/****************************************************************************** * * Copyright(c) 2003 - 2009 Intel Corporation. All rights reserved. * * Portions of this file are derived from the ipw3945 project, as well * as portions of the ieee80211 subsystem header files. * * This program is free software; you can redistribute it and/or modify it * under the terms of version 2 of the GNU General Public License as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * * You should have received a copy of the GNU General Public License along with * this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA * * The full GNU General Public License is included in this distribution in the * file called LICENSE. * * Contact Information: * Intel Linux Wireless * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 * *****************************************************************************/ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define DRV_NAME "iwl3945" #include "iwl-fh.h" #include "iwl-3945-fh.h" #include "iwl-commands.h" #include "iwl-3945.h" #include "iwl-helpers.h" #include "iwl-core.h" #include "iwl-dev.h" /* * module name, copyright, version, etc. */ #define DRV_DESCRIPTION \ "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux" #ifdef CONFIG_IWL3945_DEBUG #define VD "d" #else #define VD #endif #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT #define VS "s" #else #define VS #endif #define IWL39_VERSION "1.2.26k" VD VS #define DRV_COPYRIGHT "Copyright(c) 2003-2009 Intel Corporation" #define DRV_AUTHOR "" #define DRV_VERSION IWL39_VERSION MODULE_DESCRIPTION(DRV_DESCRIPTION); MODULE_VERSION(DRV_VERSION); MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR); MODULE_LICENSE("GPL"); /* module parameters */ struct iwl_mod_params iwl3945_mod_params = { .num_of_queues = IWL39_MAX_NUM_QUEUES, .sw_crypto = 1, /* the rest are 0 by default */ }; /*************** DMA-QUEUE-GENERAL-FUNCTIONS ***** * DMA services * * Theory of operation * * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer * of buffer descriptors, each of which points to one or more data buffers for * the device to read from or fill. Driver and device exchange status of each * queue via "read" and "write" pointers. Driver keeps minimum of 2 empty * entries in each circular buffer, to protect against confusing empty and full * queue states. * * The device reads or writes the data in the queues via the device's several * DMA/FIFO channels. Each queue is mapped to a single DMA channel. * * For Tx queue, there are low mark and high mark limits. If, after queuing * the packet for Tx, free space become < low mark, Tx queue stopped. When * reclaiming packets (on 'tx done IRQ), if free space become > high mark, * Tx queue resumed. * * The 3945 operates with six queues: One receive queue, one transmit queue * (#4) for sending commands to the device firmware, and four transmit queues * (#0-3) for data tx via EDCA. An additional 2 HCCA queues are unused. ***************************************************/ /** * iwl3945_queue_init - Initialize queue's high/low-water and read/write indexes */ static int iwl3945_queue_init(struct iwl_priv *priv, struct iwl_queue *q, int count, int slots_num, u32 id) { q->n_bd = count; q->n_window = slots_num; q->id = id; /* count must be power-of-two size, otherwise iwl_queue_inc_wrap * and iwl_queue_dec_wrap are broken. */ BUG_ON(!is_power_of_2(count)); /* slots_num must be power-of-two size, otherwise * get_cmd_index is broken. */ BUG_ON(!is_power_of_2(slots_num)); q->low_mark = q->n_window / 4; if (q->low_mark < 4) q->low_mark = 4; q->high_mark = q->n_window / 8; if (q->high_mark < 2) q->high_mark = 2; q->write_ptr = q->read_ptr = 0; return 0; } /** * iwl3945_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue */ static int iwl3945_tx_queue_alloc(struct iwl_priv *priv, struct iwl_tx_queue *txq, u32 id) { struct pci_dev *dev = priv->pci_dev; /* Driver private data, only for Tx (not command) queues, * not shared with device. */ if (id != IWL_CMD_QUEUE_NUM) { txq->txb = kmalloc(sizeof(txq->txb[0]) * TFD_QUEUE_SIZE_MAX, GFP_KERNEL); if (!txq->txb) { IWL_ERR(priv, "kmalloc for auxiliary BD " "structures failed\n"); goto error; } } else txq->txb = NULL; /* Circular buffer of transmit frame descriptors (TFDs), * shared with device */ txq->tfds39 = pci_alloc_consistent(dev, sizeof(txq->tfds39[0]) * TFD_QUEUE_SIZE_MAX, &txq->q.dma_addr); if (!txq->tfds39) { IWL_ERR(priv, "pci_alloc_consistent(%zd) failed\n", sizeof(txq->tfds39[0]) * TFD_QUEUE_SIZE_MAX); goto error; } txq->q.id = id; return 0; error: kfree(txq->txb); txq->txb = NULL; return -ENOMEM; } /** * iwl3945_tx_queue_init - Allocate and initialize one tx/cmd queue */ int iwl3945_tx_queue_init(struct iwl_priv *priv, struct iwl_tx_queue *txq, int slots_num, u32 txq_id) { int len, i; int rc = 0; /* * Alloc buffer array for commands (Tx or other types of commands). * For the command queue (#4), allocate command space + one big * command for scan, since scan command is very huge; the system will * not have two scans at the same time, so only one is needed. * For data Tx queues (all other queues), no super-size command * space is needed. */ len = sizeof(struct iwl_cmd); for (i = 0; i <= slots_num; i++) { if (i == slots_num) { if (txq_id == IWL_CMD_QUEUE_NUM) len += IWL_MAX_SCAN_SIZE; else continue; } txq->cmd[i] = kmalloc(len, GFP_KERNEL); if (!txq->cmd[i]) goto err; } /* Alloc driver data array and TFD circular buffer */ rc = iwl3945_tx_queue_alloc(priv, txq, txq_id); if (rc) goto err; txq->need_update = 0; /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */ BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1)); /* Initialize queue high/low-water, head/tail indexes */ iwl3945_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id); /* Tell device where to find queue, enable DMA channel. */ iwl3945_hw_tx_queue_init(priv, txq); return 0; err: for (i = 0; i < slots_num; i++) { kfree(txq->cmd[i]); txq->cmd[i] = NULL; } if (txq_id == IWL_CMD_QUEUE_NUM) { kfree(txq->cmd[slots_num]); txq->cmd[slots_num] = NULL; } return -ENOMEM; } /** * iwl3945_tx_queue_free - Deallocate DMA queue. * @txq: Transmit queue to deallocate. * * Empty queue by removing and destroying all BD's. * Free all buffers. * 0-fill, but do not free "txq" descriptor structure. */ void iwl3945_tx_queue_free(struct iwl_priv *priv, struct iwl_tx_queue *txq) { struct iwl_queue *q = &txq->q; struct pci_dev *dev = priv->pci_dev; int len, i; if (q->n_bd == 0) return; /* first, empty all BD's */ for (; q->write_ptr != q->read_ptr; q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) priv->cfg->ops->lib->txq_free_tfd(priv, txq); len = sizeof(struct iwl_cmd) * q->n_window; if (q->id == IWL_CMD_QUEUE_NUM) len += IWL_MAX_SCAN_SIZE; /* De-alloc array of command/tx buffers */ for (i = 0; i < TFD_TX_CMD_SLOTS; i++) kfree(txq->cmd[i]); /* De-alloc circular buffer of TFDs */ if (txq->q.n_bd) pci_free_consistent(dev, sizeof(struct iwl3945_tfd) * txq->q.n_bd, txq->tfds39, txq->q.dma_addr); /* De-alloc array of per-TFD driver data */ kfree(txq->txb); txq->txb = NULL; /* 0-fill queue descriptor structure */ memset(txq, 0, sizeof(*txq)); } /*************** STATION TABLE MANAGEMENT **** * mac80211 should be examined to determine if sta_info is duplicating * the functionality provided here */ /**************************************************************/ #if 0 /* temporary disable till we add real remove station */ /** * iwl3945_remove_station - Remove driver's knowledge of station. * * NOTE: This does not remove station from device's station table. */ static u8 iwl3945_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap) { int index = IWL_INVALID_STATION; int i; unsigned long flags; spin_lock_irqsave(&priv->sta_lock, flags); if (is_ap) index = IWL_AP_ID; else if (is_broadcast_ether_addr(addr)) index = priv->hw_params.bcast_sta_id; else for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) if (priv->stations_39[i].used && !compare_ether_addr(priv->stations_39[i].sta.sta.addr, addr)) { index = i; break; } if (unlikely(index == IWL_INVALID_STATION)) goto out; if (priv->stations_39[index].used) { priv->stations_39[index].used = 0; priv->num_stations--; } BUG_ON(priv->num_stations < 0); out: spin_unlock_irqrestore(&priv->sta_lock, flags); return 0; } #endif /** * iwl3945_clear_stations_table - Clear the driver's station table * * NOTE: This does not clear or otherwise alter the device's station table. */ static void iwl3945_clear_stations_table(struct iwl_priv *priv) { unsigned long flags; spin_lock_irqsave(&priv->sta_lock, flags); priv->num_stations = 0; memset(priv->stations_39, 0, sizeof(priv->stations_39)); spin_unlock_irqrestore(&priv->sta_lock, flags); } /** * iwl3945_add_station - Add station to station tables in driver and device */ u8 iwl3945_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap, u8 flags) { int i; int index = IWL_INVALID_STATION; struct iwl3945_station_entry *station; unsigned long flags_spin; u8 rate; spin_lock_irqsave(&priv->sta_lock, flags_spin); if (is_ap) index = IWL_AP_ID; else if (is_broadcast_ether_addr(addr)) index = priv->hw_params.bcast_sta_id; else for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) { if (!compare_ether_addr(priv->stations_39[i].sta.sta.addr, addr)) { index = i; break; } if (!priv->stations_39[i].used && index == IWL_INVALID_STATION) index = i; } /* These two conditions has the same outcome but keep them separate since they have different meaning */ if (unlikely(index == IWL_INVALID_STATION)) { spin_unlock_irqrestore(&priv->sta_lock, flags_spin); return index; } if (priv->stations_39[index].used && !compare_ether_addr(priv->stations_39[index].sta.sta.addr, addr)) { spin_unlock_irqrestore(&priv->sta_lock, flags_spin); return index; } IWL_DEBUG_ASSOC("Add STA ID %d: %pM\n", index, addr); station = &priv->stations_39[index]; station->used = 1; priv->num_stations++; /* Set up the REPLY_ADD_STA command to send to device */ memset(&station->sta, 0, sizeof(struct iwl3945_addsta_cmd)); memcpy(station->sta.sta.addr, addr, ETH_ALEN); station->sta.mode = 0; station->sta.sta.sta_id = index; station->sta.station_flags = 0; if (priv->band == IEEE80211_BAND_5GHZ) rate = IWL_RATE_6M_PLCP; else rate = IWL_RATE_1M_PLCP; /* Turn on both antennas for the station... */ station->sta.rate_n_flags = iwl3945_hw_set_rate_n_flags(rate, RATE_MCS_ANT_AB_MSK); spin_unlock_irqrestore(&priv->sta_lock, flags_spin); /* Add station to device's station table */ iwl3945_send_add_station(priv, &station->sta, flags); return index; } int iwl3945_send_statistics_request(struct iwl_priv *priv) { u32 val = 0; struct iwl_host_cmd cmd = { .id = REPLY_STATISTICS_CMD, .len = sizeof(val), .data = &val, }; return iwl_send_cmd_sync(priv, &cmd); } /** * iwl3945_set_rxon_channel - Set the phymode and channel values in staging RXON * @band: 2.4 or 5 GHz band * @channel: Any channel valid for the requested band * In addition to setting the staging RXON, priv->band is also set. * * NOTE: Does not commit to the hardware; it sets appropriate bit fields * in the staging RXON flag structure based on the band */ static int iwl3945_set_rxon_channel(struct iwl_priv *priv, enum ieee80211_band band, u16 channel) { if (!iwl3945_get_channel_info(priv, band, channel)) { IWL_DEBUG_INFO("Could not set channel to %d [%d]\n", channel, band); return -EINVAL; } if ((le16_to_cpu(priv->staging39_rxon.channel) == channel) && (priv->band == band)) return 0; priv->staging39_rxon.channel = cpu_to_le16(channel); if (band == IEEE80211_BAND_5GHZ) priv->staging39_rxon.flags &= ~RXON_FLG_BAND_24G_MSK; else priv->staging39_rxon.flags |= RXON_FLG_BAND_24G_MSK; priv->band = band; IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, band); return 0; } /** * iwl3945_check_rxon_cmd - validate RXON structure is valid * * NOTE: This is really only useful during development and can eventually * be #ifdef'd out once the driver is stable and folks aren't actively * making changes */ static int iwl3945_check_rxon_cmd(struct iwl_priv *priv) { int error = 0; int counter = 1; struct iwl3945_rxon_cmd *rxon = &priv->staging39_rxon; if (rxon->flags & RXON_FLG_BAND_24G_MSK) { error |= le32_to_cpu(rxon->flags & (RXON_FLG_TGJ_NARROW_BAND_MSK | RXON_FLG_RADAR_DETECT_MSK)); if (error) IWL_WARN(priv, "check 24G fields %d | %d\n", counter++, error); } else { error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ? 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK); if (error) IWL_WARN(priv, "check 52 fields %d | %d\n", counter++, error); error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK); if (error) IWL_WARN(priv, "check 52 CCK %d | %d\n", counter++, error); } error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1; if (error) IWL_WARN(priv, "check mac addr %d | %d\n", counter++, error); /* make sure basic rates 6Mbps and 1Mbps are supported */ error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) && ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0)); if (error) IWL_WARN(priv, "check basic rate %d | %d\n", counter++, error); error |= (le16_to_cpu(rxon->assoc_id) > 2007); if (error) IWL_WARN(priv, "check assoc id %d | %d\n", counter++, error); error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)); if (error) IWL_WARN(priv, "check CCK and short slot %d | %d\n", counter++, error); error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)); if (error) IWL_WARN(priv, "check CCK & auto detect %d | %d\n", counter++, error); error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK); if (error) IWL_WARN(priv, "check TGG and auto detect %d | %d\n", counter++, error); if ((rxon->flags & RXON_FLG_DIS_DIV_MSK)) error |= ((rxon->flags & (RXON_FLG_ANT_B_MSK | RXON_FLG_ANT_A_MSK)) == 0); if (error) IWL_WARN(priv, "check antenna %d %d\n", counter++, error); if (error) IWL_WARN(priv, "Tuning to channel %d\n", le16_to_cpu(rxon->channel)); if (error) { IWL_ERR(priv, "Not a valid rxon_assoc_cmd field values\n"); return -1; } return 0; } /** * iwl3945_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed * @priv: staging_rxon is compared to active_rxon * * If the RXON structure is changing enough to require a new tune, * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required. */ static int iwl3945_full_rxon_required(struct iwl_priv *priv) { /* These items are only settable from the full RXON command */ if (!(iwl3945_is_associated(priv)) || compare_ether_addr(priv->staging39_rxon.bssid_addr, priv->active39_rxon.bssid_addr) || compare_ether_addr(priv->staging39_rxon.node_addr, priv->active39_rxon.node_addr) || compare_ether_addr(priv->staging39_rxon.wlap_bssid_addr, priv->active39_rxon.wlap_bssid_addr) || (priv->staging39_rxon.dev_type != priv->active39_rxon.dev_type) || (priv->staging39_rxon.channel != priv->active39_rxon.channel) || (priv->staging39_rxon.air_propagation != priv->active39_rxon.air_propagation) || (priv->staging39_rxon.assoc_id != priv->active39_rxon.assoc_id)) return 1; /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can * be updated with the RXON_ASSOC command -- however only some * flag transitions are allowed using RXON_ASSOC */ /* Check if we are not switching bands */ if ((priv->staging39_rxon.flags & RXON_FLG_BAND_24G_MSK) != (priv->active39_rxon.flags & RXON_FLG_BAND_24G_MSK)) return 1; /* Check if we are switching association toggle */ if ((priv->staging39_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) != (priv->active39_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) return 1; return 0; } static int iwl3945_send_rxon_assoc(struct iwl_priv *priv) { int rc = 0; struct iwl_rx_packet *res = NULL; struct iwl3945_rxon_assoc_cmd rxon_assoc; struct iwl_host_cmd cmd = { .id = REPLY_RXON_ASSOC, .len = sizeof(rxon_assoc), .meta.flags = CMD_WANT_SKB, .data = &rxon_assoc, }; const struct iwl3945_rxon_cmd *rxon1 = &priv->staging39_rxon; const struct iwl3945_rxon_cmd *rxon2 = &priv->active39_rxon; if ((rxon1->flags == rxon2->flags) && (rxon1->filter_flags == rxon2->filter_flags) && (rxon1->cck_basic_rates == rxon2->cck_basic_rates) && (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) { IWL_DEBUG_INFO("Using current RXON_ASSOC. Not resending.\n"); return 0; } rxon_assoc.flags = priv->staging39_rxon.flags; rxon_assoc.filter_flags = priv->staging39_rxon.filter_flags; rxon_assoc.ofdm_basic_rates = priv->staging39_rxon.ofdm_basic_rates; rxon_assoc.cck_basic_rates = priv->staging39_rxon.cck_basic_rates; rxon_assoc.reserved = 0; rc = iwl_send_cmd_sync(priv, &cmd); if (rc) return rc; res = (struct iwl_rx_packet *)cmd.meta.u.skb->data; if (res->hdr.flags & IWL_CMD_FAILED_MSK) { IWL_ERR(priv, "Bad return from REPLY_RXON_ASSOC command\n"); rc = -EIO; } priv->alloc_rxb_skb--; dev_kfree_skb_any(cmd.meta.u.skb); return rc; } /** * iwl3945_commit_rxon - commit staging_rxon to hardware * * The RXON command in staging_rxon is committed to the hardware and * the active_rxon structure is updated with the new data. This * function correctly transitions out of the RXON_ASSOC_MSK state if * a HW tune is required based on the RXON structure changes. */ static int iwl3945_commit_rxon(struct iwl_priv *priv) { /* cast away the const for active_rxon in this function */ struct iwl3945_rxon_cmd *active_rxon = (void *)&priv->active39_rxon; int rc = 0; if (!iwl_is_alive(priv)) return -1; /* always get timestamp with Rx frame */ priv->staging39_rxon.flags |= RXON_FLG_TSF2HOST_MSK; /* select antenna */ priv->staging39_rxon.flags &= ~(RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_SEL_MSK); priv->staging39_rxon.flags |= iwl3945_get_antenna_flags(priv); rc = iwl3945_check_rxon_cmd(priv); if (rc) { IWL_ERR(priv, "Invalid RXON configuration. Not committing.\n"); return -EINVAL; } /* If we don't need to send a full RXON, we can use * iwl3945_rxon_assoc_cmd which is used to reconfigure filter * and other flags for the current radio configuration. */ if (!iwl3945_full_rxon_required(priv)) { rc = iwl3945_send_rxon_assoc(priv); if (rc) { IWL_ERR(priv, "Error setting RXON_ASSOC " "configuration (%d).\n", rc); return rc; } memcpy(active_rxon, &priv->staging39_rxon, sizeof(*active_rxon)); return 0; } /* If we are currently associated and the new config requires * an RXON_ASSOC and the new config wants the associated mask enabled, * we must clear the associated from the active configuration * before we apply the new config */ if (iwl3945_is_associated(priv) && (priv->staging39_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) { IWL_DEBUG_INFO("Toggling associated bit on current RXON\n"); active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK; rc = iwl_send_cmd_pdu(priv, REPLY_RXON, sizeof(struct iwl3945_rxon_cmd), &priv->active39_rxon); /* If the mask clearing failed then we set * active_rxon back to what it was previously */ if (rc) { active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK; IWL_ERR(priv, "Error clearing ASSOC_MSK on current " "configuration (%d).\n", rc); return rc; } } IWL_DEBUG_INFO("Sending RXON\n" "* with%s RXON_FILTER_ASSOC_MSK\n" "* channel = %d\n" "* bssid = %pM\n", ((priv->staging39_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ? "" : "out"), le16_to_cpu(priv->staging39_rxon.channel), priv->staging_rxon.bssid_addr); /* Apply the new configuration */ rc = iwl_send_cmd_pdu(priv, REPLY_RXON, sizeof(struct iwl3945_rxon_cmd), &priv->staging39_rxon); if (rc) { IWL_ERR(priv, "Error setting new configuration (%d).\n", rc); return rc; } memcpy(active_rxon, &priv->staging39_rxon, sizeof(*active_rxon)); iwl3945_clear_stations_table(priv); /* If we issue a new RXON command which required a tune then we must * send a new TXPOWER command or we won't be able to Tx any frames */ rc = iwl3945_hw_reg_send_txpower(priv); if (rc) { IWL_ERR(priv, "Error setting Tx power (%d).\n", rc); return rc; } /* Add the broadcast address so we can send broadcast frames */ if (iwl3945_add_station(priv, iwl_bcast_addr, 0, 0) == IWL_INVALID_STATION) { IWL_ERR(priv, "Error adding BROADCAST address for transmit.\n"); return -EIO; } /* If we have set the ASSOC_MSK and we are in BSS mode then * add the IWL_AP_ID to the station rate table */ if (iwl3945_is_associated(priv) && (priv->iw_mode == NL80211_IFTYPE_STATION)) if (iwl3945_add_station(priv, priv->active39_rxon.bssid_addr, 1, 0) == IWL_INVALID_STATION) { IWL_ERR(priv, "Error adding AP address for transmit\n"); return -EIO; } /* Init the hardware's rate fallback order based on the band */ rc = iwl3945_init_hw_rate_table(priv); if (rc) { IWL_ERR(priv, "Error setting HW rate table: %02X\n", rc); return -EIO; } return 0; } static int iwl3945_send_bt_config(struct iwl_priv *priv) { struct iwl_bt_cmd bt_cmd = { .flags = 3, .lead_time = 0xAA, .max_kill = 1, .kill_ack_mask = 0, .kill_cts_mask = 0, }; return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG, sizeof(bt_cmd), &bt_cmd); } static int iwl3945_send_scan_abort(struct iwl_priv *priv) { int rc = 0; struct iwl_rx_packet *res; struct iwl_host_cmd cmd = { .id = REPLY_SCAN_ABORT_CMD, .meta.flags = CMD_WANT_SKB, }; /* If there isn't a scan actively going on in the hardware * then we are in between scan bands and not actually * actively scanning, so don't send the abort command */ if (!test_bit(STATUS_SCAN_HW, &priv->status)) { clear_bit(STATUS_SCAN_ABORTING, &priv->status); return 0; } rc = iwl_send_cmd_sync(priv, &cmd); if (rc) { clear_bit(STATUS_SCAN_ABORTING, &priv->status); return rc; } res = (struct iwl_rx_packet *)cmd.meta.u.skb->data; if (res->u.status != CAN_ABORT_STATUS) { /* The scan abort will return 1 for success or * 2 for "failure". A failure condition can be * due to simply not being in an active scan which * can occur if we send the scan abort before we * the microcode has notified us that a scan is * completed. */ IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status); clear_bit(STATUS_SCAN_ABORTING, &priv->status); clear_bit(STATUS_SCAN_HW, &priv->status); } dev_kfree_skb_any(cmd.meta.u.skb); return rc; } static int iwl3945_add_sta_sync_callback(struct iwl_priv *priv, struct iwl_cmd *cmd, struct sk_buff *skb) { struct iwl_rx_packet *res = NULL; if (!skb) { IWL_ERR(priv, "Error: Response NULL in REPLY_ADD_STA.\n"); return 1; } res = (struct iwl_rx_packet *)skb->data; if (res->hdr.flags & IWL_CMD_FAILED_MSK) { IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n", res->hdr.flags); return 1; } switch (res->u.add_sta.status) { case ADD_STA_SUCCESS_MSK: break; default: break; } /* We didn't cache the SKB; let the caller free it */ return 1; } int iwl3945_send_add_station(struct iwl_priv *priv, struct iwl3945_addsta_cmd *sta, u8 flags) { struct iwl_rx_packet *res = NULL; int rc = 0; struct iwl_host_cmd cmd = { .id = REPLY_ADD_STA, .len = sizeof(struct iwl3945_addsta_cmd), .meta.flags = flags, .data = sta, }; if (flags & CMD_ASYNC) cmd.meta.u.callback = iwl3945_add_sta_sync_callback; else cmd.meta.flags |= CMD_WANT_SKB; rc = iwl_send_cmd(priv, &cmd); if (rc || (flags & CMD_ASYNC)) return rc; res = (struct iwl_rx_packet *)cmd.meta.u.skb->data; if (res->hdr.flags & IWL_CMD_FAILED_MSK) { IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n", res->hdr.flags); rc = -EIO; } if (rc == 0) { switch (res->u.add_sta.status) { case ADD_STA_SUCCESS_MSK: IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n"); break; default: rc = -EIO; IWL_WARN(priv, "REPLY_ADD_STA failed\n"); break; } } priv->alloc_rxb_skb--; dev_kfree_skb_any(cmd.meta.u.skb); return rc; } static int iwl3945_update_sta_key_info(struct iwl_priv *priv, struct ieee80211_key_conf *keyconf, u8 sta_id) { unsigned long flags; __le16 key_flags = 0; switch (keyconf->alg) { case ALG_CCMP: key_flags |= STA_KEY_FLG_CCMP; key_flags |= cpu_to_le16( keyconf->keyidx << STA_KEY_FLG_KEYID_POS); key_flags &= ~STA_KEY_FLG_INVALID; break; case ALG_TKIP: case ALG_WEP: default: return -EINVAL; } spin_lock_irqsave(&priv->sta_lock, flags); priv->stations_39[sta_id].keyinfo.alg = keyconf->alg; priv->stations_39[sta_id].keyinfo.keylen = keyconf->keylen; memcpy(priv->stations_39[sta_id].keyinfo.key, keyconf->key, keyconf->keylen); memcpy(priv->stations_39[sta_id].sta.key.key, keyconf->key, keyconf->keylen); priv->stations_39[sta_id].sta.key.key_flags = key_flags; priv->stations_39[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK; priv->stations_39[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; spin_unlock_irqrestore(&priv->sta_lock, flags); IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n"); iwl3945_send_add_station(priv, &priv->stations_39[sta_id].sta, 0); return 0; } static int iwl3945_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id) { unsigned long flags; spin_lock_irqsave(&priv->sta_lock, flags); memset(&priv->stations_39[sta_id].keyinfo, 0, sizeof(struct iwl3945_hw_key)); memset(&priv->stations_39[sta_id].sta.key, 0, sizeof(struct iwl4965_keyinfo)); priv->stations_39[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC; priv->stations_39[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK; priv->stations_39[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; spin_unlock_irqrestore(&priv->sta_lock, flags); IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n"); iwl3945_send_add_station(priv, &priv->stations_39[sta_id].sta, 0); return 0; } static void iwl3945_clear_free_frames(struct iwl_priv *priv) { struct list_head *element; IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n", priv->frames_count); while (!list_empty(&priv->free_frames)) { element = priv->free_frames.next; list_del(element); kfree(list_entry(element, struct iwl3945_frame, list)); priv->frames_count--; } if (priv->frames_count) { IWL_WARN(priv, "%d frames still in use. Did we lose one?