + iwl_report_frame(priv, pkt, header, 1); + + if (iwl_debug_level & (IWL_DL_RX | IWL_DL_STATS)) + IWL_DEBUG_RX("Rssi %d, noise %d, qual %d, TSF %lu\n", + stats.ssi, stats.noise, stats.signal, + (long unsigned int)le64_to_cpu(rx_start->timestamp)); +#endif + + network_packet = iwl_is_network_packet(priv, header); + if (network_packet) { + priv->last_rx_rssi = stats.ssi; + priv->last_beacon_time = priv->ucode_beacon_time; + priv->last_tsf = le64_to_cpu(rx_start->timestamp); + } + + fc = le16_to_cpu(header->frame_control); + switch (fc & IEEE80211_FCTL_FTYPE) { + case IEEE80211_FTYPE_MGMT: + + if (priv->iw_mode == IEEE80211_IF_TYPE_AP) + iwl4965_update_ps_mode(priv, fc & IEEE80211_FCTL_PM, + header->addr2); + switch (fc & IEEE80211_FCTL_STYPE) { + case IEEE80211_STYPE_PROBE_RESP: + case IEEE80211_STYPE_BEACON: + if ((priv->iw_mode == IEEE80211_IF_TYPE_STA && + !compare_ether_addr(header->addr2, priv->bssid)) || + (priv->iw_mode == IEEE80211_IF_TYPE_IBSS && + !compare_ether_addr(header->addr3, priv->bssid))) { + struct ieee80211_mgmt *mgmt = + (struct ieee80211_mgmt *)header; + u64 timestamp = + le64_to_cpu(mgmt->u.beacon.timestamp); + + priv->timestamp0 = timestamp & 0xFFFFFFFF; + priv->timestamp1 = + (timestamp >> 32) & 0xFFFFFFFF; + priv->beacon_int = le16_to_cpu( + mgmt->u.beacon.beacon_int); + if (priv->call_post_assoc_from_beacon && + (priv->iw_mode == IEEE80211_IF_TYPE_STA)) { + priv->call_post_assoc_from_beacon = 0; + queue_work(priv->workqueue, + &priv->post_associate.work); + } + } + break; + + case IEEE80211_STYPE_ACTION: + break; + + /* + * TODO: There is no callback function from upper + * stack to inform us when associated status. this + * work around to sniff assoc_resp management frame + * and finish the association process. + */ + case IEEE80211_STYPE_ASSOC_RESP: + case IEEE80211_STYPE_REASSOC_RESP: + if (network_packet && iwl_is_associated(priv)) { +#ifdef CONFIG_IWLWIFI_HT + u8 *pos = NULL; + struct ieee802_11_elems elems; +#endif /*CONFIG_IWLWIFI_HT */ + struct ieee80211_mgmt *mgnt = + (struct ieee80211_mgmt *)header; + + priv->assoc_id = (~((1 << 15) | (1 << 14)) + & le16_to_cpu(mgnt->u.assoc_resp.aid)); + priv->assoc_capability = + le16_to_cpu( + mgnt->u.assoc_resp.capab_info); +#ifdef CONFIG_IWLWIFI_HT + pos = mgnt->u.assoc_resp.variable; + if (!parse_elems(pos, + len - (pos - (u8 *) mgnt), + &elems)) { + if (elems.ht_extra_param && + elems.ht_cap_param) + break; + } +#endif /*CONFIG_IWLWIFI_HT */ + /* assoc_id is 0 no association */ + if (!priv->assoc_id) + break; + if (priv->beacon_int) + queue_work(priv->workqueue, + &priv->post_associate.work); + else + priv->call_post_assoc_from_beacon = 1; + } + + break; + + case IEEE80211_STYPE_PROBE_REQ: + if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) && + !iwl_is_associated(priv)) { + IWL_DEBUG_DROP("Dropping (non network): " + MAC_FMT ", " MAC_FMT ", " + MAC_FMT "\n", + MAC_ARG(header->addr1), + MAC_ARG(header->addr2), + MAC_ARG(header->addr3)); + return; + } + } + iwl4965_handle_data_packet(priv, 0, include_phy, rxb, &stats); + break; + + case IEEE80211_FTYPE_CTL: +#ifdef CONFIG_IWLWIFI_HT_AGG + switch (fc & IEEE80211_FCTL_STYPE) { + case IEEE80211_STYPE_BACK_REQ: + IWL_DEBUG_HT("IEEE80211_STYPE_BACK_REQ arrived\n"); + iwl4965_handle_data_packet(priv, 0, include_phy, + rxb, &stats); + break; + default: + break; + } +#endif + + break; + + case IEEE80211_FTYPE_DATA: + if (priv->iw_mode == IEEE80211_IF_TYPE_AP) + iwl4965_update_ps_mode(priv, fc & IEEE80211_FCTL_PM, + header->addr2); + + if (unlikely(!network_packet)) + IWL_DEBUG_DROP("Dropping (non network): " + MAC_FMT ", " MAC_FMT ", " + MAC_FMT "\n", + MAC_ARG(header->addr1), + MAC_ARG(header->addr2), + MAC_ARG(header->addr3)); + else if (unlikely(is_duplicate_packet(priv, header))) + IWL_DEBUG_DROP("Dropping (dup): " MAC_FMT ", " + MAC_FMT ", " MAC_FMT "\n", + MAC_ARG(header->addr1), + MAC_ARG(header->addr2), + MAC_ARG(header->addr3)); + else + iwl4965_handle_data_packet(priv, 1, include_phy, rxb, + &stats); + break; + default: + break; + + } +} + +/* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD). + * This will be used later in iwl4965_rx_reply_rx() for REPLY_RX_MPDU_CMD. */ +static void iwl4965_rx_reply_rx_phy(struct iwl_priv *priv, + struct iwl_rx_mem_buffer *rxb) +{ + struct iwl_rx_packet *pkt = (void *)rxb->skb->data; + priv->last_phy_res[0] = 1; + memcpy(&priv->last_phy_res[1], &(pkt->u.raw[0]), + sizeof(struct iwl4965_rx_phy_res)); +} + +static void iwl4965_rx_missed_beacon_notif(struct iwl_priv *priv, + struct iwl_rx_mem_buffer *rxb) + +{ +#ifdef CONFIG_IWLWIFI_SENSITIVITY + struct iwl_rx_packet *pkt = (void *)rxb->skb->data; + struct iwl_missed_beacon_notif *missed_beacon; + + missed_beacon = &pkt->u.missed_beacon; + if (le32_to_cpu(missed_beacon->consequtive_missed_beacons) > 5) { + IWL_DEBUG_CALIB("missed bcn cnsq %d totl %d rcd %d expctd %d\n", + le32_to_cpu(missed_beacon->consequtive_missed_beacons), + le32_to_cpu(missed_beacon->total_missed_becons), + le32_to_cpu(missed_beacon->num_recvd_beacons), + le32_to_cpu(missed_beacon->num_expected_beacons)); + priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT; + if (unlikely(!test_bit(STATUS_SCANNING, &priv->status))) + queue_work(priv->workqueue, &priv->sensitivity_work); + } +#endif /*CONFIG_IWLWIFI_SENSITIVITY*/ +} + +#ifdef CONFIG_IWLWIFI_HT +#ifdef CONFIG_IWLWIFI_HT_AGG + +static void iwl4965_set_tx_status(struct iwl_priv *priv, int txq_id, int idx, + u32 status, u32 retry_count, u32 rate) +{ + struct ieee80211_tx_status *tx_status = + &(priv->txq[txq_id].txb[idx].status); + + tx_status->flags = status ? IEEE80211_TX_STATUS_ACK : 0; + tx_status->retry_count += retry_count; + tx_status->control.tx_rate = rate; +} + + +static void iwl_sta_modify_enable_tid_tx(struct iwl_priv *priv, + int sta_id, int tid) +{ + unsigned long flags; + + spin_lock_irqsave(&priv->sta_lock, flags); + priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX; + priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid)); + priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; + spin_unlock_irqrestore(&priv->sta_lock, flags); + + iwl_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC); +} + + +static int iwl4965_tx_status_reply_compressed_ba(struct iwl_priv *priv, + struct iwl_ht_agg *agg, + struct iwl_compressed_ba_resp* + ba_resp) + +{ + int i, sh, ack; + u16 ba_seq_ctl = le16_to_cpu(ba_resp->ba_seq_ctl); + u32 bitmap0, bitmap1; + u32 resp_bitmap0 = le32_to_cpu(ba_resp->ba_bitmap0); + u32 