| Samuel Ortiz | bb03dce | 2013-04-16 00:14:35 +0200 | [diff] [blame] | 1 | /* |
| 2 | * HCI based Driver for NXP pn544 NFC Chip |
| 3 | * |
| 4 | * Copyright (C) 2013 Intel Corporation. All rights reserved. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms and conditions of the GNU General Public License, |
| 8 | * version 2, as published by the Free Software Foundation. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the |
| 17 | * Free Software Foundation, Inc., |
| 18 | * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 19 | */ |
| 20 | |
| 21 | #include <linux/module.h> |
| 22 | #include <linux/mod_devicetable.h> |
| 23 | #include <linux/nfc.h> |
| 24 | #include <net/nfc/hci.h> |
| 25 | #include <net/nfc/llc.h> |
| 26 | |
| 27 | #include "../mei_phy.h" |
| 28 | #include "pn544.h" |
| 29 | |
| 30 | #define PN544_DRIVER_NAME "pn544" |
| 31 | |
| 32 | static int pn544_mei_probe(struct mei_cl_device *device, |
| 33 | const struct mei_cl_device_id *id) |
| 34 | { |
| 35 | struct nfc_mei_phy *phy; |
| 36 | int r; |
| 37 | |
| 38 | pr_info("Probing NFC pn544\n"); |
| 39 | |
| 40 | phy = nfc_mei_phy_alloc(device); |
| 41 | if (!phy) { |
| 42 | pr_err("Cannot allocate memory for pn544 mei phy.\n"); |
| 43 | return -ENOMEM; |
| 44 | } |
| 45 | |
| 46 | r = mei_cl_register_event_cb(device, nfc_mei_event_cb, phy); |
| 47 | if (r) { |
| 48 | pr_err(PN544_DRIVER_NAME ": event cb registration failed\n"); |
| 49 | goto err_out; |
| 50 | } |
| 51 | |
| 52 | r = pn544_hci_probe(phy, &mei_phy_ops, LLC_NOP_NAME, |
| 53 | MEI_NFC_HEADER_SIZE, 0, MEI_NFC_MAX_HCI_PAYLOAD, |
| 54 | &phy->hdev); |
| 55 | if (r < 0) |
| 56 | goto err_out; |
| 57 | |
| 58 | return 0; |
| 59 | |
| 60 | err_out: |
| 61 | nfc_mei_phy_free(phy); |
| 62 | |
| 63 | return r; |
| 64 | } |
| 65 | |
| 66 | static int pn544_mei_remove(struct mei_cl_device *device) |
| 67 | { |
| 68 | struct nfc_mei_phy *phy = mei_cl_get_drvdata(device); |
| 69 | |
| 70 | pr_info("Removing pn544\n"); |
| 71 | |
| 72 | pn544_hci_remove(phy->hdev); |
| 73 | |
| 74 | nfc_mei_phy_disable(phy); |
| 75 | |
| 76 | nfc_mei_phy_free(phy); |
| 77 | |
| 78 | return 0; |
| 79 | } |
| 80 | |
| 81 | static struct mei_cl_device_id pn544_mei_tbl[] = { |
| 82 | { PN544_DRIVER_NAME }, |
| 83 | |
| 84 | /* required last entry */ |
| 85 | { } |
| 86 | }; |
| 87 | MODULE_DEVICE_TABLE(mei, pn544_mei_tbl); |
| 88 | |
| 89 | static struct mei_cl_driver pn544_driver = { |
| 90 | .id_table = pn544_mei_tbl, |
| 91 | .name = PN544_DRIVER_NAME, |
| 92 | |
| 93 | .probe = pn544_mei_probe, |
| 94 | .remove = pn544_mei_remove, |
| 95 | }; |
| 96 | |
| 97 | static int pn544_mei_init(void) |
| 98 | { |
| 99 | int r; |
| 100 | |
| 101 | pr_debug(DRIVER_DESC ": %s\n", __func__); |
| 102 | |
| 103 | r = mei_cl_driver_register(&pn544_driver); |
| 104 | if (r) { |
| 105 | pr_err(PN544_DRIVER_NAME ": driver registration failed\n"); |
| 106 | return r; |
| 107 | } |
| 108 | |
| 109 | return 0; |
| 110 | } |
| 111 | |
| 112 | static void pn544_mei_exit(void) |
| 113 | { |
| 114 | mei_cl_driver_unregister(&pn544_driver); |
| 115 | } |
| 116 | |
| 117 | module_init(pn544_mei_init); |
| 118 | module_exit(pn544_mei_exit); |
| 119 | |
| 120 | MODULE_LICENSE("GPL"); |
| 121 | MODULE_DESCRIPTION(DRIVER_DESC); |