/*
 * (c) Copyright 2008, RealTEK Technologies Inc. All Rights Reserved.
 *
 * Module: r819xusb_cmdpkt.c
 * (RTL8190 TX/RX command packet handler Source C File)
 *
 * Note: The module is responsible for handling TX and RX command packet.
 * 1.TX: Send set and query configuration command packet.
 * 2.RX: Receive tx feedback, beacon state, query configuration, command packet.
 */
#include "r8192U.h"
#include "r819xU_cmdpkt.h"

bool SendTxCommandPacket(struct net_device *dev, void *pData, u32 DataLen)
{
	bool	rtStatus = true;
	struct r8192_priv   *priv = ieee80211_priv(dev);
	struct sk_buff	    *skb;
	cb_desc		    *tcb_desc;
	unsigned char	    *ptr_buf;

	/* PlatformAcquireSpinLock(Adapter, RT_TX_SPINLOCK); */

	/*
	 * Get TCB and local buffer from common pool.
	 * (It is shared by CmdQ, MgntQ, and USB coalesce DataQ)
	 */
	skb  = dev_alloc_skb(USB_HWDESC_HEADER_LEN + DataLen + 4);
	if (skb == NULL) {
		RT_TRACE(COMP_ERR, "(%s): unable to alloc skb buffer\n",
								__func__);
		rtStatus = false;
		return rtStatus;
	}
	memcpy((unsigned char *)(skb->cb), &dev, sizeof(dev));
	tcb_desc = (cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
	tcb_desc->queue_index = TXCMD_QUEUE;
	tcb_desc->bCmdOrInit = DESC_PACKET_TYPE_NORMAL;
	tcb_desc->bLastIniPkt = 0;
	skb_reserve(skb, USB_HWDESC_HEADER_LEN);
	ptr_buf = skb_put(skb, DataLen);
	memcpy(ptr_buf, pData, DataLen);
	tcb_desc->txbuf_size = (u16)DataLen;

	if (!priv->ieee80211->check_nic_enough_desc(dev, tcb_desc->queue_index) ||
		(!skb_queue_empty(&priv->ieee80211->skb_waitQ[tcb_desc->queue_index])) ||
			(priv->ieee80211->queue_stop)) {
			RT_TRACE(COMP_FIRMWARE, "NULL packet => tx full\n");
			skb_queue_tail(&priv->ieee80211->skb_waitQ[tcb_desc->queue_index], skb);
		} else {
			priv->ieee80211->softmac_hard_start_xmit(skb, dev);
		}

	//PlatformReleaseSpinLock(Adapter, RT_TX_SPINLOCK);
	return rtStatus;
}

/*
 * Function:	cmpk_message_handle_tx()
 *
 * Overview:	Driver internal module can call the API to send message to
 *		firmware side. For example, you can send a debug command packet.
 *		Or you can send a request for FW to modify RLX4181 LBUS HW bank.
 *		Otherwise, you can change MAC/PHT/RF register by firmware at
 *		run time. We do not support message more than one segment now.
 *
 * Input:		NONE
 *
 * Output:		NONE
 *
 * Return:		NONE
 */
 extern	bool	cmpk_message_handle_tx(
	struct net_device *dev,
	u8 *codevirtualaddress,
	u32	packettype,
	u32	buffer_len)
{
	bool rt_status = true;
	return rt_status;
}

/*
 * Function: cmpk_counttxstatistic()
 */
static	void
cmpk_count_txstatistic(struct net_device *dev, cmpk_txfb_t *pstx_fb)
{
	struct r8192_priv *priv = ieee80211_priv(dev);
#ifdef ENABLE_PS
	RT_RF_POWER_STATE rtState;

	pAdapter->HalFunc.GetHwRegHandler(pAdapter,
						HW_VAR_RF_STATE,
						(pu1Byte)(&rtState));

