Linux-libre 4.4-gnupck-4.4-gnu

1 files changed, 0 insertions, 1064 deletions

diff --git a/drivers/nfc/st21nfca/st21nfca.c b/drivers/nfc/st21nfca/st21nfca.c
deleted file mode 100644
index 051286562..000000000
--- a/drivers/nfc/st21nfca/st21nfca.c
+++ /dev/null
@@ -1,1064 +0,0 @@
-/*
- * HCI 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/hci.h>
-#include <net/nfc/llc.h>
-
-#include "st21nfca.h"
-#include "st21nfca_dep.h"
-#include "st21nfca_se.h"
-
-#define DRIVER_DESC "HCI NFC driver for ST21NFCA"
-
-#define FULL_VERSION_LEN 3
-
-/* Proprietary gates, events, commands and registers */
-
-/* Commands that apply to all RF readers */
-#define ST21NFCA_RF_READER_CMD_PRESENCE_CHECK	0x30
-
-#define ST21NFCA_RF_READER_ISO15693_GATE	0x12
-#define ST21NFCA_RF_READER_ISO15693_INVENTORY	0x01
-
-/*
- * Reader gate for communication with contact-less cards using Type A
- * protocol ISO14443-3 but not compliant with ISO14443-4
- */
-#define ST21NFCA_RF_READER_14443_3_A_GATE	0x15
-#define ST21NFCA_RF_READER_14443_3_A_UID	0x02
-#define ST21NFCA_RF_READER_14443_3_A_ATQA	0x03
-#define ST21NFCA_RF_READER_14443_3_A_SAK	0x04
-
-#define ST21NFCA_RF_READER_F_DATARATE		0x01
-#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_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_212_424	0x01
-
-#define ST21NFCA_DEVICE_MGNT_PIPE		0x02
-
-#define ST21NFCA_DM_GETINFO			0x13
-#define ST21NFCA_DM_GETINFO_PIPE_LIST		0x02
-#define ST21NFCA_DM_GETINFO_PIPE_INFO		0x01
-#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))
-
-#define ST21NFCA_NFC_MODE			0x03	/* NFC_MODE parameter*/
-
-#define ST21NFCA_EVT_HOT_PLUG			0x03
-#define ST21NFCA_EVT_HOT_PLUG_IS_INHIBITED(x) (x->data[0] & 0x80)
-
-#define ST21NFCA_SE_TO_PIPES			2000
-
-static DECLARE_BITMAP(dev_mask, ST21NFCA_NUM_DEVICES);
-
-static struct nfc_hci_gate st21nfca_gates[] = {
-	{NFC_HCI_ADMIN_GATE, NFC_HCI_ADMIN_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_LINK_MGMT_PIPE},
-	{NFC_HCI_RF_READER_B_GATE, NFC_HCI_INVALID_PIPE},
-	{NFC_HCI_RF_READER_A_GATE, NFC_HCI_INVALID_PIPE},
-	{ST21NFCA_DEVICE_MGNT_GATE, ST21NFCA_DEVICE_MGNT_PIPE},
-	{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},
-
-	/* Secure element pipes are created by secure element host */
-	{ST21NFCA_CONNECTIVITY_GATE, NFC_HCI_DO_NOT_CREATE_PIPE},
-	{ST21NFCA_APDU_READER_GATE, NFC_HCI_DO_NOT_CREATE_PIPE},
-};
-
-struct st21nfca_pipe_info {
-	u8 pipe_state;
-	u8 src_host_id;
-	u8 src_gate_id;
-	u8 dst_host_id;
-	u8 dst_gate_id;
-} __packed;
-
-/* Largest headroom needed for outgoing custom commands */
-#define ST21NFCA_CMDS_HEADROOM  7
-
-static int st21nfca_hci_load_session(struct nfc_hci_dev *hdev)
-{
-	int i, j, r;
-	struct sk_buff *skb_pipe_list, *skb_pipe_info;
-	struct st21nfca_pipe_info *info;
-
-	u8 pipe_list[] = { ST21NFCA_DM_GETINFO_PIPE_LIST,
-		NFC_HCI_TERMINAL_HOST_ID
-	};
-	u8 pipe_info[] = { ST21NFCA_DM_GETINFO_PIPE_INFO,
-		NFC_HCI_TERMINAL_HOST_ID, 0
-	};
-
-	/* On ST21NFCA device pipes number are dynamics
-	 * A maximum of 16 pipes can be created at the same time
-	 * If pipes are already created, hci_dev_up will fail.
