Merge tag 'nfc-next-3.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/nfc-next

Samuel Ortiz <sameo@linux.intel.com> says:

"NFC: 3.17 pull request

This is the NFC pull request for 3.17.
This is a rather quiet one, we have:

- A new driver from ST Microelectronics for their NCI ST21NFCB,
  including device tree  support.

- p2p support for the ST21NFCA driver

- A few fixes an enhancements for the NFC digital layer"

Signed-off-by: John W. Linville <linville@tuxdriver.com>

Documentation/devicetree/bindings/net/nfc/st21nfcb.txt

@@ -0,0 +1,33 @@
+* STMicroelectronics SAS. ST21NFCB NFC Controller
+
+Required properties:
+- compatible: Should be "st,st21nfcb_i2c".
+- clock-frequency: I²C work frequency.
+- reg: address on the bus
+- interrupt-parent: phandle for the interrupt gpio controller
+- interrupts: GPIO interrupt to which the chip is connected
+- reset-gpios: Output GPIO pin used to reset the ST21NFCB
+
+Optional SoC Specific Properties:
+- pinctrl-names: Contains only one value - "default".
+- pintctrl-0: Specifies the pin control groups used for this controller.
+
+Example (for ARM-based BeagleBoard xM with ST21NFCB on I2C2):
+
+&i2c2 {
+
+	status = "okay";
+
+	st21nfcb: st21nfcb@8 {
+
+		compatible = "st,st21nfcb_i2c";
+
+		reg = <0x08>;
+		clock-frequency = <400000>;
+
+		interrupt-parent = <&gpio5>;
+		interrupts = <2 IRQ_TYPE_LEVEL_LOW>;
+
+		reset-gpios = <&gpio5 29 GPIO_ACTIVE_HIGH>;
+	};
+};

drivers/nfc/Kconfig

@@ -72,5 +72,5 @@ source "drivers/nfc/pn544/Kconfig"
 source "drivers/nfc/microread/Kconfig"
 source "drivers/nfc/nfcmrvl/Kconfig"
 source "drivers/nfc/st21nfca/Kconfig"
-
+source "drivers/nfc/st21nfcb/Kconfig"
 endmenu

drivers/nfc/Makefile

@@ -11,6 +11,7 @@ obj-$(CONFIG_NFC_SIM)		+= nfcsim.o
 obj-$(CONFIG_NFC_PORT100)	+= port100.o
 obj-$(CONFIG_NFC_MRVL)		+= nfcmrvl/
 obj-$(CONFIG_NFC_TRF7970A)	+= trf7970a.o
-obj-$(CONFIG_NFC_ST21NFCA)  += st21nfca/
+obj-$(CONFIG_NFC_ST21NFCA)  	+= st21nfca/
+obj-$(CONFIG_NFC_ST21NFCB)	+= st21nfcb/
 
 ccflags-$(CONFIG_NFC_DEBUG) := -DDEBUG

drivers/nfc/st21nfca/Makefile

@@ -4,5 +4,5 @@
 
 st21nfca_i2c-objs  = i2c.o
 
-obj-$(CONFIG_NFC_ST21NFCA)     += st21nfca.o
+obj-$(CONFIG_NFC_ST21NFCA)     += st21nfca.o st21nfca_dep.o
 obj-$(CONFIG_NFC_ST21NFCA_I2C) += st21nfca_i2c.o

drivers/nfc/st21nfca/i2c.c

@@ -93,7 +93,7 @@ struct st21nfca_i2c_phy {
 	int hard_fault;
 	struct mutex phy_lock;
 };
-static u8 len_seq[] = { 13, 24, 15, 29 };
+static u8 len_seq[] = { 16, 24, 12, 29 };
 static u16 wait_tab[] = { 2, 3, 5, 15, 20, 40};
 
 #define I2C_DUMP_SKB(info, skb)					\
@@ -397,12 +397,11 @@ static int st21nfca_hci_i2c_read(struct st21nfca_i2c_phy *phy,
 		 * The first read sequence does not start with SOF.
 		 * Data is corrupeted so we drop it.
 		 */
-		if (!phy->current_read_len && buf[0] != ST21NFCA_SOF_EOF) {
+		if (!phy->current_read_len && !IS_START_OF_FRAME(buf)) {
 			skb_trim(skb, 0);
 			phy->current_read_len = 0;
 			return -EIO;
-		} else if (phy->current_read_len &&
-			IS_START_OF_FRAME(buf)) {
+		} else if (phy->current_read_len && IS_START_OF_FRAME(buf)) {
 			/*
 			 * Previous frame transmission was interrupted and
 			 * the frame got repeated.
@@ -487,6 +486,8 @@ static irqreturn_t st21nfca_hci_irq_thread_fn(int irq, void *phy_id)
 		 */
 		nfc_hci_recv_frame(phy->hdev, phy->pending_skb);
 		phy->crc_trials = 0;
+	} else {
+		kfree_skb(phy->pending_skb);
 	}
 
 	phy->pending_skb = alloc_skb(ST21NFCA_HCI_LLC_MAX_SIZE * 2, GFP_KERNEL);

drivers/nfc/st21nfca/st21nfca.c

@@ -22,6 +22,7 @@
 #include <net/nfc/llc.h>
 
 #include "st21nfca.h"
+#include "st21nfca_dep.h"
 
 #define DRIVER_DESC "HCI NFC driver for ST21NFCA"
 
@@ -53,6 +54,7 @@
 #define ST21NFCA_DM_PIPE_CREATED        0x02
 #define ST21NFCA_DM_PIPE_OPEN           0x04
 #define ST21NFCA_DM_RF_ACTIVE           0x80
+#define ST21NFCA_DM_DISCONNECT		0x30
 
 #define ST21NFCA_DM_IS_PIPE_OPEN(p) \
 	((p & 0x0f) == (ST21NFCA_DM_PIPE_CREATED | ST21NFCA_DM_PIPE_OPEN))
@@ -72,6 +74,7 @@ static struct nfc_hci_gate st21nfca_gates[] = {
 	{ST21NFCA_RF_READER_F_GATE, NFC_HCI_INVALID_PIPE},
 	{ST21NFCA_RF_READER_14443_3_A_GATE, NFC_HCI_INVALID_PIPE},
 	{ST21NFCA_RF_READER_ISO15693_GATE, NFC_HCI_INVALID_PIPE},
+	{ST21NFCA_RF_CARD_F_GATE, NFC_HCI_INVALID_PIPE},
 };
 
 struct st21nfca_pipe_info {
@@ -299,6 +302,9 @@ static int st21nfca_hci_start_poll(struct nfc_hci_dev *hdev,
 				   u32 im_protocols, u32 tm_protocols)
 {
 	int r;
+	u32 pol_req;
+	u8 param[19];
+	struct sk_buff *datarate_skb;
 
 	pr_info(DRIVER_DESC ": %s protocols 0x%x 0x%x\n",
 		__func__, im_protocols, tm_protocols);
@@ -331,6 +337,31 @@ static int st21nfca_hci_start_poll(struct nfc_hci_dev *hdev,
 					ST21NFCA_RF_READER_F_GATE);
 			if (r < 0)
 				return r;
+		} else {
+			hdev->gb = nfc_get_local_general_bytes(hdev->ndev,
+							       &hdev->gb_len);
+
+			if (hdev->gb == NULL || hdev->gb_len == 0) {
+				im_protocols &= ~NFC_PROTO_NFC_DEP_MASK;
+				tm_protocols &= ~NFC_PROTO_NFC_DEP_MASK;
+			}
+
+			param[0] = ST21NFCA_RF_READER_F_DATARATE_106 |
+			    ST21NFCA_RF_READER_F_DATARATE_212 |
+			    ST21NFCA_RF_READER_F_DATARATE_424;
+			r = nfc_hci_set_param(hdev, ST21NFCA_RF_READER_F_GATE,
+					      ST21NFCA_RF_READER_F_DATARATE,
+					      param, 1);
+			if (r < 0)
+				return r;
+
+			pol_req =
+			    be32_to_cpu(ST21NFCA_RF_READER_F_POL_REQ_DEFAULT);
+			r = nfc_hci_set_param(hdev, ST21NFCA_RF_READER_F_GATE,
+					      ST21NFCA_RF_READER_F_POL_REQ,
+					      (u8 *) &pol_req, 4);
+			if (r < 0)
+				return r;
 		}
 
 		if ((ST21NFCA_RF_READER_14443_3_A_GATE & im_protocols) == 0) {
@@ -353,9 +384,104 @@ static int st21nfca_hci_start_poll(struct nfc_hci_dev *hdev,
 			nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE,
 					   NFC_HCI_EVT_END_OPERATION, NULL, 0);
 	}
+
+	if (tm_protocols & NFC_PROTO_NFC_DEP_MASK) {
+		r = nfc_hci_get_param(hdev, ST21NFCA_RF_CARD_F_GATE,
+				      ST21NFCA_RF_CARD_F_DATARATE,
+				      &datarate_skb);
+		if (r < 0)
+			return r;
+
+		/* Configure the maximum supported datarate to 424Kbps */
+		if (datarate_skb->len > 0 &&
+		    datarate_skb->data[0] !=
+		    ST21NFCA_RF_CARD_F_DATARATE_212_424) {
+			param[0] = ST21NFCA_RF_CARD_F_DATARATE_212_424;
+			r = nfc_hci_set_param(hdev, ST21NFCA_RF_CARD_F_GATE,
+					      ST21NFCA_RF_CARD_F_DATARATE,
+					      param, 1);
+			if (r < 0)
+				return r;
+		}
+
+		/*
+		 * Configure sens_res
+		 *
+		 * NFC Forum Digital Spec Table 7:
+		 * NFCID1 size: triple (10 bytes)
+		 */
+		param[0] = 0x00;
+		param[1] = 0x08;
+		r = nfc_hci_set_param(hdev, ST21NFCA_RF_CARD_F_GATE,
+				      ST21NFCA_RF_CARD_F_SENS_RES, param, 2);
+		if (r < 0)
+			return r;
+
+		/*
+		 * Configure sel_res
+		 *
+		 * NFC Forum Digistal Spec Table 17:
+		 * b3 set to 0b (value b7-b6):
+		 * - 10b: Configured for NFC-DEP Protocol
+		 */
+		param[0] = 0x40;
+		r = nfc_hci_set_param(hdev, ST21NFCA_RF_CARD_F_GATE,
+				      ST21NFCA_RF_CARD_F_SEL_RES, param, 1);
+		if (r < 0)
+			return r;
+
+		/* Configure NFCID1 Random uid */
+		r = nfc_hci_set_param(hdev, ST21NFCA_RF_CARD_F_GATE,
+				      ST21NFCA_RF_CARD_F_NFCID1, NULL, 0);
+		if (r < 0)
+			return r;
+
+		/* Configure NFCID2_LIST */
+		/* System Code */
+		param[0] = 0x00;
+		param[1] = 0x00;
+		/* NFCID2 */
+		param[2] = 0x01;
+		param[3] = 0xfe;
+		param[4] = 'S';
+		param[5] = 'T';
+		param[6] = 'M';
+		param[7] = 'i';
+		param[8] = 'c';
+		param[9] = 'r';
+		/* 8 byte Pad bytes used for polling respone frame */
+
+		/*
+		 * Configuration byte:
+		 * - bit 0: define the default NFCID2 entry used when the
+		 * system code is equal to 'FFFF'
+		 * - bit 1: use a random value for lowest 6 bytes of
+		 * NFCID2 value
+		 * - bit 2: ignore polling request frame if request code
+		 * is equal to '01'
+		 * - Other bits are RFU
+		 */
+		param[18] = 0x01;
+		r = nfc_hci_set_param(hdev, ST21NFCA_RF_CARD_F_GATE,
+				      ST21NFCA_RF_CARD_F_NFCID2_LIST, param,
+				      19);
+		if (r < 0)
+			return r;
+
+		param[0] = 0x02;
+		r = nfc_hci_set_param(hdev, ST21NFCA_RF_CARD_F_GATE,
+				      ST21NFCA_RF_CARD_F_MODE, param, 1);
+	}
+
 	return r;
 }
 
+static void st21nfca_hci_stop_poll(struct nfc_hci_dev *hdev)
+{
+	nfc_hci_send_cmd(hdev, ST21NFCA_DEVICE_MGNT_GATE,
+			ST21NFCA_DM_DISCONNECT, NULL, 0, NULL);
+}
+
 static int st21nfca_get_iso14443_3_atqa(struct nfc_hci_dev *hdev, u16 *atqa)
 {
 	int r;
@@ -451,6 +577,26 @@ exit:
 	return r;
 }
 
