diff options
Diffstat (limited to 'drivers/net/wireless/libertas/main.c')
| -rw-r--r-- | drivers/net/wireless/libertas/main.c | 1225 |
1 files changed, 1225 insertions, 0 deletions
diff --git a/drivers/net/wireless/libertas/main.c b/drivers/net/wireless/libertas/main.c new file mode 100644 index 000000000..8079560f4 --- /dev/null +++ b/drivers/net/wireless/libertas/main.c @@ -0,0 +1,1225 @@ +/* + * This file contains the major functions in WLAN + * driver. It includes init, exit, open, close and main + * thread etc.. + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/module.h> +#include <linux/delay.h> +#include <linux/etherdevice.h> +#include <linux/hardirq.h> +#include <linux/netdevice.h> +#include <linux/if_arp.h> +#include <linux/kthread.h> +#include <linux/kfifo.h> +#include <linux/slab.h> +#include <net/cfg80211.h> + +#include "host.h" +#include "decl.h" +#include "dev.h" +#include "cfg.h" +#include "debugfs.h" +#include "cmd.h" +#include "mesh.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); + +unsigned int lbs_disablemesh; +EXPORT_SYMBOL_GPL(lbs_disablemesh); +module_param_named(libertas_disablemesh, lbs_disablemesh, 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; + + +/* + * the table to keep region code + */ +u16 lbs_region_code_to_index[MRVDRV_MAX_REGION_CODE] = + { 0x10, 0x20, 0x30, 0x31, 0x32, 0x40 }; + +/* + * 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 +}; + +/** + * lbs_fw_index_to_data_rate - use index to get the data rate + * + * @idx: The index of data rate + * returns: 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]; +} + +/** + * lbs_data_rate_to_fw_index - use rate to get the index + * + * @rate: data rate + * returns: 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; +} + +int lbs_set_iface_type(struct lbs_private *priv, enum nl80211_iftype type) +{ + int ret = 0; + + switch (type) { + case NL80211_IFTYPE_MONITOR: + ret = lbs_set_monitor_mode(priv, 1); + break; + case NL80211_IFTYPE_STATION: + if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR) + ret = lbs_set_monitor_mode(priv, 0); + if (!ret) + ret = lbs_set_snmp_mib(priv, SNMP_MIB_OID_BSS_TYPE, 1); + break; + case NL80211_IFTYPE_ADHOC: + if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR) + ret = lbs_set_monitor_mode(priv, 0); + if (!ret) + ret = lbs_set_snmp_mib(priv, SNMP_MIB_OID_BSS_TYPE, 2); + break; + default: + ret = -ENOTSUPP; + } + return ret; +} + +int lbs_start_iface(struct lbs_private *priv) +{ + struct cmd_ds_802_11_mac_address cmd; + int ret; + + if (priv->power_restore) { + ret = priv->power_restore(priv); + if (ret) + return ret; + } + + cmd.hdr.size = cpu_to_le16(sizeof(cmd)); + cmd.action = cpu_to_le16(CMD_ACT_SET); + memcpy(cmd.macadd, priv->current_addr, 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 err; + } + + ret = lbs_set_iface_type(priv, priv->wdev->iftype); + if (ret) { + lbs_deb_net("set iface type failed\n"); + goto err; + } + + ret = lbs_set_11d_domain_info(priv); + if (ret) { + lbs_deb_net("set 11d domain info failed\n"); + goto err; + } + + lbs_update_channel(priv); + + priv->iface_running = true; + return 0; + +err: + if (priv->power_save) + priv->power_save(priv); + return ret; +} + +/** + * lbs_dev_open - open the ethX interface + * + * @dev: A pointer to &net_device structure + * returns: 0 or -EBUSY if monitor mode active + */ +static int lbs_dev_open(struct net_device *dev) +{ + struct lbs_private *priv = dev->ml_priv; + int ret = 0; + + lbs_deb_enter(LBS_DEB_NET); + if (!priv->iface_running) { + ret = lbs_start_iface(priv); + if (ret) + goto out; + } + + spin_lock_irq(&priv->driver_lock); + + netif_carrier_off(dev); + + if (!priv->tx_pending_len) + netif_wake_queue(dev); + + spin_unlock_irq(&priv->driver_lock); + +out: + lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret); + return ret; +} + +static bool lbs_command_queue_empty(struct lbs_private *priv) +{ + unsigned long flags; + bool ret; + spin_lock_irqsave(&priv->driver_lock, flags); + ret = priv->cur_cmd == NULL && list_empty(&priv->cmdpendingq); + spin_unlock_irqrestore(&priv->driver_lock, flags); + return ret; +} + +int lbs_stop_iface(struct lbs_private *priv) +{ + unsigned long flags; + int ret = 0; + + lbs_deb_enter(LBS_DEB_MAIN); + + spin_lock_irqsave(&priv->driver_lock, flags); + priv->iface_running = false; + kfree_skb(priv->currenttxskb); + priv->currenttxskb = NULL; + priv->tx_pending_len = 0; + spin_unlock_irqrestore(&priv->driver_lock, flags); + + cancel_work_sync(&priv->mcast_work); + del_timer_sync(&priv->tx_lockup_timer); + + /* Disable command processing, and wait for all commands to complete */ + lbs_deb_main("waiting for commands to complete\n"); + wait_event(priv->waitq, lbs_command_queue_empty(priv)); + lbs_deb_main("all commands completed\n"); + + if (priv->power_save) + ret = priv->power_save(priv); + + lbs_deb_leave(LBS_DEB_MAIN); + return ret; +} + +/** + * lbs_eth_stop - close the ethX interface + * + * @dev: A pointer to &net_device structure + * returns: 0 + */ +static int lbs_eth_stop(struct net_device *dev) +{ + struct lbs_private *priv = dev->ml_priv; + + lbs_deb_enter(LBS_DEB_NET); + + if (priv->connect_status == LBS_CONNECTED) + lbs_disconnect(priv, WLAN_REASON_DEAUTH_LEAVING); + + spin_lock_irq(&priv->driver_lock); + netif_stop_queue(dev); + spin_unlock_irq(&priv->driver_lock); + + lbs_update_mcast(priv); + cancel_delayed_work_sync(&priv->scan_work); + if (priv->scan_req) + lbs_scan_done(priv); + + netif_carrier_off(priv->dev); + + if (!lbs_iface_active(priv)) + lbs_stop_iface(priv); + + lbs_deb_leave(LBS_DEB_NET); + return 0; +} + +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); + del_timer(&priv->tx_lockup_timer); + + priv->dnld_sent = DNLD_RES_RECEIVED; + + /* Wake main thread if commands are pending */ + if (!priv->cur_cmd || priv->tx_pending_len > 0) { + if (!priv->wakeup_dev_required) + wake_up(&priv->waitq); + } + + spin_unlock_irqrestore(&priv->driver_lock, flags); + lbs_deb_leave(LBS_DEB_THREAD); +} +EXPORT_SYMBOL_GPL(lbs_host_to_card_done); + +int lbs_set_mac_address(struct net_device *dev, void *addr) +{ + int ret = 0; + struct lbs_private *priv = dev->ml_priv; + struct sockaddr *phwaddr = addr; + + lbs_deb_enter(LBS_DEB_NET); + + /* + * Can only set MAC address when all interfaces are down, to be written + * to the hardware when one of them is brought up. + */ + if (lbs_iface_active(priv)) + return -EBUSY; + + /* In case it was called from the mesh device */ + dev = priv->dev; + + 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); + + 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 netdev_hw_addr *ha; + int cnt; + + if ((dev->flags & (IFF_UP|IFF_MULTICAST)) != (IFF_UP|IFF_MULTICAST)) + return nr_addrs; + + netif_addr_lock_bh(dev); + cnt = netdev_mc_count(dev); + netdev_for_each_mc_addr(ha, dev) { + if (mac_in_list(cmd->maclist, nr_addrs, ha->addr)) { + lbs_deb_net("mcast address %s:%pM skipped\n", dev->name, + ha->addr); + cnt--; + continue; + } + + if (i == MRVDRV_MAX_MULTICAST_LIST_SIZE) + break; + memcpy(&cmd->maclist[6*i], ha->addr, ETH_ALEN); + lbs_deb_net("mcast address %s:%pM added to filter\n", dev->name, + ha->addr); + i++; + cnt--; + } + netif_addr_unlock_bh(dev); + if (cnt) + return -EOVERFLOW; + + return i; +} + +void lbs_update_mcast(struct lbs_private *priv) +{ + struct cmd_ds_mac_multicast_adr mcast_cmd; + int dev_flags = 0; + int nr_addrs; + int old_mac_control = priv->mac_control; + + lbs_deb_enter(LBS_DEB_NET); + + if (netif_running(priv->dev)) + dev_flags |= priv->dev->flags; + if (priv->mesh_dev && netif_running(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_mcast_worker(struct work_struct *work) +{ + struct lbs_private *priv = container_of(work, struct lbs_private, mcast_work); + lbs_update_mcast(priv); +} + +void lbs_set_multicast_list(struct net_device *dev) +{ + struct lbs_private *priv = dev->ml_priv; + + schedule_work(&priv->mcast_work); +} + +/** + * lbs_thread - 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. + * + * @data: A pointer to &lbs_thread structure + * returns: 0 + */ +static int lbs_thread(void *data) +{ + struct net_device *dev = data; + struct lbs_private *priv = dev->ml_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->resp_len[priv->resp_idx]) + shouldsleep = 0; /* We have a command response */ + else if (priv->cur_cmd) + shouldsleep = 1; /* Can't send a command; one already running */ + else if (!list_empty(&priv->cmdpendingq) && + !(priv->wakeup_dev_required)) + shouldsleep = 0; /* We have a command to send */ + else if (kfifo_len(&priv->event_fifo)) + shouldsleep = 0; /* We have an event to process */ + 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); + + /* Process any pending command response */ + spin_lock_irq(&priv->driver_lock); + 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); + + /* Process hardware events, e.g. card removed, link lost */ + spin_lock_irq(&priv->driver_lock); + while (kfifo_len(&priv->event_fifo)) { + u32 event; + + if (kfifo_out(&priv->event_fifo, + (unsigned char *) &event, sizeof(event)) != + sizeof(event)) + break; + 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->wakeup_dev_required) { + lbs_deb_thread("Waking up device...\n"); + /* Wake up device */ + if (priv->exit_deep_sleep(priv)) + lbs_deb_thread("Wakeup device failed\n"); + continue; + } + + /* command timeout stuff */ + if (priv->cmd_timed_out && priv->cur_cmd) { + struct cmd_ctrl_node *cmdnode = priv->cur_cmd; + + netdev_info(dev, "Timeout submitting command 0x%04x\n", + le16_to_cpu(cmdnode->cmdbuf->command)); + lbs_complete_command(priv, cmdnode, -ETIMEDOUT); + + /* Reset card, but only when it isn't in the process + * of being shutdown anyway. */ + if (!dev->dismantle && priv->reset_card) + priv->reset_card(priv); + } + priv->cmd_timed_out = 0; + + 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; + netdev_alert(dev, + "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; + + if (priv->is_deep_sleep) + continue; + + /* Execute the next command */ + if (!priv->dnld_sent && !priv->cur_cmd) + lbs_execute_next_command(priv); + + 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; + } else { + mod_timer(&priv->tx_lockup_timer, + jiffies + (HZ * 5)); + } + 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 && + netif_running(priv->mesh_dev)) + netif_wake_queue(priv->mesh_dev); + } + } + spin_unlock_irq(&priv->driver_lock); + } + + del_timer(&priv->command_timer); + del_timer(&priv->tx_lockup_timer); + del_timer(&priv->auto_deepsleep_timer); + + lbs_deb_leave(LBS_DEB_THREAD); + return 0; +} + +/** + * lbs_setup_firmware - gets the HW spec from the firmware and sets + * some basic parameters + * + * @priv: A pointer to &struct lbs_private structure + * returns: 0 or -1 + */ +static int lbs_setup_firmware(struct lbs_private *priv) +{ + int ret = -1; + s16 curlevel = 0, minlevel = 0, maxlevel = 0; + + lbs_deb_enter(LBS_DEB_FW); + + /* Read MAC address from firmware */ + eth_broadcast_addr(priv->current_addr); + ret = lbs_update_hw_spec(priv); + if (ret) + goto done; + + /* Read power levels if available */ + ret = lbs_get_tx_power(priv, &curlevel, &minlevel, &maxlevel); + if (ret == 