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, see <http://www.gnu.org/licenses/>. 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 30 static int pn544_mei_probe(struct mei_cl_device *cldev, 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 38 phy = nfc_mei_phy_alloc(cldev); 39 if (!phy) { 40 pr_err("Cannot allocate memory for pn544 mei phy.\n"); 41 return -ENOMEM; 42 } 43 44 r = pn544_hci_probe(phy, &mei_phy_ops, LLC_NOP_NAME, 45 MEI_NFC_HEADER_SIZE, 0, MEI_NFC_MAX_HCI_PAYLOAD, 46 NULL, &phy->hdev); 47 if (r < 0) { 48 nfc_mei_phy_free(phy); 49 50 return r; 51 } 52 53 return 0; 54 } 55 56 static int pn544_mei_remove(struct mei_cl_device *cldev) 57 { 58 struct nfc_mei_phy *phy = mei_cldev_get_drvdata(cldev); 59 60 pr_info("Removing pn544\n"); 61 62 pn544_hci_remove(phy->hdev); 63 64 nfc_mei_phy_free(phy); 65 66 return 0; 67 } 68 69 static struct mei_cl_device_id pn544_mei_tbl[] = { 70 { PN544_DRIVER_NAME, MEI_NFC_UUID, MEI_CL_VERSION_ANY}, 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 91 r = mei_cldev_driver_register(&pn544_driver); 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 { 102 mei_cldev_driver_unregister(&pn544_driver); 103 } 104 105 module_init(pn544_mei_init); 106 module_exit(pn544_mei_exit); 107 108 MODULE_LICENSE("GPL"); 109 MODULE_DESCRIPTION(DRIVER_DESC); 110