-	 * Doing a clear all pipe is a bad idea because:
-	 * - It does useless EEPROM cycling
-	 * - It might cause issue for secure elements support
-	 * (such as removing connectivity or APDU reader pipe)
-	 * A better approach on ST21NFCA is to:
-	 * - get a pipe list for each host.
-	 * (eg: NFC_HCI_HOST_CONTROLLER_ID for now).
-	 * (TODO Later on UICC HOST and eSE HOST)
-	 * - get pipe information
-	 * - match retrieved pipe list in st21nfca_gates
-	 * ST21NFCA_DEVICE_MGNT_GATE is a proprietary gate
-	 * with ST21NFCA_DEVICE_MGNT_PIPE.
-	 * Pipe can be closed and need to be open.
-	 */
-	r = nfc_hci_connect_gate(hdev, NFC_HCI_HOST_CONTROLLER_ID,
-				ST21NFCA_DEVICE_MGNT_GATE,
-				ST21NFCA_DEVICE_MGNT_PIPE);
-	if (r < 0)
-		return r;
-
-	/* Get pipe list */
-	r = nfc_hci_send_cmd(hdev, ST21NFCA_DEVICE_MGNT_GATE,
-			ST21NFCA_DM_GETINFO, pipe_list, sizeof(pipe_list),
-			&skb_pipe_list);
-	if (r < 0)
-		return r;
-
-	/* Complete the existing gate_pipe table */
-	for (i = 0; i < skb_pipe_list->len; i++) {
-		pipe_info[2] = skb_pipe_list->data[i];
-		r = nfc_hci_send_cmd(hdev, ST21NFCA_DEVICE_MGNT_GATE,
-					ST21NFCA_DM_GETINFO, pipe_info,
-					sizeof(pipe_info), &skb_pipe_info);
-
-		if (r)
-			continue;
-
-		/*
-		 * Match pipe ID and gate ID
-		 * Output format from ST21NFC_DM_GETINFO is:
-		 * - pipe state (1byte)
-		 * - source hid (1byte)
-		 * - source gid (1byte)
-		 * - destination hid (1byte)
-		 * - destination gid (1byte)
-		 */
-		info = (struct st21nfca_pipe_info *) skb_pipe_info->data;
-		if (info->dst_gate_id == ST21NFCA_APDU_READER_GATE &&
-			info->src_host_id != ST21NFCA_ESE_HOST_ID) {
-			pr_err("Unexpected apdu_reader pipe on host %x\n",
-				info->src_host_id);
-			kfree_skb(skb_pipe_info);
-			continue;
-		}
-
-		for (j = 0; (j < ARRAY_SIZE(st21nfca_gates)) &&
-			(st21nfca_gates[j].gate != info->dst_gate_id) ; j++)
-			;
-
-		if (j < ARRAY_SIZE(st21nfca_gates) &&
-			st21nfca_gates[j].gate == info->dst_gate_id &&
-			ST21NFCA_DM_IS_PIPE_OPEN(info->pipe_state)) {
-			st21nfca_gates[j].pipe = pipe_info[2];
-
-			hdev->gate2pipe[st21nfca_gates[j].gate] =
-							st21nfca_gates[j].pipe;
-			hdev->pipes[st21nfca_gates[j].pipe].gate =
-							st21nfca_gates[j].gate;
-			hdev->pipes[st21nfca_gates[j].pipe].dest_host =
-							info->src_host_id;
-		}
-		kfree_skb(skb_pipe_info);
-	}
-
-	/*
-	 * 3 gates have a well known pipe ID.
