cmd.c

Go to the documentation of this file.

/*
 * This file contains the handling of command.
 * It prepares command and sends it to firmware when it is ready.
 */

#include <linux/hardirq.h>
#include <linux/kfifo.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/if_arp.h>
#include <linux/export.h>

#include "decl.h"
#include "cfg.h"
#include "cmd.h"

#define CAL_NF(nf)      ((s32)(-(s32)(nf)))
#define CAL_RSSI(snr, nf)   ((s32)((s32)(snr) + CAL_NF(nf)))

int lbs_cmd_copyback(struct lbs_private *priv, unsigned long extra,
             struct cmd_header *resp)
{
    struct cmd_header *buf = (void *)extra;
    uint16_t copy_len;

    copy_len = min(le16_to_cpu(buf->size), le16_to_cpu(resp->size));
    memcpy(buf, resp, copy_len);
    return 0;
}
EXPORT_SYMBOL_GPL(lbs_cmd_copyback);

static int lbs_cmd_async_callback(struct lbs_private *priv, unsigned long extra,
             struct cmd_header *resp)
{
    return 0;
}


static u8 is_command_allowed_in_ps(u16 cmd)
{
    switch (cmd) {
    case CMD_802_11_RSSI:
        return 1;
    case CMD_802_11_HOST_SLEEP_CFG:
        return 1;
    default:
        break;
    }
    return 0;
}

int lbs_update_hw_spec(struct lbs_private *priv)
{
    struct cmd_ds_get_hw_spec cmd;
    int ret = -1;
    u32 i;

    lbs_deb_enter(LBS_DEB_CMD);

    memset(&cmd, 0, sizeof(cmd));
    cmd.hdr.size = cpu_to_le16(sizeof(cmd));
    memcpy(cmd.permanentaddr, priv->current_addr, ETH_ALEN);
    ret = lbs_cmd_with_response(priv, CMD_GET_HW_SPEC, &cmd);
    if (ret)
        goto out;

    priv->fwcapinfo = le32_to_cpu(cmd.fwcapinfo);

    /* The firmware release is in an interesting format: the patch
     * level is in the most significant nibble ... so fix that: */
    priv->fwrelease = le32_to_cpu(cmd.fwrelease);
    priv->fwrelease = (priv->fwrelease << 8) |
        (priv->fwrelease >> 24 & 0xff);

    /* Some firmware capabilities:
     * CF card    firmware 5.0.16p0:   cap 0x00000303
     * USB dongle firmware 5.110.17p2: cap 0x00000303
     */
    netdev_info(priv->dev, "%pM, fw %u.%u.%up%u, cap 0x%08x\n",
        cmd.permanentaddr,
        priv->fwrelease >> 24 & 0xff,
        priv->fwrelease >> 16 & 0xff,
        priv->fwrelease >>  8 & 0xff,
        priv->fwrelease       & 0xff,
        priv->fwcapinfo);
    lbs_deb_cmd("GET_HW_SPEC: hardware interface 0x%x, hardware spec 0x%04x\n",
            cmd.hwifversion, cmd.version);

    /* Clamp region code to 8-bit since FW spec indicates that it should
     * only ever be 8-bit, even though the field size is 16-bit.  Some firmware
     * returns non-zero high 8 bits here.
     *
     * Firmware version 4.0.102 used in CF8381 has region code shifted.  We
     * need to check for this problem and handle it properly.
     */
    if (MRVL_FW_MAJOR_REV(priv->fwrelease) == MRVL_FW_V4)
        priv->regioncode = (le16_to_cpu(cmd.regioncode) >> 8) & 0xFF;
    else
        priv->regioncode = le16_to_cpu(cmd.regioncode) & 0xFF;

    for (i = 0; i < MRVDRV_MAX_REGION_CODE; i++) {
        /* use the region code to search for the index */
        if (priv->regioncode == lbs_region_code_to_index[i])
            break;
    }

    /* if it's unidentified region code, use the default (USA) */
    if (i >= MRVDRV_MAX_REGION_CODE) {
        priv->regioncode = 0x10;
        netdev_info(priv->dev,
                "unidentified region code; using the default (USA)\n");
    }

    if (priv->current_addr[0] == 0xff)
        memmove(priv->current_addr, cmd.permanentaddr, ETH_ALEN);

    if (!priv->copied_hwaddr) {
        memcpy(priv->dev->dev_addr, priv->current_addr, ETH_ALEN);
        if (priv->mesh_dev)
            memcpy(priv->mesh_dev->dev_addr,
                priv->current_addr, ETH_ALEN);
        priv->copied_hwaddr = 1;
    }

out:
    lbs_deb_leave(LBS_DEB_CMD);
    return ret;
}

static int lbs_ret_host_sleep_cfg(struct lbs_private *priv, unsigned long dummy,
            struct cmd_header *resp)
{
    lbs_deb_enter(LBS_DEB_CMD);
    if (priv->is_host_sleep_activated) {
        priv->is_host_sleep_configured = 0;
        if (priv->psstate == PS_STATE_FULL_POWER) {
            priv->is_host_sleep_activated = 0;
            wake_up_interruptible(&priv->host_sleep_q);
        }
    } else {
        priv->is_host_sleep_configured = 1;
    }
    lbs_deb_leave(LBS_DEB_CMD);
    return 0;
}

int lbs_host_sleep_cfg(struct lbs_private *priv, uint32_t criteria,
        struct wol_config *p_wol_config)
{
    struct cmd_ds_host_sleep cmd_config;
    int ret;

    /*
     * Certain firmware versions do not support EHS_REMOVE_WAKEUP command
     * and the card will return a failure.  Since we need to be
     * able to reset the mask, in those cases we set a 0 mask instead.
     */
    if (criteria == EHS_REMOVE_WAKEUP && !priv->ehs_remove_supported)
        criteria = 0;

    cmd_config.hdr.size = cpu_to_le16(sizeof(cmd_config));
    cmd_config.criteria = cpu_to_le32(criteria);
    cmd_config.gpio = priv->wol_gpio;
    cmd_config.gap = priv->wol_gap;

    if (p_wol_config != NULL)
        memcpy((uint8_t *)&cmd_config.wol_conf, (uint8_t *)p_wol_config,
                sizeof(struct wol_config));
    else
        cmd_config.wol_conf.action = CMD_ACT_ACTION_NONE;

    ret = __lbs_cmd(priv, CMD_802_11_HOST_SLEEP_CFG, &cmd_config.hdr,
            le16_to_cpu(cmd_config.hdr.size),
            lbs_ret_host_sleep_cfg, 0);
    if (!ret) {
        if (p_wol_config)
            memcpy((uint8_t *) p_wol_config,
                    (uint8_t *)&cmd_config.wol_conf,
                    sizeof(struct wol_config));
    } else {
        netdev_info(priv->dev, "HOST_SLEEP_CFG failed %d\n", ret);
    }