resp_bitmap1 = le32_to_cpu(ba_resp->ba_bitmap1); + + if (unlikely(!agg->wait_for_ba)) { + IWL_ERROR("Received BA when not expected\n"); + return -EINVAL; + } + agg->wait_for_ba = 0; + IWL_DEBUG_TX_REPLY("BA %d %d\n", agg->start_idx, ba_resp->ba_seq_ctl); + sh = agg->start_idx - SEQ_TO_INDEX(ba_seq_ctl>>4); + if (sh < 0) /* tbw something is wrong with indeces */ + sh += 0x100; + + /* don't use 64 bits for now */ + bitmap0 = resp_bitmap0 >> sh; + bitmap1 = resp_bitmap1 >> sh; + bitmap0 |= (resp_bitmap1 & ((1<<sh)|((1<<sh)-1))) << (32 - sh); + + if (agg->frame_count > (64 - sh)) { + IWL_DEBUG_TX_REPLY("more frames than bitmap size"); + return -1; + } + + /* check for success or failure according to the + * transmitted bitmap and back bitmap */ + bitmap0 &= agg->bitmap0; + bitmap1 &= agg->bitmap1; + + for (i = 0; i < agg->frame_count ; i++) { + int idx = (agg->start_idx + i) & 0xff; + ack = bitmap0 & (1 << i); + IWL_DEBUG_TX_REPLY("%s ON i=%d idx=%d raw=%d\n", + ack? "ACK":"NACK", i, idx, agg->start_idx + i); + iwl4965_set_tx_status(priv, agg->txq_id, idx, ack, 0, + agg->rate_n_flags); + + } + + IWL_DEBUG_TX_REPLY("Bitmap %x%x\n", bitmap0, bitmap1); + + return 0; +} + +static inline int iwl_queue_dec_wrap(int index, int n_bd) +{ + return (index == 0) ? n_bd - 1 : index - 1; +} + +static void iwl4965_rx_reply_compressed_ba(struct iwl_priv *priv, + struct iwl_rx_mem_buffer *rxb) +{ + struct iwl_rx_packet *pkt = (void *)rxb->skb->data; + struct iwl_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba; + int index; + struct iwl_tx_queue *txq = NULL; + struct iwl_ht_agg *agg; + u16 ba_resp_scd_flow = le16_to_cpu(ba_resp->scd_flow); + u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn); + + if (ba_resp_scd_flow >= ARRAY_SIZE(priv->txq)) { + IWL_ERROR("BUG_ON scd_flow is bigger than number of queues"); + return; + } + + txq = &priv->txq[ba_resp_scd_flow]; + agg = &priv->stations[ba_resp->sta_id].tid[ba_resp->tid].agg; + index = iwl_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd); + + /* TODO: Need to get this copy more sefely - now good for debug */ +/* + IWL_DEBUG_TX_REPLY("REPLY_COMPRESSED_BA [%d]Received from " MAC_FMT ", + sta_id = %d\n", + agg->wait_for_ba, + MAC_ARG((u8*) &ba_resp->sta_addr_lo32), + ba_resp->sta_id); + IWL_DEBUG_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%X%X, scd_flow = " + "%d, scd_ssn = %d\n", + ba_resp->tid, + ba_resp->ba_seq_ctl, + ba_resp->ba_bitmap1, + ba_resp->ba_bitmap0, + ba_resp->scd_flow, + ba_resp->scd_ssn); + IWL_DEBUG_TX_REPLY("DAT start_idx = %d, bitmap = 0x%X%X \n", + agg->start_idx, + agg->bitmap1, + agg->bitmap0); +*/ + iwl4965_tx_status_reply_compressed_ba(priv, agg, ba_resp); + /* releases all the TFDs until the SSN */ + if (txq->q.last_used != (ba_resp_scd_ssn & 0xff)) + iwl_tx_queue_reclaim(priv, ba_resp_scd_flow, index); + +} + + +static void iwl4965_tx_queue_stop_scheduler(struct iwl_priv *priv, u16 txq_id) +{ + iwl_write_restricted_reg(priv, + SCD_QUEUE_STATUS_BITS(txq_id), + (0 << SCD_QUEUE_STTS_REG_POS_ACTIVE)| + (1 << SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN)); +} + +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 & SCD_QUEUE_RA_TID_MAP_RATID_MSK; + + tbl_dw_addr = priv->scd_base_addr + + SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id); + + tbl_dw = iwl_read_restricted_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_restricted_mem(priv, tbl_dw_addr, tbl_dw); + + return 0; +} + +/** + * txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID + */ +static int iwl4965_tx_queue_agg_enable(struct iwl_priv *priv, int txq_id, + int tx_fifo, int sta_id, int tid, + u16 ssn_idx) +{ + unsigned long flags; + int rc; + u16 ra_tid; + + if (IWL_BACK_QUEUE_FIRST_ID > txq_id) + IWL_WARNING("queue number too small: %d, must be > %d\n", + txq_id, IWL_BACK_QUEUE_FIRST_ID); + + ra_tid = BUILD_RAxTID(sta_id, tid); + + iwl_sta_modify_enable_tid_tx(priv, sta_id, tid); + + spin_lock_irqsave(&priv->lock, flags); + rc = iwl_grab_restricted_access(priv); + if (rc) { + spin_unlock_irqrestore(&priv->lock, flags); + return rc; + } + + iwl4965_tx_queue_stop_scheduler(priv, txq_id); + + iwl4965_tx_queue_set_q2ratid(priv, ra_tid, txq_id); + + + iwl_set_bits_restricted_reg(priv, SCD_QUEUECHAIN_SEL, (1<<txq_id)); + + priv->txq[txq_id].q.last_used = (ssn_idx & 0xff); + priv->txq[txq_id].q.first_empty = (ssn_idx & 0xff); + + /* supposes that ssn_idx is valid (!= 0xFFF) */ + iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx); + + iwl_write_restricted_mem(priv, + priv->scd_base_addr + SCD_CONTEXT_QUEUE_OFFSET(txq_id), + (SCD_WIN_SIZE << SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) & + SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK); + + iwl_write_restricted_mem(priv, priv->scd_base_addr + + SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32), + (SCD_FRAME_LIMIT << SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) + & SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK); + + iwl_set_bits_restricted_reg(priv, SCD_INTERRUPT_MASK, (1 << txq_id)); + + iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 1); + + iwl_release_restricted_access(priv); + spin_unlock_irqrestore(&priv->lock, flags); + + return 0; +} + +/** + * txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID + */ +static int iwl4965_tx_queue_agg_disable(struct iwl_priv *priv, u16 txq_id, + u16 ssn_idx, u8 tx_fifo) +{ + unsigned long flags; + int rc; + + if (IWL_BACK_QUEUE_FIRST_ID > txq_id) { + IWL_WARNING("queue number too small: %d, must be > %d\n", + txq_id, IWL_BACK_QUEUE_FIRST_ID); + return -EINVAL; + } + + spin_lock_irqsave(&priv->lock, flags); + rc = iwl_grab_restricted_access(priv); + if (rc) { + spin_unlock_irqrestore(&priv->lock, flags); + return rc; + } + + iwl4965_tx_queue_stop_scheduler(priv, txq_id); + + iwl_clear_bits_restricted_reg(priv, SCD_QUEUECHAIN_SEL, (1 << txq_id)); + + priv->txq[txq_id].q.last_used = (ssn_idx & 0xff); + priv->txq[txq_id].q.first_empty = (ssn_idx & 0xff); + /* supposes that ssn_idx is valid (!