text: /**
    * This file contains the handling of command.
    * It prepares command and sends it to firmware when it is ready.
    */
  
  #include <linux/kfifo.h>
  #include <linux/sched.h>
  #include <linux/slab.h>
  
  #include "host.h"
  #include "decl.h"
  #include "defs.h"
  #include "dev.h"
  #include "assoc.h"
  #include "wext.h"
  #include "scan.h"
  #include "cmd.h"
  
  
  static struct cmd_ctrl_node *lbs_get_cmd_ctrl_node(struct lbs_private *priv);
  
  /**
   *  @brief Simple callback that copies response back into command
   *
   *  @param priv    	A pointer to struct lbs_private structure
   *  @param extra  	A pointer to the original command structure for which
   *                      'resp' is a response
   *  @param resp         A pointer to the command response
   *
   *  @return 	   	0 on success, error on failure
   */
  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);
  
  /**
   *  @brief Simple callback that ignores the result. Use this if
   *  you just want to send a command to the hardware, but don't
   *  care for the result.
   *
   *  @param priv         ignored
   *  @param extra        ignored
   *  @param resp         ignored
   *
   *  @return 	   	0 for success
   */
  static int lbs_cmd_async_callback(struct lbs_private *priv, unsigned long extra,
  		     struct cmd_header *resp)
  {
  	return 0;
  }
  
  
  /**
   *  @brief Checks whether a command is allowed in Power Save mode
   *
   *  @param command the command ID
   *  @return 	   1 if allowed, 0 if not allowed
   */
  static u8 is_command_allowed_in_ps(u16 cmd)
  {
  	switch (cmd) {
  	case CMD_802_11_RSSI:
  		return 1;
  	default:
  		break;
  	}
  	return 0;
  }
  
  /**
   *  @brief This function checks if the command is allowed.
   *
   *  @param priv         A pointer to lbs_private structure
   *  @return             allowed or not allowed.
   */
  
  static int lbs_is_cmd_allowed(struct lbs_private *priv)
  {
  	int ret = 1;
  
  	lbs_deb_enter(LBS_DEB_CMD);
  
  	if (!priv->is_auto_deep_sleep_enabled) {
  		if (priv->is_deep_sleep) {
  			lbs_deb_cmd("command not allowed in deep sleep\n");
  			ret = 0;
  		}
  	}
  
  	lbs_deb_leave(LBS_DEB_CMD);
  	return ret;
  }
  
  /**
   *  @brief Updates the hardware details like MAC address and regulatory region
   *
   *  @param priv    	A pointer to struct lbs_private structure
   *
   *  @return 	   	0 on success, error on failure
   */
  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
  	 */
  	lbs_pr_info("%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;
  		lbs_pr_info("unidentified region code; using the default (USA)\n");
  	}
  
  	if (priv->current_addr[0] == 0xff)
  		memmove(priv->current_addr, cmd.permanentaddr, ETH_ALEN);
  
  	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);
  
  	if (lbs_set_regiontable(priv, priv->regioncode, 0)) {
  		ret = -1;
  		goto out;
  	}
  
  out:
  	lbs_deb_leave(LBS_DEB_CMD);
  	return ret;
  }
  
  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;
  
  	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_with_response(priv, CMD_802_11_HOST_SLEEP_CFG, &cmd_config);
  	if (!ret) {
  		if (criteria) {
  			lbs_deb_cmd("Set WOL criteria to %x\n", criteria);
  			priv->wol_criteria = criteria;
  		} else
  			memcpy((uint8_t *) p_wol_config,
  					(uint8_t *)&cmd_config.wol_conf,
  					sizeof(struct wol_config));
  	} else {
  		lbs_pr_info("HOST_SLEEP_CFG failed %d\n", ret);
  	}
  
  	return ret;
  }
  EXPORT_SYMBOL_GPL(lbs_host_sleep_cfg);
  
  static int lbs_cmd_802_11_ps_mode(struct cmd_ds_command *cmd,
  				   u16 cmd_action)
  {
  	struct cmd_ds_802_11_ps_mode *psm = &cmd->params.psmode;
  