\n", priv->frames_count); priv->frames_count = 0; } } static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl_priv *priv) { struct iwl3945_frame *frame; struct list_head *element; if (list_empty(&priv->free_frames)) { frame = kzalloc(sizeof(*frame), GFP_KERNEL); if (!frame) { IWL_ERR(priv, "Could not allocate frame!\n"); return NULL; } priv->frames_count++; return frame; } element = priv->free_frames.next; list_del(element); return list_entry(element, struct iwl3945_frame, list); } static void iwl3945_free_frame(struct iwl_priv *priv, struct iwl3945_frame *frame) { memset(frame, 0, sizeof(*frame)); list_add(&frame->list, &priv->free_frames); } unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv, struct ieee80211_hdr *hdr, int left) { if (!iwl3945_is_associated(priv) || !priv->ibss_beacon || ((priv->iw_mode != NL80211_IFTYPE_ADHOC) && (priv->iw_mode != NL80211_IFTYPE_AP))) return 0; if (priv->ibss_beacon->len > left) return 0; memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len); return priv->ibss_beacon->len; } static u8 iwl3945_rate_get_lowest_plcp(struct iwl_priv *priv) { u8 i; int rate_mask; /* Set rate mask*/ if (priv->staging39_rxon.flags & RXON_FLG_BAND_24G_MSK) rate_mask = priv->active_rate_basic & IWL_CCK_RATES_MASK; else rate_mask = priv->active_rate_basic & IWL_OFDM_RATES_MASK; for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID; i = iwl3945_rates[i].next_ieee) { if (rate_mask & (1 << i)) return iwl3945_rates[i].plcp; } /* No valid rate was found. Assign the lowest one */ if (priv->staging39_rxon.flags & RXON_FLG_BAND_24G_MSK) return IWL_RATE_1M_PLCP; else return IWL_RATE_6M_PLCP; } static int iwl3945_send_beacon_cmd(struct iwl_priv *priv) { struct iwl3945_frame *frame; unsigned int frame_size; int rc; u8 rate; frame = iwl3945_get_free_frame(priv); if (!frame) { IWL_ERR(priv, "Could not obtain free frame buffer for beacon " "command.\n"); return -ENOMEM; } rate = iwl3945_rate_get_lowest_plcp(priv); frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate); rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size, &frame->u.cmd[0]); iwl3945_free_frame(priv, frame); return rc; } /****************************************************************************** * * EEPROM related functions * ******************************************************************************/ static void get_eeprom_mac(struct iwl_priv *priv, u8 *mac) { memcpy(mac, priv->eeprom39.mac_address, 6); } /* * Clear the OWNER_MSK, to establish driver (instead of uCode running on * embedded controller) as EEPROM reader; each read is a series of pulses * to/from the EEPROM chip, not a single event, so even reads could conflict * if they weren't arbitrated by some ownership mechanism. Here, the driver * simply claims ownership, which should be safe when this function is called * (i.e. before loading uCode!). */ static inline int iwl3945_eeprom_acquire_semaphore(struct iwl_priv *priv) { _iwl_clear_bit(priv, CSR_EEPROM_GP, CSR_EEPROM_GP_IF_OWNER_MSK); return 0; } /** * iwl3945_eeprom_init - read EEPROM contents * * Load the EEPROM contents from adapter into priv->eeprom39 * * NOTE: This routine uses the non-debug IO access functions. */ int iwl3945_eeprom_init(struct iwl_priv *priv) { u16 *e = (u16 *)&priv->eeprom39; u32 gp = iwl_read32(priv, CSR_EEPROM_GP); int sz = sizeof(priv->eeprom39); int ret; u16 addr; /* The EEPROM structure has several padding buffers within it * and when adding new EEPROM maps is subject to programmer errors * which may be very difficult to identify without explicitly * checking the resulting size of the eeprom map. */ BUILD_BUG_ON(sizeof(priv->eeprom39) != IWL_EEPROM_IMAGE_SIZE); if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) { IWL_ERR(priv, "EEPROM not found, EEPROM_GP=0x%08x\n", gp); return -ENOENT; } /* Make sure driver (instead of uCode) is allowed to read EEPROM */ ret = iwl3945_eeprom_acquire_semaphore(priv); if (ret < 0) { IWL_ERR(priv, "Failed to acquire EEPROM semaphore.\n"); return -ENOENT; } /* eeprom is an array of 16bit values */ for (addr = 0; addr < sz; addr += sizeof(u16)) { u32 r; _iwl_write32(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_MSK_ADDR & (addr << 1)); _iwl_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD); ret = iwl_poll_direct_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_READ_VALID_MSK, IWL_EEPROM_ACCESS_TIMEOUT); if (ret < 0) { IWL_ERR(priv, "Time out reading EEPROM[%d]\n", addr); return ret; } r = _iwl_read_direct32(priv, CSR_EEPROM_REG); e[addr / 2] = le16_to_cpu((__force __le16)(r >> 16)); } return 0; } static void iwl3945_unset_hw_params(struct iwl_priv *priv) { if (priv->shared_virt) pci_free_consistent(priv->pci_dev, sizeof(struct iwl3945_shared), priv->shared_virt, priv->shared_phys); } /** * iwl3945_supported_rate_to_ie - fill in the supported rate in IE field * * return : set the bit for each supported rate insert in ie */ static u16 iwl3945_supported_rate_to_ie(u8 *ie, u16 supported_rate, u16 basic_rate, int *left) { u16 ret_rates = 0, bit; int i; u8 *cnt = ie; u8 *rates = ie + 1; for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) { if (bit & supported_rate) { ret_rates |= bit; rates[*cnt] = iwl3945_rates[i].ieee | ((bit & basic_rate) ? 0x80 : 0x00); (*cnt)++; (*left)--; if ((*left <= 0) || (*cnt >= IWL_SUPPORTED_RATES_IE_LEN)) break; } } return ret_rates; } /** * iwl3945_fill_probe_req - fill in all required fields and IE for probe request */ static u16 iwl3945_fill_probe_req(struct iwl_priv *priv, struct ieee80211_mgmt *frame, int left) { int len = 0; u8 *pos = NULL; u16 active_rates, ret_rates, cck_rates; /* Make sure there is enough space for the probe request, * two mandatory IEs and the data */ left -= 24; if (left < 0) return 0; len += 24; frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ); memcpy(frame->da, iwl_bcast_addr, ETH_ALEN); memcpy(frame->sa, priv->mac_addr, ETH_ALEN); memcpy(frame->bssid, iwl_bcast_addr, ETH_ALEN); frame->seq_ctrl = 0; /* fill in our indirect SSID IE */ /* ...next IE... */ left -= 2; if (left < 0) return 0; len += 2; pos = &(frame->u.probe_req.variable[0]); *pos++ = WLAN_EID_SSID; *pos++ = 0; /* fill in supported rate */ /* ...next IE... */ left -= 2; if (left < 0) return 0; /* ... fill it in... */ *pos++ = WLAN_EID_SUPP_RATES; *pos = 0; priv->active_rate = priv->rates_mask; active_rates = priv->active_rate; priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK; cck_rates = IWL_CCK_RATES_MASK & active_rates; ret_rates = iwl3945_supported_rate_to_ie(pos, cck_rates, priv->active_rate_basic, &left); active_rates &= ~ret_rates; ret_rates = iwl3945_supported_rate_to_ie(pos, active_rates, priv->active_rate_basic, &left); active_rates &= ~ret_rates; len += 2 + *pos; pos += (*pos) + 1; if (active_rates == 0) goto fill_end; /* fill in supported extended rate */ /* ...next IE... */ left -= 2; if (left < 0) return 0; /* ... fill it in... */ *pos++ = WLAN_EID_EXT_SUPP_RATES; *pos = 0; iwl3945_supported_rate_to_ie(pos, active_rates, priv->active_rate_basic, &left); if (*pos > 0) len += 2 + *pos; fill_end: return (u16)len; } /* * QoS support */ static int iwl3945_send_qos_params_command(struct iwl_priv *priv, struct iwl_qosparam_cmd *qos) { return iwl_send_cmd_pdu(priv, REPLY_QOS_PARAM, sizeof(struct iwl_qosparam_cmd), qos); } static void iwl3945_activate_qos(struct iwl_priv *priv, u8 force) { unsigned long flags; if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; spin_lock_irqsave(&priv->lock, flags); priv->qos_data.def_qos_parm.qos_flags = 0; if (priv->qos_data.qos_cap.q_AP.queue_request && !priv->qos_data.qos_cap.q_AP.txop_request) priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TXOP_TYPE_MSK; if (priv->qos_data.qos_active) priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_UPDATE_EDCA_MSK; spin_unlock_irqrestore(&priv->lock, flags); if (force || iwl3945_is_associated(priv)) { IWL_DEBUG_QOS("send QoS cmd with QoS active %d \n", priv->qos_data.qos_active); iwl3945_send_qos_params_command(priv, &(priv->qos_data.def_qos_parm)); } } /* * Power management (not Tx power!) functions */ #define MSEC_TO_USEC 1024 /* default power management (not Tx power) table values */ /* for TIM 0-10 */ static struct iwl_power_vec_entry range_0[IWL_POWER_MAX] = { {{NOSLP, SLP_TOUT(0), SLP_TOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0}, {{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0}, {{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0}, {{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0}, {{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1}, {{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1} }; /* for TIM > 10 */ static struct iwl_power_vec_entry range_1[IWL_POWER_MAX] = { {{NOSLP, SLP_TOUT(0), SLP_TOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0}, {{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 3, 4, 0xFF)}, 0}, {{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(2, 4, 6, 7, 0xFF)}, 0}, {{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 6, 9, 9, 0xFF)}, 0}, {{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0}, {{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(4, 7, 10, 10, 0xFF)}, 0} }; int iwl3945_power_init_handle(struct iwl_priv *priv) { int rc = 0, i; struct iwl_power_mgr *pow_data; int size = sizeof(struct iwl_power_vec_entry) * IWL_POWER_MAX; u16 pci_pm; IWL_DEBUG_POWER("Initialize power \n"); pow_data = &priv->power_data; memset(pow_data, 0, sizeof(*pow_data)); pow_data->dtim_period = 1; memcpy(&pow_data->pwr_range_0[0], &range_0[0], size); memcpy(&pow_data->pwr_range_1[0], &range_1[0], size); rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm); if (rc != 0) return 0; else { struct iwl_powertable_cmd *cmd; IWL_DEBUG_POWER("adjust power command flags\n"); for (i = 0; i < IWL_POWER_MAX; i++) { cmd = &pow_data->pwr_range_0[i].cmd; if (pci_pm & 0x1) cmd->flags &= ~IWL_POWER_PCI_PM_MSK; else cmd->flags |= IWL_POWER_PCI_PM_MSK; } } return rc; } static int iwl3945_update_power_cmd(struct iwl_priv *priv, struct iwl_powertable_cmd *cmd, u32 mode) { struct iwl_power_mgr *pow_data; struct iwl_power_vec_entry *range; u32 max_sleep = 0; int i; u8 period = 0; bool skip; if (mode > IWL_POWER_INDEX_5) { IWL_DEBUG_POWER("Error invalid power mode \n"); return -EINVAL; } pow_data = &priv->power_data; if (pow_data->dtim_period < 10) range = &pow_data->pwr_range_0[0]; else range = &pow_data->pwr_range_1[1]; memcpy(cmd, &range[mode].cmd, sizeof(struct iwl3945_powertable_cmd)); if (period == 0) { period = 1; skip = false; } else { skip = !!range[mode].no_dtim; } if (skip) { __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1]; max_sleep = (le32_to_cpu(slp_itrvl) / period) * period; cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK; } else { max_sleep = period; cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK; } for (i = 0; i < IWL_POWER_VEC_SIZE; i++) if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep) cmd->sleep_interval[i] = cpu_to_le32(max_sleep); IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags); IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout)); IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout)); IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n", le32_to_cpu(cmd->sleep_interval[0]), le32_to_cpu(cmd->sleep_interval[1]), le32_to_cpu(cmd->sleep_interval[2]), le32_to_cpu(cmd->sleep_interval[3]), le32_to_cpu(cmd->sleep_interval[4])); return 0; } static int iwl3945_send_power_mode(struct iwl_priv *priv, u32 mode) { u32 uninitialized_var(final_mode); int rc; struct iwl_powertable_cmd cmd; /* If on battery, set to 3, * if plugged into AC power, set to CAM ("continuously aware mode"), * else user level */ switch (mode) { case IWL39_POWER_BATTERY: final_mode = IWL_POWER_INDEX_3; break; case IWL39_POWER_AC: final_mode = IWL_POWER_MODE_CAM; break; default: final_mode = mode; break; } iwl3945_update_power_cmd(priv, &cmd, final_mode); /* FIXME use get_hcmd_size 3945 command is 4 bytes shorter */ rc = iwl_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(struct iwl3945_powertable_cmd), &cmd); if (final_mode == IWL_POWER_MODE_CAM) clear_bit(STATUS_POWER_PMI, &priv->status); else set_bit(STATUS_POWER_PMI, &priv->status); return rc; } #define MAX_UCODE_BEACON_INTERVAL 1024 #define INTEL_CONN_LISTEN_INTERVAL __constant_cpu_to_le16(0xA) static __le16 iwl3945_adjust_beacon_interval(u16 beacon_val) { u16 new_val = 0; u16 beacon_factor = 0; beacon_factor = (beacon_val + MAX_UCODE_BEACON_INTERVAL) / MAX_UCODE_BEACON_INTERVAL; new_val = beacon_val / beacon_factor; return cpu_to_le16(new_val); } static void iwl3945_setup_rxon_timing(struct iwl_priv *priv) { u64 interval_tm_unit; u64 tsf, result; unsigned long flags; struct ieee80211_conf *conf = NULL; u16 beacon_int = 0; conf = ieee80211_get_hw_conf(priv->hw); spin_lock_irqsave(&priv->lock, flags); priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp); priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL; tsf = priv->timestamp; beacon_int = priv->beacon_int; spin_unlock_irqrestore(&priv->lock, flags); if (priv->iw_mode == NL80211_IFTYPE_STATION) { if (beacon_int == 0) { priv->rxon_timing.beacon_interval = cpu_to_le16(100); priv->rxon_timing.beacon_init_val = cpu_to_le32(102400); } else { priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int); priv->rxon_timing.beacon_interval = iwl3945_adjust_beacon_interval( le16_to_cpu(priv->rxon_timing.beacon_interval)); } priv->rxon_timing.atim_window = 0; } else { priv->rxon_timing.beacon_interval = iwl3945_adjust_beacon_interval(conf->beacon_int); /* TODO: we need to get atim_window from upper stack * for now we set to 0 */ priv->rxon_timing.atim_window = 0; } interval_tm_unit = (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024); result = do_div(tsf, interval_tm_unit); priv->rxon_timing.beacon_init_val = cpu_to_le32((u32) ((u64) interval_tm_unit - result)); IWL_DEBUG_ASSOC ("beacon interval %d beacon timer %d beacon tim %d\n", le16_to_cpu(priv->rxon_timing.beacon_interval), le32_to_cpu(priv->rxon_timing.beacon_init_val), le16_to_cpu(priv->rxon_timing.atim_window)); } static int iwl3945_scan_initiate(struct iwl_priv *priv) { if (!iwl_is_ready_rf(priv)) { IWL_DEBUG_SCAN("Aborting scan due to not ready.\n"); return -EIO; } if (test_bit(STATUS_SCANNING, &priv->status)) { IWL_DEBUG_SCAN("Scan already in progress.\n"); return -EAGAIN; } if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) { IWL_DEBUG_SCAN("Scan request while abort pending. " "Queuing.\n"); return -EAGAIN; } IWL_DEBUG_INFO("Starting scan...\n"); if (priv->cfg->sku & IWL_SKU_G) priv->scan_bands |= BIT(IEEE80211_BAND_2GHZ); if (priv->cfg->sku & IWL_SKU_A) priv->scan_bands |= BIT(IEEE80211_BAND_5GHZ); set_bit(STATUS_SCANNING, &priv->status); priv->scan_start = jiffies; priv->scan_pass_start = priv->scan_start; queue_work(priv->workqueue, &priv->request_scan); return 0; } static int iwl3945_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt) { struct iwl3945_rxon_cmd *rxon = &priv->staging39_rxon; if (hw_decrypt) rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK; else rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK; return 0; } static void iwl3945_set_flags_for_phymode(struct iwl_priv *priv, enum ieee80211_band band) { if (band == IEEE80211_BAND_5GHZ) { priv->staging39_rxon.flags &= ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_CCK_MSK); priv->staging39_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK; } else { /* Copied from iwl3945_bg_post_associate() */ if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME) priv->staging39_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK; else priv->staging39_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK; if (priv->iw_mode == NL80211_IFTYPE_ADHOC) priv->staging39_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK; priv->staging39_rxon.flags |= RXON_FLG_BAND_24G_MSK; priv->staging39_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK; priv->staging39_rxon.flags &= ~RXON_FLG_CCK_MSK; } } /* * initialize rxon structure with default values from eeprom */ static void iwl3945_connection_init_rx_config(struct iwl_priv *priv, int mode) { const struct iwl_channel_info *ch_info; memset(&priv->staging39_rxon, 0, sizeof(priv->staging39_rxon)); switch (mode) { case NL80211_IFTYPE_AP: priv->staging39_rxon.dev_type = RXON_DEV_TYPE_AP; break; case NL80211_IFTYPE_STATION: priv->staging39_rxon.dev_type = RXON_DEV_TYPE_ESS; priv->staging39_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK; break; case NL80211_IFTYPE_ADHOC: priv->staging39_rxon.dev_type = RXON_DEV_TYPE_IBSS; priv->staging39_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK; priv->staging39_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK | RXON_FILTER_ACCEPT_GRP_MSK; break; case NL80211_IFTYPE_MONITOR: priv->staging39_rxon.dev_type = RXON_DEV_TYPE_SNIFFER; priv->staging39_rxon.filter_flags = RXON_FILTER_PROMISC_MSK | RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK; break; default: IWL_ERR(priv, "Unsupported interface type %d\n", mode); break; } #if 0 /* TODO: Figure out when short_preamble would be set and cache from * that */ if (!hw_to_local(priv->hw)->short_preamble) priv->staging39_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK; else priv->staging39_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK; #endif ch_info = iwl3945_get_channel_info(priv, priv->band, le16_to_cpu(priv->active39_rxon.channel)); if (!ch_info) ch_info = &priv->channel_info[0]; /* * in some case A channels are all non IBSS * in this case force B/G channel */ if ((mode == NL80211_IFTYPE_ADHOC) && !(is_channel_ibss(ch_info))) ch_info = &priv->channel_info[0]; priv->staging39_rxon.channel = cpu_to_le16(ch_info->channel); if (is_channel_a_band(ch_info)) priv->band = IEEE80211_BAND_5GHZ; else priv->band = IEEE80211_BAND_2GHZ; iwl3945_set_flags_for_phymode(priv, priv->band); priv->staging39_rxon.ofdm_basic_rates = (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF; priv->staging39_rxon.cck_basic_rates = (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF; } static int iwl3945_set_mode(struct iwl_priv *priv, int mode) { if (mode == NL80211_IFTYPE_ADHOC) { const struct iwl_channel_info *ch_info; ch_info = iwl3945_get_channel_info(priv, priv->band, le16_to_cpu(priv->staging39_rxon.channel)); if (!ch_info || !is_channel_ibss(ch_info)) { IWL_ERR(priv, "channel %d not IBSS channel\n", le16_to_cpu(priv->staging39_rxon.channel)); return -EINVAL; } } iwl3945_connection_init_rx_config(priv, mode); memcpy(priv->staging39_rxon.node_addr, priv->mac_addr, ETH_ALEN); iwl3945_clear_stations_table(priv); /* don't commit rxon if rf-kill is on*/ if (!iwl_is_ready_rf(priv)) return -EAGAIN; cancel_delayed_work(&priv->scan_check); if (iwl_scan_cancel_timeout(priv, 100)) { IWL_WARN(priv, "Aborted scan still in progress after 100ms\n"); IWL_DEBUG_MAC80211("leaving - scan abort failed.\n"); return -EAGAIN; } iwl3945_commit_rxon(priv); return 0; } static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv, struct ieee80211_tx_info *info, struct iwl_cmd *cmd, struct sk_buff *skb_frag, int last_frag) { struct iwl3945_tx_cmd *tx = (struct iwl3945_tx_cmd *)cmd->cmd.payload; struct iwl3945_hw_key *keyinfo = &priv->stations_39[info->control.hw_key->hw_key_idx].keyinfo; switch (keyinfo->alg) { case ALG_CCMP: tx->sec_ctl = TX_CMD_SEC_CCM; memcpy(tx->key, keyinfo->key, keyinfo->keylen); IWL_DEBUG_TX("tx_cmd with AES hwcrypto\n"); break; case ALG_TKIP: #if 0 tx->sec_ctl = TX_CMD_SEC_TKIP; if (last_frag) memcpy(tx->tkip_mic.byte, skb_frag->tail - 8, 8); else memset(tx->tkip_mic.byte, 0, 8); #endif break; case ALG_WEP: tx->sec_ctl = TX_CMD_SEC_WEP | (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT; if (keyinfo->keylen == 13) tx->sec_ctl |= TX_CMD_SEC_KEY128; memcpy(&tx->key[3], keyinfo->key, keyinfo->keylen); IWL_DEBUG_TX("Configuring packet for WEP encryption " "with key %d\n", info->control.hw_key->hw_key_idx); break; default: IWL_ERR(priv, "Unknown encode alg %d\n", keyinfo->alg); break; } } /* * handle build REPLY_TX command notification. */ static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv, struct iwl_cmd *cmd, struct ieee80211_tx_info *info, struct ieee80211_hdr *hdr, u8 std_id) { struct iwl3945_tx_cmd *tx = (struct iwl3945_tx_cmd *)cmd->cmd.payload; __le32 tx_flags = tx->tx_flags; __le16 fc = hdr->frame_control; u8 rc_flags = info->control.rates[0].flags; tx->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) { tx_flags |= TX_CMD_FLG_ACK_MSK; if (ieee80211_is_mgmt(fc)) tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; if (ieee80211_is_probe_resp(fc) && !(le16_to_cpu(hdr->seq_ctrl) & 0xf)) tx_flags |= TX_CMD_FLG_TSF_MSK; } else { tx_flags &= (~TX_CMD_FLG_ACK_MSK); tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; } tx->sta_id = std_id; if (ieee80211_has_morefrags(fc)) tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK; if (ieee80211_is_data_qos(fc)) { u8 *qc = ieee80211_get_qos_ctl(hdr); tx->tid_tspec = qc[0] & 0xf; tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK; } else { tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; } if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) { tx_flags |= TX_CMD_FLG_RTS_MSK; tx_flags &= ~TX_CMD_FLG_CTS_MSK; } else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) { tx_flags &= ~TX_CMD_FLG_RTS_MSK; tx_flags |= TX_CMD_FLG_CTS_MSK; } if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK)) tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK; tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK); if (ieee80211_is_mgmt(fc)) { if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) tx->timeout.pm_frame_timeout = cpu_to_le16(3); else tx->timeout.pm_frame_timeout = cpu_to_le16(2); } else { tx->timeout.pm_frame_timeout = 0; #ifdef CONFIG_IWL3945_LEDS priv->rxtxpackets += le16_to_cpu(cmd->cmd.tx.len); #endif } tx->driver_txop = 0; tx->tx_flags = tx_flags; tx->next_frame_len = 0; } /** * iwl3945_get_sta_id - Find station's index within station table */ static int iwl3945_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr) { int sta_id; u16 fc = le16_to_cpu(hdr->frame_control); /* If this frame is broadcast or management, use broadcast station id */ if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) || is_multicast_ether_addr(hdr->addr1)) return priv->hw_params.bcast_sta_id; switch (priv->iw_mode) { /* If we are a client station in a BSS network, use the special * AP station entry (that's the only station we communicate with) */ case NL80211_IFTYPE_STATION: return IWL_AP_ID; /* If we are an AP, then find the station, or use BCAST */ case NL80211_IFTYPE_AP: sta_id = iwl3945_hw_find_station(priv, hdr->addr1); if (sta_id != IWL_INVALID_STATION) return sta_id; return priv->hw_params.bcast_sta_id; /* If this frame is going out to an IBSS network, find the station, * or create a new station table entry */ case NL80211_IFTYPE_ADHOC: { /* Create new station table entry */ sta_id = iwl3945_hw_find_station(priv, hdr->addr1); if (sta_id != IWL_INVALID_STATION) return sta_id; sta_id = iwl3945_add_station(priv, hdr->addr1, 0, CMD_ASYNC); if (sta_id != IWL_INVALID_STATION) return sta_id; IWL_DEBUG_DROP("Station %pM not in station map. " "Defaulting to broadcast...