NFC: Separate pn544 hci driver in HW dependant and independant parts

The driver now has all HCI stuff isolated in one file, and all the
hardware link specifics in another. Writing a pn544 driver on top of
another hardware link is now just a matter of adding a new file for that
new hardware specifics.

Signed-off-by: Eric Lapuyade <eric.lapuyade@intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 862 insertions, 0 deletions

diff --git a/drivers/nfc/pn544/pn544.c b/drivers/nfc/pn544/pn544.c
new file mode 100644
index 000000000000..cf344450815c
--- /dev/null
+++ b/drivers/nfc/pn544/pn544.c
@@ -0,0 +1,862 @@
+/*
+ * HCI based Driver for NXP PN544 NFC Chip
+ *
+ * Copyright (C) 2012  Intel Corporation. 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, write to the
+ * Free Software Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <linux/delay.h>
+#include <linux/slab.h>
+
+#include <linux/nfc.h>
+#include <net/nfc/hci.h>
+#include <net/nfc/llc.h>
+
+#include "pn544.h"
+
+/* Timing restrictions (ms) */
+#define PN544_HCI_RESETVEN_TIME		30
+
+#define HCI_MODE 0
+#define FW_MODE 1
+
+enum pn544_state {
+	PN544_ST_COLD,
+	PN544_ST_FW_READY,
+	PN544_ST_READY,
+};
+
+#define FULL_VERSION_LEN 11
+
+/* Proprietary commands */
+#define PN544_WRITE		0x3f
+
+/* Proprietary gates, events, commands and registers */
+
+/* NFC_HCI_RF_READER_A_GATE additional registers and commands */
+#define PN544_RF_READER_A_AUTO_ACTIVATION			0x10
+#define PN544_RF_READER_A_CMD_CONTINUE_ACTIVATION		0x12
+#define PN544_MIFARE_CMD					0x21
+
+/* Commands that apply to all RF readers */
+#define PN544_RF_READER_CMD_PRESENCE_CHECK	0x30
+#define PN544_RF_READER_CMD_ACTIVATE_NEXT	0x32
+
+/* NFC_HCI_ID_MGMT_GATE additional registers */
+#define PN544_ID_MGMT_FULL_VERSION_SW		0x10
+
+#define PN544_RF_READER_ISO15693_GATE		0x12
+
+#define PN544_RF_READER_F_GATE			0x14
+#define PN544_FELICA_ID				0x04
+#define PN544_FELICA_RAW			0x20
+
+#define PN544_RF_READER_JEWEL_GATE		0x15
+#define PN544_JEWEL_RAW_CMD			0x23
+
+#define PN544_RF_READER_NFCIP1_INITIATOR_GATE	0x30
+#define PN544_RF_READER_NFCIP1_TARGET_GATE	0x31
+
+#define PN544_SYS_MGMT_GATE			0x90
+#define PN544_SYS_MGMT_INFO_NOTIFICATION	0x02
+
+#define PN544_POLLING_LOOP_MGMT_GATE		0x94
+#define PN544_DEP_MODE				0x01
+#define PN544_DEP_ATR_REQ			0x02
+#define PN544_DEP_ATR_RES			0x03
+#define PN544_DEP_MERGE				0x0D
+#define PN544_PL_RDPHASES			0x06
+#define PN544_PL_EMULATION			0x07
+#define PN544_PL_NFCT_DEACTIVATED		0x09
+
+#define PN544_SWP_MGMT_GATE			0xA0
+
+#define PN544_NFC_WI_MGMT_GATE			0xA1
+
+#define PN544_HCI_EVT_SND_DATA			0x01
+#define PN544_HCI_EVT_ACTIVATED			0x02