+static int st21nfca_hci_dep_link_up(struct nfc_hci_dev *hdev,
+				    struct nfc_target *target, u8 comm_mode,
+				    u8 *gb, size_t gb_len)
+{
+	struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
+
+	info->dep_info.idx = target->idx;
+	return st21nfca_im_send_atr_req(hdev, gb, gb_len);
+}
+
+static int st21nfca_hci_dep_link_down(struct nfc_hci_dev *hdev)
+{
+	struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
+
+	info->state = ST21NFCA_ST_READY;
+
+	return nfc_hci_send_cmd(hdev, ST21NFCA_DEVICE_MGNT_GATE,
+				ST21NFCA_DM_DISCONNECT, NULL, 0, NULL);
+}
+
 static int st21nfca_hci_target_from_gate(struct nfc_hci_dev *hdev, u8 gate,
 					 struct nfc_target *target)
 {
@@ -505,6 +651,69 @@ static int st21nfca_hci_target_from_gate(struct nfc_hci_dev *hdev, u8 gate,
 	return 0;
 }
 
+static int st21nfca_hci_complete_target_discovered(struct nfc_hci_dev *hdev,
+						u8 gate,
+						struct nfc_target *target)
+{
+	int r;
+	struct sk_buff *nfcid2_skb = NULL, *nfcid1_skb;
+
+	if (gate == ST21NFCA_RF_READER_F_GATE) {
+		r = nfc_hci_get_param(hdev, ST21NFCA_RF_READER_F_GATE,
+				ST21NFCA_RF_READER_F_NFCID2, &nfcid2_skb);
+		if (r < 0)
+			goto exit;
+
+		if (nfcid2_skb->len > NFC_SENSF_RES_MAXSIZE) {
+			r = -EPROTO;
+			goto exit;
+		}
+
+		/*
+		 * - After the recepton of polling response for type F frame
+		 * at 212 or 424 Kbit/s, NFCID2 registry parameters will be
+		 * updated.
+		 * - After the reception of SEL_RES with NFCIP-1 compliant bit
+		 * set for type A frame NFCID1 will be updated
+		 */
+		if (nfcid2_skb->len > 0) {
+			/* P2P in type F */
+			memcpy(target->sensf_res, nfcid2_skb->data,
+				nfcid2_skb->len);
+			target->sensf_res_len = nfcid2_skb->len;
+			/* NFC Forum Digital Protocol Table 44 */
+			if (target->sensf_res[0] == 0x01 &&
+			    target->sensf_res[1] == 0xfe)
+				target->supported_protocols =
+							NFC_PROTO_NFC_DEP_MASK;
+			else
+				target->supported_protocols =
+							NFC_PROTO_FELICA_MASK;
+		} else {
+			/* P2P in type A */
+			r = nfc_hci_get_param(hdev, ST21NFCA_RF_READER_F_GATE,
+					ST21NFCA_RF_READER_F_NFCID1,
+					&nfcid1_skb);
+			if (r < 0)
+				goto exit;
+
+			if (nfcid1_skb->len > NFC_NFCID1_MAXSIZE) {
+				r = -EPROTO;
+				goto exit;
+			}
+			memcpy(target->sensf_res, nfcid1_skb->data,
+				nfcid1_skb->len);
+			target->sensf_res_len = nfcid1_skb->len;
+			target->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
+		}
+		target->hci_reader_gate = ST21NFCA_RF_READER_F_GATE;
+	}
+	r = 1;
+exit:
+	kfree_skb(nfcid2_skb);
+	return r;
+}
+
 #define ST21NFCA_CB_TYPE_READER_ISO15693 1
 static void st21nfca_hci_data_exchange_cb(void *context, struct sk_buff *skb,
 					  int err)
@@ -541,6 +750,9 @@ static int st21nfca_hci_im_transceive(struct nfc_hci_dev *hdev,
 
 	switch (target->hci_reader_gate) {
 	case ST21NFCA_RF_READER_F_GATE:
+		if (target->supported_protocols == NFC_PROTO_NFC_DEP_MASK)
+			return st21nfca_im_send_dep_req(hdev, skb);
+
 		*skb_push(skb, 1) = 0x1a;
 		return nfc_hci_send_cmd_async(hdev, target->hci_reader_gate,
 					      ST21NFCA_WR_XCHG_DATA, skb->data,
@@ -569,6 +781,11 @@ static int st21nfca_hci_im_transceive(struct nfc_hci_dev *hdev,
 	}
 }
 
+static int st21nfca_hci_tm_send(struct nfc_hci_dev *hdev, struct sk_buff *skb)
+{
+	return st21nfca_tm_send_dep_res(hdev, skb);
+}
+
 static int st21nfca_hci_check_presence(struct nfc_hci_dev *hdev,
 				       struct nfc_target *target)
 {
@@ -594,6 +811,50 @@ static int st21nfca_hci_check_presence(struct nfc_hci_dev *hdev,
 	}
 }
 
+/*
+ * Returns:
+ * <= 0: driver handled the event, skb consumed
+ *    1: driver does not handle the event, please do standard processing
+ */
+static int st21nfca_hci_event_received(struct nfc_hci_dev *hdev, u8 gate,
+				       u8 event, struct sk_buff *skb)
+{
+	int r;
+	struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
+
+	pr_debug("hci event: %d\n", event);
+
+	switch (event) {
+	case ST21NFCA_EVT_CARD_ACTIVATED:
+		if (gate == ST21NFCA_RF_CARD_F_GATE)
+			info->dep_info.curr_nfc_dep_pni = 0;
+		break;
+	case ST21NFCA_EVT_CARD_DEACTIVATED:
+		break;
+	case ST21NFCA_EVT_FIELD_ON:
+		break;
+	case ST21NFCA_EVT_FIELD_OFF:
+		break;
+	case ST21NFCA_EVT_SEND_DATA:
+		if (gate == ST21NFCA_RF_CARD_F_GATE) {
+			r = st21nfca_tm_event_send_data(hdev, skb, gate);
+			if (r < 0)
+				goto exit;
+			return 0;
+		} else {
+			info->dep_info.curr_nfc_dep_pni = 0;
+			return 1;
+		}
+		break;
+	default:
+		return 1;
+	}
+	kfree_skb(skb);
+	return 0;
+exit:
+	return r;
+}
+
 static struct nfc_hci_ops st21nfca_hci_ops = {
 	.open = st21nfca_hci_open,
 	.close = st21nfca_hci_close,
@@ -601,9 +862,15 @@ static struct nfc_hci_ops st21nfca_hci_ops = {
 	.hci_ready = st21nfca_hci_ready,
 	.xmit = st21nfca_hci_xmit,
 	.start_poll = st21nfca_hci_start_poll,
+	.stop_poll = st21nfca_hci_stop_poll,
+	.dep_link_up = st21nfca_hci_dep_link_up,
+	.dep_link_down = st21nfca_hci_dep_link_down,
 	.target_from_gate = st21nfca_hci_target_from_gate,
+	.complete_target_discovered = st21nfca_hci_complete_target_discovered,
 	.im_transceive = st21nfca_hci_im_transceive,
+	.tm_send = st21nfca_hci_tm_send,
 	.check_presence = st21nfca_hci_check_presence,
+	.event_received = st21nfca_hci_event_received,
 };
 
 int st21nfca_hci_probe(void *phy_id, struct nfc_phy_ops *phy_ops,
@@ -648,7 +915,8 @@ int st21nfca_hci_probe(void *phy_id, struct nfc_phy_ops *phy_ops,
 	    NFC_PROTO_FELICA_MASK |
 	    NFC_PROTO_ISO14443_MASK |
 	    NFC_PROTO_ISO14443_B_MASK |
-	    NFC_PROTO_ISO15693_MASK;
+	    NFC_PROTO_ISO15693_MASK |
+	    NFC_PROTO_NFC_DEP_MASK;
 
 	set_bit(NFC_HCI_QUIRK_SHORT_CLEAR, &quirks);
 
@@ -671,6 +939,7 @@ int st21nfca_hci_probe(void *phy_id, struct nfc_phy_ops *phy_ops,
 		goto err_regdev;
 
 	*hdev = info->hdev;
+	st21nfca_dep_init(info->hdev);
 
 	return 0;
 
@@ -688,6 +957,7 @@ void st21nfca_hci_remove(struct nfc_hci_dev *hdev)
 {
 	struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
 
+	st21nfca_dep_deinit(hdev);
 	nfc_hci_unregister_device(hdev);
 	nfc_hci_free_device(hdev);
 	kfree(info);

drivers/nfc/st21nfca/st21nfca.h

@@ -19,6 +19,8 @@
 
 #include <net/nfc/hci.h>
 
+#include "st21nfca_dep.h"
+
 #define HCI_MODE 0
 
 /* framing in HCI mode */
@@ -73,7 +75,8 @@ struct st21nfca_hci_info {
 	data_exchange_cb_t async_cb;
 	void *async_cb_context;
 
-} __packed;
+	struct st21nfca_dep_info dep_info;
+};
 
 /* Reader RF commands */
 #define ST21NFCA_WR_XCHG_DATA            0x10
@@ -83,5 +86,26 @@ struct st21nfca_hci_info {
 #define ST21NFCA_RF_READER_F_DATARATE_106 0x01
 #define ST21NFCA_RF_READER_F_DATARATE_212 0x02
 #define ST21NFCA_RF_READER_F_DATARATE_424 0x04
+#define ST21NFCA_RF_READER_F_POL_REQ    0x02
+#define ST21NFCA_RF_READER_F_POL_REQ_DEFAULT    0xffff0000
+#define ST21NFCA_RF_READER_F_NFCID2 0x03
+#define ST21NFCA_RF_READER_F_NFCID1 0x04
+#define ST21NFCA_RF_READER_F_SENS_RES 0x05
+
+#define ST21NFCA_RF_CARD_F_GATE 0x24
+#define ST21NFCA_RF_CARD_F_MODE 0x01
+#define ST21NFCA_RF_CARD_F_NFCID2_LIST 0x04
+#define ST21NFCA_RF_CARD_F_NFCID1 0x05
+#define ST21NFCA_RF_CARD_F_SENS_RES 0x06
+#define ST21NFCA_RF_CARD_F_SEL_RES 0x07
+#define ST21NFCA_RF_CARD_F_DATARATE 0x08
+#define ST21NFCA_RF_CARD_F_DATARATE_106 0x00
+#define ST21NFCA_RF_CARD_F_DATARATE_212_424 0x01
+
+#define ST21NFCA_EVT_SEND_DATA 0x10
+#define ST21NFCA_EVT_FIELD_ON 0x11
+#define ST21NFCA_EVT_CARD_DEACTIVATED 0x12
+#define ST21NFCA_EVT_CARD_ACTIVATED 0x13
+#define ST21NFCA_EVT_FIELD_OFF 0x14
 
