Merge tag 'nfc-next-3.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/nfc-3.0

This is the first NFC pull request for 3.8

With this one we have:

- pn544 p2p support.
- pn544 physical and HCI layers separation. We are getting the pn544 driver
  ready to support non i2c physical layers.
- LLCP SNL (Service Name Lookup). This is the NFC p2p service discovery
  protocol.
- LLCP datagram sockets (connection less) support.
- IDR library usage for NFC devices indexes assignement.
- NFC netlink extension for setting and getting LLCP link characteristics.
- Various code style fixes and cleanups spread over the pn533, LLCP, HCI and
  pn544 code.

drivers/nfc/Makefile

@@ -2,7 +2,7 @@
 # Makefile for nfc devices
 #
 
-obj-$(CONFIG_PN544_HCI_NFC)	+= pn544_hci.o
+obj-$(CONFIG_PN544_HCI_NFC)	+= pn544/
 obj-$(CONFIG_NFC_PN533)		+= pn533.o
 obj-$(CONFIG_NFC_WILINK)	+= nfcwilink.o
 

drivers/nfc/pn533.c

@@ -84,6 +84,10 @@ MODULE_DEVICE_TABLE(usb, pn533_table);
 #define PN533_LISTEN_TIME 2
 
 /* frame definitions */
+#define PN533_NORMAL_FRAME_MAX_LEN 262  /* 6   (PREAMBLE, SOF, LEN, LCS, TFI)
+					   254 (DATA)
+					   2   (DCS, postamble) */
+
 #define PN533_FRAME_TAIL_SIZE 2
 #define PN533_FRAME_SIZE(f) (sizeof(struct pn533_frame) + f->datalen + \
 				PN533_FRAME_TAIL_SIZE)
@@ -1165,8 +1169,7 @@ static void pn533_poll_create_mod_list(struct pn533 *dev,
 		pn533_poll_add_mod(dev, PN533_LISTEN_MOD);
 }
 
-static int pn533_start_poll_complete(struct pn533 *dev, void *arg,
-				     u8 *params, int params_len)
+static int pn533_start_poll_complete(struct pn533 *dev, u8 *params, int params_len)
 {
 	struct pn533_poll_response *resp;
 	int rc;
@@ -1304,8 +1307,7 @@ static void pn533_wq_tg_get_data(struct work_struct *work)
 }
 
 #define ATR_REQ_GB_OFFSET 17
-static int pn533_init_target_complete(struct pn533 *dev, void *arg,
-				      u8 *params, int params_len)
+static int pn533_init_target_complete(struct pn533 *dev, u8 *params, int params_len)
 {
 	struct pn533_cmd_init_target_response *resp;
 	u8 frame, comm_mode = NFC_COMM_PASSIVE, *gb;
@@ -1402,9 +1404,9 @@ static int pn533_poll_complete(struct pn533 *dev, void *arg,
 	if (cur_mod->len == 0) {
 		del_timer(&dev->listen_timer);
 
-		return pn533_init_target_complete(dev, arg, params, params_len);
+		return pn533_init_target_complete(dev, params, params_len);
 	} else {
-		rc = pn533_start_poll_complete(dev, arg, params, params_len);
+		rc = pn533_start_poll_complete(dev, params, params_len);
 		if (!rc)
 			return rc;
 	}
@@ -2373,9 +2375,9 @@ static int pn533_probe(struct usb_interface *interface,
 		goto error;
 	}
 
-	dev->in_frame = kmalloc(dev->in_maxlen, GFP_KERNEL);
+	dev->in_frame = kmalloc(PN533_NORMAL_FRAME_MAX_LEN, GFP_KERNEL);
 	dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
-	dev->out_frame = kmalloc(dev->out_maxlen, GFP_KERNEL);
+	dev->out_frame = kmalloc(PN533_NORMAL_FRAME_MAX_LEN, GFP_KERNEL);
 	dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
 
 	if (!dev->in_frame || !dev->out_frame ||

drivers/nfc/pn544/Makefile

+#
+# Makefile for PN544 HCI based NFC driver
+#
+
+obj-$(CONFIG_PN544_HCI_NFC)	+= pn544_i2c.o
+
+pn544_i2c-y		:= pn544.o i2c.o

