/** * This file contains the major functions in WLAN * driver. It includes init, exit, open, close and main * thread etc.. */ #include #include #include #include #include #include #include #include #include #include #include "host.h" #include "decl.h" #include "dev.h" #include "wext.h" #include "debugfs.h" #include "scan.h" #include "assoc.h" #include "cmd.h" #define DRIVER_RELEASE_VERSION "323.p0" const char lbs_driver_version[] = "COMM-USB8388-" DRIVER_RELEASE_VERSION #ifdef DEBUG "-dbg" #endif ""; /* Module parameters */ unsigned int lbs_debug; EXPORT_SYMBOL_GPL(lbs_debug); module_param_named(libertas_debug, lbs_debug, int, 0644); /* This global structure is used to send the confirm_sleep command as * fast as possible down to the firmware. */ struct cmd_confirm_sleep confirm_sleep; #define LBS_TX_PWR_DEFAULT 20 /*100mW */ #define LBS_TX_PWR_US_DEFAULT 20 /*100mW */ #define LBS_TX_PWR_JP_DEFAULT 16 /*50mW */ #define LBS_TX_PWR_FR_DEFAULT 20 /*100mW */ #define LBS_TX_PWR_EMEA_DEFAULT 20 /*100mW */ /* Format { channel, frequency (MHz), maxtxpower } */ /* band: 'B/G', region: USA FCC/Canada IC */ static struct chan_freq_power channel_freq_power_US_BG[] = { {1, 2412, LBS_TX_PWR_US_DEFAULT}, {2, 2417, LBS_TX_PWR_US_DEFAULT}, {3, 2422, LBS_TX_PWR_US_DEFAULT}, {4, 2427, LBS_TX_PWR_US_DEFAULT}, {5, 2432, LBS_TX_PWR_US_DEFAULT}, {6, 2437, LBS_TX_PWR_US_DEFAULT}, {7, 2442, LBS_TX_PWR_US_DEFAULT}, {8, 2447, LBS_TX_PWR_US_DEFAULT}, {9, 2452, LBS_TX_PWR_US_DEFAULT}, {10, 2457, LBS_TX_PWR_US_DEFAULT}, {11, 2462, LBS_TX_PWR_US_DEFAULT} }; /* band: 'B/G', region: Europe ETSI */ static struct chan_freq_power channel_freq_power_EU_BG[] = { {1, 2412, LBS_TX_PWR_EMEA_DEFAULT}, {2, 2417, LBS_TX_PWR_EMEA_DEFAULT}, {3, 2422, LBS_TX_PWR_EMEA_DEFAULT}, {4, 2427, LBS_TX_PWR_EMEA_DEFAULT}, {5, 2432, LBS_TX_PWR_EMEA_DEFAULT}, {6, 2437, LBS_TX_PWR_EMEA_DEFAULT}, {7, 2442, LBS_TX_PWR_EMEA_DEFAULT}, {8, 2447, LBS_TX_PWR_EMEA_DEFAULT}, {9, 2452, LBS_TX_PWR_EMEA_DEFAULT}, {10, 2457, LBS_TX_PWR_EMEA_DEFAULT}, {11, 2462, LBS_TX_PWR_EMEA_DEFAULT}, {12, 2467, LBS_TX_PWR_EMEA_DEFAULT}, {13, 2472, LBS_TX_PWR_EMEA_DEFAULT} }; /* band: 'B/G', region: Spain */ static struct chan_freq_power channel_freq_power_SPN_BG[] = { {10, 2457, LBS_TX_PWR_DEFAULT}, {11, 2462, LBS_TX_PWR_DEFAULT} }; /* band: 'B/G', region: France */ static struct chan_freq_power channel_freq_power_FR_BG[] = { {10, 2457, LBS_TX_PWR_FR_DEFAULT}, {11, 2462, LBS_TX_PWR_FR_DEFAULT}, {12, 2467, LBS_TX_PWR_FR_DEFAULT}, {13, 2472, LBS_TX_PWR_FR_DEFAULT} }; /* band: 'B/G', region: Japan */ static struct chan_freq_power channel_freq_power_JPN_BG[] = { {1, 2412, LBS_TX_PWR_JP_DEFAULT}, {2, 2417, LBS_TX_PWR_JP_DEFAULT}, {3, 2422, LBS_TX_PWR_JP_DEFAULT}, {4, 2427, LBS_TX_PWR_JP_DEFAULT}, {5, 2432, LBS_TX_PWR_JP_DEFAULT}, {6, 2437, LBS_TX_PWR_JP_DEFAULT}, {7, 2442, LBS_TX_PWR_JP_DEFAULT}, {8, 2447, LBS_TX_PWR_JP_DEFAULT}, {9, 2452, LBS_TX_PWR_JP_DEFAULT}, {10, 2457, LBS_TX_PWR_JP_DEFAULT}, {11, 2462, LBS_TX_PWR_JP_DEFAULT}, {12, 2467, LBS_TX_PWR_JP_DEFAULT}, {13, 2472, LBS_TX_PWR_JP_DEFAULT}, {14, 2484, LBS_TX_PWR_JP_DEFAULT} }; /** * the structure for channel, frequency and power */ struct region_cfp_table { u8 region; struct chan_freq_power *cfp_BG; int cfp_no_BG; }; /** * the structure for the mapping between region and CFP */ static struct region_cfp_table region_cfp_table[] = { {0x10, /*US FCC */ channel_freq_power_US_BG, ARRAY_SIZE(channel_freq_power_US_BG), } , {0x20, /*CANADA IC */ channel_freq_power_US_BG, ARRAY_SIZE(channel_freq_power_US_BG), } , {0x30, /*EU*/ channel_freq_power_EU_BG, ARRAY_SIZE(channel_freq_power_EU_BG), } , {0x31, /*SPAIN*/ channel_freq_power_SPN_BG, ARRAY_SIZE(channel_freq_power_SPN_BG), } , {0x32, /*FRANCE*/ channel_freq_power_FR_BG, ARRAY_SIZE(channel_freq_power_FR_BG), } , {0x40, /*JAPAN*/ channel_freq_power_JPN_BG, ARRAY_SIZE(channel_freq_power_JPN_BG), } , /*Add new region here */ }; /** * the table to keep region code */ u16 lbs_region_code_to_index[MRVDRV_MAX_REGION_CODE] = { 0x10, 0x20, 0x30, 0x31, 0x32, 0x40 }; /** * 802.11b/g supported bitrates (in 500Kb/s units) */ u8 lbs_bg_rates[MAX_RATES] = { 0x02, 0x04, 0x0b, 0x16, 0x0c, 0x12, 0x18, 0x24, 0x30, 0x48, 0x60, 0x6c, 0x00, 0x00 }; /** * FW rate table. FW refers to rates by their index in this table, not by the * rate value itself. Values of 0x00 are * reserved positions. */ static u8 fw_data_rates[MAX_RATES] = { 0x02, 0x04, 0x0B, 0x16, 0x00, 0x0C, 0x12, 0x18, 0x24, 0x30, 0x48, 0x60, 0x6C, 0x00 }; /** * @brief use index to get the data rate * * @param idx The index of data rate * @return data rate or 0 */ u32 lbs_fw_index_to_data_rate(u8 idx) { if (idx >= sizeof(fw_data_rates)) idx = 0; return fw_data_rates[idx]; } /** * @brief use rate to get the index * * @param rate data rate * @return index or 0 */ u8 lbs_data_rate_to_fw_index(u32 rate) { u8 i; if (!rate) return 