Merge tag 'nfc-next-3.6-1' of git://git.kernel.org/pub/scm/linux/kern…

…el/git/sameo/nfc-3.0

drivers/nfc/pn544_hci.c

@@ -576,15 +576,17 @@ static int pn544_hci_xmit(struct nfc_shdlc *shdlc, struct sk_buff *skb)
 	return pn544_hci_i2c_write(client, skb->data, skb->len);
 }
 
-static int pn544_hci_start_poll(struct nfc_shdlc *shdlc, u32 protocols)
+static int pn544_hci_start_poll(struct nfc_shdlc *shdlc,
+				u32 im_protocols, u32 tm_protocols)
 {
 	struct nfc_hci_dev *hdev = nfc_shdlc_get_hci_dev(shdlc);
 	u8 phases = 0;
 	int r;
 	u8 duration[2];
 	u8 activated;
 
-	pr_info(DRIVER_DESC ": %s protocols = %d\n", __func__, protocols);
+	pr_info(DRIVER_DESC ": %s protocols 0x%x 0x%x\n",
+		__func__, im_protocols, tm_protocols);
 
 	r = nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE,
 			       NFC_HCI_EVT_END_OPERATION, NULL, 0);
@@ -604,10 +606,10 @@ static int pn544_hci_start_poll(struct nfc_shdlc *shdlc, u32 protocols)
 	if (r < 0)
 		return r;
 
-	if (protocols & (NFC_PROTO_ISO14443_MASK | NFC_PROTO_MIFARE_MASK |
+	if (im_protocols & (NFC_PROTO_ISO14443_MASK | NFC_PROTO_MIFARE_MASK |
 			 NFC_PROTO_JEWEL_MASK))
 		phases |= 1;		/* Type A */
-	if (protocols & NFC_PROTO_FELICA_MASK) {
+	if (im_protocols & NFC_PROTO_FELICA_MASK) {
 		phases |= (1 << 2);	/* Type F 212 */
 		phases |= (1 << 3);	/* Type F 424 */
 	}

include/linux/nfc.h

@@ -56,6 +56,10 @@
  *	%NFC_ATTR_PROTOCOLS)
  * @NFC_EVENT_DEVICE_REMOVED: event emitted when a device is removed
  *	(it sends %NFC_ATTR_DEVICE_INDEX)
+ * @NFC_EVENT_TM_ACTIVATED: event emitted when the adapter is activated in
+ *      target mode.
+ * @NFC_EVENT_DEVICE_DEACTIVATED: event emitted when the adapter is deactivated
+ *      from target mode.
  */
 enum nfc_commands {
 	NFC_CMD_UNSPEC,
@@ -71,6 +75,8 @@ enum nfc_commands {
 	NFC_EVENT_DEVICE_ADDED,
 	NFC_EVENT_DEVICE_REMOVED,
 	NFC_EVENT_TARGET_LOST,
+	NFC_EVENT_TM_ACTIVATED,
+	NFC_EVENT_TM_DEACTIVATED,
 /* private: internal use only */
 	__NFC_CMD_AFTER_LAST
 };
@@ -94,6 +100,8 @@ enum nfc_commands {
  * @NFC_ATTR_TARGET_SENSF_RES: NFC-F targets extra information, max 18 bytes
  * @NFC_ATTR_COMM_MODE: Passive or active mode
  * @NFC_ATTR_RF_MODE: Initiator or target
+ * @NFC_ATTR_IM_PROTOCOLS: Initiator mode protocols to poll for
+ * @NFC_ATTR_TM_PROTOCOLS: Target mode protocols to listen for
  */
 enum nfc_attrs {
 	NFC_ATTR_UNSPEC,
@@ -109,6 +117,8 @@ enum nfc_attrs {
 	NFC_ATTR_COMM_MODE,
 	NFC_ATTR_RF_MODE,
 	NFC_ATTR_DEVICE_POWERED,
+	NFC_ATTR_IM_PROTOCOLS,
+	NFC_ATTR_TM_PROTOCOLS,
 /* private: internal use only */
 	__NFC_ATTR_AFTER_LAST
 };
@@ -118,6 +128,7 @@ enum nfc_attrs {
 #define NFC_NFCID1_MAXSIZE 10
 #define NFC_SENSB_RES_MAXSIZE 12
 #define NFC_SENSF_RES_MAXSIZE 18
+#define NFC_GB_MAXSIZE        48
 
 /* NFC protocols */
 #define NFC_PROTO_JEWEL		1
@@ -135,6 +146,7 @@ enum nfc_attrs {
 /* NFC RF modes */
 #define NFC_RF_INITIATOR 0
 #define NFC_RF_TARGET    1
+#define NFC_RF_NONE      2
 