-	 * They will never appear in the pipe list
-	 */
-	if (skb_pipe_list->len + 3 < ARRAY_SIZE(st21nfca_gates)) {
-		for (i = skb_pipe_list->len + 3;
-				i < ARRAY_SIZE(st21nfca_gates) - 2; i++) {
-			r = nfc_hci_connect_gate(hdev,
-					NFC_HCI_HOST_CONTROLLER_ID,
-					st21nfca_gates[i].gate,
-					st21nfca_gates[i].pipe);
-			if (r < 0)
-				goto free_list;
-		}
-	}
-
-	memcpy(hdev->init_data.gates, st21nfca_gates, sizeof(st21nfca_gates));
-free_list:
-	kfree_skb(skb_pipe_list);
-	return r;
-}
-
-static int st21nfca_hci_open(struct nfc_hci_dev *hdev)
-{
-	struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
-	int r;
-
-	mutex_lock(&info->info_lock);
-
-	if (info->state != ST21NFCA_ST_COLD) {
-		r = -EBUSY;
-		goto out;
-	}
-
-	r = info->phy_ops->enable(info->phy_id);
-
-	if (r == 0)
-		info->state = ST21NFCA_ST_READY;
-
-out:
-	mutex_unlock(&info->info_lock);
-	return r;
-}
-
-static void st21nfca_hci_close(struct nfc_hci_dev *hdev)
-{
-	struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
-
-	mutex_lock(&info->info_lock);
-
-	if (info->state == ST21NFCA_ST_COLD)
-		goto out;
-
-	info->phy_ops->disable(info->phy_id);
-	info->state = ST21NFCA_ST_COLD;
-
-out:
-	mutex_unlock(&info->info_lock);
-}
-
-static int st21nfca_hci_ready(struct nfc_hci_dev *hdev)
-{
-	struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
-	struct sk_buff *skb;
-
-	u8 param;
-	u8 white_list[2];
-	int wl_size = 0;
-	int r;
-
-	if (info->se_status->is_ese_present &&
-		info->se_status->is_uicc_present) {
-		white_list[wl_size++] = NFC_HCI_UICC_HOST_ID;
-		white_list[wl_size++] = ST21NFCA_ESE_HOST_ID;
-	} else if (!info->se_status->is_ese_present &&
-			 info->se_status->is_uicc_present) {
-		white_list[wl_size++] = NFC_HCI_UICC_HOST_ID;
-	} else if (info->se_status->is_ese_present &&
-			!info->se_status->is_uicc_present) {
-		white_list[wl_size++] = ST21NFCA_ESE_HOST_ID;
-	}
-
-	if (wl_size) {
-		r = nfc_hci_set_param(hdev, NFC_HCI_ADMIN_GATE,
-					NFC_HCI_ADMIN_WHITELIST,
-					(u8 *) &white_list, wl_size);
-		if (r < 0)
-			return r;
-	}
-
-	/* Set NFC_MODE in device management gate to enable */
-	r = nfc_hci_get_param(hdev, ST21NFCA_DEVICE_MGNT_GATE,
-			      ST21NFCA_NFC_MODE, &skb);
-	if (r < 0)
-		return r;
-
-	param = skb->data[0];
-	kfree_skb(skb);
-	if (param == 0) {
-		param = 1;
-
-		r = nfc_hci_set_param(hdev, ST21NFCA_DEVICE_MGNT_GATE,
-					ST21NFCA_NFC_MODE, &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;
-
-	r = nfc_hci_get_param(hdev, NFC_HCI_ID_MGMT_GATE,
-			      NFC_HCI_ID_MGMT_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 st21nfca_hci_xmit(struct nfc_hci_dev *hdev, struct sk_buff *skb)
-{
-	struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
-
-	return info->phy_ops->write(info->phy_id, skb);
-}
-
-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);
-
-	r = nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE,
-			       NFC_HCI_EVT_END_OPERATION, NULL, 0);
-	if (r < 0)
-		return r;
-	if (im_protocols) {
-		/*
-		 * enable polling according to im_protocols & tm_protocols
-		 * - CLOSE pipe according to im_protocols & tm_protocols
-		 */
-		if ((NFC_HCI_RF_READER_B_GATE & im_protocols) == 0) {
-			r = nfc_hci_disconnect_gate(hdev,
-					NFC_HCI_RF_READER_B_GATE);
-			if (r < 0)
-				return r;
-		}
-
-		if ((NFC_HCI_RF_READER_A_GATE & im_protocols) == 0) {
-			r = nfc_hci_disconnect_gate(hdev,
-					NFC_HCI_RF_READER_A_GATE);
-			if (r < 0)