	/*
	 * When RF is off, we should not count the packet for hw/sw synchronize
	 * reason, ie. there may be a duration while sw switch is changed and hw
	 * switch is being changed.
	 */
	if (rtState == eRfOff)
		return;
#endif

#ifdef TODO
	if (pAdapter->bInHctTest)
		return;
#endif
	/*
	 * We can not know the packet length and transmit type:
	 * broadcast or uni or multicast.
	 * So the relative statistics must be collected in tx feedback info
	 */
	if (pstx_fb->tok) {
		priv->stats.txfeedbackok++;
		priv->stats.txoktotal++;
		priv->stats.txokbytestotal += pstx_fb->pkt_length;
		priv->stats.txokinperiod++;
		/* We can not make sure broadcast/multicast or unicast mode. */
		if (pstx_fb->pkt_type == PACKET_MULTICAST) {
			priv->stats.txmulticast++;
			priv->stats.txbytesmulticast += pstx_fb->pkt_length;
		} else if (pstx_fb->pkt_type == PACKET_BROADCAST) {
			priv->stats.txbroadcast++;
			priv->stats.txbytesbroadcast += pstx_fb->pkt_length;
		} else {
			priv->stats.txunicast++;
			priv->stats.txbytesunicast += pstx_fb->pkt_length;
		}
	} else {
		priv->stats.txfeedbackfail++;
		priv->stats.txerrtotal++;
		priv->stats.txerrbytestotal += pstx_fb->pkt_length;
		/* We can not make sure broadcast/multicast or unicast mode. */
		if (pstx_fb->pkt_type == PACKET_MULTICAST)
			priv->stats.txerrmulticast++;
		else if (pstx_fb->pkt_type == PACKET_BROADCAST)
			priv->stats.txerrbroadcast++;
		else
			priv->stats.txerrunicast++;
	}
	priv->stats.txretrycount += pstx_fb->retry_cnt;
	priv->stats.txfeedbackretry += pstx_fb->retry_cnt;
}

/*
 * Function:    cmpk_handle_tx_feedback()
 *
 * Overview:	The function is responsible for extract the message inside TX
 *		feedbck message from firmware. It will contain dedicated info in
 *		ws-06-0063-rtl8190-command-packet-specification. Please
 *		refer to chapter "TX Feedback Element". We have to read 20 bytes
 *		in the command packet.
 *
 * Input:       struct net_device *    dev
 *				u8 *pmsg - Msg Ptr of the command packet.
 *
 * Output:      NONE
 *
 * Return:      NONE
 */
static void cmpk_handle_tx_feedback(struct net_device *dev, u8 *pmsg)
{
	struct r8192_priv *priv = ieee80211_priv(dev);
	cmpk_txfb_t rx_tx_fb;

	priv->stats.txfeedback++;

	/* 1. Extract TX feedback info from RFD to temp structure buffer. */
	memcpy((u8 *)&rx_tx_fb, pmsg, sizeof(cmpk_txfb_t));

	/* 2. Use tx feedback info to count TX statistics. */
	cmpk_count_txstatistic(dev, &rx_tx_fb);
}

void cmdpkt_beacontimerinterrupt_819xusb(struct net_device *dev)
{
	struct r8192_priv *priv = ieee80211_priv(dev);
	u16 tx_rate;

	if (priv->ieee80211->current_network.mode == IEEE_A  ||
		priv->ieee80211->current_network.mode == IEEE_N_5G ||
		(priv->ieee80211->current_network.mode == IEEE_N_24G  &&
		(!priv->ieee80211->pHTInfo->bCurSuppCCK))) {
		tx_rate = 60;
		DMESG("send beacon frame  tx rate is 6Mbpm\n");
	} else {
		tx_rate = 10;
		DMESG("send beacon frame  tx rate is 1Mbpm\n");
	}
	rtl819xusb_beacon_tx(dev, tx_rate); /* HW Beacon */
}