= 0xFFF) */ + iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx); + + iwl_clear_bits_restricted_reg(priv, SCD_INTERRUPT_MASK, (1 << txq_id)); + iwl4965_txq_ctx_deactivate(priv, txq_id); + iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 0); + + iwl_release_restricted_access(priv); + spin_unlock_irqrestore(&priv->lock, flags); + + return 0; +} + +#endif/* CONFIG_IWLWIFI_HT_AGG */ +#endif /* CONFIG_IWLWIFI_HT */ +/* + * RATE SCALE CODE + */ +int iwl4965_init_hw_rates(struct iwl_priv *priv, struct ieee80211_rate *rates) +{ + return 0; +} + + +/** + * iwl4965_add_station - Initialize a station's hardware rate table + * + * The uCode contains a table of fallback rates and retries per rate + * for automatic fallback during transmission. + * + * NOTE: This initializes the table for a single retry per data rate + * which is not optimal. Setting up an intelligent retry per rate + * requires feedback from transmission, which isn't exposed through + * rc80211_simple which is what this driver is currently using. + * + */ +void iwl4965_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap) +{ + int i, r; + struct iwl_link_quality_cmd link_cmd = { + .reserved1 = 0, + }; + u16 rate_flags; + + /* Set up the rate scaling to start at 54M and fallback + * all the way to 1M in IEEE order and then spin on IEEE */ + if (is_ap) + r = IWL_RATE_54M_INDEX; + else if (priv->phymode == MODE_IEEE80211A) + r = IWL_RATE_6M_INDEX; + else + r = IWL_RATE_1M_INDEX; + + for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) { + rate_flags = 0; + if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE) + rate_flags |= RATE_MCS_CCK_MSK; + + rate_flags |= RATE_MCS_ANT_B_MSK; + rate_flags &= ~RATE_MCS_ANT_A_MSK; + link_cmd.rs_table[i].rate_n_flags = + iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags); + r = iwl_get_prev_ieee_rate(r); + } + + link_cmd.general_params.single_stream_ant_msk = 2; + link_cmd.general_params.dual_stream_ant_msk = 3; + link_cmd.agg_params.agg_dis_start_th = 3; + link_cmd.agg_params.agg_time_limit = cpu_to_le16(4000); + + /* Update the rate scaling for control frame Tx to AP */ + link_cmd.sta_id = is_ap ? IWL_AP_ID : IWL4965_BROADCAST_ID; + + iwl_send_cmd_pdu(priv, REPLY_TX_LINK_QUALITY_CMD, sizeof(link_cmd), + &link_cmd); +} + +#ifdef CONFIG_IWLWIFI_HT + +static u8 iwl_is_channel_extension(struct iwl_priv *priv, int phymode, + u16 channel, u8 extension_chan_offset) +{ + const struct iwl_channel_info *ch_info; + + ch_info = iwl_get_channel_info(priv, phymode, channel); + if (!is_channel_valid(ch_info)) + return 0; + + if (extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_AUTO) + return 0; + + if ((ch_info->fat_extension_channel == extension_chan_offset) || + (ch_info->fat_extension_channel == HT_IE_EXT_CHANNEL_MAX)) + return 1; + + return 0; +} + +static u8 iwl_is_fat_tx_allowed(struct iwl_priv *priv, + const struct sta_ht_info *ht_info) +{ + + if (priv->channel_width != IWL_CHANNEL_WIDTH_40MHZ) + return 0; + + if (ht_info->supported_chan_width != IWL_CHANNEL_WIDTH_40MHZ) + return 0; + + if (ht_info->extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_AUTO) + return 0; + + /* no fat tx allowed on 2.4GHZ */ + if (priv->phymode != MODE_IEEE80211A) + return 0; + return (iwl_is_channel_extension(priv, priv->phymode, + ht_info->control_channel, + ht_info->extension_chan_offset)); +} + +void iwl4965_set_rxon_ht(struct iwl_priv *priv, struct sta_ht_info *ht_info) +{ + struct iwl_rxon_cmd *rxon = &priv->staging_rxon; + u32 val; + + if (!ht_info->is_ht) + return; + + if (iwl_is_fat_tx_allowed(priv, ht_info)) + rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED_MSK; + else + rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK | + RXON_FLG_CHANNEL_MODE_PURE_40_MSK); + + if (le16_to_cpu(rxon->channel) != ht_info->control_channel) { + IWL_DEBUG_ASSOC("control diff than current %d %d\n", + le16_to_cpu(rxon->channel), + ht_info->control_channel); + rxon->channel = cpu_to_le16(ht_info->control_channel); + return; + } + + /* Note: control channel is oposit to extension channel */ + switch (ht_info->extension_chan_offset) { + case IWL_EXT_CHANNEL_OFFSET_ABOVE: + rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK); + break; + case IWL_EXT_CHANNEL_OFFSET_BELOW: + rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK; + break; + case IWL_EXT_CHANNEL_OFFSET_AUTO: + rxon->flags &= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK; + break; + default: + rxon->flags &= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK; + break; + } + + val = ht_info->operating_mode; + + rxon->flags |= cpu_to_le32(val << RXON_FLG_HT_OPERATING_MODE_POS); + + priv->active_rate_ht[0] = ht_info->supp_rates[0]; + priv->active_rate_ht[1] = ht_info->supp_rates[1]; + iwl4965_set_rxon_chain(priv); + + IWL_DEBUG_ASSOC("supported HT rate 0x%X %X " + "rxon flags 0x%X operation mode :0x%X " + "extension channel offset 0x%x " + "control chan %d\n", + priv->active_rate_ht[0], priv->active_rate_ht[1], + le32_to_cpu(rxon->flags), ht_info->operating_mode, + ht_info->extension_chan_offset, + ht_info->control_channel); + return; +} + +void iwl4965_set_ht_add_station(struct iwl_priv *priv, u8 index) +{ + __le32 sta_flags; + struct sta_ht_info *ht_info = &priv->current_assoc_ht; + + priv->current_channel_width = IWL_CHANNEL_WIDTH_20MHZ; + if (!ht_info->is_ht) + goto done; + + sta_flags = priv->stations[index].sta.station_flags; + + if (ht_info->tx_mimo_ps_mode == IWL_MIMO_PS_DYNAMIC) + sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK; + else + sta_flags &= ~STA_FLG_RTS_MIMO_PROT_MSK; + + sta_flags |= cpu_to_le32( + (u32)ht_info->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS); + + sta_flags |= cpu_to_le32( + (u32)ht_info->mpdu_density << STA_FLG_AGG_MPDU_DENSITY_POS); + + sta_flags &= (~STA_FLG_FAT_EN_MSK); + ht_info->tx_chan_width = IWL_CHANNEL_WIDTH_20MHZ; + ht_info->chan_width_cap = IWL_CHANNEL_WIDTH_20MHZ; + + if (iwl_is_fat_tx_allowed(priv, ht_info)) { + sta_flags |= STA_FLG_FAT_EN_MSK; + ht_info->chan_width_cap = IWL_CHANNEL_WIDTH_40MHZ; + if (ht_info->supported_chan_width == IWL_CHANNEL_WIDTH_40MHZ) + ht_info->tx_chan_width = IWL_CHANNEL_WIDTH_40MHZ; + } + priv->current_channel_width = ht_info->tx_chan_width; + priv->stations[index].sta.station_flags = sta_flags; + done: + return; +} + +#ifdef CONFIG_IWLWIFI_HT_AGG + +static void iwl4965_sta_modify_add_ba_tid(struct iwl_priv *priv, + int sta_id, int tid, u16 ssn) +{ + unsigned long flags; + + spin_lock_irqsave(&priv->sta_lock, flags); + priv->stations[sta_id].sta.station_flags_msk = 0; + priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK; + priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid; + priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn); + priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; + spin_unlock_irqrestore(&priv->sta_lock, flags); + + iwl_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC); +} + +static