    return ret;
}
EXPORT_SYMBOL_GPL(lbs_host_sleep_cfg);

int lbs_set_ps_mode(struct lbs_private *priv, u16 cmd_action, bool block)
{
    struct cmd_ds_802_11_ps_mode cmd;
    int ret = 0;

    lbs_deb_enter(LBS_DEB_CMD);

    memset(&cmd, 0, sizeof(cmd));
    cmd.hdr.size = cpu_to_le16(sizeof(cmd));
    cmd.action = cpu_to_le16(cmd_action);

    if (cmd_action == PS_MODE_ACTION_ENTER_PS) {
        lbs_deb_cmd("PS_MODE: action ENTER_PS\n");
        cmd.multipledtim = cpu_to_le16(1);  /* Default DTIM multiple */
    } else if (cmd_action == PS_MODE_ACTION_EXIT_PS) {
        lbs_deb_cmd("PS_MODE: action EXIT_PS\n");
    } else {
        /* We don't handle CONFIRM_SLEEP here because it needs to
         * be fastpathed to the firmware.
         */
        lbs_deb_cmd("PS_MODE: unknown action 0x%X\n", cmd_action);
        ret = -EOPNOTSUPP;
        goto out;
    }

    if (block)
        ret = lbs_cmd_with_response(priv, CMD_802_11_PS_MODE, &cmd);
    else
        lbs_cmd_async(priv, CMD_802_11_PS_MODE, &cmd.hdr, sizeof (cmd));

out:
    lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
    return ret;
}

int lbs_cmd_802_11_sleep_params(struct lbs_private *priv, uint16_t cmd_action,
                struct sleep_params *sp)
{
    struct cmd_ds_802_11_sleep_params cmd;
    int ret;

    lbs_deb_enter(LBS_DEB_CMD);

    if (cmd_action == CMD_ACT_GET) {
        memset(&cmd, 0, sizeof(cmd));
    } else {
        cmd.error = cpu_to_le16(sp->sp_error);
        cmd.offset = cpu_to_le16(sp->sp_offset);
        cmd.stabletime = cpu_to_le16(sp->sp_stabletime);
        cmd.calcontrol = sp->sp_calcontrol;
        cmd.externalsleepclk = sp->sp_extsleepclk;
        cmd.reserved = cpu_to_le16(sp->sp_reserved);
    }
    cmd.hdr.size = cpu_to_le16(sizeof(cmd));
    cmd.action = cpu_to_le16(cmd_action);

    ret = lbs_cmd_with_response(priv, CMD_802_11_SLEEP_PARAMS, &cmd);

    if (!ret) {
        lbs_deb_cmd("error 0x%x, offset 0x%x, stabletime 0x%x, "
                "calcontrol 0x%x extsleepclk 0x%x\n",
                le16_to_cpu(cmd.error), le16_to_cpu(cmd.offset),
                le16_to_cpu(cmd.stabletime), cmd.calcontrol,
                cmd.externalsleepclk);

        sp->sp_error = le16_to_cpu(cmd.error);
        sp->sp_offset = le16_to_cpu(cmd.offset);
        sp->sp_stabletime = le16_to_cpu(cmd.stabletime);
        sp->sp_calcontrol = cmd.calcontrol;
        sp->sp_extsleepclk = cmd.externalsleepclk;
        sp->sp_reserved = le16_to_cpu(cmd.reserved);
    }

    lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
    return 0;
}

static int lbs_wait_for_ds_awake(struct lbs_private *priv)
{
    int ret = 0;

    lbs_deb_enter(LBS_DEB_CMD);

    if (priv->is_deep_sleep) {
        if (!wait_event_interruptible_timeout(priv->ds_awake_q,
                    !priv->is_deep_sleep, (10 * HZ))) {
            netdev_err(priv->dev, "ds_awake_q: timer expired\n");
            ret = -1;
        }
    }

    lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
    return ret;
}

int lbs_set_deep_sleep(struct lbs_private *priv, int deep_sleep)
{
    int ret =  0;

    lbs_deb_enter(LBS_DEB_CMD);

    if (deep_sleep) {
        if (priv->is_deep_sleep != 1) {
            lbs_deb_cmd("deep sleep: sleep\n");
            BUG_ON(!priv->enter_deep_sleep);
            ret = priv->enter_deep_sleep(priv);
            if (!ret) {
                netif_stop_queue(priv->dev);
                netif_carrier_off(priv->dev);
            }
        } else {
            netdev_err(priv->dev, "deep sleep: already enabled\n");
        }
    } else {
        if (priv->is_deep_sleep) {
            lbs_deb_cmd("deep sleep: wakeup\n");
            BUG_ON(!priv->exit_deep_sleep);
            ret = priv->exit_deep_sleep(priv);
            if (!ret) {
                ret = lbs_wait_for_ds_awake(priv);
                if (ret)
                    netdev_err(priv->dev,
                           "deep sleep: wakeup failed\n");
            }
        }
    }

    lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
    return ret;
}

static int lbs_ret_host_sleep_activate(struct lbs_private *priv,
        unsigned long dummy,
        struct cmd_header *cmd)
{
    lbs_deb_enter(LBS_DEB_FW);
    priv->is_host_sleep_activated = 1;
    wake_up_interruptible(&priv->host_sleep_q);
    lbs_deb_leave(LBS_DEB_FW);
    return 0;
}

int lbs_set_host_sleep(struct lbs_private *priv, int host_sleep)
{
    struct cmd_header cmd;
    int ret = 0;
    uint32_t criteria = EHS_REMOVE_WAKEUP;

    lbs_deb_enter(LBS_DEB_CMD);

    if (host_sleep) {
        if (priv->is_host_sleep_activated != 1) {
            memset(&cmd, 0, sizeof(cmd));
            ret = lbs_host_sleep_cfg(priv, priv->wol_criteria,
                    (struct wol_config *)NULL);
            if (ret) {
                netdev_info(priv->dev,
                        "Host sleep configuration failed: %d\n",
                        ret);
                return ret;
            }
            if (priv->psstate == PS_STATE_FULL_POWER) {
                ret = __lbs_cmd(priv,
                        CMD_802_11_HOST_SLEEP_ACTIVATE,
                        &cmd,
                        sizeof(cmd),
                        lbs_ret_host_sleep_activate, 0);
                if (ret)
                    netdev_info(priv->dev,
                            "HOST_SLEEP_ACTIVATE failed: %d\n",
                            ret);
            }