drivers/nfc/pn544/i2c.c

+/*
+ * I2C Link Layer for PN544 HCI based Driver
+ *
+ * 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/crc-ccitt.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/gpio.h>
+#include <linux/miscdevice.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+
+#include <linux/nfc/pn544.h>
+
+#include <net/nfc/hci.h>
+#include <net/nfc/llc.h>
+
+#include "pn544.h"
+
+#define PN544_I2C_FRAME_HEADROOM 1
+#define PN544_I2C_FRAME_TAILROOM 2
+
+/* framing in HCI mode */
+#define PN544_HCI_I2C_LLC_LEN		1
+#define PN544_HCI_I2C_LLC_CRC		2
+#define PN544_HCI_I2C_LLC_LEN_CRC	(PN544_HCI_I2C_LLC_LEN + \
+					 PN544_HCI_I2C_LLC_CRC)
+#define PN544_HCI_I2C_LLC_MIN_SIZE	(1 + PN544_HCI_I2C_LLC_LEN_CRC)
+#define PN544_HCI_I2C_LLC_MAX_PAYLOAD	29
+#define PN544_HCI_I2C_LLC_MAX_SIZE	(PN544_HCI_I2C_LLC_LEN_CRC + 1 + \
+					 PN544_HCI_I2C_LLC_MAX_PAYLOAD)
+
+static struct i2c_device_id pn544_hci_i2c_id_table[] = {
+	{"pn544", 0},
+	{}
+};
+
+MODULE_DEVICE_TABLE(i2c, pn544_hci_i2c_id_table);
+
+#define PN544_HCI_I2C_DRIVER_NAME "pn544_hci_i2c"
+
+struct pn544_i2c_phy {
+	struct i2c_client *i2c_dev;
+	struct nfc_hci_dev *hdev;
+
+	unsigned int gpio_en;
+	unsigned int gpio_irq;
+	unsigned int gpio_fw;
+	unsigned int en_polarity;
+
+	int powered;
+
+	int hard_fault;		/*
+				 * < 0 if hardware error occured (e.g. i2c err)
+				 * and prevents normal operation.
+				 */
+};
+
+#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 void pn544_hci_i2c_platform_init(struct pn544_i2c_phy *phy)
+{
+	int polarity, retry, ret;
+	char rset_cmd[] = { 0x05, 0xF9, 0x04, 0x00, 0xC3, 0xE5 };
+	int count = sizeof(rset_cmd);
+
+	pr_info(DRIVER_DESC ": %s\n", __func__);
+	dev_info(&phy->i2c_dev->dev, "Detecting nfc_en polarity\n");
+
+	/* Disable fw download */
+	gpio_set_value(phy->gpio_fw, 0);
+
+	for (polarity = 0; polarity < 2; polarity++) {
+		phy->en_polarity = polarity;
+		retry = 3;
+		while (retry--) {
+			/* power off */
+			gpio_set_value(phy->gpio_en, !phy->en_polarity);
+			usleep_range(10000, 15000);
+
+			/* power on */
+			gpio_set_value(phy->gpio_en, phy->en_polarity);
+			usleep_range(10000, 15000);
+
+			/* send reset */
+			dev_dbg(&phy->i2c_dev->dev, "Sending reset cmd\n");
+			ret = i2c_master_send(phy->i2c_dev, rset_cmd, count);
+			if (ret == count) {
+				dev_info(&phy->i2c_dev->dev,
+					 "nfc_en polarity : active %s\n",
+					 (polarity == 0 ? "low" : "high"));
+				goto out;
+			}
+		}
+	}
+
+	dev_err(&phy->i2c_dev->dev,
+		"Could not detect nfc_en polarity, fallback to active high\n");
+
+out:
+	gpio_set_value(phy->gpio_en, !phy->en_polarity);
+}
+
+static int pn544_hci_i2c_enable(void *phy_id)
+{
+	struct pn544_i2c_phy *phy = phy_id;
+
+	pr_info(DRIVER_DESC ": %s\n", __func__);
+
+	gpio_set_value(phy->gpio_fw, 0);
+	gpio_set_value(phy->gpio_en, phy->en_polarity);
+	usleep_range(10000, 15000);
+
+	phy->powered = 1;
+
+	return 0;
+}
+
+static void pn544_hci_i2c_disable(void *phy_id)
+{
+	struct pn544_i2c_phy *phy = phy_id;
+
+	pr_info(DRIVER_DESC ": %s\n", __func__);
+
+	gpio_set_value(phy->gpio_fw, 0);
+	gpio_set_value(phy->gpio_en, !phy->en_polarity);
+	usleep_range(10000, 15000);
+
+	gpio_set_value(phy->gpio_en, phy->en_polarity);
+	usleep_range(10000, 15000);
+
+	gpio_set_value(phy->gpio_en, !phy->en_polarity);
+	usleep_range(10000, 15000);
+
+	phy->powered = 0;
+}
+
+static void pn544_hci_i2c_add_len_crc(struct sk_buff *skb)
+{
+	u16 crc;
+	int len;
+
+	len = skb->len + 2;
+	*skb_push(skb, 1) = len;
+
+	crc = crc_ccitt(0xffff, skb->data, skb->len);
+	crc = ~crc;
+	*skb_put(skb, 1) = crc & 0xff;
+	*skb_put(skb, 1) = crc >> 8;
+}
+
+static void pn544_hci_i2c_remove_len_crc(struct sk_buff *skb)
+{
+	skb_pull(skb, PN544_I2C_FRAME_HEADROOM);
+	skb_trim(skb, PN544_I2C_FRAME_TAILROOM);
+}
+
+/*
+ * 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 pn544_hci_i2c_write(void *phy_id, struct sk_buff *skb)
+{
+	int r;
+	struct pn544_i2c_phy *phy = phy_id;
+	struct i2c_client *client = phy->i2c_dev;
+
+	if (phy->hard_fault != 0)
+		return phy->hard_fault;
+
+	usleep_range(3000, 6000);
+
+	pn544_hci_i2c_add_len_crc(skb);
+
+	I2C_DUMP_SKB("i2c frame written", skb);
+
+	r = i2c_master_send(client, skb->data, skb->len);
+
+	if (r == -EREMOTEIO) {	/* Retry, chip was in standby */
+		usleep_range(6000, 10000);
+		r = i2c_master_send(client, skb->data, skb->len);
+	}
+
+	if (r >= 0) {
+		if (r != skb->len)
+			r = -EREMOTEIO;
+		else
+			r = 0;
+	}
+
+	pn544_hci_i2c_remove_len_crc(skb);
+
+	return r;
+}
+
+static int check_crc(u8 *buf, int buflen)
+{
+	int len;
+	u16 crc;
+
+	len = buf[0] + 1;
+	crc = crc_ccitt(0xffff, buf, len - 2);
+	crc = ~crc;
+
+	if (buf[len - 2] != (crc & 0xff) || buf[len - 1] != (crc >> 8)) {
+		pr_err(PN544_HCI_I2C_DRIVER_NAME
+		       ": CRC error 0x%x != 0x%x 0x%x\n",
+		       crc, buf[len - 1], buf[len - 2]);
+
+		pr_info(DRIVER_DESC ": %s : BAD CRC\n", __func__);
+		print_hex_dump(KERN_DEBUG, "crc: ", DUMP_PREFIX_NONE,
+			       16, 2, buf, buflen, false);
+		return -EPERM;
+	}
+	return 0;
+}
+
+/*
+ * Reads an shdlc frame and returns it in a newly allocated sk_buff. Guarantees
+ * that i2c bus will be flushed and that next read will start on a new frame.
+ * returned skb contains only LLC header and payload.
+ * returns:
+ * -EREMOTEIO : i2c read error (fatal)
+ * -EBADMSG : frame was incorrect and discarded
+ * -ENOMEM : cannot allocate skb, frame dropped
+ */
+static int pn544_hci_i2c_read(struct pn544_i2c_phy *phy, struct sk_buff **skb)
+{
+	int r;
+	u8 len;
+	u8 tmp[PN544_HCI_I2C_LLC_MAX_SIZE - 1];
+	struct i2c_client *client = phy->i2c_dev;
+
+	r = i2c_master_recv(client, &len, 1);
+	if (r != 1) {
+		dev_err(&client->dev, "cannot read len byte\n");
+		return -EREMOTEIO;
+	}
+
+	if ((len < (PN544_HCI_I2C_LLC_MIN_SIZE - 1)) ||
+	    (len > (PN544_HCI_I2C_LLC_MAX_SIZE - 1))) {
+		dev_err(&client->dev, "invalid len byte\n");
+		r = -EBADMSG;
+		goto flush;
+	}
+
+	*skb = alloc_skb(1 + len, GFP_KERNEL);
+	if (*skb == NULL) {
+		r = -ENOMEM;
+		goto flush;
+	}
+
+	*skb_put(*skb, 1) = len;
+
+	r = i2c_master_recv(client, skb_put(*skb, len), len);
+	if (r != len) {
+		kfree_skb(*skb);
+		return -EREMOTEIO;
+	}
+
+	I2C_DUMP_SKB("i2c frame read", *skb);
+
+	r = check_crc((*skb)->data, (*skb)->len);
+	if (r != 0) {
+		kfree_skb(*skb);
+		r = -EBADMSG;
+		goto flush;
+	}
+
+	skb_pull(*skb, 1);
+	skb_trim(*skb, (*skb)->len - 2);
+
+	usleep_range(3000, 6000);
+
+	return 0;
+
+flush:
+	if (i2c_master_recv(client, tmp, sizeof(tmp)) < 0)
+		r = -EREMOTEIO;
+
+	usleep_range(3000, 6000);
+
+	return r;
+}
+
+/*
+ * Reads an shdlc frame from the chip. This is not as straightforward as it
+ * seems. There are cases where we could loose the frame start synchronization.
+ * The frame format is len-data-crc, and corruption can occur anywhere while
+ * transiting on i2c bus, such that we could read an invalid len.
+ * In order to recover synchronization with the next frame, we must be sure
+ * to read the real amount of data without using the len byte. We do this by
+ * assuming the following:
+ * - the chip will always present only one single complete frame on the bus
+ *   before triggering the interrupt
+ * - the chip will not present a new frame until we have completely read
+ *   the previous one (or until we have handled the interrupt).
+ * The tricky case is when we read a corrupted len that is less than the real
+ * len. We must detect this here in order to determine that we need to flush
+ * the bus. This is the reason why we check the crc here.
+ */
+static irqreturn_t pn544_hci_i2c_irq_thread_fn(int irq, void *phy_id)
+{
+	struct pn544_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 != 0)
+		return IRQ_HANDLED;
+
+	r = pn544_hci_i2c_read(phy, &skb);
+	if (r == -EREMOTEIO) {
+		phy->hard_fault = r;
+
+		nfc_hci_recv_frame(phy->hdev, NULL);
+
+		return IRQ_HANDLED;
+	} else if ((r == -ENOMEM) || (r == -EBADMSG)) {
+		return IRQ_HANDLED;
+	}
+
+	nfc_hci_recv_frame(phy->hdev, skb);
+
+	return IRQ_HANDLED;
+}
+
+static struct nfc_phy_ops i2c_phy_ops = {
+	.write = pn544_hci_i2c_write,
+	.enable = pn544_hci_i2c_enable,
+	.disable = pn544_hci_i2c_disable,
+};
+
+static int __devinit pn544_hci_i2c_probe(struct i2c_client *client,
+				     const struct i2c_device_id *id)
+{
+	struct pn544_i2c_phy *phy;
+	struct pn544_nfc_platform_data *pdata;
+	int r = 0;
+
+	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)) {
+		dev_err(&client->dev, "Need I2C_FUNC_I2C\n");
+		return -ENODEV;
+	}
+
+	phy = kzalloc(sizeof(struct pn544_i2c_phy), GFP_KERNEL);
+	if (!phy) {
+		dev_err(&client->dev,
+			"Cannot allocate memory for pn544 i2c phy.\n");
+		r = -ENOMEM;
+		goto err_phy_alloc;
+	}
+
+	phy->i2c_dev = client;
+	i2c_set_clientdata(client, phy);
+
+	pdata = client->dev.platform_data;
+	if (pdata == NULL) {
+		dev_err(&client->dev, "No platform data\n");
+		r = -EINVAL;
+		goto err_pdata;
+	}
+
+	if (pdata->request_resources == NULL) {
+		dev_err(&client->dev, "request_resources() missing\n");
+		r = -EINVAL;
+		goto err_pdata;
+	}
+
+	r = pdata->request_resources(client);
+	if (r) {
+		dev_err(&client->dev, "Cannot get platform resources\n");
+		goto err_pdata;
+	}
+
+	phy->gpio_en = pdata->get_gpio(NFC_GPIO_ENABLE);
+	phy->gpio_fw = pdata->get_gpio(NFC_GPIO_FW_RESET);
+	phy->gpio_irq = pdata->get_gpio(NFC_GPIO_IRQ);
+
+	pn544_hci_i2c_platform_init(phy);
+
+	r = request_threaded_irq(client->irq, NULL, pn544_hci_i2c_irq_thread_fn,
+				 IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+				 PN544_HCI_I2C_DRIVER_NAME, phy);
+	if (r < 0) {
+		dev_err(&client->dev, "Unable to register IRQ handler\n");
+		goto err_rti;
+	}
+
+	r = pn544_hci_probe(phy, &i2c_phy_ops, LLC_SHDLC_NAME,
+			    PN544_I2C_FRAME_HEADROOM, PN544_I2C_FRAME_TAILROOM,
+			    PN544_HCI_I2C_LLC_MAX_PAYLOAD, &phy->hdev);
+	if (r < 0)
+		goto err_hci;
+
+	return 0;
+
+err_hci:
+	free_irq(client->irq, phy);
+
+err_rti:
+	if (pdata->free_resources != NULL)
+		pdata->free_resources();
+
+err_pdata:
+	kfree(phy);
+
+err_phy_alloc:
+	return r;
+}
+
+static __devexit int pn544_hci_i2c_remove(struct i2c_client *client)
+{
+	struct pn544_i2c_phy *phy = i2c_get_clientdata(client);
+	struct pn544_nfc_platform_data *pdata = client->dev.platform_data;
+
+	dev_dbg(&client->dev, "%s\n", __func__);
+
+	pn544_hci_remove(phy->hdev);
+
+	if (phy->powered)
+		pn544_hci_i2c_disable(phy);
+
+	free_irq(client->irq, phy);
+	if (pdata->free_resources)
+		pdata->free_resources();
+
+	kfree(phy);
+
+	return 0;
+}
+
+static struct i2c_driver pn544_hci_i2c_driver = {
+	.driver = {
+		   .name = PN544_HCI_I2C_DRIVER_NAME,
+		  },
+	.probe = pn544_hci_i2c_probe,
+	.id_table = pn544_hci_i2c_id_table,
+	.remove = __devexit_p(pn544_hci_i2c_remove),
+};
+
+static int __init pn544_hci_i2c_init(void)
+{
+	int r;
+
+	pr_debug(DRIVER_DESC ": %s\n", __func__);
+
+	r = i2c_add_driver(&pn544_hci_i2c_driver);
+	if (r) {
+		pr_err(PN544_HCI_I2C_DRIVER_NAME
+		       ": driver registration failed\n");
+		return r;
+	}
+
+	return 0;
+}
+
+static void __exit pn544_hci_i2c_exit(void)
+{
+	i2c_del_driver(&pn544_hci_i2c_driver);
+}
+
+module_init(pn544_hci_i2c_init);
+module_exit(pn544_hci_i2c_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION(DRIVER_DESC);