0) { + priv->txpower_cur = curlevel; + priv->txpower_min = minlevel; + priv->txpower_max = maxlevel; + } + + /* Send cmd to FW to enable 11D function */ + ret = lbs_set_snmp_mib(priv, SNMP_MIB_OID_11D_ENABLE, 1); + if (ret) + goto done; + + ret = lbs_set_mac_control_sync(priv); +done: + lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret); + return ret; +} + +int lbs_suspend(struct lbs_private *priv) +{ + int ret; + + lbs_deb_enter(LBS_DEB_FW); + + if (priv->is_deep_sleep) { + ret = lbs_set_deep_sleep(priv, 0); + if (ret) { + netdev_err(priv->dev, + "deep sleep cancellation failed: %d\n", ret); + return ret; + } + priv->deep_sleep_required = 1; + } + + ret = lbs_set_host_sleep(priv, 1); + + netif_device_detach(priv->dev); + if (priv->mesh_dev) + netif_device_detach(priv->mesh_dev); + + lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret); + return ret; +} +EXPORT_SYMBOL_GPL(lbs_suspend); + +int lbs_resume(struct lbs_private *priv) +{ + int ret; + + lbs_deb_enter(LBS_DEB_FW); + + ret = lbs_set_host_sleep(priv, 0); + + netif_device_attach(priv->dev); + if (priv->mesh_dev) + netif_device_attach(priv->mesh_dev); + + if (priv->deep_sleep_required) { + priv->deep_sleep_required = 0; + ret = lbs_set_deep_sleep(priv, 1); + if (ret) + netdev_err(priv->dev, + "deep sleep activation failed: %d\n", ret); + } + + if (priv->setup_fw_on_resume) + ret = lbs_setup_firmware(priv); + + lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret); + return ret; +} +EXPORT_SYMBOL_GPL(lbs_resume); + +/** + * lbs_cmd_timeout_handler - handles the timeout of command sending. + * It will re-send the same command again. + * + * @data: &struct lbs_private pointer + */ +static void lbs_cmd_timeout_handler(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; + + netdev_info(priv->dev, "command 0x%04x timed out\n", + le16_to_cpu(priv->cur_cmd->cmdbuf->command)); + + priv->cmd_timed_out = 1; + + /* + * If the device didn't even acknowledge the command, reset the state + * so that we don't block all future commands due to this one timeout. + */ + if (priv->dnld_sent == DNLD_CMD_SENT) + priv->dnld_sent = DNLD_RES_RECEIVED; + + wake_up(&priv->waitq); +out: + spin_unlock_irqrestore(&priv->driver_lock, flags); + lbs_deb_leave(LBS_DEB_CMD); +} + +/** + * lbs_tx_lockup_handler - handles the timeout of the passing of TX frames + * to the hardware. This is known to frequently happen with SD8686 when + * waking up after a Wake-on-WLAN-triggered resume. + * + * @data: &struct lbs_private pointer + */ +static void lbs_tx_lockup_handler(unsigned long data) +{ + struct lbs_private *priv = (struct lbs_private *)data; + unsigned long flags; + + lbs_deb_enter(LBS_DEB_TX); + spin_lock_irqsave(&priv->driver_lock, flags); + + netdev_info(priv->dev, "TX lockup detected\n"); + if (priv->reset_card) + priv->reset_card(priv); + + priv->dnld_sent = DNLD_RES_RECEIVED; + wake_up_interruptible(&priv->waitq); + + spin_unlock_irqrestore(&priv->driver_lock, flags); + lbs_deb_leave(LBS_DEB_TX); +} + +/** + * auto_deepsleep_timer_fn - put the device back to deep sleep mode when + * timer expires and no activity (command, event, data etc.) is detected. + * @data: &struct lbs_private pointer + * returns: N/A + */ +static void auto_deepsleep_timer_fn(unsigned long data) +{ + struct lbs_private *priv = (struct lbs_private *)data; + + lbs_deb_enter(LBS_DEB_CMD); + + if (priv->is_activity_detected) { + priv->is_activity_detected = 0; + } else { + if (priv->is_auto_deep_sleep_enabled && + (!priv->wakeup_dev_required) && + (priv->connect_status != LBS_CONNECTED)) { + struct cmd_header cmd; + + lbs_deb_main("Entering auto deep sleep mode...