0; for (i = 0; i < sizeof(fw_data_rates); i++) { if (rate == fw_data_rates[i]) return i; } return 0; } /** * Attributes exported through sysfs */ /** * @brief Get function for sysfs attribute anycast_mask */ static ssize_t lbs_anycast_get(struct device *dev, struct device_attribute *attr, char * buf) { struct lbs_private *priv = to_net_dev(dev)->priv; struct cmd_ds_mesh_access mesh_access; int ret; memset(&mesh_access, 0, sizeof(mesh_access)); ret = lbs_mesh_access(priv, CMD_ACT_MESH_GET_ANYCAST, &mesh_access); if (ret) return ret; return snprintf(buf, 12, "0x%X\n", le32_to_cpu(mesh_access.data[0])); } /** * @brief Set function for sysfs attribute anycast_mask */ static ssize_t lbs_anycast_set(struct device *dev, struct device_attribute *attr, const char * buf, size_t count) { struct lbs_private *priv = to_net_dev(dev)->priv; struct cmd_ds_mesh_access mesh_access; uint32_t datum; int ret; memset(&mesh_access, 0, sizeof(mesh_access)); sscanf(buf, "%x", &datum); mesh_access.data[0] = cpu_to_le32(datum); ret = lbs_mesh_access(priv, CMD_ACT_MESH_SET_ANYCAST, &mesh_access); if (ret) return ret; return strlen(buf); } static int lbs_add_rtap(struct lbs_private *priv); static void lbs_remove_rtap(struct lbs_private *priv); static int lbs_add_mesh(struct lbs_private *priv); static void lbs_remove_mesh(struct lbs_private *priv); /** * Get function for sysfs attribute rtap */ static ssize_t lbs_rtap_get(struct device *dev, struct device_attribute *attr, char * buf) { struct lbs_private *priv = to_net_dev(dev)->priv; return snprintf(buf, 5, "0x%X\n", priv->monitormode); } /** * Set function for sysfs attribute rtap */ static ssize_t lbs_rtap_set(struct device *dev, struct device_attribute *attr, const char * buf, size_t count) { int monitor_mode; struct lbs_private *priv = to_net_dev(dev)->priv; sscanf(buf, "%x", &monitor_mode); if (monitor_mode) { if (priv->monitormode == monitor_mode) return strlen(buf); if (!priv->monitormode) { if (priv->infra_open || priv->mesh_open) return -EBUSY; if (priv->mode == IW_MODE_INFRA) lbs_send_deauthentication(priv); else if (priv->mode == IW_MODE_ADHOC) lbs_stop_adhoc_network(priv); lbs_add_rtap(priv); } priv->monitormode = monitor_mode; } else { if (!priv->monitormode) return strlen(buf); priv->monitormode = 0; lbs_remove_rtap(priv); if (priv->currenttxskb) { dev_kfree_skb_any(priv->currenttxskb); priv->currenttxskb = NULL; } /* Wake queues, command thread, etc. */ lbs_host_to_card_done(priv); } lbs_prepare_and_send_command(priv, CMD_802_11_MONITOR_MODE, CMD_ACT_SET, CMD_OPTION_WAITFORRSP, 0, &priv->monitormode); return strlen(buf); } /** * lbs_rtap attribute to be exported per ethX interface * through sysfs (/sys/class/net/ethX/lbs_rtap) */ static DEVICE_ATTR(lbs_rtap, 0644, lbs_rtap_get, lbs_rtap_set ); /** * Get function for sysfs attribute mesh */ static ssize_t lbs_mesh_get(struct device *dev, struct device_attribute *attr, char * buf) { struct lbs_private *priv = to_net_dev(dev)->priv; return snprintf(buf, 5, "0x%X\n", !!priv->mesh_dev); } /** * Set function for sysfs attribute mesh */ static ssize_t lbs_mesh_set(struct device *dev, struct device_attribute *attr, const char * buf, size_t count) { struct lbs_private *priv = to_net_dev(dev)->priv; int enable; int ret, action = CMD_ACT_MESH_CONFIG_STOP; sscanf(buf, "%x", &enable); enable = !!enable; if (enable == !!priv->mesh_dev) return count; if (enable) action = CMD_ACT_MESH_CONFIG_START; ret = lbs_mesh_config(priv, action, priv->curbssparams.channel); if (ret) return ret; if (enable) lbs_add_mesh(priv); else lbs_remove_mesh(priv); return count; } /** * lbs_mesh attribute to be exported per ethX interface * through sysfs (/sys/class/net/ethX/lbs_mesh) */ static DEVICE_ATTR(lbs_mesh, 0644, lbs_mesh_get, lbs_mesh_set); /** * anycast_mask attribute to be exported per mshX interface * through sysfs (/sys/class/net/mshX/anycast_mask) */ static DEVICE_ATTR(anycast_mask, 0644, lbs_anycast_get, lbs_anycast_set); static struct attribute *lbs_mesh_sysfs_entries[] = { &dev_attr_anycast_mask.attr, NULL, }; static struct attribute_group lbs_mesh_attr_group = { .attrs = lbs_mesh_sysfs_entries, }; /** * @brief This function opens the ethX or mshX interface * * @param dev A pointer to net_device structure * @return 0 or -EBUSY if monitor mode active */ static int lbs_dev_open(struct net_device *dev) { struct lbs_private *priv = (struct lbs_private *) dev->priv ; int ret = 0; lbs_deb_enter(LBS_DEB_NET); spin_lock_irq(&priv->driver_lock); if (priv->monitormode) { ret = -EBUSY; goto out; } if (dev == priv->mesh_dev) { priv->mesh_open = 1; priv->mesh_connect_status = LBS_CONNECTED; netif_carrier_on(dev); } else { priv->infra_open = 1; if (priv->connect_status == LBS_CONNECTED) netif_carrier_on(dev); else netif_carrier_off(dev); } if (!priv->tx_pending_len) netif_wake_queue(dev); out: spin_unlock_irq(&priv->driver_lock); lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret); return ret; } /** * @brief This function closes the mshX interface * * @param dev A pointer to net_device structure * @return 0 */ static int lbs_mesh_stop(struct net_device *dev) { struct lbs_private *priv = (struct lbs_private *) (dev->priv); lbs_deb_enter(LBS_DEB_MESH); spin_lock_irq(&priv->driver_lock); priv->mesh_open = 0; priv->mesh_connect_status = LBS_DISCONNECTED; netif_stop_queue(dev); netif_carrier_off(dev); spin_unlock_irq(&priv->driver_lock); schedule_work(&priv->mcast_work); lbs_deb_leave(LBS_DEB_MESH); return 0; } /** * @brief This function closes the ethX interface * * @param dev A pointer to net_device structure * @return 0 */ static int lbs_eth_stop(struct net_device *dev) { struct lbs_private *priv = (struct lbs_private *) dev->priv; lbs_deb_enter(LBS_DEB_NET); spin_lock_irq(&priv->driver_lock); priv->infra_open = 0; netif_stop_queue(dev); spin_unlock_irq(&priv->driver_lock); schedule_work(&priv->mcast_work); lbs_deb_leave(LBS_DEB_NET); return 0; } static void lbs_tx_timeout(struct net_device *dev) { struct lbs_private *priv = (struct lbs_private *) dev->priv; lbs_deb_enter(LBS_DEB_TX); lbs_pr_err("tx watch dog timeout\n"); dev->trans_start = jiffies; if (priv->currenttxskb) lbs_send_tx_feedback(priv, 0); /* XX: Shouldn't we also call into the hw-specific driver to kick it somehow? */ lbs_host_to_card_done(priv); /* More often than not, this actually happens because the firmware has crapped itself -- rather than just a very busy medium. So send a harmless command, and if/when _that_ times out, we'll kick it in the head. */ lbs_prepare_and_send_command(priv, CMD_802_11_RSSI, 0, 0, 0, NULL); lbs_deb_leave(LBS_DEB_TX); } void lbs_host_to_card_done(struct lbs_private *priv) { unsigned long flags; lbs_deb_enter(LBS_DEB_THREAD); spin_lock_irqsave(&priv->driver_lock, flags); priv->dnld_sent = DNLD_RES_RECEIVED; /* Wake main thread if commands are pending */ if (!priv->cur_cmd || priv->tx_pending_len > 0) wake_up_interruptible(&priv->waitq); spin_unlock_irqrestore(&priv->driver_lock, flags); lbs_deb_leave(LBS_DEB_THREAD); } EXPORT_SYMBOL_GPL(lbs_host_to_card_done); /** * @brief This function returns the network statistics * * @param dev A pointer to struct lbs_private structure * @return A pointer to net_device_stats structure */ static struct net_device_stats *lbs_get_stats(struct net_device *dev) { struct lbs_private *priv = (struct lbs_private *) dev->priv; lbs_deb_enter(LBS_DEB_NET); return &priv->stats; } static int lbs_set_mac_address(struct net_device *dev, void *addr) { int ret = 0; struct lbs_private *priv = (struct lbs_private *) dev->priv; struct sockaddr *phwaddr = addr; struct cmd_ds_802_11_mac_address cmd; lbs_deb_enter(LBS_DEB_NET); /* In case it was called from the mesh device */ dev = priv->dev; cmd.hdr.size = cpu_to_le16(sizeof(cmd)); cmd.action = cpu_to_le16(CMD_ACT_SET); memcpy(cmd.macadd, phwaddr->sa_data, ETH_ALEN); ret = lbs_cmd_with_response(priv, CMD_802_11_MAC_ADDRESS, &cmd); if (ret) { lbs_deb_net("set MAC address failed\n"); goto done; } memcpy(priv->current_addr, phwaddr->sa_data, ETH_ALEN); memcpy(dev->dev_addr, phwaddr->sa_data, ETH_ALEN); if (priv->mesh_dev) memcpy(priv->mesh_dev->dev_addr, phwaddr->sa_data, ETH_ALEN); done: lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret); return ret; } static inline int mac_in_list(unsigned char *list, int list_len, unsigned char *mac) { while (list_len) { if (!memcmp(list, mac, ETH_ALEN)) return 1; list += ETH_ALEN; list_len--; } return 0; } static int lbs_add_mcast_addrs(struct cmd_ds_mac_multicast_adr *cmd, struct net_device *dev, int nr_addrs) { int i = nr_addrs; struct dev_mc_list *mc_list; DECLARE_MAC_BUF(mac); if ((dev->flags & (IFF_UP|IFF_MULTICAST)) != (IFF_UP|IFF_MULTICAST)) return nr_addrs; netif_tx_lock_bh(dev); for (mc_list = dev->mc_list; mc_list; mc_list = mc_list->next) { if (mac_in_list(cmd->maclist, nr_addrs, mc_list->dmi_addr)) { lbs_deb_net("mcast address %s:%s skipped\n", dev->name, print_mac(mac, mc_list->dmi_addr)); continue; } if (i == MRVDRV_MAX_MULTICAST_LIST_SIZE) break; memcpy(&cmd->maclist[6*i], mc_list->dmi_addr, ETH_ALEN); lbs_deb_net("mcast address %s:%s added to filter\n", dev->name, print_mac(mac, mc_list->dmi_addr)); i++; } netif_tx_unlock_bh(dev); if (mc_list) return -EOVERFLOW; return i; } static void lbs_set_mcast_worker(struct work_struct *work) { struct lbs_private *priv = container_of(work, struct lbs_private, mcast_work); struct cmd_ds_mac_multicast_adr mcast_cmd; int dev_flags; int nr_addrs; int old_mac_control = priv->mac_control; lbs_deb_enter(LBS_DEB_NET); dev_flags = priv->dev->flags; if (priv->mesh_dev) dev_flags |= priv->mesh_dev->flags; if (dev_flags & IFF_PROMISC) { priv->mac_control |= CMD_ACT_MAC_PROMISCUOUS_ENABLE; priv->mac_control &= ~(CMD_ACT_MAC_ALL_MULTICAST_ENABLE | CMD_ACT_MAC_MULTICAST_ENABLE); goto out_set_mac_control; } else if (dev_flags & IFF_ALLMULTI) { do_allmulti: priv->mac_control |= CMD_ACT_MAC_ALL_MULTICAST_ENABLE; priv->mac_control &= ~(CMD_ACT_MAC_PROMISCUOUS_ENABLE | CMD_ACT_MAC_MULTICAST_ENABLE); goto out_set_mac_control; } /* Once for priv->dev, again for priv->mesh_dev if it exists */ nr_addrs = lbs_add_mcast_addrs(&mcast_cmd, priv->dev, 0); if (nr_addrs >= 0 && priv->mesh_dev) nr_addrs = lbs_add_mcast_addrs(&mcast_cmd, priv->mesh_dev, nr_addrs); if (nr_addrs < 0) goto do_allmulti; if (nr_addrs) { int size = offsetof(struct cmd_ds_mac_multicast_adr, maclist[6*nr_addrs]); mcast_cmd.action = cpu_to_le16(CMD_ACT_SET); mcast_cmd.hdr.size = cpu_to_le16(size); mcast_cmd.nr_of_adrs = cpu_to_le16(nr_addrs); lbs_cmd_async(priv, CMD_MAC_MULTICAST_ADR, &mcast_cmd.hdr, size); priv->mac_control |= CMD_ACT_MAC_MULTICAST_ENABLE; } else priv->mac_control &= ~CMD_ACT_MAC_MULTICAST_ENABLE; priv->mac_control &= ~(CMD_ACT_MAC_PROMISCUOUS_ENABLE | CMD_ACT_MAC_ALL_MULTICAST_ENABLE); out_set_mac_control: if (priv->mac_control != old_mac_control) lbs_set_mac_control(priv); lbs_deb_leave(LBS_DEB_NET); } static void lbs_set_multicast_list(struct net_device *dev) { struct lbs_private *priv = dev->priv; schedule_work(&priv->mcast_work); } /** * @brief This function handles the major jobs in the LBS driver. * It handles all events generated by firmware, RX data received * from firmware and TX data sent from kernel. * * @param data A pointer to lbs_thread structure * @return 0 */ static int lbs_thread(void *data) { struct net_device *dev = data; struct lbs_private *priv = dev->priv; wait_queue_t wait; lbs_deb_enter(LBS_DEB_THREAD); init_waitqueue_entry(&wait, current); for (;;) { int shouldsleep; u8 resp_idx; lbs_deb_thread("1: currenttxskb %p, dnld_sent %d\n", priv->currenttxskb, priv->dnld_sent); add_wait_queue(&priv->waitq, &wait); set_current_state(TASK_INTERRUPTIBLE); spin_lock_irq(&priv->driver_lock); if (kthread_should_stop()) shouldsleep = 0; /* Bye */ else if (priv->surpriseremoved) shouldsleep = 1; /* We need to wait until we're _told_ to die */ else if (priv->psstate == PS_STATE_SLEEP) shouldsleep = 1; /* Sleep mode. Nothing we can do till it wakes */ else if (priv->cmd_timed_out) shouldsleep = 0; /* Command timed out. Recover */ else if (!priv->fw_ready) shouldsleep = 1; /* Firmware not ready. We're waiting for it */ else if (priv->dnld_sent) shouldsleep = 1; /* Something is en route to the device already */ else if (priv->tx_pending_len > 0) shouldsleep = 0; /* We've a packet to send */ else if (priv->cur_cmd) shouldsleep = 1; /* Can't send a command; one already running */ else if (!list_empty(&priv->cmdpendingq)) shouldsleep = 0; /* We have a command to send */ else if (__kfifo_len(priv->event_fifo)) shouldsleep = 0; /* We have an event to process */ else if (priv->resp_len[priv->resp_idx]) shouldsleep = 0; /* We have a command response */ else shouldsleep = 1; /* No command */ if (shouldsleep) { lbs_deb_thread("sleeping, connect_status %d, " "psmode %d, psstate %d\n", priv->connect_status, priv->psmode, priv->psstate); spin_unlock_irq(&priv->driver_lock); schedule(); } else spin_unlock_irq(&priv->driver_lock); lbs_deb_thread("2: currenttxskb %p, dnld_send %d\n", priv->currenttxskb, priv->dnld_sent); set_current_state(TASK_RUNNING); remove_wait_queue(&priv->waitq, &wait); lbs_deb_thread("3: currenttxskb %p, dnld_sent %d\n", priv->currenttxskb, priv->dnld_sent); if (kthread_should_stop()) { lbs_deb_thread("break from main thread\n"); break; } if (priv->surpriseremoved) { lbs_deb_thread("adapter removed; waiting to die...\n"); continue; } lbs_deb_thread("4: currenttxskb %p, dnld_sent %d\n", priv->currenttxskb, priv->dnld_sent); spin_lock_irq(&priv->driver_lock); /* Process any pending command response */ resp_idx = priv->resp_idx; if (priv->resp_len[resp_idx]) { spin_unlock_irq(&priv->driver_lock); lbs_process_command_response(priv, priv->resp_buf[resp_idx], priv->resp_len[resp_idx]); spin_lock_irq(&priv->driver_lock); priv->resp_len[resp_idx] = 0; } spin_unlock_irq(&priv->driver_lock); /* command timeout stuff */ if (priv->cmd_timed_out && priv->cur_cmd) { struct cmd_ctrl_node *cmdnode = priv->cur_cmd; if (++priv->nr_retries > 3) { lbs_pr_info("Excessive timeouts submitting " "command 0x%04x\n", le16_to_cpu(cmdnode->cmdbuf->command)); lbs_complete_command(priv, cmdnode, -ETIMEDOUT); priv->nr_retries = 0; if (priv->reset_card) priv->reset_card(priv); } else { priv->cur_cmd = NULL; lbs_pr_info("requeueing command 0x%04x due " "to timeout (#%d)\n", le16_to_cpu(cmdnode->cmdbuf->command), priv->nr_retries); /* Stick it back at the _top_ of the pending queue for immediate resubmission */ list_add(&cmdnode->list, &priv->cmdpendingq); } } priv->cmd_timed_out = 0; /* Process hardware events, e.g. card removed, link lost */ spin_lock_irq(&priv->driver_lock); while (__kfifo_len(priv->event_fifo)) { u32 event; __kfifo_get(priv->event_fifo, (unsigned char *) &event, sizeof(event)); spin_unlock_irq(&priv->driver_lock); lbs_process_event(priv, event); spin_lock_irq(&priv->driver_lock); } spin_unlock_irq(&priv->driver_lock); if (!priv->fw_ready) continue; /* Check if we need to confirm Sleep Request received previously */ if (priv->psstate == PS_STATE_PRE_SLEEP && !priv->dnld_sent && !priv->cur_cmd) { if (priv->connect_status == LBS_CONNECTED) { lbs_deb_thread("pre-sleep, currenttxskb %p, " "dnld_sent %d, cur_cmd %p\n", priv->currenttxskb, priv->dnld_sent, priv->cur_cmd); lbs_ps_confirm_sleep(priv); } else { /* workaround for firmware sending * deauth/linkloss event immediately * after sleep request; remove this * after firmware fixes it */ priv->psstate = PS_STATE_AWAKE; lbs_pr_alert("ignore PS_SleepConfirm in " "non-connected state\n"); } } /* The PS state is changed during processing of Sleep Request * event above */ if ((priv->psstate == PS_STATE_SLEEP) || (priv->psstate == PS_STATE_PRE_SLEEP)) continue; /* Execute the next command */ if (!priv->dnld_sent && !priv->cur_cmd) lbs_execute_next_command(priv); /* Wake-up command waiters which can't sleep in * lbs_prepare_and_send_command */ if (!list_empty(&priv->cmdpendingq)) wake_up_all(&priv->cmd_pending); spin_lock_irq(&priv->driver_lock); if (!priv->dnld_sent && priv->tx_pending_len > 0) { int ret = priv->hw_host_to_card(priv, MVMS_DAT, priv->tx_pending_buf, priv->tx_pending_len); if (ret) { lbs_deb_tx("host_to_card failed %d\n", ret); priv->dnld_sent = DNLD_RES_RECEIVED; } priv->tx_pending_len = 0; if (!priv->currenttxskb) { /* We can wake the queues immediately if we aren't waiting for TX feedback */ if (priv->connect_status == LBS_CONNECTED) netif_wake_queue(priv->dev); if (priv->mesh_dev && priv->mesh_connect_status == LBS_CONNECTED) netif_wake_queue(priv->mesh_dev); } } spin_unlock_irq(&priv->driver_lock); } del_timer(&priv->command_timer); wake_up_all(&priv->cmd_pending); lbs_deb_leave(LBS_DEB_THREAD); return 0; } static int lbs_suspend_callback(struct lbs_private *priv, unsigned long dummy, struct cmd_header *cmd) { lbs_deb_enter(LBS_DEB_FW); netif_device_detach(priv->dev); if (priv->mesh_dev) netif_device_detach(priv->mesh_dev); priv->fw_ready = 0; lbs_deb_leave(LBS_DEB_FW); return 0; } int lbs_suspend(struct lbs_private *priv) { struct cmd_header cmd; int ret; lbs_deb_enter(LBS_DEB_FW); if (priv->wol_criteria == 0xffffffff) { lbs_pr_info("Suspend attempt without configuring wake params!\n"); return -EINVAL; } memset(&cmd, 0, sizeof(cmd)); ret = __lbs_cmd(priv, CMD_802_11_HOST_SLEEP_ACTIVATE, &cmd, sizeof(cmd), lbs_suspend_callback, 0); if (ret) lbs_pr_info("HOST_SLEEP_ACTIVATE failed: %d\n", ret); lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret); return ret; } EXPORT_SYMBOL_GPL(lbs_suspend); void lbs_resume(struct lbs_private *priv) { lbs_deb_enter(LBS_DEB_FW); priv->fw_ready = 1; /* Firmware doesn't seem to give us RX packets any more until we send it some command. Might as well update */ lbs_prepare_and_send_command(priv, CMD_802_11_RSSI, 0, 0, 0, NULL); netif_device_attach(priv->dev); if (priv->mesh_dev) netif_device_attach(priv->mesh_dev); lbs_deb_leave(LBS_DEB_FW); } EXPORT_SYMBOL_GPL(lbs_resume); /** * @brief This function downloads firmware image, gets * HW spec from firmware and set basic parameters to * firmware. * * @param priv A pointer to struct lbs_private structure * @return 0 or -1 */ static int lbs_setup_firmware(struct lbs_private *priv) { int ret = -1; lbs_deb_enter(LBS_DEB_FW); /* * Read MAC address from HW */ memset(priv->current_addr, 0xff, ETH_ALEN); ret = lbs_update_hw_spec(priv); if (ret) goto done; lbs_set_mac_control(priv); done: lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret); return ret; } /** * This function handles the timeout of command sending. * It will re-send the same command again. */ static void command_timer_fn(unsigned long data) { struct lbs_private *priv = (struct lbs_private *)data; unsigned long flags; lbs_deb_enter(LBS_DEB_CMD); spin_lock_irqsave(&priv->driver_lock, flags); if (!priv->cur_cmd) goto out; lbs_pr_info("command 0x%04x timed out\n", le16_to_cpu(priv->cur_cmd->cmdbuf->command)); priv->cmd_timed_out = 1; wake_up_interruptible(&priv->waitq); out: spin_unlock_irqrestore(&priv->driver_lock, flags); lbs_deb_leave(LBS_DEB_CMD); } static void lbs_sync_channel_worker(struct work_struct *work) { struct lbs_private *priv = container_of(work, struct lbs_private, sync_channel); lbs_deb_enter(LBS_DEB_MAIN); if (lbs_update_channel(priv)) lbs_pr_info("Channel synchronization failed."); lbs_deb_leave(LBS_DEB_MAIN); } static int lbs_init_adapter(struct lbs_private *priv) { size_t bufsize; int i, ret = 0; lbs_deb_enter(LBS_DEB_MAIN); /* Allocate buffer to store the BSSID list */ bufsize = MAX_NETWORK_COUNT * sizeof(struct bss_descriptor); priv->networks = kzalloc(bufsize, GFP_KERNEL); if (!priv->networks) { lbs_pr_err("Out of memory allocating beacons\n"); ret = -1; goto out; } /* Initialize scan result lists */ INIT_LIST_HEAD(&priv->network_free_list); INIT_LIST_HEAD(&priv->network_list); for (i = 0; i < MAX_NETWORK_COUNT; i++) { list_add_tail(&priv->networks[i].list, &priv->network_free_list); } memset(priv->current_addr, 0xff, ETH_ALEN); priv->connect_status = LBS_DISCONNECTED; priv->mesh_connect_status = LBS_DISCONNECTED; priv->secinfo.auth_mode = IW_AUTH_ALG_OPEN_SYSTEM; priv->mode = IW_MODE_INFRA; priv->curbssparams.channel = DEFAULT_AD_HOC_CHANNEL; priv->mac_control = CMD_ACT_MAC_RX_ON | CMD_ACT_MAC_TX_ON; priv->radioon = RADIO_ON; priv->auto_rate = 1; priv->capability = WLAN_CAPABILITY_SHORT_PREAMBLE; priv->psmode = LBS802_11POWERMODECAM; priv->psstate = PS_STATE_FULL_POWER; mutex_init(&priv->lock); setup_timer(&priv->command_timer, command_timer_fn, (unsigned long)priv); INIT_LIST_HEAD(&priv->cmdfreeq); INIT_LIST_HEAD(&priv->cmdpendingq); spin_lock_init(&priv->driver_lock); init_waitqueue_head(&priv->cmd_pending); /* Allocate the command buffers */ if (lbs_allocate_cmd_buffer(priv)) { lbs_pr_err("Out of memory allocating command buffers\n"); ret = -ENOMEM; goto out; } priv->resp_idx = 0; priv->resp_len[0] = priv->resp_len[1] = 0; /* Create the event FIFO */ priv->event_fifo = kfifo_alloc(sizeof(u32) * 16, GFP_KERNEL, NULL); if (IS_ERR(priv->event_fifo)) { lbs_pr_err("Out of memory allocating event FIFO buffer\n"); ret = -ENOMEM; goto out; } out: lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret); return ret; } static void lbs_free_adapter(struct lbs_private *priv) { lbs_deb_enter(LBS_DEB_MAIN); lbs_free_cmd_buffer(priv); if (priv->event_fifo) kfifo_free(priv->event_fifo); del_timer(&priv->command_timer); kfree(priv->networks); priv->networks = NULL; lbs_deb_leave(LBS_DEB_MAIN); } /** * @brief This function adds the card. it will probe the * card, allocate the lbs_priv and initialize the device. * * @param card A pointer to card * @return A pointer to struct lbs_private structure */ struct lbs_private *lbs_add_card(void *card, struct device *dmdev) { struct net_device *dev = NULL; struct lbs_private *priv = NULL; lbs_deb_enter(LBS_DEB_MAIN); /* Allocate an Ethernet device and register it */ dev = alloc_etherdev(sizeof(struct lbs_private)); if (!dev) { lbs_pr_err("init ethX device failed\n"); goto done; } priv = dev->priv; if (lbs_init_adapter(priv)) { lbs_pr_err("failed to initialize adapter structure.\n"); goto err_init_adapter; } priv->dev = dev; priv->card = card; priv->mesh_open = 0; priv->infra_open = 0; /* Setup the OS Interface to our functions */ dev->open = lbs_dev_open; dev->hard_start_xmit = lbs_hard_start_xmit; dev->stop = lbs_eth_stop; dev->set_mac_address = lbs_set_mac_address; dev->tx_timeout = lbs_tx_timeout; dev->get_stats = lbs_get_stats; dev->watchdog_timeo = 5 * HZ; dev->ethtool_ops = &lbs_ethtool_ops; #ifdef WIRELESS_EXT dev->wireless_handlers = (struct iw_handler_def *)&lbs_handler_def; #endif dev->flags |= IFF_BROADCAST | IFF_MULTICAST; dev->set_multicast_list = lbs_set_multicast_list; SET_NETDEV_DEV(dev, dmdev); priv->rtap_net_dev = NULL; lbs_deb_thread("Starting main thread...\n"); init_waitqueue_head(&priv->waitq); priv->main_thread = kthread_run(lbs_thread, dev, "lbs_main"); if (IS_ERR(priv->main_thread)) { lbs_deb_thread("Error creating main thread.\n"); goto err_init_adapter; } priv->work_thread = create_singlethread_workqueue("lbs_worker"); INIT_DELAYED_WORK(&priv->assoc_work, lbs_association_worker); INIT_DELAYED_WORK(&priv->scan_work, lbs_scan_worker); INIT_WORK(&priv->mcast_work, lbs_set_mcast_worker); INIT_WORK(&priv->sync_channel, lbs_sync_channel_worker); sprintf(priv->mesh_ssid, "mesh"); priv->mesh_ssid_len = 4; priv->wol_criteria = 0xffffffff; priv->wol_gpio = 0xff; goto done; err_init_adapter: lbs_free_adapter(priv); free_netdev(dev); priv = NULL; done: lbs_deb_leave_args(LBS_DEB_MAIN, "priv %p", priv); return priv; } EXPORT_SYMBOL_GPL(lbs_add_card); void lbs_remove_card(struct lbs_private *priv) { struct net_device *dev = priv->dev; union iwreq_data wrqu; lbs_deb_enter(LBS_DEB_MAIN); lbs_remove_mesh(priv); lbs_remove_rtap(priv); dev = priv->dev; cancel_delayed_work_sync(&priv->scan_work); cancel_delayed_work_sync(&priv->assoc_work); cancel_work_sync(&priv->mcast_work); destroy_workqueue(priv->work_thread); if (priv->psmode == LBS802_11POWERMODEMAX_PSP) { priv->psmode = LBS802_11POWERMODECAM; lbs_ps_wakeup(priv, CMD_OPTION_WAITFORRSP); } memset(wrqu.ap_addr.sa_data, 0xaa, ETH_ALEN); wrqu.ap_addr.sa_family = ARPHRD_ETHER; wireless_send_event(priv->dev, SIOCGIWAP, &wrqu, NULL); /* Stop the thread servicing the interrupts */ priv->surpriseremoved = 1; kthread_stop(priv->main_thread); lbs_free_adapter(priv); priv->dev = NULL; free_netdev(dev); lbs_deb_leave(LBS_DEB_MAIN); } EXPORT_SYMBOL_GPL(lbs_remove_card); int lbs_start_card(struct lbs_private *priv) { struct net_device *dev = priv->dev; int ret = -1; lbs_deb_enter(LBS_DEB_MAIN); /* poke the firmware */ ret = lbs_setup_firmware(priv); if (ret) goto done; /* init 802.11d */ lbs_init_11d(priv); if (register_netdev(dev)) { lbs_pr_err("cannot register ethX device\n"); goto done; } if (device_create_file(&dev->dev, &dev_attr_lbs_rtap)) lbs_pr_err("cannot register lbs_rtap attribute\n"); lbs_update_channel(priv); /* 5.0.16p0 is known to NOT support any mesh */ if (priv->fwrelease > 0x05001000) { /* Enable mesh, if supported, and work out which TLV it uses. 0x100 + 291 is an unofficial value used in 5.110.20.pXX 0x100 + 37 is the official value used in 5.110.21.pXX but we check them in that order because 20.pXX doesn't give an error -- it just silently fails. */ /* 5.110.20.pXX firmware will fail the command if the channel doesn't match the existing channel. But only if the TLV is correct. If the channel is wrong, _BOTH_ versions will give an error to 0x100+291, and allow 0x100+37 to succeed. It's just that 5.110.20.pXX will not have done anything useful */ priv->mesh_tlv = 0x100 + 291; if (lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_START, priv->curbssparams.channel)) { priv->mesh_tlv = 0x100 + 37; if (lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_START, priv->curbssparams.channel)) priv->mesh_tlv = 0; } if (priv->mesh_tlv) { lbs_add_mesh(priv); if (device_create_file(&dev->dev, &dev_attr_lbs_mesh)) lbs_pr_err("cannot register lbs_mesh attribute\n"); } } lbs_debugfs_init_one(priv, dev); lbs_pr_info("%s: Marvell WLAN 802.11 adapter\n", dev->name); ret = 0; done: lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret); return ret; } EXPORT_SYMBOL_GPL(lbs_start_card); void lbs_stop_card(struct lbs_private *priv) { struct net_device *dev = priv->dev; struct cmd_ctrl_node *cmdnode; unsigned long flags; lbs_deb_enter(LBS_DEB_MAIN); if (!priv) goto out; netif_stop_queue(priv->dev); netif_carrier_off(priv->dev); lbs_debugfs_remove_one(priv); device_remove_file(&dev->dev, &dev_attr_lbs_rtap); if (priv->mesh_tlv) { device_remove_file(&dev->dev, &dev_attr_lbs_mesh); } /* Flush pending command nodes */ del_timer_sync(&priv->command_timer); spin_lock_irqsave(&priv->driver_lock, flags); list_for_each_entry(cmdnode, &priv->cmdpendingq, list) { cmdnode->result = -ENOENT; cmdnode->cmdwaitqwoken = 1; wake_up_interruptible(&cmdnode->cmdwait_q); } spin_unlock_irqrestore(&priv->driver_lock, flags); unregister_netdev(dev); out: lbs_deb_leave(LBS_DEB_MAIN); } EXPORT_SYMBOL_GPL(lbs_stop_card); /** * @brief This function adds mshX interface * * @param priv A pointer to the struct lbs_private structure * @return 0 if successful, -X otherwise */ static int lbs_add_mesh(struct lbs_private *priv) { struct net_device *mesh_dev = NULL; int ret = 0; lbs_deb_enter(LBS_DEB_MESH); /* Allocate a virtual mesh device */ if (!(mesh_dev = alloc_netdev(0, "msh%d", ether_setup))) { lbs_deb_mesh("init mshX device failed\n"); ret = -ENOMEM; goto done; } mesh_dev->priv = priv; priv->mesh_dev = mesh_dev; mesh_dev->open = lbs_dev_open; mesh_dev->hard_start_xmit = lbs_hard_start_xmit; mesh_dev->stop = lbs_mesh_stop; mesh_dev->get_stats = lbs_get_stats; mesh_dev->set_mac_address = lbs_set_mac_address; mesh_dev->ethtool_ops = &lbs_ethtool_ops; memcpy(mesh_dev->dev_addr, priv->dev->dev_addr, sizeof(priv->dev->dev_addr)); SET_NETDEV_DEV(priv->mesh_dev, priv->dev->dev.parent); #ifdef WIRELESS_EXT mesh_dev->wireless_handlers = (struct iw_handler_def *)&mesh_handler_def; #endif mesh_dev->flags |= IFF_BROADCAST | IFF_MULTICAST; mesh_dev->set_multicast_list = lbs_set_multicast_list; /* Register virtual mesh interface */ ret = register_netdev(mesh_dev); if (ret) { lbs_pr_err("cannot register mshX virtual interface\n"); goto err_free; } ret = sysfs_create_group(&(mesh_dev->dev.kobj), &lbs_mesh_attr_group); if (ret) goto err_unregister; lbs_persist_config_init(mesh_dev); /* Everything successful */ ret = 0; goto done; err_unregister: unregister_netdev(mesh_dev); err_free: free_netdev(mesh_dev); done: lbs_deb_leave_args(LBS_DEB_MESH, "ret %d", ret); return ret; } static void lbs_remove_mesh(struct lbs_private *priv) { struct net_device *mesh_dev; mesh_dev = priv->mesh_dev; if (!mesh_dev) return; lbs_deb_enter(LBS_DEB_MESH); netif_stop_queue(mesh_dev); netif_carrier_off(mesh_dev); sysfs_remove_group(&(mesh_dev->dev.kobj), &lbs_mesh_attr_group); lbs_persist_config_remove(mesh_dev); unregister_netdev(mesh_dev); priv->mesh_dev = NULL; free_netdev(mesh_dev); lbs_deb_leave(LBS_DEB_MESH); } /** * @brief This function finds the CFP in * region_cfp_table based on region and band parameter. * * @param region The region code * @param band The band * @param cfp_no A pointer