            if (!wait_event_interruptible_timeout(
                        priv->host_sleep_q,
                        priv->is_host_sleep_activated,
                        (10 * HZ))) {
                netdev_err(priv->dev,
                       "host_sleep_q: timer expired\n");
                ret = -1;
            }
        } else {
            netdev_err(priv->dev, "host sleep: already enabled\n");
        }
    } else {
        if (priv->is_host_sleep_activated)
            ret = lbs_host_sleep_cfg(priv, criteria,
                    (struct wol_config *)NULL);
    }

    return ret;
}

int lbs_set_snmp_mib(struct lbs_private *priv, u32 oid, u16 val)
{
    struct cmd_ds_802_11_snmp_mib cmd;
    int ret;

    lbs_deb_enter(LBS_DEB_CMD);

    memset(&cmd, 0, sizeof (cmd));
    cmd.hdr.size = cpu_to_le16(sizeof(cmd));
    cmd.action = cpu_to_le16(CMD_ACT_SET);
    cmd.oid = cpu_to_le16((u16) oid);

    switch (oid) {
    case SNMP_MIB_OID_BSS_TYPE:
        cmd.bufsize = cpu_to_le16(sizeof(u8));
        cmd.value[0] = val;
        break;
    case SNMP_MIB_OID_11D_ENABLE:
    case SNMP_MIB_OID_FRAG_THRESHOLD:
    case SNMP_MIB_OID_RTS_THRESHOLD:
    case SNMP_MIB_OID_SHORT_RETRY_LIMIT:
    case SNMP_MIB_OID_LONG_RETRY_LIMIT:
        cmd.bufsize = cpu_to_le16(sizeof(u16));
        *((__le16 *)(&cmd.value)) = cpu_to_le16(val);
        break;
    default:
        lbs_deb_cmd("SNMP_CMD: (set) unhandled OID 0x%x\n", oid);
        ret = -EINVAL;
        goto out;
    }

    lbs_deb_cmd("SNMP_CMD: (set) oid 0x%x, oid size 0x%x, value 0x%x\n",
            le16_to_cpu(cmd.oid), le16_to_cpu(cmd.bufsize), val);

    ret = lbs_cmd_with_response(priv, CMD_802_11_SNMP_MIB, &cmd);

out:
    lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
    return ret;
}

int lbs_get_snmp_mib(struct lbs_private *priv, u32 oid, u16 *out_val)
{
    struct cmd_ds_802_11_snmp_mib cmd;
    int ret;

    lbs_deb_enter(LBS_DEB_CMD);

    memset(&cmd, 0, sizeof (cmd));
    cmd.hdr.size = cpu_to_le16(sizeof(cmd));
    cmd.action = cpu_to_le16(CMD_ACT_GET);
    cmd.oid = cpu_to_le16(oid);

    ret = lbs_cmd_with_response(priv, CMD_802_11_SNMP_MIB, &cmd);
    if (ret)
        goto out;

    switch (le16_to_cpu(cmd.bufsize)) {
    case sizeof(u8):
        *out_val = cmd.value[0];
        break;
    case sizeof(u16):
        *out_val = le16_to_cpu(*((__le16 *)(&cmd.value)));
        break;
    default:
        lbs_deb_cmd("SNMP_CMD: (get) unhandled OID 0x%x size %d\n",
                    oid, le16_to_cpu(cmd.bufsize));
        break;
    }

out:
    lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
    return ret;
}

int lbs_get_tx_power(struct lbs_private *priv, s16 *curlevel, s16 *minlevel,
             s16 *maxlevel)
{
    struct cmd_ds_802_11_rf_tx_power cmd;
    int ret;

    lbs_deb_enter(LBS_DEB_CMD);

    memset(&cmd, 0, sizeof(cmd));
    cmd.hdr.size = cpu_to_le16(sizeof(cmd));
    cmd.action = cpu_to_le16(CMD_ACT_GET);

    ret = lbs_cmd_with_response(priv, CMD_802_11_RF_TX_POWER, &cmd);
    if (ret == 0) {
        *curlevel = le16_to_cpu(cmd.curlevel);
        if (minlevel)
            *minlevel = cmd.minlevel;
        if (maxlevel)
            *maxlevel = cmd.maxlevel;
    }

    lbs_deb_leave(LBS_DEB_CMD);
    return ret;
}

int lbs_set_tx_power(struct lbs_private *priv, s16 dbm)
{
    struct cmd_ds_802_11_rf_tx_power cmd;
    int ret;

    lbs_deb_enter(LBS_DEB_CMD);

    memset(&cmd, 0, sizeof(cmd));
    cmd.hdr.size = cpu_to_le16(sizeof(cmd));
    cmd.action = cpu_to_le16(CMD_ACT_SET);
    cmd.curlevel = cpu_to_le16(dbm);

    lbs_deb_cmd("SET_RF_TX_POWER: %d dBm\n", dbm);

    ret = lbs_cmd_with_response(priv, CMD_802_11_RF_TX_POWER, &cmd);

    lbs_deb_leave(LBS_DEB_CMD);
    return ret;
}

int lbs_set_monitor_mode(struct lbs_private *priv, int enable)
{
    struct cmd_ds_802_11_monitor_mode cmd;
    int ret;

    memset(&cmd, 0, sizeof(cmd));
    cmd.hdr.size = cpu_to_le16(sizeof(cmd));
    cmd.action = cpu_to_le16(CMD_ACT_SET);
    if (enable)
        cmd.mode = cpu_to_le16(0x1);

    lbs_deb_cmd("SET_MONITOR_MODE: %d\n", enable);

    ret = lbs_cmd_with_response(priv, CMD_802_11_MONITOR_MODE, &cmd);
    if (ret == 0) {
        priv->dev->type = enable ? ARPHRD_IEEE80211_RADIOTAP :
                        ARPHRD_ETHER;
    }

    lbs_deb_leave(LBS_DEB_CMD);
    return ret;
}

static int lbs_get_channel(struct lbs_private *priv)
{
    struct cmd_ds_802_11_rf_channel cmd;
    int ret = 0;

    lbs_deb_enter(LBS_DEB_CMD);

    memset(&cmd, 0, sizeof(cmd));
    cmd.hdr.size = cpu_to_le16(sizeof(cmd));
    cmd.action = cpu_to_le16(CMD_OPT_802_11_RF_CHANNEL_GET);

    ret = lbs_cmd_with_response(priv, CMD_802_11_RF_CHANNEL, &cmd);
    if (ret)
        goto out;

    ret = le16_to_cpu(cmd.channel);
    lbs_deb_cmd("current radio channel is %d\n", ret);

out:
    lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
    return ret;
}

int lbs_update_channel(struct lbs_private *priv)
{
    int ret;

