drivers/nfc/pn544/mei.c

   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 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);