drivers/nfc/pn544/pn544.h

+/*
+ * Copyright (C) 2011 - 2012  Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ */
+
+#ifndef __LOCAL_PN544_H_
+#define __LOCAL_PN544_H_
+
+#include <net/nfc/hci.h>
+
+#define DRIVER_DESC "HCI NFC driver for PN544"
+
+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);
+void pn544_hci_remove(struct nfc_hci_dev *hdev);
+
+#endif /* __LOCAL_PN544_H_ */

include/net/nfc/hci.h

@@ -24,6 +24,12 @@
 
 #include <net/nfc/nfc.h>
 
+struct nfc_phy_ops {
+	int (*write)(void *dev_id, struct sk_buff *skb);
+	int (*enable)(void *dev_id);
+	void (*disable)(void *dev_id);
+};
+
 struct nfc_hci_dev;
 
 struct nfc_hci_ops {
@@ -38,15 +44,21 @@ 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);
+	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);
 	int (*target_from_gate) (struct nfc_hci_dev *hdev, u8 gate,
 				 struct nfc_target *target);
 	int (*complete_target_discovered) (struct nfc_hci_dev *hdev, u8 gate,
 					   struct nfc_target *target);
-	int (*data_exchange) (struct nfc_hci_dev *hdev,
+	int (*im_transceive) (struct nfc_hci_dev *hdev,
 			      struct nfc_target *target, struct sk_buff *skb,
 			      data_exchange_cb_t cb, void *cb_context);
+	int (*tm_send)(struct nfc_hci_dev *hdev, struct sk_buff *skb);
 	int (*check_presence)(struct nfc_hci_dev *hdev,
 			      struct nfc_target *target);
+	void (*event_received)(struct nfc_hci_dev *hdev, u8 gate, u8 event,
+				struct sk_buff *skb);
 };
 
 /* Pipes */
@@ -114,6 +126,9 @@ struct nfc_hci_dev {
 	int async_cb_type;
 	data_exchange_cb_t async_cb;
 	void *async_cb_context;
+
+	u8 *gb;
+	size_t gb_len;
 };
 
 /* hci device allocation */
@@ -219,5 +234,6 @@ int nfc_hci_send_response(struct nfc_hci_dev *hdev, u8 gate, u8 response,
 			  const u8 *param, size_t param_len);
 int nfc_hci_send_event(struct nfc_hci_dev *hdev, u8 gate, u8 event,
 		       const u8 *param, size_t param_len);
+int nfc_hci_target_discovered(struct nfc_hci_dev *hdev, u8 gate);
 
 #endif /* __NET_HCI_H */

include/net/nfc/nfc.h

@@ -95,7 +95,7 @@ struct nfc_genl_data {
 };
 
 struct nfc_dev {
-	unsigned int idx;
+	int idx;
 	u32 target_next_idx;
 	struct nfc_target *targets;
 	int n_targets;

include/uapi/linux/nfc.h

@@ -60,6 +60,13 @@
  *      target mode.
  * @NFC_EVENT_DEVICE_DEACTIVATED: event emitted when the adapter is deactivated
  *      from target mode.
+ * @NFC_CMD_LLC_GET_PARAMS: request LTO, RW, and MIUX parameters for a device
+ * @NFC_CMD_LLC_SET_PARAMS: set one or more of LTO, RW, and MIUX parameters for
+ *	a device. LTO must be set before the link is up otherwise -EINPROGRESS
+ *	is returned. RW and MIUX can be set at anytime and will be passed in
+ *	subsequent CONNECT and CC messages.
+ *	If one of the passed parameters is wrong none is set and -EINVAL is
+ *	returned.
  */
 enum nfc_commands {
 	NFC_CMD_UNSPEC,
@@ -77,6 +84,8 @@ enum nfc_commands {
 	NFC_EVENT_TARGET_LOST,
 	NFC_EVENT_TM_ACTIVATED,
 	NFC_EVENT_TM_DEACTIVATED,
+	NFC_CMD_LLC_GET_PARAMS,
+	NFC_CMD_LLC_SET_PARAMS,
 /* private: internal use only */
 	__NFC_CMD_AFTER_LAST
 };
@@ -102,6 +111,9 @@ enum nfc_commands {
  * @NFC_ATTR_RF_MODE: Initiator or target
  * @NFC_ATTR_IM_PROTOCOLS: Initiator mode protocols to poll for
  * @NFC_ATTR_TM_PROTOCOLS: Target mode protocols to listen for
+ * @NFC_ATTR_LLC_PARAM_LTO: Link TimeOut parameter
+ * @NFC_ATTR_LLC_PARAM_RW: Receive Window size parameter
+ * @NFC_ATTR_LLC_PARAM_MIUX: MIU eXtension parameter
  */
 enum nfc_attrs {
 	NFC_ATTR_UNSPEC,
@@ -119,6 +131,9 @@ enum nfc_attrs {
 	NFC_ATTR_DEVICE_POWERED,
 	NFC_ATTR_IM_PROTOCOLS,
 	NFC_ATTR_TM_PROTOCOLS,
+	NFC_ATTR_LLC_PARAM_LTO,
+	NFC_ATTR_LLC_PARAM_RW,
+	NFC_ATTR_LLC_PARAM_MIUX,
 /* private: internal use only */
 	__NFC_ATTR_AFTER_LAST
 };

net/nfc/Kconfig

@@ -3,8 +3,8 @@
 #
 
 menuconfig NFC
-	depends on NET && EXPERIMENTAL
-	tristate "NFC subsystem support (EXPERIMENTAL)"
+	depends on NET
+	tristate "NFC subsystem support"
 	default n
 	help
 	  Say Y here if you want to build support for NFC (Near field

net/nfc/core.c

@@ -40,6 +40,9 @@
 int nfc_devlist_generation;
 DEFINE_MUTEX(nfc_devlist_mutex);
 
+/* NFC device ID bitmap */
+static DEFINE_IDA(nfc_index_ida);
+
 /**
  * nfc_dev_up - turn on the NFC device
  *
@@ -181,6 +184,7 @@ int nfc_stop_poll(struct nfc_dev *dev)
 
 	dev->ops->stop_poll(dev);
 	dev->polling = false;
+	dev->rf_mode = NFC_RF_NONE;
 
 error:
 	device_unlock(&dev->dev);
@@ -194,7 +198,7 @@ static struct nfc_target *nfc_find_target(struct nfc_dev *dev, u32 target_idx)
 	if (dev->n_targets == 0)
 		return NULL;
 
-	for (i = 0; i < dev->n_targets ; i++) {
+	for (i = 0; i < dev->n_targets; i++) {
 		if (dev->targets[i].idx == target_idx)
 			return &dev->targets[i];
 	}
@@ -274,12 +278,14 @@ int nfc_dep_link_down(struct nfc_dev *dev)
 	if (!rc) {
 		dev->dep_link_up = false;
 		dev->active_target = NULL;
+		dev->rf_mode = NFC_RF_NONE;
 		nfc_llcp_mac_is_down(dev);
 		nfc_genl_dep_link_down_event(dev);
 	}
 
 error:
 	device_unlock(&dev->dev);
+
 	return rc;
 }
 
@@ -503,6 +509,7 @@ EXPORT_SYMBOL(nfc_tm_activated);
 int nfc_tm_deactivated(struct nfc_dev *dev)
 {
 	dev->dep_link_up = false;
+	dev->rf_mode = NFC_RF_NONE;
 
 	return nfc_genl_tm_deactivated(dev);
 }
@@ -697,6 +704,8 @@ static void nfc_check_pres_work(struct work_struct *work)
 
 	if (dev->active_target && timer_pending(&dev->check_pres_timer) == 0) {
 		rc = dev->ops->check_presence(dev, dev->active_target);
+		if (rc == -EOPNOTSUPP)
+			goto exit;
 		if (!rc) {
 			mod_timer(&dev->check_pres_timer, jiffies +
 				  msecs_to_jiffies(NFC_CHECK_PRES_FREQ_MS));
@@ -708,6 +717,7 @@ static void nfc_check_pres_work(struct work_struct *work)
 		}
 	}
 
+exit:
 	device_unlock(&dev->dev);
 }
 
@@ -753,7 +763,6 @@ struct nfc_dev *nfc_allocate_device(struct nfc_ops *ops,
 				    u32 supported_protocols,
 				    int tx_headroom, int tx_tailroom)
 {
-	static atomic_t dev_no = ATOMIC_INIT(0);
 	struct nfc_dev *dev;
 
 	if (!ops->start_poll || !ops->stop_poll || !ops->activate_target ||
@@ -767,11 +776,6 @@ struct nfc_dev *nfc_allocate_device(struct nfc_ops *ops,
 	if (!dev)
 		return NULL;
 
-	dev->dev.class = &nfc_class;
-	dev->idx = atomic_inc_return(&dev_no) - 1;
-	dev_set_name(&dev->dev, "nfc%d", dev->idx);
-	device_initialize(&dev->dev);
-
 	dev->ops = ops;
 	dev->supported_protocols = supported_protocols;
 	dev->tx_headroom = tx_headroom;
@@ -779,6 +783,7 @@ struct nfc_dev *nfc_allocate_device(struct nfc_ops *ops,
 
 	nfc_genl_data_init(&dev->genl_data);
 
+	dev->rf_mode = NFC_RF_NONE;
 
 	/* first generation must not be 0 */
 	dev->targets_generation = 1;
@@ -806,6 +811,14 @@ int nfc_register_device(struct nfc_dev *dev)
 
 	pr_debug("dev_name=%s\n", dev_name(&dev->dev));
 