+#define PN544_HCI_EVT_DEACTIVATED		0x03
+#define PN544_HCI_EVT_RCV_DATA			0x04
+#define PN544_HCI_EVT_CONTINUE_MI		0x05
+
+#define PN544_HCI_CMD_ATTREQUEST		0x12
+#define PN544_HCI_CMD_CONTINUE_ACTIVATION	0x13
+
+static struct nfc_hci_gate pn544_gates[] = {
+	{NFC_HCI_ADMIN_GATE, NFC_HCI_INVALID_PIPE},
+	{NFC_HCI_LOOPBACK_GATE, NFC_HCI_INVALID_PIPE},
+	{NFC_HCI_ID_MGMT_GATE, NFC_HCI_INVALID_PIPE},
+	{NFC_HCI_LINK_MGMT_GATE, NFC_HCI_INVALID_PIPE},
+	{NFC_HCI_RF_READER_B_GATE, NFC_HCI_INVALID_PIPE},
+	{NFC_HCI_RF_READER_A_GATE, NFC_HCI_INVALID_PIPE},
+	{PN544_SYS_MGMT_GATE, NFC_HCI_INVALID_PIPE},
+	{PN544_SWP_MGMT_GATE, NFC_HCI_INVALID_PIPE},
+	{PN544_POLLING_LOOP_MGMT_GATE, NFC_HCI_INVALID_PIPE},
+	{PN544_NFC_WI_MGMT_GATE, NFC_HCI_INVALID_PIPE},
+	{PN544_RF_READER_F_GATE, NFC_HCI_INVALID_PIPE},
+	{PN544_RF_READER_JEWEL_GATE, NFC_HCI_INVALID_PIPE},
+	{PN544_RF_READER_ISO15693_GATE, NFC_HCI_INVALID_PIPE},
+	{PN544_RF_READER_NFCIP1_INITIATOR_GATE, NFC_HCI_INVALID_PIPE},
+	{PN544_RF_READER_NFCIP1_TARGET_GATE, NFC_HCI_INVALID_PIPE}
+};
+
+/* Largest headroom needed for outgoing custom commands */
+#define PN544_CMDS_HEADROOM	2
+
+struct pn544_hci_info {
+	struct nfc_phy_ops *phy_ops;
+	void *phy_id;
+
+	struct nfc_hci_dev *hdev;
+
+	enum pn544_state state;
+
+	struct mutex info_lock;
+
+	int async_cb_type;
+	data_exchange_cb_t async_cb;
+	void *async_cb_context;
+};
+
+static int pn544_hci_open(struct nfc_hci_dev *hdev)
+{
+	struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev);
+	int r = 0;
+
+	mutex_lock(&info->info_lock);
+
+	if (info->state != PN544_ST_COLD) {
+		r = -EBUSY;
+		goto out;
+	}
+
+	r = info->phy_ops->enable(info->phy_id);
+
+	if (r == 0)
+		info->state = PN544_ST_READY;
+
+out:
+	mutex_unlock(&info->info_lock);
+	return r;
+}
+
+static void pn544_hci_close(struct nfc_hci_dev *hdev)
+{
+	struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev);
+
+	mutex_lock(&info->info_lock);
+
+	if (info->state == PN544_ST_COLD)
+		goto out;
+
+	info->phy_ops->disable(info->phy_id);
+
+	info->state = PN544_ST_COLD;
+
+out:
+	mutex_unlock(&info->info_lock);
+}
+
+static int pn544_hci_ready(struct nfc_hci_dev *hdev)
+{
+	struct sk_buff *skb;
+	static struct hw_config {
+		u8 adr[2];
+		u8 value;
+	} hw_config[] = {
+		{{0x9f, 0x9a}, 0x00},
+
+		{{0x98, 0x10}, 0xbc},
+
+		{{0x9e, 0x71}, 0x00},
+
+		{{0x98, 0x09}, 0x00},
+
+		{{0x9e, 0xb4}, 0x00},
+
+		{{0x9e, 0xd9}, 0xff},
+		{{0x9e, 0xda}, 0xff},
+		{{0x9e, 0xdb}, 0x23},
+		{{0x9e, 0xdc}, 0x21},
+		{{0x9e, 0xdd}, 0x22},
+		{{0x9e, 0xde}, 0x24},
+
+		{{0x9c, 0x01}, 0x08},
+
+		{{0x9e, 0xaa}, 0x01},
+
+		{{0x9b, 0xd1}, 0x0d},
+		{{0x9b, 0xd2}, 0x24},
