NFC: pn533: Enable AUTO RFCA

The AUTO RFCA bit forbids the pn533 chipset to turn its radio on whenever an external field is present. Without this bit set, some devices seems to get over flood by the pn533 rf field and thus become hardly detectable. Signed-off-by: Samuel Ortiz <[email protected]>
pop-os · Aug 13, 2013 · 3a8eab3 · 3a8eab3
1 parent 5eef484
commit 3a8eab3
Showing 1 changed file with 6 additions and 3 deletions.
diff --git a/drivers/nfc/pn533.c b/drivers/nfc/pn533.c
@@ -168,8 +168,9 @@ struct pn533_fw_version {
 #define PN533_CFGITEM_MAX_RETRIES 0x05
 #define PN533_CFGITEM_PASORI      0x82
 
-#define PN533_CFGITEM_RF_FIELD_ON  0x1
-#define PN533_CFGITEM_RF_FIELD_OFF 0x0
+#define PN533_CFGITEM_RF_FIELD_AUTO_RFCA 0x2
+#define PN533_CFGITEM_RF_FIELD_ON        0x1
+#define PN533_CFGITEM_RF_FIELD_OFF       0x0
 
 #define PN533_CONFIG_TIMING_102 0xb
 #define PN533_CONFIG_TIMING_204 0xc
@@ -1696,7 +1697,7 @@ static void pn533_wq_rf(struct work_struct *work)
 		return;
 
 	*skb_put(skb, 1) = PN533_CFGITEM_RF_FIELD;
-	*skb_put(skb, 1) = 0;
+	*skb_put(skb, 1) = PN533_CFGITEM_RF_FIELD_AUTO_RFCA;
 
 	rc = pn533_send_cmd_async(dev, PN533_CMD_RF_CONFIGURATION, skb,
 				  pn533_rf_complete, NULL);
@@ -2598,6 +2599,8 @@ static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf)
 	u8 rf_field = !!rf;
 	int rc;
 
+	rf_field |= PN533_CFGITEM_RF_FIELD_AUTO_RFCA;
+
 	rc = pn533_set_configuration(dev, PN533_CFGITEM_RF_FIELD,
 				     (u8 *)&rf_field, 1);
 	if (rc) {