1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 2013 Intel Corporation. All rights reserved. 4 * 5 * HCI based Driver for Inside Secure microread NFC Chip 6 */ 7 8 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 9 10 #include <linux/module.h> 11 #include <linux/mod_devicetable.h> 12 #include <linux/nfc.h> 13 #include <net/nfc/llc.h> 14 15 #include "../mei_phy.h" 16 #include "microread.h" 17 18 #define MICROREAD_DRIVER_NAME "microread" 19 20 static int microread_mei_probe(struct mei_cl_device *cldev, 21 const struct mei_cl_device_id *id) 22 { 23 struct nfc_mei_phy *phy; 24 int r; 25 26 pr_info("Probing NFC microread\n"); 27 28 phy = nfc_mei_phy_alloc(cldev); 29 if (!phy) { 30 pr_err("Cannot allocate memory for microread mei phy.\n"); 31 return -ENOMEM; 32 } 33 34 r = microread_probe(phy, &mei_phy_ops, LLC_NOP_NAME, 35 MEI_NFC_HEADER_SIZE, 0, MEI_NFC_MAX_HCI_PAYLOAD, 36 &phy->hdev); 37 if (r < 0) { 38 nfc_mei_phy_free(phy); 39 40 return r; 41 } 42 43 return 0; 44 } 45 46 static void microread_mei_remove(struct mei_cl_device *cldev) 47 { 48 struct nfc_mei_phy *phy = mei_cldev_get_drvdata(cldev); 49 50 microread_remove(phy->hdev); 51 52 nfc_mei_phy_free(phy); 53 } 54 55 static struct mei_cl_device_id microread_mei_tbl[] = { 56 { MICROREAD_DRIVER_NAME, MEI_NFC_UUID, MEI_CL_VERSION_ANY}, 57 58 /* required last entry */ 59 { } 60 }; 61 MODULE_DEVICE_TABLE(mei, microread_mei_tbl); 62 63 static struct mei_cl_driver microread_driver = { 64 .id_table = microread_mei_tbl, 65 .name = MICROREAD_DRIVER_NAME, 66 67 .probe = microread_mei_probe, 68 .remove = microread_mei_remove, 69 }; 70 71 module_mei_cl_driver(microread_driver); 72 73 MODULE_LICENSE("GPL"); 74 MODULE_DESCRIPTION(DRIVER_DESC); 75