mei.c
2.34 KB
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/*
* 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 *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 = 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 *device)
{
struct nfc_mei_phy *phy = mei_cl_get_drvdata(device);
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 },
/* 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);