\n", hdr->addr1); iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr)); return priv->hw_params.bcast_sta_id; } /* If we are in monitor mode, use BCAST. This is required for * packet injection. */ case NL80211_IFTYPE_MONITOR: return priv->hw_params.bcast_sta_id; default: IWL_WARN(priv, "Unknown mode of operation: %d\n", priv->iw_mode); return priv->hw_params.bcast_sta_id; } } /* * start REPLY_TX command process */ static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb) { struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); struct iwl3945_tx_cmd *tx; struct iwl_tx_queue *txq = NULL; struct iwl_queue *q = NULL; struct iwl_cmd *out_cmd = NULL; dma_addr_t phys_addr; dma_addr_t txcmd_phys; int txq_id = skb_get_queue_mapping(skb); u16 len, idx, len_org, hdr_len; u8 id; u8 unicast; u8 sta_id; u8 tid = 0; u16 seq_number = 0; __le16 fc; u8 wait_write_ptr = 0; u8 *qc = NULL; unsigned long flags; int rc; spin_lock_irqsave(&priv->lock, flags); if (iwl_is_rfkill(priv)) { IWL_DEBUG_DROP("Dropping - RF KILL\n"); goto drop_unlock; } if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) { IWL_ERR(priv, "ERROR: No TX rate available.\n"); goto drop_unlock; } unicast = !is_multicast_ether_addr(hdr->addr1); id = 0; fc = hdr->frame_control; #ifdef CONFIG_IWL3945_DEBUG if (ieee80211_is_auth(fc)) IWL_DEBUG_TX("Sending AUTH frame\n"); else if (ieee80211_is_assoc_req(fc)) IWL_DEBUG_TX("Sending ASSOC frame\n"); else if (ieee80211_is_reassoc_req(fc)) IWL_DEBUG_TX("Sending REASSOC frame\n"); #endif /* drop all data frame if we are not associated */ if (ieee80211_is_data(fc) && (priv->iw_mode != NL80211_IFTYPE_MONITOR) && /* packet injection */ (!iwl3945_is_associated(priv) || ((priv->iw_mode == NL80211_IFTYPE_STATION) && !priv->assoc_id))) { IWL_DEBUG_DROP("Dropping - !iwl3945_is_associated\n"); goto drop_unlock; } spin_unlock_irqrestore(&priv->lock, flags); hdr_len = ieee80211_hdrlen(fc); /* Find (or create) index into station table for destination station */ sta_id = iwl3945_get_sta_id(priv, hdr); if (sta_id == IWL_INVALID_STATION) { IWL_DEBUG_DROP("Dropping - INVALID STATION: %pM\n", hdr->addr1); goto drop; } IWL_DEBUG_RATE("station Id %d\n", sta_id); if (ieee80211_is_data_qos(fc)) { qc = ieee80211_get_qos_ctl(hdr); tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; seq_number = priv->stations_39[sta_id].tid[tid].seq_number & IEEE80211_SCTL_SEQ; hdr->seq_ctrl = cpu_to_le16(seq_number) | (hdr->seq_ctrl & __constant_cpu_to_le16(IEEE80211_SCTL_FRAG)); seq_number += 0x10; } /* Descriptor for chosen Tx queue */ txq = &priv->txq[txq_id]; q = &txq->q; spin_lock_irqsave(&priv->lock, flags); idx = get_cmd_index(q, q->write_ptr, 0); /* Set up driver data for this TFD */ memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info)); txq->txb[q->write_ptr].skb[0] = skb; /* Init first empty entry in queue's array of Tx/cmd buffers */ out_cmd = txq->cmd[idx]; tx = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload; memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr)); memset(tx, 0, sizeof(*tx)); /* * Set up the Tx-command (not MAC!) header. * Store the chosen Tx queue and TFD index within the sequence field; * after Tx, uCode's Tx response will return this value so driver can * locate the frame within the tx queue and do post-tx processing. */ out_cmd->hdr.cmd = REPLY_TX; out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) | INDEX_TO_SEQ(q->write_ptr))); /* Copy MAC header from skb into command buffer */ memcpy(tx->hdr, hdr, hdr_len); /* * Use the first empty entry in this queue's command buffer array * to contain the Tx command and MAC header concatenated together * (payload data will be in another buffer). * Size of this varies, due to varying MAC header length. * If end is not dword aligned, we'll have 2 extra bytes at the end * of the MAC header (device reads on dword boundaries). * We'll tell device about this padding later. */ len = sizeof(struct iwl3945_tx_cmd) + sizeof(struct iwl_cmd_header) + hdr_len; len_org = len; len = (len + 3) & ~3; if (len_org != len) len_org = 1; else len_org = 0; /* Physical address of this Tx command's header (not MAC header!), * within command buffer array. */ txcmd_phys = pci_map_single(priv->pci_dev, out_cmd, sizeof(struct iwl_cmd), PCI_DMA_TODEVICE); pci_unmap_addr_set(&out_cmd->meta, mapping, txcmd_phys); pci_unmap_len_set(&out_cmd->meta, len, sizeof(struct iwl_cmd)); /* Add buffer containing Tx command and MAC(!) header to TFD's * first entry */ txcmd_phys += offsetof(struct iwl_cmd, hdr); /* Add buffer containing Tx command and MAC(!) header to TFD's * first entry */ priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq, txcmd_phys, len, 1, 0); if (info->control.hw_key) iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, 0); /* Set up TFD's 2nd entry to point directly to remainder of skb, * if any (802.11 null frames have no payload). */ len = skb->len - hdr_len; if (len) { phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len, len, PCI_DMA_TODEVICE); priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq, phys_addr, len, 0, U32_PAD(len)); } /* Total # bytes to be transmitted */ len = (u16)skb->len; tx->len = cpu_to_le16(len); /* TODO need this for burst mode later on */ iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id); /* set is_hcca to 0; it probably will never be implemented */ iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0); tx->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK; tx->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK; if (!ieee80211_has_morefrags(hdr->frame_control)) { txq->need_update = 1; if (qc) priv->stations_39[sta_id].tid[tid].seq_number = seq_number; } else { wait_write_ptr = 1; txq->need_update = 0; } iwl_print_hex_dump(priv, IWL_DL_TX, tx, sizeof(*tx)); iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx->hdr, ieee80211_hdrlen(fc)); /* Tell device the write index *just past* this latest filled TFD */ q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd); rc = iwl_txq_update_write_ptr(priv, txq); spin_unlock_irqrestore(&priv->lock, flags); if (rc) return rc; if ((iwl_queue_space(q) < q->high_mark) && priv->mac80211_registered) { if (wait_write_ptr) { spin_lock_irqsave(&priv->lock, flags); txq->need_update = 1; iwl_txq_update_write_ptr(priv, txq); spin_unlock_irqrestore(&priv->lock, flags); } ieee80211_stop_queue(priv->hw, skb_get_queue_mapping(skb)); } return 0; drop_unlock: spin_unlock_irqrestore(&priv->lock, flags); drop: return -1; } static void iwl3945_set_rate(struct iwl_priv *priv) { const struct ieee80211_supported_band *sband = NULL; struct ieee80211_rate *rate; int i; sband = iwl_get_hw_mode(priv, priv->band); if (!sband) { IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n"); return; } priv->active_rate = 0; priv->active_rate_basic = 0; IWL_DEBUG_RATE("Setting rates for %s GHz\n", sband->band == IEEE80211_BAND_2GHZ ? "2.4" : "5"); for (i = 0; i < sband->n_bitrates; i++) { rate = &sband->bitrates[i]; if ((rate->hw_value < IWL_RATE_COUNT) && !(rate->flags & IEEE80211_CHAN_DISABLED)) { IWL_DEBUG_RATE("Adding rate index %d (plcp %d)\n", rate->hw_value, iwl3945_rates[rate->hw_value].plcp); priv->active_rate |= (1 << rate->hw_value); } } IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n", priv->active_rate, priv->active_rate_basic); /* * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK) * otherwise set it to the default of all CCK rates and 6, 12, 24 for * OFDM */ if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK) priv->staging39_rxon.cck_basic_rates = ((priv->active_rate_basic & IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF; else priv->staging39_rxon.cck_basic_rates = (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF; if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK) priv->staging39_rxon.ofdm_basic_rates = ((priv->active_rate_basic & (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >> IWL_FIRST_OFDM_RATE) & 0xFF; else priv->staging39_rxon.ofdm_basic_rates = (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF; } static void iwl3945_radio_kill_sw(struct iwl_priv *priv, int disable_radio) { unsigned long flags; if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status)) return; IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n", disable_radio ? "OFF" : "ON"); if (disable_radio) { iwl_scan_cancel(priv); /* FIXME: This is a workaround for AP */ if (priv->iw_mode != NL80211_IFTYPE_AP) { spin_lock_irqsave(&priv->lock, flags); iwl_write32(priv, CSR_UCODE_DRV_GP1_SET, CSR_UCODE_SW_BIT_RFKILL); spin_unlock_irqrestore(&priv->lock, flags); iwl_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0); set_bit(STATUS_RF_KILL_SW, &priv->status); } return; } spin_lock_irqsave(&priv->lock, flags); iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); clear_bit(STATUS_RF_KILL_SW, &priv->status); spin_unlock_irqrestore(&priv->lock, flags); /* wake up ucode */ msleep(10); spin_lock_irqsave(&priv->lock, flags); iwl_read32(priv, CSR_UCODE_DRV_GP1); if (!iwl_grab_nic_access(priv)) iwl_release_nic_access(priv); spin_unlock_irqrestore(&priv->lock, flags); if (test_bit(STATUS_RF_KILL_HW, &priv->status)) { IWL_DEBUG_RF_KILL("Can not turn radio back on - " "disabled by HW switch\n"); return; } if (priv->is_open) queue_work(priv->workqueue, &priv->restart); return; } void iwl3945_set_decrypted_flag(struct iwl_priv *priv, struct sk_buff *skb, u32 decrypt_res, struct ieee80211_rx_status *stats) { u16 fc = le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control); if (priv->active39_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK) return; if (!(fc & IEEE80211_FCTL_PROTECTED)) return; IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res); switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) { case RX_RES_STATUS_SEC_TYPE_TKIP: if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) == RX_RES_STATUS_BAD_ICV_MIC) stats->flag |= RX_FLAG_MMIC_ERROR; case RX_RES_STATUS_SEC_TYPE_WEP: case RX_RES_STATUS_SEC_TYPE_CCMP: if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) == RX_RES_STATUS_DECRYPT_OK) { IWL_DEBUG_RX("hw decrypt successfully!!!\n"); stats->flag |= RX_FLAG_DECRYPTED; } break; default: break; } } #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT #include "iwl-spectrum.h" #define BEACON_TIME_MASK_LOW 0x00FFFFFF #define BEACON_TIME_MASK_HIGH 0xFF000000 #define TIME_UNIT 1024 /* * extended beacon time format * time in usec will be changed into a 32-bit value in 8:24 format * the high 1 byte is the beacon counts * the lower 3 bytes is the time in usec within one beacon interval */ static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval) { u32 quot; u32 rem; u32 interval = beacon_interval * 1024; if (!interval || !usec) return 0; quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24); rem = (usec % interval) & BEACON_TIME_MASK_LOW; return (quot << 24) + rem; } /* base is usually what we get from ucode with each received frame, * the same as HW timer counter counting down */ static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval) { u32 base_low = base & BEACON_TIME_MASK_LOW; u32 addon_low = addon & BEACON_TIME_MASK_LOW; u32 interval = beacon_interval * TIME_UNIT; u32 res = (base & BEACON_TIME_MASK_HIGH) + (addon & BEACON_TIME_MASK_HIGH); if (base_low > addon_low) res += base_low - addon_low; else if (base_low < addon_low) { res += interval + base_low - addon_low; res += (1 << 24); } else res += (1 << 24); return cpu_to_le32(res); } static int iwl3945_get_measurement(struct iwl_priv *priv, struct ieee80211_measurement_params *params, u8 type) { struct iwl_spectrum_cmd spectrum; struct iwl_rx_packet *res; struct iwl_host_cmd cmd = { .id = REPLY_SPECTRUM_MEASUREMENT_CMD, .data = (void *)&spectrum, .meta.flags = CMD_WANT_SKB, }; u32 add_time = le64_to_cpu(params->start_time); int rc; int spectrum_resp_status; int duration = le16_to_cpu(params->duration); if (iwl3945_is_associated(priv)) add_time = iwl3945_usecs_to_beacons( le64_to_cpu(params->start_time) - priv->last_tsf, le16_to_cpu(priv->rxon_timing.beacon_interval)); memset(&spectrum, 0, sizeof(spectrum)); spectrum.channel_count = cpu_to_le16(1); spectrum.flags = RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK; spectrum.filter_flags = MEASUREMENT_FILTER_FLAG; cmd.len = sizeof(spectrum); spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len)); if (iwl3945_is_associated(priv)) spectrum.start_time = iwl3945_add_beacon_time(priv->last_beacon_time, add_time, le16_to_cpu(priv->rxon_timing.beacon_interval)); else spectrum.start_time = 0; spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT); spectrum.channels[0].channel = params->channel; spectrum.channels[0].type = type; if (priv->active39_rxon.flags & RXON_FLG_BAND_24G_MSK) spectrum.flags |= RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK; rc = iwl_send_cmd_sync(priv, &cmd); if (rc) return rc; res = (struct iwl_rx_packet *)cmd.meta.u.skb->data; if (res->hdr.flags & IWL_CMD_FAILED_MSK) { IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n"); rc = -EIO; } spectrum_resp_status = le16_to_cpu(res->u.spectrum.status); switch (spectrum_resp_status) { case 0: /* Command will be handled */ if (res->u.spectrum.id != 0xff) { IWL_DEBUG_INFO("Replaced existing measurement: %d\n", res->u.spectrum.id); priv->measurement_status &= ~MEASUREMENT_READY; } priv->measurement_status |= MEASUREMENT_ACTIVE; rc = 0; break; case 1: /* Command will not be handled */ rc = -EAGAIN; break; } dev_kfree_skb_any(cmd.meta.u.skb); return rc; } #endif static void iwl3945_rx_reply_alive(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { struct iwl_rx_packet *pkt = (void *)rxb->skb->data; struct iwl_alive_resp *palive; struct delayed_work *pwork; palive = &pkt->u.alive_frame; IWL_DEBUG_INFO("Alive ucode status 0x%08X revision " "0x%01X 0x%01X\n", palive->is_valid, palive->ver_type, palive->ver_subtype); if (palive->ver_subtype == INITIALIZE_SUBTYPE) { IWL_DEBUG_INFO("Initialization Alive received.\n"); memcpy(&priv->card_alive_init, &pkt->u.alive_frame, sizeof(struct iwl_alive_resp)); pwork = &priv->init_alive_start; } else { IWL_DEBUG_INFO("Runtime Alive received.\n"); memcpy(&priv->card_alive, &pkt->u.alive_frame, sizeof(struct iwl_alive_resp)); pwork = &priv->alive_start; iwl3945_disable_events(priv); } /* We delay the ALIVE response by 5ms to * give the HW RF Kill time to activate... */ if (palive->is_valid == UCODE_VALID_OK) queue_delayed_work(priv->workqueue, pwork, msecs_to_jiffies(5)); else IWL_WARN(priv, "uCode did not respond OK.\n"); } static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { #ifdef CONFIG_IWLWIFI_DEBUG struct iwl_rx_packet *pkt = (void *)rxb->skb->data; #endif IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status); return; } static void iwl3945_rx_reply_error(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { struct iwl_rx_packet *pkt = (void *)rxb->skb->data; IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) " "seq 0x%04X ser 0x%08X\n", le32_to_cpu(pkt->u.err_resp.error_type), get_cmd_string(pkt->u.err_resp.cmd_id), pkt->u.err_resp.cmd_id, le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num), le32_to_cpu(pkt->u.err_resp.error_info)); } #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x static void iwl3945_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { struct iwl_rx_packet *pkt = (void *)rxb->skb->data; struct iwl3945_rxon_cmd *rxon = (void *)&priv->active39_rxon; struct iwl_csa_notification *csa = &(pkt->u.csa_notif); IWL_DEBUG_11H("CSA notif: channel %d, status %d\n", le16_to_cpu(csa->channel), le32_to_cpu(csa->status)); rxon->channel = csa->channel; priv->staging39_rxon.channel = csa->channel; } static void iwl3945_rx_spectrum_measure_notif(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT struct iwl_rx_packet *pkt = (void *)rxb->skb->data; struct iwl_spectrum_notification *report = &(pkt->u.spectrum_notif); if (!report->state) { IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO, "Spectrum Measure Notification: Start\n"); return; } memcpy(&priv->measure_report, report, sizeof(*report)); priv->measurement_status |= MEASUREMENT_READY; #endif } static void iwl3945_rx_pm_sleep_notif(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { #ifdef CONFIG_IWL3945_DEBUG struct iwl_rx_packet *pkt = (void *)rxb->skb->data; struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif); IWL_DEBUG_RX("sleep mode: %d, src: %d\n", sleep->pm_sleep_mode, sleep->pm_wakeup_src); #endif } static void iwl3945_rx_pm_debug_statistics_notif(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { struct iwl_rx_packet *pkt = (void *)rxb->skb->data; IWL_DEBUG_RADIO("Dumping %d bytes of unhandled " "notification for %s:\n", le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd)); iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len)); } static void iwl3945_bg_beacon_update(struct work_struct *work) { struct iwl_priv *priv = container_of(work, struct iwl_priv, beacon_update); struct sk_buff *beacon; /* Pull updated AP beacon from mac80211. will fail if not in AP mode */ beacon = ieee80211_beacon_get(priv->hw, priv->vif); if (!beacon) { IWL_ERR(priv, "update beacon failed\n"); return; } mutex_lock(&priv->mutex); /* new beacon skb is allocated every time; dispose previous.*/ if (priv->ibss_beacon) dev_kfree_skb(priv->ibss_beacon); priv->ibss_beacon = beacon; mutex_unlock(&priv->mutex); iwl3945_send_beacon_cmd(priv); } static void iwl3945_rx_beacon_notif(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { #ifdef CONFIG_IWL3945_DEBUG struct iwl_rx_packet *pkt = (void *)rxb->skb->data; struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status); u8 rate = beacon->beacon_notify_hdr.rate; IWL_DEBUG_RX("beacon status %x retries %d iss %d " "tsf %d %d rate %d\n", le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK, beacon->beacon_notify_hdr.failure_frame, le32_to_cpu(beacon->ibss_mgr_status), le32_to_cpu(beacon->high_tsf), le32_to_cpu(beacon->low_tsf), rate); #endif if ((priv->iw_mode == NL80211_IFTYPE_AP) && (!test_bit(STATUS_EXIT_PENDING, &priv->status))) queue_work(priv->workqueue, &priv->beacon_update); } /* Service response to REPLY_SCAN_CMD (0x80) */ static void iwl3945_rx_reply_scan(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { #ifdef CONFIG_IWL3945_DEBUG struct iwl_rx_packet *pkt = (void *)rxb->skb->data; struct iwl_scanreq_notification *notif = (struct iwl_scanreq_notification *)pkt->u.raw; IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status); #endif } /* Service SCAN_START_NOTIFICATION (0x82) */ static void iwl3945_rx_scan_start_notif(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { struct iwl_rx_packet *pkt = (void *)rxb->skb->data; struct iwl_scanstart_notification *notif = (struct iwl_scanstart_notification *)pkt->u.raw; priv->scan_start_tsf = le32_to_cpu(notif->tsf_low); IWL_DEBUG_SCAN("Scan start: " "%d [802.11%s] " "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n", notif->channel, notif->band ? "bg" : "a", notif->tsf_high, notif->tsf_low, notif->status, notif->beacon_timer); } /* Service SCAN_RESULTS_NOTIFICATION (0x83) */ static void iwl3945_rx_scan_results_notif(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { #ifdef CONFIG_IWLWIFI_DEBUG struct iwl_rx_packet *pkt = (void *)rxb->skb->data; struct iwl_scanresults_notification *notif = (struct iwl_scanresults_notification *)pkt->u.raw; #endif IWL_DEBUG_SCAN("Scan ch.res: " "%d [802.11%s] " "(TSF: 0x%08X:%08X) - %d " "elapsed=%lu usec (%dms since last)\n", notif->channel, notif->band ? "bg" : "a", le32_to_cpu(notif->tsf_high), le32_to_cpu(notif->tsf_low), le32_to_cpu(notif->statistics[0]), le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf, jiffies_to_msecs(elapsed_jiffies (priv->last_scan_jiffies, jiffies))); priv->last_scan_jiffies = jiffies; priv->next_scan_jiffies = 0; } /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */ static void iwl3945_rx_scan_complete_notif(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { #ifdef CONFIG_IWLWIFI_DEBUG struct iwl_rx_packet *pkt = (void *)rxb->skb->data; struct iwl_scancomplete_notification *scan_notif = (void *)pkt->u.raw; #endif IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n", scan_notif->scanned_channels, scan_notif->tsf_low, scan_notif->tsf_high, scan_notif->status); /* The HW is no longer scanning */ clear_bit(STATUS_SCAN_HW, &priv->status); /* The scan completion notification came in, so kill that timer... */ cancel_delayed_work(&priv->scan_check); IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n", (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) ? "2.4" : "5.2", jiffies_to_msecs(elapsed_jiffies (priv->scan_pass_start, jiffies))); /* Remove this scanned band from the list of pending * bands to scan, band G precedes A in order of scanning * as seen in iwl3945_bg_request_scan */ if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) priv->scan_bands &= ~BIT(IEEE80211_BAND_2GHZ); else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) priv->scan_bands &= ~BIT(IEEE80211_BAND_5GHZ); /* If a request to abort was given, or the scan did not succeed * then we reset the scan state machine and terminate, * re-queuing another scan if one has been requested */ if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) { IWL_DEBUG_INFO("Aborted scan completed.\n"); clear_bit(STATUS_SCAN_ABORTING, &priv->status); } else { /* If there are more bands on this scan pass reschedule */ if (priv->scan_bands > 0) goto reschedule; } priv->last_scan_jiffies = jiffies; priv->next_scan_jiffies = 0; IWL_DEBUG_INFO("Setting scan to off\n"); clear_bit(STATUS_SCANNING, &priv->status); IWL_DEBUG_INFO("Scan took %dms\n", jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies))); queue_work(priv->workqueue, &priv->scan_completed); return; reschedule: priv->scan_pass_start = jiffies; queue_work(priv->workqueue, &priv->request_scan); } /* Handle notification from uCode that card's power state is changing * due to software, hardware, or critical temperature RFKILL */ static void iwl3945_rx_card_state_notif(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { struct iwl_rx_packet *pkt = (void *)rxb->skb->data; u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags); unsigned long status = priv->status; IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n", (flags & HW_CARD_DISABLED) ? "Kill" : "On", (flags & SW_CARD_DISABLED) ? "Kill" : "On"); iwl_write32(priv, CSR_UCODE_DRV_GP1_SET, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); if (flags & HW_CARD_DISABLED) set_bit(STATUS_RF_KILL_HW, &priv->status); else clear_bit(STATUS_RF_KILL_HW, &priv->status); if (flags & SW_CARD_DISABLED) set_bit(STATUS_RF_KILL_SW, &priv->status); else clear_bit(STATUS_RF_KILL_SW, &priv->status); iwl_scan_cancel(priv); if ((test_bit(STATUS_RF_KILL_HW, &status) != test_bit(STATUS_RF_KILL_HW, &priv->status)) || (test_bit(STATUS_RF_KILL_SW, &status) != test_bit(STATUS_RF_KILL_SW, &priv->status))) queue_work(priv->workqueue, &priv->rf_kill); else wake_up_interruptible(&priv->wait_command_queue); } /** * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks * * Setup the RX handlers for each of the reply types sent from the uCode * to the host. * * This function chains into the hardware specific files for them to setup * any hardware specific handlers as well. */ static void iwl3945_setup_rx_handlers(struct iwl_priv *priv) { priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive; priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta; priv->rx_handlers[REPLY_ERROR] = iwl3945_rx_reply_error; priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl3945_rx_csa; priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] = iwl3945_rx_spectrum_measure_notif; priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl3945_rx_pm_sleep_notif; priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] = iwl3945_rx_pm_debug_statistics_notif; priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif; /* * The same handler is used for both the REPLY to a discrete * statistics request from the host as well as for the periodic * statistics notifications (after received beacons) from the uCode. */ priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics; priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics; priv->rx_handlers[REPLY_SCAN_CMD] = iwl3945_rx_reply_scan; priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl3945_rx_scan_start_notif; priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] = iwl3945_rx_scan_results_notif; priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] = iwl3945_rx_scan_complete_notif; priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif; /* Set up hardware specific Rx handlers */ iwl3945_hw_rx_handler_setup(priv); } /** * iwl3945_cmd_queue_reclaim - Reclaim CMD queue entries * When FW advances 'R' index, all entries between old and new 'R' index * need to be reclaimed. */ static void iwl3945_cmd_queue_reclaim(struct iwl_priv *priv, int txq_id, int index) { struct iwl_tx_queue *txq = &priv->txq[txq_id]; struct iwl_queue *q = &txq->q; int nfreed = 0; if ((index >= q->n_bd) || (iwl_queue_used(q, index) == 0)) { IWL_ERR(priv, "Read index for DMA queue txq id (%d), index %d, " "is out of range [0-%d] %d %d.