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mrf24j40: Enable link-layer acknowledgement and retry

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On the MRF24J40, link-layer acknowledgment request and retry must be
turned on explicitly for each packet.  Turn this on in the hardware based
on the FC_ACK_REQ bit being set in the packet.

Also, now that failure to receive an ACK will cause the hardware to report
failure of transmission, change the log level for this failure to debug
level.

Signed-off-by: Alan Ott <alan@signal11.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alan Ott 2013-04-05 10:34:51 +00:00 committed by David S. Miller
parent c17277f7d7
commit cbde8123f6
1 changed files with 5 additions and 2 deletions
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7
drivers/net/ieee802154/mrf24j40.c
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@ -25,6 +25,7 @@
#include <linux/pinctrl/consumer.h>
#include <net/wpan-phy.h>
#include <net/mac802154.h>
#include <net/ieee802154.h>
/* MRF24J40 Short Address Registers */
#define REG_RXMCR 0x00 /* Receive MAC control */
@ -349,7 +350,9 @@ static int mrf24j40_tx(struct ieee802154_dev *dev, struct sk_buff *skb)
if (ret)
goto err;
val |= 0x1;
val &= ~0x4;
/* Set TXNACKREQ if the ACK bit is set in the packet. */
if (skb->data[0] & IEEE802154_FC_ACK_REQ)
val |= 0x4;
write_short_reg(devrec, REG_TXNCON, val);
INIT_COMPLETION(devrec->tx_complete);
@ -371,7 +374,7 @@ static int mrf24j40_tx(struct ieee802154_dev *dev, struct sk_buff *skb)
if (ret)
goto err;
if (val & 0x1) {
dev_err(printdev(devrec), "Error Sending. Retry count exceeded\n");
dev_dbg(printdev(devrec), "Error Sending. Retry count exceeded\n");
ret = -ECOMM; /* TODO: Better error code ? */
} else
dev_dbg(printdev(devrec), "Packet Sent\n");