 /* NFC protocols masks used in bitsets */
 #define NFC_PROTO_JEWEL_MASK	(1 << NFC_PROTO_JEWEL)

include/net/nfc/hci.h

@@ -31,7 +31,8 @@ struct nfc_hci_ops {
 	void (*close) (struct nfc_hci_dev *hdev);
 	int (*hci_ready) (struct nfc_hci_dev *hdev);
 	int (*xmit) (struct nfc_hci_dev *hdev, struct sk_buff *skb);
-	int (*start_poll) (struct nfc_hci_dev *hdev, u32 protocols);
+	int (*start_poll) (struct nfc_hci_dev *hdev,
+			   u32 im_protocols, u32 tm_protocols);
 	int (*target_from_gate) (struct nfc_hci_dev *hdev, u8 gate,
 				 struct nfc_target *target);
 	int (*complete_target_discovered) (struct nfc_hci_dev *hdev, u8 gate,

include/net/nfc/nfc.h

@@ -53,7 +53,8 @@ struct nfc_target;
 struct nfc_ops {
 	int (*dev_up)(struct nfc_dev *dev);
 	int (*dev_down)(struct nfc_dev *dev);
-	int (*start_poll)(struct nfc_dev *dev, u32 protocols);
+	int (*start_poll)(struct nfc_dev *dev,
+			  u32 im_protocols, u32 tm_protocols);
 	void (*stop_poll)(struct nfc_dev *dev);
 	int (*dep_link_up)(struct nfc_dev *dev, struct nfc_target *target,
 			   u8 comm_mode, u8 *gb, size_t gb_len);
@@ -62,9 +63,10 @@ struct nfc_ops {
 			       u32 protocol);
 	void (*deactivate_target)(struct nfc_dev *dev,
 				  struct nfc_target *target);
-	int (*data_exchange)(struct nfc_dev *dev, struct nfc_target *target,
+	int (*im_transceive)(struct nfc_dev *dev, struct nfc_target *target,
 			     struct sk_buff *skb, data_exchange_cb_t cb,
 			     void *cb_context);
+	int (*tm_send)(struct nfc_dev *dev, struct sk_buff *skb);
 	int (*check_presence)(struct nfc_dev *dev, struct nfc_target *target);
 };
 
@@ -99,10 +101,10 @@ struct nfc_dev {
 	int targets_generation;
 	struct device dev;
 	bool dev_up;
+	u8 rf_mode;
 	bool polling;
 	struct nfc_target *active_target;
 	bool dep_link_up;
-	u32 dep_rf_mode;
 	struct nfc_genl_data genl_data;
 	u32 supported_protocols;
 
@@ -188,6 +190,7 @@ struct sk_buff *nfc_alloc_recv_skb(unsigned int size, gfp_t gfp);
 
 int nfc_set_remote_general_bytes(struct nfc_dev *dev,
 				 u8 *gt, u8 gt_len);
+u8 *nfc_get_local_general_bytes(struct nfc_dev *dev, size_t *gb_len);
 
 int nfc_targets_found(struct nfc_dev *dev,
 		      struct nfc_target *targets, int ntargets);
@@ -196,4 +199,9 @@ int nfc_target_lost(struct nfc_dev *dev, u32 target_idx);
 int nfc_dep_link_is_up(struct nfc_dev *dev, u32 target_idx,
 		       u8 comm_mode, u8 rf_mode);
 
+int nfc_tm_activated(struct nfc_dev *dev, u32 protocol, u8 comm_mode,
+		     u8 *gb, size_t gb_len);
+int nfc_tm_deactivated(struct nfc_dev *dev);
+int nfc_tm_data_received(struct nfc_dev *dev, struct sk_buff *skb);
+
 #endif /* __NET_NFC_H */

include/net/nfc/shdlc.h

@@ -27,7 +27,8 @@ struct nfc_shdlc_ops {
 	void (*close) (struct nfc_shdlc *shdlc);
 	int (*hci_ready) (struct nfc_shdlc *shdlc);
 	int (*xmit) (struct nfc_shdlc *shdlc, struct sk_buff *skb);
-	int (*start_poll) (struct nfc_shdlc *shdlc, u32 protocols);
+	int (*start_poll) (struct nfc_shdlc *shdlc,
+			   u32 im_protocols, u32 tm_protocols);
 	int (*target_from_gate) (struct nfc_shdlc *shdlc, u8 gate,
 				 struct nfc_target *target);
 	int (*complete_target_discovered) (struct nfc_shdlc *shdlc, u8 gate,

net/nfc/core.c

@@ -121,14 +121,14 @@ int nfc_dev_down(struct nfc_dev *dev)
  * The device remains polling for targets until a target is found or
  * the nfc_stop_poll function is called.
  */
-int nfc_start_poll(struct nfc_dev *dev, u32 protocols)
+int nfc_start_poll(struct nfc_dev *dev, u32 im_protocols, u32 tm_protocols)
 {
 	int rc;
 
