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 16 * along with this program; if not, write to the 17 * Free Software Foundation, Inc., 18 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 19 */ 20 21 #include <linux/module.h> 22 #include <linux/mod_devicetable.h> 23 #include <linux/nfc.h> 24 #include <net/nfc/hci.h> 25 #include <net/nfc/llc.h> 26 27 #include "../mei_phy.h" 28 #include "pn544.h" 29 30 #define PN544_DRIVER_NAME "pn544" 31 32 static int pn544_mei_probe(struct mei_cl_device *device, 33 const struct mei_cl_device_id *id) 34 { 35 struct nfc_mei_phy *phy; 36 int r; 37 38 pr_info("Probing NFC pn544\n"); 39 40 phy = nfc_mei_phy_alloc(device); 41 if (!phy) { 42 pr_err("Cannot allocate memory for pn544 mei phy.\n"); 43 return -ENOMEM; 44 } 45 46 r = pn544_hci_probe(phy, &mei_phy_ops, LLC_NOP_NAME, 47 MEI_NFC_HEADER_SIZE, 0, MEI_NFC_MAX_HCI_PAYLOAD, 48 &phy->hdev); 49 if (r < 0) { 50 nfc_mei_phy_free(phy); 51 52 return r; 53 } 54 55 return 0; 56 } 57 58 static int pn544_mei_remove(struct mei_cl_device *device) 59 { 60 struct nfc_mei_phy *phy = mei_cl_get_drvdata(device); 61 62 pr_info("Removing pn544\n"); 63 64 pn544_hci_remove(phy->hdev); 65 66 nfc_mei_phy_disable(phy); 67 68 nfc_mei_phy_free(phy); 69 70 return 0; 71 } 72 73 static struct mei_cl_device_id pn544_mei_tbl[] = { 74 { PN544_DRIVER_NAME }, 75 76 /* required last entry */ 77 { } 78 }; 79 MODULE_DEVICE_TABLE(mei, pn544_mei_tbl); 80 81 static struct mei_cl_driver pn544_driver = { 82 .id_table = pn544_mei_tbl, 83 .name = PN544_DRIVER_NAME, 84 85 .probe = pn544_mei_probe, 86 .remove = pn544_mei_remove, 87 }; 88 89 static int pn544_mei_init(void) 90 { 91 int r; 92 93 pr_debug(DRIVER_DESC ": %s\n", __func__); 94 95 r = mei_cl_driver_register(&pn544_driver); 96 if (r) { 97 pr_err(PN544_DRIVER_NAME ": driver registration failed\n"); 98 return r; 99 } 100 101 return 0; 102 } 103 104 static void pn544_mei_exit(void) 105 { 106 mei_cl_driver_unregister(&pn544_driver); 107 } 108 109 module_init(pn544_mei_init); 110 module_exit(pn544_mei_exit); 111 112 MODULE_LICENSE("GPL"); 113 MODULE_DESCRIPTION(DRIVER_DESC); 114