[deliverable/linux.git] / drivers / nfc / pn544 / mei.c

/*
 * 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, see <http://www.gnu.org/licenses/>.
 */

#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 *cldev,
			       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(cldev);
	if (!phy) {
		pr_err("Cannot allocate memory for pn544 mei phy.\n");
		return -ENOMEM;
	}

	r = pn544_hci_probe(phy, &mei_phy_ops, LLC_NOP_NAME,
			    MEI_NFC_HEADER_SIZE, 0, MEI_NFC_MAX_HCI_PAYLOAD,
			    NULL, &phy->hdev);
	if (r < 0) {
		nfc_mei_phy_free(phy);

		return r;
	}

	return 0;
}

static int pn544_mei_remove(struct mei_cl_device *cldev)
{
	struct nfc_mei_phy *phy = mei_cldev_get_drvdata(cldev);

	pr_info("Removing pn544\n");

	pn544_hci_remove(phy->hdev);

	nfc_mei_phy_free(phy);

	return 0;
}

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

	/* 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_cldev_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_cldev_driver_unregister(&pn544_driver);
}

module_init(pn544_mei_init);
module_exit(pn544_mei_exit);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION(DRIVER_DESC);
Commit	Line	Data
bb03dceb SO	1	/*
	2	* HCI based Driver for NXP pn544 NFC Chip
	3	*
	4	* Copyright (C) 2013 Intel Corporation. All rights reserved.
	5	*
	6	* This program is free software; you can redistribute it and/or modify it
	7	* under the terms and conditions of the GNU General Public License,
	8	* version 2, as published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License
98b32dec	16	* along with this program; if not, see <http://www.gnu.org/licenses/>.
bb03dceb SO	17	*/
	18
	19	#include <linux/module.h>
	20	#include <linux/mod_devicetable.h>
	21	#include <linux/nfc.h>
	22	#include <net/nfc/hci.h>
	23	#include <net/nfc/llc.h>
	24
	25	#include "../mei_phy.h"
	26	#include "pn544.h"
	27
	28	#define PN544_DRIVER_NAME "pn544"
	29
89391382	30	static int pn544_mei_probe(struct mei_cl_device *cldev,
bb03dceb SO	31	const struct mei_cl_device_id *id)
	32	{
	33	struct nfc_mei_phy *phy;
	34	int r;
	35
	36	pr_info("Probing NFC pn544\n");
	37
89391382	38	phy = nfc_mei_phy_alloc(cldev);
bb03dceb SO	39	if (!phy) {
	40	pr_err("Cannot allocate memory for pn544 mei phy.\n");
	41	return -ENOMEM;
	42	}
	43
bb03dceb SO	44	r = pn544_hci_probe(phy, &mei_phy_ops, LLC_NOP_NAME,
bb03dceb SO	45	MEI_NFC_HEADER_SIZE, 0, MEI_NFC_MAX_HCI_PAYLOAD,
8bd7fc89	46	NULL, &phy->hdev);
73f3adb9 SO	47	if (r < 0) {
73f3adb9 SO	48	nfc_mei_phy_free(phy);
bb03dceb	49
73f3adb9 SO	50	return r;
73f3adb9 SO	51	}
bb03dceb	52
73f3adb9	53	return 0;
bb03dceb SO	54	}
bb03dceb SO	55
89391382	56	static int pn544_mei_remove(struct mei_cl_device *cldev)
bb03dceb	57	{
d49dc5e7	58	struct nfc_mei_phy *phy = mei_cldev_get_drvdata(cldev);
bb03dceb SO	59
	60	pr_info("Removing pn544\n");
	61
	62	pn544_hci_remove(phy->hdev);
	63
bb03dceb SO	64	nfc_mei_phy_free(phy);
	65
	66	return 0;
	67	}
	68
	69	static struct mei_cl_device_id pn544_mei_tbl[] = {
b26864ca	70	{ PN544_DRIVER_NAME, MEI_NFC_UUID, MEI_CL_VERSION_ANY},
bb03dceb SO	71
	72	/* required last entry */
	73	{ }
	74	};
	75	MODULE_DEVICE_TABLE(mei, pn544_mei_tbl);
	76
	77	static struct mei_cl_driver pn544_driver = {
	78	.id_table = pn544_mei_tbl,
	79	.name = PN544_DRIVER_NAME,
	80
	81	.probe = pn544_mei_probe,
	82	.remove = pn544_mei_remove,
	83	};
	84
	85	static int pn544_mei_init(void)
	86	{
	87	int r;
	88
	89	pr_debug(DRIVER_DESC ": %s\n", __func__);
	90
d49dc5e7	91	r = mei_cldev_driver_register(&pn544_driver);
bb03dceb SO	92	if (r) {
	93	pr_err(PN544_DRIVER_NAME ": driver registration failed\n");
	94	return r;
	95	}
	96
	97	return 0;
	98	}
	99
	100	static void pn544_mei_exit(void)
	101	{
d49dc5e7	102	mei_cldev_driver_unregister(&pn544_driver);
bb03dceb SO	103	}
	104
	105	module_init(pn544_mei_init);
	106	module_exit(pn544_mei_exit);
	107
	108	MODULE_LICENSE("GPL");
	109	MODULE_DESCRIPTION(DRIVER_DESC);