+	dev->idx = ida_simple_get(&nfc_index_ida, 0, 0, GFP_KERNEL);
+	if (dev->idx < 0)
+		return dev->idx;
+
+	dev->dev.class = &nfc_class;
+	dev_set_name(&dev->dev, "nfc%d", dev->idx);
+	device_initialize(&dev->dev);
+
 	mutex_lock(&nfc_devlist_mutex);
 	nfc_devlist_generation++;
 	rc = device_add(&dev->dev);
@@ -834,10 +847,12 @@ EXPORT_SYMBOL(nfc_register_device);
  */
 void nfc_unregister_device(struct nfc_dev *dev)
 {
-	int rc;
+	int rc, id;
 
 	pr_debug("dev_name=%s\n", dev_name(&dev->dev));
 
+	id = dev->idx;
+
 	mutex_lock(&nfc_devlist_mutex);
 	nfc_devlist_generation++;
 
@@ -856,6 +871,8 @@ void nfc_unregister_device(struct nfc_dev *dev)
 		pr_debug("The userspace won't be notified that the device %s was removed\n",
 			 dev_name(&dev->dev));
 
+	ida_simple_remove(&nfc_index_ida, id);
+
 }
 EXPORT_SYMBOL(nfc_unregister_device);
 

net/nfc/hci/command.c

@@ -257,7 +257,9 @@ static u8 nfc_hci_create_pipe(struct nfc_hci_dev *hdev, u8 dest_host,
 	*result = nfc_hci_execute_cmd(hdev, NFC_HCI_ADMIN_PIPE,
 				      NFC_HCI_ADM_CREATE_PIPE,
 				      (u8 *) &params, sizeof(params), &skb);
-	if (*result == 0) {
+	if (*result < 0)
+		return NFC_HCI_INVALID_PIPE;
+
 	resp = (struct hci_create_pipe_resp *)skb->data;
 	pipe = resp->pipe;
 	kfree_skb(skb);
@@ -265,8 +267,6 @@ static u8 nfc_hci_create_pipe(struct nfc_hci_dev *hdev, u8 dest_host,
 	pr_debug("pipe created=%d\n", pipe);
 
 	return pipe;
-	} else
-		return NFC_HCI_INVALID_PIPE;
 }
 
 static int nfc_hci_delete_pipe(struct nfc_hci_dev *hdev, u8 pipe)
@@ -279,8 +279,6 @@ static int nfc_hci_delete_pipe(struct nfc_hci_dev *hdev, u8 pipe)
 
 static int nfc_hci_clear_all_pipes(struct nfc_hci_dev *hdev)
 {
-	int r;
-
 	u8 param[2];
 
 	/* TODO: Find out what the identity reference data is
@@ -288,10 +286,8 @@ static int nfc_hci_clear_all_pipes(struct nfc_hci_dev *hdev)
 
 	pr_debug("\n");
 
-	r = nfc_hci_execute_cmd(hdev, NFC_HCI_ADMIN_PIPE,
+	return nfc_hci_execute_cmd(hdev, NFC_HCI_ADMIN_PIPE,
 				   NFC_HCI_ADM_CLEAR_ALL_PIPE, param, 2, NULL);
-
-	return 0;
 }
 
 int nfc_hci_disconnect_gate(struct nfc_hci_dev *hdev, u8 gate)

net/nfc/hci/core.c

@@ -65,9 +65,10 @@ static void nfc_hci_msg_tx_work(struct work_struct *work)
 							  -ETIME);
 			kfree(hdev->cmd_pending_msg);
 			hdev->cmd_pending_msg = NULL;
-		} else
+		} else {
 			goto exit;
 		}
+	}
 
 next_msg:
 	if (list_empty(&hdev->msg_tx_queue))
@@ -182,7 +183,7 @@ static u32 nfc_hci_sak_to_protocol(u8 sak)
 	}
 }
 
-static int nfc_hci_target_discovered(struct nfc_hci_dev *hdev, u8 gate)
+int nfc_hci_target_discovered(struct nfc_hci_dev *hdev, u8 gate)
 {
 	struct nfc_target *targets;
 	struct sk_buff *atqa_skb = NULL;
@@ -263,6 +264,8 @@ static int nfc_hci_target_discovered(struct nfc_hci_dev *hdev, u8 gate)
 		break;
 	}
 
+	/* if driver set the new gate, we will skip the old one */
+	if (targets->hci_reader_gate == 0x00)
 		targets->hci_reader_gate = gate;
 
 	r = nfc_targets_found(hdev->ndev, targets, 1);
@@ -275,6 +278,7 @@ static int nfc_hci_target_discovered(struct nfc_hci_dev *hdev, u8 gate)
 
 	return r;
 }
+EXPORT_SYMBOL(nfc_hci_target_discovered);
 
 void nfc_hci_event_received(struct nfc_hci_dev *hdev, u8 pipe, u8 event,
 			    struct sk_buff *skb)
@@ -307,8 +311,13 @@ void nfc_hci_event_received(struct nfc_hci_dev *hdev, u8 pipe, u8 event,
 					      nfc_hci_pipe2gate(hdev, pipe));
 		break;
 	default:
-		/* TODO: Unknown events are hardware specific
-		 * pass them to the driver (needs a new hci_ops) */
+		if (hdev->ops->event_received) {
+			hdev->ops->event_received(hdev,
+						nfc_hci_pipe2gate(hdev, pipe),
+						event, skb);
+			return;
+		}
+
 		break;
 	}
 
@@ -527,7 +536,8 @@ static int hci_start_poll(struct nfc_dev *nfc_dev,
 		return hdev->ops->start_poll(hdev, im_protocols, tm_protocols);
 	else
 		return nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE,
-				       NFC_HCI_EVT_READER_REQUESTED, NULL, 0);
+					  NFC_HCI_EVT_READER_REQUESTED,
+					  NULL, 0);
 }
 
 static void hci_stop_poll(struct nfc_dev *nfc_dev)
@@ -538,6 +548,28 @@ static void hci_stop_poll(struct nfc_dev *nfc_dev)
 			   NFC_HCI_EVT_END_OPERATION, NULL, 0);
 }
 
+static int hci_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
+				__u8 comm_mode, __u8 *gb, size_t gb_len)
+{
+	struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
+
+	if (hdev->ops->dep_link_up)
+		return hdev->ops->dep_link_up(hdev, target, comm_mode,
+						gb, gb_len);
+
+	return 0;
+}
+
+static int hci_dep_link_down(struct nfc_dev *nfc_dev)
+{
+	struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
+
+	if (hdev->ops->dep_link_down)
+		return hdev->ops->dep_link_down(hdev);
+
+	return 0;
+}
+
 static int hci_activate_target(struct nfc_dev *nfc_dev,
 			       struct nfc_target *target, u32 protocol)
 {
@@ -586,8 +618,8 @@ static int hci_transceive(struct nfc_dev *nfc_dev, struct nfc_target *target,
 	switch (target->hci_reader_gate) {
 	case NFC_HCI_RF_READER_A_GATE:
 	case NFC_HCI_RF_READER_B_GATE:
-		if (hdev->ops->data_exchange) {
-			r = hdev->ops->data_exchange(hdev, target, skb, cb,
+		if (hdev->ops->im_transceive) {
+			r = hdev->ops->im_transceive(hdev, target, skb, cb,
 						     cb_context);
 			if (r <= 0)	/* handled */
 				break;
@@ -604,14 +636,14 @@ static int hci_transceive(struct nfc_dev *nfc_dev, struct nfc_target *target,
 					   skb->len, hci_transceive_cb, hdev);
 		break;
 	default:
-		if (hdev->ops->data_exchange) {
-			r = hdev->ops->data_exchange(hdev, target, skb, cb,
+		if (hdev->ops->im_transceive) {
+			r = hdev->ops->im_transceive(hdev, target, skb, cb,
 						     cb_context);
 			if (r == 1)
 				r = -ENOTSUPP;
-		}
-		else
+		} else {
 			r = -ENOTSUPP;
+		}
 		break;
 	}
 
@@ -620,6 +652,16 @@ static int hci_transceive(struct nfc_dev *nfc_dev, struct nfc_target *target,
 	return r;
 }
 
+static int hci_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
+{
+	struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
+
+	if (hdev->ops->tm_send)
+		return hdev->ops->tm_send(hdev, skb);
+	else
+		return -ENOTSUPP;
+}
+
 static int hci_check_presence(struct nfc_dev *nfc_dev,
 			      struct nfc_target *target)
 {
@@ -723,9 +765,12 @@ static struct nfc_ops hci_nfc_ops = {
 	.dev_down = hci_dev_down,
 	.start_poll = hci_start_poll,
 	.stop_poll = hci_stop_poll,
+	.dep_link_up = hci_dep_link_up,
+	.dep_link_down = hci_dep_link_down,
 	.activate_target = hci_activate_target,
 	.deactivate_target = hci_deactivate_target,
 	.im_transceive = hci_transceive,
+	.tm_send = hci_tm_send,
 	.check_presence = hci_check_presence,
 };
 
@@ -848,7 +893,7 @@ void nfc_hci_driver_failure(struct nfc_hci_dev *hdev, int err)
 }
 EXPORT_SYMBOL(nfc_hci_driver_failure);
 
-void inline nfc_hci_recv_frame(struct nfc_hci_dev *hdev, struct sk_buff *skb)
+void nfc_hci_recv_frame(struct nfc_hci_dev *hdev, struct sk_buff *skb)
 {
 	nfc_llc_rcv_from_drv(hdev->llc, skb);
 }

net/nfc/hci/llc.c

@@ -72,7 +72,7 @@ int nfc_llc_register(const char *name, struct nfc_llc_ops *ops)
 	llc_engine->ops = ops;
 