  	lbs_deb_enter(LBS_DEB_CMD);
  
  	cmd->command = cpu_to_le16(CMD_802_11_PS_MODE);
  	cmd->size = cpu_to_le16(sizeof(struct cmd_ds_802_11_ps_mode) +
  				sizeof(struct cmd_header));
  	psm->action = cpu_to_le16(cmd_action);
  	psm->multipledtim = 0;
  	switch (cmd_action) {
  	case CMD_SUBCMD_ENTER_PS:
  		lbs_deb_cmd("PS command:" "SubCode- Enter PS\n");
  
  		psm->locallisteninterval = 0;
  		psm->nullpktinterval = 0;
  		psm->multipledtim =
  		    cpu_to_le16(MRVDRV_DEFAULT_MULTIPLE_DTIM);
  		break;
  
  	case CMD_SUBCMD_EXIT_PS:
  		lbs_deb_cmd("PS command:" "SubCode- Exit PS\n");
  		break;
  
  	case CMD_SUBCMD_SLEEP_CONFIRMED:
  		lbs_deb_cmd("PS command: SubCode- sleep confirm\n");
  		break;
  
  	default:
  		break;
  	}
  
  	lbs_deb_leave(LBS_DEB_CMD);
  	return 0;
  }
  
  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))) {
  			lbs_pr_err("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 {
  			lbs_pr_err("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)
  					lbs_pr_err("deep sleep: wakeup"
  							"failed\n");
  			}
  		}
  	}
  
  	lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
  	return ret;
  }
  
  /**
   *  @brief Set an SNMP MIB value
   *
   *  @param priv    	A pointer to struct lbs_private structure
   *  @param oid  	The OID to set in the firmware
   *  @param val  	Value to set the OID to
   *
   *  @return 	   	0 on success, error on failure
   */
  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;
  }
  
  /**
   *  @brief Get an SNMP MIB value
   *
   *  @param priv    	A pointer to struct lbs_private structure
   *  @param oid  	The OID to retrieve from the firmware
   *  @param out_val  	Location for the returned value
   *
   *  @return 	   	0 on success, error on failure
   */
  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;
  }
  
  /**
   *  @brief Get the min, max, and current TX power
   *
   *  @param priv    	A pointer to struct lbs_private structure
   *  @param curlevel  	Current power level in dBm
   *  @param minlevel  	Minimum supported power level in dBm (optional)
   *  @param maxlevel  	Maximum supported power level in dBm (optional)
   *
   *  @return 	   	0 on success, error on failure
   */
  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;
  }
  
  /**
   *  @brief Set the TX power
   *
   *  @param priv    	A pointer to struct lbs_private structure
   *  @param dbm  	The desired power level in dBm
   *
   *  @return 	   	0 on success, error on failure
   */
  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;
  }
  
  static int lbs_cmd_802_11_monitor_mode(struct cmd_ds_command *cmd,
  				      u16 cmd_action, void *pdata_buf)
  {
  	struct cmd_ds_802_11_monitor_mode *monitor = &cmd->params.monitor;
  
  	cmd->command = cpu_to_le16(CMD_802_11_MONITOR_MODE);
  	cmd->size =
  	    cpu_to_le16(sizeof(struct cmd_ds_802_11_monitor_mode) +
  			     sizeof(struct cmd_header));
  
  	monitor->action = cpu_to_le16(cmd_action);
  	if (cmd_action == CMD_ACT_SET) {
  		monitor->mode =
  		    cpu_to_le16((u16) (*(u32 *) pdata_buf));
  	}
  
  	return 0;
  }
  
  /**
   *  @brief Get the radio channel
   *
   *  @param priv    	A pointer to struct lbs_private structure
   *
   *  @return 	   	The channel on success, error on failure
   */
  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;
  }
  