/*
 * Function:    cmpk_handle_interrupt_status()
 *
 * Overview:    The function is responsible for extract the message from
 *		firmware. It will contain dedicated info in
 *		ws-07-0063-v06-rtl819x-command-packet-specification-070315.doc.
 * 		Please refer to chapter "Interrupt Status Element".
 *
 * Input:       struct net_device *dev,
 *			u8* pmsg - Message Pointer of the command packet.
 *
 * Output:      NONE
 *
 * Return:      NONE
 */
static void cmpk_handle_interrupt_status(struct net_device *dev, u8 *pmsg)
{
	cmpk_intr_sta_t		rx_intr_status;	/* */
	struct r8192_priv *priv = ieee80211_priv(dev);

	DMESG("---> cmpk_Handle_Interrupt_Status()\n");

	/* 1. Extract TX feedback info from RFD to temp structure buffer. */
	rx_intr_status.length = pmsg[1];
	if (rx_intr_status.length != (sizeof(cmpk_intr_sta_t) - 2)) {
		DMESG("cmpk_Handle_Interrupt_Status: wrong length!\n");
		return;
	}
	/* Statistics of beacon for ad-hoc mode. */
	if (priv->ieee80211->iw_mode == IW_MODE_ADHOC) {
		//2 maybe need endian transform?
		rx_intr_status.interrupt_status = *((u32 *)(pmsg + 4));
		//rx_intr_status.InterruptStatus = N2H4BYTE(*((UINT32 *)(pMsg + 4)));

		DMESG("interrupt status = 0x%x\n", rx_intr_status.interrupt_status);

		if (rx_intr_status.interrupt_status & ISR_TxBcnOk) {
			priv->ieee80211->bibsscoordinator = true;
			priv->stats.txbeaconokint++;
		} else if (rx_intr_status.interrupt_status & ISR_TxBcnErr) {
			priv->ieee80211->bibsscoordinator = false;
			priv->stats.txbeaconerr++;
		}

		if (rx_intr_status.interrupt_status & ISR_BcnTimerIntr)
			cmdpkt_beacontimerinterrupt_819xusb(dev);
	}
	 /* Other informations in interrupt status we need? */
	DMESG("<---- cmpk_handle_interrupt_status()\n");
}

/*
 * Function:    cmpk_handle_query_config_rx()
 *
 * Overview:    The function is responsible for extract the message from
 *				firmware. It will contain dedicated info in
 *				ws-06-0063-rtl8190-command-packet-specification
 *				Please refer to chapter "Beacon State Element".
 *
 * Input:       u8 *  pmsg	-	Message Pointer of the command packet.
 *
 * Output:      NONE
 *
 * Return:      NONE
 *
 */
static void cmpk_handle_query_config_rx(struct net_device *dev, u8 *pmsg)
{
	cmpk_query_cfg_t rx_query_cfg;
	/*
	 * Extract TX feedback info from RFD to temp structure buffer.
	 */
	rx_query_cfg.cfg_action = (pmsg[4] & 0x80000000) >> 31;
	rx_query_cfg.cfg_type 	= (pmsg[4] & 0x60) >> 5;
	rx_query_cfg.cfg_size 	= (pmsg[4] & 0x18) >> 3;
	rx_query_cfg.cfg_page 	= (pmsg[6] & 0x0F) >> 0;
	rx_query_cfg.cfg_offset = pmsg[7];
	rx_query_cfg.value 	= (pmsg[8] << 24) | (pmsg[9] << 16) |
					(pmsg[10] << 8) | (pmsg[11] << 0);
	rx_query_cfg.mask 	= (pmsg[12] << 24) | (pmsg[13] << 16) |
					(pmsg[14] << 8) | (pmsg[15] << 0);
}