    /* the channel in f/w could be out of sync; get the current channel */
    lbs_deb_enter(LBS_DEB_ASSOC);

    ret = lbs_get_channel(priv);
    if (ret > 0) {
        priv->channel = ret;
        ret = 0;
    }
    lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
    return ret;
}

int lbs_set_channel(struct lbs_private *priv, u8 channel)
{
    struct cmd_ds_802_11_rf_channel cmd;
#ifdef DEBUG
    u8 old_channel = priv->channel;
#endif
    int ret = 0;

    lbs_deb_enter(LBS_DEB_CMD);

    memset(&cmd, 0, sizeof(cmd));
    cmd.hdr.size = cpu_to_le16(sizeof(cmd));
    cmd.action = cpu_to_le16(CMD_OPT_802_11_RF_CHANNEL_SET);
    cmd.channel = cpu_to_le16(channel);

    ret = lbs_cmd_with_response(priv, CMD_802_11_RF_CHANNEL, &cmd);
    if (ret)
        goto out;

    priv->channel = (uint8_t) le16_to_cpu(cmd.channel);
    lbs_deb_cmd("channel switch from %d to %d\n", old_channel,
        priv->channel);

out:
    lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
    return ret;
}

int lbs_get_rssi(struct lbs_private *priv, s8 *rssi, s8 *nf)
{
    struct cmd_ds_802_11_rssi cmd;
    int ret = 0;

    lbs_deb_enter(LBS_DEB_CMD);

    BUG_ON(rssi == NULL);
    BUG_ON(nf == NULL);

    memset(&cmd, 0, sizeof(cmd));
    cmd.hdr.size = cpu_to_le16(sizeof(cmd));
    /* Average SNR over last 8 beacons */
    cmd.n_or_snr = cpu_to_le16(8);

    ret = lbs_cmd_with_response(priv, CMD_802_11_RSSI, &cmd);
    if (ret == 0) {
        *nf = CAL_NF(le16_to_cpu(cmd.nf));
        *rssi = CAL_RSSI(le16_to_cpu(cmd.n_or_snr), le16_to_cpu(cmd.nf));
    }

    lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
    return ret;
}

int lbs_set_11d_domain_info(struct lbs_private *priv)
{
    struct wiphy *wiphy = priv->wdev->wiphy;
    struct ieee80211_supported_band **bands = wiphy->bands;
    struct cmd_ds_802_11d_domain_info cmd;
    struct mrvl_ie_domain_param_set *domain = &cmd.domain;
    struct ieee80211_country_ie_triplet *t;
    enum ieee80211_band band;
    struct ieee80211_channel *ch;
    u8 num_triplet = 0;
    u8 num_parsed_chan = 0;
    u8 first_channel = 0, next_chan = 0, max_pwr = 0;
    u8 i, flag = 0;
    size_t triplet_size;
    int ret = 0;

    lbs_deb_enter(LBS_DEB_11D);
    if (!priv->country_code[0])
        goto out;

    memset(&cmd, 0, sizeof(cmd));
    cmd.action = cpu_to_le16(CMD_ACT_SET);

    lbs_deb_11d("Setting country code '%c%c'\n",
            priv->country_code[0], priv->country_code[1]);

    domain->header.type = cpu_to_le16(TLV_TYPE_DOMAIN);

    /* Set country code */
    domain->country_code[0] = priv->country_code[0];
    domain->country_code[1] = priv->country_code[1];
    domain->country_code[2] = ' ';

    /* Now set up the channel triplets; firmware is somewhat picky here
     * and doesn't validate channel numbers and spans; hence it would
     * interpret a triplet of (36, 4, 20) as channels 36, 37, 38, 39.  Since
     * the last 3 aren't valid channels, the driver is responsible for
     * splitting that up into 4 triplet pairs of (36, 1, 20) + (40, 1, 20)
     * etc.
     */
    for (band = 0;
         (band < IEEE80211_NUM_BANDS) && (num_triplet < MAX_11D_TRIPLETS);
         band++) {

        if (!bands[band])
            continue;

        for (i = 0;
             (i < bands[band]->n_channels) && (num_triplet < MAX_11D_TRIPLETS);
             i++) {
            ch = &bands[band]->channels[i];
            if (ch->flags & IEEE80211_CHAN_DISABLED)
                continue;

            if (!flag) {
                flag = 1;
                next_chan = first_channel = (u32) ch->hw_value;
                max_pwr = ch->max_power;
                num_parsed_chan = 1;
                continue;
            }

            if ((ch->hw_value == next_chan + 1) &&
                    (ch->max_power == max_pwr)) {
                /* Consolidate adjacent channels */
                next_chan++;
                num_parsed_chan++;
            } else {
                /* Add this triplet */
                lbs_deb_11d("11D triplet (%d, %d, %d)\n",
                    first_channel, num_parsed_chan,
                    max_pwr);
                t = &domain->triplet[num_triplet];
                t->chans.first_channel = first_channel;
                t->chans.num_channels = num_parsed_chan;
                t->chans.max_power = max_pwr;
                num_triplet++;
                flag = 0;
            }
        }

        if (flag) {
            /* Add last triplet */
            lbs_deb_11d("11D triplet (%d, %d, %d)\n", first_channel,
                num_parsed_chan, max_pwr);
            t = &domain->triplet[num_triplet];
            t->chans.first_channel = first_channel;
            t->chans.num_channels = num_parsed_chan;
            t->chans.max_power = max_pwr;
            num_triplet++;
        }
    }

    lbs_deb_11d("# triplets %d\n", num_triplet);

    /* Set command header sizes */
    triplet_size = num_triplet * sizeof(struct ieee80211_country_ie_triplet);
    domain->header.len = cpu_to_le16(sizeof(domain->country_code) +
                    triplet_size);

    lbs_deb_hex(LBS_DEB_11D, "802.11D domain param set",
            (u8 *) &cmd.domain.country_code,
            le16_to_cpu(domain->header.len));

    cmd.hdr.size = cpu_to_le16(sizeof(cmd.hdr) +
                   sizeof(cmd.action) +
                   sizeof(cmd.domain.header) +
                   sizeof(cmd.domain.country_code) +
                   triplet_size);

    ret = lbs_cmd_with_response(priv, CMD_802_11D_DOMAIN_INFO, &cmd);

out:
    lbs_deb_leave_args(LBS_DEB_11D, "ret %d", ret);
    return ret;
}

int lbs_get_reg(struct lbs_private *priv, u16 reg, u16 offset, u32 *value)
{
    struct cmd_ds_reg_access cmd;
    int ret = 0;

    lbs_deb_enter(LBS_DEB_CMD);