 #endif /* __LOCAL_ST21NFCA_H_ */

drivers/nfc/st21nfca/st21nfca_dep.c

@@ -0,0 +1,661 @@
+/*
+ * Copyright (C) 2014  STMicroelectronics SAS. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <net/nfc/hci.h>
+
+#include "st21nfca.h"
+#include "st21nfca_dep.h"
+
+#define ST21NFCA_NFCIP1_INITIATOR 0x00
+#define ST21NFCA_NFCIP1_REQ 0xd4
+#define ST21NFCA_NFCIP1_RES 0xd5
+#define ST21NFCA_NFCIP1_ATR_REQ 0x00
+#define ST21NFCA_NFCIP1_ATR_RES 0x01
+#define ST21NFCA_NFCIP1_PSL_REQ 0x04
+#define ST21NFCA_NFCIP1_PSL_RES 0x05
+#define ST21NFCA_NFCIP1_DEP_REQ 0x06
+#define ST21NFCA_NFCIP1_DEP_RES 0x07
+
+#define ST21NFCA_NFC_DEP_PFB_PNI(pfb)     ((pfb) & 0x03)
+#define ST21NFCA_NFC_DEP_PFB_TYPE(pfb) ((pfb) & 0xE0)
+#define ST21NFCA_NFC_DEP_PFB_IS_TIMEOUT(pfb) \
+				((pfb) & ST21NFCA_NFC_DEP_PFB_TIMEOUT_BIT)
+#define ST21NFCA_NFC_DEP_DID_BIT_SET(pfb) ((pfb) & 0x04)
+#define ST21NFCA_NFC_DEP_NAD_BIT_SET(pfb) ((pfb) & 0x08)
+#define ST21NFCA_NFC_DEP_PFB_TIMEOUT_BIT 0x10
+
+#define ST21NFCA_NFC_DEP_PFB_IS_TIMEOUT(pfb) \
+				((pfb) & ST21NFCA_NFC_DEP_PFB_TIMEOUT_BIT)
+
+#define ST21NFCA_NFC_DEP_PFB_I_PDU          0x00
+#define ST21NFCA_NFC_DEP_PFB_ACK_NACK_PDU   0x40
+#define ST21NFCA_NFC_DEP_PFB_SUPERVISOR_PDU 0x80
+
+#define ST21NFCA_ATR_REQ_MIN_SIZE 17
+#define ST21NFCA_ATR_REQ_MAX_SIZE 65
+#define ST21NFCA_LR_BITS_PAYLOAD_SIZE_254B 0x30
+#define ST21NFCA_GB_BIT  0x02
+
+#define ST21NFCA_EVT_CARD_F_BITRATE 0x16
+#define ST21NFCA_EVT_READER_F_BITRATE 0x13
+#define	ST21NFCA_PSL_REQ_SEND_SPEED(brs) (brs & 0x38)
+#define ST21NFCA_PSL_REQ_RECV_SPEED(brs) (brs & 0x07)
+#define ST21NFCA_PP2LRI(pp) ((pp & 0x30) >> 4)
+#define ST21NFCA_CARD_BITRATE_212 0x01
+#define ST21NFCA_CARD_BITRATE_424 0x02
+
+#define ST21NFCA_DEFAULT_TIMEOUT 0x0a
+
+
+#define PROTOCOL_ERR(req) pr_err("%d: ST21NFCA Protocol error: %s\n", \
+				 __LINE__, req)
+
+struct st21nfca_atr_req {
+	u8 length;
+	u8 cmd0;
+	u8 cmd1;
+	u8 nfcid3[NFC_NFCID3_MAXSIZE];
+	u8 did;
+	u8 bsi;
+	u8 bri;
+	u8 ppi;
+	u8 gbi[0];
+} __packed;
+
+struct st21nfca_atr_res {
+	u8 length;
+	u8 cmd0;
+	u8 cmd1;
+	u8 nfcid3[NFC_NFCID3_MAXSIZE];
+	u8 did;
+	u8 bsi;
+	u8 bri;
+	u8 to;
+	u8 ppi;
+	u8 gbi[0];
+} __packed;
+
+struct st21nfca_psl_req {
+	u8 length;
+	u8 cmd0;
+	u8 cmd1;
+	u8 did;
+	u8 brs;
+	u8 fsl;
+} __packed;
+
+struct st21nfca_psl_res {
+	u8 length;
+	u8 cmd0;
+	u8 cmd1;
+	u8 did;
+} __packed;
+
+struct st21nfca_dep_req_res {
+	u8 length;
+	u8 cmd0;
+	u8 cmd1;
+	u8 pfb;
+	u8 did;
+	u8 nad;
+} __packed;
+
+static void st21nfca_tx_work(struct work_struct *work)
+{
+	struct st21nfca_hci_info *info = container_of(work,
+						struct st21nfca_hci_info,
+						dep_info.tx_work);
+
+	struct nfc_dev *dev;
+	struct sk_buff *skb;
+	if (info) {
+		dev = info->hdev->ndev;
+		skb = info->dep_info.tx_pending;
+
+		device_lock(&dev->dev);
+
+		nfc_hci_send_cmd_async(info->hdev, ST21NFCA_RF_READER_F_GATE,
+							ST21NFCA_WR_XCHG_DATA,
+							skb->data, skb->len,
+							info->async_cb, info);
+		device_unlock(&dev->dev);
+		kfree_skb(skb);
+	}
+}
+
+static void st21nfca_im_send_pdu(struct st21nfca_hci_info *info,
+						struct sk_buff *skb)
+{
+	info->dep_info.tx_pending = skb;
+	schedule_work(&info->dep_info.tx_work);
+}
+
+static int st21nfca_tm_send_atr_res(struct nfc_hci_dev *hdev,
+				    struct st21nfca_atr_req *atr_req)
+{
+	struct st21nfca_atr_res *atr_res;
+	struct sk_buff *skb;
+	size_t gb_len;
+	int r;
+	struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
+
+	gb_len = atr_req->length - sizeof(struct st21nfca_atr_req);
+	skb = alloc_skb(atr_req->length + 1, GFP_KERNEL);
+	if (!skb)
+		return -ENOMEM;
+
+	skb_put(skb, sizeof(struct st21nfca_atr_res));
+
+	atr_res = (struct st21nfca_atr_res *)skb->data;
+	memset(atr_res, 0, sizeof(struct st21nfca_atr_res));
+
+	atr_res->length = atr_req->length + 1;
+	atr_res->cmd0 = ST21NFCA_NFCIP1_RES;
+	atr_res->cmd1 = ST21NFCA_NFCIP1_ATR_RES;
+
+	memcpy(atr_res->nfcid3, atr_req->nfcid3, 6);
+	atr_res->bsi = 0x00;
+	atr_res->bri = 0x00;
+	atr_res->to = ST21NFCA_DEFAULT_TIMEOUT;
+	atr_res->ppi = ST21NFCA_LR_BITS_PAYLOAD_SIZE_254B;
+
+	if (gb_len) {
+		skb_put(skb, gb_len);
+
+		atr_res->ppi |= ST21NFCA_GB_BIT;
+		memcpy(atr_res->gbi, atr_req->gbi, gb_len);
+		r = nfc_set_remote_general_bytes(hdev->ndev, atr_res->gbi,
+						  gb_len);
+		if (r < 0)
+			return r;
+	}
+
+	info->dep_info.curr_nfc_dep_pni = 0;
+
+	return nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE,
+				ST21NFCA_EVT_SEND_DATA, skb->data, skb->len);
+}
+
+static int st21nfca_tm_recv_atr_req(struct nfc_hci_dev *hdev,
+				    struct sk_buff *skb)
+{
+	struct st21nfca_atr_req *atr_req;
+	size_t gb_len;
+	int r;
+
+	skb_trim(skb, skb->len - 1);
+	if (IS_ERR(skb)) {
+		r = PTR_ERR(skb);
+		goto exit;
+	}
+
+	if (!skb->len) {
+		r = -EIO;
+		goto exit;
+	}
+
+	if (skb->len < ST21NFCA_ATR_REQ_MIN_SIZE) {
+		r = -EPROTO;
+		goto exit;
+	}
+
+	atr_req = (struct st21nfca_atr_req *)skb->data;
+
+	r = st21nfca_tm_send_atr_res(hdev, atr_req);
+	if (r)
+		goto exit;
+
+	gb_len = skb->len - sizeof(struct st21nfca_atr_req);
+
+	r = nfc_tm_activated(hdev->ndev, NFC_PROTO_NFC_DEP_MASK,
+			      NFC_COMM_PASSIVE, atr_req->gbi, gb_len);
+	if (r)
+		goto exit;
+
+	r = 0;
+
+exit:
+	return r;
+}
+
+static int st21nfca_tm_send_psl_res(struct nfc_hci_dev *hdev,
+				    struct st21nfca_psl_req *psl_req)
+{
+	struct st21nfca_psl_res *psl_res;
+	struct sk_buff *skb;
+	u8 bitrate[2] = {0, 0};
+
+	int r;
+
+	skb = alloc_skb(sizeof(struct st21nfca_psl_res), GFP_KERNEL);
+	if (!skb)
+		return -ENOMEM;
+	skb_put(skb, sizeof(struct st21nfca_psl_res));
+
+	psl_res = (struct st21nfca_psl_res *)skb->data;
+
+	psl_res->length = sizeof(struct st21nfca_psl_res);
+	psl_res->cmd0 = ST21NFCA_NFCIP1_RES;
+	psl_res->cmd1 = ST21NFCA_NFCIP1_PSL_RES;
+	psl_res->did = psl_req->did;
+
+	r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE,
+				ST21NFCA_EVT_SEND_DATA, skb->data, skb->len);
+
+	/*
+	 * ST21NFCA only support P2P passive.
+	 * PSL_REQ BRS value != 0 has only a meaning to
+	 * change technology to type F.
+	 * We change to BITRATE 424Kbits.
+	 * In other case switch to BITRATE 106Kbits.
+	 */
+	if (ST21NFCA_PSL_REQ_SEND_SPEED(psl_req->brs) &&
+	    ST21NFCA_PSL_REQ_RECV_SPEED(psl_req->brs)) {
+		bitrate[0] = ST21NFCA_CARD_BITRATE_424;
+		bitrate[1] = ST21NFCA_CARD_BITRATE_424;
+	}
+
+	/* Send an event to change bitrate change event to card f */
+	return nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE,
+			ST21NFCA_EVT_CARD_F_BITRATE, bitrate, 2);
+}
+
+static int st21nfca_tm_recv_psl_req(struct nfc_hci_dev *hdev,
+				    struct sk_buff *skb)
+{
+	struct st21nfca_psl_req *psl_req;
+	int r;
+
+	skb_trim(skb, skb->len - 1);
+	if (IS_ERR(skb)) {
+		r = PTR_ERR(skb);
+		skb = NULL;
+		goto exit;
+	}
+
+	if (!skb->len) {
+		r = -EIO;
+		goto exit;
+	}
+
+	psl_req = (struct st21nfca_psl_req *)skb->data;
+
+	if (skb->len < sizeof(struct st21nfca_psl_req)) {
+		r = -EIO;
+		goto exit;
+	}
+
+	r = st21nfca_tm_send_psl_res(hdev, psl_req);
+exit:
+	return r;
+}
+
+int st21nfca_tm_send_dep_res(struct nfc_hci_dev *hdev, struct sk_buff *skb)
+{
+	int r;
+	struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
+
+	*skb_push(skb, 1) = info->dep_info.curr_nfc_dep_pni;
+	*skb_push(skb, 1) = ST21NFCA_NFCIP1_DEP_RES;
+	*skb_push(skb, 1) = ST21NFCA_NFCIP1_RES;
+	*skb_push(skb, 1) = skb->len;
+
+	r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE,
+				ST21NFCA_EVT_SEND_DATA, skb->data, skb->len);
+	kfree_skb(skb);
+
+	return r;
+}
+EXPORT_SYMBOL(st21nfca_tm_send_dep_res);
+
+static int st21nfca_tm_recv_dep_req(struct nfc_hci_dev *hdev,
+				    struct sk_buff *skb)
+{
+	struct st21nfca_dep_req_res *dep_req;
+	u8 size;
+	int r;
+	struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
+
+	skb_trim(skb, skb->len - 1);
+	if (IS_ERR(skb)) {
+		r = PTR_ERR(skb);
+		skb = NULL;
+		goto exit;
+	}
+
+	size = 4;
+
+	dep_req = (struct st21nfca_dep_req_res *)skb->data;
+	if (skb->len < size) {
+		r = -EIO;
+		goto exit;
+	}
+
+	if (ST21NFCA_NFC_DEP_DID_BIT_SET(dep_req->pfb))
+		size++;
+	if (ST21NFCA_NFC_DEP_NAD_BIT_SET(dep_req->pfb))
+		size++;
+
+	if (skb->len < size) {
+		r = -EIO;
+		goto exit;
+	}
+
+	/* Receiving DEP_REQ - Decoding */
+	switch (ST21NFCA_NFC_DEP_PFB_TYPE(dep_req->pfb)) {
+	case ST21NFCA_NFC_DEP_PFB_I_PDU:
+		info->dep_info.curr_nfc_dep_pni =
+				ST21NFCA_NFC_DEP_PFB_PNI(dep_req->pfb);
+		break;
+	case ST21NFCA_NFC_DEP_PFB_ACK_NACK_PDU:
+		pr_err("Received a ACK/NACK PDU\n");
+		break;
+	case ST21NFCA_NFC_DEP_PFB_SUPERVISOR_PDU:
+		pr_err("Received a SUPERVISOR PDU\n");
+		break;
+	}
+
+	if (IS_ERR(skb)) {
+		r = PTR_ERR(skb);
+		skb = NULL;
+		goto exit;
+	}
+
+	skb_pull(skb, size);
+
+	return nfc_tm_data_received(hdev->ndev, skb);
+exit:
+	return r;
+}
+
+int st21nfca_tm_event_send_data(struct nfc_hci_dev *hdev, struct sk_buff *skb,
+				u8 gate)
+{
+	u8 cmd0, cmd1;
+	int r;
+
+	cmd0 = skb->data[1];
+	switch (cmd0) {
+	case ST21NFCA_NFCIP1_REQ:
+		cmd1 = skb->data[2];
+		switch (cmd1) {
+		case ST21NFCA_NFCIP1_ATR_REQ:
+			r = st21nfca_tm_recv_atr_req(hdev, skb);
+			break;
+		case ST21NFCA_NFCIP1_PSL_REQ:
+			r = st21nfca_tm_recv_psl_req(hdev, skb);
+			break;
+		case ST21NFCA_NFCIP1_DEP_REQ:
+			r = st21nfca_tm_recv_dep_req(hdev, skb);
+			break;
+		default:
+			return 1;
+		}
+	default:
+		return 1;
+	}
+	return r;
+}
+EXPORT_SYMBOL(st21nfca_tm_event_send_data);
+
+static void st21nfca_im_send_psl_req(struct nfc_hci_dev *hdev, u8 did, u8 bsi,
+				     u8 bri, u8 lri)
+{
+	struct sk_buff *skb;
+	struct st21nfca_psl_req *psl_req;
+	struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
+
+	skb =
+	    alloc_skb(sizeof(struct st21nfca_psl_req) + 1, GFP_KERNEL);
+	if (!skb)
+		return;
+	skb_reserve(skb, 1);
+
+	skb_put(skb, sizeof(struct st21nfca_psl_req));
+	psl_req = (struct st21nfca_psl_req *) skb->data;
+
+	psl_req->length = sizeof(struct st21nfca_psl_req);
+	psl_req->cmd0 = ST21NFCA_NFCIP1_REQ;
+	psl_req->cmd1 = ST21NFCA_NFCIP1_PSL_REQ;
+	psl_req->did = did;
+	psl_req->brs = (0x30 & bsi << 4) | (bri & 0x03);
+	psl_req->fsl = lri;
+
+	*skb_push(skb, 1) = info->dep_info.to | 0x10;
+
+	st21nfca_im_send_pdu(info, skb);
+
+	kfree_skb(skb);
+}
+
+#define ST21NFCA_CB_TYPE_READER_F 1
+static void st21nfca_im_recv_atr_res_cb(void *context, struct sk_buff *skb,
+					int err)
+{
+	struct st21nfca_hci_info *info = context;
+	struct st21nfca_atr_res *atr_res;
+	int r;
+
+	if (err != 0)
+		return;
+
+	if (IS_ERR(skb))
+		return;
+
+	switch (info->async_cb_type) {
+	case ST21NFCA_CB_TYPE_READER_F:
+		skb_trim(skb, skb->len - 1);
+		atr_res = (struct st21nfca_atr_res *)skb->data;
+		r = nfc_set_remote_general_bytes(info->hdev->ndev,
+				atr_res->gbi,
+				skb->len - sizeof(struct st21nfca_atr_res));
+		if (r < 0)
+			return;
+
+		if (atr_res->to >= 0x0e)
+			info->dep_info.to = 0x0e;
+		else
+			info->dep_info.to = atr_res->to + 1;
+
+		info->dep_info.to |= 0x10;
+
+		r = nfc_dep_link_is_up(info->hdev->ndev, info->dep_info.idx,
+					NFC_COMM_PASSIVE, NFC_RF_INITIATOR);
+		if (r < 0)
+			return;
+
+		info->dep_info.curr_nfc_dep_pni = 0;
+		if (ST21NFCA_PP2LRI(atr_res->ppi) != info->dep_info.lri)
+			st21nfca_im_send_psl_req(info->hdev, atr_res->did,
+						atr_res->bsi, atr_res->bri,
+						ST21NFCA_PP2LRI(atr_res->ppi));
+		break;
+	default:
+		if (err == 0)
+			kfree_skb(skb);
+		break;
+	}
+}
+
+int st21nfca_im_send_atr_req(struct nfc_hci_dev *hdev, u8 *gb, size_t gb_len)
+{
+	struct sk_buff *skb;
+	struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
+	struct st21nfca_atr_req *atr_req;
+	struct nfc_target *target;
+	uint size;
+
+	info->dep_info.to = ST21NFCA_DEFAULT_TIMEOUT;
+	size = ST21NFCA_ATR_REQ_MIN_SIZE + gb_len;
+	if (size > ST21NFCA_ATR_REQ_MAX_SIZE) {
+		PROTOCOL_ERR("14.6.1.1");
+		return -EINVAL;
+	}
+
+	skb =
+	    alloc_skb(sizeof(struct st21nfca_atr_req) + gb_len + 1, GFP_KERNEL);
+	if (!skb)
+		return -ENOMEM;
+
+	skb_reserve(skb, 1);
+
+	skb_put(skb, sizeof(struct st21nfca_atr_req));
+
+	atr_req = (struct st21nfca_atr_req *)skb->data;
+	memset(atr_req, 0, sizeof(struct st21nfca_atr_req));
+
+	atr_req->cmd0 = ST21NFCA_NFCIP1_REQ;
+	atr_req->cmd1 = ST21NFCA_NFCIP1_ATR_REQ;
+	memset(atr_req->nfcid3, 0, NFC_NFCID3_MAXSIZE);
+	target = hdev->ndev->targets;
+
+	if (target->sensf_res)
+		memcpy(atr_req->nfcid3, target->sensf_res,
+				target->sensf_res_len);
+	else
+		get_random_bytes(atr_req->nfcid3, NFC_NFCID3_MAXSIZE);
+
+	atr_req->did = 0x0;
+
+	atr_req->bsi = 0x00;
+	atr_req->bri = 0x00;
+	atr_req->ppi = ST21NFCA_LR_BITS_PAYLOAD_SIZE_254B;
+	if (gb_len) {
+		atr_req->ppi |= ST21NFCA_GB_BIT;
+		memcpy(skb_put(skb, gb_len), gb, gb_len);
+	}
+	atr_req->length = sizeof(struct st21nfca_atr_req) + hdev->gb_len;
+
+	*skb_push(skb, 1) = info->dep_info.to | 0x10; /* timeout */
+
+	info->async_cb_type = ST21NFCA_CB_TYPE_READER_F;
+	info->async_cb_context = info;
+	info->async_cb = st21nfca_im_recv_atr_res_cb;
+	info->dep_info.bri = atr_req->bri;
+	info->dep_info.bsi = atr_req->bsi;
+	info->dep_info.lri = ST21NFCA_PP2LRI(atr_req->ppi);
+
+	return nfc_hci_send_cmd_async(hdev, ST21NFCA_RF_READER_F_GATE,
+				ST21NFCA_WR_XCHG_DATA, skb->data,
+				skb->len, info->async_cb, info);
+}
+EXPORT_SYMBOL(st21nfca_im_send_atr_req);
+
+static void st21nfca_im_recv_dep_res_cb(void *context, struct sk_buff *skb,
+					int err)
+{
+	struct st21nfca_hci_info *info = context;
+	struct st21nfca_dep_req_res *dep_res;
+
+	int size;
+
+	if (err != 0)
+		return;
+
+	if (IS_ERR(skb))
+		return;
+
+	switch (info->async_cb_type) {
+	case ST21NFCA_CB_TYPE_READER_F:
+		dep_res = (struct st21nfca_dep_req_res *)skb->data;
+
+		size = 3;
+		if (skb->len < size)
+			goto exit;
+
+		if (ST21NFCA_NFC_DEP_DID_BIT_SET(dep_res->pfb))
+			size++;
+		if (ST21NFCA_NFC_DEP_NAD_BIT_SET(dep_res->pfb))
+			size++;
+
+		if (skb->len < size)
+			goto exit;
+
+		skb_trim(skb, skb->len - 1);
+
+		/* Receiving DEP_REQ - Decoding */
+		switch (ST21NFCA_NFC_DEP_PFB_TYPE(dep_res->pfb)) {
+		case ST21NFCA_NFC_DEP_PFB_ACK_NACK_PDU:
+			pr_err("Received a ACK/NACK PDU\n");
+		case ST21NFCA_NFC_DEP_PFB_I_PDU:
+			info->dep_info.curr_nfc_dep_pni =
+			    ST21NFCA_NFC_DEP_PFB_PNI(dep_res->pfb + 1);
+			size++;
+			skb_pull(skb, size);
+			nfc_tm_data_received(info->hdev->ndev, skb);
+			break;
+		case ST21NFCA_NFC_DEP_PFB_SUPERVISOR_PDU:
+			pr_err("Received a SUPERVISOR PDU\n");
+			skb_pull(skb, size);
+			*skb_push(skb, 1) = ST21NFCA_NFCIP1_DEP_REQ;
+			*skb_push(skb, 1) = ST21NFCA_NFCIP1_REQ;
+			*skb_push(skb, 1) = skb->len;
+			*skb_push(skb, 1) = info->dep_info.to | 0x10;
+
+			st21nfca_im_send_pdu(info, skb);
+			break;
+		}
+
+		return;
+	default:
+		break;
+	}
+
+exit:
+	if (err == 0)
+		kfree_skb(skb);
+}
+
+int st21nfca_im_send_dep_req(struct nfc_hci_dev *hdev, struct sk_buff *skb)
+{
+	struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
+
+	info->async_cb_type = ST21NFCA_CB_TYPE_READER_F;
+	info->async_cb_context = info;
+	info->async_cb = st21nfca_im_recv_dep_res_cb;
+
+	*skb_push(skb, 1) = info->dep_info.curr_nfc_dep_pni;
+	*skb_push(skb, 1) = ST21NFCA_NFCIP1_DEP_REQ;
+	*skb_push(skb, 1) = ST21NFCA_NFCIP1_REQ;
+	*skb_push(skb, 1) = skb->len;
+
+	*skb_push(skb, 1) = info->dep_info.to | 0x10;
+
+	return nfc_hci_send_cmd_async(hdev, ST21NFCA_RF_READER_F_GATE,
+				      ST21NFCA_WR_XCHG_DATA,
+				      skb->data, skb->len,
+				      info->async_cb, info);
+}
+EXPORT_SYMBOL(st21nfca_im_send_dep_req);
+
+void st21nfca_dep_init(struct nfc_hci_dev *hdev)
+{
+	struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
+
+	INIT_WORK(&info->dep_info.tx_work, st21nfca_tx_work);
+	info->dep_info.curr_nfc_dep_pni = 0;
+	info->dep_info.idx = 0;
+	info->dep_info.to = ST21NFCA_DEFAULT_TIMEOUT;
+}
+EXPORT_SYMBOL(st21nfca_dep_init);
+
+void st21nfca_dep_deinit(struct nfc_hci_dev *hdev)
+{
+	struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
+
+	cancel_work_sync(&info->dep_info.tx_work);
+}
+EXPORT_SYMBOL(st21nfca_dep_deinit);