void iwl4965_sta_modify_del_ba_tid(struct iwl_priv *priv, + int sta_id, int tid) +{ + unsigned long flags; + + spin_lock_irqsave(&priv->sta_lock, flags); + priv->stations[sta_id].sta.station_flags_msk = 0; + priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK; + priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid; + priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; + spin_unlock_irqrestore(&priv->sta_lock, flags); + + iwl_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC); +} + +static const u16 default_tid_to_tx_fifo[] = { + IWL_TX_FIFO_AC1, + IWL_TX_FIFO_AC0, + IWL_TX_FIFO_AC0, + IWL_TX_FIFO_AC1, + IWL_TX_FIFO_AC2, + IWL_TX_FIFO_AC2, + IWL_TX_FIFO_AC3, + IWL_TX_FIFO_AC3, + IWL_TX_FIFO_NONE, + IWL_TX_FIFO_NONE, + IWL_TX_FIFO_NONE, + IWL_TX_FIFO_NONE, + IWL_TX_FIFO_NONE, + IWL_TX_FIFO_NONE, + IWL_TX_FIFO_NONE, + IWL_TX_FIFO_NONE, + IWL_TX_FIFO_AC3 +}; + +static int iwl_txq_ctx_activate_free(struct iwl_priv *priv) +{ + int txq_id; + + for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++) + if (!test_and_set_bit(txq_id, &priv->txq_ctx_active_msk)) + return txq_id; + return -1; +} + +int iwl_mac_ht_tx_agg_start(struct ieee80211_hw *hw, u8 *da, u16 tid, + u16 *start_seq_num) +{ + + struct iwl_priv *priv = hw->priv; + int sta_id; + int tx_fifo; + int txq_id; + int ssn = -1; + unsigned long flags; + struct iwl_tid_data *tid_data; + + if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo))) + tx_fifo = default_tid_to_tx_fifo[tid]; + else + return -EINVAL; + + IWL_WARNING("iwl-AGG iwl_mac_ht_tx_agg_start on da=" MAC_FMT + " tid=%d\n", MAC_ARG(da), tid); + + sta_id = iwl_hw_find_station(priv, da); + if (sta_id == IWL_INVALID_STATION) + return -ENXIO; + + txq_id = iwl_txq_ctx_activate_free(priv); + if (txq_id == -1) + return -ENXIO; + + spin_lock_irqsave(&priv->sta_lock, flags); + tid_data = &priv->stations[sta_id].tid[tid]; + ssn = SEQ_TO_SN(tid_data->seq_number); + tid_data->agg.txq_id = txq_id; + spin_unlock_irqrestore(&priv->sta_lock, flags); + + *start_seq_num = ssn; + iwl4965_ba_status(priv, tid, BA_STATUS_ACTIVE); + return iwl4965_tx_queue_agg_enable(priv, txq_id, tx_fifo, + sta_id, tid, ssn); +} + + +int iwl_mac_ht_tx_agg_stop(struct ieee80211_hw *hw, u8 *da, u16 tid, + int generator) +{ + + struct iwl_priv *priv = hw->priv; + int tx_fifo_id, txq_id, sta_id, ssn = -1; + struct iwl_tid_data *tid_data; + int rc; + if (!da) { + IWL_ERROR("%s: da = NULL\n", __func__); + return -EINVAL; + } + + if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo))) + tx_fifo_id = default_tid_to_tx_fifo[tid]; + else + return -EINVAL; + + sta_id = iwl_hw_find_station(priv, da); + + if (sta_id == IWL_INVALID_STATION) + return -ENXIO; + + tid_data = &priv->stations[sta_id].tid[tid]; + ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4; + txq_id = tid_data->agg.txq_id; + + rc = iwl4965_tx_queue_agg_disable(priv, txq_id, ssn, tx_fifo_id); + /* FIXME: need more safe way to handle error condition */ + if (rc) + return rc; + + iwl4965_ba_status(priv, tid, BA_STATUS_INITIATOR_DELBA); + IWL_DEBUG_INFO("iwl_mac_ht_tx_agg_stop on da=" MAC_FMT " tid=%d\n", + MAC_ARG(da), tid); + + return 0; +} + +int iwl_mac_ht_rx_agg_start(struct ieee80211_hw *hw, u8 *da, + u16 tid, u16 