    BUG_ON(value == NULL);

    memset(&cmd, 0, sizeof(cmd));
    cmd.hdr.size = cpu_to_le16(sizeof(cmd));
    cmd.action = cpu_to_le16(CMD_ACT_GET);
    cmd.offset = cpu_to_le16(offset);

    if (reg != CMD_MAC_REG_ACCESS &&
        reg != CMD_BBP_REG_ACCESS &&
        reg != CMD_RF_REG_ACCESS) {
        ret = -EINVAL;
        goto out;
    }

    ret = lbs_cmd_with_response(priv, reg, &cmd);
    if (!ret) {
        if (reg == CMD_BBP_REG_ACCESS || reg == CMD_RF_REG_ACCESS)
            *value = cmd.value.bbp_rf;
        else if (reg == CMD_MAC_REG_ACCESS)
            *value = le32_to_cpu(cmd.value.mac);
    }

out:
    lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
    return ret;
}

int lbs_set_reg(struct lbs_private *priv, u16 reg, u16 offset, u32 value)
{
    struct cmd_ds_reg_access cmd;
    int ret = 0;

    lbs_deb_enter(LBS_DEB_CMD);

    memset(&cmd, 0, sizeof(cmd));
    cmd.hdr.size = cpu_to_le16(sizeof(cmd));
    cmd.action = cpu_to_le16(CMD_ACT_SET);
    cmd.offset = cpu_to_le16(offset);

    if (reg == CMD_BBP_REG_ACCESS || reg == CMD_RF_REG_ACCESS)
        cmd.value.bbp_rf = (u8) (value & 0xFF);
    else if (reg == CMD_MAC_REG_ACCESS)
        cmd.value.mac = cpu_to_le32(value);
    else {
        ret = -EINVAL;
        goto out;
    }

    ret = lbs_cmd_with_response(priv, reg, &cmd);

out:
    lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
    return ret;
}

static void lbs_queue_cmd(struct lbs_private *priv,
              struct cmd_ctrl_node *cmdnode)
{
    unsigned long flags;
    int addtail = 1;

    lbs_deb_enter(LBS_DEB_HOST);

    if (!cmdnode) {
        lbs_deb_host("QUEUE_CMD: cmdnode is NULL\n");
        goto done;
    }
    if (!cmdnode->cmdbuf->size) {
        lbs_deb_host("DNLD_CMD: cmd size is zero\n");
        goto done;
    }
    cmdnode->result = 0;

    /* Exit_PS command needs to be queued in the header always. */
    if (le16_to_cpu(cmdnode->cmdbuf->command) == CMD_802_11_PS_MODE) {
        struct cmd_ds_802_11_ps_mode *psm = (void *) &cmdnode->cmdbuf;

        if (psm->action == cpu_to_le16(PS_MODE_ACTION_EXIT_PS)) {
            if (priv->psstate != PS_STATE_FULL_POWER)
                addtail = 0;
        }
    }

    if (le16_to_cpu(cmdnode->cmdbuf->command) == CMD_802_11_WAKEUP_CONFIRM)
        addtail = 0;

    spin_lock_irqsave(&priv->driver_lock, flags);

    if (addtail)
        list_add_tail(&cmdnode->list, &priv->cmdpendingq);
    else
        list_add(&cmdnode->list, &priv->cmdpendingq);

    spin_unlock_irqrestore(&priv->driver_lock, flags);

    lbs_deb_host("QUEUE_CMD: inserted command 0x%04x into cmdpendingq\n",
             le16_to_cpu(cmdnode->cmdbuf->command));

done:
    lbs_deb_leave(LBS_DEB_HOST);
}

static void lbs_submit_command(struct lbs_private *priv,
                   struct cmd_ctrl_node *cmdnode)
{
    unsigned long flags;
    struct cmd_header *cmd;
    uint16_t cmdsize;
    uint16_t command;
    int timeo = 3 * HZ;
    int ret;

    lbs_deb_enter(LBS_DEB_HOST);

    cmd = cmdnode->cmdbuf;

    spin_lock_irqsave(&priv->driver_lock, flags);
    priv->seqnum++;
    cmd->seqnum = cpu_to_le16(priv->seqnum);
    priv->cur_cmd = cmdnode;
    spin_unlock_irqrestore(&priv->driver_lock, flags);

    cmdsize = le16_to_cpu(cmd->size);
    command = le16_to_cpu(cmd->command);

    /* These commands take longer */
    if (command == CMD_802_11_SCAN || command == CMD_802_11_ASSOCIATE)
        timeo = 5 * HZ;

    lbs_deb_cmd("DNLD_CMD: command 0x%04x, seq %d, size %d\n",
             command, le16_to_cpu(cmd->seqnum), cmdsize);
    lbs_deb_hex(LBS_DEB_CMD, "DNLD_CMD", (void *) cmdnode->cmdbuf, cmdsize);

    ret = priv->hw_host_to_card(priv, MVMS_CMD, (u8 *) cmd, cmdsize);

    if (ret) {
        netdev_info(priv->dev, "DNLD_CMD: hw_host_to_card failed: %d\n",
                ret);
        /* Reset dnld state machine, report failure */
        priv->dnld_sent = DNLD_RES_RECEIVED;
        lbs_complete_command(priv, cmdnode, ret);
    }

    if (command == CMD_802_11_DEEP_SLEEP) {
        if (priv->is_auto_deep_sleep_enabled) {
            priv->wakeup_dev_required = 1;
            priv->dnld_sent = 0;
        }
        priv->is_deep_sleep = 1;
        lbs_complete_command(priv, cmdnode, 0);
    } else {
        /* Setup the timer after transmit command */
        mod_timer(&priv->command_timer, jiffies + timeo);
    }

    lbs_deb_leave(LBS_DEB_HOST);
}

/*
 *  This function inserts command node to cmdfreeq
 *  after cleans it. Requires priv->driver_lock held.
 */
static void __lbs_cleanup_and_insert_cmd(struct lbs_private *priv,
                     struct cmd_ctrl_node *cmdnode)
{
    lbs_deb_enter(LBS_DEB_HOST);

    if (!cmdnode)
        goto out;

    cmdnode->callback = NULL;
    cmdnode->callback_arg = 0;

    memset(cmdnode->cmdbuf, 0, LBS_CMD_BUFFER_SIZE);

    list_add_tail(&cmdnode->list, &priv->cmdfreeq);
 out:
    lbs_deb_leave(LBS_DEB_HOST);
}

static void lbs_cleanup_and_insert_cmd(struct lbs_private *priv,
    struct cmd_ctrl_node *ptempcmd)
{
    unsigned long flags;

    spin_lock_irqsave(&priv->driver_lock, flags);
    __lbs_cleanup_and_insert_cmd(priv, ptempcmd);
    spin_unlock_irqrestore(&priv->driver_lock, flags);
}