drivers/nfc/st21nfca/st21nfca_dep.h

@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2014  STMicroelectronics SAS. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __ST21NFCA_DEP_H
+#define __ST21NFCA_DEP_H
+
+#include <linux/skbuff.h>
+#include <linux/workqueue.h>
+
+struct st21nfca_dep_info {
+	struct sk_buff *tx_pending;
+	struct work_struct tx_work;
+	u8 curr_nfc_dep_pni;
+	u32 idx;
+	u8 to;
+	u8 did;
+	u8 bsi;
+	u8 bri;
+	u8 lri;
+} __packed;
+
+int st21nfca_tm_event_send_data(struct nfc_hci_dev *hdev, struct sk_buff *skb,
+				u8 gate);
+int st21nfca_tm_send_dep_res(struct nfc_hci_dev *hdev, struct sk_buff *skb);
+
+int st21nfca_im_send_atr_req(struct nfc_hci_dev *hdev, u8 *gb, size_t gb_len);
+int st21nfca_im_send_dep_req(struct nfc_hci_dev *hdev, struct sk_buff *skb);
+void st21nfca_dep_init(struct nfc_hci_dev *hdev);
+void st21nfca_dep_deinit(struct nfc_hci_dev *hdev);
+#endif /* __ST21NFCA_DEP_H */

drivers/nfc/st21nfcb/Kconfig

@@ -0,0 +1,22 @@
+config NFC_ST21NFCB
+	tristate "STMicroelectronics ST21NFCB NFC driver"
+	depends on NFC_NCI
+	default n
+	---help---
+	  STMicroelectronics ST21NFCB core driver. It implements the chipset
+	  NCI logic and hooks into the NFC kernel APIs. Physical layers will
+	  register against it.
+
+	  To compile this driver as a module, choose m here. The module will
+	  be called st21nfcb.
+	  Say N if unsure.
+
+config NFC_ST21NFCB_I2C
+	tristate "NFC ST21NFCB i2c support"
+	depends on NFC_ST21NFCB && I2C
+	---help---
+	  This module adds support for the STMicroelectronics st21nfcb i2c interface.
+	  Select this if your platform is using the i2c bus.
+
+	  If you choose to build a module, it'll be called st21nfcb_i2c.
+	  Say N if unsure.