start_seq_num) +{ + struct iwl_priv *priv = hw->priv; + int sta_id; + + IWL_WARNING("iwl-AGG iwl_mac_ht_rx_agg_start on da=" MAC_FMT + " tid=%d\n", MAC_ARG(da), tid); + sta_id = iwl_hw_find_station(priv, da); + iwl4965_sta_modify_add_ba_tid(priv, sta_id, tid, start_seq_num); + return 0; +} + +int iwl_mac_ht_rx_agg_stop(struct ieee80211_hw *hw, u8 *da, + u16 tid, int generator) +{ + struct iwl_priv *priv = hw->priv; + int sta_id; + + IWL_WARNING("iwl-AGG iwl_mac_ht_rx_agg_stop on da=" MAC_FMT " tid=%d\n", + MAC_ARG(da), tid); + sta_id = iwl_hw_find_station(priv, da); + iwl4965_sta_modify_del_ba_tid(priv, sta_id, tid); + return 0; +} + +#endif /* CONFIG_IWLWIFI_HT_AGG */ +#endif /* CONFIG_IWLWIFI_HT */ + +/* Set up 4965-specific Rx frame reply handlers */ +void iwl_hw_rx_handler_setup(struct iwl_priv *priv) +{ + /* Legacy Rx frames */ + priv->rx_handlers[REPLY_4965_RX] = iwl4965_rx_reply_rx; + + /* High-throughput (HT) Rx frames */ + priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl4965_rx_reply_rx_phy; + priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl4965_rx_reply_rx; + + priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] = + iwl4965_rx_missed_beacon_notif; + +#ifdef CONFIG_IWLWIFI_HT +#ifdef CONFIG_IWLWIFI_HT_AGG + priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl4965_rx_reply_compressed_ba; +#endif /* CONFIG_IWLWIFI_AGG */ +#endif /* CONFIG_IWLWIFI */ +} + +void iwl_hw_setup_deferred_work(struct iwl_priv *priv) +{ + INIT_WORK(&priv->txpower_work, iwl4965_bg_txpower_work); + INIT_WORK(&priv->statistics_work, iwl4965_bg_statistics_work); +#ifdef CONFIG_IWLWIFI_SENSITIVITY + INIT_WORK(&priv->sensitivity_work, iwl4965_bg_sensitivity_work); +#endif +#ifdef CONFIG_IWLWIFI_HT +#ifdef CONFIG_IWLWIFI_HT_AGG + INIT_WORK(&priv->agg_work, iwl4965_bg_agg_work); +#endif /* CONFIG_IWLWIFI_AGG */ +#endif /* CONFIG_IWLWIFI_HT */ + init_timer(&priv->statistics_periodic); + priv->statistics_periodic.data = (unsigned long)priv; + priv->statistics_periodic.function = iwl4965_bg_statistics_periodic; +} + +void iwl_hw_cancel_deferred_work(struct iwl_priv *priv) +{ + del_timer_sync(&priv->statistics_periodic); + + cancel_delayed_work(&priv->init_alive_start); +} + +struct pci_device_id iwl_hw_card_ids[] = { + {0x8086, 0x4229, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, + {0x8086, 0x4230, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, + {0} +}; + +int iwl_eeprom_aqcuire_semaphore(struct iwl_priv *priv) +{ + u16 count; + int rc; + + for (count = 0; count < EEPROM_SEM_RETRY_LIMIT; count++) { + iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG, + CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM); + rc = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG, + CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM, + CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM, + EEPROM_SEM_TIMEOUT); + if (rc >= 0) { + IWL_DEBUG_IO("Aqcuired semaphore after %d tries.\n", + count+1); + return rc; + } + } + + return rc; +} + +inline void iwl_eeprom_release_semaphore(struct iwl_priv *priv) +{ + iwl_clear_bit(priv, CSR_HW_IF_CONFIG_REG, + CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM); +} + + +MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids); |