to CFP number * @return A pointer to CFP */ struct chan_freq_power *lbs_get_region_cfp_table(u8 region, int *cfp_no) { int i, end; lbs_deb_enter(LBS_DEB_MAIN); end = ARRAY_SIZE(region_cfp_table); for (i = 0; i < end ; i++) { lbs_deb_main("region_cfp_table[i].region=%d\n", region_cfp_table[i].region); if (region_cfp_table[i].region == region) { *cfp_no = region_cfp_table[i].cfp_no_BG; lbs_deb_leave(LBS_DEB_MAIN); return region_cfp_table[i].cfp_BG; } } lbs_deb_leave_args(LBS_DEB_MAIN, "ret NULL"); return NULL; } int lbs_set_regiontable(struct lbs_private *priv, u8 region, u8 band) { int ret = 0; int i = 0; struct chan_freq_power *cfp; int cfp_no; lbs_deb_enter(LBS_DEB_MAIN); memset(priv->region_channel, 0, sizeof(priv->region_channel)); cfp = lbs_get_region_cfp_table(region, &cfp_no); if (cfp != NULL) { priv->region_channel[i].nrcfp = cfp_no; priv->region_channel[i].CFP = cfp; } else { lbs_deb_main("wrong region code %#x in band B/G\n", region); ret = -1; goto out; } priv->region_channel[i].valid = 1; priv->region_channel[i].region = region; priv->region_channel[i].band = band; i++; out: lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret); return ret; } void lbs_queue_event(struct lbs_private *priv, u32 event) { unsigned long flags; lbs_deb_enter(LBS_DEB_THREAD); spin_lock_irqsave(&priv->driver_lock, flags); if (priv->psstate == PS_STATE_SLEEP) priv->psstate = PS_STATE_AWAKE; __kfifo_put(priv->event_fifo, (unsigned char *) &event, sizeof(u32)); wake_up_interruptible(&priv->waitq); spin_unlock_irqrestore(&priv->driver_lock, flags); lbs_deb_leave(LBS_DEB_THREAD); } EXPORT_SYMBOL_GPL(lbs_queue_event); void lbs_notify_command_response(struct lbs_private *priv, u8 resp_idx) { lbs_deb_enter(LBS_DEB_THREAD); if (priv->psstate == PS_STATE_SLEEP) priv->psstate = PS_STATE_AWAKE; /* Swap buffers by flipping the response index */ BUG_ON(resp_idx > 1); priv->resp_idx = resp_idx; wake_up_interruptible(&priv->waitq); lbs_deb_leave(LBS_DEB_THREAD); } EXPORT_SYMBOL_GPL(lbs_notify_command_response); static int __init lbs_init_module(void) { lbs_deb_enter(LBS_DEB_MAIN); memset(&confirm_sleep, 0, sizeof(confirm_sleep)); confirm_sleep.hdr.command = cpu_to_le16(CMD_802_11_PS_MODE); confirm_sleep.hdr.size = cpu_to_le16(sizeof(confirm_sleep)); confirm_sleep.action = cpu_to_le16(CMD_SUBCMD_SLEEP_CONFIRMED); lbs_debugfs_init(); lbs_deb_leave(LBS_DEB_MAIN); return 0; } static void __exit lbs_exit_module(void) { lbs_deb_enter(LBS_DEB_MAIN); lbs_debugfs_remove(); lbs_deb_leave(LBS_DEB_MAIN); } /* * rtap interface support fuctions */ static int lbs_rtap_open(struct net_device *dev) { /* Yes, _stop_ the queue. Because we don't support injection */ lbs_deb_enter(LBS_DEB_MAIN); netif_carrier_off(dev); netif_stop_queue(dev); lbs_deb_leave(LBS_DEB_LEAVE); return 0; } static int lbs_rtap_stop(struct net_device *dev) { lbs_deb_enter(LBS_DEB_MAIN); lbs_deb_leave(LBS_DEB_MAIN); return 0; } static int lbs_rtap_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) { netif_stop_queue(dev); return NETDEV_TX_BUSY; } static struct net_device_stats *lbs_rtap_get_stats(struct net_device *dev) { struct lbs_private *priv = dev->priv; lbs_deb_enter(LBS_DEB_NET); return &priv->stats; } static void lbs_remove_rtap(struct lbs_private *priv) { lbs_deb_enter(LBS_DEB_MAIN); if (priv->rtap_net_dev == NULL) goto out; unregister_netdev(priv->rtap_net_dev); free_netdev(priv->rtap_net_dev); priv->rtap_net_dev = NULL; out: lbs_deb_leave(LBS_DEB_MAIN); } static int lbs_add_rtap(struct lbs_private *priv) { int ret = 0; struct net_device *rtap_dev; lbs_deb_enter(LBS_DEB_MAIN); if (priv->rtap_net_dev) { ret = -EPERM; goto out; } rtap_dev = alloc_netdev(0, "rtap%d", ether_setup); if (rtap_dev == NULL) { ret = -ENOMEM; goto out; } memcpy(rtap_dev->dev_addr, priv->current_addr, ETH_ALEN); rtap_dev->type = ARPHRD_IEEE80211_RADIOTAP; rtap_dev->open = lbs_rtap_open; rtap_dev->stop = lbs_rtap_stop; rtap_dev->get_stats = lbs_rtap_get_stats; rtap_dev->hard_start_xmit = lbs_rtap_hard_start_xmit; rtap_dev->priv = priv; ret = register_netdev(rtap_dev); if (ret) { free_netdev(rtap_dev); goto out; } priv->rtap_net_dev = rtap_dev; out: lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret); return ret; } #ifndef CONFIG_IEEE80211 const char *escape_essid(const char *essid, u8 essid_len) { static char escaped[IW_ESSID_MAX_SIZE * 2 + 1]; const char *s = essid; char *d = escaped; if (ieee80211_is_empty_essid(essid, essid_len)) { memcpy(escaped, "", sizeof("")); return escaped; } essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE); while (essid_len--) { if (*s == '\0') { *d++ = '\\'; *d++ = '0'; s++; } else { *d++ = *s++; } } *d = '\0'; return escaped; } #endif module_init(lbs_init_module); module_exit(lbs_exit_module); MODULE_DESCRIPTION("Libertas WLAN Driver Library"); MODULE_AUTHOR("Marvell International Ltd."); MODULE_LICENSE("GPL");