drivers/nfc/st21nfcb/Makefile

@@ -0,0 +1,8 @@
+#
+# Makefile for ST21NFCB NCI based NFC driver
+#
+
+st21nfcb_i2c-objs  = i2c.o
+
+obj-$(CONFIG_NFC_ST21NFCB)     += st21nfcb.o ndlc.o
+obj-$(CONFIG_NFC_ST21NFCB_I2C) += st21nfcb_i2c.o

drivers/nfc/st21nfcb/i2c.c

@@ -0,0 +1,462 @@
+/*
+ * I2C Link Layer for ST21NFCB NCI based Driver
+ * Copyright (C) 2014  STMicroelectronics SAS. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/crc-ccitt.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/gpio.h>
+#include <linux/of_irq.h>
+#include <linux/of_gpio.h>
+#include <linux/miscdevice.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/nfc.h>
+#include <linux/firmware.h>
+#include <linux/unaligned/access_ok.h>
+#include <linux/platform_data/st21nfcb.h>
+
+#include <net/nfc/nci.h>
+#include <net/nfc/llc.h>
+#include <net/nfc/nfc.h>
+
+#include "ndlc.h"
+
+#define DRIVER_DESC "NCI NFC driver for ST21NFCB"
+
+/* ndlc header */
+#define ST21NFCB_FRAME_HEADROOM	1
+#define ST21NFCB_FRAME_TAILROOM 0
+
+#define ST21NFCB_NCI_I2C_MIN_SIZE 4   /* PCB(1) + NCI Packet header(3) */
+#define ST21NFCB_NCI_I2C_MAX_SIZE 250 /* req 4.2.1 */
+
+#define ST21NFCB_NCI_I2C_DRIVER_NAME "st21nfcb_nci_i2c"
+
+static struct i2c_device_id st21nfcb_nci_i2c_id_table[] = {
+	{ST21NFCB_NCI_DRIVER_NAME, 0},
+	{}
+};
+MODULE_DEVICE_TABLE(i2c, st21nfcb_nci_i2c_id_table);
+
+struct st21nfcb_i2c_phy {
+	struct i2c_client *i2c_dev;
+	struct llt_ndlc *ndlc;
+
+	unsigned int gpio_irq;
+	unsigned int gpio_reset;
+	unsigned int irq_polarity;
+
+	int powered;
+
+	/*
+	 * < 0 if hardware error occured (e.g. i2c err)
+	 * and prevents normal operation.
+	 */
+	int hard_fault;
+};
+
+#define I2C_DUMP_SKB(info, skb)					\
+do {								\
+	pr_debug("%s:\n", info);				\
+	print_hex_dump(KERN_DEBUG, "i2c: ", DUMP_PREFIX_OFFSET,	\
+		       16, 1, (skb)->data, (skb)->len, 0);	\
+} while (0)
+
+static int st21nfcb_nci_i2c_enable(void *phy_id)
+{
+	struct st21nfcb_i2c_phy *phy = phy_id;
+
+	gpio_set_value(phy->gpio_reset, 0);
+	usleep_range(10000, 15000);
+	gpio_set_value(phy->gpio_reset, 1);
+	phy->powered = 1;
+	usleep_range(80000, 85000);
+
+	return 0;
+}
+
+static void st21nfcb_nci_i2c_disable(void *phy_id)
+{
+	struct st21nfcb_i2c_phy *phy = phy_id;
+
+	pr_info("\n");
+
+	phy->powered = 0;
+	/* reset chip in order to flush clf */
+	gpio_set_value(phy->gpio_reset, 0);
+	usleep_range(10000, 15000);
+	gpio_set_value(phy->gpio_reset, 1);
+}
+
+static void st21nfcb_nci_remove_header(struct sk_buff *skb)
+{
+	skb_pull(skb, ST21NFCB_FRAME_HEADROOM);
+}
+
+/*
+ * Writing a frame must not return the number of written bytes.
+ * It must return either zero for success, or <0 for error.
+ * In addition, it must not alter the skb
+ */
+static int st21nfcb_nci_i2c_write(void *phy_id, struct sk_buff *skb)
+{
+	int r = -1;
+	struct st21nfcb_i2c_phy *phy = phy_id;
+	struct i2c_client *client = phy->i2c_dev;
+
+	I2C_DUMP_SKB("st21nfcb_nci_i2c_write", skb);
+
+	if (phy->hard_fault != 0)
+		return phy->hard_fault;
+
+	r = i2c_master_send(client, skb->data, skb->len);
+	if (r == -EREMOTEIO) {  /* Retry, chip was in standby */
+		usleep_range(1000, 4000);
+		r = i2c_master_send(client, skb->data, skb->len);
+	}
+
+	if (r >= 0) {
+		if (r != skb->len)
+			r = -EREMOTEIO;
+		else
+			r = 0;
+	}
+
+	st21nfcb_nci_remove_header(skb);
+
+	return r;
+}
+
+/*
+ * Reads an ndlc frame and returns it in a newly allocated sk_buff.
+ * returns:
+ * frame size : if received frame is complete (find ST21NFCB_SOF_EOF at
+ * end of read)
+ * -EAGAIN : if received frame is incomplete (not find ST21NFCB_SOF_EOF
+ * at end of read)
+ * -EREMOTEIO : i2c read error (fatal)
+ * -EBADMSG : frame was incorrect and discarded
+ * (value returned from st21nfcb_nci_i2c_repack)
+ * -EIO : if no ST21NFCB_SOF_EOF is found after reaching
+ * the read length end sequence
+ */
+static int st21nfcb_nci_i2c_read(struct st21nfcb_i2c_phy *phy,
+				 struct sk_buff **skb)
+{
+	int r;
+	u8 len;
+	u8 buf[ST21NFCB_NCI_I2C_MAX_SIZE];
+	struct i2c_client *client = phy->i2c_dev;
+
+	r = i2c_master_recv(client, buf, ST21NFCB_NCI_I2C_MIN_SIZE);
+	if (r == -EREMOTEIO) {  /* Retry, chip was in standby */
+		usleep_range(1000, 4000);
+		r = i2c_master_recv(client, buf, ST21NFCB_NCI_I2C_MIN_SIZE);
+	} else if (r != ST21NFCB_NCI_I2C_MIN_SIZE) {
+		nfc_err(&client->dev, "cannot read ndlc & nci header\n");
+		return -EREMOTEIO;
+	}
+
+	len = be16_to_cpu(*(__be16 *) (buf + 2));
+	if (len > ST21NFCB_NCI_I2C_MAX_SIZE) {
+		nfc_err(&client->dev, "invalid frame len\n");
+		return -EBADMSG;
+	}
+
+	*skb = alloc_skb(ST21NFCB_NCI_I2C_MIN_SIZE + len, GFP_KERNEL);
+	if (*skb == NULL)
+		return -ENOMEM;
+
+	skb_reserve(*skb, ST21NFCB_NCI_I2C_MIN_SIZE);
+	skb_put(*skb, ST21NFCB_NCI_I2C_MIN_SIZE);
+	memcpy((*skb)->data, buf, ST21NFCB_NCI_I2C_MIN_SIZE);
+
+	if (!len)
+		return 0;
+
+	r = i2c_master_recv(client, buf, len);
+	if (r != len) {
+		kfree_skb(*skb);
+		return -EREMOTEIO;
+	}
+
+	skb_put(*skb, len);
+	memcpy((*skb)->data + ST21NFCB_NCI_I2C_MIN_SIZE, buf, len);
+
+	I2C_DUMP_SKB("i2c frame read", *skb);
+
+	return 0;
+}
+
+/*
+ * Reads an ndlc frame from the chip.
+ *
+ * On ST21NFCB, IRQ goes in idle state when read starts.
+ */
+static irqreturn_t st21nfcb_nci_irq_thread_fn(int irq, void *phy_id)
+{
+	struct st21nfcb_i2c_phy *phy = phy_id;
+	struct i2c_client *client;
+	struct sk_buff *skb = NULL;
+	int r;
+
+	if (!phy || irq != phy->i2c_dev->irq) {
+		WARN_ON_ONCE(1);
+		return IRQ_NONE;
+	}
+
+	client = phy->i2c_dev;
+	dev_dbg(&client->dev, "IRQ\n");
+
+	if (phy->hard_fault)
+		return IRQ_HANDLED;
+
+	if (!phy->powered) {
+		st21nfcb_nci_i2c_disable(phy);
+		return IRQ_HANDLED;
+	}
+
+	r = st21nfcb_nci_i2c_read(phy, &skb);
+	if (r == -EREMOTEIO) {
+		phy->hard_fault = r;
+                ndlc_recv(phy->ndlc, NULL);
+		return IRQ_HANDLED;
+	} else if (r == -ENOMEM || r == -EBADMSG) {
+		return IRQ_HANDLED;
+	}
+
+	ndlc_recv(phy->ndlc, skb);
+
+	return IRQ_HANDLED;
+}
+
+static struct nfc_phy_ops i2c_phy_ops = {
+	.write = st21nfcb_nci_i2c_write,
+	.enable = st21nfcb_nci_i2c_enable,
+	.disable = st21nfcb_nci_i2c_disable,
+};
+
+#ifdef CONFIG_OF
+static int st21nfcb_nci_i2c_of_request_resources(struct i2c_client *client)
+{
+	struct st21nfcb_i2c_phy *phy = i2c_get_clientdata(client);
+	struct device_node *pp;
+	int gpio;
+	int r;
+
+	pp = client->dev.of_node;
+	if (!pp)
+		return -ENODEV;
+
+	/* Get GPIO from device tree */
+	gpio = of_get_named_gpio(pp, "reset-gpios", 0);
+	if (gpio < 0) {
+		nfc_err(&client->dev,
+			"Failed to retrieve reset-gpios from device tree\n");
+		return gpio;
+	}
+
+	/* GPIO request and configuration */
+	r = devm_gpio_request(&client->dev, gpio, "clf_reset");
+	if (r) {
+		nfc_err(&client->dev, "Failed to request reset pin\n");
+		return -ENODEV;
+	}
+
+	r = gpio_direction_output(gpio, 1);
+	if (r) {
+		nfc_err(&client->dev,
+			"Failed to set reset pin direction as output\n");
+		return -ENODEV;
+	}
+	phy->gpio_reset = gpio;
+
+	/* IRQ */
+	r = irq_of_parse_and_map(pp, 0);
+	if (r < 0) {
+		nfc_err(&client->dev,
+				"Unable to get irq, error: %d\n", r);
+		return r;
+	}
+
+	phy->irq_polarity = irq_get_trigger_type(r);
+	client->irq = r;
+
+	return 0;
+}
+#else
+static int st21nfcb_nci_i2c_of_request_resources(struct i2c_client *client)
+{
+	return -ENODEV;
+}
+#endif
+
+static int st21nfcb_nci_i2c_request_resources(struct i2c_client *client)
+{
+	struct st21nfcb_nfc_platform_data *pdata;
+	struct st21nfcb_i2c_phy *phy = i2c_get_clientdata(client);
+	int r;
+	int irq;
+
+	pdata = client->dev.platform_data;
+	if (pdata == NULL) {
+		nfc_err(&client->dev, "No platform data\n");
+		return -EINVAL;
+	}
+
+	/* store for later use */
+	phy->gpio_irq = pdata->gpio_irq;
+	phy->gpio_reset = pdata->gpio_reset;
+	phy->irq_polarity = pdata->irq_polarity;
+
+	r = devm_gpio_request(&client->dev, phy->gpio_irq, "wake_up");
+	if (r) {
+		pr_err("%s : gpio_request failed\n", __FILE__);
+		return -ENODEV;
+	}
+
+	r = gpio_direction_input(phy->gpio_irq);
+	if (r) {
+		pr_err("%s : gpio_direction_input failed\n", __FILE__);
+		return -ENODEV;
+	}
+
+	r = devm_gpio_request(&client->dev,
+			      phy->gpio_reset, "clf_reset");
+	if (r) {
+		pr_err("%s : reset gpio_request failed\n", __FILE__);
+		return -ENODEV;
+	}
+
+	r = gpio_direction_output(phy->gpio_reset, 1);
+	if (r) {
+		pr_err("%s : reset gpio_direction_output failed\n",
+			__FILE__);
+		return -ENODEV;
+	}
+
+	/* IRQ */
+	irq = gpio_to_irq(phy->gpio_irq);
+	if (irq < 0) {
+		nfc_err(&client->dev,
+			"Unable to get irq number for GPIO %d error %d\n",
+			phy->gpio_irq, r);
+		return -ENODEV;
+	}
+	client->irq = irq;
+
+	return 0;
+}
+
+static int st21nfcb_nci_i2c_probe(struct i2c_client *client,
+				  const struct i2c_device_id *id)
+{
+	struct st21nfcb_i2c_phy *phy;
+	struct st21nfcb_nfc_platform_data *pdata;
+	int r;
+
+	dev_dbg(&client->dev, "%s\n", __func__);
+	dev_dbg(&client->dev, "IRQ: %d\n", client->irq);
+
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+		nfc_err(&client->dev, "Need I2C_FUNC_I2C\n");
+		return -ENODEV;
+	}
+
+	phy = devm_kzalloc(&client->dev, sizeof(struct st21nfcb_i2c_phy),
+			   GFP_KERNEL);
+	if (!phy) {
+		nfc_err(&client->dev,
+			"Cannot allocate memory for st21nfcb i2c phy.\n");
+		return -ENOMEM;
+	}
+
+	phy->i2c_dev = client;
+
+	i2c_set_clientdata(client, phy);
+
+	pdata = client->dev.platform_data;
+	if (!pdata && client->dev.of_node) {
+		r = st21nfcb_nci_i2c_of_request_resources(client);
+		if (r) {
+			nfc_err(&client->dev, "No platform data\n");
+			return r;
+		}
+	} else if (pdata) {
+		r = st21nfcb_nci_i2c_request_resources(client);
+		if (r) {
+			nfc_err(&client->dev,
+				"Cannot get platform resources\n");
+			return r;
+		}
+	} else {
+		nfc_err(&client->dev,
+			"st21nfcb platform resources not available\n");
+		return -ENODEV;
+	}
+
+	r = devm_request_threaded_irq(&client->dev, client->irq, NULL,
+				st21nfcb_nci_irq_thread_fn,
+				phy->irq_polarity | IRQF_ONESHOT,
+				ST21NFCB_NCI_DRIVER_NAME, phy);
+	if (r < 0) {
+		nfc_err(&client->dev, "Unable to register IRQ handler\n");
+		return r;
+	}
+
+	return ndlc_probe(phy, &i2c_phy_ops, &client->dev,
+			ST21NFCB_FRAME_HEADROOM, ST21NFCB_FRAME_TAILROOM,
+			&phy->ndlc);
+}
+
+static int st21nfcb_nci_i2c_remove(struct i2c_client *client)
+{
+	struct st21nfcb_i2c_phy *phy = i2c_get_clientdata(client);
+
+	dev_dbg(&client->dev, "%s\n", __func__);
+
+	ndlc_remove(phy->ndlc);
+
+	if (phy->powered)
+		st21nfcb_nci_i2c_disable(phy);
+
+	return 0;
+}
+
+static const struct of_device_id of_st21nfcb_i2c_match[] = {
+	{ .compatible = "st,st21nfcb_i2c", },
+	{}
+};
+
+static struct i2c_driver st21nfcb_nci_i2c_driver = {
+	.driver = {
+		.owner = THIS_MODULE,
+		.name = ST21NFCB_NCI_I2C_DRIVER_NAME,
+		.owner = THIS_MODULE,
+		.of_match_table = of_match_ptr(of_st21nfcb_i2c_match),
+	},
+	.probe = st21nfcb_nci_i2c_probe,
+	.id_table = st21nfcb_nci_i2c_id_table,
+	.remove = st21nfcb_nci_i2c_remove,
+};
+
+module_i2c_driver(st21nfcb_nci_i2c_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION(DRIVER_DESC);