-	pr_debug("dev_name=%s protocols=0x%x\n",
-		 dev_name(&dev->dev), protocols);
+	pr_debug("dev_name %s initiator protocols 0x%x target protocols 0x%x\n",
+		 dev_name(&dev->dev), im_protocols, tm_protocols);
 
-	if (!protocols)
+	if (!im_protocols && !tm_protocols)
 		return -EINVAL;
 
 	device_lock(&dev->dev);
@@ -143,9 +143,11 @@ int nfc_start_poll(struct nfc_dev *dev, u32 protocols)
 		goto error;
 	}
 
-	rc = dev->ops->start_poll(dev, protocols);
-	if (!rc)
+	rc = dev->ops->start_poll(dev, im_protocols, tm_protocols);
+	if (!rc) {
 		dev->polling = true;
+		dev->rf_mode = NFC_RF_NONE;
+	}
 
 error:
 	device_unlock(&dev->dev);
@@ -235,8 +237,10 @@ int nfc_dep_link_up(struct nfc_dev *dev, int target_index, u8 comm_mode)
 	}
 
 	rc = dev->ops->dep_link_up(dev, target, comm_mode, gb, gb_len);
-	if (!rc)
+	if (!rc) {
 		dev->active_target = target;
+		dev->rf_mode = NFC_RF_INITIATOR;
+	}
 
 error:
 	device_unlock(&dev->dev);
@@ -264,11 +268,6 @@ int nfc_dep_link_down(struct nfc_dev *dev)
 		goto error;
 	}
 
-	if (dev->dep_rf_mode == NFC_RF_TARGET) {
-		rc = -EOPNOTSUPP;
-		goto error;
-	}
-
 	rc = dev->ops->dep_link_down(dev);
 	if (!rc) {
 		dev->dep_link_up = false;
@@ -286,7 +285,6 @@ int nfc_dep_link_is_up(struct nfc_dev *dev, u32 target_idx,
 		       u8 comm_mode, u8 rf_mode)
 {
 	dev->dep_link_up = true;
-	dev->dep_rf_mode = rf_mode;
 
 	nfc_llcp_mac_is_up(dev, target_idx, comm_mode, rf_mode);
 
@@ -330,6 +328,7 @@ int nfc_activate_target(struct nfc_dev *dev, u32 target_idx, u32 protocol)
 	rc = dev->ops->activate_target(dev, target, protocol);
 	if (!rc) {
 		dev->active_target = target;
+		dev->rf_mode = NFC_RF_INITIATOR;
 
 		if (dev->ops->check_presence)
 			mod_timer(&dev->check_pres_timer, jiffies +
@@ -409,27 +408,30 @@ int nfc_data_exchange(struct nfc_dev *dev, u32 target_idx, struct sk_buff *skb,
 		goto error;
 	}
 
-	if (dev->active_target == NULL) {
-		rc = -ENOTCONN;
-		kfree_skb(skb);
-		goto error;
-	}
+	if (dev->rf_mode == NFC_RF_INITIATOR && dev->active_target != NULL) {
+		if (dev->active_target->idx != target_idx) {
+			rc = -EADDRNOTAVAIL;
+			kfree_skb(skb);
+			goto error;
+		}
 
-	if (dev->active_target->idx != target_idx) {
-		rc = -EADDRNOTAVAIL;
+		if (dev->ops->check_presence)
+			del_timer_sync(&dev->check_pres_timer);
+
+		rc = dev->ops->im_transceive(dev, dev->active_target, skb, cb,
+					     cb_context);
+
+		if (!rc && dev->ops->check_presence)
+			mod_timer(&dev->check_pres_timer, jiffies +
+				  msecs_to_jiffies(NFC_CHECK_PRES_FREQ_MS));
+	} else if (dev->rf_mode == NFC_RF_TARGET && dev->ops->tm_send != NULL) {
+		rc = dev->ops->tm_send(dev, skb);
+	} else {
+		rc = -ENOTCONN;
 		kfree_skb(skb);
 		goto error;
 	}
 