/*
 * Function:	cmpk_count_tx_status()
 *
 * Overview:	Count aggregated tx status from firmware of one type rx command
 *				packet element id = RX_TX_STATUS.
 *
 * Input:		NONE
 *
 * Output:		NONE
 *
 * Return:		NONE
 */
static void cmpk_count_tx_status(struct net_device *dev,
					cmpk_tx_status_t *pstx_status)
{
	struct r8192_priv *priv = ieee80211_priv(dev);

#ifdef ENABLE_PS

	RT_RF_POWER_STATE	rtstate;

	pAdapter->HalFunc.GetHwRegHandler(pAdapter, HW_VAR_RF_STATE, (pu1Byte)(&rtState));

	/*
	 * When RF is off, we should not count the packet for hw/sw synchronize
	 * reason, ie. there may be a duration while sw switch is changed and hw
	 * switch is being changed.
	 */
	if (rtState == eRfOff)
		return;
#endif

	priv->stats.txfeedbackok	+= pstx_status->txok;
	priv->stats.txoktotal		+= pstx_status->txok;

	priv->stats.txfeedbackfail	+= pstx_status->txfail;
	priv->stats.txerrtotal		+= pstx_status->txfail;

	priv->stats.txretrycount	+= pstx_status->txretry;
	priv->stats.txfeedbackretry	+= pstx_status->txretry;

	priv->stats.txmulticast		+= pstx_status->txmcok;
	priv->stats.txbroadcast		+= pstx_status->txbcok;
	priv->stats.txunicast		+= pstx_status->txucok;

	priv->stats.txerrmulticast	+= pstx_status->txmcfail;
	priv->stats.txerrbroadcast	+= pstx_status->txbcfail;
	priv->stats.txerrunicast	+= pstx_status->txucfail;

	priv->stats.txbytesmulticast	+= pstx_status->txmclength;
	priv->stats.txbytesbroadcast	+= pstx_status->txbclength;
	priv->stats.txbytesunicast	+= pstx_status->txuclength;

	priv->stats.last_packet_rate	= pstx_status->rate;
}

/*
 * Function:	cmpk_handle_tx_status()
 *
 * Overview:	Firmware add a new tx feedback status to reduce rx command
 *				packet buffer operation load.
 *
 * Input:		NONE
 *
 * Output:		NONE
 *
 * Return:		NONE
 */
static	void
cmpk_handle_tx_status(struct net_device *dev, u8 *pmsg)
{
	cmpk_tx_status_t rx_tx_sts;

	memcpy((void *)&rx_tx_sts, (void *)pmsg, sizeof(cmpk_tx_status_t));
	/* 2. Use tx feedback info to count TX statistics. */
	cmpk_count_tx_status(dev, &rx_tx_sts);
}

/*
 * Function:	cmpk_handle_tx_rate_history()
 *
 * Overview:	Firmware add a new tx rate history
 *
 * Input:		NONE
 *
 * Output:		NONE
 *
 * Return:		NONE
 */
static void cmpk_handle_tx_rate_history(struct net_device *dev, u8 *pmsg)
{
	cmpk_tx_rahis_t	*ptxrate;
	u8 i, j;
	u16 length = sizeof(cmpk_tx_rahis_t);
	u32 *ptemp;
	struct r8192_priv *priv = ieee80211_priv(dev);

#ifdef ENABLE_PS
	pAdapter->HalFunc.GetHwRegHandler(pAdapter,
						HW_VAR_RF_STATE,
						(pu1Byte)(&rtState));
	/*
	 * When RF is off, we should not count the packet for hw/sw synchronize
	 * reason, ie. there may be a duration while sw switch is changed and hw
	 * switch is being changed.
	 */
	if (rtState == eRfOff)
		return;
#endif
	ptemp = (u32 *)pmsg;