  /**
   *  @brief Set the radio channel
   *
   *  @param priv    	A pointer to struct lbs_private structure
   *  @param channel  	The desired channel, or 0 to clear a locked channel
   *
   *  @return 	   	0 on success, error on failure
   */
  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;
  }
  
  static int lbs_cmd_reg_access(struct cmd_ds_command *cmdptr,
  			       u8 cmd_action, void *pdata_buf)
  {
  	struct lbs_offset_value *offval;
  
  	lbs_deb_enter(LBS_DEB_CMD);
  
  	offval = (struct lbs_offset_value *)pdata_buf;
  
  	switch (le16_to_cpu(cmdptr->command)) {
  	case CMD_MAC_REG_ACCESS:
  		{
  			struct cmd_ds_mac_reg_access *macreg;
  
  			cmdptr->size =
  			    cpu_to_le16(sizeof (struct cmd_ds_mac_reg_access)
  					+ sizeof(struct cmd_header));
  			macreg =
  			    (struct cmd_ds_mac_reg_access *)&cmdptr->params.
  			    macreg;
  
  			macreg->action = cpu_to_le16(cmd_action);
  			macreg->offset = cpu_to_le16((u16) offval->offset);
  			macreg->value = cpu_to_le32(offval->value);
  
  			break;
  		}
  
  	case CMD_BBP_REG_ACCESS:
  		{
  			struct cmd_ds_bbp_reg_access *bbpreg;
  
  			cmdptr->size =
  			    cpu_to_le16(sizeof
  					     (struct cmd_ds_bbp_reg_access)
  					     + sizeof(struct cmd_header));
  			bbpreg =
  			    (struct cmd_ds_bbp_reg_access *)&cmdptr->params.
  			    bbpreg;
  
  			bbpreg->action = cpu_to_le16(cmd_action);
  			bbpreg->offset = cpu_to_le16((u16) offval->offset);
  			bbpreg->value = (u8) offval->value;
  
  			break;
  		}
  
  	case CMD_RF_REG_ACCESS:
  		{
  			struct cmd_ds_rf_reg_access *rfreg;
  
  			cmdptr->size =
  			    cpu_to_le16(sizeof
  					     (struct cmd_ds_rf_reg_access) +
  					     sizeof(struct cmd_header));
  			rfreg =
  			    (struct cmd_ds_rf_reg_access *)&cmdptr->params.
  			    rfreg;
  
  			rfreg->action = cpu_to_le16(cmd_action);
  			rfreg->offset = cpu_to_le16((u16) offval->offset);
  			rfreg->value = (u8) offval->value;
  
  			break;
  		}
  
  	default:
  		break;
  	}
  
  	lbs_deb_leave(LBS_DEB_CMD);
  	return 0;
  }
  
  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[1];
  
  		if (psm->action == cpu_to_le16(CMD_SUBCMD_EXIT_PS)) {
  			if (priv->psstate != PS_STATE_FULL_POWER)
  				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->cur_cmd = cmdnode;
  	priv->cur_cmd_retcode = 0;
  	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) {
  		lbs_pr_info("DNLD_CMD: hw_host_to_card failed: %d\n", ret);
  		/* Let the timer kick in and retry, and potentially reset
  		   the whole thing if the condition persists */
  		timeo = HZ/4;
  	}
  
  	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)
  {
  	if (cmd == priv->cur_cmd)
  		priv->cur_cmd_retcode = result;
  
  	cmd->result = result;
  	cmd->cmdwaitqwoken = 1;
  	wake_up_interruptible(&cmd->cmdwait_q);
  
  	if (!cmd->callback || cmd->callback == lbs_cmd_async_callback)
  		__lbs_cleanup_and_insert_cmd(priv, cmd);
  	priv->cur_cmd = NULL;
  }
  