\n", txq_id, index, q->n_bd, q->write_ptr, q->read_ptr); return; } for (index = iwl_queue_inc_wrap(index, q->n_bd); q->read_ptr != index; q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) { if (nfreed > 1) { IWL_ERR(priv, "HCMD skipped: index (%d) %d %d\n", index, q->write_ptr, q->read_ptr); queue_work(priv->workqueue, &priv->restart); break; } nfreed++; } } /** * iwl3945_tx_cmd_complete - Pull unused buffers off the queue and reclaim them * @rxb: Rx buffer to reclaim * * If an Rx buffer has an async callback associated with it the callback * will be executed. The attached skb (if present) will only be freed * if the callback returns 1 */ static void iwl3945_tx_cmd_complete(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data; u16 sequence = le16_to_cpu(pkt->hdr.sequence); int txq_id = SEQ_TO_QUEUE(sequence); int index = SEQ_TO_INDEX(sequence); int huge = !!(pkt->hdr.sequence & SEQ_HUGE_FRAME); int cmd_index; struct iwl_cmd *cmd; if (WARN(txq_id != IWL_CMD_QUEUE_NUM, "wrong command queue %d, sequence 0x%X readp=%d writep=%d\n", txq_id, sequence, priv->txq[IWL_CMD_QUEUE_NUM].q.read_ptr, priv->txq[IWL_CMD_QUEUE_NUM].q.write_ptr)) { iwl_print_hex_dump(priv, IWL_DL_INFO , rxb, 32); return; } cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge); cmd = priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index]; /* Input error checking is done when commands are added to queue. */ if (cmd->meta.flags & CMD_WANT_SKB) { cmd->meta.source->u.skb = rxb->skb; rxb->skb = NULL; } else if (cmd->meta.u.callback && !cmd->meta.u.callback(priv, cmd, rxb->skb)) rxb->skb = NULL; iwl3945_cmd_queue_reclaim(priv, txq_id, index); if (!(cmd->meta.flags & CMD_ASYNC)) { clear_bit(STATUS_HCMD_ACTIVE, &priv->status); wake_up_interruptible(&priv->wait_command_queue); } } /************************** RX-FUNCTIONS ****************************/ /* * Rx theory of operation * * The host allocates 32 DMA target addresses and passes the host address * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is * 0 to 31 * * Rx Queue Indexes * The host/firmware share two index registers for managing the Rx buffers. * * The READ index maps to the first position that the firmware may be writing * to -- the driver can read up to (but not including) this position and get * good data. * The READ index is managed by the firmware once the card is enabled. * * The WRITE index maps to the last position the driver has read from -- the * position preceding WRITE is the last slot the firmware can place a packet. * * The queue is empty (no good data) if WRITE = READ - 1, and is full if * WRITE = READ. * * During initialization, the host sets up the READ queue position to the first * INDEX position, and WRITE to the last (READ - 1 wrapped) * * When the firmware places a packet in a buffer, it will advance the READ index * and fire the RX interrupt. The driver can then query the READ index and * process as many packets as possible, moving the WRITE index forward as it * resets the Rx queue buffers with new memory. * * The management in the driver is as follows: * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free. When * iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled * to replenish the iwl->rxq->rx_free. * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the * iwl->rxq is replenished and the READ INDEX is updated (updating the * 'processed' and 'read' driver indexes as well) * + A received packet is processed and handed to the kernel network stack, * detached from the iwl->rxq. The driver 'processed' index is updated. * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free * list. If there are no allocated buffers in iwl->rxq->rx_free, the READ * INDEX is not incremented and iwl->status(RX_STALLED) is set. If there * were enough free buffers and RX_STALLED is set it is cleared. * * * Driver sequence: * * iwl3945_rx_replenish() Replenishes rx_free list from rx_used, and calls * iwl3945_rx_queue_restock * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx * queue, updates firmware pointers, and updates * the WRITE index. If insufficient rx_free buffers * are available, schedules iwl3945_rx_replenish * * -- enable interrupts -- * ISR - iwl3945_rx() Detach iwl_rx_mem_buffers from pool up to the * READ INDEX, detaching the SKB from the pool. * Moves the packet buffer from queue to rx_used. * Calls iwl3945_rx_queue_restock to refill any empty * slots. * ... * */ /** * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr */ static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv, dma_addr_t dma_addr) { return cpu_to_le32((u32)dma_addr); } /** * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool * * If there are slots in the RX queue that need to be restocked, * and we have free pre-allocated buffers, fill the ranks as much * as we can, pulling from rx_free. * * This moves the 'write' index forward to catch up with 'processed', and * also updates the memory address in the firmware to reference the new * target buffer. */ static int iwl3945_rx_queue_restock(struct iwl_priv *priv) { struct iwl_rx_queue *rxq = &priv->rxq; struct list_head *element; struct iwl_rx_mem_buffer *rxb; unsigned long flags; int write, rc; spin_lock_irqsave(&rxq->lock, flags); write = rxq->write & ~0x7; while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) { /* Get next free Rx buffer, remove from free list */ element = rxq->rx_free.next; rxb = list_entry(element, struct iwl_rx_mem_buffer, list); list_del(element); /* Point to Rx buffer via next RBD in circular buffer */ rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->real_dma_addr); rxq->queue[rxq->write] = rxb; rxq->write = (rxq->write + 1) & RX_QUEUE_MASK; rxq->free_count--; } spin_unlock_irqrestore(&rxq->lock, flags); /* If the pre-allocated buffer pool is dropping low, schedule to * refill it */ if (rxq->free_count <= RX_LOW_WATERMARK) queue_work(priv->workqueue, &priv->rx_replenish); /* If we've added more space for the firmware to place data, tell it. * Increment device's write pointer in multiples of 8. */ if ((write != (rxq->write & ~0x7)) || (abs(rxq->write - rxq->read) > 7)) { spin_lock_irqsave(&rxq->lock, flags); rxq->need_update = 1; spin_unlock_irqrestore(&rxq->lock, flags); rc = iwl_rx_queue_update_write_ptr(priv, rxq); if (rc) return rc; } return 0; } /** * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free * * When moving to rx_free an SKB is allocated for the slot. * * Also restock the Rx queue via iwl3945_rx_queue_restock. * This is called as a scheduled work item (except for during initialization) */ static void iwl3945_rx_allocate(struct iwl_priv *priv) { struct iwl_rx_queue *rxq = &priv->rxq; struct list_head *element; struct iwl_rx_mem_buffer *rxb; unsigned long flags; spin_lock_irqsave(&rxq->lock, flags); while (!list_empty(&rxq->rx_used)) { element = rxq->rx_used.next; rxb = list_entry(element, struct iwl_rx_mem_buffer, list); /* Alloc a new receive buffer */ rxb->skb = alloc_skb(priv->hw_params.rx_buf_size, __GFP_NOWARN | GFP_ATOMIC); if (!rxb->skb) { if (net_ratelimit()) IWL_CRIT(priv, ": Can not allocate SKB buffers\n"); /* We don't reschedule replenish work here -- we will * call the restock method and if it still needs * more buffers it will schedule replenish */ break; } /* If radiotap head is required, reserve some headroom here. * The physical head count is a variable rx_stats->phy_count. * We reserve 4 bytes here. Plus these extra bytes, the * headroom of the physical head should be enough for the * radiotap head that iwl3945 supported. See iwl3945_rt. */ skb_reserve(rxb->skb, 4); priv->alloc_rxb_skb++; list_del(element); /* Get physical address of RB/SKB */ rxb->real_dma_addr = pci_map_single(priv->pci_dev, rxb->skb->data, priv->hw_params.rx_buf_size, PCI_DMA_FROMDEVICE); list_add_tail(&rxb->list, &rxq->rx_free); rxq->free_count++; } spin_unlock_irqrestore(&rxq->lock, flags); } /* * this should be called while priv->lock is locked */ static void __iwl3945_rx_replenish(void *data) { struct iwl_priv *priv = data; iwl3945_rx_allocate(priv); iwl3945_rx_queue_restock(priv); } void iwl3945_rx_replenish(void *data) { struct iwl_priv *priv = data; unsigned long flags; iwl3945_rx_allocate(priv); spin_lock_irqsave(&priv->lock, flags); iwl3945_rx_queue_restock(priv); spin_unlock_irqrestore(&priv->lock, flags); } /* Convert linear signal-to-noise ratio into dB */ static u8 ratio2dB[100] = { /* 0 1 2 3 4 5 6 7 8 9 */ 0, 0, 6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */ 20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */ 26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */ 29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */ 32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */ 34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */ 36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */ 37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */ 38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */ 39, 39, 39, 39, 39, 40, 40, 40, 40, 40 /* 90 - 99 */ }; /* Calculates a relative dB value from a ratio of linear * (i.e. not dB) signal levels. * Conversion assumes that levels are voltages (20*log), not powers (10*log). */ int iwl3945_calc_db_from_ratio(int sig_ratio) { /* 1000:1 or higher just report as 60 dB */ if (sig_ratio >= 1000) return 60; /* 100:1 or higher, divide by 10 and use table, * add 20 dB to make up for divide by 10 */ if (sig_ratio >= 100) return 20 + (int)ratio2dB[sig_ratio/10]; /* We shouldn't see this */ if (sig_ratio < 1) return 0; /* Use table for ratios 1:1 - 99:1 */ return (int)ratio2dB[sig_ratio]; } #define PERFECT_RSSI (-20) /* dBm */ #define WORST_RSSI (-95) /* dBm */ #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI) /* Calculate an indication of rx signal quality (a percentage, not dBm!). * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info * about formulas used below. */ int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm) { int sig_qual; int degradation = PERFECT_RSSI - rssi_dbm; /* If we get a noise measurement, use signal-to-noise ratio (SNR) * as indicator; formula is (signal dbm - noise dbm). * SNR at or above 40 is a great signal (100%). * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator. * Weakest usable signal is usually 10 - 15 dB SNR. */ if (noise_dbm) { if (rssi_dbm - noise_dbm >= 40) return 100; else if (rssi_dbm < noise_dbm) return 0; sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2; /* Else use just the signal level. * This formula is a least squares fit of data points collected and * compared with a reference system that had a percentage (%) display * for signal quality. */ } else sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation * (15 * RSSI_RANGE + 62 * degradation)) / (RSSI_RANGE * RSSI_RANGE); if (sig_qual > 100) sig_qual = 100; else if (sig_qual < 1) sig_qual = 0; return sig_qual; } /** * iwl3945_rx_handle - Main entry function for receiving responses from uCode * * Uses the priv->rx_handlers callback function array to invoke * the appropriate handlers, including command responses, * frame-received notifications, and other notifications. */ static void iwl3945_rx_handle(struct iwl_priv *priv) { struct iwl_rx_mem_buffer *rxb; struct iwl_rx_packet *pkt; struct iwl_rx_queue *rxq = &priv->rxq; u32 r, i; int reclaim; unsigned long flags; u8 fill_rx = 0; u32 count = 8; /* uCode's read index (stored in shared DRAM) indicates the last Rx * buffer that the driver may process (last buffer filled by ucode). */ r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF; i = rxq->read; if (iwl_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2)) fill_rx = 1; /* Rx interrupt, but nothing sent from uCode */ if (i == r) IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i); while (i != r) { rxb = rxq->queue[i]; /* If an RXB doesn't have a Rx queue slot associated with it, * then a bug has been introduced in the queue refilling * routines -- catch it here */ BUG_ON(rxb == NULL); rxq->queue[i] = NULL; pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->real_dma_addr, priv->hw_params.rx_buf_size, PCI_DMA_FROMDEVICE); pkt = (struct iwl_rx_packet *)rxb->skb->data; /* Reclaim a command buffer only if this packet is a response * to a (driver-originated) command. * If the packet (e.g. Rx frame) originated from uCode, * there is no command buffer to reclaim. * Ucode should set SEQ_RX_FRAME bit if ucode-originated, * but apparently a few don't get set; catch them here. */ reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) && (pkt->hdr.cmd != STATISTICS_NOTIFICATION) && (pkt->hdr.cmd != REPLY_TX); /* Based on type of command response or notification, * handle those that need handling via function in * rx_handlers table. See iwl3945_setup_rx_handlers() */ if (priv->rx_handlers[pkt->hdr.cmd]) { IWL_DEBUG(IWL_DL_HCMD | IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d, %s, 0x%02x\n", r, i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd); priv->rx_handlers[pkt->hdr.cmd] (priv, rxb); } else { /* No handling needed */ IWL_DEBUG(IWL_DL_HCMD | IWL_DL_RX | IWL_DL_ISR, "r %d i %d No handler needed for %s, 0x%02x\n", r, i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd); } if (reclaim) { /* Invoke any callbacks, transfer the skb to caller, and * fire off the (possibly) blocking iwl_send_cmd() * as we reclaim the driver command queue */ if (rxb && rxb->skb) iwl3945_tx_cmd_complete(priv, rxb); else IWL_WARN(priv, "Claim null rxb?\n"); } /* For now we just don't re-use anything. We can tweak this * later to try and re-use notification packets and SKBs that * fail to Rx correctly */ if (rxb->skb != NULL) { priv->alloc_rxb_skb--; dev_kfree_skb_any(rxb->skb); rxb->skb = NULL; } pci_unmap_single(priv->pci_dev, rxb->real_dma_addr, priv->hw_params.rx_buf_size, PCI_DMA_FROMDEVICE); spin_lock_irqsave(&rxq->lock, flags); list_add_tail(&rxb->list, &priv->rxq.rx_used); spin_unlock_irqrestore(&rxq->lock, flags); i = (i + 1) & RX_QUEUE_MASK; /* If there are a lot of unused frames, * restock the Rx queue so ucode won't assert. */ if (fill_rx) { count++; if (count >= 8) { priv->rxq.read = i; __iwl3945_rx_replenish(priv); count = 0; } } } /* Backtrack one entry */ priv->rxq.read = i; iwl3945_rx_queue_restock(priv); } #ifdef CONFIG_IWL3945_DEBUG static void iwl3945_print_rx_config_cmd(struct iwl_priv *priv, struct iwl3945_rxon_cmd *rxon) { IWL_DEBUG_RADIO("RX CONFIG:\n"); iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon)); IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel)); IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags)); IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n", le32_to_cpu(rxon->filter_flags)); IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type); IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n", rxon->ofdm_basic_rates); IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates); IWL_DEBUG_RADIO("u8[6] node_addr: %pM\n", rxon->node_addr); IWL_DEBUG_RADIO("u8[6] bssid_addr: %pM\n", rxon->bssid_addr); IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id)); } #endif static void iwl3945_enable_interrupts(struct iwl_priv *priv) { IWL_DEBUG_ISR("Enabling interrupts\n"); set_bit(STATUS_INT_ENABLED, &priv->status); iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK); } /* call this function to flush any scheduled tasklet */ static inline void iwl_synchronize_irq(struct iwl_priv *priv) { /* wait to make sure we flush pending tasklet*/ synchronize_irq(priv->pci_dev->irq); tasklet_kill(&priv->irq_tasklet); } static inline void iwl3945_disable_interrupts(struct iwl_priv *priv) { clear_bit(STATUS_INT_ENABLED, &priv->status); /* disable interrupts from uCode/NIC to host */ iwl_write32(priv, CSR_INT_MASK, 0x00000000); /* acknowledge/clear/reset any interrupts still pending * from uCode or flow handler (Rx/Tx DMA) */ iwl_write32(priv, CSR_INT, 0xffffffff); iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff); IWL_DEBUG_ISR("Disabled interrupts\n"); } static const char *desc_lookup(int i) { switch (i) { case 1: return "FAIL"; case 2: return "BAD_PARAM"; case 3: return "BAD_CHECKSUM"; case 4: return "NMI_INTERRUPT"; case 5: return "SYSASSERT"; case 6: return "FATAL_ERROR"; } return "UNKNOWN"; } #define ERROR_START_OFFSET (1 * sizeof(u32)) #define ERROR_ELEM_SIZE (7 * sizeof(u32)) static void iwl3945_dump_nic_error_log(struct iwl_priv *priv) { u32 i; u32 desc, time, count, base, data1; u32 blink1, blink2, ilink1, ilink2; int rc; base = le32_to_cpu(priv->card_alive.error_event_table_ptr); if (!iwl3945_hw_valid_rtc_data_addr(base)) { IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base); return; } rc = iwl_grab_nic_access(priv); if (rc) { IWL_WARN(priv, "Can not read from adapter at this time.\n"); return; } count = iwl_read_targ_mem(priv, base); if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) { IWL_ERR(priv, "Start IWL Error Log Dump:\n"); IWL_ERR(priv, "Status: 0x%08lX, count: %d\n", priv->status, count); } IWL_ERR(priv, "Desc Time asrtPC blink2 " "ilink1 nmiPC Line\n"); for (i = ERROR_START_OFFSET; i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET; i += ERROR_ELEM_SIZE) { desc = iwl_read_targ_mem(priv, base + i); time = iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32)); blink1 = iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32)); blink2 = iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32)); ilink1 = iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32)); ilink2 = iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32)); data1 = iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32)); IWL_ERR(priv, "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n", desc_lookup(desc), desc, time, blink1, blink2, ilink1, ilink2, data1); } iwl_release_nic_access(priv); } #define EVENT_START_OFFSET (6 * sizeof(u32)) /** * iwl3945_print_event_log - Dump error event log to syslog * * NOTE: Must be called with iwl_grab_nic_access() already obtained! */ static void iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx, u32 num_events, u32 mode) { u32 i; u32 base; /* SRAM byte address of event log header */ u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */ u32 ptr; /* SRAM byte address of log data */ u32 ev, time, data; /* event log data */ if (num_events == 0) return; base = le32_to_cpu(priv->card_alive.log_event_table_ptr); if (mode == 0) event_size = 2 * sizeof(u32); else event_size = 3 * sizeof(u32); ptr = base + EVENT_START_OFFSET + (start_idx * event_size); /* "time" is actually "data" for mode 0 (no timestamp). * place event id # at far right for easier visual parsing. */ for (i = 0; i < num_events; i++) { ev = iwl_read_targ_mem(priv, ptr); ptr += sizeof(u32); time = iwl_read_targ_mem(priv, ptr); ptr += sizeof(u32); if (mode == 0) { /* data, ev */ IWL_ERR(priv, "0x%08x\t%04u\n", time, ev); } else { data = iwl_read_targ_mem(priv, ptr); ptr += sizeof(u32); IWL_ERR(priv, "%010u\t0x%08x\t%04u\n", time, data, ev); } } } static void iwl3945_dump_nic_event_log(struct iwl_priv *priv) { int rc; u32 base; /* SRAM byte address of event log header */ u32 capacity; /* event log capacity in # entries */ u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */ u32 num_wraps; /* # times uCode wrapped to top of log */ u32 next_entry; /* index of next entry to be written by uCode */ u32 size; /* # entries that we'll print */ base = le32_to_cpu(priv->card_alive.log_event_table_ptr); if (!iwl3945_hw_valid_rtc_data_addr(base)) { IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base); return; } rc = iwl_grab_nic_access(priv); if (rc) { IWL_WARN(priv, "Can not read from adapter at this time.\n"); return; } /* event log header */ capacity = iwl_read_targ_mem(priv, base); mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32))); num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32))); next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32))); size = num_wraps ? capacity : next_entry; /* bail out if nothing in log */ if (size == 0) { IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n"); iwl_release_nic_access(priv); return; } IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n", size, num_wraps); /* if uCode has wrapped back to top of log, start at the oldest entry, * i.e the next one that uCode would fill. */ if (num_wraps) iwl3945_print_event_log(priv, next_entry, capacity - next_entry, mode); /* (then/else) start at top of log */ iwl3945_print_event_log(priv, 0, next_entry, mode); iwl_release_nic_access(priv); } /** * iwl3945_irq_handle_error - called for HW or SW error interrupt from card */ static void iwl3945_irq_handle_error(struct iwl_priv *priv) { /* Set the FW error flag -- cleared on iwl3945_down */ set_bit(STATUS_FW_ERROR, &priv->status); /* Cancel currently queued command. */ clear_bit(STATUS_HCMD_ACTIVE, &priv->status); #ifdef CONFIG_IWL3945_DEBUG if (priv->debug_level & IWL_DL_FW_ERRORS) { iwl3945_dump_nic_error_log(priv); iwl3945_dump_nic_event_log(priv); iwl3945_print_rx_config_cmd(priv, &priv->staging39_rxon); } #endif wake_up_interruptible(&priv->wait_command_queue); /* Keep the restart process from trying to send host * commands by clearing the INIT status bit */ clear_bit(STATUS_READY, &priv->status); if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) { IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS, "Restarting adapter due to uCode error.\n"); if (iwl3945_is_associated(priv)) { memcpy(&priv->recovery39_rxon, &priv->active39_rxon, sizeof(priv->recovery39_rxon)); priv->error_recovering = 1; } queue_work(priv->workqueue, &priv->restart); } } static void iwl3945_error_recovery(struct iwl_priv *priv) { unsigned long flags; memcpy(&priv->staging39_rxon, &priv->recovery39_rxon, sizeof(priv->staging39_rxon)); priv->staging39_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK; iwl3945_commit_rxon(priv); iwl3945_add_station(priv, priv->bssid, 1, 0); spin_lock_irqsave(&priv->lock, flags); priv->assoc_id = le16_to_cpu(priv->staging39_rxon.assoc_id); priv->error_recovering = 0; spin_unlock_irqrestore(&priv->lock, flags); } static void iwl3945_irq_tasklet(struct iwl_priv *priv) { u32 inta, handled = 0; u32 inta_fh; unsigned long flags; #ifdef CONFIG_IWL3945_DEBUG u32 inta_mask; #endif spin_lock_irqsave(&priv->lock, flags); /* Ack/clear/reset pending uCode interrupts. * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS, * and will clear only when CSR_FH_INT_STATUS gets cleared. */ inta = iwl_read32(priv, CSR_INT); iwl_write32(priv, CSR_INT, inta); /* Ack/clear/reset pending flow-handler (DMA) interrupts. * Any new interrupts that happen after this, either while we're * in this tasklet, or later, will show up in next ISR/tasklet. */ inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS); iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh); #ifdef CONFIG_IWL3945_DEBUG if (priv->debug_level & IWL_DL_ISR) { /* just for debug */ inta_mask = iwl_read32(priv, CSR_INT_MASK); IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta, inta_mask, inta_fh); } #endif /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not * atomic, make sure that inta covers all the interrupts that * we've discovered, even if FH interrupt came in just after * reading CSR_INT. */ if (inta_fh & CSR39_FH_INT_RX_MASK) inta |= CSR_INT_BIT_FH_RX; if (inta_fh & CSR39_FH_INT_TX_MASK) inta |= CSR_INT_BIT_FH_TX; /* Now service all interrupt bits discovered above. */ if (inta & CSR_INT_BIT_HW_ERR) { IWL_ERR(priv, "Microcode HW error detected. Restarting.