static void cc2520_lpl_tx_done(u8 status)
{
if (lpl_enabled) {
spin_lock_irqsave(&state_sl, flags);
if (cc2520_packet_requires_ack_wait(cur_tx_buf)) {
if (status == CC2520_TX_SUCCESS) {
lpl_state = CC2520_LPL_IDLE;
spin_unlock_irqrestore(&state_sl, flags);
hrtimer_cancel(&lpl_timer);
lpl_top->tx_done(status);
}
else if (lpl_state == CC2520_LPL_TIMER_EXPIRED) {
lpl_state = CC2520_LPL_IDLE;
spin_unlock_irqrestore(&state_sl, flags);
lpl_top->tx_done(-CC2520_TX_FAILED);
}
else {
spin_unlock_irqrestore(&state_sl, flags);
DBG((KERN_INFO "[cc2520] - lpl retransmit.\n"));
lpl_bottom->tx(cur_tx_buf, cur_tx_len);
}
}
else {
if (lpl_state == CC2520_LPL_TIMER_EXPIRED) {
lpl_state = CC2520_LPL_IDLE;
spin_unlock_irqrestore(&state_sl, flags);
lpl_top->tx_done(CC2520_TX_SUCCESS);
}
else {
spin_unlock_irqrestore(&state_sl, flags);
lpl_bottom->tx(cur_tx_buf, cur_tx_len);
}
}
}
else {
lpl_top->tx_done(status);
}
// if packet requires ack, examine status.
// if success terminate LPL window
// else if status != TIMER_EXPIRED resend
// else resend
}
static void cc2520_sack_tx_done(u8 status)
{
spin_lock(&sack_sl);
if (sack_state == CC2520_SACK_TX) {
if (cc2520_packet_requires_ack_wait(cur_tx_buf)) {
DBG((KERN_INFO "[cc2520] - Entering TX wait state.\n"));
sack_state = CC2520_SACK_TX_WAIT;
cc2520_sack_start_timer();
spin_unlock(&sack_sl);
}
else {
sack_state = CC2520_SACK_IDLE;
spin_unlock(&sack_sl);
sack_top->tx_done(status);
}
}
else if (sack_state == CC2520_SACK_TX_ACK) {
sack_state = CC2520_SACK_IDLE;
spin_unlock(&sack_sl);
}
else {
ERR((KERN_ALERT "[cc2520] - ERROR: tx_done state engine in impossible state.\n"));
}
}