-				return r;
-		}
-
-		if ((ST21NFCA_RF_READER_F_GATE & im_protocols) == 0) {
-			r = nfc_hci_disconnect_gate(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((__force __be32)
-					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) {
-			r = nfc_hci_disconnect_gate(hdev,
-					ST21NFCA_RF_READER_14443_3_A_GATE);
-			if (r < 0)
-				return r;
-		}
-
-		if ((ST21NFCA_RF_READER_ISO15693_GATE & im_protocols) == 0) {
-			r = nfc_hci_disconnect_gate(hdev,
-					ST21NFCA_RF_READER_ISO15693_GATE);
-			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);
-	}
-
-	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) {
-				kfree_skb(datarate_skb);
-				return r;
-			}
-		}
-		kfree_skb(datarate_skb);
-
-		/*
-		 * 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;
-	struct sk_buff *atqa_skb = NULL;
-
-	r = nfc_hci_get_param(hdev, ST21NFCA_RF_READER_14443_3_A_GATE,
-			      ST21NFCA_RF_READER_14443_3_A_ATQA, &atqa_skb);
-	if (r < 0)
-		goto exit;
-
-	if (atqa_skb->len != 2) {
-		r = -EPROTO;
-		goto exit;
-	}
-
-	*atqa = be16_to_cpu(*(__be16 *) atqa_skb->data);
-
-exit:
-	kfree_skb(atqa_skb);
-	return r;
-}
-
-static int st21nfca_get_iso14443_3_sak(struct nfc_hci_dev *hdev, u8 *sak)
-{
-	int r;
-	struct sk_buff *sak_skb = NULL;
-
-	r = nfc_hci_get_param(hdev, ST21NFCA_RF_READER_14443_3_A_GATE,
-			      ST21NFCA_RF_READER_14443_3_A_SAK, &sak_skb);
-	if (r < 0)
-		goto exit;
-
-	if (sak_skb->len != 1) {
-		r = -EPROTO;
-		goto exit;
-	}
-
-	*sak = sak_skb->data[0];
-
-exit:
-	kfree_skb(sak_skb);
-	return r;
-}
-
-static int st21nfca_get_iso14443_3_uid(struct nfc_hci_dev *hdev, u8 *uid,
-				       int *len)
-{
-	int r;
-	struct sk_buff *uid_skb = NULL;
-
-	r = nfc_hci_get_param(hdev, ST21NFCA_RF_READER_14443_3_A_GATE,
-			      ST21NFCA_RF_READER_14443_3_A_UID, &uid_skb);
-	if (r < 0)
-		goto exit;
-
-	if (uid_skb->len == 0 || uid_skb->len > NFC_NFCID1_MAXSIZE) {
-		r = -EPROTO;
-		goto exit;
-	}
-
-	memcpy(uid, uid_skb->data, uid_skb->len);
-	*len = uid_skb->len;
-exit:
-	kfree_skb(uid_skb);
-	return r;
-}
-
-static int st21nfca_get_iso15693_inventory(struct nfc_hci_dev *hdev,
-					   struct nfc_target *target)
-{
-	int r;
-	struct sk_buff *inventory_skb = NULL;
-
-	r = nfc_hci_get_param(hdev, ST21NFCA_RF_READER_ISO15693_GATE,
-			      ST21NFCA_RF_READER_ISO15693_INVENTORY,
-			      &inventory_skb);
-	if (r < 0)
-		goto exit;
-
-	skb_pull(inventory_skb, 2);
-
-	if (inventory_skb->len == 0 ||
-	    inventory_skb->len > NFC_ISO15693_UID_MAXSIZE) {
-		r = -EPROTO;
-		goto exit;
-	}
-
-	memcpy(target->iso15693_uid, inventory_skb->data, inventory_skb->len);
-	target->iso15693_dsfid	= inventory_skb->data[1];
-	target->is_iso15693 = 1;
-exit:
-	kfree_skb(inventory_skb);
-	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)
-{
-	int r, len;
-	u16 atqa;
-	u8 sak;
-	u8 uid[NFC_NFCID1_MAXSIZE];
-
-	switch (gate) {
-	case ST21NFCA_RF_READER_F_GATE:
-		target->supported_protocols = NFC_PROTO_FELICA_MASK;
-		break;
-	case ST21NFCA_RF_READER_14443_3_A_GATE:
-		/* ISO14443-3 type 1 or 2 tags */
-		r = st21nfca_get_iso14443_3_atqa(hdev, &atqa);
-		if (r < 0)
-			return r;
-		if (atqa == 0x000c) {
-			target->supported_protocols = NFC_PROTO_JEWEL_MASK;
-			target->sens_res = 0x0c00;
-		} else {
-			r = st21nfca_get_iso14443_3_sak(hdev, &sak);
-			if (r < 0)
-				return r;
-
-			r = st21nfca_get_iso14443_3_uid(hdev, uid, &len);
-			if (r < 0)
-				return r;
-