  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);
  }
  
  /**
   *  @brief This function prepare the command before send to firmware.
   *
   *  @param priv		A pointer to struct lbs_private structure
   *  @param cmd_no	command number
   *  @param cmd_action	command action: GET or SET
   *  @param wait_option	wait option: wait response or not
   *  @param cmd_oid	cmd oid: treated as sub command
   *  @param pdata_buf	A pointer to informaion buffer
   *  @return 		0 or -1
   */
  int lbs_prepare_and_send_command(struct lbs_private *priv,
  			  u16 cmd_no,
  			  u16 cmd_action,
  			  u16 wait_option, u32 cmd_oid, void *pdata_buf)
  {
  	int ret = 0;
  	struct cmd_ctrl_node *cmdnode;
  	struct cmd_ds_command *cmdptr;
  	unsigned long flags;
  
  	lbs_deb_enter(LBS_DEB_HOST);
  
  	if (!priv) {
  		lbs_deb_host("PREP_CMD: priv is NULL\n");
  		ret = -1;
  		goto done;
  	}
  
  	if (priv->surpriseremoved) {
  		lbs_deb_host("PREP_CMD: card removed\n");
  		ret = -1;
  		goto done;
  	}
  
  	if (!lbs_is_cmd_allowed(priv)) {
  		ret = -EBUSY;
  		goto done;
  	}
  
  	cmdnode = lbs_get_cmd_ctrl_node(priv);
  
  	if (cmdnode == NULL) {
  		lbs_deb_host("PREP_CMD: cmdnode is NULL\n");
  
  		/* Wake up main thread to execute next command */
  		wake_up_interruptible(&priv->waitq);
  		ret = -1;
  		goto done;
  	}
  
  	cmdnode->callback = NULL;
  	cmdnode->callback_arg = (unsigned long)pdata_buf;
  
  	cmdptr = (struct cmd_ds_command *)cmdnode->cmdbuf;
  
  	lbs_deb_host("PREP_CMD: command 0x%04x\n", cmd_no);
  
  	/* Set sequence number, command and INT option */
  	priv->seqnum++;
  	cmdptr->seqnum = cpu_to_le16(priv->seqnum);
  
  	cmdptr->command = cpu_to_le16(cmd_no);
  	cmdptr->result = 0;
  
  	switch (cmd_no) {
  	case CMD_802_11_PS_MODE:
  		ret = lbs_cmd_802_11_ps_mode(cmdptr, cmd_action);
  		break;
  
  	case CMD_MAC_REG_ACCESS:
  	case CMD_BBP_REG_ACCESS:
  	case CMD_RF_REG_ACCESS:
  		ret = lbs_cmd_reg_access(cmdptr, cmd_action, pdata_buf);
  		break;
  
  	case CMD_802_11_MONITOR_MODE:
  		ret = lbs_cmd_802_11_monitor_mode(cmdptr,
  				          cmd_action, pdata_buf);
  		break;
  
  	case CMD_802_11_RSSI:
  		ret = lbs_cmd_802_11_rssi(priv, cmdptr);
  		break;
  
  	case CMD_802_11_SET_AFC:
  	case CMD_802_11_GET_AFC:
  
  		cmdptr->command = cpu_to_le16(cmd_no);
  		cmdptr->size = cpu_to_le16(sizeof(struct cmd_ds_802_11_afc) +
  					   sizeof(struct cmd_header));
  
  		memmove(&cmdptr->params.afc,
  			pdata_buf, sizeof(struct cmd_ds_802_11_afc));
  
  		ret = 0;
  		goto done;
  
  	case CMD_802_11_TPC_CFG:
  		cmdptr->command = cpu_to_le16(CMD_802_11_TPC_CFG);
  		cmdptr->size =
  		    cpu_to_le16(sizeof(struct cmd_ds_802_11_tpc_cfg) +
  				     sizeof(struct cmd_header));
  
  		memmove(&cmdptr->params.tpccfg,
  			pdata_buf, sizeof(struct cmd_ds_802_11_tpc_cfg));
  
  		ret = 0;
  		break;
  
  #ifdef CONFIG_LIBERTAS_MESH
  
  	case CMD_BT_ACCESS:
  		ret = lbs_cmd_bt_access(cmdptr, cmd_action, pdata_buf);
  		break;
  
  	case CMD_FWT_ACCESS:
  		ret = lbs_cmd_fwt_access(cmdptr, cmd_action, pdata_buf);
  		break;
  