void __lbs_complete_command(struct lbs_private *priv, struct cmd_ctrl_node *cmd,
                int result)
{
    /*
     * Normally, commands are removed from cmdpendingq before being
     * submitted. However, we can arrive here on alternative codepaths
     * where the command is still pending. Make sure the command really
     * isn't part of a list at this point.
     */
    list_del_init(&cmd->list);

    cmd->result = result;
    cmd->cmdwaitqwoken = 1;
    wake_up(&cmd->cmdwait_q);

    if (!cmd->callback || cmd->callback == lbs_cmd_async_callback)
        __lbs_cleanup_and_insert_cmd(priv, cmd);
    priv->cur_cmd = NULL;
    wake_up(&priv->waitq);
}

void lbs_complete_command(struct lbs_private *priv, struct cmd_ctrl_node *cmd,
              int result)
{
    unsigned long flags;
    spin_lock_irqsave(&priv->driver_lock, flags);
    __lbs_complete_command(priv, cmd, result);
    spin_unlock_irqrestore(&priv->driver_lock, flags);
}

int lbs_set_radio(struct lbs_private *priv, u8 preamble, u8 radio_on)
{
    struct cmd_ds_802_11_radio_control cmd;
    int ret = -EINVAL;

    lbs_deb_enter(LBS_DEB_CMD);

    cmd.hdr.size = cpu_to_le16(sizeof(cmd));
    cmd.action = cpu_to_le16(CMD_ACT_SET);

    /* Only v8 and below support setting the preamble */
    if (priv->fwrelease < 0x09000000) {
        switch (preamble) {
        case RADIO_PREAMBLE_SHORT:
        case RADIO_PREAMBLE_AUTO:
        case RADIO_PREAMBLE_LONG:
            cmd.control = cpu_to_le16(preamble);
            break;
        default:
            goto out;
        }
    }

    if (radio_on)
        cmd.control |= cpu_to_le16(0x1);
    else {
        cmd.control &= cpu_to_le16(~0x1);
        priv->txpower_cur = 0;
    }

    lbs_deb_cmd("RADIO_CONTROL: radio %s, preamble %d\n",
            radio_on ? "ON" : "OFF", preamble);

    priv->radio_on = radio_on;

    ret = lbs_cmd_with_response(priv, CMD_802_11_RADIO_CONTROL, &cmd);

out:
    lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
    return ret;
}

void lbs_set_mac_control(struct lbs_private *priv)
{
    struct cmd_ds_mac_control cmd;

    lbs_deb_enter(LBS_DEB_CMD);

    cmd.hdr.size = cpu_to_le16(sizeof(cmd));
    cmd.action = cpu_to_le16(priv->mac_control);
    cmd.reserved = 0;

    lbs_cmd_async(priv, CMD_MAC_CONTROL, &cmd.hdr, sizeof(cmd));

    lbs_deb_leave(LBS_DEB_CMD);
}

int lbs_set_mac_control_sync(struct lbs_private *priv)
{
    struct cmd_ds_mac_control cmd;
    int ret = 0;

    lbs_deb_enter(LBS_DEB_CMD);

    cmd.hdr.size = cpu_to_le16(sizeof(cmd));
    cmd.action = cpu_to_le16(priv->mac_control);
    cmd.reserved = 0;
    ret = lbs_cmd_with_response(priv, CMD_MAC_CONTROL, &cmd);

    lbs_deb_leave(LBS_DEB_CMD);
    return ret;
}

int lbs_allocate_cmd_buffer(struct lbs_private *priv)
{
    int ret = 0;
    u32 bufsize;
    u32 i;
    struct cmd_ctrl_node *cmdarray;

    lbs_deb_enter(LBS_DEB_HOST);

    /* Allocate and initialize the command array */
    bufsize = sizeof(struct cmd_ctrl_node) * LBS_NUM_CMD_BUFFERS;
    if (!(cmdarray = kzalloc(bufsize, GFP_KERNEL))) {
        lbs_deb_host("ALLOC_CMD_BUF: tempcmd_array is NULL\n");
        ret = -1;
        goto done;
    }
    priv->cmd_array = cmdarray;

    /* Allocate and initialize each command buffer in the command array */
    for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
        cmdarray[i].cmdbuf = kzalloc(LBS_CMD_BUFFER_SIZE, GFP_KERNEL);
        if (!cmdarray[i].cmdbuf) {
            lbs_deb_host("ALLOC_CMD_BUF: ptempvirtualaddr is NULL\n");
            ret = -1;
            goto done;
        }
    }

    for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
        init_waitqueue_head(&cmdarray[i].cmdwait_q);
        lbs_cleanup_and_insert_cmd(priv, &cmdarray[i]);
    }
    ret = 0;

done:
    lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
    return ret;
}

int lbs_free_cmd_buffer(struct lbs_private *priv)
{
    struct cmd_ctrl_node *cmdarray;
    unsigned int i;

    lbs_deb_enter(LBS_DEB_HOST);

    /* need to check if cmd array is allocated or not */
    if (priv->cmd_array == NULL) {
        lbs_deb_host("FREE_CMD_BUF: cmd_array is NULL\n");
        goto done;
    }

    cmdarray = priv->cmd_array;

    /* Release shared memory buffers */
    for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
        if (cmdarray[i].cmdbuf) {
            kfree(cmdarray[i].cmdbuf);
            cmdarray[i].cmdbuf = NULL;
        }
    }

    /* Release cmd_ctrl_node */
    if (priv->cmd_array) {
        kfree(priv->cmd_array);
        priv->cmd_array = NULL;
    }

done:
    lbs_deb_leave(LBS_DEB_HOST);
    return 0;
}

static struct cmd_ctrl_node *lbs_get_free_cmd_node(struct lbs_private *priv)
{
    struct cmd_ctrl_node *tempnode;
    unsigned long flags;

    lbs_deb_enter(LBS_DEB_HOST);

    if (!priv)
        return NULL;

    spin_lock_irqsave(&priv->driver_lock, flags);

    if (!list_empty(&priv->cmdfreeq)) {
        tempnode = list_first_entry(&priv->cmdfreeq,
                        struct cmd_ctrl_node, list);
        list_del_init(&tempnode->list);
    } else {
        lbs_deb_host("GET_CMD_NODE: cmd_ctrl_node is not available\n");
        tempnode = NULL;
    }

    spin_unlock_irqrestore(&priv->driver_lock, flags);

    lbs_deb_leave(LBS_DEB_HOST);
    return tempnode;
}

int lbs_execute_next_command(struct lbs_private *priv)
{
    struct cmd_ctrl_node *cmdnode = NULL;
    struct cmd_header *cmd;
    unsigned long flags;
    int ret = 0;