 	INIT_LIST_HEAD(&llc_engine->entry);
-	list_add_tail (&llc_engine->entry, &llc_engines);
+	list_add_tail(&llc_engine->entry, &llc_engines);
 
 	return 0;
 }

net/nfc/hci/llc_shdlc.c

@@ -634,9 +634,9 @@ static void llc_shdlc_sm_work(struct work_struct *work)
 			r = llc_shdlc_connect_initiate(shdlc);
 		else
 			r = -ETIME;
-		if (r < 0)
+		if (r < 0) {
 			llc_shdlc_connect_complete(shdlc, r);
-		else {
+		} else {
 			mod_timer(&shdlc->connect_timer, jiffies +
 				  msecs_to_jiffies(SHDLC_CONNECT_VALUE_MS));
 
@@ -682,9 +682,8 @@ static void llc_shdlc_sm_work(struct work_struct *work)
 			llc_shdlc_handle_send_queue(shdlc);
 		}
 
-		if (shdlc->hard_fault) {
+		if (shdlc->hard_fault)
 			shdlc->llc_failure(shdlc->hdev, shdlc->hard_fault);
-		}
 		break;
 	default:
 		break;

net/nfc/llcp/Kconfig

 config NFC_LLCP
-       depends on NFC && EXPERIMENTAL
-       bool "NFC LLCP support (EXPERIMENTAL)"
+       depends on NFC
+       bool "NFC LLCP support"
        default n
        help
 	 Say Y here if you want to build support for a kernel NFC LLCP

net/nfc/llcp/commands.c

@@ -261,7 +261,6 @@ int nfc_llcp_disconnect(struct nfc_llcp_sock *sock)
 	struct sk_buff *skb;
 	struct nfc_dev *dev;
 	struct nfc_llcp_local *local;
-	u16 size = 0;
 
 	pr_debug("Sending DISC\n");
 
@@ -273,17 +272,10 @@ int nfc_llcp_disconnect(struct nfc_llcp_sock *sock)
 	if (dev == NULL)
 		return -ENODEV;
 
-	size += LLCP_HEADER_SIZE;
-	size += dev->tx_headroom + dev->tx_tailroom + NFC_HEADER_SIZE;
-
-	skb = alloc_skb(size, GFP_ATOMIC);
+	skb = llcp_allocate_pdu(sock, LLCP_PDU_DISC, 0);
 	if (skb == NULL)
 		return -ENOMEM;
 
-	skb_reserve(skb, dev->tx_headroom + NFC_HEADER_SIZE);
-
-	skb = llcp_add_header(skb, sock->dsap, sock->ssap, LLCP_PDU_DISC);
-
 	skb_queue_tail(&local->tx_queue, skb);
 
 	return 0;
@@ -324,8 +316,7 @@ int nfc_llcp_send_connect(struct nfc_llcp_sock *sock)
 	struct sk_buff *skb;
 	u8 *service_name_tlv = NULL, service_name_tlv_length;
 	u8 *miux_tlv = NULL, miux_tlv_length;
-	u8 *rw_tlv = NULL, rw_tlv_length, rw;
-	__be16 miux;
+	u8 *rw_tlv = NULL, rw_tlv_length;
 	int err;
 	u16 size = 0;
 
@@ -343,13 +334,11 @@ int nfc_llcp_send_connect(struct nfc_llcp_sock *sock)
 		size += service_name_tlv_length;
 	}
 
-	miux = cpu_to_be16(LLCP_MAX_MIUX);
-	miux_tlv = nfc_llcp_build_tlv(LLCP_TLV_MIUX, (u8 *)&miux, 0,
+	miux_tlv = nfc_llcp_build_tlv(LLCP_TLV_MIUX, (u8 *)&local->miux, 0,
 				      &miux_tlv_length);
 	size += miux_tlv_length;
 
-	rw = LLCP_MAX_RW;
-	rw_tlv = nfc_llcp_build_tlv(LLCP_TLV_RW, &rw, 0, &rw_tlv_length);
+	rw_tlv = nfc_llcp_build_tlv(LLCP_TLV_RW, &local->rw, 0, &rw_tlv_length);
 	size += rw_tlv_length;
 
 	pr_debug("SKB size %d SN length %zu\n", size, sock->service_name_len);
@@ -386,8 +375,7 @@ int nfc_llcp_send_cc(struct nfc_llcp_sock *sock)
 	struct nfc_llcp_local *local;
 	struct sk_buff *skb;
 	u8 *miux_tlv = NULL, miux_tlv_length;
-	u8 *rw_tlv = NULL, rw_tlv_length, rw;
-	__be16 miux;
+	u8 *rw_tlv = NULL, rw_tlv_length;
 	int err;
 	u16 size = 0;
 
@@ -397,13 +385,11 @@ int nfc_llcp_send_cc(struct nfc_llcp_sock *sock)
 	if (local == NULL)
 		return -ENODEV;
 
-	miux = cpu_to_be16(LLCP_MAX_MIUX);
-	miux_tlv = nfc_llcp_build_tlv(LLCP_TLV_MIUX, (u8 *)&miux, 0,
+	miux_tlv = nfc_llcp_build_tlv(LLCP_TLV_MIUX, (u8 *)&local->miux, 0,
 				      &miux_tlv_length);
 	size += miux_tlv_length;
 
-	rw = LLCP_MAX_RW;
-	rw_tlv = nfc_llcp_build_tlv(LLCP_TLV_RW, &rw, 0, &rw_tlv_length);
+	rw_tlv = nfc_llcp_build_tlv(LLCP_TLV_RW, &local->rw, 0, &rw_tlv_length);
 	size += rw_tlv_length;
 
 	skb = llcp_allocate_pdu(sock, LLCP_PDU_CC, size);
@@ -428,6 +414,52 @@ int nfc_llcp_send_cc(struct nfc_llcp_sock *sock)
 	return err;
 }
 
+int nfc_llcp_send_snl(struct nfc_llcp_local *local, u8 tid, u8 sap)
+{
+	struct sk_buff *skb;
+	struct nfc_dev *dev;
+	u8 *sdres_tlv = NULL, sdres_tlv_length, sdres[2];
+	u16 size = 0;
+
+	pr_debug("Sending SNL tid 0x%x sap 0x%x\n", tid, sap);
+
+	if (local == NULL)
+		return -ENODEV;
+
+	dev = local->dev;
+	if (dev == NULL)
+		return -ENODEV;
+
+	sdres[0] = tid;
+	sdres[1] = sap;
+	sdres_tlv = nfc_llcp_build_tlv(LLCP_TLV_SDRES, sdres, 0,
+				       &sdres_tlv_length);
+	if (sdres_tlv == NULL)
+		return -ENOMEM;
+
+	size += LLCP_HEADER_SIZE;
+	size += dev->tx_headroom + dev->tx_tailroom + NFC_HEADER_SIZE;
+	size += sdres_tlv_length;
+
+	skb = alloc_skb(size, GFP_KERNEL);
+	if (skb == NULL) {
+		kfree(sdres_tlv);
+		return -ENOMEM;
+	}
+
+	skb_reserve(skb, dev->tx_headroom + NFC_HEADER_SIZE);
+
+	skb = llcp_add_header(skb, LLCP_SAP_SDP, LLCP_SAP_SDP, LLCP_PDU_SNL);
+
+	memcpy(skb_put(skb, sdres_tlv_length), sdres_tlv, sdres_tlv_length);
+
+	skb_queue_tail(&local->tx_queue, skb);
+
+	kfree(sdres_tlv);
+
+	return 0;
+}
+
 int nfc_llcp_send_dm(struct nfc_llcp_local *local, u8 ssap, u8 dsap, u8 reason)
 {
 	struct sk_buff *skb;
@@ -541,6 +573,52 @@ int nfc_llcp_send_i_frame(struct nfc_llcp_sock *sock,
 	return len;
 }
 
+int nfc_llcp_send_ui_frame(struct nfc_llcp_sock *sock, u8 ssap, u8 dsap,
+			   struct msghdr *msg, size_t len)
+{
+	struct sk_buff *pdu;
+	struct nfc_llcp_local *local;
+	size_t frag_len = 0, remaining_len;
+	u8 *msg_ptr;
+	int err;
+
+	pr_debug("Send UI frame len %zd\n", len);
+
+	local = sock->local;
+	if (local == NULL)
+		return -ENODEV;
+
+	remaining_len = len;
+	msg_ptr = (u8 *) msg->msg_iov;
+
+	while (remaining_len > 0) {
+
+		frag_len = min_t(size_t, sock->miu, remaining_len);
+
+		pr_debug("Fragment %zd bytes remaining %zd",
+			 frag_len, remaining_len);
+
+		pdu = nfc_alloc_send_skb(sock->dev, &sock->sk, MSG_DONTWAIT,
+					 frag_len + LLCP_HEADER_SIZE, &err);
+		if (pdu == NULL) {
+			pr_err("Could not allocate PDU\n");
+			continue;
+		}
+
+		pdu = llcp_add_header(pdu, dsap, ssap, LLCP_PDU_UI);
+
+		memcpy(skb_put(pdu, frag_len), msg_ptr, frag_len);
+
+		/* No need to check for the peer RW for UI frames */
+		skb_queue_tail(&local->tx_queue, pdu);
+
+		remaining_len -= frag_len;
+		msg_ptr += frag_len;
+	}
+
+	return len;
+}
+
 int nfc_llcp_send_rr(struct nfc_llcp_sock *sock)
 {
 	struct sk_buff *skb;

net/nfc/llcp/llcp.c

@@ -45,12 +45,38 @@ void nfc_llcp_sock_unlink(struct llcp_sock_list *l, struct sock *sk)
 	write_unlock(&l->lock);
 }
 
+static void nfc_llcp_socket_purge(struct nfc_llcp_sock *sock)
+{
+	struct nfc_llcp_local *local = sock->local;
+	struct sk_buff *s, *tmp;
+
+	pr_debug("%p\n", &sock->sk);
+
+	skb_queue_purge(&sock->tx_queue);
+	skb_queue_purge(&sock->tx_pending_queue);
+	skb_queue_purge(&sock->tx_backlog_queue);
+
+	if (local == NULL)
+		return;
+
+	/* Search for local pending SKBs that are related to this socket */
+	skb_queue_walk_safe(&local->tx_queue, s, tmp) {
+		if (s->sk != &sock->sk)
+			continue;
+
+		skb_unlink(s, &local->tx_queue);
+		kfree_skb(s);
+	}
+}
+
 static void nfc_llcp_socket_release(struct nfc_llcp_local *local, bool listen)
 {
 	struct sock *sk;
 	struct hlist_node *node, *tmp;
 	struct nfc_llcp_sock *llcp_sock;
 