drivers/nfc/st21nfcb/ndlc.c

@@ -0,0 +1,298 @@
+/*
+ * Low Level Transport (NDLC) Driver for STMicroelectronics NFC Chip
+ *
+ * Copyright (C) 2014  STMicroelectronics SAS. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/sched.h>
+#include <net/nfc/nci_core.h>
+
+#include "ndlc.h"
+#include "st21nfcb.h"
+
+#define NDLC_TIMER_T1		100
+#define NDLC_TIMER_T1_WAIT	400
+#define NDLC_TIMER_T2		1200
+
+#define PCB_TYPE_DATAFRAME		0x80
+#define PCB_TYPE_SUPERVISOR		0xc0
+#define PCB_TYPE_MASK			PCB_TYPE_SUPERVISOR
+
+#define PCB_SYNC_ACK			0x20
+#define PCB_SYNC_NACK			0x10
+#define PCB_SYNC_WAIT			0x30
+#define PCB_SYNC_NOINFO			0x00
+#define PCB_SYNC_MASK			PCB_SYNC_WAIT
+
+#define PCB_DATAFRAME_RETRANSMIT_YES	0x00
+#define PCB_DATAFRAME_RETRANSMIT_NO	0x04
+#define PCB_DATAFRAME_RETRANSMIT_MASK	PCB_DATAFRAME_RETRANSMIT_NO
+
+#define PCB_SUPERVISOR_RETRANSMIT_YES	0x00
+#define PCB_SUPERVISOR_RETRANSMIT_NO	0x02
+#define PCB_SUPERVISOR_RETRANSMIT_MASK	PCB_SUPERVISOR_RETRANSMIT_NO
+
+#define PCB_FRAME_CRC_INFO_PRESENT	0x08
+#define PCB_FRAME_CRC_INFO_NOTPRESENT	0x00
+#define PCB_FRAME_CRC_INFO_MASK		PCB_FRAME_CRC_INFO_PRESENT
+
+#define NDLC_DUMP_SKB(info, skb)                                 \
+do {                                                             \
+	pr_debug("%s:\n", info);                                 \
+	print_hex_dump(KERN_DEBUG, "ndlc: ", DUMP_PREFIX_OFFSET, \
+			16, 1, skb->data, skb->len, 0);          \
+} while (0)
+
+int ndlc_open(struct llt_ndlc *ndlc)
+{
+	/* toggle reset pin */
+	ndlc->ops->enable(ndlc->phy_id);
+	return 0;
+}
+EXPORT_SYMBOL(ndlc_open);
+
+void ndlc_close(struct llt_ndlc *ndlc)
+{
+	/* toggle reset pin */
+	ndlc->ops->disable(ndlc->phy_id);
+}
+EXPORT_SYMBOL(ndlc_close);
+
+int ndlc_send(struct llt_ndlc *ndlc, struct sk_buff *skb)
+{
+	/* add ndlc header */
+	u8 pcb = PCB_TYPE_DATAFRAME | PCB_DATAFRAME_RETRANSMIT_NO |
+		PCB_FRAME_CRC_INFO_NOTPRESENT;
+
+	*skb_push(skb, 1) = pcb;
+	skb_queue_tail(&ndlc->send_q, skb);
+
+	schedule_work(&ndlc->sm_work);
+
+	return 0;
+}
+EXPORT_SYMBOL(ndlc_send);
+
+static void llt_ndlc_send_queue(struct llt_ndlc *ndlc)
+{
+	struct sk_buff *skb;
+	int r;
+	unsigned long time_sent;
+
+	if (ndlc->send_q.qlen)
+		pr_debug("sendQlen=%d unackQlen=%d\n",
+			 ndlc->send_q.qlen, ndlc->ack_pending_q.qlen);
+
+	while (ndlc->send_q.qlen) {
+		skb = skb_dequeue(&ndlc->send_q);
+		NDLC_DUMP_SKB("ndlc frame written", skb);
+		r = ndlc->ops->write(ndlc->phy_id, skb);
+		if (r < 0) {
+			ndlc->hard_fault = r;
+			break;
+		}
+		time_sent = jiffies;
+		*(unsigned long *)skb->cb = time_sent;
+
+		skb_queue_tail(&ndlc->ack_pending_q, skb);
+
+		/* start timer t1 for ndlc aknowledge */
+		ndlc->t1_active = true;
+		mod_timer(&ndlc->t1_timer, time_sent +
+			msecs_to_jiffies(NDLC_TIMER_T1));
+	}
+}
+
+static void llt_ndlc_requeue_data_pending(struct llt_ndlc *ndlc)
+{
+	struct sk_buff *skb;
+	u8 pcb;
+
+	while ((skb = skb_dequeue_tail(&ndlc->ack_pending_q))) {
+		pcb = skb->data[0];
+		switch (pcb & PCB_TYPE_MASK) {
+		case PCB_TYPE_SUPERVISOR:
+			skb->data[0] = (pcb & ~PCB_SUPERVISOR_RETRANSMIT_MASK) |
+				PCB_SUPERVISOR_RETRANSMIT_YES;
+			break;
+		case PCB_TYPE_DATAFRAME:
+			skb->data[0] = (pcb & ~PCB_DATAFRAME_RETRANSMIT_MASK) |
+				PCB_DATAFRAME_RETRANSMIT_YES;
+			break;
+		default:
+			pr_err("UNKNOWN Packet Control Byte=%d\n", pcb);
+			kfree_skb(skb);
+			break;
+		}
+		skb_queue_head(&ndlc->send_q, skb);
+	}
+}
+
+static void llt_ndlc_rcv_queue(struct llt_ndlc *ndlc)
+{
+	struct sk_buff *skb;
+	u8 pcb;
+	unsigned long time_sent;
+
+	if (ndlc->rcv_q.qlen)
+		pr_debug("rcvQlen=%d\n", ndlc->rcv_q.qlen);
+
+	while ((skb = skb_dequeue(&ndlc->rcv_q)) != NULL) {
+		pcb = skb->data[0];
+		skb_pull(skb, 1);
+		if ((pcb & PCB_TYPE_MASK) == PCB_TYPE_SUPERVISOR) {
+			switch (pcb & PCB_SYNC_MASK) {
+			case PCB_SYNC_ACK:
+				del_timer_sync(&ndlc->t1_timer);
+				del_timer_sync(&ndlc->t2_timer);
+				ndlc->t2_active = false;
+				ndlc->t1_active = false;
+				break;
+			case PCB_SYNC_NACK:
+				llt_ndlc_requeue_data_pending(ndlc);
+				llt_ndlc_send_queue(ndlc);
+				/* start timer t1 for ndlc aknowledge */
+				time_sent = jiffies;
+				ndlc->t1_active = true;
+				mod_timer(&ndlc->t1_timer, time_sent +
+					msecs_to_jiffies(NDLC_TIMER_T1));
+				break;
+			case PCB_SYNC_WAIT:
+				time_sent = jiffies;
+				ndlc->t1_active = true;
+				mod_timer(&ndlc->t1_timer, time_sent +
+					  msecs_to_jiffies(NDLC_TIMER_T1_WAIT));
+				break;
+			default:
+				pr_err("UNKNOWN Packet Control Byte=%d\n", pcb);
+				kfree_skb(skb);
+				break;
+			}
+		} else {
+			nci_recv_frame(ndlc->ndev, skb);
+		}
+	}
+}
+
+static void llt_ndlc_sm_work(struct work_struct *work)
+{
+	struct llt_ndlc *ndlc = container_of(work, struct llt_ndlc, sm_work);
+
+	llt_ndlc_send_queue(ndlc);
+	llt_ndlc_rcv_queue(ndlc);
+
+	if (ndlc->t1_active && timer_pending(&ndlc->t1_timer) == 0) {
+		pr_debug
+		    ("Handle T1(recv SUPERVISOR) elapsed (T1 now inactive)\n");
+		ndlc->t1_active = false;
+
+		llt_ndlc_requeue_data_pending(ndlc);
+		llt_ndlc_send_queue(ndlc);
+	}
+
+	if (ndlc->t2_active && timer_pending(&ndlc->t2_timer) == 0) {
+		pr_debug("Handle T2(recv DATA) elapsed (T2 now inactive)\n");
+		ndlc->t2_active = false;
+		ndlc->t1_active = false;
+		del_timer_sync(&ndlc->t1_timer);
+
+		ndlc_close(ndlc);
+		ndlc->hard_fault = -EREMOTEIO;
+	}
+}
+
+void ndlc_recv(struct llt_ndlc *ndlc, struct sk_buff *skb)
+{
+	if (skb == NULL) {
+		pr_err("NULL Frame -> link is dead\n");
+		ndlc->hard_fault = -EREMOTEIO;
+		ndlc_close(ndlc);
+	} else {
+		NDLC_DUMP_SKB("incoming frame", skb);
+		skb_queue_tail(&ndlc->rcv_q, skb);
+	}
+
+	schedule_work(&ndlc->sm_work);
+}
+EXPORT_SYMBOL(ndlc_recv);
+
+static void ndlc_t1_timeout(unsigned long data)
+{
+	struct llt_ndlc *ndlc = (struct llt_ndlc *)data;
+
+	pr_debug("\n");
+
+	schedule_work(&ndlc->sm_work);
+}
+
+static void ndlc_t2_timeout(unsigned long data)
+{
+	struct llt_ndlc *ndlc = (struct llt_ndlc *)data;
+
+	pr_debug("\n");
+
+	schedule_work(&ndlc->sm_work);
+}
+
+int ndlc_probe(void *phy_id, struct nfc_phy_ops *phy_ops, struct device *dev,
+	       int phy_headroom, int phy_tailroom, struct llt_ndlc **ndlc_id)
+{
+	struct llt_ndlc *ndlc;
+
+	ndlc = devm_kzalloc(dev, sizeof(struct llt_ndlc), GFP_KERNEL);
+	if (!ndlc) {
+		nfc_err(dev, "Cannot allocate memory for ndlc.\n");
+		return -ENOMEM;
+	}
+	ndlc->ops = phy_ops;
+	ndlc->phy_id = phy_id;
+	ndlc->dev = dev;
+
+	*ndlc_id = ndlc;
+
+	/* start timers */
+	init_timer(&ndlc->t1_timer);
+	ndlc->t1_timer.data = (unsigned long)ndlc;
+	ndlc->t1_timer.function = ndlc_t1_timeout;
+
+	init_timer(&ndlc->t2_timer);
+	ndlc->t2_timer.data = (unsigned long)ndlc;
+	ndlc->t2_timer.function = ndlc_t2_timeout;
+
+	skb_queue_head_init(&ndlc->rcv_q);
+	skb_queue_head_init(&ndlc->send_q);
+	skb_queue_head_init(&ndlc->ack_pending_q);
+
+	INIT_WORK(&ndlc->sm_work, llt_ndlc_sm_work);
+
+	return st21nfcb_nci_probe(ndlc, phy_headroom, phy_tailroom);
+}
+EXPORT_SYMBOL(ndlc_probe);
+
+void ndlc_remove(struct llt_ndlc *ndlc)
+{
+	/* cancel timers */
+	del_timer_sync(&ndlc->t1_timer);
+	del_timer_sync(&ndlc->t2_timer);
+	ndlc->t2_active = false;
+	ndlc->t1_active = false;
+
+	skb_queue_purge(&ndlc->rcv_q);
+	skb_queue_purge(&ndlc->send_q);
+
+	st21nfcb_nci_remove(ndlc->ndev);
+	kfree(ndlc);
+}
+EXPORT_SYMBOL(ndlc_remove);