\n"); /* Tell the device to stop sending interrupts */ iwl3945_disable_interrupts(priv); iwl3945_irq_handle_error(priv); handled |= CSR_INT_BIT_HW_ERR; spin_unlock_irqrestore(&priv->lock, flags); return; } #ifdef CONFIG_IWL3945_DEBUG if (priv->debug_level & (IWL_DL_ISR)) { /* NIC fires this, but we don't use it, redundant with WAKEUP */ if (inta & CSR_INT_BIT_SCD) IWL_DEBUG_ISR("Scheduler finished to transmit " "the frame/frames.\n"); /* Alive notification via Rx interrupt will do the real work */ if (inta & CSR_INT_BIT_ALIVE) IWL_DEBUG_ISR("Alive interrupt\n"); } #endif /* Safely ignore these bits for debug checks below */ inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE); /* Error detected by uCode */ if (inta & CSR_INT_BIT_SW_ERR) { IWL_ERR(priv, "Microcode SW error detected. " "Restarting 0x%X.\n", inta); iwl3945_irq_handle_error(priv); handled |= CSR_INT_BIT_SW_ERR; } /* uCode wakes up after power-down sleep */ if (inta & CSR_INT_BIT_WAKEUP) { IWL_DEBUG_ISR("Wakeup interrupt\n"); iwl_rx_queue_update_write_ptr(priv, &priv->rxq); iwl_txq_update_write_ptr(priv, &priv->txq[0]); iwl_txq_update_write_ptr(priv, &priv->txq[1]); iwl_txq_update_write_ptr(priv, &priv->txq[2]); iwl_txq_update_write_ptr(priv, &priv->txq[3]); iwl_txq_update_write_ptr(priv, &priv->txq[4]); iwl_txq_update_write_ptr(priv, &priv->txq[5]); handled |= CSR_INT_BIT_WAKEUP; } /* All uCode command responses, including Tx command responses, * Rx "responses" (frame-received notification), and other * notifications from uCode come through here*/ if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) { iwl3945_rx_handle(priv); handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX); } if (inta & CSR_INT_BIT_FH_TX) { IWL_DEBUG_ISR("Tx interrupt\n"); iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6)); if (!iwl_grab_nic_access(priv)) { iwl_write_direct32(priv, FH39_TCSR_CREDIT (FH39_SRVC_CHNL), 0x0); iwl_release_nic_access(priv); } handled |= CSR_INT_BIT_FH_TX; } if (inta & ~handled) IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled); if (inta & ~CSR_INI_SET_MASK) { IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n", inta & ~CSR_INI_SET_MASK); IWL_WARN(priv, " with FH_INT = 0x%08x\n", inta_fh); } /* Re-enable all interrupts */ /* only Re-enable if disabled by irq */ if (test_bit(STATUS_INT_ENABLED, &priv->status)) iwl3945_enable_interrupts(priv); #ifdef CONFIG_IWL3945_DEBUG if (priv->debug_level & (IWL_DL_ISR)) { inta = iwl_read32(priv, CSR_INT); inta_mask = iwl_read32(priv, CSR_INT_MASK); inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS); IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, " "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags); } #endif spin_unlock_irqrestore(&priv->lock, flags); } static irqreturn_t iwl3945_isr(int irq, void *data) { struct iwl_priv *priv = data; u32 inta, inta_mask; u32 inta_fh; if (!priv) return IRQ_NONE; spin_lock(&priv->lock); /* Disable (but don't clear!) interrupts here to avoid * back-to-back ISRs and sporadic interrupts from our NIC. * If we have something to service, the tasklet will re-enable ints. * If we *don't* have something, we'll re-enable before leaving here. */ inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */ iwl_write32(priv, CSR_INT_MASK, 0x00000000); /* Discover which interrupts are active/pending */ inta = iwl_read32(priv, CSR_INT); inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS); /* Ignore interrupt if there's nothing in NIC to service. * This may be due to IRQ shared with another device, * or due to sporadic interrupts thrown from our NIC. */ if (!inta && !inta_fh) { IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n"); goto none; } if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) { /* Hardware disappeared */ IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta); goto unplugged; } IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta, inta_mask, inta_fh); inta &= ~CSR_INT_BIT_SCD; /* iwl3945_irq_tasklet() will service interrupts and re-enable them */ if (likely(inta || inta_fh)) tasklet_schedule(&priv->irq_tasklet); unplugged: spin_unlock(&priv->lock); return IRQ_HANDLED; none: /* re-enable interrupts here since we don't have anything to service. */ /* only Re-enable if disabled by irq */ if (test_bit(STATUS_INT_ENABLED, &priv->status)) iwl3945_enable_interrupts(priv); spin_unlock(&priv->lock); return IRQ_NONE; } /************************** EEPROM BANDS **************************** * * The iwl3945_eeprom_band definitions below provide the mapping from the * EEPROM contents to the specific channel number supported for each * band. * * For example, iwl3945_priv->eeprom39.band_3_channels[4] from the band_3 * definition below maps to physical channel 42 in the 5.2GHz spectrum. * The specific geography and calibration information for that channel * is contained in the eeprom map itself. * * During init, we copy the eeprom information and channel map * information into priv->channel_info_24/52 and priv->channel_map_24/52 * * channel_map_24/52 provides the index in the channel_info array for a * given channel. We have to have two separate maps as there is channel * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and * band_2 * * A value of 0xff stored in the channel_map indicates that the channel * is not supported by the hardware at all. * * A value of 0xfe in the channel_map indicates that the channel is not * valid for Tx with the current hardware. This means that * while the system can tune and receive on a given channel, it may not * be able to associate or transmit any frames on that * channel. There is no corresponding channel information for that * entry. * *********************************************************************/ /* 2.4 GHz */ static const u8 iwl3945_eeprom_band_1[14] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 }; /* 5.2 GHz bands */ static const u8 iwl3945_eeprom_band_2[] = { /* 4915-5080MHz */ 183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16 }; static const u8 iwl3945_eeprom_band_3[] = { /* 5170-5320MHz */ 34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64 }; static const u8 iwl3945_eeprom_band_4[] = { /* 5500-5700MHz */ 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140 }; static const u8 iwl3945_eeprom_band_5[] = { /* 5725-5825MHz */ 145, 149, 153, 157, 161, 165 }; static void iwl3945_init_band_reference(const struct iwl_priv *priv, int band, int *eeprom_ch_count, const struct iwl_eeprom_channel **eeprom_ch_info, const u8 **eeprom_ch_index) { switch (band) { case 1: /* 2.4GHz band */ *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_1); *eeprom_ch_info = priv->eeprom39.band_1_channels; *eeprom_ch_index = iwl3945_eeprom_band_1; break; case 2: /* 4.9GHz band */ *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_2); *eeprom_ch_info = priv->eeprom39.band_2_channels; *eeprom_ch_index = iwl3945_eeprom_band_2; break; case 3: /* 5.2GHz band */ *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_3); *eeprom_ch_info = priv->eeprom39.band_3_channels; *eeprom_ch_index = iwl3945_eeprom_band_3; break; case 4: /* 5.5GHz band */ *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_4); *eeprom_ch_info = priv->eeprom39.band_4_channels; *eeprom_ch_index = iwl3945_eeprom_band_4; break; case 5: /* 5.7GHz band */ *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_5); *eeprom_ch_info = priv->eeprom39.band_5_channels; *eeprom_ch_index = iwl3945_eeprom_band_5; break; default: BUG(); return; } } /** * iwl3945_get_channel_info - Find driver's private channel info * * Based on band and channel number. */ const struct iwl_channel_info * iwl3945_get_channel_info(const struct iwl_priv *priv, enum ieee80211_band band, u16 channel) { int i; switch (band) { case IEEE80211_BAND_5GHZ: for (i = 14; i < priv->channel_count; i++) { if (priv->channel_info[i].channel == channel) return &priv->channel_info[i]; } break; case IEEE80211_BAND_2GHZ: if (channel >= 1 && channel <= 14) return &priv->channel_info[channel - 1]; break; case IEEE80211_NUM_BANDS: WARN_ON(1); } return NULL; } #define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \ ? # x " " : "") /** * iwl3945_init_channel_map - Set up driver's info for all possible channels */ static int iwl3945_init_channel_map(struct iwl_priv *priv) { int eeprom_ch_count = 0; const u8 *eeprom_ch_index = NULL; const struct iwl_eeprom_channel *eeprom_ch_info = NULL; int band, ch; struct iwl_channel_info *ch_info; if (priv->channel_count) { IWL_DEBUG_INFO("Channel map already initialized.\n"); return 0; } if (priv->eeprom39.version < 0x2f) { IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n", priv->eeprom39.version); return -EINVAL; } IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n"); priv->channel_count = ARRAY_SIZE(iwl3945_eeprom_band_1) + ARRAY_SIZE(iwl3945_eeprom_band_2) + ARRAY_SIZE(iwl3945_eeprom_band_3) + ARRAY_SIZE(iwl3945_eeprom_band_4) + ARRAY_SIZE(iwl3945_eeprom_band_5); IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count); priv->channel_info = kzalloc(sizeof(struct iwl_channel_info) * priv->channel_count, GFP_KERNEL); if (!priv->channel_info) { IWL_ERR(priv, "Could not allocate channel_info\n"); priv->channel_count = 0; return -ENOMEM; } ch_info = priv->channel_info; /* Loop through the 5 EEPROM bands adding them in order to the * channel map we maintain (that contains additional information than * what just in the EEPROM) */ for (band = 1; band <= 5; band++) { iwl3945_init_band_reference(priv, band, &eeprom_ch_count, &eeprom_ch_info, &eeprom_ch_index); /* Loop through each band adding each of the channels */ for (ch = 0; ch < eeprom_ch_count; ch++) { ch_info->channel = eeprom_ch_index[ch]; ch_info->band = (band == 1) ? IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ; /* permanently store EEPROM's channel regulatory flags * and max power in channel info database. */ ch_info->eeprom = eeprom_ch_info[ch]; /* Copy the run-time flags so they are there even on * invalid channels */ ch_info->flags = eeprom_ch_info[ch].flags; if (!(is_channel_valid(ch_info))) { IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - " "No traffic\n", ch_info->channel, ch_info->flags, is_channel_a_band(ch_info) ? "5.2" : "2.4"); ch_info++; continue; } /* Initialize regulatory-based run-time data */ ch_info->max_power_avg = ch_info->curr_txpow = eeprom_ch_info[ch].max_power_avg; ch_info->scan_power = eeprom_ch_info[ch].max_power_avg; ch_info->min_power = 0; IWL_DEBUG_INFO("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(VALID), CHECK_AND_PRINT(IBSS), CHECK_AND_PRINT(ACTIVE), CHECK_AND_PRINT(RADAR), CHECK_AND_PRINT(WIDE), CHECK_AND_PRINT(DFS), eeprom_ch_info[ch].flags, eeprom_ch_info[ch].max_power_avg, ((eeprom_ch_info[ch]. flags & EEPROM_CHANNEL_IBSS) && !(eeprom_ch_info[ch]. flags & EEPROM_CHANNEL_RADAR)) ? "" : "not "); /* Set the tx_power_user_lmt to the highest power * supported by any channel */ if (eeprom_ch_info[ch].max_power_avg > priv->tx_power_user_lmt) priv->tx_power_user_lmt = eeprom_ch_info[ch].max_power_avg; ch_info++; } } /* Set up txpower settings in driver for all channels */ if (iwl3945_txpower_set_from_eeprom(priv)) return -EIO; return 0; } /* * iwl3945_free_channel_map - undo allocations in iwl3945_init_channel_map */ static void iwl3945_free_channel_map(struct iwl_priv *priv) { kfree(priv->channel_info); priv->channel_count = 0; } /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after * sending probe req. This should be set long enough to hear probe responses * from more than one AP. */ #define IWL_ACTIVE_DWELL_TIME_24 (30) /* all times in msec */ #define IWL_ACTIVE_DWELL_TIME_52 (20) #define IWL_ACTIVE_DWELL_FACTOR_24GHZ (3) #define IWL_ACTIVE_DWELL_FACTOR_52GHZ (2) /* For faster active scanning, scan will move to the next channel if fewer than * PLCP_QUIET_THRESH packets are heard on this channel within * ACTIVE_QUIET_TIME after sending probe request. This shortens the dwell * time if it's a quiet channel (nothing responded to our probe, and there's * no other traffic). * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */ #define IWL_PLCP_QUIET_THRESH __constant_cpu_to_le16(1) /* packets */ #define IWL_ACTIVE_QUIET_TIME __constant_cpu_to_le16(10) /* msec */ /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel. * Must be set longer than active dwell time. * For the most reliable scan, set > AP beacon interval (typically 100msec). */ #define IWL_PASSIVE_DWELL_TIME_24 (20) /* all times in msec */ #define IWL_PASSIVE_DWELL_TIME_52 (10) #define IWL_PASSIVE_DWELL_BASE (100) #define IWL_CHANNEL_TUNE_TIME 5 #define IWL_SCAN_PROBE_MASK(n) (BIT(n) | (BIT(n) - BIT(1))) static inline u16 iwl3945_get_active_dwell_time(struct iwl_priv *priv, enum ieee80211_band band, u8 n_probes) { if (band == IEEE80211_BAND_5GHZ) return IWL_ACTIVE_DWELL_TIME_52 + IWL_ACTIVE_DWELL_FACTOR_52GHZ * (n_probes + 1); else return IWL_ACTIVE_DWELL_TIME_24 + IWL_ACTIVE_DWELL_FACTOR_24GHZ * (n_probes + 1); } static u16 iwl3945_get_passive_dwell_time(struct iwl_priv *priv, enum ieee80211_band band) { u16 passive = (band == IEEE80211_BAND_2GHZ) ? IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 : IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52; if (iwl3945_is_associated(priv)) { /* If we're associated, we clamp the maximum passive * dwell time to be 98% of the beacon interval (minus * 2 * channel tune time) */ passive = priv->beacon_int; if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive) passive = IWL_PASSIVE_DWELL_BASE; passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2; } return passive; } static int iwl3945_get_channels_for_scan(struct iwl_priv *priv, enum ieee80211_band band, u8 is_active, u8 n_probes, struct iwl3945_scan_channel *scan_ch) { const struct ieee80211_channel *channels = NULL; const struct ieee80211_supported_band *sband; const struct iwl_channel_info *ch_info; u16 passive_dwell = 0; u16 active_dwell = 0; int added, i; sband = iwl_get_hw_mode(priv, band); if (!sband) return 0; channels = sband->channels; active_dwell = iwl3945_get_active_dwell_time(priv, band, n_probes); passive_dwell = iwl3945_get_passive_dwell_time(priv, band); if (passive_dwell <= active_dwell) passive_dwell = active_dwell + 1; for (i = 0, added = 0; i < sband->n_channels; i++) { if (channels[i].flags & IEEE80211_CHAN_DISABLED) continue; scan_ch->channel = channels[i].hw_value; ch_info = iwl3945_get_channel_info(priv, band, scan_ch->channel); if (!is_channel_valid(ch_info)) { IWL_DEBUG_SCAN("Channel %d is INVALID for this band.\n", scan_ch->channel); continue; } scan_ch->active_dwell = cpu_to_le16(active_dwell); scan_ch->passive_dwell = cpu_to_le16(passive_dwell); /* If passive , set up for auto-switch * and use long active_dwell time. */ if (!is_active || is_channel_passive(ch_info) || (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN)) { scan_ch->type = 0; /* passive */ if (IWL_UCODE_API(priv->ucode_ver) == 1) scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1); } else { scan_ch->type = 1; /* active */ } /* Set direct probe bits. These may be used both for active * scan channels (probes gets sent right away), * or for passive channels (probes get se sent only after * hearing clear Rx packet).*/ if (IWL_UCODE_API(priv->ucode_ver) >= 2) { if (n_probes) scan_ch->type |= IWL_SCAN_PROBE_MASK(n_probes); } else { /* uCode v1 does not allow setting direct probe bits on * passive channel. */ if ((scan_ch->type & 1) && n_probes) scan_ch->type |= IWL_SCAN_PROBE_MASK(n_probes); } /* Set txpower levels to defaults */ scan_ch->tpc.dsp_atten = 110; /* scan_pwr_info->tpc.dsp_atten; */ /*scan_pwr_info->tpc.tx_gain; */ if (band == IEEE80211_BAND_5GHZ) scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3; else { scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3)); /* NOTE: if we were doing 6Mb OFDM for scans we'd use * power level: * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3; */ } IWL_DEBUG_SCAN("Scanning %d [%s %d]\n", scan_ch->channel, (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE", (scan_ch->type & 1) ? active_dwell : passive_dwell); scan_ch++; added++; } IWL_DEBUG_SCAN("total channels to scan %d \n", added); return added; } static void iwl3945_init_hw_rates(struct iwl_priv *priv, struct ieee80211_rate *rates) { int i; for (i = 0; i < IWL_RATE_COUNT; i++) { rates[i].bitrate = iwl3945_rates[i].ieee * 5; rates[i].hw_value = i; /* Rate scaling will work on indexes */ rates[i].hw_value_short = i; rates[i].flags = 0; if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) { /* * If CCK != 1M then set short preamble rate flag. */ rates[i].flags |= (iwl3945_rates[i].plcp == 10) ? 0 : IEEE80211_RATE_SHORT_PREAMBLE; } } } /** * iwl3945_init_geos - Initialize mac80211's geo/channel info based from eeprom */ static int iwl3945_init_geos(struct iwl_priv *priv) { struct iwl_channel_info *ch; struct ieee80211_supported_band *sband; struct ieee80211_channel *channels; struct ieee80211_channel *geo_ch; struct ieee80211_rate *rates; int i = 0; if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates || priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) { IWL_DEBUG_INFO("Geography modes already initialized.\n"); set_bit(STATUS_GEO_CONFIGURED, &priv->status); return 0; } channels = kzalloc(sizeof(struct ieee80211_channel) * priv->channel_count, GFP_KERNEL); if (!channels) return -ENOMEM; rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)), GFP_KERNEL); if (!rates) { kfree(channels); return -ENOMEM; } /* 5.2GHz channels start after the 2.4GHz channels */ sband = &priv->bands[IEEE80211_BAND_5GHZ]; sband->channels = &channels[ARRAY_SIZE(iwl3945_eeprom_band_1)]; /* just OFDM */ sband->bitrates = &rates[IWL_FIRST_OFDM_RATE]; sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE; sband = &priv->bands[IEEE80211_BAND_2GHZ]; sband->channels = channels; /* OFDM & CCK */ sband->bitrates = rates; sband->n_bitrates = IWL_RATE_COUNT; priv->ieee_channels = channels; priv->ieee_rates = rates; iwl3945_init_hw_rates(priv, rates); for (i = 0; i < priv->channel_count; i++) { ch = &priv->channel_info[i]; /* FIXME: might be removed if scan is OK*/ if (!is_channel_valid(ch)) continue; if (is_channel_a_band(ch)) sband = &priv->bands[IEEE80211_BAND_5GHZ]; else sband = &priv->bands[IEEE80211_BAND_2GHZ]; geo_ch = &sband->channels[sband->n_channels++]; geo_ch->center_freq = ieee80211_channel_to_frequency(ch->channel); geo_ch->max_power = ch->max_power_avg; geo_ch->max_antenna_gain = 0xff; geo_ch->hw_value = ch->channel; if (is_channel_valid(ch)) { if (!(ch->flags & EEPROM_CHANNEL_IBSS)) geo_ch->flags |= IEEE80211_CHAN_NO_IBSS; if (!(ch->flags & EEPROM_CHANNEL_ACTIVE)) geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN; if (ch->flags & EEPROM_CHANNEL_RADAR) geo_ch->flags |= IEEE80211_CHAN_RADAR; if (ch->max_power_avg > priv->tx_power_channel_lmt) priv->tx_power_channel_lmt = ch->max_power_avg; } else { geo_ch->flags |= IEEE80211_CHAN_DISABLED; } /* Save flags for reg domain usage */ geo_ch->orig_flags = geo_ch->flags; IWL_DEBUG_INFO("Channel %d Freq=%d[%sGHz] %s flag=0%X\n", ch->channel, geo_ch->center_freq, is_channel_a_band(ch) ? "5.2" : "2.4", geo_ch->flags & IEEE80211_CHAN_DISABLED ? "restricted" : "valid", geo_ch->flags); } if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) && priv->cfg->sku & IWL_SKU_A) { IWL_INFO(priv, "Incorrectly detected BG card as ABG. " "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n", priv->pci_dev->device, priv->pci_dev->subsystem_device); priv->cfg->sku &= ~IWL_SKU_A; } IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n", priv->bands[IEEE80211_BAND_2GHZ].n_channels, priv->bands[IEEE80211_BAND_5GHZ].n_channels); if (priv->bands[IEEE80211_BAND_2GHZ].n_channels) priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &priv->bands[IEEE80211_BAND_2GHZ]; if (priv->bands[IEEE80211_BAND_5GHZ].n_channels) priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = &priv->bands[IEEE80211_BAND_5GHZ]; set_bit(STATUS_GEO_CONFIGURED, &priv->status); return 0; } /* * iwl3945_free_geos - undo allocations in iwl3945_init_geos */ static void iwl3945_free_geos(struct iwl_priv *priv) { kfree(priv->ieee_channels); kfree(priv->ieee_rates); clear_bit(STATUS_GEO_CONFIGURED, &priv->status); } /****************************************************************************** * * uCode download functions * ******************************************************************************/ static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv) { iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code); iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data); iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup); iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init); iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data); iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot); } /** * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host, * looking at all data. */ static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len) { u32 val; u32 save_len = len; int rc = 0; u32 errcnt; IWL_DEBUG_INFO("ucode inst image size is %u\n", len); rc = iwl_grab_nic_access(priv); if (rc) return rc; iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, IWL39_RTC_INST_LOWER_BOUND); errcnt = 0; for (; len > 0; len -= sizeof(u32), image++) { /* read data comes through single port, auto-incr addr */ /* NOTE: Use the debugless read so we don't flood kernel log * if IWL_DL_IO is set */ val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT); if (val != le32_to_cpu(*image)) { IWL_ERR(priv, "uCode INST section is invalid at " "offset 0x%x, is 0x%x, s/b 0x%x\n", save_len - len, val, le32_to_cpu(*image)); rc = -EIO; errcnt++; if (errcnt >= 20) break; } } iwl_release_nic_access(priv); if (!errcnt) IWL_DEBUG_INFO("ucode image in INSTRUCTION memory is good\n"); return rc; } /** * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host, * using sample data 100 bytes apart. If these sample points are good, * it's a pretty good bet that everything between them is good, too. */ static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len) { u32 val; int rc = 0; u32 errcnt = 0; u32 i; IWL_DEBUG_INFO("ucode inst image size is %u\n", len); rc = iwl_grab_nic_access(priv); if (rc) return rc; for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) { /* read data comes through single port, auto-incr addr */ /* NOTE: Use the debugless read so we don't flood kernel log * if IWL_DL_IO is set */ iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, i + IWL39_RTC_INST_LOWER_BOUND); val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT); if (val != le32_to_cpu(*image)) { #if 0 /* Enable this if you want to see details */ IWL_ERR(priv, "uCode INST section is invalid at " "offset 0x%x, is 0x%x, s/b 0x%x\n", i, val, *image); #endif rc = -EIO; errcnt++; if (errcnt >= 3) break; } } iwl_release_nic_access(priv); return rc; } /** * iwl3945_verify_ucode - determine which instruction image is in SRAM, * and verify its contents */ static int iwl3945_verify_ucode(struct iwl_priv *priv) { __le32 *image; u32 len; int rc = 0; /* Try bootstrap */ image = (__le32 *)priv->ucode_boot.v_addr; len = priv->ucode_boot.len; rc = iwl3945_verify_inst_sparse(priv, image, len); if (rc == 0) { IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n"); return 0; } /* Try initialize */ image = (__le32 *)priv->ucode_init.v_addr; len = priv->ucode_init.len; rc = iwl3945_verify_inst_sparse(priv, image, len); if (rc == 0) { IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n"); return 0; } /* Try runtime/protocol */ image = (__le32 *)priv->ucode_code.v_addr; len = priv->ucode_code.len; rc = iwl3945_verify_inst_sparse(priv, image, len); if (rc == 0) { IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n"); return 0; } IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n"); /* Since nothing seems to match, show first several data entries in * instruction SRAM, so maybe visual inspection will give a clue. * Selection of bootstrap image (vs. other images) is arbitrary. */ image = (__le32 *)priv->ucode_boot.v_addr; len = priv->ucode_boot.len; rc = iwl3945_verify_inst_full(priv, image, len); return rc; } static void iwl3945_nic_start(struct iwl_priv *priv) { /* Remove all resets to allow NIC to operate */ iwl_write32(priv, CSR_RESET, 0); } /** * iwl3945_read_ucode - Read uCode images from disk file. * * Copy into buffers for card to fetch via bus-mastering */ static int iwl3945_read_ucode(struct iwl_priv *priv) { struct iwl_ucode *ucode; int ret = -EINVAL, index; const struct firmware *ucode_raw; /* firmware file name contains uCode/driver compatibility version */ const char *name_pre = priv->cfg->fw_name_pre; const unsigned int api_max = priv->cfg->ucode_api_max; const unsigned int api_min = priv->cfg->ucode_api_min; char buf[25]; u8 *src; size_t len; u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size; /* Ask kernel firmware_class module to get the boot firmware off disk. * request_firmware() is synchronous, file is in memory on return. */ for (index = api_max; index >= api_min; index--) { sprintf(buf, "%s%u%s", name_pre, index, ".ucode"); ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev); if (ret < 0) { IWL_ERR(priv, "%s firmware file req failed: %d\n", buf, ret); if (ret == -ENOENT) continue; else goto error; } else { if (index < api_max) IWL_ERR(priv, "Loaded firmware %s, " "which is deprecated. " " Please use API v%u instead.