    /* Debug group is LBS_DEB_THREAD and not LBS_DEB_HOST, because the
     * only caller to us is lbs_thread() and we get even when a
     * data packet is received */
    lbs_deb_enter(LBS_DEB_THREAD);

    spin_lock_irqsave(&priv->driver_lock, flags);

    if (priv->cur_cmd) {
        netdev_alert(priv->dev,
                 "EXEC_NEXT_CMD: already processing command!\n");
        spin_unlock_irqrestore(&priv->driver_lock, flags);
        ret = -1;
        goto done;
    }

    if (!list_empty(&priv->cmdpendingq)) {
        cmdnode = list_first_entry(&priv->cmdpendingq,
                       struct cmd_ctrl_node, list);
    }

    spin_unlock_irqrestore(&priv->driver_lock, flags);

    if (cmdnode) {
        cmd = cmdnode->cmdbuf;

        if (is_command_allowed_in_ps(le16_to_cpu(cmd->command))) {
            if ((priv->psstate == PS_STATE_SLEEP) ||
                (priv->psstate == PS_STATE_PRE_SLEEP)) {
                lbs_deb_host(
                       "EXEC_NEXT_CMD: cannot send cmd 0x%04x in psstate %d\n",
                       le16_to_cpu(cmd->command),
                       priv->psstate);
                ret = -1;
                goto done;
            }
            lbs_deb_host("EXEC_NEXT_CMD: OK to send command "
                     "0x%04x in psstate %d\n",
                     le16_to_cpu(cmd->command), priv->psstate);
        } else if (priv->psstate != PS_STATE_FULL_POWER) {
            /*
             * 1. Non-PS command:
             * Queue it. set needtowakeup to TRUE if current state
             * is SLEEP, otherwise call send EXIT_PS.
             * 2. PS command but not EXIT_PS:
             * Ignore it.
             * 3. PS command EXIT_PS:
             * Set needtowakeup to TRUE if current state is SLEEP,
             * otherwise send this command down to firmware
             * immediately.
             */
            if (cmd->command != cpu_to_le16(CMD_802_11_PS_MODE)) {
                /*  Prepare to send Exit PS,
                 *  this non PS command will be sent later */
                if ((priv->psstate == PS_STATE_SLEEP)
                    || (priv->psstate == PS_STATE_PRE_SLEEP)
                    ) {
                    /* w/ new scheme, it will not reach here.
                       since it is blocked in main_thread. */
                    priv->needtowakeup = 1;
                } else {
                    lbs_set_ps_mode(priv,
                            PS_MODE_ACTION_EXIT_PS,
                            false);
                }

                ret = 0;
                goto done;
            } else {
                /*
                 * PS command. Ignore it if it is not Exit_PS.
                 * otherwise send it down immediately.
                 */
                struct cmd_ds_802_11_ps_mode *psm = (void *)&cmd[1];

                lbs_deb_host(
                       "EXEC_NEXT_CMD: PS cmd, action 0x%02x\n",
                       psm->action);
                if (psm->action !=
                    cpu_to_le16(PS_MODE_ACTION_EXIT_PS)) {
                    lbs_deb_host(
                           "EXEC_NEXT_CMD: ignore ENTER_PS cmd\n");
                    lbs_complete_command(priv, cmdnode, 0);

                    ret = 0;
                    goto done;
                }

                if ((priv->psstate == PS_STATE_SLEEP) ||
                    (priv->psstate == PS_STATE_PRE_SLEEP)) {
                    lbs_deb_host(
                           "EXEC_NEXT_CMD: ignore EXIT_PS cmd in sleep\n");
                    lbs_complete_command(priv, cmdnode, 0);
                    priv->needtowakeup = 1;

                    ret = 0;
                    goto done;
                }

                lbs_deb_host(
                       "EXEC_NEXT_CMD: sending EXIT_PS\n");
            }
        }
        spin_lock_irqsave(&priv->driver_lock, flags);
        list_del_init(&cmdnode->list);
        spin_unlock_irqrestore(&priv->driver_lock, flags);
        lbs_deb_host("EXEC_NEXT_CMD: sending command 0x%04x\n",
                le16_to_cpu(cmd->command));
        lbs_submit_command(priv, cmdnode);
    } else {
        /*
         * check if in power save mode, if yes, put the device back
         * to PS mode
         */
#ifdef TODO
        /*
         * This was the old code for libertas+wext. Someone that
         * understands this beast should re-code it in a sane way.
         *
         * I actually don't understand why this is related to WPA
         * and to connection status, shouldn't powering should be
         * independ of such things?
         */
        if ((priv->psmode != LBS802_11POWERMODECAM) &&
            (priv->psstate == PS_STATE_FULL_POWER) &&
            ((priv->connect_status == LBS_CONNECTED) ||
            lbs_mesh_connected(priv))) {
            if (priv->secinfo.WPAenabled ||
                priv->secinfo.WPA2enabled) {
                /* check for valid WPA group keys */
                if (priv->wpa_mcast_key.len ||
                    priv->wpa_unicast_key.len) {
                    lbs_deb_host(
                           "EXEC_NEXT_CMD: WPA enabled and GTK_SET"
                           " go back to PS_SLEEP");
                    lbs_set_ps_mode(priv,
                            PS_MODE_ACTION_ENTER_PS,
                            false);
                }
            } else {
                lbs_deb_host(
                       "EXEC_NEXT_CMD: cmdpendingq empty, "
                       "go back to PS_SLEEP");
                lbs_set_ps_mode(priv, PS_MODE_ACTION_ENTER_PS,
                        false);
            }
        }
#endif
    }

    ret = 0;
done:
    lbs_deb_leave(LBS_DEB_THREAD);
    return ret;
}

static void lbs_send_confirmsleep(struct lbs_private *priv)
{
    unsigned long flags;
    int ret;

    lbs_deb_enter(LBS_DEB_HOST);
    lbs_deb_hex(LBS_DEB_HOST, "sleep confirm", (u8 *) &confirm_sleep,
        sizeof(confirm_sleep));

    ret = priv->hw_host_to_card(priv, MVMS_CMD, (u8 *) &confirm_sleep,
        sizeof(confirm_sleep));
    if (ret) {
        netdev_alert(priv->dev, "confirm_sleep failed\n");
        goto out;
    }

    spin_lock_irqsave(&priv->driver_lock, flags);

    /* We don't get a response on the sleep-confirmation */
    priv->dnld_sent = DNLD_RES_RECEIVED;

    if (priv->is_host_sleep_configured) {
        priv->is_host_sleep_activated = 1;
        wake_up_interruptible(&priv->host_sleep_q);
    }