-	if (dev->ops->check_presence)
-		del_timer_sync(&dev->check_pres_timer);
-
-	rc = dev->ops->data_exchange(dev, dev->active_target, skb, cb,
-				     cb_context);
-
-	if (!rc && dev->ops->check_presence)
-		mod_timer(&dev->check_pres_timer, jiffies +
-			  msecs_to_jiffies(NFC_CHECK_PRES_FREQ_MS));
 
 error:
 	device_unlock(&dev->dev);
@@ -447,6 +449,63 @@ int nfc_set_remote_general_bytes(struct nfc_dev *dev, u8 *gb, u8 gb_len)
 }
 EXPORT_SYMBOL(nfc_set_remote_general_bytes);
 
+u8 *nfc_get_local_general_bytes(struct nfc_dev *dev, size_t *gb_len)
+{
+	pr_debug("dev_name=%s\n", dev_name(&dev->dev));
+
+	return nfc_llcp_general_bytes(dev, gb_len);
+}
+EXPORT_SYMBOL(nfc_get_local_general_bytes);
+
+int nfc_tm_data_received(struct nfc_dev *dev, struct sk_buff *skb)
+{
+	/* Only LLCP target mode for now */
+	if (dev->dep_link_up == false) {
+		kfree_skb(skb);
+		return -ENOLINK;
+	}
+
+	return nfc_llcp_data_received(dev, skb);
+}
+EXPORT_SYMBOL(nfc_tm_data_received);
+
+int nfc_tm_activated(struct nfc_dev *dev, u32 protocol, u8 comm_mode,
+		     u8 *gb, size_t gb_len)
+{
+	int rc;
+
+	device_lock(&dev->dev);
+
+	dev->polling = false;
+
+	if (gb != NULL) {
+		rc = nfc_set_remote_general_bytes(dev, gb, gb_len);
+		if (rc < 0)
+			goto out;
+	}
+
+	dev->rf_mode = NFC_RF_TARGET;
+
+	if (protocol == NFC_PROTO_NFC_DEP_MASK)
+		nfc_dep_link_is_up(dev, 0, comm_mode, NFC_RF_TARGET);
+
+	rc = nfc_genl_tm_activated(dev, protocol);
+
+out:
+	device_unlock(&dev->dev);
+
+	return rc;
+}
+EXPORT_SYMBOL(nfc_tm_activated);
+
+int nfc_tm_deactivated(struct nfc_dev *dev)
+{
+	dev->dep_link_up = false;
+
+	return nfc_genl_tm_deactivated(dev);
+}
+EXPORT_SYMBOL(nfc_tm_deactivated);
+
 /**
  * nfc_alloc_send_skb - allocate a skb for data exchange responses
  *
@@ -678,7 +737,7 @@ struct nfc_dev *nfc_allocate_device(struct nfc_ops *ops,
 	struct nfc_dev *dev;
 
 	if (!ops->start_poll || !ops->stop_poll || !ops->activate_target ||
-	    !ops->deactivate_target || !ops->data_exchange)
+	    !ops->deactivate_target || !ops->im_transceive)
 		return NULL;
 
 	if (!supported_protocols)

net/nfc/hci/core.c

@@ -481,12 +481,13 @@ static int hci_dev_down(struct nfc_dev *nfc_dev)
 	return 0;
 }
 
-static int hci_start_poll(struct nfc_dev *nfc_dev, u32 protocols)
+static int hci_start_poll(struct nfc_dev *nfc_dev,
+			  u32 im_protocols, u32 tm_protocols)
 {
 	struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
 
 	if (hdev->ops->start_poll)
-		return hdev->ops->start_poll(hdev, protocols);
+		return hdev->ops->start_poll(hdev, im_protocols, tm_protocols);
 	else
 		return nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE,
 				       NFC_HCI_EVT_READER_REQUESTED, NULL, 0);
@@ -511,9 +512,9 @@ static void hci_deactivate_target(struct nfc_dev *nfc_dev,
 {
 }
 
-static int hci_data_exchange(struct nfc_dev *nfc_dev, struct nfc_target *target,
-			     struct sk_buff *skb, data_exchange_cb_t cb,
-			     void *cb_context)
+static int hci_transceive(struct nfc_dev *nfc_dev, struct nfc_target *target,
+			  struct sk_buff *skb, data_exchange_cb_t cb,
+			  void *cb_context)
 {
 	struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
 	int r;
@@ -579,7 +580,7 @@ static struct nfc_ops hci_nfc_ops = {
 	.stop_poll = hci_stop_poll,
 	.activate_target = hci_activate_target,
 	.deactivate_target = hci_deactivate_target,
-	.data_exchange = hci_data_exchange,
+	.im_transceive = hci_transceive,
 	.check_presence = hci_check_presence,
 };