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Commit 3e256b8f authored by Lauro Ramos Venancio's avatar Lauro Ramos Venancio Committed by John W. Linville
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NFC: add nfc subsystem core 



The NFC subsystem core is responsible for providing the device driver
interface. It is also responsible for providing an interface to the control
operations and data exchange.

Signed-off-by: default avatarLauro Ramos Venancio <lauro.venancio@openbossa.org>
Signed-off-by: default avatarAloisio Almeida Jr <aloisio.almeida@openbossa.org>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 2b4562df

drivers/Kconfig

+0 −2
Original line number Diff line number Diff line
@@ -92,8 +92,6 @@ source "drivers/memstick/Kconfig" 


source "drivers/leds/Kconfig"



source "drivers/nfc/Kconfig"



source "drivers/accessibility/Kconfig"



source "drivers/infiniband/Kconfig"

drivers/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -120,3 +120,4 @@ obj-y += ieee802154/ 
obj-y				+= clk/



obj-$(CONFIG_HWSPINLOCK)	+= hwspinlock/

obj-$(CONFIG_NFC)		+= nfc/

drivers/nfc/Kconfig

+3 −13
Original line number Diff line number Diff line
@@ -2,17 +2,8 @@ 
# Near Field Communication (NFC) devices

#



menuconfig NFC_DEVICES

	bool "Near Field Communication (NFC) devices"

	default n

	---help---

	  You'll have to say Y if your computer contains an NFC device that

	  you want to use under Linux.



	  You can say N here if you don't have any Near Field Communication

	  devices connected to your computer.



if NFC_DEVICES

menu "Near Field Communication (NFC) devices"

	depends on NFC



config PN544_NFC

	tristate "PN544 NFC driver"
@@ -26,5 +17,4 @@ config PN544_NFC 
	  To compile this driver as a module, choose m here. The module will

	  be called pn544.





endif # NFC_DEVICES
 
endmenu

drivers/nfc/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -3,3 +3,5 @@ 
#



obj-$(CONFIG_PN544_NFC)		+= pn544.o



ccflags-$(CONFIG_NFC_DEBUG) := -DDEBUG

include/net/nfc.h

0 → 100644
+135 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2011 Instituto Nokia de Tecnologia

 *

 * Authors:

 *    Lauro Ramos Venancio <lauro.venancio@openbossa.org>

 *    Aloisio Almeida Jr <aloisio.almeida@openbossa.org>

 *

 * 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 __NET_NFC_H

#define __NET_NFC_H



#include <linux/device.h>

#include <linux/skbuff.h>



#define nfc_dev_info(dev, fmt, arg...) dev_info((dev), "NFC: " fmt "\n", ## arg)

#define nfc_dev_err(dev, fmt, arg...) dev_err((dev), "NFC: " fmt "\n", ## arg)

#define nfc_dev_dbg(dev, fmt, arg...) dev_dbg((dev), fmt "\n", ## arg)



struct nfc_dev;



/**

 * data_exchange_cb_t - Definition of nfc_data_exchange callback

 *

 * @context: nfc_data_exchange cb_context parameter

 * @skb: response data

 * @err: If an error has occurred during data exchange, it is the

 *	error number. Zero means no error.

 *

 * When a rx or tx package is lost or corrupted or the target gets out

 * of the operating field, err is -EIO.

 */

typedef void (*data_exchange_cb_t)(void *context, struct sk_buff *skb,

								int err);



struct nfc_ops {

	int (*start_poll)(struct nfc_dev *dev, u32 protocols);

	void (*stop_poll)(struct nfc_dev *dev);

	int (*activate_target)(struct nfc_dev *dev, u32 target_idx,

							u32 protocol);

	void (*deactivate_target)(struct nfc_dev *dev, u32 target_idx);

	int (*data_exchange)(struct nfc_dev *dev, u32 target_idx,

				struct sk_buff *skb, data_exchange_cb_t cb,

							void *cb_context);

};



struct nfc_dev {

	unsigned idx;

	struct device dev;

	bool polling;

	u32 supported_protocols;



	struct nfc_ops *ops;

};

#define to_nfc_dev(_dev) container_of(_dev, struct nfc_dev, dev)



extern struct class nfc_class;



struct nfc_dev *nfc_allocate_device(struct nfc_ops *ops,

					u32 supported_protocols);



/**

 * nfc_free_device - free nfc device

 *

 * @dev: The nfc device to free

 */

static inline void nfc_free_device(struct nfc_dev *dev)

{

	put_device(&dev->dev);

}



int nfc_register_device(struct nfc_dev *dev);



void nfc_unregister_device(struct nfc_dev *dev);



/**

 * nfc_set_parent_dev - set the parent device

 *

 * @nfc_dev: The nfc device whose parent is being set

 * @dev: The parent device

 */

static inline void nfc_set_parent_dev(struct nfc_dev *nfc_dev,

					struct device *dev)

{

	nfc_dev->dev.parent = dev;

}



/**

 * nfc_set_drvdata - set driver specifc data

 *

 * @dev: The nfc device

 * @data: Pointer to driver specifc data

 */

static inline void nfc_set_drvdata(struct nfc_dev *dev, void *data)

{

	dev_set_drvdata(&dev->dev, data);

}



/**

 * nfc_get_drvdata - get driver specifc data

 *

 * @dev: The nfc device

 */

static inline void *nfc_get_drvdata(struct nfc_dev *dev)

{

	return dev_get_drvdata(&dev->dev);

}



/**

 * nfc_device_name - get the nfc device name

 *

 * @dev: The nfc device whose name to return

 */

static inline const char *nfc_device_name(struct nfc_dev *dev)

{

	return dev_name(&dev->dev);

}



struct sk_buff *nfc_alloc_skb(unsigned int size, gfp_t gfp);



#endif /* __NET_NFC_H */