-			target->supported_protocols =
-			    nfc_hci_sak_to_protocol(sak);
-			if (target->supported_protocols == 0xffffffff)
-				return -EPROTO;
-
-			target->sens_res = atqa;
-			target->sel_res = sak;
-			memcpy(target->nfcid1, uid, len);
-			target->nfcid1_len = len;
-		}
-
-		break;
-	case ST21NFCA_RF_READER_ISO15693_GATE:
-		target->supported_protocols = NFC_PROTO_ISO15693_MASK;
-		r = st21nfca_get_iso15693_inventory(hdev, target);
-		if (r < 0)
-			return r;
-		break;
-	default:
-		return -EPROTO;
-	}
-
-	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 *nfcid_skb = NULL;
-
-	if (gate == ST21NFCA_RF_READER_F_GATE) {
-		r = nfc_hci_get_param(hdev, ST21NFCA_RF_READER_F_GATE,
-				ST21NFCA_RF_READER_F_NFCID2, &nfcid_skb);
-		if (r < 0)
-			goto exit;
-
-		if (nfcid_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 (nfcid_skb->len > 0) {
-			/* P2P in type F */
-			memcpy(target->sensf_res, nfcid_skb->data,
-				nfcid_skb->len);
-			target->sensf_res_len = nfcid_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 {
-			kfree_skb(nfcid_skb);
-			/* P2P in type A */
-			r = nfc_hci_get_param(hdev, ST21NFCA_RF_READER_F_GATE,
-					ST21NFCA_RF_READER_F_NFCID1,
-					&nfcid_skb);
-			if (r < 0)
-				goto exit;
-
-			if (nfcid_skb->len > NFC_NFCID1_MAXSIZE) {
-				r = -EPROTO;
-				goto exit;
-			}
-			memcpy(target->sensf_res, nfcid_skb->data,
-				nfcid_skb->len);
-			target->sensf_res_len = nfcid_skb->len;
-			target->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
-		}
-		target->hci_reader_gate = ST21NFCA_RF_READER_F_GATE;
-	}
-	r = 1;
-exit:
-	kfree_skb(nfcid_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)
-{
-	struct st21nfca_hci_info *info = context;
-
-	switch (info->async_cb_type) {
-	case ST21NFCA_CB_TYPE_READER_ISO15693:
-		if (err == 0)
-			skb_trim(skb, skb->len - 1);
-		info->async_cb(info->async_cb_context, skb, err);
-		break;
-	default:
-		if (err == 0)
-			kfree_skb(skb);
-		break;
-	}
-}
-
-/*
- * Returns:
- * <= 0: driver handled the data exchange
- *    1: driver doesn't especially handle, please do standard processing
- */
-static int st21nfca_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 st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
-
-	pr_info(DRIVER_DESC ": %s for gate=%d len=%d\n", __func__,
-		target->hci_reader_gate, skb->len);
-
-	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,
-					      skb->len, cb, cb_context);
-	case ST21NFCA_RF_READER_14443_3_A_GATE:
-		*skb_push(skb, 1) = 0x1a;	/* CTR, see spec:10.2.2.1 */
-
-		return nfc_hci_send_cmd_async(hdev, target->hci_reader_gate,
-					      ST21NFCA_WR_XCHG_DATA, skb->data,
-					      skb->len, cb, cb_context);
-	case ST21NFCA_RF_READER_ISO15693_GATE:
-		info->async_cb_type = ST21NFCA_CB_TYPE_READER_ISO15693;
-		info->async_cb = cb;
-		info->async_cb_context = cb_context;
-
-		*skb_push(skb, 1) = 0x17;
-
-		return nfc_hci_send_cmd_async(hdev, target->hci_reader_gate,
-					      ST21NFCA_WR_XCHG_DATA, skb->data,
-					      skb->len,
-					      st21nfca_hci_data_exchange_cb,
-					      info);
-		break;
-	default:
-		return 1;
-	}
-}
-
-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)
-{
-	u8 fwi = 0x11;
-
-	switch (target->hci_reader_gate) {
-	case NFC_HCI_RF_READER_A_GATE:
-	case NFC_HCI_RF_READER_B_GATE:
-		/*
-		 * PRESENCE_CHECK on those gates is available
-		 * However, the answer to this command is taking 3 * fwi
-		 * if the card is no present.
