drivers/nfc/microread/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 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/hci.h>
  14 #include <net/nfc/llc.h>
  15
  16 #include "../mei_phy.h"
  17 #include "microread.h"
  18
  19 #define MICROREAD_DRIVER_NAME "microread"
  20
  21 static int microread_mei_probe(struct mei_cl_device *cldev,
  22                                const struct mei_cl_device_id *id)
  23 {
  24         struct nfc_mei_phy *phy;
  25         int r;
  26
  27         pr_info("Probing NFC microread\n");
  28
  29         phy = nfc_mei_phy_alloc(cldev);
  30         if (!phy) {
  31                 pr_err("Cannot allocate memory for microread mei phy.\n");
  32                 return -ENOMEM;
  33         }
  34
  35         r = microread_probe(phy, &mei_phy_ops, LLC_NOP_NAME,
  36                             MEI_NFC_HEADER_SIZE, 0, MEI_NFC_MAX_HCI_PAYLOAD,
  37                             &phy->hdev);
  38         if (r < 0) {
  39                 nfc_mei_phy_free(phy);
  40
  41                 return r;
  42         }
  43
  44         return 0;
  45 }
  46
  47 static int microread_mei_remove(struct mei_cl_device *cldev)
  48 {
  49         struct nfc_mei_phy *phy = mei_cldev_get_drvdata(cldev);
  50
  51         microread_remove(phy->hdev);
  52
  53         nfc_mei_phy_free(phy);
  54
  55         return 0;
  56 }
  57
  58 static struct mei_cl_device_id microread_mei_tbl[] = {
  59         { MICROREAD_DRIVER_NAME, MEI_NFC_UUID, MEI_CL_VERSION_ANY},
  60
  61         /* required last entry */
  62         { }
  63 };
  64 MODULE_DEVICE_TABLE(mei, microread_mei_tbl);
  65
  66 static struct mei_cl_driver microread_driver = {
  67         .id_table = microread_mei_tbl,
  68         .name = MICROREAD_DRIVER_NAME,
  69
  70         .probe = microread_mei_probe,
  71         .remove = microread_mei_remove,
  72 };
  73
  74 module_mei_cl_driver(microread_driver);
  75
  76 MODULE_LICENSE("GPL");
  77 MODULE_DESCRIPTION(DRIVER_DESC);