4912e2fe74
This isolates the common code that is required to use an mei bus nfc device from an NFC HCI drivers. This prepares for future drivers for NFC chips connected behind an Intel Management Engine controller. The microread_mei HCI driver is also modified to use that common code. Signed-off-by: Eric Lapuyade <eric.lapuyade@intel.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
122 lines
2.7 KiB
C
122 lines
2.7 KiB
C
/*
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* HCI based Driver for Inside Secure microread NFC Chip
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*
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* Copyright (C) 2013 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the
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* Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <linux/module.h>
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#include <linux/mod_devicetable.h>
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#include <linux/nfc.h>
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#include <net/nfc/hci.h>
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#include <net/nfc/llc.h>
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#include "../mei_phy.h"
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#include "microread.h"
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#define MICROREAD_DRIVER_NAME "microread"
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static int microread_mei_probe(struct mei_cl_device *device,
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const struct mei_cl_device_id *id)
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{
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struct nfc_mei_phy *phy;
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int r;
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pr_info("Probing NFC microread\n");
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phy = nfc_mei_phy_alloc(device);
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if (!phy) {
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pr_err("Cannot allocate memory for microread mei phy.\n");
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return -ENOMEM;
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}
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r = mei_cl_register_event_cb(device, nfc_mei_event_cb, phy);
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if (r) {
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pr_err(MICROREAD_DRIVER_NAME ": event cb registration failed\n");
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goto err_out;
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}
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r = microread_probe(phy, &mei_phy_ops, LLC_NOP_NAME,
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MEI_NFC_HEADER_SIZE, 0, MEI_NFC_MAX_HCI_PAYLOAD,
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&phy->hdev);
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if (r < 0)
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goto err_out;
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return 0;
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err_out:
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nfc_mei_phy_free(phy);
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return r;
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}
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static int microread_mei_remove(struct mei_cl_device *device)
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{
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struct nfc_mei_phy *phy = mei_cl_get_drvdata(device);
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pr_info("Removing microread\n");
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microread_remove(phy->hdev);
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nfc_mei_phy_disable(phy);
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nfc_mei_phy_free(phy);
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return 0;
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}
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static struct mei_cl_device_id microread_mei_tbl[] = {
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{ MICROREAD_DRIVER_NAME },
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/* required last entry */
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{ }
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};
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MODULE_DEVICE_TABLE(mei, microread_mei_tbl);
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static struct mei_cl_driver microread_driver = {
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.id_table = microread_mei_tbl,
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.name = MICROREAD_DRIVER_NAME,
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.probe = microread_mei_probe,
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.remove = microread_mei_remove,
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};
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static int microread_mei_init(void)
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{
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int r;
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pr_debug(DRIVER_DESC ": %s\n", __func__);
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r = mei_cl_driver_register(µread_driver);
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if (r) {
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pr_err(MICROREAD_DRIVER_NAME ": driver registration failed\n");
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return r;
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}
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return 0;
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}
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static void microread_mei_exit(void)
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{
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mei_cl_driver_unregister(µread_driver);
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}
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module_init(microread_mei_init);
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module_exit(microread_mei_exit);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION(DRIVER_DESC);
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