+	skb_queue_purge(&local->tx_queue);
+
 	write_lock(&local->sockets.lock);
 
 	sk_for_each_safe(sk, node, tmp, &local->sockets.head) {
@@ -58,6 +84,8 @@ static void nfc_llcp_socket_release(struct nfc_llcp_local *local, bool listen)
 
 		bh_lock_sock(sk);
 
+		nfc_llcp_socket_purge(llcp_sock);
+
 		if (sk->sk_state == LLCP_CONNECTED)
 			nfc_put_device(llcp_sock->dev);
 
@@ -65,7 +93,8 @@ static void nfc_llcp_socket_release(struct nfc_llcp_local *local, bool listen)
 			struct nfc_llcp_sock *lsk, *n;
 			struct sock *accept_sk;
 
-			list_for_each_entry_safe(lsk, n, &llcp_sock->accept_queue,
+			list_for_each_entry_safe(lsk, n,
+						 &llcp_sock->accept_queue,
 						 accept_queue) {
 				accept_sk = &lsk->sk;
 				bh_lock_sock(accept_sk);
@@ -85,6 +114,16 @@ static void nfc_llcp_socket_release(struct nfc_llcp_local *local, bool listen)
 			}
 		}
 
+		/*
+		 * If we have a connection less socket bound, we keep it alive
+		 * if the device is still present.
+		 */
+		if (sk->sk_state == LLCP_BOUND && sk->sk_type == SOCK_DGRAM &&
+		    listen == true) {
+			bh_unlock_sock(sk);
+			continue;
+		}
+
 		sk->sk_state = LLCP_CLOSED;
 
 		bh_unlock_sock(sk);
@@ -134,7 +173,7 @@ static struct nfc_llcp_sock *nfc_llcp_sock_get(struct nfc_llcp_local *local,
 {
 	struct sock *sk;
 	struct hlist_node *node;
-	struct nfc_llcp_sock *llcp_sock;
+	struct nfc_llcp_sock *llcp_sock, *tmp_sock;
 
 	pr_debug("ssap dsap %d %d\n", ssap, dsap);
 
@@ -146,11 +185,13 @@ static struct nfc_llcp_sock *nfc_llcp_sock_get(struct nfc_llcp_local *local,
 	llcp_sock = NULL;
 
 	sk_for_each(sk, node, &local->sockets.head) {
-		llcp_sock = nfc_llcp_sock(sk);
+		tmp_sock = nfc_llcp_sock(sk);
 
-		if (llcp_sock->ssap == ssap && llcp_sock->dsap == dsap)
+		if (tmp_sock->ssap == ssap && tmp_sock->dsap == dsap) {
+			llcp_sock = tmp_sock;
 			break;
 		}
+	}
 
 	read_unlock(&local->sockets.lock);
 
@@ -249,7 +290,12 @@ struct nfc_llcp_sock *nfc_llcp_sock_from_sn(struct nfc_llcp_local *local,
 
 		pr_debug("llcp sock %p\n", tmp_sock);
 
-		if (tmp_sock->sk.sk_state != LLCP_LISTEN)
+		if (tmp_sock->sk.sk_type == SOCK_STREAM &&
+		    tmp_sock->sk.sk_state != LLCP_LISTEN)
+			continue;
+
+		if (tmp_sock->sk.sk_type == SOCK_DGRAM &&
+		    tmp_sock->sk.sk_state != LLCP_BOUND)
 			continue;
 
 		if (tmp_sock->service_name == NULL ||
@@ -421,10 +467,9 @@ static u8 nfc_llcp_reserve_sdp_ssap(struct nfc_llcp_local *local)
 static int nfc_llcp_build_gb(struct nfc_llcp_local *local)
 {
 	u8 *gb_cur, *version_tlv, version, version_length;
-	u8 *lto_tlv, lto, lto_length;
+	u8 *lto_tlv, lto_length;
 	u8 *wks_tlv, wks_length;
 	u8 *miux_tlv, miux_length;
-	__be16 miux;
 	u8 gb_len = 0;
 	int ret = 0;
 
@@ -433,9 +478,7 @@ static int nfc_llcp_build_gb(struct nfc_llcp_local *local)
 					 1, &version_length);
 	gb_len += version_length;
 
-	/* 1500 ms */
-	lto = 150;
-	lto_tlv = nfc_llcp_build_tlv(LLCP_TLV_LTO, &lto, 1, &lto_length);
+	lto_tlv = nfc_llcp_build_tlv(LLCP_TLV_LTO, &local->lto, 1, &lto_length);
 	gb_len += lto_length;
 
 	pr_debug("Local wks 0x%lx\n", local->local_wks);
@@ -443,8 +486,7 @@ static int nfc_llcp_build_gb(struct nfc_llcp_local *local)
 				     &wks_length);
 	gb_len += wks_length;
 
-	miux = cpu_to_be16(LLCP_MAX_MIUX);
-	miux_tlv = nfc_llcp_build_tlv(LLCP_TLV_MIUX, (u8 *)&miux, 0,
+	miux_tlv = nfc_llcp_build_tlv(LLCP_TLV_MIUX, (u8 *)&local->miux, 0,
 				      &miux_length);
 	gb_len += miux_length;
 
@@ -610,7 +652,10 @@ static void nfc_llcp_tx_work(struct work_struct *work)
 	if (skb != NULL) {
 		sk = skb->sk;
 		llcp_sock = nfc_llcp_sock(sk);
-		if (llcp_sock != NULL) {
+
+		if (llcp_sock == NULL && nfc_llcp_ptype(skb) == LLCP_PDU_I) {
+			nfc_llcp_send_symm(local->dev);
+		} else {
 			int ret;
 
 			pr_debug("Sending pending skb\n");
@@ -629,8 +674,6 @@ static void nfc_llcp_tx_work(struct work_struct *work)
 				skb_queue_tail(&llcp_sock->tx_pending_queue,
 					       skb);
 			}
-		} else {
-			nfc_llcp_send_symm(local->dev);
 		}
 	} else {
 		nfc_llcp_send_symm(local->dev);
@@ -704,6 +747,39 @@ static u8 *nfc_llcp_connect_sn(struct sk_buff *skb, size_t *sn_len)
 	return NULL;
 }
 
+static void nfc_llcp_recv_ui(struct nfc_llcp_local *local,
+			     struct sk_buff *skb)
+{
+	struct nfc_llcp_sock *llcp_sock;
+	struct nfc_llcp_ui_cb *ui_cb;
+	u8 dsap, ssap;
+
+	dsap = nfc_llcp_dsap(skb);
+	ssap = nfc_llcp_ssap(skb);
+
+	ui_cb = nfc_llcp_ui_skb_cb(skb);
+	ui_cb->dsap = dsap;
+	ui_cb->ssap = ssap;
+
+	printk("%s %d %d\n", __func__, dsap, ssap);
+
+	pr_debug("%d %d\n", dsap, ssap);
+
+	/* We're looking for a bound socket, not a client one */
+	llcp_sock = nfc_llcp_sock_get(local, dsap, LLCP_SAP_SDP);
+	if (llcp_sock == NULL || llcp_sock->sk.sk_type != SOCK_DGRAM)
+		return;
+
+	/* There is no sequence with UI frames */
+	skb_pull(skb, LLCP_HEADER_SIZE);
+	if (sock_queue_rcv_skb(&llcp_sock->sk, skb)) {
+		pr_err("receive queue is full\n");
+		skb_queue_head(&llcp_sock->tx_backlog_queue, skb);
+	}
+
+	nfc_llcp_sock_put(llcp_sock);
+}
+
 static void nfc_llcp_recv_connect(struct nfc_llcp_local *local,
 				  struct sk_buff *skb)
 {
@@ -823,9 +899,6 @@ static void nfc_llcp_recv_connect(struct nfc_llcp_local *local,
 fail:
 	/* Send DM */
 	nfc_llcp_send_dm(local, dsap, ssap, reason);
-
-	return;
-
 }
 
 int nfc_llcp_queue_i_frames(struct nfc_llcp_sock *sock)
@@ -953,6 +1026,9 @@ static void nfc_llcp_recv_disc(struct nfc_llcp_local *local,
 
 	sk = &llcp_sock->sk;
 	lock_sock(sk);
+
+	nfc_llcp_socket_purge(llcp_sock);
+
 	if (sk->sk_state == LLCP_CLOSED) {
 		release_sock(sk);
 		nfc_llcp_sock_put(llcp_sock);
@@ -1027,7 +1103,7 @@ static void nfc_llcp_recv_dm(struct nfc_llcp_local *local, struct sk_buff *skb)
 	}
 
 	if (llcp_sock == NULL) {
-		pr_err("Invalid DM\n");
+		pr_debug("Already closed\n");
 		return;
 	}
 
