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
microread_mei_probe(struct mei_cl_device * cldev,const struct mei_cl_device_id * id)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
microread_mei_remove(struct mei_cl_device * cldev)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