+		{{0x9b, 0xd3}, 0x0a},
+		{{0x9b, 0xd4}, 0x22},
+		{{0x9b, 0xd5}, 0x08},
+		{{0x9b, 0xd6}, 0x1e},
+		{{0x9b, 0xdd}, 0x1c},
+
+		{{0x9b, 0x84}, 0x13},
+		{{0x99, 0x81}, 0x7f},
+		{{0x99, 0x31}, 0x70},
+
+		{{0x98, 0x00}, 0x3f},
+
+		{{0x9f, 0x09}, 0x00},
+
+		{{0x9f, 0x0a}, 0x05},
+
+		{{0x9e, 0xd1}, 0xa1},
+		{{0x99, 0x23}, 0x00},
+
+		{{0x9e, 0x74}, 0x80},
+
+		{{0x9f, 0x28}, 0x10},
+
+		{{0x9f, 0x35}, 0x14},
+
+		{{0x9f, 0x36}, 0x60},
+
+		{{0x9c, 0x31}, 0x00},
+
+		{{0x9c, 0x32}, 0xc8},
+
+		{{0x9c, 0x19}, 0x40},
+
+		{{0x9c, 0x1a}, 0x40},
+
+		{{0x9c, 0x0c}, 0x00},
+
+		{{0x9c, 0x0d}, 0x00},
+
+		{{0x9c, 0x12}, 0x00},
+
+		{{0x9c, 0x13}, 0x00},
+
+		{{0x98, 0xa2}, 0x0e},
+
+		{{0x98, 0x93}, 0x40},
+
+		{{0x98, 0x7d}, 0x02},
+		{{0x98, 0x7e}, 0x00},
+		{{0x9f, 0xc8}, 0x01},
+	};
+	struct hw_config *p = hw_config;
+	int count = ARRAY_SIZE(hw_config);
+	struct sk_buff *res_skb;
+	u8 param[4];
+	int r;
+
+	param[0] = 0;
+	while (count--) {
+		param[1] = p->adr[0];
+		param[2] = p->adr[1];
+		param[3] = p->value;
+
+		r = nfc_hci_send_cmd(hdev, PN544_SYS_MGMT_GATE, PN544_WRITE,
+				     param, 4, &res_skb);
+		if (r < 0)
+			return r;
+
+		if (res_skb->len != 1) {
+			kfree_skb(res_skb);
+			return -EPROTO;
+		}
+
+		if (res_skb->data[0] != p->value) {
+			kfree_skb(res_skb);
+			return -EIO;
+		}
+
+		kfree_skb(res_skb);
+
+		p++;
+	}
+
+	param[0] = NFC_HCI_UICC_HOST_ID;
+	r = nfc_hci_set_param(hdev, NFC_HCI_ADMIN_GATE,
+			      NFC_HCI_ADMIN_WHITELIST, param, 1);
+	if (r < 0)
+		return r;
+
+	param[0] = 0x3d;
+	r = nfc_hci_set_param(hdev, PN544_SYS_MGMT_GATE,
+			      PN544_SYS_MGMT_INFO_NOTIFICATION, param, 1);
+	if (r < 0)
+		return r;
+
+	param[0] = 0x0;
+	r = nfc_hci_set_param(hdev, NFC_HCI_RF_READER_A_GATE,
+			      PN544_RF_READER_A_AUTO_ACTIVATION, param, 1);
+	if (r < 0)
+		return r;
+
+	r = nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE,
+			       NFC_HCI_EVT_END_OPERATION, NULL, 0);
+	if (r < 0)
+		return r;
+
+	param[0] = 0x1;
+	r = nfc_hci_set_param(hdev, PN544_POLLING_LOOP_MGMT_GATE,
+			      PN544_PL_NFCT_DEACTIVATED, param, 1);
+	if (r < 0)
+		return r;
+
+	param[0] = 0x0;
+	r = nfc_hci_set_param(hdev, PN544_POLLING_LOOP_MGMT_GATE,
+			      PN544_PL_RDPHASES, param, 1);
+	if (r < 0)
+		return r;
+
+	r = nfc_hci_get_param(hdev, NFC_HCI_ID_MGMT_GATE,
+			      PN544_ID_MGMT_FULL_VERSION_SW, &skb);
+	if (r < 0)
+		return r;
+
+	if (skb->len != FULL_VERSION_LEN) {
+		kfree_skb(skb);
+		return -EINVAL;
+	}
+
+	print_hex_dump(KERN_DEBUG, "FULL VERSION SOFTWARE INFO: ",
+		       DUMP_PREFIX_NONE, 16, 1,
+		       skb->data, FULL_VERSION_LEN, false);
+
+	kfree_skb(skb);
+
