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
pn544_mei_probe(struct mei_cl_device * cldev,const struct mei_cl_device_id * id)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
pn544_mei_remove(struct mei_cl_device * cldev)45 static int 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 return 0;
56 }
57
58 static struct mei_cl_device_id pn544_mei_tbl[] = {
59 { PN544_DRIVER_NAME, MEI_NFC_UUID, MEI_CL_VERSION_ANY},
60
61 /* required last entry */
62 { }
63 };
64 MODULE_DEVICE_TABLE(mei, pn544_mei_tbl);
65
66 static struct mei_cl_driver pn544_driver = {
67 .id_table = pn544_mei_tbl,
68 .name = PN544_DRIVER_NAME,
69
70 .probe = pn544_mei_probe,
71 .remove = pn544_mei_remove,
72 };
73
74 module_mei_cl_driver(pn544_driver);
75
76 MODULE_LICENSE("GPL");
77 MODULE_DESCRIPTION(DRIVER_DESC);
78