1 /* 2 * HCI based Driver for Inside Secure microread 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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 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 "microread.h" 29 30 #define MICROREAD_DRIVER_NAME "microread" 31 32 static int microread_mei_probe(struct mei_cl_device *cldev, 33 const struct mei_cl_device_id *id) 34 { 35 struct nfc_mei_phy *phy; 36 int r; 37 38 pr_info("Probing NFC microread\n"); 39 40 phy = nfc_mei_phy_alloc(cldev); 41 if (!phy) { 42 pr_err("Cannot allocate memory for microread mei phy.\n"); 43 return -ENOMEM; 44 } 45 46 r = microread_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 microread_mei_remove(struct mei_cl_device *cldev) 59 { 60 struct nfc_mei_phy *phy = mei_cldev_get_drvdata(cldev); 61 62 microread_remove(phy->hdev); 63 64 nfc_mei_phy_free(phy); 65 66 return 0; 67 } 68 69 static struct mei_cl_device_id microread_mei_tbl[] = { 70 { MICROREAD_DRIVER_NAME, MEI_NFC_UUID, MEI_CL_VERSION_ANY}, 71 72 /* required last entry */ 73 { } 74 }; 75 MODULE_DEVICE_TABLE(mei, microread_mei_tbl); 76 77 static struct mei_cl_driver microread_driver = { 78 .id_table = microread_mei_tbl, 79 .name = MICROREAD_DRIVER_NAME, 80 81 .probe = microread_mei_probe, 82 .remove = microread_mei_remove, 83 }; 84 85 module_mei_cl_driver(microread_driver); 86 87 MODULE_LICENSE("GPL"); 88 MODULE_DESCRIPTION(DRIVER_DESC); 89