+	return 0;
+}
+
+static int pn544_hci_xmit(struct nfc_hci_dev *hdev, struct sk_buff *skb)
+{
+	struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev);
+
+	return info->phy_ops->write(info->phy_id, skb);
+}
+
+static int pn544_hci_start_poll(struct nfc_hci_dev *hdev,
+				u32 im_protocols, u32 tm_protocols)
+{
+	u8 phases = 0;
+	int r;
+	u8 duration[2];
+	u8 activated;
+	u8 i_mode = 0x3f; /* Enable all supported modes */
+	u8 t_mode = 0x0f;
+	u8 t_merge = 0x01; /* Enable merge by default */
+
+	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);
+	if (r < 0)
+		return r;
+
+	duration[0] = 0x18;
+	duration[1] = 0x6a;
+	r = nfc_hci_set_param(hdev, PN544_POLLING_LOOP_MGMT_GATE,
+			      PN544_PL_EMULATION, duration, 2);
+	if (r < 0)
+		return r;
+
+	activated = 0;
+	r = nfc_hci_set_param(hdev, PN544_POLLING_LOOP_MGMT_GATE,
+			      PN544_PL_NFCT_DEACTIVATED, &activated, 1);
+	if (r < 0)
+		return r;
+
+	if (im_protocols & (NFC_PROTO_ISO14443_MASK | NFC_PROTO_MIFARE_MASK |
+			 NFC_PROTO_JEWEL_MASK))
+		phases |= 1;		/* Type A */
+	if (im_protocols & NFC_PROTO_FELICA_MASK) {
+		phases |= (1 << 2);	/* Type F 212 */
+		phases |= (1 << 3);	/* Type F 424 */
+	}
+
+	phases |= (1 << 5);		/* NFC active */
+
+	r = nfc_hci_set_param(hdev, PN544_POLLING_LOOP_MGMT_GATE,
+			      PN544_PL_RDPHASES, &phases, 1);
+	if (r < 0)
+		return r;
+
+	if ((im_protocols | tm_protocols) & NFC_PROTO_NFC_DEP_MASK) {
+		hdev->gb = nfc_get_local_general_bytes(hdev->ndev,
+							&hdev->gb_len);
+		pr_debug("generate local bytes %p", hdev->gb);
+		if (hdev->gb == NULL || hdev->gb_len == 0) {
+			im_protocols &= ~NFC_PROTO_NFC_DEP_MASK;
+			tm_protocols &= ~NFC_PROTO_NFC_DEP_MASK;
+		}
+	}
+
+	if (im_protocols & NFC_PROTO_NFC_DEP_MASK) {
+		r = nfc_hci_send_event(hdev,
+				PN544_RF_READER_NFCIP1_INITIATOR_GATE,
+				NFC_HCI_EVT_END_OPERATION, NULL, 0);
+		if (r < 0)
+			return r;
+
+		r = nfc_hci_set_param(hdev,
+				PN544_RF_READER_NFCIP1_INITIATOR_GATE,
+				PN544_DEP_MODE, &i_mode, 1);
+		if (r < 0)
+			return r;
+
+		r = nfc_hci_set_param(hdev,
+				PN544_RF_READER_NFCIP1_INITIATOR_GATE,
+				PN544_DEP_ATR_REQ, hdev->gb, hdev->gb_len);
+		if (r < 0)
+			return r;
+
+		r = nfc_hci_send_event(hdev,
+				PN544_RF_READER_NFCIP1_INITIATOR_GATE,
+				NFC_HCI_EVT_READER_REQUESTED, NULL, 0);
+		if (r < 0)
+			nfc_hci_send_event(hdev,
+					PN544_RF_READER_NFCIP1_INITIATOR_GATE,
+					NFC_HCI_EVT_END_OPERATION, NULL, 0);
+	}
+
+	if (tm_protocols & NFC_PROTO_NFC_DEP_MASK) {
+		r = nfc_hci_set_param(hdev, PN544_RF_READER_NFCIP1_TARGET_GATE,
+				PN544_DEP_MODE, &t_mode, 1);
+		if (r < 0)
+			return r;
+