drivers/nfc/st21nfcb/ndlc.h

@@ -0,0 +1,55 @@
+/*
+ * NCI based Driver for STMicroelectronics NFC Chip
+ *
+ * Copyright (C) 2014  STMicroelectronics SAS. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __LOCAL_NDLC_H_
+#define __LOCAL_NDLC_H_
+
+#include <linux/skbuff.h>
+#include <net/nfc/nfc.h>
+
+/* Low Level Transport description */
+struct llt_ndlc {
+	struct nci_dev *ndev;
+	struct nfc_phy_ops *ops;
+	void *phy_id;
+
+	struct timer_list t1_timer;
+	bool t1_active;
+
+	struct timer_list t2_timer;
+	bool t2_active;
+
+	struct sk_buff_head rcv_q;
+	struct sk_buff_head send_q;
+	struct sk_buff_head ack_pending_q;
+
+	struct work_struct sm_work;
+
+	struct device *dev;
+
+	int hard_fault;
+};
+
+int ndlc_open(struct llt_ndlc *ndlc);
+void ndlc_close(struct llt_ndlc *ndlc);
+int ndlc_send(struct llt_ndlc *ndlc, struct sk_buff *skb);
+void ndlc_recv(struct llt_ndlc *ndlc, struct sk_buff *skb);
+int ndlc_probe(void *phy_id, struct nfc_phy_ops *phy_ops, struct device *dev,
+	int phy_headroom, int phy_tailroom, struct llt_ndlc **ndlc_id);
+void ndlc_remove(struct llt_ndlc *ndlc);
+#endif /* __LOCAL_NDLC_H__ */

drivers/nfc/st21nfcb/st21nfcb.c

@@ -0,0 +1,129 @@
+/*
+ * NCI based Driver for STMicroelectronics NFC Chip
+ *
+ * Copyright (C) 2014  STMicroelectronics SAS. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/module.h>
+#include <linux/nfc.h>
+#include <net/nfc/nci.h>
+#include <net/nfc/nci_core.h>
+
+#include "st21nfcb.h"
+#include "ndlc.h"
+
+#define DRIVER_DESC "NCI NFC driver for ST21NFCB"
+
+static int st21nfcb_nci_open(struct nci_dev *ndev)
+{
+	struct st21nfcb_nci_info *info = nci_get_drvdata(ndev);
+	int r;
+
+	if (test_and_set_bit(ST21NFCB_NCI_RUNNING, &info->flags))
+		return 0;
+
+	r = ndlc_open(info->ndlc);
+	if (r)
+		clear_bit(ST21NFCB_NCI_RUNNING, &info->flags);
+
+	return r;
+}
+
+static int st21nfcb_nci_close(struct nci_dev *ndev)
+{
+	struct st21nfcb_nci_info *info = nci_get_drvdata(ndev);
+
+	if (!test_and_clear_bit(ST21NFCB_NCI_RUNNING, &info->flags))
+		return 0;
+
+	ndlc_close(info->ndlc);
+
+	return 0;
+}
+
+static int st21nfcb_nci_send(struct nci_dev *ndev, struct sk_buff *skb)
+{
+	struct st21nfcb_nci_info *info = nci_get_drvdata(ndev);
+
+	skb->dev = (void *)ndev;
+
+	if (!test_bit(ST21NFCB_NCI_RUNNING, &info->flags))
+		return -EBUSY;
+
+	return ndlc_send(info->ndlc, skb);
+}
+
+static struct nci_ops st21nfcb_nci_ops = {
+	.open = st21nfcb_nci_open,
+	.close = st21nfcb_nci_close,
+	.send = st21nfcb_nci_send,
+};
+
+int st21nfcb_nci_probe(struct llt_ndlc *ndlc, int phy_headroom,
+		       int phy_tailroom)
+{
+	struct st21nfcb_nci_info *info;
+	int r;
+	u32 protocols;
+
+	info = devm_kzalloc(ndlc->dev,
+			sizeof(struct st21nfcb_nci_info), GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+
+	protocols = NFC_PROTO_JEWEL_MASK
+		| NFC_PROTO_MIFARE_MASK
+		| NFC_PROTO_FELICA_MASK
+		| NFC_PROTO_ISO14443_MASK
+		| NFC_PROTO_ISO14443_B_MASK
+		| NFC_PROTO_NFC_DEP_MASK;
+
+	ndlc->ndev = nci_allocate_device(&st21nfcb_nci_ops, protocols,
+					phy_headroom, phy_tailroom);
+	if (!ndlc->ndev) {
+		pr_err("Cannot allocate nfc ndev\n");
+		r = -ENOMEM;
+		goto err_alloc_ndev;
+	}
+	info->ndlc = ndlc;
+
+	nci_set_drvdata(ndlc->ndev, info);
+
+	r = nci_register_device(ndlc->ndev);
+	if (r)
+		goto err_regdev;
+
+	return r;
+err_regdev:
+	nci_free_device(ndlc->ndev);
+
+err_alloc_ndev:
+	kfree(info);
+	return r;
+}
+EXPORT_SYMBOL_GPL(st21nfcb_nci_probe);
+
+void st21nfcb_nci_remove(struct nci_dev *ndev)
+{
+	struct st21nfcb_nci_info *info = nci_get_drvdata(ndev);
+
+	nci_unregister_device(ndev);
+	nci_free_device(ndev);
+	kfree(info);
+}
+EXPORT_SYMBOL_GPL(st21nfcb_nci_remove);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION(DRIVER_DESC);

drivers/nfc/st21nfcb/st21nfcb.h

@@ -0,0 +1,38 @@
+/*
+ * NCI based Driver for STMicroelectronics NFC Chip
+ *
+ * Copyright (C) 2014  STMicroelectronics SAS. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __LOCAL_ST21NFCB_H_
+#define __LOCAL_ST21NFCB_H_
+
+#include <net/nfc/nci_core.h>
+
+#include "ndlc.h"
+
+/* Define private flags: */
+#define ST21NFCB_NCI_RUNNING			1
+
+struct st21nfcb_nci_info {
+	struct llt_ndlc *ndlc;
+	unsigned long flags;
+};
+
+void st21nfcb_nci_remove(struct nci_dev *ndev);
+int st21nfcb_nci_probe(struct llt_ndlc *ndlc, int phy_headroom,
+		int phy_tailroom);
+
+#endif /* __LOCAL_ST21NFCB_H_ */

include/linux/platform_data/st21nfcb.h

@@ -0,0 +1,32 @@
+/*
+ * Driver include for the ST21NFCB NFC chip.
+ *
+ * Copyright (C) 2014  STMicroelectronics SAS. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _ST21NFCB_NCI_H_
+#define _ST21NFCB_NCI_H_
+
+#include <linux/i2c.h>
+
+#define ST21NFCB_NCI_DRIVER_NAME "st21nfcb_nci"
+
+struct st21nfcb_nfc_platform_data {
+	unsigned int gpio_irq;
+	unsigned int gpio_reset;
+	unsigned int irq_polarity;
+};
+
+#endif /* _ST21NFCA_HCI_H_ */

include/net/nfc/digital.h

@@ -49,6 +49,7 @@ enum {
 	NFC_DIGITAL_FRAMING_NFCA_SHORT = 0,
 	NFC_DIGITAL_FRAMING_NFCA_STANDARD,
 	NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A,
+	NFC_DIGITAL_FRAMING_NFCA_ANTICOL_COMPLETE,
 
 	NFC_DIGITAL_FRAMING_NFCA_T1T,
 	NFC_DIGITAL_FRAMING_NFCA_T2T,
@@ -126,6 +127,15 @@ typedef void (*nfc_digital_cmd_complete_t)(struct nfc_digital_dev *ddev,
  *	the NFC-DEP ATR_REQ command through cb. The digital stack deducts the RF
  *	tech by analyzing the SoD of the frame containing the ATR_REQ command.
  *	This is an asynchronous function.
+ * @tg_listen_md: If supported, put the device in automatic listen mode with
+ *	mode detection but without automatic anti-collision. In this mode, the
+ *	device automatically detects the RF technology.  What the actual
+ *	RF technology is can be retrieved by calling @tg_get_rf_tech.
+ *	The digital stack will then perform the appropriate anti-collision
+ *	sequence.  This is an asynchronous function.
+ * @tg_get_rf_tech: Required when @tg_listen_md is supported, unused otherwise.
+ *	Return the RF Technology that was detected by the @tg_listen_md call.
+ *	This is a synchronous function.
  *
  * @switch_rf: Turns device radio on or off. The stack does not call explicitly
  *	switch_rf to turn the radio on. A call to in|tg_configure_hw must turn
@@ -160,6 +170,9 @@ struct nfc_digital_ops {
 			      struct digital_tg_mdaa_params *mdaa_params,
 			      u16 timeout, nfc_digital_cmd_complete_t cb,
 			      void *arg);
+	int (*tg_listen_md)(struct nfc_digital_dev *ddev, u16 timeout,
+			    nfc_digital_cmd_complete_t cb, void *arg);
+	int (*tg_get_rf_tech)(struct nfc_digital_dev *ddev, u8 *rf_tech);
 
 	int (*switch_rf)(struct nfc_digital_dev *ddev, bool on);
 	void (*abort_cmd)(struct nfc_digital_dev *ddev);

include/net/nfc/hci.h

@@ -37,6 +37,7 @@ struct nfc_hci_ops {
 	int (*xmit) (struct nfc_hci_dev *hdev, struct sk_buff *skb);
 	int (*start_poll) (struct nfc_hci_dev *hdev,
 			   u32 im_protocols, u32 tm_protocols);
+	void (*stop_poll) (struct nfc_hci_dev *hdev);
 	int (*dep_link_up)(struct nfc_hci_dev *hdev, struct nfc_target *target,
 			   u8 comm_mode, u8 *gb, size_t gb_len);
 	int (*dep_link_down)(struct nfc_hci_dev *hdev);

net/nfc/digital.h

@@ -29,6 +29,7 @@
 #define DIGITAL_CMD_TG_SEND        1
 #define DIGITAL_CMD_TG_LISTEN      2
 #define DIGITAL_CMD_TG_LISTEN_MDAA 3
+#define DIGITAL_CMD_TG_LISTEN_MD   4
 