  #endif
  
  	case CMD_802_11_BEACON_CTRL:
  		ret = lbs_cmd_bcn_ctrl(priv, cmdptr, cmd_action);
  		break;
  	case CMD_802_11_DEEP_SLEEP:
  		cmdptr->command = cpu_to_le16(CMD_802_11_DEEP_SLEEP);
  		cmdptr->size = cpu_to_le16(sizeof(struct cmd_header));
  		break;
  	default:
  		lbs_pr_err("PREP_CMD: unknown command 0x%04x\n", cmd_no);
  		ret = -1;
  		break;
  	}
  
  	/* return error, since the command preparation failed */
  	if (ret != 0) {
  		lbs_deb_host("PREP_CMD: command preparation failed\n");
  		lbs_cleanup_and_insert_cmd(priv, cmdnode);
  		ret = -1;
  		goto done;
  	}
  
  	cmdnode->cmdwaitqwoken = 0;
  
  	lbs_queue_cmd(priv, cmdnode);
  	wake_up_interruptible(&priv->waitq);
  
  	if (wait_option & CMD_OPTION_WAITFORRSP) {
  		lbs_deb_host("PREP_CMD: wait for response\n");
  		might_sleep();
  		wait_event_interruptible(cmdnode->cmdwait_q,
  					 cmdnode->cmdwaitqwoken);
  	}
  
  	spin_lock_irqsave(&priv->driver_lock, flags);
  	if (priv->cur_cmd_retcode) {
  		lbs_deb_host("PREP_CMD: command failed with return code %d\n",
  		       priv->cur_cmd_retcode);
  		priv->cur_cmd_retcode = 0;
  		ret = -1;
  	}
  	spin_unlock_irqrestore(&priv->driver_lock, flags);
  
  done:
  	lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
  	return ret;
  }
  
  /**
   *  @brief This function allocates the command buffer and link
   *  it to command free queue.
   *
   *  @param priv		A pointer to struct lbs_private structure
   *  @return 		0 or -1
   */
  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;
  }
  
  /**
   *  @brief This function frees the command buffer.
   *
   *  @param priv		A pointer to struct lbs_private structure
   *  @return 		0 or -1
   */
  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;
  }
  
  /**
   *  @brief This function gets a free command node if available in
   *  command free queue.
   *
   *  @param priv		A pointer to struct lbs_private structure
   *  @return cmd_ctrl_node A pointer to cmd_ctrl_node structure or NULL
   */
  static struct cmd_ctrl_node *lbs_get_cmd_ctrl_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(&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;
  }
  
  /**
   *  @brief This function executes next command in command
   *  pending queue. It will put firmware back to PS mode
   *  if applicable.
   *
   *  @param priv     A pointer to struct lbs_private structure
   *  @return 	   0 or -1
   */
  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) {
  		lbs_pr_alert( "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 lbs_ps_wakeup to 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_ps_wakeup(priv, 0);
  
  				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(CMD_SUBCMD_EXIT_PS)) {
  					lbs_deb_host(
  					       "EXEC_NEXT_CMD: ignore ENTER_PS cmd\n");
  					list_del(&cmdnode->list);
  					spin_lock_irqsave(&priv->driver_lock, flags);
  					lbs_complete_command(priv, cmdnode, 0);
  					spin_unlock_irqrestore(&priv->driver_lock, flags);
  
  					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");
  					list_del(&cmdnode->list);
  					spin_lock_irqsave(&priv->driver_lock, flags);
  					lbs_complete_command(priv, cmdnode, 0);
  					spin_unlock_irqrestore(&priv->driver_lock, flags);
  					priv->needtowakeup = 1;
  
  					ret = 0;
  					goto done;
  				}
  
  				lbs_deb_host(
  				       "EXEC_NEXT_CMD: sending EXIT_PS\n");
  			}
  		}
  		list_del(&cmdnode->list);
  		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
  		 */
  		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_ps_sleep(priv, 0);
  				}
  			} else {
  				lbs_deb_host(
  				       "EXEC_NEXT_CMD: cmdpendingq empty, "
  				       "go back to PS_SLEEP");
  				lbs_ps_sleep(priv, 0);
  			}
  		}
  	}
  