@@ -1038,8 +1114,100 @@ static void nfc_llcp_recv_dm(struct nfc_llcp_local *local, struct sk_buff *skb)
 	sk->sk_state_change(sk);
 
 	nfc_llcp_sock_put(llcp_sock);
+}
 
+static void nfc_llcp_recv_snl(struct nfc_llcp_local *local,
+			      struct sk_buff *skb)
+{
+	struct nfc_llcp_sock *llcp_sock;
+	u8 dsap, ssap, *tlv, type, length, tid, sap;
+	u16 tlv_len, offset;
+	char *service_name;
+	size_t service_name_len;
+
+	dsap = nfc_llcp_dsap(skb);
+	ssap = nfc_llcp_ssap(skb);
+
+	pr_debug("%d %d\n", dsap, ssap);
+
+	if (dsap != LLCP_SAP_SDP || ssap != LLCP_SAP_SDP) {
+		pr_err("Wrong SNL SAP\n");
 		return;
+	}
+
+	tlv = &skb->data[LLCP_HEADER_SIZE];
+	tlv_len = skb->len - LLCP_HEADER_SIZE;
+	offset = 0;
+
+	while (offset < tlv_len) {
+		type = tlv[0];
+		length = tlv[1];
+
+		switch (type) {
+		case LLCP_TLV_SDREQ:
+			tid = tlv[2];
+			service_name = (char *) &tlv[3];
+			service_name_len = length - 1;
+
+			pr_debug("Looking for %.16s\n", service_name);
+
+			if (service_name_len == strlen("urn:nfc:sn:sdp") &&
+			    !strncmp(service_name, "urn:nfc:sn:sdp",
+				     service_name_len)) {
+				sap = 1;
+				goto send_snl;
+			}
+
+			llcp_sock = nfc_llcp_sock_from_sn(local, service_name,
+							  service_name_len);
+			if (!llcp_sock) {
+				sap = 0;
+				goto send_snl;
+			}
+
+			/*
+			 * We found a socket but its ssap has not been reserved
+			 * yet. We need to assign it for good and send a reply.
+			 * The ssap will be freed when the socket is closed.
+			 */
+			if (llcp_sock->ssap == LLCP_SDP_UNBOUND) {
+				atomic_t *client_count;
+
+				sap = nfc_llcp_reserve_sdp_ssap(local);
+
+				pr_debug("Reserving %d\n", sap);
+
+				if (sap == LLCP_SAP_MAX) {
+					sap = 0;
+					goto send_snl;
+				}
+
+				client_count =
+					&local->local_sdp_cnt[sap -
+							      LLCP_WKS_NUM_SAP];
+
+				atomic_inc(client_count);
+
+				llcp_sock->ssap = sap;
+				llcp_sock->reserved_ssap = sap;
+			} else {
+				sap = llcp_sock->ssap;
+			}
+
+			pr_debug("%p %d\n", llcp_sock, sap);
+
+send_snl:
+			nfc_llcp_send_snl(local, tid, sap);
+			break;
+
+		default:
+			pr_err("Invalid SNL tlv value 0x%x\n", type);
+			break;
+		}
+
+		offset += length + 2;
+		tlv += length + 2;
+	}
 }
 
 static void nfc_llcp_rx_work(struct work_struct *work)
@@ -1072,6 +1240,11 @@ static void nfc_llcp_rx_work(struct work_struct *work)
 		pr_debug("SYMM\n");
 		break;
 
+	case LLCP_PDU_UI:
+		pr_debug("UI\n");
+		nfc_llcp_recv_ui(local, skb);
+		break;
+
 	case LLCP_PDU_CONNECT:
 		pr_debug("CONNECT\n");
 		nfc_llcp_recv_connect(local, skb);
@@ -1092,6 +1265,11 @@ static void nfc_llcp_rx_work(struct work_struct *work)
 		nfc_llcp_recv_dm(local, skb);
 		break;
 
+	case LLCP_PDU_SNL:
+		pr_debug("SNL\n");
+		nfc_llcp_recv_snl(local, skb);
+		break;
+
 	case LLCP_PDU_I:
 	case LLCP_PDU_RR:
 	case LLCP_PDU_RNR:
@@ -1104,8 +1282,6 @@ static void nfc_llcp_rx_work(struct work_struct *work)
 	schedule_work(&local->tx_work);
 	kfree_skb(local->rx_pending);
 	local->rx_pending = NULL;
-
-	return;
 }
 
 void nfc_llcp_recv(void *data, struct sk_buff *skb, int err)
@@ -1121,8 +1297,6 @@ void nfc_llcp_recv(void *data, struct sk_buff *skb, int err)
 	local->rx_pending = skb_get(skb);
 	del_timer(&local->link_timer);
 	schedule_work(&local->rx_work);
-
-	return;
 }
 
 int nfc_llcp_data_received(struct nfc_dev *dev, struct sk_buff *skb)
@@ -1205,6 +1379,10 @@ int nfc_llcp_register_device(struct nfc_dev *ndev)
 	rwlock_init(&local->connecting_sockets.lock);
 	rwlock_init(&local->raw_sockets.lock);
 
+	local->lto = 150; /* 1500 ms */
+	local->rw = LLCP_MAX_RW;
+	local->miux = cpu_to_be16(LLCP_MAX_MIUX);
+
 	nfc_llcp_build_gb(local);
 
 	local->remote_miu = LLCP_DEFAULT_MIU;

net/nfc/llcp/llcp.h

@@ -64,6 +64,9 @@ struct nfc_llcp_local {
 	u32 target_idx;
 	u8 rf_mode;
 	u8 comm_mode;
+	u8 lto;
+	u8 rw;
+	__be16 miux;
 	unsigned long local_wks;      /* Well known services */
 	unsigned long local_sdp;      /* Local services  */
 	unsigned long local_sap; /* Local SAPs, not available for discovery */
@@ -124,6 +127,13 @@ struct nfc_llcp_sock {
 	struct sock *parent;
 };
 
+struct nfc_llcp_ui_cb {
+	__u8 dsap;
+	__u8 ssap;
+};
+
+#define nfc_llcp_ui_skb_cb(__skb) ((struct nfc_llcp_ui_cb *)&((__skb)->cb[0]))
+
 #define nfc_llcp_sock(sk) ((struct nfc_llcp_sock *) (sk))
 #define nfc_llcp_dev(sk)  (nfc_llcp_sock((sk))->dev)
 
@@ -209,10 +219,13 @@ int nfc_llcp_disconnect(struct nfc_llcp_sock *sock);
 int nfc_llcp_send_symm(struct nfc_dev *dev);
 int nfc_llcp_send_connect(struct nfc_llcp_sock *sock);
 int nfc_llcp_send_cc(struct nfc_llcp_sock *sock);
+int nfc_llcp_send_snl(struct nfc_llcp_local *local, u8 tid, u8 sap);
 int nfc_llcp_send_dm(struct nfc_llcp_local *local, u8 ssap, u8 dsap, u8 reason);
 int nfc_llcp_send_disconnect(struct nfc_llcp_sock *sock);
 int nfc_llcp_send_i_frame(struct nfc_llcp_sock *sock,
 			  struct msghdr *msg, size_t len);
+int nfc_llcp_send_ui_frame(struct nfc_llcp_sock *sock, u8 ssap, u8 dsap,
+			   struct msghdr *msg, size_t len);
 int nfc_llcp_send_rr(struct nfc_llcp_sock *sock);
 
 /* Socket API */

net/nfc/llcp/sock.c

@@ -205,8 +205,8 @@ static int llcp_sock_listen(struct socket *sock, int backlog)
 
 	lock_sock(sk);
 
-	if ((sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM)
-	    || sk->sk_state != LLCP_BOUND) {
+	if ((sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM) ||
+	    sk->sk_state != LLCP_BOUND) {
 		ret = -EBADFD;
 		goto error;
 	}
@@ -608,6 +608,25 @@ static int llcp_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
 
 	lock_sock(sk);
 
+	if (sk->sk_type == SOCK_DGRAM) {
+		struct sockaddr_nfc_llcp *addr =
+			(struct sockaddr_nfc_llcp *)msg->msg_name;
+
+		if (msg->msg_namelen < sizeof(*addr)) {
+			release_sock(sk);
+
+			pr_err("Invalid socket address length %d\n",
+			       msg->msg_namelen);
+
+			return -EINVAL;
+		}
+
+		release_sock(sk);
+
+		return nfc_llcp_send_ui_frame(llcp_sock, addr->dsap, addr->ssap,
+					      msg, len);
+	}
+
 	if (sk->sk_state != LLCP_CONNECTED) {
 		release_sock(sk);
 		return -ENOTCONN;
@@ -663,11 +682,28 @@ static int llcp_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
 		return -EFAULT;
 	}
 
+	if (sk->sk_type == SOCK_DGRAM && msg->msg_name) {
+		struct nfc_llcp_ui_cb *ui_cb = nfc_llcp_ui_skb_cb(skb);
+		struct sockaddr_nfc_llcp sockaddr;
+
+		pr_debug("Datagram socket %d %d\n", ui_cb->dsap, ui_cb->ssap);
+
+		sockaddr.sa_family = AF_NFC;
+		sockaddr.nfc_protocol = NFC_PROTO_NFC_DEP;
+		sockaddr.dsap = ui_cb->dsap;
+		sockaddr.ssap = ui_cb->ssap;
+
+		memcpy(msg->msg_name, &sockaddr, sizeof(sockaddr));
+		msg->msg_namelen = sizeof(sockaddr);
+	}
+
 	/* Mark read part of skb as used */
 	if (!(flags & MSG_PEEK)) {
 
