1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 2013 Intel Corporation. All rights reserved. 4 * 5 * HCI based Driver for NXP pn544 NFC Chip 6 */ 7 8 #include <linux/module.h> 9 #include <linux/mod_devicetable.h> 10 #include <linux/nfc.h> 11 #include <net/nfc/hci.h> 12 #include <net/nfc/llc.h> 13 14 #include "../mei_phy.h" 15 #include "pn544.h" 16 17 #define PN544_DRIVER_NAME "pn544" 18 19 static int pn544_mei_probe(struct mei_cl_device *cldev, 20 const struct mei_cl_device_id *id) 21 { 22 struct nfc_mei_phy *phy; 23 int r; 24 25 pr_info("Probing NFC pn544\n"); 26 27 phy = nfc_mei_phy_alloc(cldev); 28 if (!phy) { 29 pr_err("Cannot allocate memory for pn544 mei phy.\n"); 30 return -ENOMEM; 31 } 32 33 r = pn544_hci_probe(phy, &mei_phy_ops, LLC_NOP_NAME, 34 MEI_NFC_HEADER_SIZE, 0, MEI_NFC_MAX_HCI_PAYLOAD, 35 NULL, &phy->hdev); 36 if (r < 0) { 37 nfc_mei_phy_free(phy); 38 39 return r; 40 } 41 42 return 0; 43 } 44 45 static void pn544_mei_remove(struct mei_cl_device *cldev) 46 { 47 struct nfc_mei_phy *phy = mei_cldev_get_drvdata(cldev); 48 49 pr_info("Removing pn544\n"); 50 51 pn544_hci_remove(phy->hdev); 52 53 nfc_mei_phy_free(phy); 54 } 55 56 static struct mei_cl_device_id pn544_mei_tbl[] = { 57 { PN544_DRIVER_NAME, MEI_NFC_UUID, MEI_CL_VERSION_ANY}, 58 59 /* required last entry */ 60 { } 61 }; 62 MODULE_DEVICE_TABLE(mei, pn544_mei_tbl); 63 64 static struct mei_cl_driver pn544_driver = { 65 .id_table = pn544_mei_tbl, 66 .name = PN544_DRIVER_NAME, 67 68 .probe = pn544_mei_probe, 69 .remove = pn544_mei_remove, 70 }; 71 72 module_mei_cl_driver(pn544_driver); 73 74 MODULE_LICENSE("GPL"); 75 MODULE_DESCRIPTION(DRIVER_DESC); 76