  	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) {
  		lbs_pr_alert("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 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_sleep(struct lbs_private *priv, int wait_option)
  {
  	lbs_deb_enter(LBS_DEB_HOST);
  
  	/*
  	 * PS is currently supported only in Infrastructure mode
  	 * Remove this check if it is to be supported in IBSS mode also
  	 */
  
  	lbs_prepare_and_send_command(priv, CMD_802_11_PS_MODE,
  			      CMD_SUBCMD_ENTER_PS, wait_option, 0, NULL);
  
  	lbs_deb_leave(LBS_DEB_HOST);
  }
  
  /**
   *  @brief This function sends Exit_PS command to firmware.
   *
   *  @param priv    	A pointer to struct lbs_private structure
   *  @param wait_option	wait response or not
   *  @return 	   	n/a
   */
  void lbs_ps_wakeup(struct lbs_private *priv, int wait_option)
  {
  	__le32 Localpsmode;
  
  	lbs_deb_enter(LBS_DEB_HOST);
  
  	Localpsmode = cpu_to_le32(LBS802_11POWERMODECAM);
  
  	lbs_prepare_and_send_command(priv, CMD_802_11_PS_MODE,
  			      CMD_SUBCMD_EXIT_PS,
  			      wait_option, 0, &Localpsmode);
  
  	lbs_deb_leave(LBS_DEB_HOST);
  }
  
  /**
   *  @brief This function checks condition and prepares to
   *  send sleep confirm command to firmware if ok.
   *
   *  @param priv    	A pointer to struct lbs_private structure
   *  @param psmode  	Power Saving mode
   *  @return 	   	n/a
   */
  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);
  }
  
  
  /**
   * @brief Configures the transmission power control functionality.
   *
   * @param priv		A pointer to struct lbs_private structure
   * @param enable	Transmission power control enable
   * @param p0		Power level when link quality is good (dBm).
   * @param p1		Power level when link quality is fair (dBm).
   * @param p2		Power level when link quality is poor (dBm).
   * @param usesnr	Use Signal to Noise Ratio in TPC
   *
   * @return 0 on success
   */
  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;
  }
  
  /**
   * @brief Configures the power adaptation settings.
   *
   * @param priv		A pointer to struct lbs_private structure
   * @param enable	Power adaptation enable
   * @param p0		Power level for 1, 2, 5.5 and 11 Mbps (dBm).
   * @param p1		Power level for 6, 9, 12, 18, 22, 24 and 36 Mbps (dBm).
   * @param p2		Power level for 48 and 54 Mbps (dBm).
   *
   * @return 0 on Success
   */
  
  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;
  	}
  
  	if (!lbs_is_cmd_allowed(priv)) {
  		cmdnode = ERR_PTR(-EBUSY);
  		goto done;
  	}
  
  	cmdnode = lbs_get_cmd_ctrl_node(priv);
  	if (cmdnode == NULL) {
  		lbs_deb_host("PREP_CMD: cmdnode is NULL\n");
  
  		/* Wake up main thread to execute next command */
  		wake_up_interruptible(&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 sequence number, clean result, move to buffer */
  	priv->seqnum++;
  	cmdnode->cmdbuf->command = cpu_to_le16(command);
  	cmdnode->cmdbuf->size    = cpu_to_le16(in_cmd_size);
  	cmdnode->cmdbuf->seqnum  = cpu_to_le16(priv->seqnum);
  	cmdnode->cmdbuf->result  = 0;
  
  	lbs_deb_host("PREP_CMD: command 0x%04x\n", command);
  
  	cmdnode->cmdwaitqwoken = 0;
  	lbs_queue_cmd(priv, cmdnode);
  	wake_up_interruptible(&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();
  	wait_event_interruptible(cmdnode->cmdwait_q, cmdnode->cmdwaitqwoken);
  
  	spin_lock_irqsave(&priv->driver_lock, flags);
  	ret = cmdnode->result;
  	if (ret)
  		lbs_pr_info("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);
  