 		/* SOCK_STREAM: re-queue skb if it contains unreceived data */
-		if (sk->sk_type == SOCK_STREAM || sk->sk_type == SOCK_RAW) {
+		if (sk->sk_type == SOCK_STREAM ||
+		    sk->sk_type == SOCK_DGRAM ||
+		    sk->sk_type == SOCK_RAW) {
 			skb_pull(skb, copied);
 			if (skb->len) {
 				skb_queue_head(&sk->sk_receive_queue, skb);

net/nfc/nci/Kconfig

 config NFC_NCI
-	depends on NFC && EXPERIMENTAL
-	tristate "NCI protocol support (EXPERIMENTAL)"
+	depends on NFC
+	tristate "NCI protocol support"
 	default n
 	help
 	  NCI (NFC Controller Interface) is a communication protocol between

net/nfc/nci/core.c

@@ -205,10 +205,10 @@ static void nci_rf_discover_req(struct nci_dev *ndev, unsigned long opt)
 	cmd.num_disc_configs = 0;
 
 	if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) &&
-	    (protocols & NFC_PROTO_JEWEL_MASK
-	     || protocols & NFC_PROTO_MIFARE_MASK
-	     || protocols & NFC_PROTO_ISO14443_MASK
-	     || protocols & NFC_PROTO_NFC_DEP_MASK)) {
+	    (protocols & NFC_PROTO_JEWEL_MASK ||
+	     protocols & NFC_PROTO_MIFARE_MASK ||
+	     protocols & NFC_PROTO_ISO14443_MASK ||
+	     protocols & NFC_PROTO_NFC_DEP_MASK)) {
 		cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
 			NCI_NFC_A_PASSIVE_POLL_MODE;
 		cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
@@ -224,8 +224,8 @@ static void nci_rf_discover_req(struct nci_dev *ndev, unsigned long opt)
 	}
 
 	if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) &&
-	    (protocols & NFC_PROTO_FELICA_MASK
-	     || protocols & NFC_PROTO_NFC_DEP_MASK)) {
+	    (protocols & NFC_PROTO_FELICA_MASK ||
+	     protocols & NFC_PROTO_NFC_DEP_MASK)) {
 		cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
 			NCI_NFC_F_PASSIVE_POLL_MODE;
 		cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
@@ -414,13 +414,13 @@ static int nci_set_local_general_bytes(struct nfc_dev *nfc_dev)
 	struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
 	struct nci_set_config_param param;
 	__u8 local_gb[NFC_MAX_GT_LEN];
-	int i, rc = 0;
+	int i;
 
 	param.val = nfc_get_local_general_bytes(nfc_dev, &param.len);
 	if ((param.val == NULL) || (param.len == 0))
-		return rc;
+		return 0;
 
-	if (param.len > NCI_MAX_PARAM_LEN)
+	if (param.len > NFC_MAX_GT_LEN)
 		return -EINVAL;
 
 	for (i = 0; i < param.len; i++)
@@ -429,10 +429,8 @@ static int nci_set_local_general_bytes(struct nfc_dev *nfc_dev)
 	param.id = NCI_PN_ATR_REQ_GEN_BYTES;
 	param.val = local_gb;
 
-	rc = nci_request(ndev, nci_set_config_req, (unsigned long)&param,
+	return nci_request(ndev, nci_set_config_req, (unsigned long)&param,
 			   msecs_to_jiffies(NCI_SET_CONFIG_TIMEOUT));
-
-	return rc;
 }
 
 static int nci_start_poll(struct nfc_dev *nfc_dev,
@@ -579,7 +577,6 @@ static void nci_deactivate_target(struct nfc_dev *nfc_dev,
 	}
 }
 
-
 static int nci_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
 			   __u8 comm_mode, __u8 *gb, size_t gb_len)
 {
@@ -806,8 +803,8 @@ int nci_recv_frame(struct sk_buff *skb)
 
 	pr_debug("len %d\n", skb->len);
 
-	if (!ndev || (!test_bit(NCI_UP, &ndev->flags)
-		      && !test_bit(NCI_INIT, &ndev->flags))) {
+	if (!ndev || (!test_bit(NCI_UP, &ndev->flags) &&
+	    !test_bit(NCI_INIT, &ndev->flags))) {
 		kfree_skb(skb);
 		return -ENXIO;
 	}

net/nfc/netlink.c

@@ -29,6 +29,8 @@
 
 #include "nfc.h"
 
+#include "llcp/llcp.h"
+
 static struct genl_multicast_group nfc_genl_event_mcgrp = {
 	.name = NFC_GENL_MCAST_EVENT_NAME,
 };
@@ -364,7 +366,8 @@ static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev,
 	if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
 	    nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
 	    nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
-	    nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up))
+	    nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up) ||
+	    nla_put_u8(msg, NFC_ATTR_RF_MODE, dev->rf_mode))
 		goto nla_put_failure;
 
 	return genlmsg_end(msg, hdr);
@@ -715,6 +718,146 @@ static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info)
 	return rc;
 }
 
+static int nfc_genl_send_params(struct sk_buff *msg,
+				struct nfc_llcp_local *local,
+				u32 portid, u32 seq)
+{
+	void *hdr;
+
+	hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, 0,
+			  NFC_CMD_LLC_GET_PARAMS);
+	if (!hdr)
+		return -EMSGSIZE;
+
+	if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, local->dev->idx) ||
+	    nla_put_u8(msg, NFC_ATTR_LLC_PARAM_LTO, local->lto) ||
+	    nla_put_u8(msg, NFC_ATTR_LLC_PARAM_RW, local->rw) ||
+	    nla_put_u16(msg, NFC_ATTR_LLC_PARAM_MIUX, be16_to_cpu(local->miux)))
+		goto nla_put_failure;
+
+	return genlmsg_end(msg, hdr);
+
+nla_put_failure:
+
+	genlmsg_cancel(msg, hdr);
+	return -EMSGSIZE;
+}
+
+static int nfc_genl_llc_get_params(struct sk_buff *skb, struct genl_info *info)
+{
+	struct nfc_dev *dev;
+	struct nfc_llcp_local *local;
+	int rc = 0;
+	struct sk_buff *msg = NULL;
+	u32 idx;
+
+	if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
+		return -EINVAL;
+
+	idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
+
+	dev = nfc_get_device(idx);
+	if (!dev)
+		return -ENODEV;
+
+	device_lock(&dev->dev);
+
+	local = nfc_llcp_find_local(dev);
+	if (!local) {
+		rc = -ENODEV;
+		goto exit;
+	}
+
+	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+	if (!msg) {
+		rc = -ENOMEM;
+		goto exit;
+	}
+
+	rc = nfc_genl_send_params(msg, local, info->snd_portid, info->snd_seq);
+
+exit:
+	device_unlock(&dev->dev);
+
+	nfc_put_device(dev);
+
+	if (rc < 0) {
+		if (msg)
+			nlmsg_free(msg);
+
+		return rc;
+	}
+
+	return genlmsg_reply(msg, info);
+}
+
+static int nfc_genl_llc_set_params(struct sk_buff *skb, struct genl_info *info)
+{
+	struct nfc_dev *dev;
+	struct nfc_llcp_local *local;
+	u8 rw = 0;
+	u16 miux = 0;
+	u32 idx;
+	int rc = 0;
+
+	if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
+	    (!info->attrs[NFC_ATTR_LLC_PARAM_LTO] &&
+	     !info->attrs[NFC_ATTR_LLC_PARAM_RW] &&
+	     !info->attrs[NFC_ATTR_LLC_PARAM_MIUX]))
+		return -EINVAL;
+
+	if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) {
+		rw = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_RW]);
+
+		if (rw > LLCP_MAX_RW)
+			return -EINVAL;
+	}
+
+	if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) {
+		miux = nla_get_u16(info->attrs[NFC_ATTR_LLC_PARAM_MIUX]);
+
+		if (miux > LLCP_MAX_MIUX)
+			return -EINVAL;
+	}
+
+	idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
+
+	dev = nfc_get_device(idx);
+	if (!dev)
+		return -ENODEV;
+
+	device_lock(&dev->dev);
+
+	local = nfc_llcp_find_local(dev);
+	if (!local) {
+		nfc_put_device(dev);
+		rc = -ENODEV;
+		goto exit;
+	}
+
+	if (info->attrs[NFC_ATTR_LLC_PARAM_LTO]) {
+		if (dev->dep_link_up) {
+			rc = -EINPROGRESS;
+			goto exit;
+		}
+
+		local->lto = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_LTO]);
+	}
+
+	if (info->attrs[NFC_ATTR_LLC_PARAM_RW])
+		local->rw = rw;
+
+	if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX])
+		local->miux = cpu_to_be16(miux);
+
+exit:
+	device_unlock(&dev->dev);
+
+	nfc_put_device(dev);
+
+	return rc;
+}
+
 static struct genl_ops nfc_genl_ops[] = {
 	{
 		.cmd = NFC_CMD_GET_DEVICE,
@@ -759,6 +902,16 @@ static struct genl_ops nfc_genl_ops[] = {
 		.done = nfc_genl_dump_targets_done,
 		.policy = nfc_genl_policy,
 	},
+	{
+		.cmd = NFC_CMD_LLC_GET_PARAMS,
+		.doit = nfc_genl_llc_get_params,
+		.policy = nfc_genl_policy,
+	},
+	{
+		.cmd = NFC_CMD_LLC_SET_PARAMS,
+		.doit = nfc_genl_llc_set_params,
+		.policy = nfc_genl_policy,
+	},
 };
 
 

net/nfc/nfc.h

@@ -56,6 +56,7 @@ void nfc_llcp_unregister_device(struct nfc_dev *dev);
 int nfc_llcp_set_remote_gb(struct nfc_dev *dev, u8 *gb, u8 gb_len);
 u8 *nfc_llcp_general_bytes(struct nfc_dev *dev, size_t *general_bytes_len);
 int nfc_llcp_data_received(struct nfc_dev *dev, struct sk_buff *skb);
+struct nfc_llcp_local *nfc_llcp_find_local(struct nfc_dev *dev);
 int __init nfc_llcp_init(void);
 void nfc_llcp_exit(void);
 
@@ -97,6 +98,11 @@ static inline int nfc_llcp_data_received(struct nfc_dev *dev,
 	return 0;
 }
 
+static inline struct nfc_llcp_local *nfc_llcp_find_local(struct nfc_dev *dev)
+{
+	return NULL;
+}
+
 static inline int nfc_llcp_init(void)
 {
 	return 0;

net/nfc/rawsock.c

@@ -256,7 +256,6 @@ static int rawsock_recvmsg(struct kiocb *iocb, struct socket *sock,
 	return rc ? : copied;
 }
 
-
 static const struct proto_ops rawsock_ops = {
 	.family         = PF_NFC,
 	.owner          = THIS_MODULE,