+		r = nfc_hci_set_param(hdev, PN544_RF_READER_NFCIP1_TARGET_GATE,
+				PN544_DEP_ATR_RES, hdev->gb, hdev->gb_len);
+		if (r < 0)
+			return r;
+
+		r = nfc_hci_set_param(hdev, PN544_RF_READER_NFCIP1_TARGET_GATE,
+				PN544_DEP_MERGE, &t_merge, 1);
+		if (r < 0)
+			return r;
+	}
+
+	r = nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE,
+			       NFC_HCI_EVT_READER_REQUESTED, NULL, 0);
+	if (r < 0)
+		nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE,
+				   NFC_HCI_EVT_END_OPERATION, NULL, 0);
+
+	return r;
+}
+
+static int pn544_hci_dep_link_up(struct nfc_hci_dev *hdev,
+				struct nfc_target *target, u8 comm_mode,
+				u8 *gb, size_t gb_len)
+{
+	struct sk_buff *rgb_skb = NULL;
+	int r;
+
+	r = nfc_hci_get_param(hdev, target->hci_reader_gate,
+				PN544_DEP_ATR_RES, &rgb_skb);
+	if (r < 0)
+		return r;
+
+	if (rgb_skb->len == 0 || rgb_skb->len > NFC_GB_MAXSIZE) {
+		r = -EPROTO;
+		goto exit;
+	}
+	print_hex_dump(KERN_DEBUG, "remote gb: ", DUMP_PREFIX_OFFSET,
+			16, 1, rgb_skb->data, rgb_skb->len, true);
+
+	r = nfc_set_remote_general_bytes(hdev->ndev, rgb_skb->data,
+						rgb_skb->len);
+
+	if (r == 0)
+		r = nfc_dep_link_is_up(hdev->ndev, target->idx, comm_mode,
+					NFC_RF_INITIATOR);
+exit:
+	kfree_skb(rgb_skb);
+	return r;
+}
+
+static int pn544_hci_dep_link_down(struct nfc_hci_dev *hdev)
+{
+
+	return nfc_hci_send_event(hdev, PN544_RF_READER_NFCIP1_INITIATOR_GATE,
+					NFC_HCI_EVT_END_OPERATION, NULL, 0);
+}
+
+static int pn544_hci_target_from_gate(struct nfc_hci_dev *hdev, u8 gate,
+				      struct nfc_target *target)
+{
+	switch (gate) {
+	case PN544_RF_READER_F_GATE:
+		target->supported_protocols = NFC_PROTO_FELICA_MASK;
+		break;
+	case PN544_RF_READER_JEWEL_GATE:
+		target->supported_protocols = NFC_PROTO_JEWEL_MASK;
+		target->sens_res = 0x0c00;
+		break;
+	case PN544_RF_READER_NFCIP1_INITIATOR_GATE:
+		target->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
+		break;
+	default:
+		return -EPROTO;
+	}
+
+	return 0;
+}
+
+static int pn544_hci_complete_target_discovered(struct nfc_hci_dev *hdev,
+						u8 gate,
+						struct nfc_target *target)
+{
+	struct sk_buff *uid_skb;
+	int r = 0;
+
+	if (gate == PN544_RF_READER_NFCIP1_INITIATOR_GATE)
+		return r;
+
+	if (target->supported_protocols & NFC_PROTO_NFC_DEP_MASK) {
+		r = nfc_hci_send_cmd(hdev,
+			PN544_RF_READER_NFCIP1_INITIATOR_GATE,
+			PN544_HCI_CMD_CONTINUE_ACTIVATION, NULL, 0, NULL);
+		if (r < 0)
+			return r;
+
+		target->hci_reader_gate = PN544_RF_READER_NFCIP1_INITIATOR_GATE;
+	} else if (target->supported_protocols & NFC_PROTO_MIFARE_MASK) {
+		if (target->nfcid1_len != 4 && target->nfcid1_len != 7 &&
+		    target->nfcid1_len != 10)