\n", buf, api_max); IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n", buf, ucode_raw->size); break; } } if (ret < 0) goto error; /* Make sure that we got at least our header! */ if (ucode_raw->size < sizeof(*ucode)) { IWL_ERR(priv, "File size way too small!\n"); ret = -EINVAL; goto err_release; } /* Data from ucode file: header followed by uCode images */ ucode = (void *)ucode_raw->data; priv->ucode_ver = le32_to_cpu(ucode->ver); api_ver = IWL_UCODE_API(priv->ucode_ver); inst_size = le32_to_cpu(ucode->inst_size); data_size = le32_to_cpu(ucode->data_size); init_size = le32_to_cpu(ucode->init_size); init_data_size = le32_to_cpu(ucode->init_data_size); boot_size = le32_to_cpu(ucode->boot_size); /* api_ver should match the api version forming part of the * firmware filename ... but we don't check for that and only rely * on the API version read from firware header from here on forward */ if (api_ver < api_min || api_ver > api_max) { IWL_ERR(priv, "Driver unable to support your firmware API. " "Driver supports v%u, firmware is v%u.\n", api_max, api_ver); priv->ucode_ver = 0; ret = -EINVAL; goto err_release; } if (api_ver != api_max) IWL_ERR(priv, "Firmware has old API version. Expected %u, " "got %u. New firmware can be obtained " "from http://www.intellinuxwireless.org.\n", api_max, api_ver); IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n", IWL_UCODE_MAJOR(priv->ucode_ver), IWL_UCODE_MINOR(priv->ucode_ver), IWL_UCODE_API(priv->ucode_ver), IWL_UCODE_SERIAL(priv->ucode_ver)); IWL_DEBUG_INFO("f/w package hdr ucode version raw = 0x%x\n", priv->ucode_ver); IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n", inst_size); IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n", data_size); IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n", init_size); IWL_DEBUG_INFO("f/w package hdr init data size = %u\n", init_data_size); IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n", boot_size); /* Verify size of file vs. image size info in file's header */ if (ucode_raw->size < sizeof(*ucode) + inst_size + data_size + init_size + init_data_size + boot_size) { IWL_DEBUG_INFO("uCode file size %d too small\n", (int)ucode_raw->size); ret = -EINVAL; goto err_release; } /* Verify that uCode images will fit in card's SRAM */ if (inst_size > IWL39_MAX_INST_SIZE) { IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n", inst_size); ret = -EINVAL; goto err_release; } if (data_size > IWL39_MAX_DATA_SIZE) { IWL_DEBUG_INFO("uCode data len %d too large to fit in\n", data_size); ret = -EINVAL; goto err_release; } if (init_size > IWL39_MAX_INST_SIZE) { IWL_DEBUG_INFO("uCode init instr len %d too large to fit in\n", init_size); ret = -EINVAL; goto err_release; } if (init_data_size > IWL39_MAX_DATA_SIZE) { IWL_DEBUG_INFO("uCode init data len %d too large to fit in\n", init_data_size); ret = -EINVAL; goto err_release; } if (boot_size > IWL39_MAX_BSM_SIZE) { IWL_DEBUG_INFO("uCode boot instr len %d too large to fit in\n", boot_size); ret = -EINVAL; goto err_release; } /* Allocate ucode buffers for card's bus-master loading ... */ /* Runtime instructions and 2 copies of data: * 1) unmodified from disk * 2) backup cache for save/restore during power-downs */ priv->ucode_code.len = inst_size; iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code); priv->ucode_data.len = data_size; iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data); priv->ucode_data_backup.len = data_size; iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup); if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr || !priv->ucode_data_backup.v_addr) goto err_pci_alloc; /* Initialization instructions and data */ if (init_size && init_data_size) { priv->ucode_init.len = init_size; iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init); priv->ucode_init_data.len = init_data_size; iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data); if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr) goto err_pci_alloc; } /* Bootstrap (instructions only, no data) */ if (boot_size) { priv->ucode_boot.len = boot_size; iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot); if (!priv->ucode_boot.v_addr) goto err_pci_alloc; } /* Copy images into buffers for card's bus-master reads ... */ /* Runtime instructions (first block of data in file) */ src = &ucode->data[0]; len = priv->ucode_code.len; IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len); memcpy(priv->ucode_code.v_addr, src, len); IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n", priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr); /* Runtime data (2nd block) * NOTE: Copy into backup buffer will be done in iwl3945_up() */ src = &ucode->data[inst_size]; len = priv->ucode_data.len; IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len); memcpy(priv->ucode_data.v_addr, src, len); memcpy(priv->ucode_data_backup.v_addr, src, len); /* Initialization instructions (3rd block) */ if (init_size) { src = &ucode->data[inst_size + data_size]; len = priv->ucode_init.len; IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n", len); memcpy(priv->ucode_init.v_addr, src, len); } /* Initialization data (4th block) */ if (init_data_size) { src = &ucode->data[inst_size + data_size + init_size]; len = priv->ucode_init_data.len; IWL_DEBUG_INFO("Copying (but not loading) init data len %d\n", (int)len); memcpy(priv->ucode_init_data.v_addr, src, len); } /* Bootstrap instructions (5th block) */ src = &ucode->data[inst_size + data_size + init_size + init_data_size]; len = priv->ucode_boot.len; IWL_DEBUG_INFO("Copying (but not loading) boot instr len %d\n", (int)len); memcpy(priv->ucode_boot.v_addr, src, len); /* We have our copies now, allow OS release its copies */ release_firmware(ucode_raw); return 0; err_pci_alloc: IWL_ERR(priv, "failed to allocate pci memory\n"); ret = -ENOMEM; iwl3945_dealloc_ucode_pci(priv); err_release: release_firmware(ucode_raw); error: return ret; } /** * iwl3945_set_ucode_ptrs - Set uCode address location * * Tell initialization uCode where to find runtime uCode. * * BSM registers initially contain pointers to initialization uCode. * We need to replace them to load runtime uCode inst and data, * and to save runtime data when powering down. */ static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv) { dma_addr_t pinst; dma_addr_t pdata; int rc = 0; unsigned long flags; /* bits 31:0 for 3945 */ pinst = priv->ucode_code.p_addr; pdata = priv->ucode_data_backup.p_addr; spin_lock_irqsave(&priv->lock, flags); rc = iwl_grab_nic_access(priv); if (rc) { spin_unlock_irqrestore(&priv->lock, flags); return rc; } /* Tell bootstrap uCode where to find image to load */ iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst); iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata); iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, priv->ucode_data.len); /* Inst byte count must be last to set up, bit 31 signals uCode * that all new ptr/size info is in place */ iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, priv->ucode_code.len | BSM_DRAM_INST_LOAD); iwl_release_nic_access(priv); spin_unlock_irqrestore(&priv->lock, flags); IWL_DEBUG_INFO("Runtime uCode pointers are set.\n"); return rc; } /** * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received * * Called after REPLY_ALIVE notification received from "initialize" uCode. * * Tell "initialize" uCode to go ahead and load the runtime uCode. */ static void iwl3945_init_alive_start(struct iwl_priv *priv) { /* Check alive response for "valid" sign from uCode */ if (priv->card_alive_init.is_valid != UCODE_VALID_OK) { /* We had an error bringing up the hardware, so take it * all the way back down so we can try again */ IWL_DEBUG_INFO("Initialize Alive failed.\n"); goto restart; } /* Bootstrap uCode has loaded initialize uCode ... verify inst image. * This is a paranoid check, because we would not have gotten the * "initialize" alive if code weren't properly loaded. */ if (iwl3945_verify_ucode(priv)) { /* Runtime instruction load was bad; * take it all the way back down so we can try again */ IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n"); goto restart; } /* Send pointers to protocol/runtime uCode image ... init code will * load and launch runtime uCode, which will send us another "Alive" * notification. */ IWL_DEBUG_INFO("Initialization Alive received.\n"); if (iwl3945_set_ucode_ptrs(priv)) { /* Runtime instruction load won't happen; * take it all the way back down so we can try again */ IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n"); goto restart; } return; restart: queue_work(priv->workqueue, &priv->restart); } /* temporary */ static int iwl3945_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb); /** * iwl3945_alive_start - called after REPLY_ALIVE notification received * from protocol/runtime uCode (initialization uCode's * Alive gets handled by iwl3945_init_alive_start()). */ static void iwl3945_alive_start(struct iwl_priv *priv) { int rc = 0; int thermal_spin = 0; u32 rfkill; IWL_DEBUG_INFO("Runtime Alive received.\n"); if (priv->card_alive.is_valid != UCODE_VALID_OK) { /* We had an error bringing up the hardware, so take it * all the way back down so we can try again */ IWL_DEBUG_INFO("Alive failed.\n"); goto restart; } /* Initialize uCode has loaded Runtime uCode ... verify inst image. * This is a paranoid check, because we would not have gotten the * "runtime" alive if code weren't properly loaded. */ if (iwl3945_verify_ucode(priv)) { /* Runtime instruction load was bad; * take it all the way back down so we can try again */ IWL_DEBUG_INFO("Bad runtime uCode load.\n"); goto restart; } iwl3945_clear_stations_table(priv); rc = iwl_grab_nic_access(priv); if (rc) { IWL_WARN(priv, "Can not read RFKILL status from adapter\n"); return; } rfkill = iwl_read_prph(priv, APMG_RFKILL_REG); IWL_DEBUG_INFO("RFKILL status: 0x%x\n", rfkill); iwl_release_nic_access(priv); if (rfkill & 0x1) { clear_bit(STATUS_RF_KILL_HW, &priv->status); /* if RFKILL is not on, then wait for thermal * sensor in adapter to kick in */ while (iwl3945_hw_get_temperature(priv) == 0) { thermal_spin++; udelay(10); } if (thermal_spin) IWL_DEBUG_INFO("Thermal calibration took %dus\n", thermal_spin * 10); } else set_bit(STATUS_RF_KILL_HW, &priv->status); /* After the ALIVE response, we can send commands to 3945 uCode */ set_bit(STATUS_ALIVE, &priv->status); /* Clear out the uCode error bit if it is set */ clear_bit(STATUS_FW_ERROR, &priv->status); if (iwl_is_rfkill(priv)) return; ieee80211_wake_queues(priv->hw); priv->active_rate = priv->rates_mask; priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK; iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode)); if (iwl3945_is_associated(priv)) { struct iwl3945_rxon_cmd *active_rxon = (struct iwl3945_rxon_cmd *)(&priv->active39_rxon); memcpy(&priv->staging39_rxon, &priv->active39_rxon, sizeof(priv->staging39_rxon)); active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK; } else { /* Initialize our rx_config data */ iwl3945_connection_init_rx_config(priv, priv->iw_mode); memcpy(priv->staging39_rxon.node_addr, priv->mac_addr, ETH_ALEN); } /* Configure Bluetooth device coexistence support */ iwl3945_send_bt_config(priv); /* Configure the adapter for unassociated operation */ iwl3945_commit_rxon(priv); iwl3945_reg_txpower_periodic(priv); iwl3945_led_register(priv); IWL_DEBUG_INFO("ALIVE processing complete.\n"); set_bit(STATUS_READY, &priv->status); wake_up_interruptible(&priv->wait_command_queue); if (priv->error_recovering) iwl3945_error_recovery(priv); /* reassociate for ADHOC mode */ if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) { struct sk_buff *beacon = ieee80211_beacon_get(priv->hw, priv->vif); if (beacon) iwl3945_mac_beacon_update(priv->hw, beacon); } return; restart: queue_work(priv->workqueue, &priv->restart); } static void iwl3945_cancel_deferred_work(struct iwl_priv *priv); static void __iwl3945_down(struct iwl_priv *priv) { unsigned long flags; int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status); struct ieee80211_conf *conf = NULL; IWL_DEBUG_INFO(DRV_NAME " is going down\n"); conf = ieee80211_get_hw_conf(priv->hw); if (!exit_pending) set_bit(STATUS_EXIT_PENDING, &priv->status); iwl3945_led_unregister(priv); iwl3945_clear_stations_table(priv); /* Unblock any waiting calls */ wake_up_interruptible_all(&priv->wait_command_queue); /* Wipe out the EXIT_PENDING status bit if we are not actually * exiting the module */ if (!exit_pending) clear_bit(STATUS_EXIT_PENDING, &priv->status); /* stop and reset the on-board processor */ iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET); /* tell the device to stop sending interrupts */ spin_lock_irqsave(&priv->lock, flags); iwl3945_disable_interrupts(priv); spin_unlock_irqrestore(&priv->lock, flags); iwl_synchronize_irq(priv); if (priv->mac80211_registered) ieee80211_stop_queues(priv->hw); /* If we have not previously called iwl3945_init() then * clear all bits but the RF Kill and SUSPEND bits and return */ if (!iwl_is_init(priv)) { priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) << STATUS_RF_KILL_HW | test_bit(STATUS_RF_KILL_SW, &priv->status) << STATUS_RF_KILL_SW | test_bit(STATUS_GEO_CONFIGURED, &priv->status) << STATUS_GEO_CONFIGURED | test_bit(STATUS_IN_SUSPEND, &priv->status) << STATUS_IN_SUSPEND | test_bit(STATUS_EXIT_PENDING, &priv->status) << STATUS_EXIT_PENDING; goto exit; } /* ...otherwise clear out all the status bits but the RF Kill and * SUSPEND bits and continue taking the NIC down. */ priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) << STATUS_RF_KILL_HW | test_bit(STATUS_RF_KILL_SW, &priv->status) << STATUS_RF_KILL_SW | test_bit(STATUS_GEO_CONFIGURED, &priv->status) << STATUS_GEO_CONFIGURED | test_bit(STATUS_IN_SUSPEND, &priv->status) << STATUS_IN_SUSPEND | test_bit(STATUS_FW_ERROR, &priv->status) << STATUS_FW_ERROR | test_bit(STATUS_EXIT_PENDING, &priv->status) << STATUS_EXIT_PENDING; priv->cfg->ops->lib->apm_ops.reset(priv); spin_lock_irqsave(&priv->lock, flags); iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); spin_unlock_irqrestore(&priv->lock, flags); iwl3945_hw_txq_ctx_stop(priv); iwl3945_hw_rxq_stop(priv); spin_lock_irqsave(&priv->lock, flags); if (!iwl_grab_nic_access(priv)) { iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT); iwl_release_nic_access(priv); } spin_unlock_irqrestore(&priv->lock, flags); udelay(5); if (exit_pending || test_bit(STATUS_IN_SUSPEND, &priv->status)) priv->cfg->ops->lib->apm_ops.stop(priv); else priv->cfg->ops->lib->apm_ops.reset(priv); exit: memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp)); if (priv->ibss_beacon) dev_kfree_skb(priv->ibss_beacon); priv->ibss_beacon = NULL; /* clear out any free frames */ iwl3945_clear_free_frames(priv); } static void iwl3945_down(struct iwl_priv *priv) { mutex_lock(&priv->mutex); __iwl3945_down(priv); mutex_unlock(&priv->mutex); iwl3945_cancel_deferred_work(priv); } #define MAX_HW_RESTARTS 5 static int __iwl3945_up(struct iwl_priv *priv) { int rc, i; if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { IWL_WARN(priv, "Exit pending; will not bring the NIC up\n"); return -EIO; } if (test_bit(STATUS_RF_KILL_SW, &priv->status)) { IWL_WARN(priv, "Radio disabled by SW RF kill (module " "parameter)\n"); return -ENODEV; } if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) { IWL_ERR(priv, "ucode not available for device bring up\n"); return -EIO; } /* If platform's RF_KILL switch is NOT set to KILL */ if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW) clear_bit(STATUS_RF_KILL_HW, &priv->status); else { set_bit(STATUS_RF_KILL_HW, &priv->status); if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) { IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n"); return -ENODEV; } } iwl_write32(priv, CSR_INT, 0xFFFFFFFF); rc = iwl3945_hw_nic_init(priv); if (rc) { IWL_ERR(priv, "Unable to int nic\n"); return rc; } /* make sure rfkill handshake bits are cleared */ iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); /* clear (again), then enable host interrupts */ iwl_write32(priv, CSR_INT, 0xFFFFFFFF); iwl3945_enable_interrupts(priv); /* really make sure rfkill handshake bits are cleared */ iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL); /* Copy original ucode data image from disk into backup cache. * This will be used to initialize the on-board processor's * data SRAM for a clean start when the runtime program first loads. */ memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr, priv->ucode_data.len); /* We return success when we resume from suspend and rf_kill is on. */ if (test_bit(STATUS_RF_KILL_HW, &priv->status)) return 0; for (i = 0; i < MAX_HW_RESTARTS; i++) { iwl3945_clear_stations_table(priv); /* load bootstrap state machine, * load bootstrap program into processor's memory, * prepare to load the "initialize" uCode */ priv->cfg->ops->lib->load_ucode(priv); if (rc) { IWL_ERR(priv, "Unable to set up bootstrap uCode: %d\n", rc); continue; } /* start card; "initialize" will load runtime ucode */ iwl3945_nic_start(priv); IWL_DEBUG_INFO(DRV_NAME " is coming up\n"); return 0; } set_bit(STATUS_EXIT_PENDING, &priv->status); __iwl3945_down(priv); clear_bit(STATUS_EXIT_PENDING, &priv->status); /* tried to restart and config the device for as long as our * patience could withstand */ IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i); return -EIO; } /***************************************************************************** * * Workqueue callbacks * *****************************************************************************/ static void iwl3945_bg_init_alive_start(struct work_struct *data) { struct iwl_priv *priv = container_of(data, struct iwl_priv, init_alive_start.work); if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; mutex_lock(&priv->mutex); iwl3945_init_alive_start(priv); mutex_unlock(&priv->mutex); } static void iwl3945_bg_alive_start(struct work_struct *data) { struct iwl_priv *priv = container_of(data, struct iwl_priv, alive_start.work); if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; mutex_lock(&priv->mutex); iwl3945_alive_start(priv); mutex_unlock(&priv->mutex); } static void iwl3945_rfkill_poll(struct work_struct *data) { struct iwl_priv *priv = container_of(data, struct iwl_priv, rfkill_poll.work); unsigned long status = priv->status; if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW) clear_bit(STATUS_RF_KILL_HW, &priv->status); else set_bit(STATUS_RF_KILL_HW, &priv->status); if (test_bit(STATUS_RF_KILL_HW, &status) != test_bit(STATUS_RF_KILL_HW, &priv->status)) queue_work(priv->workqueue, &priv->rf_kill); queue_delayed_work(priv->workqueue, &priv->rfkill_poll, round_jiffies_relative(2 * HZ)); } #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ) static void iwl3945_bg_scan_check(struct work_struct *data) { struct iwl_priv *priv = container_of(data, struct iwl_priv, scan_check.work); if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; mutex_lock(&priv->mutex); if (test_bit(STATUS_SCANNING, &priv->status) || test_bit(STATUS_SCAN_ABORTING, &priv->status)) { IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "Scan completion watchdog resetting adapter (%dms)\n", jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG)); if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) iwl3945_send_scan_abort(priv); } mutex_unlock(&priv->mutex); } static void iwl3945_bg_request_scan(struct work_struct *data) { struct iwl_priv *priv = container_of(data, struct iwl_priv, request_scan); struct iwl_host_cmd cmd = { .id = REPLY_SCAN_CMD, .len = sizeof(struct iwl3945_scan_cmd), .meta.flags = CMD_SIZE_HUGE, }; int rc = 0; struct iwl3945_scan_cmd *scan; struct ieee80211_conf *conf = NULL; u8 n_probes = 2; enum ieee80211_band band; DECLARE_SSID_BUF(ssid); conf = ieee80211_get_hw_conf(priv->hw); mutex_lock(&priv->mutex); if (!iwl_is_ready(priv)) { IWL_WARN(priv, "request scan called when driver not ready.\n"); goto done; } /* Make sure the scan wasn't canceled before this queued work * was given the chance to run... */ if (!test_bit(STATUS_SCANNING, &priv->status)) goto done; /* This should never be called or scheduled if there is currently * a scan active in the hardware. */ if (test_bit(STATUS_SCAN_HW, &priv->status)) { IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. " "Ignoring second request.\n"); rc = -EIO; goto done; } if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n"); goto done; } if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) { IWL_DEBUG_HC("Scan request while abort pending. Queuing.\n"); goto done; } if (iwl_is_rfkill(priv)) { IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n"); goto done; } if (!test_bit(STATUS_READY, &priv->status)) { IWL_DEBUG_HC("Scan request while uninitialized. Queuing.\n"); goto done; } if (!priv->scan_bands) { IWL_DEBUG_HC("Aborting scan due to no requested bands\n"); goto done; } if (!priv->scan) { priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE, GFP_KERNEL); if (!priv->scan) { rc = -ENOMEM; goto done; } } scan = priv->scan; memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE); scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH; scan->quiet_time = IWL_ACTIVE_QUIET_TIME; if (iwl3945_is_associated(priv)) { u16 interval = 0; u32 extra; u32 suspend_time = 100; u32 scan_suspend_time = 100; unsigned long flags; IWL_DEBUG_INFO("Scanning while associated...\n"); spin_lock_irqsave(&priv->lock, flags); interval = priv->beacon_int; spin_unlock_irqrestore(&priv->lock, flags); scan->suspend_time = 0; scan->max_out_time = cpu_to_le32(200 * 1024); if (!interval) interval = suspend_time; /* * suspend time format: * 0-19: beacon interval in usec (time before exec.) * 20-23: 0 * 24-31: number of beacons (suspend between channels) */ extra = (suspend_time / interval) << 24; scan_suspend_time = 0xFF0FFFFF & (extra | ((suspend_time % interval) * 1024)); scan->suspend_time = cpu_to_le32(scan_suspend_time); IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n", scan_suspend_time, interval); } /* We should add the ability for user to lock to PASSIVE ONLY */ if (priv->one_direct_scan) { IWL_DEBUG_SCAN ("Kicking off one direct scan for '%s'\n", print_ssid(ssid, priv->direct_ssid, priv->direct_ssid_len)); scan->direct_scan[0].id = WLAN_EID_SSID; scan->direct_scan[0].len = priv->direct_ssid_len; memcpy(scan->direct_scan[0].ssid, priv->direct_ssid, priv->direct_ssid_len); n_probes++; } else IWL_DEBUG_SCAN("Kicking off one indirect scan.