\n"); + memset(&cmd, 0, sizeof(cmd)); + cmd.size = cpu_to_le16(sizeof(cmd)); + lbs_cmd_async(priv, CMD_802_11_DEEP_SLEEP, &cmd, + sizeof(cmd)); + } + } + mod_timer(&priv->auto_deepsleep_timer , jiffies + + (priv->auto_deep_sleep_timeout * HZ)/1000); + lbs_deb_leave(LBS_DEB_CMD); +} + +int lbs_enter_auto_deep_sleep(struct lbs_private *priv) +{ + lbs_deb_enter(LBS_DEB_SDIO); + + priv->is_auto_deep_sleep_enabled = 1; + if (priv->is_deep_sleep) + priv->wakeup_dev_required = 1; + mod_timer(&priv->auto_deepsleep_timer , + jiffies + (priv->auto_deep_sleep_timeout * HZ)/1000); + + lbs_deb_leave(LBS_DEB_SDIO); + return 0; +} + +int lbs_exit_auto_deep_sleep(struct lbs_private *priv) +{ + lbs_deb_enter(LBS_DEB_SDIO); + + priv->is_auto_deep_sleep_enabled = 0; + priv->auto_deep_sleep_timeout = 0; + del_timer(&priv->auto_deepsleep_timer); + + lbs_deb_leave(LBS_DEB_SDIO); + return 0; +} + +static int lbs_init_adapter(struct lbs_private *priv) +{ + int ret; + + lbs_deb_enter(LBS_DEB_MAIN); + + eth_broadcast_addr(priv->current_addr); + + priv->connect_status = LBS_DISCONNECTED; + priv->channel = DEFAULT_AD_HOC_CHANNEL; + priv->mac_control = CMD_ACT_MAC_RX_ON | CMD_ACT_MAC_TX_ON; + priv->radio_on = 1; + priv->psmode = LBS802_11POWERMODECAM; + priv->psstate = PS_STATE_FULL_POWER; + priv->is_deep_sleep = 0; + priv->is_auto_deep_sleep_enabled = 0; + priv->deep_sleep_required = 0; + priv->wakeup_dev_required = 0; + init_waitqueue_head(&priv->ds_awake_q); + init_waitqueue_head(&priv->scan_q); + priv->authtype_auto = 1; + priv->is_host_sleep_configured = 0; + priv->is_host_sleep_activated = 0; + init_waitqueue_head(&priv->host_sleep_q); + init_waitqueue_head(&priv->fw_waitq); + mutex_init(&priv->lock); + + setup_timer(&priv->command_timer, lbs_cmd_timeout_handler, + (unsigned long)priv); + setup_timer(&priv->tx_lockup_timer, lbs_tx_lockup_handler, + (unsigned long)priv); + setup_timer(&priv->auto_deepsleep_timer, auto_deepsleep_timer_fn, + (unsigned long)priv); + + INIT_LIST_HEAD(&priv->cmdfreeq); + INIT_LIST_HEAD(&priv->cmdpendingq); + + spin_lock_init(&priv->driver_lock); + + /* Allocate the command buffers */ + if (lbs_allocate_cmd_buffer(priv)) { + 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 */ + ret = kfifo_alloc(&priv->event_fifo, sizeof(u32) * 16, GFP_KERNEL); + if (ret) { + pr_err("Out of memory allocating event FIFO buffer\n"); + 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); + kfifo_free(&priv->event_fifo); + del_timer(&priv->command_timer); + del_timer(&priv->tx_lockup_timer); + del_timer(&priv->auto_deepsleep_timer); + + lbs_deb_leave(LBS_DEB_MAIN); +} + +static const struct net_device_ops lbs_netdev_ops = { + .ndo_open = lbs_dev_open, + .ndo_stop = lbs_eth_stop, + .ndo_start_xmit = lbs_hard_start_xmit, + .ndo_set_mac_address = lbs_set_mac_address, + .ndo_set_rx_mode = lbs_set_multicast_list, + .ndo_change_mtu = eth_change_mtu, + .ndo_validate_addr = eth_validate_addr, +}; + +/** + * lbs_add_card - adds the card. It will probe the + * card, allocate the lbs_priv and initialize the device. + * + * @card: A pointer to card + * @dmdev: A pointer to &struct device + * returns: A pointer to &struct lbs_private structure + */ +struct lbs_private *lbs_add_card(void *card, struct device *dmdev) +{ + struct net_device *dev; + struct wireless_dev *wdev; + struct lbs_private *priv = NULL; + + lbs_deb_enter(LBS_DEB_MAIN); + + /* Allocate an Ethernet device and register it */ + wdev = lbs_cfg_alloc(dmdev); + if (IS_ERR(wdev)) { + pr_err("cfg80211 init failed\n"); + goto done; + } + + wdev->iftype = NL80211_IFTYPE_STATION; + priv = wdev_priv(wdev); + priv->wdev = wdev; + + if (lbs_init_adapter(priv)) { + pr_err("failed to initialize adapter structure\n"); + goto err_wdev; + } + + dev = alloc_netdev(0, "wlan%d", NET_NAME_UNKNOWN, ether_setup); + if (!dev) { + dev_err(dmdev, "no memory for network device instance\n"); + goto err_adapter; + } + + dev->ieee80211_ptr = wdev; + dev->ml_priv = priv; + SET_NETDEV_DEV(dev, dmdev); + wdev->netdev = dev; + priv->dev = dev; + + dev->netdev_ops = &lbs_netdev_ops; + dev->watchdog_timeo = 5 * HZ; + dev->ethtool_ops = &lbs_ethtool_ops; + dev->flags |= IFF_BROADCAST | IFF_MULTICAST; + + priv->card = card; + + strcpy(dev->name, "wlan%d"); + + 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_ndev; + } + + priv->work_thread = create_singlethread_workqueue("lbs_worker"); + INIT_WORK(&priv->mcast_work, lbs_set_mcast_worker); + + priv->wol_criteria = EHS_REMOVE_WAKEUP; + priv->wol_gpio = 0xff; + priv->wol_gap = 20; + priv->ehs_remove_supported = true; + + goto done; + + err_ndev: + free_netdev(dev); + + err_adapter: + lbs_free_adapter(priv); + + err_wdev: + lbs_cfg_free(priv); + + 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; + + lbs_deb_enter(LBS_DEB_MAIN); + + lbs_remove_mesh(priv); + + if (priv->wiphy_registered) + lbs_scan_deinit(priv); + + lbs_wait_for_firmware_load(priv); + + /* worker thread destruction blocks on the in-flight command which + * should have been cleared already in lbs_stop_card(). + */ + lbs_deb_main("destroying worker thread\n"); + destroy_workqueue(priv->work_thread); + lbs_deb_main("done destroying worker thread\n"); + + if (priv->psmode == LBS802_11POWERMODEMAX_PSP) { + priv->psmode = LBS802_11POWERMODECAM; + lbs_set_ps_mode(priv, PS_MODE_ACTION_EXIT_PS, true); + } + + if (priv->is_deep_sleep) { + priv->is_deep_sleep = 0; + wake_up_interruptible(&priv->ds_awake_q); + } + + priv->is_host_sleep_configured = 0; + priv->is_host_sleep_activated = 0; + wake_up_interruptible(&priv->host_sleep_q); + + /* Stop the thread servicing the interrupts */ + priv->surpriseremoved = 1; + kthread_stop(priv->main_thread); + + lbs_free_adapter(priv); + lbs_cfg_free(priv); + free_netdev(dev); + + lbs_deb_leave(LBS_DEB_MAIN); +} +EXPORT_SYMBOL_GPL(lbs_remove_card); + + +int lbs_rtap_supported(struct lbs_private *priv) +{ + if (MRVL_FW_MAJOR_REV(priv->fwrelease) == MRVL_FW_V5) + return 1; + + /* newer firmware use a capability mask */ + return ((MRVL_FW_MAJOR_REV(priv->fwrelease) >= MRVL_FW_V10) && + (priv->fwcapinfo & MESH_CAPINFO_ENABLE_MASK)); +} + + +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; + + if (!lbs_disablemesh) + lbs_init_mesh(priv); + else + pr_info("%s: mesh disabled\n", dev->name); + + if (lbs_cfg_register(priv)) { + pr_err("cannot register device\n"); + goto done; + } + + if (lbs_mesh_activated(priv)) + lbs_start_mesh(priv); + + lbs_debugfs_init_one(priv, dev); + + netdev_info(dev, "Marvell WLAN 802.11 adapter\n"); + + 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; + + lbs_deb_enter(LBS_DEB_MAIN); + + if (!priv) + goto out; + dev = priv->dev; + + /* If the netdev isn't registered, it means that lbs_start_card() was + * never called so we have nothing to do here. */ + if (dev->reg_state != NETREG_REGISTERED) + goto out; + + netif_stop_queue(dev); + netif_carrier_off(dev); + + lbs_debugfs_remove_one(priv); + lbs_deinit_mesh(priv); + unregister_netdev(dev); + +out: + lbs_deb_leave(LBS_DEB_MAIN); +} +EXPORT_SYMBOL_GPL(lbs_stop_card); + + +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_in(&priv->event_fifo, (unsigned char *) &event, sizeof(u32)); + + wake_up(&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(&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(PS_MODE_ACTION_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); +} + +module_init(lbs_init_module); +module_exit(lbs_exit_module); + +MODULE_DESCRIPTION("Libertas WLAN Driver Library"); +MODULE_AUTHOR("Marvell International Ltd."); +MODULE_LICENSE("GPL"); |