+			return -EPROTO;
+
+		r = nfc_hci_send_cmd(hdev, NFC_HCI_RF_READER_A_GATE,
+				     PN544_RF_READER_CMD_ACTIVATE_NEXT,
+				     target->nfcid1, target->nfcid1_len, NULL);
+	} else if (target->supported_protocols & NFC_PROTO_FELICA_MASK) {
+		r = nfc_hci_get_param(hdev, PN544_RF_READER_F_GATE,
+				      PN544_FELICA_ID, &uid_skb);
+		if (r < 0)
+			return r;
+
+		if (uid_skb->len != 8) {
+			kfree_skb(uid_skb);
+			return -EPROTO;
+		}
+
+		r = nfc_hci_send_cmd(hdev, PN544_RF_READER_F_GATE,
+				     PN544_RF_READER_CMD_ACTIVATE_NEXT,
+				     uid_skb->data, uid_skb->len, NULL);
+		kfree_skb(uid_skb);
+
+		r = nfc_hci_send_cmd(hdev,
+					PN544_RF_READER_NFCIP1_INITIATOR_GATE,
+					PN544_HCI_CMD_CONTINUE_ACTIVATION,
+					NULL, 0, NULL);
+		if (r < 0)
+			return r;
+
+		target->hci_reader_gate = PN544_RF_READER_NFCIP1_INITIATOR_GATE;
+		target->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
+	} else if (target->supported_protocols & NFC_PROTO_ISO14443_MASK) {
+		/*
+		 * TODO: maybe other ISO 14443 require some kind of continue
+		 * activation, but for now we've seen only this one below.
+		 */
+		if (target->sens_res == 0x4403)	/* Type 4 Mifare DESFire */
+			r = nfc_hci_send_cmd(hdev, NFC_HCI_RF_READER_A_GATE,
+			      PN544_RF_READER_A_CMD_CONTINUE_ACTIVATION,
+			      NULL, 0, NULL);
+	}
+
+	return r;
+}
+
+#define PN544_CB_TYPE_READER_F 1
+
+static void pn544_hci_data_exchange_cb(void *context, struct sk_buff *skb,
+				       int err)
+{
+	struct pn544_hci_info *info = context;
+
+	switch (info->async_cb_type) {
+	case PN544_CB_TYPE_READER_F:
+		if (err == 0)
+			skb_pull(skb, 1);
+		info->async_cb(info->async_cb_context, skb, err);
+		break;
+	default:
+		if (err == 0)
+			kfree_skb(skb);
+		break;
+	}
+}
+
+#define MIFARE_CMD_AUTH_KEY_A	0x60
+#define MIFARE_CMD_AUTH_KEY_B	0x61
+#define MIFARE_CMD_HEADER	2
+#define MIFARE_UID_LEN		4
+#define MIFARE_KEY_LEN		6
+#define MIFARE_CMD_LEN		12
+/*
+ * Returns:
+ * <= 0: driver handled the data exchange
+ *    1: driver doesn't especially handle, please do standard processing
+ */
+static int pn544_hci_im_transceive(struct nfc_hci_dev *hdev,
+				   struct nfc_target *target,
+				   struct sk_buff *skb, data_exchange_cb_t cb,
+				   void *cb_context)
+{
+	struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev);
+
+	pr_info(DRIVER_DESC ": %s for gate=%d\n", __func__,
+		target->hci_reader_gate);
+
+	switch (target->hci_reader_gate) {
+	case NFC_HCI_RF_READER_A_GATE:
+		if (target->supported_protocols & NFC_PROTO_MIFARE_MASK) {
+			/*
+			 * It seems that pn544 is inverting key and UID for
+			 * MIFARE authentication commands.