-		 * Instead, we send an empty I-Frame with a very short
-		 * configurable fwi ~604µs.
-		 */
-		return nfc_hci_send_cmd(hdev, target->hci_reader_gate,
-					ST21NFCA_WR_XCHG_DATA, &fwi, 1, NULL);
-	case ST21NFCA_RF_READER_14443_3_A_GATE:
-		return nfc_hci_send_cmd(hdev, target->hci_reader_gate,
-					ST21NFCA_RF_READER_CMD_PRESENCE_CHECK,
-					NULL, 0, NULL);
-	default:
-		return -EOPNOTSUPP;
-	}
-}
-
-static void st21nfca_hci_cmd_received(struct nfc_hci_dev *hdev, u8 pipe, u8 cmd,
-				struct sk_buff *skb)
-{
-	struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
-	u8 gate = hdev->pipes[pipe].gate;
-
-	pr_debug("cmd: %x\n", cmd);
-
-	switch (cmd) {
-	case NFC_HCI_ANY_OPEN_PIPE:
-		if (gate != ST21NFCA_APDU_READER_GATE &&
-			hdev->pipes[pipe].dest_host != NFC_HCI_UICC_HOST_ID)
-			info->se_info.count_pipes++;
-
-		if (info->se_info.count_pipes == info->se_info.expected_pipes) {
-			del_timer_sync(&info->se_info.se_active_timer);
-			info->se_info.se_active = false;
-			info->se_info.count_pipes = 0;
-			complete(&info->se_info.req_completion);
-		}
-	break;
-	}
-}
-
-static int st21nfca_admin_event_received(struct nfc_hci_dev *hdev, u8 event,
-					struct sk_buff *skb)
-{
-	struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
-
-	pr_debug("admin event: %x\n", event);
-
-	switch (event) {
-	case ST21NFCA_EVT_HOT_PLUG:
-		if (info->se_info.se_active) {
-			if (!ST21NFCA_EVT_HOT_PLUG_IS_INHIBITED(skb)) {
-				del_timer_sync(&info->se_info.se_active_timer);
-				info->se_info.se_active = false;
-				complete(&info->se_info.req_completion);
-			} else {
-				mod_timer(&info->se_info.se_active_timer,
-					jiffies +
-					msecs_to_jiffies(ST21NFCA_SE_TO_PIPES));
-			}
-		}
-	break;
-	}
-	kfree_skb(skb);
-	return 0;
-}
-
-/*
- * 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 pipe,
-				       u8 event, struct sk_buff *skb)
-{
-	u8 gate = hdev->pipes[pipe].gate;
-	u8 host = hdev->pipes[pipe].dest_host;
-
-	pr_debug("hci event: %d gate: %x\n", event, gate);
-
-	switch (gate) {
-	case NFC_HCI_ADMIN_GATE:
-		return st21nfca_admin_event_received(hdev, event, skb);
-	case ST21NFCA_RF_CARD_F_GATE:
-		return st21nfca_dep_event_received(hdev, event, skb);
-	case ST21NFCA_CONNECTIVITY_GATE:
-		return st21nfca_connectivity_event_received(hdev, host,
-							event, skb);
-	case ST21NFCA_APDU_READER_GATE:
-		return st21nfca_apdu_reader_event_received(hdev, event, skb);
-	default:
-		return 1;
-	}
-}
-
-static struct nfc_hci_ops st21nfca_hci_ops = {
-	.open = st21nfca_hci_open,
-	.close = st21nfca_hci_close,
-	.load_session = st21nfca_hci_load_session,
