![Jeff Kirsher](/assets/img/avatar_default.png)
Several files refer to an old address for the Free Software Foundation in the file header comment. Resolve by replacing the address with the URL <http://www.gnu.org/licenses/> so that we do not have to keep updating the header comments anytime the address changes. CC: linux-wireless@vger.kernel.org CC: Lauro Ramos Venancio <lauro.venancio@openbossa.org> CC: Aloisio Almeida Jr <aloisio.almeida@openbossa.org> CC: Samuel Ortiz <sameo@linux.intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
726 lines
19 KiB
C
726 lines
19 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, see <http://www.gnu.org/licenses/>.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/slab.h>
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#include <linux/crc-ccitt.h>
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#include <linux/nfc.h>
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#include <net/nfc/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 "microread.h"
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/* Proprietary gates, events, commands and registers */
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/* Admin */
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#define MICROREAD_GATE_ID_ADM NFC_HCI_ADMIN_GATE
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#define MICROREAD_GATE_ID_MGT 0x01
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#define MICROREAD_GATE_ID_OS 0x02
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#define MICROREAD_GATE_ID_TESTRF 0x03
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#define MICROREAD_GATE_ID_LOOPBACK NFC_HCI_LOOPBACK_GATE
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#define MICROREAD_GATE_ID_IDT NFC_HCI_ID_MGMT_GATE
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#define MICROREAD_GATE_ID_LMS NFC_HCI_LINK_MGMT_GATE
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/* Reader */
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#define MICROREAD_GATE_ID_MREAD_GEN 0x10
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#define MICROREAD_GATE_ID_MREAD_ISO_B NFC_HCI_RF_READER_B_GATE
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#define MICROREAD_GATE_ID_MREAD_NFC_T1 0x12
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#define MICROREAD_GATE_ID_MREAD_ISO_A NFC_HCI_RF_READER_A_GATE
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#define MICROREAD_GATE_ID_MREAD_NFC_T3 0x14
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#define MICROREAD_GATE_ID_MREAD_ISO_15_3 0x15
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#define MICROREAD_GATE_ID_MREAD_ISO_15_2 0x16
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#define MICROREAD_GATE_ID_MREAD_ISO_B_3 0x17
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#define MICROREAD_GATE_ID_MREAD_BPRIME 0x18
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#define MICROREAD_GATE_ID_MREAD_ISO_A_3 0x19
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/* Card */
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#define MICROREAD_GATE_ID_MCARD_GEN 0x20
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#define MICROREAD_GATE_ID_MCARD_ISO_B 0x21
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#define MICROREAD_GATE_ID_MCARD_BPRIME 0x22
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#define MICROREAD_GATE_ID_MCARD_ISO_A 0x23
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#define MICROREAD_GATE_ID_MCARD_NFC_T3 0x24
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#define MICROREAD_GATE_ID_MCARD_ISO_15_3 0x25
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#define MICROREAD_GATE_ID_MCARD_ISO_15_2 0x26
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#define MICROREAD_GATE_ID_MCARD_ISO_B_2 0x27
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#define MICROREAD_GATE_ID_MCARD_ISO_CUSTOM 0x28
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#define MICROREAD_GATE_ID_SECURE_ELEMENT 0x2F
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/* P2P */
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#define MICROREAD_GATE_ID_P2P_GEN 0x30
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#define MICROREAD_GATE_ID_P2P_TARGET 0x31
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#define MICROREAD_PAR_P2P_TARGET_MODE 0x01
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#define MICROREAD_PAR_P2P_TARGET_GT 0x04
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#define MICROREAD_GATE_ID_P2P_INITIATOR 0x32
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#define MICROREAD_PAR_P2P_INITIATOR_GI 0x01
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#define MICROREAD_PAR_P2P_INITIATOR_GT 0x03
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/* Those pipes are created/opened by default in the chip */
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#define MICROREAD_PIPE_ID_LMS 0x00
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#define MICROREAD_PIPE_ID_ADMIN 0x01
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#define MICROREAD_PIPE_ID_MGT 0x02
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#define MICROREAD_PIPE_ID_OS 0x03
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#define MICROREAD_PIPE_ID_HDS_LOOPBACK 0x04
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#define MICROREAD_PIPE_ID_HDS_IDT 0x05
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#define MICROREAD_PIPE_ID_HDS_MCARD_ISO_B 0x08
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#define MICROREAD_PIPE_ID_HDS_MCARD_ISO_BPRIME 0x09
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#define MICROREAD_PIPE_ID_HDS_MCARD_ISO_A 0x0A
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#define MICROREAD_PIPE_ID_HDS_MCARD_ISO_15_3 0x0B
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#define MICROREAD_PIPE_ID_HDS_MCARD_ISO_15_2 0x0C
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#define MICROREAD_PIPE_ID_HDS_MCARD_NFC_T3 0x0D
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#define MICROREAD_PIPE_ID_HDS_MCARD_ISO_B_2 0x0E
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#define MICROREAD_PIPE_ID_HDS_MCARD_CUSTOM 0x0F
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#define MICROREAD_PIPE_ID_HDS_MREAD_ISO_B 0x10
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#define MICROREAD_PIPE_ID_HDS_MREAD_NFC_T1 0x11
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#define MICROREAD_PIPE_ID_HDS_MREAD_ISO_A 0x12
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#define MICROREAD_PIPE_ID_HDS_MREAD_ISO_15_3 0x13