 #define DIGITAL_MAX_HEADER_LEN 7
 #define DIGITAL_CRC_LEN        2
@@ -121,6 +122,8 @@ int digital_tg_send_dep_res(struct nfc_digital_dev *ddev, struct sk_buff *skb);
 
 int digital_tg_listen_nfca(struct nfc_digital_dev *ddev, u8 rf_tech);
 int digital_tg_listen_nfcf(struct nfc_digital_dev *ddev, u8 rf_tech);
+void digital_tg_recv_md_req(struct nfc_digital_dev *ddev, void *arg,
+			    struct sk_buff *resp);
 
 typedef u16 (*crc_func_t)(u16, const u8 *, size_t);
 

net/nfc/digital_core.c

@@ -201,6 +201,11 @@ static void digital_wq_cmd(struct work_struct *work)
 					       digital_send_cmd_complete, cmd);
 		break;
 
+	case DIGITAL_CMD_TG_LISTEN_MD:
+		rc = ddev->ops->tg_listen_md(ddev, cmd->timeout,
+					       digital_send_cmd_complete, cmd);
+		break;
+
 	default:
 		pr_err("Unknown cmd type %d\n", cmd->type);
 		return;
@@ -293,12 +298,19 @@ static int digital_tg_listen_mdaa(struct nfc_digital_dev *ddev, u8 rf_tech)
 				500, digital_tg_recv_atr_req, NULL);
 }
 
+static int digital_tg_listen_md(struct nfc_digital_dev *ddev, u8 rf_tech)
+{
+	return digital_send_cmd(ddev, DIGITAL_CMD_TG_LISTEN_MD, NULL, NULL, 500,
+				digital_tg_recv_md_req, NULL);
+}
+
 int digital_target_found(struct nfc_digital_dev *ddev,
 			 struct nfc_target *target, u8 protocol)
 {
 	int rc;
 	u8 framing;
 	u8 rf_tech;
+	u8 poll_tech_count;
 	int (*check_crc)(struct sk_buff *skb);
 	void (*add_crc)(struct sk_buff *skb);
 
@@ -375,12 +387,16 @@ int digital_target_found(struct nfc_digital_dev *ddev,
 		return rc;
 
 	target->supported_protocols = (1 << protocol);
-	rc = nfc_targets_found(ddev->nfc_dev, target, 1);
-	if (rc)
-		return rc;
 
+	poll_tech_count = ddev->poll_tech_count;
 	ddev->poll_tech_count = 0;
 
+	rc = nfc_targets_found(ddev->nfc_dev, target, 1);
+	if (rc) {
+		ddev->poll_tech_count = poll_tech_count;
+		return rc;
+	}
+
 	return 0;
 }
 
@@ -505,6 +521,9 @@ static int digital_start_poll(struct nfc_dev *nfc_dev, __u32 im_protocols,
 		if (ddev->ops->tg_listen_mdaa) {
 			digital_add_poll_tech(ddev, 0,
 					      digital_tg_listen_mdaa);
+		} else if (ddev->ops->tg_listen_md) {
+			digital_add_poll_tech(ddev, 0,
+					      digital_tg_listen_md);
 		} else {
 			digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_106A,
 					      digital_tg_listen_nfca);
@@ -732,7 +751,7 @@ struct nfc_digital_dev *nfc_digital_allocate_device(struct nfc_digital_ops *ops,
 
 	if (!ops->in_configure_hw || !ops->in_send_cmd || !ops->tg_listen ||
 	    !ops->tg_configure_hw || !ops->tg_send_cmd || !ops->abort_cmd ||
-	    !ops->switch_rf)
+	    !ops->switch_rf || (ops->tg_listen_md && !ops->tg_get_rf_tech))
 		return NULL;
 
 	ddev = kzalloc(sizeof(struct nfc_digital_dev), GFP_KERNEL);

net/nfc/digital_dep.c

@@ -673,6 +673,7 @@ void digital_tg_recv_atr_req(struct nfc_digital_dev *ddev, void *arg,
 	int rc;
 	struct digital_atr_req *atr_req;
 	size_t gb_len, min_size;
+	u8 poll_tech_count;
 
 	if (IS_ERR(resp)) {
 		rc = PTR_ERR(resp);
@@ -730,12 +731,16 @@ void digital_tg_recv_atr_req(struct nfc_digital_dev *ddev, void *arg,
 		goto exit;
 
 	gb_len = resp->len - sizeof(struct digital_atr_req);
+
+	poll_tech_count = ddev->poll_tech_count;
+	ddev->poll_tech_count = 0;
+
 	rc = nfc_tm_activated(ddev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
 			      NFC_COMM_PASSIVE, atr_req->gb, gb_len);
-	if (rc)
+	if (rc) {
+		ddev->poll_tech_count = poll_tech_count;
 		goto exit;
-
-	ddev->poll_tech_count = 0;
+	}
 
 	rc = 0;
 exit:

net/nfc/digital_technology.c

@@ -318,6 +318,8 @@ static void digital_in_recv_sel_res(struct nfc_digital_dev *ddev, void *arg,
 
 	if (DIGITAL_SEL_RES_IS_T2T(sel_res)) {
 		nfc_proto = NFC_PROTO_MIFARE;
+	} else if (DIGITAL_SEL_RES_IS_NFC_DEP(sel_res)) {
+		nfc_proto = NFC_PROTO_NFC_DEP;
 	} else if (DIGITAL_SEL_RES_IS_T4T(sel_res)) {
 		rc = digital_in_send_rats(ddev, target);
 		if (rc)
@@ -327,8 +329,6 @@ static void digital_in_recv_sel_res(struct nfc_digital_dev *ddev, void *arg,
 		 * done when receiving the ATS
 		 */
 		goto exit_free_skb;
-	} else if (DIGITAL_SEL_RES_IS_NFC_DEP(sel_res)) {
-		nfc_proto = NFC_PROTO_NFC_DEP;
 	} else {
 		rc = -EOPNOTSUPP;
 		goto exit;
@@ -944,6 +944,13 @@ static int digital_tg_send_sel_res(struct nfc_digital_dev *ddev)
 	if (!DIGITAL_DRV_CAPS_TG_CRC(ddev))
 		digital_skb_add_crc_a(skb);
 
+	rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
+				     NFC_DIGITAL_FRAMING_NFCA_ANTICOL_COMPLETE);
+	if (rc) {
+		kfree_skb(skb);
+		return rc;
+	}
+
 	rc = digital_tg_send_cmd(ddev, skb, 300, digital_tg_recv_atr_req,
 				 NULL);
 	if (rc)
@@ -1002,6 +1009,13 @@ static int digital_tg_send_sdd_res(struct nfc_digital_dev *ddev)
 	for (i = 0; i < 4; i++)
 		sdd_res->bcc ^= sdd_res->nfcid1[i];
 
+	rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
+				NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A);
+	if (rc) {
+		kfree_skb(skb);
+		return rc;
+	}
+
 	rc = digital_tg_send_cmd(ddev, skb, 300, digital_tg_recv_sel_req,
 				 NULL);
 	if (rc)
@@ -1054,6 +1068,13 @@ static int digital_tg_send_sens_res(struct nfc_digital_dev *ddev)
 	sens_res[0] = (DIGITAL_SENS_RES_NFC_DEP >> 8) & 0xFF;
 	sens_res[1] = DIGITAL_SENS_RES_NFC_DEP & 0xFF;
 
+	rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
+				     NFC_DIGITAL_FRAMING_NFCA_STANDARD);
+	if (rc) {
+		kfree_skb(skb);
+		return rc;
+	}
+
 	rc = digital_tg_send_cmd(ddev, skb, 300, digital_tg_recv_sdd_req,
 				 NULL);
 	if (rc)
@@ -1197,33 +1218,48 @@ exit:
 	dev_kfree_skb(resp);
 }
 
-int digital_tg_listen_nfca(struct nfc_digital_dev *ddev, u8 rf_tech)
+static int digital_tg_config_nfca(struct nfc_digital_dev *ddev)
 {
 	int rc;
 
-	rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, rf_tech);
+	rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH,
+				     NFC_DIGITAL_RF_TECH_106A);
 	if (rc)
 		return rc;
 
-	rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
-				     NFC_DIGITAL_FRAMING_NFCA_NFC_DEP);
+	return digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
+				       NFC_DIGITAL_FRAMING_NFCA_NFC_DEP);
+}
+
+int digital_tg_listen_nfca(struct nfc_digital_dev *ddev, u8 rf_tech)
+{
+	int rc;
+
+	rc = digital_tg_config_nfca(ddev);
 	if (rc)
 		return rc;
 
 	return digital_tg_listen(ddev, 300, digital_tg_recv_sens_req, NULL);
 }
 
-int digital_tg_listen_nfcf(struct nfc_digital_dev *ddev, u8 rf_tech)
+static int digital_tg_config_nfcf(struct nfc_digital_dev *ddev, u8 rf_tech)
 {
 	int rc;
-	u8 *nfcid2;
 
 	rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, rf_tech);
 	if (rc)
 		return rc;
 
-	rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
-				     NFC_DIGITAL_FRAMING_NFCF_NFC_DEP);
+	return digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
+				       NFC_DIGITAL_FRAMING_NFCF_NFC_DEP);
+}
+
+int digital_tg_listen_nfcf(struct nfc_digital_dev *ddev, u8 rf_tech)
+{
+	int rc;
+	u8 *nfcid2;
+
+	rc = digital_tg_config_nfcf(ddev, rf_tech);
 	if (rc)
 		return rc;
 
@@ -1237,3 +1273,43 @@ int digital_tg_listen_nfcf(struct nfc_digital_dev *ddev, u8 rf_tech)
 
 	return digital_tg_listen(ddev, 300, digital_tg_recv_sensf_req, nfcid2);
 }
+
+void digital_tg_recv_md_req(struct nfc_digital_dev *ddev, void *arg,
+			    struct sk_buff *resp)
+{
+	u8 rf_tech;
+	int rc;
+
+	if (IS_ERR(resp)) {
+		resp = NULL;
+		goto exit_free_skb;
+	}
+
+	rc = ddev->ops->tg_get_rf_tech(ddev, &rf_tech);
+	if (rc)
+		goto exit_free_skb;
+
+	switch (rf_tech) {
+	case NFC_DIGITAL_RF_TECH_106A:
+		rc = digital_tg_config_nfca(ddev);
+		if (rc)
+			goto exit_free_skb;
+		digital_tg_recv_sens_req(ddev, arg, resp);
+		break;
+	case NFC_DIGITAL_RF_TECH_212F:
+	case NFC_DIGITAL_RF_TECH_424F:
+		rc = digital_tg_config_nfcf(ddev, rf_tech);
+		if (rc)
+			goto exit_free_skb;
+		digital_tg_recv_sensf_req(ddev, arg, resp);
+		break;
+	default:
+		goto exit_free_skb;
+	}
+
+	return;
+
+exit_free_skb:
+	digital_poll_next_tech(ddev);
+	dev_kfree_skb(resp);
+}

net/nfc/hci/core.c

@@ -553,8 +553,11 @@ static void hci_stop_poll(struct nfc_dev *nfc_dev)
 {
 	struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
 
-	nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE,
-			   NFC_HCI_EVT_END_OPERATION, NULL, 0);
+	if (hdev->ops->stop_poll)
+		hdev->ops->stop_poll(hdev);
+	else
+		nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE,
+				   NFC_HCI_EVT_END_OPERATION, NULL, 0);
 }
 
 static int hci_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,

net/nfc/nci/ntf.c

@@ -166,7 +166,9 @@ static int nci_add_new_protocol(struct nci_dev *ndev,
 	struct rf_tech_specific_params_nfcf_poll *nfcf_poll;
 	__u32 protocol;
 
-	if (rf_protocol == NCI_RF_PROTOCOL_T2T)
+	if (rf_protocol == NCI_RF_PROTOCOL_T1T)
+		protocol = NFC_PROTO_JEWEL_MASK;
+	else if (rf_protocol == NCI_RF_PROTOCOL_T2T)
 		protocol = NFC_PROTO_MIFARE_MASK;
 	else if (rf_protocol == NCI_RF_PROTOCOL_ISO_DEP)
 		if (rf_tech_and_mode == NCI_NFC_A_PASSIVE_POLL_MODE)