-	.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,
-	.cmd_received = st21nfca_hci_cmd_received,
-	.discover_se = st21nfca_hci_discover_se,
-	.enable_se = st21nfca_hci_enable_se,
-	.disable_se = st21nfca_hci_disable_se,
-	.se_io = st21nfca_hci_se_io,
-};
-
-int st21nfca_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 st21nfca_se_status *se_status)
-{
-	struct st21nfca_hci_info *info;
-	int r = 0;
-	int dev_num;
-	u32 protocols;
-	struct nfc_hci_init_data init_data;
-	unsigned long quirks = 0;
-
-	info = kzalloc(sizeof(struct st21nfca_hci_info), GFP_KERNEL);
-	if (!info) {
-		r = -ENOMEM;
-		goto err_alloc_hdev;
-	}
-
-	info->phy_ops = phy_ops;
-	info->phy_id = phy_id;
-	info->state = ST21NFCA_ST_COLD;
-	mutex_init(&info->info_lock);
-
-	init_data.gate_count = ARRAY_SIZE(st21nfca_gates);
-
-	memcpy(init_data.gates, st21nfca_gates, sizeof(st21nfca_gates));
-
-	/*
-	 * Session id must include the driver name + i2c bus addr
-	 * persistent info to discriminate 2 identical chips
-	 */
-	dev_num = find_first_zero_bit(dev_mask, ST21NFCA_NUM_DEVICES);
-
-	if (dev_num >= ST21NFCA_NUM_DEVICES)
-		return -ENODEV;
-
-	set_bit(dev_num, dev_mask);
-
-	scnprintf(init_data.session_id, sizeof(init_data.session_id), "%s%2x",
-		  "ST21AH", dev_num);
-
-	protocols = NFC_PROTO_JEWEL_MASK |
-	    NFC_PROTO_MIFARE_MASK |
-	    NFC_PROTO_FELICA_MASK |
-	    NFC_PROTO_ISO14443_MASK |
-	    NFC_PROTO_ISO14443_B_MASK |
-	    NFC_PROTO_ISO15693_MASK |
-	    NFC_PROTO_NFC_DEP_MASK;
-
-	set_bit(NFC_HCI_QUIRK_SHORT_CLEAR, &quirks);
-
-	info->hdev =
-	    nfc_hci_allocate_device(&st21nfca_hci_ops, &init_data, quirks,
-				    protocols, llc_name,
-				    phy_headroom + ST21NFCA_CMDS_HEADROOM,
-				    phy_tailroom, phy_payload);
-
-	if (!info->hdev) {
-		pr_err("Cannot allocate nfc hdev.\n");
-		r = -ENOMEM;
-		goto err_alloc_hdev;
-	}
-
-	info->se_status = se_status;
-
-	nfc_hci_set_clientdata(info->hdev, info);
-
-	r = nfc_hci_register_device(info->hdev);
-	if (r)
-		goto err_regdev;
-
-	*hdev = info->hdev;
-	st21nfca_dep_init(info->hdev);
-	st21nfca_se_init(info->hdev);
-
-	return 0;
-
-err_regdev:
-	nfc_hci_free_device(info->hdev);
-
-err_alloc_hdev:
-	kfree(info);
-
-	return r;
-}
-EXPORT_SYMBOL(st21nfca_hci_probe);
-
-void st21nfca_hci_remove(struct nfc_hci_dev *hdev)
-{
-	struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
-
-	st21nfca_dep_deinit(hdev);
-	st21nfca_se_deinit(hdev);
-	nfc_hci_unregister_device(hdev);
-	nfc_hci_free_device(hdev);
-	kfree(info);
-}
-EXPORT_SYMBOL(st21nfca_hci_remove);
-
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION(DRIVER_DESC);