\n"); /* We don't build a direct scan probe request; the uCode will do * that based on the direct_mask added to each channel entry */ scan->tx_cmd.len = cpu_to_le16( iwl3945_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data, IWL_MAX_SCAN_SIZE - sizeof(*scan))); scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK; scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id; scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; /* flags + rate selection */ if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) { scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK; scan->tx_cmd.rate = IWL_RATE_1M_PLCP; scan->good_CRC_th = 0; band = IEEE80211_BAND_2GHZ; } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) { scan->tx_cmd.rate = IWL_RATE_6M_PLCP; scan->good_CRC_th = IWL_GOOD_CRC_TH; band = IEEE80211_BAND_5GHZ; } else { IWL_WARN(priv, "Invalid scan band count\n"); goto done; } /* select Rx antennas */ scan->flags |= iwl3945_get_antenna_flags(priv); if (priv->iw_mode == NL80211_IFTYPE_MONITOR) scan->filter_flags = RXON_FILTER_PROMISC_MSK; scan->channel_count = iwl3945_get_channels_for_scan(priv, band, 1, /* active */ n_probes, (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]); if (scan->channel_count == 0) { IWL_DEBUG_SCAN("channel count %d\n", scan->channel_count); goto done; } cmd.len += le16_to_cpu(scan->tx_cmd.len) + scan->channel_count * sizeof(struct iwl3945_scan_channel); cmd.data = scan; scan->len = cpu_to_le16(cmd.len); set_bit(STATUS_SCAN_HW, &priv->status); rc = iwl_send_cmd_sync(priv, &cmd); if (rc) goto done; queue_delayed_work(priv->workqueue, &priv->scan_check, IWL_SCAN_CHECK_WATCHDOG); mutex_unlock(&priv->mutex); return; done: /* can not perform scan make sure we clear scanning * bits from status so next scan request can be performed. * if we dont clear scanning status bit here all next scan * will fail */ clear_bit(STATUS_SCAN_HW, &priv->status); clear_bit(STATUS_SCANNING, &priv->status); /* inform mac80211 scan aborted */ queue_work(priv->workqueue, &priv->scan_completed); mutex_unlock(&priv->mutex); } static void iwl3945_bg_up(struct work_struct *data) { struct iwl_priv *priv = container_of(data, struct iwl_priv, up); if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; mutex_lock(&priv->mutex); __iwl3945_up(priv); mutex_unlock(&priv->mutex); iwl_rfkill_set_hw_state(priv); } static void iwl3945_bg_restart(struct work_struct *data) { struct iwl_priv *priv = container_of(data, struct iwl_priv, restart); if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; iwl3945_down(priv); queue_work(priv->workqueue, &priv->up); } static void iwl3945_bg_rx_replenish(struct work_struct *data) { struct iwl_priv *priv = container_of(data, struct iwl_priv, rx_replenish); if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; mutex_lock(&priv->mutex); iwl3945_rx_replenish(priv); mutex_unlock(&priv->mutex); } #define IWL_DELAY_NEXT_SCAN (HZ*2) static void iwl3945_post_associate(struct iwl_priv *priv) { int rc = 0; struct ieee80211_conf *conf = NULL; if (priv->iw_mode == NL80211_IFTYPE_AP) { IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__); return; } IWL_DEBUG_ASSOC("Associated as %d to: %pM\n", priv->assoc_id, priv->active39_rxon.bssid_addr); if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; if (!priv->vif || !priv->is_open) return; iwl_scan_cancel_timeout(priv, 200); conf = ieee80211_get_hw_conf(priv->hw); priv->staging39_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK; iwl3945_commit_rxon(priv); memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd)); iwl3945_setup_rxon_timing(priv); rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING, sizeof(priv->rxon_timing), &priv->rxon_timing); if (rc) IWL_WARN(priv, "REPLY_RXON_TIMING failed - " "Attempting to continue.\n"); priv->staging39_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK; priv->staging39_rxon.assoc_id = cpu_to_le16(priv->assoc_id); IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n", priv->assoc_id, priv->beacon_int); if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE) priv->staging39_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK; else priv->staging39_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK; if (priv->staging39_rxon.flags & RXON_FLG_BAND_24G_MSK) { if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME) priv->staging39_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK; else priv->staging39_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK; if (priv->iw_mode == NL80211_IFTYPE_ADHOC) priv->staging39_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK; } iwl3945_commit_rxon(priv); switch (priv->iw_mode) { case NL80211_IFTYPE_STATION: iwl3945_rate_scale_init(priv->hw, IWL_AP_ID); break; case NL80211_IFTYPE_ADHOC: priv->assoc_id = 1; iwl3945_add_station(priv, priv->bssid, 0, 0); iwl3945_sync_sta(priv, IWL_STA_ID, (priv->band == IEEE80211_BAND_5GHZ) ? IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP, CMD_ASYNC); iwl3945_rate_scale_init(priv->hw, IWL_STA_ID); iwl3945_send_beacon_cmd(priv); break; default: IWL_ERR(priv, "%s Should not be called in %d mode\n", __func__, priv->iw_mode); break; } iwl3945_activate_qos(priv, 0); /* we have just associated, don't start scan too early */ priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN; } static void iwl3945_bg_abort_scan(struct work_struct *work) { struct iwl_priv *priv = container_of(work, struct iwl_priv, abort_scan); if (!iwl_is_ready(priv)) return; mutex_lock(&priv->mutex); set_bit(STATUS_SCAN_ABORTING, &priv->status); iwl3945_send_scan_abort(priv); mutex_unlock(&priv->mutex); } static int iwl3945_mac_config(struct ieee80211_hw *hw, u32 changed); static void iwl3945_bg_scan_completed(struct work_struct *work) { struct iwl_priv *priv = container_of(work, struct iwl_priv, scan_completed); IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n"); if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; if (test_bit(STATUS_CONF_PENDING, &priv->status)) iwl3945_mac_config(priv->hw, 0); ieee80211_scan_completed(priv->hw); /* Since setting the TXPOWER may have been deferred while * performing the scan, fire one off */ mutex_lock(&priv->mutex); iwl3945_hw_reg_send_txpower(priv); mutex_unlock(&priv->mutex); } /***************************************************************************** * * mac80211 entry point functions * *****************************************************************************/ #define UCODE_READY_TIMEOUT (2 * HZ) static int iwl3945_mac_start(struct ieee80211_hw *hw) { struct iwl_priv *priv = hw->priv; int ret; IWL_DEBUG_MAC80211("enter\n"); /* we should be verifying the device is ready to be opened */ mutex_lock(&priv->mutex); memset(&priv->staging39_rxon, 0, sizeof(struct iwl3945_rxon_cmd)); /* fetch ucode file from disk, alloc and copy to bus-master buffers ... * ucode filename and max sizes are card-specific. */ if (!priv->ucode_code.len) { ret = iwl3945_read_ucode(priv); if (ret) { IWL_ERR(priv, "Could not read microcode: %d\n", ret); mutex_unlock(&priv->mutex); goto out_release_irq; } } ret = __iwl3945_up(priv); mutex_unlock(&priv->mutex); iwl_rfkill_set_hw_state(priv); if (ret) goto out_release_irq; IWL_DEBUG_INFO("Start UP work.\n"); if (test_bit(STATUS_IN_SUSPEND, &priv->status)) return 0; /* Wait for START_ALIVE from ucode. Otherwise callbacks from * mac80211 will not be run successfully. */ ret = wait_event_interruptible_timeout(priv->wait_command_queue, test_bit(STATUS_READY, &priv->status), UCODE_READY_TIMEOUT); if (!ret) { if (!test_bit(STATUS_READY, &priv->status)) { IWL_ERR(priv, "Wait for START_ALIVE timeout after %dms.\n", jiffies_to_msecs(UCODE_READY_TIMEOUT)); ret = -ETIMEDOUT; goto out_release_irq; } } /* ucode is running and will send rfkill notifications, * no need to poll the killswitch state anymore */ cancel_delayed_work(&priv->rfkill_poll); priv->is_open = 1; IWL_DEBUG_MAC80211("leave\n"); return 0; out_release_irq: priv->is_open = 0; IWL_DEBUG_MAC80211("leave - failed\n"); return ret; } static void iwl3945_mac_stop(struct ieee80211_hw *hw) { struct iwl_priv *priv = hw->priv; IWL_DEBUG_MAC80211("enter\n"); if (!priv->is_open) { IWL_DEBUG_MAC80211("leave - skip\n"); return; } priv->is_open = 0; if (iwl_is_ready_rf(priv)) { /* stop mac, cancel any scan request and clear * RXON_FILTER_ASSOC_MSK BIT */ mutex_lock(&priv->mutex); iwl_scan_cancel_timeout(priv, 100); mutex_unlock(&priv->mutex); } iwl3945_down(priv); flush_workqueue(priv->workqueue); /* start polling the killswitch state again */ queue_delayed_work(priv->workqueue, &priv->rfkill_poll, round_jiffies_relative(2 * HZ)); IWL_DEBUG_MAC80211("leave\n"); } static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb) { struct iwl_priv *priv = hw->priv; IWL_DEBUG_MAC80211("enter\n"); IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len, ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate); if (iwl3945_tx_skb(priv, skb)) dev_kfree_skb_any(skb); IWL_DEBUG_MAC80211("leave\n"); return NETDEV_TX_OK; } static int iwl3945_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_if_init_conf *conf) { struct iwl_priv *priv = hw->priv; unsigned long flags; IWL_DEBUG_MAC80211("enter: type %d\n", conf->type); if (priv->vif) { IWL_DEBUG_MAC80211("leave - vif != NULL\n"); return -EOPNOTSUPP; } spin_lock_irqsave(&priv->lock, flags); priv->vif = conf->vif; priv->iw_mode = conf->type; spin_unlock_irqrestore(&priv->lock, flags); mutex_lock(&priv->mutex); if (conf->mac_addr) { IWL_DEBUG_MAC80211("Set: %pM\n", conf->mac_addr); memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN); } if (iwl_is_ready(priv)) iwl3945_set_mode(priv, conf->type); mutex_unlock(&priv->mutex); IWL_DEBUG_MAC80211("leave\n"); return 0; } /** * iwl3945_mac_config - mac80211 config callback * * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to * be set inappropriately and the driver currently sets the hardware up to * use it whenever needed. */ static int iwl3945_mac_config(struct ieee80211_hw *hw, u32 changed) { struct iwl_priv *priv = hw->priv; const struct iwl_channel_info *ch_info; struct ieee80211_conf *conf = &hw->conf; unsigned long flags; int ret = 0; mutex_lock(&priv->mutex); IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value); if (!iwl_is_ready(priv)) { IWL_DEBUG_MAC80211("leave - not ready\n"); ret = -EIO; goto out; } if (unlikely(!iwl3945_mod_params.disable_hw_scan && test_bit(STATUS_SCANNING, &priv->status))) { IWL_DEBUG_MAC80211("leave - scanning\n"); set_bit(STATUS_CONF_PENDING, &priv->status); mutex_unlock(&priv->mutex); return 0; } spin_lock_irqsave(&priv->lock, flags); ch_info = iwl3945_get_channel_info(priv, conf->channel->band, conf->channel->hw_value); if (!is_channel_valid(ch_info)) { IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this band.\n", conf->channel->hw_value, conf->channel->band); IWL_DEBUG_MAC80211("leave - invalid channel\n"); spin_unlock_irqrestore(&priv->lock, flags); ret = -EINVAL; goto out; } iwl3945_set_rxon_channel(priv, conf->channel->band, conf->channel->hw_value); iwl3945_set_flags_for_phymode(priv, conf->channel->band); /* The list of supported rates and rate mask can be different * for each phymode; since the phymode may have changed, reset * the rate mask to what mac80211 lists */ iwl3945_set_rate(priv); spin_unlock_irqrestore(&priv->lock, flags); #ifdef IEEE80211_CONF_CHANNEL_SWITCH if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) { iwl3945_hw_channel_switch(priv, conf->channel); goto out; } #endif iwl3945_radio_kill_sw(priv, !conf->radio_enabled); if (!conf->radio_enabled) { IWL_DEBUG_MAC80211("leave - radio disabled\n"); goto out; } if (iwl_is_rfkill(priv)) { IWL_DEBUG_MAC80211("leave - RF kill\n"); ret = -EIO; goto out; } iwl3945_set_rate(priv); if (memcmp(&priv->active39_rxon, &priv->staging39_rxon, sizeof(priv->staging39_rxon))) iwl3945_commit_rxon(priv); else IWL_DEBUG_INFO("No re-sending same RXON configuration.\n"); IWL_DEBUG_MAC80211("leave\n"); out: clear_bit(STATUS_CONF_PENDING, &priv->status); mutex_unlock(&priv->mutex); return ret; } static void iwl3945_config_ap(struct iwl_priv *priv) { int rc = 0; if (test_bit(STATUS_EXIT_PENDING, &priv->status)) return; /* The following should be done only at AP bring up */ if (!(iwl3945_is_associated(priv))) { /* RXON - unassoc (to set timing command) */ priv->staging39_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK; iwl3945_commit_rxon(priv); /* RXON Timing */ memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd)); iwl3945_setup_rxon_timing(priv); rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING, sizeof(priv->rxon_timing), &priv->rxon_timing); if (rc) IWL_WARN(priv, "REPLY_RXON_TIMING failed - " "Attempting to continue.\n"); /* FIXME: what should be the assoc_id for AP? */ priv->staging39_rxon.assoc_id = cpu_to_le16(priv->assoc_id); if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE) priv->staging39_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK; else priv->staging39_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK; if (priv->staging39_rxon.flags & RXON_FLG_BAND_24G_MSK) { if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME) priv->staging39_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK; else priv->staging39_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK; if (priv->iw_mode == NL80211_IFTYPE_ADHOC) priv->staging39_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK; } /* restore RXON assoc */ priv->staging39_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK; iwl3945_commit_rxon(priv); iwl3945_add_station(priv, iwl_bcast_addr, 0, 0); } iwl3945_send_beacon_cmd(priv); /* FIXME - we need to add code here to detect a totally new * configuration, reset the AP, unassoc, rxon timing, assoc, * clear sta table, add BCAST sta... */ } static int iwl3945_mac_config_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_if_conf *conf) { struct iwl_priv *priv = hw->priv; int rc; if (conf == NULL) return -EIO; if (priv->vif != vif) { IWL_DEBUG_MAC80211("leave - priv->vif != vif\n"); return 0; } /* handle this temporarily here */ if (priv->iw_mode == NL80211_IFTYPE_ADHOC && conf->changed & IEEE80211_IFCC_BEACON) { struct sk_buff *beacon = ieee80211_beacon_get(hw, vif); if (!beacon) return -ENOMEM; mutex_lock(&priv->mutex); rc = iwl3945_mac_beacon_update(hw, beacon); mutex_unlock(&priv->mutex); if (rc) return rc; } if (!iwl_is_alive(priv)) return -EAGAIN; mutex_lock(&priv->mutex); if (conf->bssid) IWL_DEBUG_MAC80211("bssid: %pM\n", conf->bssid); /* * very dubious code was here; the probe filtering flag is never set: * if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) && !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) { */ if (priv->iw_mode == NL80211_IFTYPE_AP) { if (!conf->bssid) { conf->bssid = priv->mac_addr; memcpy(priv->bssid, priv->mac_addr, ETH_ALEN); IWL_DEBUG_MAC80211("bssid was set to: %pM\n", conf->bssid); } if (priv->ibss_beacon) dev_kfree_skb(priv->ibss_beacon); priv->ibss_beacon = ieee80211_beacon_get(hw, vif); } if (iwl_is_rfkill(priv)) goto done; if (conf->bssid && !is_zero_ether_addr(conf->bssid) && !is_multicast_ether_addr(conf->bssid)) { /* If there is currently a HW scan going on in the background * then we need to cancel it else the RXON below will fail. */ if (iwl_scan_cancel_timeout(priv, 100)) { IWL_WARN(priv, "Aborted scan still in progress " "after 100ms\n"); IWL_DEBUG_MAC80211("leaving - scan abort failed.\n"); mutex_unlock(&priv->mutex); return -EAGAIN; } memcpy(priv->staging39_rxon.bssid_addr, conf->bssid, ETH_ALEN); /* TODO: Audit driver for usage of these members and see * if mac80211 deprecates them (priv->bssid looks like it * shouldn't be there, but I haven't scanned the IBSS code * to verify) - jpk */ memcpy(priv->bssid, conf->bssid, ETH_ALEN); if (priv->iw_mode == NL80211_IFTYPE_AP) iwl3945_config_ap(priv); else { rc = iwl3945_commit_rxon(priv); if ((priv->iw_mode == NL80211_IFTYPE_STATION) && rc) iwl3945_add_station(priv, priv->active39_rxon.bssid_addr, 1, 0); } } else { iwl_scan_cancel_timeout(priv, 100); priv->staging39_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK; iwl3945_commit_rxon(priv); } done: IWL_DEBUG_MAC80211("leave\n"); mutex_unlock(&priv->mutex); return 0; } static void iwl3945_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags, unsigned int *total_flags, int mc_count, struct dev_addr_list *mc_list) { struct iwl_priv *priv = hw->priv; __le32 *filter_flags = &priv->staging39_rxon.filter_flags; IWL_DEBUG_MAC80211("Enter: changed: 0x%x, total: 0x%x\n", changed_flags, *total_flags); if (changed_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS)) { if (*total_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS)) *filter_flags |= RXON_FILTER_PROMISC_MSK; else *filter_flags &= ~RXON_FILTER_PROMISC_MSK; } if (changed_flags & FIF_ALLMULTI) { if (*total_flags & FIF_ALLMULTI) *filter_flags |= RXON_FILTER_ACCEPT_GRP_MSK; else *filter_flags &= ~RXON_FILTER_ACCEPT_GRP_MSK; } if (changed_flags & FIF_CONTROL) { if (*total_flags & FIF_CONTROL) *filter_flags |= RXON_FILTER_CTL2HOST_MSK; else *filter_flags &= ~RXON_FILTER_CTL2HOST_MSK; } if (changed_flags & FIF_BCN_PRBRESP_PROMISC) { if (*total_flags & FIF_BCN_PRBRESP_PROMISC) *filter_flags |= RXON_FILTER_BCON_AWARE_MSK; else *filter_flags &= ~RXON_FILTER_BCON_AWARE_MSK; } /* We avoid iwl_commit_rxon here to commit the new filter flags * since mac80211 will call ieee80211_hw_config immediately. * (mc_list is not supported at this time). Otherwise, we need to * queue a background iwl_commit_rxon work. */ *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS | FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL; } static void iwl3945_mac_remove_interface(struct ieee80211_hw *hw, struct ieee80211_if_init_conf *conf) { struct iwl_priv *priv = hw->priv; IWL_DEBUG_MAC80211("enter\n"); mutex_lock(&priv->mutex); if (iwl_is_ready_rf(priv)) { iwl_scan_cancel_timeout(priv, 100); priv->staging39_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK; iwl3945_commit_rxon(priv); } if (priv->vif == conf->vif) { priv->vif = NULL; memset(priv->bssid, 0, ETH_ALEN); } mutex_unlock(&priv->mutex); IWL_DEBUG_MAC80211("leave\n"); } #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6) static void iwl3945_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_bss_conf *bss_conf, u32 changes) { struct iwl_priv *priv = hw->priv; IWL_DEBUG_MAC80211("changes = 0x%X\n", changes); if (changes & BSS_CHANGED_ERP_PREAMBLE) { IWL_DEBUG_MAC80211("ERP_PREAMBLE %d\n", bss_conf->use_short_preamble); if (bss_conf->use_short_preamble) priv->staging39_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK; else priv->staging39_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK; } if (changes & BSS_CHANGED_ERP_CTS_PROT) { IWL_DEBUG_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot); if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ)) priv->staging39_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK; else priv->staging39_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK; } if (changes & BSS_CHANGED_ASSOC) { IWL_DEBUG_MAC80211("ASSOC %d\n", bss_conf->assoc); /* This should never happen as this function should * never be called from interrupt context. */ if (WARN_ON_ONCE(in_interrupt())) return; if (bss_conf->assoc) { priv->assoc_id = bss_conf->aid; priv->beacon_int = bss_conf->beacon_int; priv->timestamp = bss_conf->timestamp; priv->assoc_capability = bss_conf->assoc_capability; priv->power_data.dtim_period = bss_conf->dtim_period; priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN_AFTER_ASSOC; mutex_lock(&priv->mutex); iwl3945_post_associate(priv); mutex_unlock(&priv->mutex); } else { priv->assoc_id = 0; IWL_DEBUG_MAC80211("DISASSOC %d\n", bss_conf->assoc); } } else if (changes && iwl3945_is_associated(priv) && priv->assoc_id) { IWL_DEBUG_MAC80211("Associated Changes %d\n", changes); iwl3945_send_rxon_assoc(priv); } } static int iwl3945_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len) { int rc = 0; unsigned long flags; struct iwl_priv *priv = hw->priv; DECLARE_SSID_BUF(ssid_buf); IWL_DEBUG_MAC80211("enter\n"); mutex_lock(&priv->mutex); spin_lock_irqsave(&priv->lock, flags); if (!iwl_is_ready_rf(priv)) { rc = -EIO; IWL_DEBUG_MAC80211("leave - not ready or exit pending\n"); goto out_unlock; } /* we don't schedule scan within next_scan_jiffies period */ if (priv->next_scan_jiffies && time_after(priv->next_scan_jiffies, jiffies)) { rc = -EAGAIN; goto out_unlock; } /* if we just finished scan ask for delay for a broadcast scan */ if ((len == 0) && priv->last_scan_jiffies && time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN, jiffies)) { rc = -EAGAIN; goto out_unlock; } if (len) { IWL_DEBUG_SCAN("direct scan for %s [%d]\n ", print_ssid(ssid_buf, ssid, len), (int)len); priv->one_direct_scan = 1; priv->direct_ssid_len = (u8) min((u8) len, (u8) IW_ESSID_MAX_SIZE); memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len); } else priv->one_direct_scan = 0; rc = iwl3945_scan_initiate(priv); IWL_DEBUG_MAC80211("leave\n"); out_unlock: spin_unlock_irqrestore(&priv->lock, flags); mutex_unlock(&priv->mutex); return rc; } static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, struct ieee80211_vif *vif, struct ieee80211_sta *sta, struct ieee80211_key_conf *key) { struct iwl_priv *priv = hw->priv; const u8 *addr; int ret; u8 sta_id; IWL_DEBUG_MAC80211("enter\n"); if (iwl3945_mod_params.sw_crypto) { IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n"); return -EOPNOTSUPP; } addr = sta ? sta->addr : iwl_bcast_addr; sta_id = iwl3945_hw_find_station(priv, addr); if (sta_id == IWL_INVALID_STATION) { IWL_DEBUG_MAC80211("leave - %pM not in station map.\n", addr); return -EINVAL; } mutex_lock(&priv->mutex); iwl_scan_cancel_timeout(priv, 100); switch (cmd) { case SET_KEY: ret = iwl3945_update_sta_key_info(priv, key, sta_id); if (!ret) { iwl3945_set_rxon_hwcrypto(priv, 1); iwl3945_commit_rxon(priv); key->hw_key_idx = sta_id; IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n"); key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; } break; case DISABLE_KEY: ret = iwl3945_clear_sta_key_info(priv, sta_id); if (!ret) { iwl3945_set_rxon_hwcrypto(priv, 0); iwl3945_commit_rxon(priv); IWL_DEBUG_MAC80211("disable hwcrypto key\n"); } break; default: ret = -EINVAL; } IWL_DEBUG_MAC80211("leave\n"); mutex_unlock(&priv->mutex); return ret; } static int iwl3945_mac_conf_tx(struct ieee80211_hw *hw, u16 queue, const struct ieee80211_tx_queue_params *params) { struct iwl_priv *priv = hw->priv; unsigned long flags; int q; IWL_DEBUG_MAC80211("enter\n"); if (!iwl_is_ready_rf(priv)) { IWL_DEBUG_MAC80211("leave - RF not ready\n"); return -EIO; } if (queue >= AC_NUM) { IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue); return 0; } q = AC_NUM - 1 - queue; spin_lock_irqsave(&priv->lock, flags); priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min); priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max); priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs; priv->qos_data.def_qos_parm.ac[q].edca_txop = cpu_to_le16((params->txop * 32)); priv->qos_data.def_qos_parm.ac[q].reserved1 = 0; priv->qos_data.qos_active = 1; spin_unlock_irqrestore(&priv->lock, flags); mutex_lock(&priv->mutex); if (priv->iw_mode == NL80211_IFTYPE_AP) iwl3945_activate_qos(priv, 1); else if (priv->assoc_id && iwl3945_is_associated(priv)) iwl3945_activate_qos(priv, 0); mutex_unlock(&priv->mutex); IWL_DEBUG_MAC80211("leave\n"); return 0; } static int iwl3945_mac_get_tx_stats(struct ieee80211_hw *hw, struct ieee80211_tx_queue_stats *stats) { struct iwl_priv *priv = hw->priv; int i, avail; struct iwl_tx_queue *txq; struct iwl_queue *q; unsigned long flags; IWL_DEBUG_MAC80211("enter\n"); if (!iwl_is_ready_rf(priv)) { IWL_DEBUG_MAC80211("leave - RF not ready\n"); return -EIO; } spin_lock_irqsave(&priv->lock, flags); for (i = 0; i < AC_NUM; i++) { txq = &priv->txq[i]; q = &txq->q; avail = iwl_queue_space(q); stats[i].len = q->n_window - avail; stats[i].limit = q->n_window - q->high_mark; stats[i].count = q->n_window; } spin_unlock_irqrestore(&priv->lock, flags); IWL_DEBUG_MAC80211("leave\n"); return 0; } static void iwl3945_mac_reset_tsf(struct ieee80211_hw *hw) { struct iwl_priv *priv = hw->priv; unsigned long flags; mutex_lock(&priv->mutex); IWL_DEBUG_MAC80211("enter\n"); iwl_reset_qos(priv); spin_lock_irqsave(&priv->lock, flags); priv->assoc_id = 0; priv->assoc_capability = 0; /* new association get rid of ibss beacon skb */ if (priv->ibss_beacon) dev_kfree_skb(priv->ibss_beacon); priv->ibss_beacon = NULL; priv->beacon_int = priv->hw->conf.beacon_int; priv->timestamp = 0; if ((priv->iw_mode == NL80211_IFTYPE_STATION)) priv->beacon_int = 0; spin_unlock_irqrestore(&priv->lock, flags); if (!iwl_is_ready_rf(priv)) { IWL_DEBUG_MAC80211("leave - not ready\n"); mutex_unlock(&priv->mutex); return; } /* we are restarting association process * clear RXON_FILTER_ASSOC_MSK bit */ if (priv->iw_mode != NL80211_IFTYPE_AP) { iwl_scan_cancel_timeout(priv, 100); priv->staging39_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK; iwl3945_commit_rxon(priv); } /* Per mac80211.h: This is only used in IBSS mode... */ if (priv->iw_mode != NL80211_IFTYPE_ADHOC) { IWL_DEBUG_MAC80211("leave - not in IBSS\n"); mutex_unlock(&priv->mutex); return; } iwl3945_set_rate(priv); mutex_unlock(&priv->mutex); IWL_DEBUG_MAC80211("leave\n"); } static int iwl3945_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb) { struct iwl_priv *priv = hw->priv; unsigned long flags; IWL_DEBUG_MAC80211("enter\n"); if (!iwl_is_ready_rf(priv)) { IWL_DEBUG_MAC80211("leave - RF not ready\n"); return -EIO; } if (priv->iw_mode != NL80211_IFTYPE_ADHOC) { IWL_DEBUG_MAC80211("leave - not IBSS\n"); return -EIO; } spin_lock_irqsave(&priv->lock, flags); if (priv->ibss_beacon) dev_kfree_skb(priv->ibss_beacon); priv->ibss_beacon = skb; priv->assoc_id = 0; IWL_DEBUG_MAC80211("leave\n"); spin_unlock_irqrestore(&priv->lock, flags); iwl_reset_qos(priv); iwl3945_post_associate(priv); return 0; } /***************************************************************************** * * sysfs attributes * *****************************************************************************/ #ifdef CONFIG_IWL3945_DEBUG /* * The following adds a new attribute to the sysfs representation * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/) * used for controlling the debug level. * * See the level definitions in iwl for details. */ static ssize_t show_debug_level(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = d->driver_data; return sprintf(buf, "0x%08X\n", priv->debug_level); } static ssize_t store_debug_level(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { struct iwl_priv *priv = d->driver_data; unsigned long val; int ret; ret = strict_strtoul(buf, 0, &val); if (ret) IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf); else priv->debug_level = val; return strnlen(buf, count); } static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO, show_debug_level, store_debug_level); #endif /* CONFIG_IWL3945_DEBUG */ static ssize_t show_temperature(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = (struct iwl_priv *)d->driver_data; if (!iwl_is_alive(priv)) return -EAGAIN; return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv)); } static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL); static ssize_t show_tx_power(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = (struct iwl_priv *)d->driver_data; return sprintf(buf, "%d\n", priv->tx_power_user_lmt); } static ssize_t store_tx_power(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { struct iwl_priv *priv = (struct iwl_priv *)d->driver_data; char *p = (char *)buf; u32 val; val = simple_strtoul(p, &p, 10); if (p == buf) IWL_INFO(priv, ": %s is not in decimal form.