+			 */
+			if (skb->len == MIFARE_CMD_LEN &&
+			    (skb->data[0] == MIFARE_CMD_AUTH_KEY_A ||
+			     skb->data[0] == MIFARE_CMD_AUTH_KEY_B)) {
+				u8 uid[MIFARE_UID_LEN];
+				u8 *data = skb->data + MIFARE_CMD_HEADER;
+
+				memcpy(uid, data + MIFARE_KEY_LEN,
+				       MIFARE_UID_LEN);
+				memmove(data + MIFARE_UID_LEN, data,
+					MIFARE_KEY_LEN);
+				memcpy(data, uid, MIFARE_UID_LEN);
+			}
+
+			return nfc_hci_send_cmd_async(hdev,
+						      target->hci_reader_gate,
+						      PN544_MIFARE_CMD,
+						      skb->data, skb->len,
+						      cb, cb_context);
+		} else
+			return 1;
+	case PN544_RF_READER_F_GATE:
+		*skb_push(skb, 1) = 0;
+		*skb_push(skb, 1) = 0;
+
+		info->async_cb_type = PN544_CB_TYPE_READER_F;
+		info->async_cb = cb;
+		info->async_cb_context = cb_context;
+
+		return nfc_hci_send_cmd_async(hdev, target->hci_reader_gate,
+					      PN544_FELICA_RAW, skb->data,
+					      skb->len,
+					      pn544_hci_data_exchange_cb, info);
+	case PN544_RF_READER_JEWEL_GATE:
+		return nfc_hci_send_cmd_async(hdev, target->hci_reader_gate,
+					      PN544_JEWEL_RAW_CMD, skb->data,
+					      skb->len, cb, cb_context);
+	case PN544_RF_READER_NFCIP1_INITIATOR_GATE:
+		*skb_push(skb, 1) = 0;
+
+		return nfc_hci_send_event(hdev, target->hci_reader_gate,
+					PN544_HCI_EVT_SND_DATA, skb->data,
+					skb->len);
+	default:
+		return 1;
+	}
+}
+
+static int pn544_hci_tm_send(struct nfc_hci_dev *hdev, struct sk_buff *skb)
+{
+	/* Set default false for multiple information chaining */
+	*skb_push(skb, 1) = 0;
+
+	return nfc_hci_send_event(hdev, PN544_RF_READER_NFCIP1_TARGET_GATE,
+				PN544_HCI_EVT_SND_DATA, skb->data, skb->len);
+}
+
+static int pn544_hci_check_presence(struct nfc_hci_dev *hdev,
+				   struct nfc_target *target)
+{
+	pr_debug("supported protocol %d", target->supported_protocols);
+	if (target->supported_protocols & (NFC_PROTO_ISO14443_MASK |
+					NFC_PROTO_ISO14443_B_MASK)) {
+		return nfc_hci_send_cmd(hdev, target->hci_reader_gate,
+					PN544_RF_READER_CMD_PRESENCE_CHECK,
+					NULL, 0, NULL);
+	} else if (target->supported_protocols & NFC_PROTO_MIFARE_MASK) {
+		if (target->nfcid1_len != 4 && target->nfcid1_len != 7 &&
+		    target->nfcid1_len != 10)
+			return -EOPNOTSUPP;
+
+		 return nfc_hci_send_cmd(hdev, NFC_HCI_RF_READER_A_GATE,
+				     PN544_RF_READER_CMD_ACTIVATE_NEXT,
+				     target->nfcid1, target->nfcid1_len, NULL);
+	} else if (target->supported_protocols & NFC_PROTO_JEWEL_MASK) {
+		return nfc_hci_send_cmd(hdev, target->hci_reader_gate,
+					PN544_JEWEL_RAW_CMD, NULL, 0, NULL);
+	} else if (target->supported_protocols & NFC_PROTO_FELICA_MASK) {
+		return nfc_hci_send_cmd(hdev, PN544_RF_READER_F_GATE,
+					PN544_FELICA_RAW, NULL, 0, NULL);
+	} else if (target->supported_protocols & NFC_PROTO_NFC_DEP_MASK) {
+		return nfc_hci_send_cmd(hdev, target->hci_reader_gate,
+					PN544_HCI_CMD_ATTREQUEST,
+					NULL, 0, NULL);
+	}
+
+	return 0;
+}
+
+void pn544_hci_event_received(struct nfc_hci_dev *hdev, u8 gate, u8 event,
+				struct sk_buff *skb)
+{
+	struct sk_buff *rgb_skb = NULL;
+	int r = 0;
+
+	pr_debug("hci event %d", event);
+	switch (event) {
