NFC: pn544: Add MEI physical layer (bb03dceb) · Commits · e / devices / android_kernel_fairphone_FP4

drivers/nfc/pn544/Kconfig

+12 −1

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		@@ -21,3 +21,14 @@ config NFC_PN544_I2C

		If you choose to build a module, it'll be called pn544_i2c.
		Say N if unsure.

		config NFC_PN544_MEI
		tristate "NFC PN544 MEI support"
		depends on NFC_PN544 && NFC_MEI_PHY
		---help---
		This module adds support for the mei interface of adapters using
		NXP pn544 chipsets. Select this if your pn544 chipset
		is handled by Intel's Management Engine Interface on your platform.

		If you choose to build a module, it'll be called pn544_mei.
		Say N if unsure.

drivers/nfc/pn544/Makefile

+2 −0

Original line number	Diff line number	Diff line
		@@ -3,6 +3,8 @@
		#

		pn544_i2c-objs = i2c.o
		pn544_mei-objs = mei.o

		obj-$(CONFIG_NFC_PN544) += pn544.o
		obj-$(CONFIG_NFC_PN544_I2C) += pn544_i2c.o
		obj-$(CONFIG_NFC_PN544_MEI) += pn544_mei.o

drivers/nfc/pn544/mei.c

0 → 100644

+121 −0

Original line number	Diff line number	Diff line
		/*
		* HCI based Driver for NXP pn544 NFC Chip
		*
		* Copyright (C) 2013 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/module.h>
		#include <linux/mod_devicetable.h>
		#include <linux/nfc.h>
		#include <net/nfc/hci.h>
		#include <net/nfc/llc.h>

		#include "../mei_phy.h"
		#include "pn544.h"

		#define PN544_DRIVER_NAME "pn544"

		static int pn544_mei_probe(struct mei_cl_device *device,
		const struct mei_cl_device_id *id)
		{
		struct nfc_mei_phy *phy;
		int r;

		pr_info("Probing NFC pn544\n");

		phy = nfc_mei_phy_alloc(device);
		if (!phy) {
		pr_err("Cannot allocate memory for pn544 mei phy.\n");
		return -ENOMEM;
		}

		r = mei_cl_register_event_cb(device, nfc_mei_event_cb, phy);
		if (r) {
		pr_err(PN544_DRIVER_NAME ": event cb registration failed\n");
		goto err_out;
		}

		r = pn544_hci_probe(phy, &mei_phy_ops, LLC_NOP_NAME,
		MEI_NFC_HEADER_SIZE, 0, MEI_NFC_MAX_HCI_PAYLOAD,
		&phy->hdev);
		if (r < 0)
		goto err_out;

		return 0;

		err_out:
		nfc_mei_phy_free(phy);

		return r;
		}

		static int pn544_mei_remove(struct mei_cl_device *device)
		{
		struct nfc_mei_phy *phy = mei_cl_get_drvdata(device);

		pr_info("Removing pn544\n");

		pn544_hci_remove(phy->hdev);

		nfc_mei_phy_disable(phy);

		nfc_mei_phy_free(phy);

		return 0;
		}

		static struct mei_cl_device_id pn544_mei_tbl[] = {
		{ PN544_DRIVER_NAME },

		/* required last entry */
		{ }
		};
		MODULE_DEVICE_TABLE(mei, pn544_mei_tbl);

		static struct mei_cl_driver pn544_driver = {
		.id_table = pn544_mei_tbl,
		.name = PN544_DRIVER_NAME,

		.probe = pn544_mei_probe,
		.remove = pn544_mei_remove,
		};

		static int pn544_mei_init(void)
		{
		int r;

		pr_debug(DRIVER_DESC ": %s\n", __func__);

		r = mei_cl_driver_register(&pn544_driver);
		if (r) {
		pr_err(PN544_DRIVER_NAME ": driver registration failed\n");
		return r;
		}

		return 0;
		}

		static void pn544_mei_exit(void)
		{
		mei_cl_driver_unregister(&pn544_driver);
		}

		module_init(pn544_mei_init);
		module_exit(pn544_mei_exit);

		MODULE_LICENSE("GPL");
		MODULE_DESCRIPTION(DRIVER_DESC);