	/*
	 * Do endian transfer to word alignment(16 bits) for windows system.
	 * You must do different endian transfer for linux and MAC OS
	 */
	for (i = 0; i < (length/4); i++) {
		u16 temp1, temp2;
		temp1 = ptemp[i] & 0x0000FFFF;
		temp2 = ptemp[i] >> 16;
		ptemp[i] = (temp1 << 16) | temp2;
	}

	ptxrate = (cmpk_tx_rahis_t *)pmsg;

	if (ptxrate == NULL)
		return;

	for (i = 0; i < 16; i++) {
		/* Collect CCK rate packet num */
		if (i < 4)
			priv->stats.txrate.cck[i] += ptxrate->cck[i];
		/* Collect OFDM rate packet num */
		if (i < 8)
			priv->stats.txrate.ofdm[i] += ptxrate->ofdm[i];
		for (j = 0; j < 4; j++)
			priv->stats.txrate.ht_mcs[j][i] += ptxrate->ht_mcs[j][i];
	}

}

/*
 * Function:    cmpk_message_handle_rx()
 *
 * Overview:    In the function, we will capture different RX command packet
 *		info. Every RX command packet element has different message
 *		length and meaning in content. We only support three type of RX
 *		command packet now. Please refer to document
 *		ws-06-0063-rtl8190-command-packet-specification.
 *
 * Input:       NONE
 *
 * Output:      NONE
 *
 * Return:      NONE
 */
extern	u32
cmpk_message_handle_rx(
	struct net_device *dev,
	struct ieee80211_rx_stats *pstats)
{
	struct r8192_priv *priv = ieee80211_priv(dev);
	int			total_length;
	u8			cmd_length, exe_cnt = 0;
	u8			element_id;
	u8			*pcmd_buff;

	/*
	 * 0. Check input arguments.
	 * If is is a command queue message or pointer is null
	 */
	if ((pstats == NULL))
		return 0;	/* This is not a command packet. */

	/* 1. Read received command packet message length from RFD. */
	total_length = pstats->Length;

	/* 2. Read virtual address from RFD. */
	pcmd_buff = pstats->virtual_address;

	/* 3. Read command pakcet element id and length. */
	element_id = pcmd_buff[0];

	/*
	 * 4. Check every received command packet conent according to different
	 * element type. Because FW may aggregate RX command packet to minimize
	 * transmit time between DRV and FW.
	 */

	/* Add a counter to prevent to locked in the loop too long */
	while (total_length > 0 || exe_cnt++ > 100) {
		/* We support aggregation of different cmd in the same packet */
		element_id = pcmd_buff[0];
		switch (element_id) {
		case RX_TX_FEEDBACK:
			cmpk_handle_tx_feedback(dev, pcmd_buff);
			cmd_length = CMPK_RX_TX_FB_SIZE;
			break;
		case RX_INTERRUPT_STATUS:
			cmpk_handle_interrupt_status(dev, pcmd_buff);
			cmd_length = sizeof(cmpk_intr_sta_t);
			break;
		case BOTH_QUERY_CONFIG:
			cmpk_handle_query_config_rx(dev, pcmd_buff);
			cmd_length = CMPK_BOTH_QUERY_CONFIG_SIZE;
			break;
		case RX_TX_STATUS:
			cmpk_handle_tx_status(dev, pcmd_buff);
			cmd_length = CMPK_RX_TX_STS_SIZE;
			break;
		case RX_TX_PER_PKT_FEEDBACK:
			cmd_length = CMPK_RX_TX_FB_SIZE;
			break;
		case RX_TX_RATE_HISTORY:
			cmpk_handle_tx_rate_history(dev, pcmd_buff);
			cmd_length = CMPK_TX_RAHIS_SIZE;
			break;
		default:
			 RT_TRACE(COMP_ERR, "(%s): unknown CMD Element\n",
								__func__);
			return 1;	/* This is a command packet. */
		}
		priv->stats.rxcmdpkt[element_id]++;
		total_length -= cmd_length;
		pcmd_buff    += cmd_length;
	}
	return 1;	/* This is a command packet. */
}