Hello.
Added Alan Ott in CC.
regards
Stefan Schmidt
On 14/03/16 21:46, Alexandre Macabies wrote:
When receiving a security-enabled IEEE 802.15.4 frame, the MRF24J40
triggers a SECIF interrupt that needs to be handled for RX processing
to keep functioning properly.
This patch enables the SECIF interrupt and makes the MRF ignores all
hardware processing of security-enabled frames, that is handled by the
ieee802154 stack instead.
Signed-off-by: Alexander Aring <aar@xxxxxxxxxxxxxx>
Signed-off-by: Alexandre Macabies <web+oss@xxxxxxxxxxx>
Reviewed-by: Stefan Schmidt <stefan@xxxxxxxxxxxxxxx>
---
drivers/net/ieee802154/mrf24j40.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ieee802154/mrf24j40.c b/drivers/net/ieee802154/mrf24j40.c
index 764a2bd..adc67be 100644
--- a/drivers/net/ieee802154/mrf24j40.c
+++ b/drivers/net/ieee802154/mrf24j40.c
@@ -85,10 +85,13 @@
#define REG_INTSTAT 0x31 /* Interrupt Status */
#define BIT_TXNIF BIT(0)
#define BIT_RXIF BIT(3)
+#define BIT_SECIF BIT(4)
+#define BIT_SECIGNORE BIT(7)
#define REG_INTCON 0x32 /* Interrupt Control */
#define BIT_TXNIE BIT(0)
#define BIT_RXIE BIT(3)
+#define BIT_SECIE BIT(4)
#define REG_GPIO 0x33 /* GPIO */
#define REG_TRISGPIO 0x34 /* GPIO direction */
@@ -616,7 +619,7 @@ static int mrf24j40_start(struct ieee802154_hw *hw)
/* Clear TXNIE and RXIE. Enable interrupts */
return regmap_update_bits(devrec->regmap_short, REG_INTCON,
- BIT_TXNIE | BIT_RXIE, 0);
+ BIT_TXNIE | BIT_RXIE | BIT_SECIE, 0);
}
static void mrf24j40_stop(struct ieee802154_hw *hw)
@@ -1025,6 +1028,11 @@ static void mrf24j40_intstat_complete(void *context)
enable_irq(devrec->spi->irq);
+ /* Ignore Rx security decryption */
+ if (intstat & BIT_SECIF)
+ regmap_write_async(devrec->regmap_short, REG_SECCON0,
+ BIT_SECIGNORE);
+
/* Check for TX complete */
if (intstat & BIT_TXNIF)
ieee802154_xmit_complete(devrec->hw, devrec->tx_skb, false);
--
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