+	case PN544_HCI_EVT_ACTIVATED:
+		if (gate == PN544_RF_READER_NFCIP1_INITIATOR_GATE)
+			nfc_hci_target_discovered(hdev, gate);
+		else if (gate == PN544_RF_READER_NFCIP1_TARGET_GATE) {
+			r = nfc_hci_get_param(hdev, gate, PN544_DEP_ATR_REQ,
+						&rgb_skb);
+
+			if (r < 0)
+				goto exit;
+
+			nfc_tm_activated(hdev->ndev, NFC_PROTO_NFC_DEP_MASK,
+					NFC_COMM_PASSIVE, rgb_skb->data,
+					rgb_skb->len);
+
+			kfree_skb(rgb_skb);
+		}
+
+		break;
+	case PN544_HCI_EVT_DEACTIVATED:
+		nfc_hci_send_event(hdev, gate,
+			NFC_HCI_EVT_END_OPERATION, NULL, 0);
+		break;
+	case PN544_HCI_EVT_RCV_DATA:
+		if (skb->len < 2) {
+			r = -EPROTO;
+			goto exit;
+		}
+
+		if (skb->data[0] != 0) {
+			pr_debug("data0 %d", skb->data[0]);
+			r = -EPROTO;
+			goto exit;
+		}
+
+		skb_pull(skb, 2);
+		nfc_tm_data_received(hdev->ndev, skb);
+
+		return;
+	default:
+		break;
+	}
+
+exit:
+	kfree_skb(skb);
+}
+
+static struct nfc_hci_ops pn544_hci_ops = {
+	.open = pn544_hci_open,
+	.close = pn544_hci_close,
+	.hci_ready = pn544_hci_ready,
+	.xmit = pn544_hci_xmit,
+	.start_poll = pn544_hci_start_poll,
+	.dep_link_up = pn544_hci_dep_link_up,
+	.dep_link_down = pn544_hci_dep_link_down,
+	.target_from_gate = pn544_hci_target_from_gate,
+	.complete_target_discovered = pn544_hci_complete_target_discovered,
+	.im_transceive = pn544_hci_im_transceive,
+	.tm_send = pn544_hci_tm_send,
+	.check_presence = pn544_hci_check_presence,
+	.event_received = pn544_hci_event_received,
+};
+
+int pn544_hci_probe(void *phy_id, struct nfc_phy_ops *phy_ops, char *llc_name,
+		    int phy_headroom, int phy_tailroom, int phy_payload,
+		    struct nfc_hci_dev **hdev)
+{
+	struct pn544_hci_info *info;
+	u32 protocols;
+	struct nfc_hci_init_data init_data;
+	int r;
+
+	info = kzalloc(sizeof(struct pn544_hci_info), GFP_KERNEL);
+	if (!info) {
+		pr_err("Cannot allocate memory for pn544_hci_info.\n");
+		r = -ENOMEM;
+		goto err_info_alloc;
+	}
+
+	info->phy_ops = phy_ops;
+	info->phy_id = phy_id;
+	info->state = PN544_ST_COLD;
+	mutex_init(&info->info_lock);
+
+	init_data.gate_count = ARRAY_SIZE(pn544_gates);
+
+	memcpy(init_data.gates, pn544_gates, sizeof(pn544_gates));
+
+	/*
+	 * TODO: Session id must include the driver name + some bus addr
+	 * persistent info to discriminate 2 identical chips
+	 */
+	strcpy(init_data.session_id, "ID544HCI");
+
+	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;
+
+	info->hdev = nfc_hci_allocate_device(&pn544_hci_ops, &init_data,
+					     protocols, llc_name,
+					     phy_headroom + PN544_CMDS_HEADROOM,
+					     phy_tailroom, phy_payload);
+	if (!info->hdev) {
+		pr_err("Cannot allocate nfc hdev.\n");
+		r = -ENOMEM;
+		goto err_alloc_hdev;
+	}
+
+	nfc_hci_set_clientdata(info->hdev, info);
+
+	r = nfc_hci_register_device(info->hdev);
+	if (r)
+		goto err_regdev;
+
+	*hdev = info->hdev;
+
+	return 0;
+
+err_regdev:
+	nfc_hci_free_device(info->hdev);
+
+err_alloc_hdev:
+	kfree(info);
+
+err_info_alloc:
+	return r;
+}
+
+void pn544_hci_remove(struct nfc_hci_dev *hdev)
+{
+	struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev);
+
+	nfc_hci_unregister_device(hdev);
+	nfc_hci_free_device(hdev);
+	kfree(info);
+}