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 = mei_cl_register_event_cb(device, nfc_mei_event_cb, phy); 47 if (r) { 48 pr_err(PN544_DRIVER_NAME ": event cb registration failed\n"); 49 goto err_out; 50 } 51 52 r = pn544_hci_probe(phy, &mei_phy_ops, LLC_NOP_NAME, 53 MEI_NFC_HEADER_SIZE, 0, MEI_NFC_MAX_HCI_PAYLOAD, 54 &phy->hdev); 55 if (r < 0) 56 goto err_out; 57 58 return 0; 59 60 err_out: 61 nfc_mei_phy_free(phy); 62 63 return r; 64 } 65 66 static int pn544_mei_remove(struct mei_cl_device *device) 67 { 68 struct nfc_mei_phy *phy = mei_cl_get_drvdata(device); 69 70 pr_info("Removing pn544\n"); 71 72 pn544_hci_remove(phy->hdev); 73 74 nfc_mei_phy_disable(phy); 75 76 nfc_mei_phy_free(phy); 77 78 return 0; 79 } 80 81 static struct mei_cl_device_id pn544_mei_tbl[] = { 82 { PN544_DRIVER_NAME }, 83 84 /* required last entry */ 85 { } 86 }; 87 MODULE_DEVICE_TABLE(mei, pn544_mei_tbl); 88 89 static struct mei_cl_driver pn544_driver = { 90 .id_table = pn544_mei_tbl, 91 .name = PN544_DRIVER_NAME, 92 93 .probe = pn544_mei_probe, 94 .remove = pn544_mei_remove, 95 }; 96 97 static int pn544_mei_init(void) 98 { 99 int r; 100 101 pr_debug(DRIVER_DESC ": %s\n", __func__); 102 103 r = mei_cl_driver_register(&pn544_driver); 104 if (r) { 105 pr_err(PN544_DRIVER_NAME ": driver registration failed\n"); 106 return r; 107 } 108 109 return 0; 110 } 111 112 static void pn544_mei_exit(void) 113 { 114 mei_cl_driver_unregister(&pn544_driver); 115 } 116 117 module_init(pn544_mei_init); 118 module_exit(pn544_mei_exit); 119 120 MODULE_LICENSE("GPL"); 121 MODULE_DESCRIPTION(DRIVER_DESC); 122