    /* If nothing to do, go back to sleep (?) */
    if (!kfifo_len(&priv->event_fifo) && !priv->resp_len[priv->resp_idx])
        priv->psstate = PS_STATE_SLEEP;

    spin_unlock_irqrestore(&priv->driver_lock, flags);

out:
    lbs_deb_leave(LBS_DEB_HOST);
}

void lbs_ps_confirm_sleep(struct lbs_private *priv)
{
    unsigned long flags =0;
    int allowed = 1;

    lbs_deb_enter(LBS_DEB_HOST);

    spin_lock_irqsave(&priv->driver_lock, flags);
    if (priv->dnld_sent) {
        allowed = 0;
        lbs_deb_host("dnld_sent was set\n");
    }

    /* In-progress command? */
    if (priv->cur_cmd) {
        allowed = 0;
        lbs_deb_host("cur_cmd was set\n");
    }

    /* Pending events or command responses? */
    if (kfifo_len(&priv->event_fifo) || priv->resp_len[priv->resp_idx]) {
        allowed = 0;
        lbs_deb_host("pending events or command responses\n");
    }
    spin_unlock_irqrestore(&priv->driver_lock, flags);

    if (allowed) {
        lbs_deb_host("sending lbs_ps_confirm_sleep\n");
        lbs_send_confirmsleep(priv);
    } else {
        lbs_deb_host("sleep confirm has been delayed\n");
    }

    lbs_deb_leave(LBS_DEB_HOST);
}


int lbs_set_tpc_cfg(struct lbs_private *priv, int enable, int8_t p0, int8_t p1,
        int8_t p2, int usesnr)
{
    struct cmd_ds_802_11_tpc_cfg cmd;
    int ret;

    memset(&cmd, 0, sizeof(cmd));
    cmd.hdr.size = cpu_to_le16(sizeof(cmd));
    cmd.action = cpu_to_le16(CMD_ACT_SET);
    cmd.enable = !!enable;
    cmd.usesnr = !!usesnr;
    cmd.P0 = p0;
    cmd.P1 = p1;
    cmd.P2 = p2;

    ret = lbs_cmd_with_response(priv, CMD_802_11_TPC_CFG, &cmd);

    return ret;
}

int lbs_set_power_adapt_cfg(struct lbs_private *priv, int enable, int8_t p0,
        int8_t p1, int8_t p2)
{
    struct cmd_ds_802_11_pa_cfg cmd;
    int ret;

    memset(&cmd, 0, sizeof(cmd));
    cmd.hdr.size = cpu_to_le16(sizeof(cmd));
    cmd.action = cpu_to_le16(CMD_ACT_SET);
    cmd.enable = !!enable;
    cmd.P0 = p0;
    cmd.P1 = p1;
    cmd.P2 = p2;

    ret = lbs_cmd_with_response(priv, CMD_802_11_PA_CFG , &cmd);

    return ret;
}


struct cmd_ctrl_node *__lbs_cmd_async(struct lbs_private *priv,
    uint16_t command, struct cmd_header *in_cmd, int in_cmd_size,
    int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),
    unsigned long callback_arg)
{
    struct cmd_ctrl_node *cmdnode;

    lbs_deb_enter(LBS_DEB_HOST);

    if (priv->surpriseremoved) {
        lbs_deb_host("PREP_CMD: card removed\n");
        cmdnode = ERR_PTR(-ENOENT);
        goto done;
    }

    /* No commands are allowed in Deep Sleep until we toggle the GPIO
     * to wake up the card and it has signaled that it's ready.
     */
    if (!priv->is_auto_deep_sleep_enabled) {
        if (priv->is_deep_sleep) {
            lbs_deb_cmd("command not allowed in deep sleep\n");
            cmdnode = ERR_PTR(-EBUSY);
            goto done;
        }
    }

    cmdnode = lbs_get_free_cmd_node(priv);
    if (cmdnode == NULL) {
        lbs_deb_host("PREP_CMD: cmdnode is NULL\n");

        /* Wake up main thread to execute next command */
        wake_up(&priv->waitq);
        cmdnode = ERR_PTR(-ENOBUFS);
        goto done;
    }

    cmdnode->callback = callback;
    cmdnode->callback_arg = callback_arg;

    /* Copy the incoming command to the buffer */
    memcpy(cmdnode->cmdbuf, in_cmd, in_cmd_size);

    /* Set command, clean result, move to buffer */
    cmdnode->cmdbuf->command = cpu_to_le16(command);
    cmdnode->cmdbuf->size    = cpu_to_le16(in_cmd_size);
    cmdnode->cmdbuf->result  = 0;

    lbs_deb_host("PREP_CMD: command 0x%04x\n", command);

    cmdnode->cmdwaitqwoken = 0;
    lbs_queue_cmd(priv, cmdnode);
    wake_up(&priv->waitq);

 done:
    lbs_deb_leave_args(LBS_DEB_HOST, "ret %p", cmdnode);
    return cmdnode;
}

void lbs_cmd_async(struct lbs_private *priv, uint16_t command,
    struct cmd_header *in_cmd, int in_cmd_size)
{
    lbs_deb_enter(LBS_DEB_CMD);
    __lbs_cmd_async(priv, command, in_cmd, in_cmd_size,
        lbs_cmd_async_callback, 0);
    lbs_deb_leave(LBS_DEB_CMD);
}

int __lbs_cmd(struct lbs_private *priv, uint16_t command,
          struct cmd_header *in_cmd, int in_cmd_size,
          int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),
          unsigned long callback_arg)
{
    struct cmd_ctrl_node *cmdnode;
    unsigned long flags;
    int ret = 0;

    lbs_deb_enter(LBS_DEB_HOST);

    cmdnode = __lbs_cmd_async(priv, command, in_cmd, in_cmd_size,
                  callback, callback_arg);
    if (IS_ERR(cmdnode)) {
        ret = PTR_ERR(cmdnode);
        goto done;
    }

    might_sleep();

    /*
     * Be careful with signals here. A signal may be received as the system
     * goes into suspend or resume. We do not want this to interrupt the
     * command, so we perform an uninterruptible sleep.
     */
    wait_event(cmdnode->cmdwait_q, cmdnode->cmdwaitqwoken);

    spin_lock_irqsave(&priv->driver_lock, flags);
    ret = cmdnode->result;
    if (ret)
        netdev_info(priv->dev, "PREP_CMD: command 0x%04x failed: %d\n",
                command, ret);

    __lbs_cleanup_and_insert_cmd(priv, cmdnode);
    spin_unlock_irqrestore(&priv->driver_lock, flags);

done:
    lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
    return ret;
}
EXPORT_SYMBOL_GPL(__lbs_cmd);