\n", buf); else iwl3945_hw_reg_set_txpower(priv, val); return count; } static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power); static ssize_t show_flags(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = (struct iwl_priv *)d->driver_data; return sprintf(buf, "0x%04X\n", priv->active39_rxon.flags); } static ssize_t store_flags(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { struct iwl_priv *priv = (struct iwl_priv *)d->driver_data; u32 flags = simple_strtoul(buf, NULL, 0); mutex_lock(&priv->mutex); if (le32_to_cpu(priv->staging39_rxon.flags) != flags) { /* Cancel any currently running scans... */ if (iwl_scan_cancel_timeout(priv, 100)) IWL_WARN(priv, "Could not cancel scan.\n"); else { IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n", flags); priv->staging39_rxon.flags = cpu_to_le32(flags); iwl3945_commit_rxon(priv); } } mutex_unlock(&priv->mutex); return count; } static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags); static ssize_t show_filter_flags(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = (struct iwl_priv *)d->driver_data; return sprintf(buf, "0x%04X\n", le32_to_cpu(priv->active39_rxon.filter_flags)); } static ssize_t store_filter_flags(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { struct iwl_priv *priv = (struct iwl_priv *)d->driver_data; u32 filter_flags = simple_strtoul(buf, NULL, 0); mutex_lock(&priv->mutex); if (le32_to_cpu(priv->staging39_rxon.filter_flags) != filter_flags) { /* Cancel any currently running scans... */ if (iwl_scan_cancel_timeout(priv, 100)) IWL_WARN(priv, "Could not cancel scan.\n"); else { IWL_DEBUG_INFO("Committing rxon.filter_flags = " "0x%04X\n", filter_flags); priv->staging39_rxon.filter_flags = cpu_to_le32(filter_flags); iwl3945_commit_rxon(priv); } } mutex_unlock(&priv->mutex); return count; } static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags, store_filter_flags); #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT static ssize_t show_measurement(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = dev_get_drvdata(d); struct iwl_spectrum_notification measure_report; u32 size = sizeof(measure_report), len = 0, ofs = 0; u8 *data = (u8 *)&measure_report; unsigned long flags; spin_lock_irqsave(&priv->lock, flags); if (!(priv->measurement_status & MEASUREMENT_READY)) { spin_unlock_irqrestore(&priv->lock, flags); return 0; } memcpy(&measure_report, &priv->measure_report, size); priv->measurement_status = 0; spin_unlock_irqrestore(&priv->lock, flags); while (size && (PAGE_SIZE - len)) { hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len, PAGE_SIZE - len, 1); len = strlen(buf); if (PAGE_SIZE - len) buf[len++] = '\n'; ofs += 16; size -= min(size, 16U); } return len; } static ssize_t store_measurement(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { struct iwl_priv *priv = dev_get_drvdata(d); struct ieee80211_measurement_params params = { .channel = le16_to_cpu(priv->active39_rxon.channel), .start_time = cpu_to_le64(priv->last_tsf), .duration = cpu_to_le16(1), }; u8 type = IWL_MEASURE_BASIC; u8 buffer[32]; u8 channel; if (count) { char *p = buffer; strncpy(buffer, buf, min(sizeof(buffer), count)); channel = simple_strtoul(p, NULL, 0); if (channel) params.channel = channel; p = buffer; while (*p && *p != ' ') p++; if (*p) type = simple_strtoul(p + 1, NULL, 0); } IWL_DEBUG_INFO("Invoking measurement of type %d on " "channel %d (for '%s')\n", type, params.channel, buf); iwl3945_get_measurement(priv, ¶ms, type); return count; } static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR, show_measurement, store_measurement); #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */ static ssize_t store_retry_rate(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { struct iwl_priv *priv = dev_get_drvdata(d); priv->retry_rate = simple_strtoul(buf, NULL, 0); if (priv->retry_rate <= 0) priv->retry_rate = 1; return count; } static ssize_t show_retry_rate(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = dev_get_drvdata(d); return sprintf(buf, "%d", priv->retry_rate); } static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate, store_retry_rate); static ssize_t store_power_level(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { struct iwl_priv *priv = dev_get_drvdata(d); int rc; int mode; mode = simple_strtoul(buf, NULL, 0); mutex_lock(&priv->mutex); if (!iwl_is_ready(priv)) { rc = -EAGAIN; goto out; } if ((mode < 1) || (mode > IWL39_POWER_LIMIT) || (mode == IWL39_POWER_AC)) mode = IWL39_POWER_AC; else mode |= IWL_POWER_ENABLED; if (mode != priv->power_mode) { rc = iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(mode)); if (rc) { IWL_DEBUG_MAC80211("failed setting power mode.\n"); goto out; } priv->power_mode = mode; } rc = count; out: mutex_unlock(&priv->mutex); return rc; } #define MAX_WX_STRING 80 /* Values are in microsecond */ static const s32 timeout_duration[] = { 350000, 250000, 75000, 37000, 25000, }; static const s32 period_duration[] = { 400000, 700000, 1000000, 1000000, 1000000 }; static ssize_t show_power_level(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = dev_get_drvdata(d); int level = IWL_POWER_LEVEL(priv->power_mode); char *p = buf; p += sprintf(p, "%d ", level); switch (level) { case IWL_POWER_MODE_CAM: case IWL39_POWER_AC: p += sprintf(p, "(AC)"); break; case IWL39_POWER_BATTERY: p += sprintf(p, "(BATTERY)"); break; default: p += sprintf(p, "(Timeout %dms, Period %dms)", timeout_duration[level - 1] / 1000, period_duration[level - 1] / 1000); } if (!(priv->power_mode & IWL_POWER_ENABLED)) p += sprintf(p, " OFF\n"); else p += sprintf(p, " \n"); return p - buf + 1; } static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level, store_power_level); static ssize_t show_channels(struct device *d, struct device_attribute *attr, char *buf) { /* all this shit doesn't belong into sysfs anyway */ return 0; } static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL); static ssize_t show_statistics(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = dev_get_drvdata(d); u32 size = sizeof(struct iwl3945_notif_statistics); u32 len = 0, ofs = 0; u8 *data = (u8 *)&priv->statistics_39; int rc = 0; if (!iwl_is_alive(priv)) return -EAGAIN; mutex_lock(&priv->mutex); rc = iwl3945_send_statistics_request(priv); mutex_unlock(&priv->mutex); if (rc) { len = sprintf(buf, "Error sending statistics request: 0x%08X\n", rc); return len; } while (size && (PAGE_SIZE - len)) { hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len, PAGE_SIZE - len, 1); len = strlen(buf); if (PAGE_SIZE - len) buf[len++] = '\n'; ofs += 16; size -= min(size, 16U); } return len; } static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL); static ssize_t show_antenna(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = dev_get_drvdata(d); if (!iwl_is_alive(priv)) return -EAGAIN; return sprintf(buf, "%d\n", priv->antenna); } static ssize_t store_antenna(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { int ant; struct iwl_priv *priv = dev_get_drvdata(d); if (count == 0) return 0; if (sscanf(buf, "%1i", &ant) != 1) { IWL_DEBUG_INFO("not in hex or decimal form.\n"); return count; } if ((ant >= 0) && (ant <= 2)) { IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant); priv->antenna = (enum iwl3945_antenna)ant; } else IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant); return count; } static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna); static ssize_t show_status(struct device *d, struct device_attribute *attr, char *buf) { struct iwl_priv *priv = (struct iwl_priv *)d->driver_data; if (!iwl_is_alive(priv)) return -EAGAIN; return sprintf(buf, "0x%08x\n", (int)priv->status); } static DEVICE_ATTR(status, S_IRUGO, show_status, NULL); static ssize_t dump_error_log(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { char *p = (char *)buf; if (p[0] == '1') iwl3945_dump_nic_error_log((struct iwl_priv *)d->driver_data); return strnlen(buf, count); } static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log); static ssize_t dump_event_log(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { char *p = (char *)buf; if (p[0] == '1') iwl3945_dump_nic_event_log((struct iwl_priv *)d->driver_data); return strnlen(buf, count); } static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log); /***************************************************************************** * * driver setup and tear down * *****************************************************************************/ static void iwl3945_setup_deferred_work(struct iwl_priv *priv) { priv->workqueue = create_workqueue(DRV_NAME); init_waitqueue_head(&priv->wait_command_queue); INIT_WORK(&priv->up, iwl3945_bg_up); INIT_WORK(&priv->restart, iwl3945_bg_restart); INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish); INIT_WORK(&priv->scan_completed, iwl3945_bg_scan_completed); INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan); INIT_WORK(&priv->abort_scan, iwl3945_bg_abort_scan); INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill); INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update); INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start); INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start); INIT_DELAYED_WORK(&priv->scan_check, iwl3945_bg_scan_check); INIT_DELAYED_WORK(&priv->rfkill_poll, iwl3945_rfkill_poll); iwl3945_hw_setup_deferred_work(priv); tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long)) iwl3945_irq_tasklet, (unsigned long)priv); } static void iwl3945_cancel_deferred_work(struct iwl_priv *priv) { iwl3945_hw_cancel_deferred_work(priv); cancel_delayed_work_sync(&priv->init_alive_start); cancel_delayed_work(&priv->scan_check); cancel_delayed_work(&priv->alive_start); cancel_work_sync(&priv->beacon_update); } static struct attribute *iwl3945_sysfs_entries[] = { &dev_attr_antenna.attr, &dev_attr_channels.attr, &dev_attr_dump_errors.attr, &dev_attr_dump_events.attr, &dev_attr_flags.attr, &dev_attr_filter_flags.attr, #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT &dev_attr_measurement.attr, #endif &dev_attr_power_level.attr, &dev_attr_retry_rate.attr, &dev_attr_statistics.attr, &dev_attr_status.attr, &dev_attr_temperature.attr, &dev_attr_tx_power.attr, #ifdef CONFIG_IWL3945_DEBUG &dev_attr_debug_level.attr, #endif NULL }; static struct attribute_group iwl3945_attribute_group = { .name = NULL, /* put in device directory */ .attrs = iwl3945_sysfs_entries, }; static struct ieee80211_ops iwl3945_hw_ops = { .tx = iwl3945_mac_tx, .start = iwl3945_mac_start, .stop = iwl3945_mac_stop, .add_interface = iwl3945_mac_add_interface, .remove_interface = iwl3945_mac_remove_interface, .config = iwl3945_mac_config, .config_interface = iwl3945_mac_config_interface, .configure_filter = iwl3945_configure_filter, .set_key = iwl3945_mac_set_key, .get_tx_stats = iwl3945_mac_get_tx_stats, .conf_tx = iwl3945_mac_conf_tx, .reset_tsf = iwl3945_mac_reset_tsf, .bss_info_changed = iwl3945_bss_info_changed, .hw_scan = iwl3945_mac_hw_scan }; static int iwl3945_init_drv(struct iwl_priv *priv) { int ret; priv->retry_rate = 1; priv->ibss_beacon = NULL; spin_lock_init(&priv->lock); spin_lock_init(&priv->power_data.lock); spin_lock_init(&priv->sta_lock); spin_lock_init(&priv->hcmd_lock); INIT_LIST_HEAD(&priv->free_frames); mutex_init(&priv->mutex); /* Clear the driver's (not device's) station table */ iwl3945_clear_stations_table(priv); priv->data_retry_limit = -1; priv->ieee_channels = NULL; priv->ieee_rates = NULL; priv->band = IEEE80211_BAND_2GHZ; priv->iw_mode = NL80211_IFTYPE_STATION; iwl_reset_qos(priv); priv->qos_data.qos_active = 0; priv->qos_data.qos_cap.val = 0; priv->rates_mask = IWL_RATES_MASK; /* If power management is turned on, default to AC mode */ priv->power_mode = IWL39_POWER_AC; priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER; ret = iwl3945_init_channel_map(priv); if (ret) { IWL_ERR(priv, "initializing regulatory failed: %d\n", ret); goto err; } ret = iwl3945_init_geos(priv); if (ret) { IWL_ERR(priv, "initializing geos failed: %d\n", ret); goto err_free_channel_map; } return 0; err_free_channel_map: iwl3945_free_channel_map(priv); err: return ret; } static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { int err = 0; struct iwl_priv *priv; struct ieee80211_hw *hw; struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data); unsigned long flags; /*********************** * 1. Allocating HW data * ********************/ /* mac80211 allocates memory for this device instance, including * space for this driver's private structure */ hw = iwl_alloc_all(cfg, &iwl3945_hw_ops); if (hw == NULL) { printk(KERN_ERR DRV_NAME "Can not allocate network device\n"); err = -ENOMEM; goto out; } priv = hw->priv; SET_IEEE80211_DEV(hw, &pdev->dev); if ((iwl3945_mod_params.num_of_queues > IWL39_MAX_NUM_QUEUES) || (iwl3945_mod_params.num_of_queues < IWL_MIN_NUM_QUEUES)) { IWL_ERR(priv, "invalid queues_num, should be between %d and %d\n", IWL_MIN_NUM_QUEUES, IWL39_MAX_NUM_QUEUES); err = -EINVAL; goto out; } /* * Disabling hardware scan means that mac80211 will perform scans * "the hard way", rather than using device's scan. */ if (iwl3945_mod_params.disable_hw_scan) { IWL_DEBUG_INFO("Disabling hw_scan\n"); iwl3945_hw_ops.hw_scan = NULL; } IWL_DEBUG_INFO("*** LOAD DRIVER ***\n"); priv->cfg = cfg; priv->pci_dev = pdev; #ifdef CONFIG_IWL3945_DEBUG priv->debug_level = iwl3945_mod_params.debug; atomic_set(&priv->restrict_refcnt, 0); #endif hw->rate_control_algorithm = "iwl-3945-rs"; hw->sta_data_size = sizeof(struct iwl3945_sta_priv); /* Select antenna (may be helpful if only one antenna is connected) */ priv->antenna = (enum iwl3945_antenna)iwl3945_mod_params.antenna; /* Tell mac80211 our characteristics */ hw->flags = IEEE80211_HW_SIGNAL_DBM | IEEE80211_HW_NOISE_DBM; hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_ADHOC); hw->wiphy->custom_regulatory = true; /* 4 EDCA QOS priorities */ hw->queues = 4; /*************************** * 2. Initializing PCI bus * *************************/ if (pci_enable_device(pdev)) { err = -ENODEV; goto out_ieee80211_free_hw; } pci_set_master(pdev); err = pci_set_dma_mask(pdev, DMA_32BIT_MASK); if (!err) err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK); if (err) { IWL_WARN(priv, "No suitable DMA available.\n"); goto out_pci_disable_device; } pci_set_drvdata(pdev, priv); err = pci_request_regions(pdev, DRV_NAME); if (err) goto out_pci_disable_device; /*********************** * 3. Read REV Register * ********************/ priv->hw_base = pci_iomap(pdev, 0, 0); if (!priv->hw_base) { err = -ENODEV; goto out_pci_release_regions; } IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n", (unsigned long long) pci_resource_len(pdev, 0)); IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base); /* We disable the RETRY_TIMEOUT register (0x41) to keep * PCI Tx retries from interfering with C3 CPU state */ pci_write_config_byte(pdev, 0x41, 0x00); /* amp init */ err = priv->cfg->ops->lib->apm_ops.init(priv); if (err < 0) { IWL_DEBUG_INFO("Failed to init APMG\n"); goto out_iounmap; } /*********************** * 4. Read EEPROM * ********************/ /* Read the EEPROM */ err = iwl3945_eeprom_init(priv); if (err) { IWL_ERR(priv, "Unable to init EEPROM\n"); goto out_remove_sysfs; } /* MAC Address location in EEPROM same for 3945/4965 */ get_eeprom_mac(priv, priv->mac_addr); IWL_DEBUG_INFO("MAC address: %pM\n", priv->mac_addr); SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr); /*********************** * 5. Setup HW Constants * ********************/ /* Device-specific setup */ if (iwl3945_hw_set_hw_params(priv)) { IWL_ERR(priv, "failed to set hw settings\n"); goto out_iounmap; } /*********************** * 6. Setup priv * ********************/ err = iwl3945_init_drv(priv); if (err) { IWL_ERR(priv, "initializing driver failed\n"); goto out_free_geos; } IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n", priv->cfg->name); /*********************************** * 7. Initialize Module Parameters * **********************************/ /* Initialize module parameter values here */ /* Disable radio (SW RF KILL) via parameter when loading driver */ if (iwl3945_mod_params.disable) { set_bit(STATUS_RF_KILL_SW, &priv->status); IWL_DEBUG_INFO("Radio disabled.\n"); } /*********************** * 8. Setup Services * ********************/ spin_lock_irqsave(&priv->lock, flags); iwl3945_disable_interrupts(priv); spin_unlock_irqrestore(&priv->lock, flags); pci_enable_msi(priv->pci_dev); err = request_irq(priv->pci_dev->irq, iwl3945_isr, IRQF_SHARED, DRV_NAME, priv); if (err) { IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq); goto out_disable_msi; } err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group); if (err) { IWL_ERR(priv, "failed to create sysfs device attributes\n"); goto out_release_irq; } iwl3945_set_rxon_channel(priv, IEEE80211_BAND_2GHZ, 6); iwl3945_setup_deferred_work(priv); iwl3945_setup_rx_handlers(priv); /********************************* * 9. Setup and Register mac80211 * *******************************/ err = ieee80211_register_hw(priv->hw); if (err) { IWL_ERR(priv, "Failed to register network device: %d\n", err); goto out_remove_sysfs; } priv->hw->conf.beacon_int = 100; priv->mac80211_registered = 1; err = iwl_rfkill_init(priv); if (err) IWL_ERR(priv, "Unable to initialize RFKILL system. " "Ignoring error: %d\n", err); /* Start monitoring the killswitch */ queue_delayed_work(priv->workqueue, &priv->rfkill_poll, 2 * HZ); return 0; out_remove_sysfs: sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group); out_free_geos: iwl3945_free_geos(priv); out_release_irq: free_irq(priv->pci_dev->irq, priv); destroy_workqueue(priv->workqueue); priv->workqueue = NULL; iwl3945_unset_hw_params(priv); out_disable_msi: pci_disable_msi(priv->pci_dev); out_iounmap: pci_iounmap(pdev, priv->hw_base); out_pci_release_regions: pci_release_regions(pdev); out_pci_disable_device: pci_disable_device(pdev); pci_set_drvdata(pdev, NULL); out_ieee80211_free_hw: ieee80211_free_hw(priv->hw); out: return err; } static void __devexit iwl3945_pci_remove(struct pci_dev *pdev) { struct iwl_priv *priv = pci_get_drvdata(pdev); unsigned long flags; if (!priv) return; IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n"); set_bit(STATUS_EXIT_PENDING, &priv->status); if (priv->mac80211_registered) { ieee80211_unregister_hw(priv->hw); priv->mac80211_registered = 0; } else { iwl3945_down(priv); } /* make sure we flush any pending irq or * tasklet for the driver */ spin_lock_irqsave(&priv->lock, flags); iwl3945_disable_interrupts(priv); spin_unlock_irqrestore(&priv->lock, flags); iwl_synchronize_irq(priv); sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group); iwl_rfkill_unregister(priv); cancel_delayed_work(&priv->rfkill_poll); iwl3945_dealloc_ucode_pci(priv); if (priv->rxq.bd) iwl_rx_queue_free(priv, &priv->rxq); iwl3945_hw_txq_ctx_free(priv); iwl3945_unset_hw_params(priv); iwl3945_clear_stations_table(priv); /*netif_stop_queue(dev); */ flush_workqueue(priv->workqueue); /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes * priv->workqueue... so we can't take down the workqueue * until now... */ destroy_workqueue(priv->workqueue); priv->workqueue = NULL; free_irq(pdev->irq, priv); pci_disable_msi(pdev); pci_iounmap(pdev, priv->hw_base); pci_release_regions(pdev); pci_disable_device(pdev); pci_set_drvdata(pdev, NULL); iwl3945_free_channel_map(priv); iwl3945_free_geos(priv); kfree(priv->scan); if (priv->ibss_beacon) dev_kfree_skb(priv->ibss_beacon); ieee80211_free_hw(priv->hw); } #ifdef CONFIG_PM static int iwl3945_pci_suspend(struct pci_dev *pdev, pm_message_t state) { struct iwl_priv *priv = pci_get_drvdata(pdev); if (priv->is_open) { set_bit(STATUS_IN_SUSPEND, &priv->status); iwl3945_mac_stop(priv->hw); priv->is_open = 1; } pci_save_state(pdev); pci_disable_device(pdev); pci_set_power_state(pdev, PCI_D3hot); return 0; } static int iwl3945_pci_resume(struct pci_dev *pdev) { struct iwl_priv *priv = pci_get_drvdata(pdev); pci_set_power_state(pdev, PCI_D0); pci_enable_device(pdev); pci_restore_state(pdev); if (priv->is_open) iwl3945_mac_start(priv->hw); clear_bit(STATUS_IN_SUSPEND, &priv->status); return 0; } #endif /* CONFIG_PM */ /***************************************************************************** * * driver and module entry point * *****************************************************************************/ static struct pci_driver iwl3945_driver = { .name = DRV_NAME, .id_table = iwl3945_hw_card_ids, .probe = iwl3945_pci_probe, .remove = __devexit_p(iwl3945_pci_remove), #ifdef CONFIG_PM .suspend = iwl3945_pci_suspend, .resume = iwl3945_pci_resume, #endif }; static int __init iwl3945_init(void) { int ret; printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n"); printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n"); ret = iwl3945_rate_control_register(); if (ret) { printk(KERN_ERR DRV_NAME "Unable to register rate control algorithm: %d\n", ret); return ret; } ret = pci_register_driver(&iwl3945_driver); if (ret) { printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n"); goto error_register; } return ret; error_register: iwl3945_rate_control_unregister(); return ret; } static void __exit iwl3945_exit(void) { pci_unregister_driver(&iwl3945_driver); iwl3945_rate_control_unregister(); } MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX)); module_param_named(antenna, iwl3945_mod_params.antenna, int, 0444); MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])"); module_param_named(disable, iwl3945_mod_params.disable, int, 0444); MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])"); module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, 0444); MODULE_PARM_DESC(swcrypto, "using software crypto (default 1 [software])\n"); module_param_named(debug, iwl3945_mod_params.debug, uint, 0444); MODULE_PARM_DESC(debug, "debug output mask"); module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan, int, 0444); MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)"); module_param_named(queues_num, iwl3945_mod_params.num_of_queues, int, 0444); MODULE_PARM_DESC(queues_num, "number of hw queues."); module_exit(iwl3945_exit); module_init(iwl3945_init);