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#define MICROREAD_PIPE_ID_HDS_MREAD_ISO_15_2 0x14
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#define MICROREAD_PIPE_ID_HDS_MREAD_NFC_T3 0x15
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#define MICROREAD_PIPE_ID_HDS_MREAD_ISO_B_3 0x16
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#define MICROREAD_PIPE_ID_HDS_MREAD_BPRIME 0x17
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#define MICROREAD_PIPE_ID_HDS_MREAD_ISO_A_3 0x18
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#define MICROREAD_PIPE_ID_HDS_MREAD_GEN 0x1B
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#define MICROREAD_PIPE_ID_HDS_STACKED_ELEMENT 0x1C
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#define MICROREAD_PIPE_ID_HDS_INSTANCES 0x1D
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#define MICROREAD_PIPE_ID_HDS_TESTRF 0x1E
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#define MICROREAD_PIPE_ID_HDS_P2P_TARGET 0x1F
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#define MICROREAD_PIPE_ID_HDS_P2P_INITIATOR 0x20
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/* Events */
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#define MICROREAD_EVT_MREAD_DISCOVERY_OCCURED NFC_HCI_EVT_TARGET_DISCOVERED
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#define MICROREAD_EVT_MREAD_CARD_FOUND 0x3D
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#define MICROREAD_EMCF_A_ATQA 0
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#define MICROREAD_EMCF_A_SAK 2
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#define MICROREAD_EMCF_A_LEN 3
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#define MICROREAD_EMCF_A_UID 4
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#define MICROREAD_EMCF_A3_ATQA 0
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#define MICROREAD_EMCF_A3_SAK 2
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#define MICROREAD_EMCF_A3_LEN 3
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#define MICROREAD_EMCF_A3_UID 4
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#define MICROREAD_EMCF_B_UID 0
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#define MICROREAD_EMCF_T1_ATQA 0
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#define MICROREAD_EMCF_T1_UID 4
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#define MICROREAD_EMCF_T3_UID 0
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#define MICROREAD_EVT_MREAD_DISCOVERY_START NFC_HCI_EVT_READER_REQUESTED
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#define MICROREAD_EVT_MREAD_DISCOVERY_START_SOME 0x3E
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#define MICROREAD_EVT_MREAD_DISCOVERY_STOP NFC_HCI_EVT_END_OPERATION
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#define MICROREAD_EVT_MREAD_SIM_REQUESTS 0x3F
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#define MICROREAD_EVT_MCARD_EXCHANGE NFC_HCI_EVT_TARGET_DISCOVERED
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#define MICROREAD_EVT_P2P_INITIATOR_EXCHANGE_TO_RF 0x20
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#define MICROREAD_EVT_P2P_INITIATOR_EXCHANGE_FROM_RF 0x21
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#define MICROREAD_EVT_MCARD_FIELD_ON 0x11
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#define MICROREAD_EVT_P2P_TARGET_ACTIVATED 0x13
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#define MICROREAD_EVT_P2P_TARGET_DEACTIVATED 0x12
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#define MICROREAD_EVT_MCARD_FIELD_OFF 0x14
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/* Commands */
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#define MICROREAD_CMD_MREAD_EXCHANGE 0x10
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#define MICROREAD_CMD_MREAD_SUBSCRIBE 0x3F
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/* Hosts IDs */
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#define MICROREAD_ELT_ID_HDS NFC_HCI_TERMINAL_HOST_ID
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#define MICROREAD_ELT_ID_SIM NFC_HCI_UICC_HOST_ID
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#define MICROREAD_ELT_ID_SE1 0x03
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#define MICROREAD_ELT_ID_SE2 0x04
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#define MICROREAD_ELT_ID_SE3 0x05
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static struct nfc_hci_gate microread_gates[] = {
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{MICROREAD_GATE_ID_ADM, MICROREAD_PIPE_ID_ADMIN},
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{MICROREAD_GATE_ID_LOOPBACK, MICROREAD_PIPE_ID_HDS_LOOPBACK},
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{MICROREAD_GATE_ID_IDT, MICROREAD_PIPE_ID_HDS_IDT},
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{MICROREAD_GATE_ID_LMS, MICROREAD_PIPE_ID_LMS},
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{MICROREAD_GATE_ID_MREAD_ISO_B, MICROREAD_PIPE_ID_HDS_MREAD_ISO_B},
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{MICROREAD_GATE_ID_MREAD_ISO_A, MICROREAD_PIPE_ID_HDS_MREAD_ISO_A},
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{MICROREAD_GATE_ID_MREAD_ISO_A_3, MICROREAD_PIPE_ID_HDS_MREAD_ISO_A_3},
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{MICROREAD_GATE_ID_MGT, MICROREAD_PIPE_ID_MGT},
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{MICROREAD_GATE_ID_OS, MICROREAD_PIPE_ID_OS},
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{MICROREAD_GATE_ID_MREAD_NFC_T1, MICROREAD_PIPE_ID_HDS_MREAD_NFC_T1},
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{MICROREAD_GATE_ID_MREAD_NFC_T3, MICROREAD_PIPE_ID_HDS_MREAD_NFC_T3},
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{MICROREAD_GATE_ID_P2P_TARGET, MICROREAD_PIPE_ID_HDS_P2P_TARGET},
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{MICROREAD_GATE_ID_P2P_INITIATOR, MICROREAD_PIPE_ID_HDS_P2P_INITIATOR}
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};
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/* Largest headroom needed for outgoing custom commands */
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#define MICROREAD_CMDS_HEADROOM 2
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#define MICROREAD_CMD_TAILROOM 2
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struct microread_info {
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struct nfc_phy_ops *phy_ops;
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void *phy_id;
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struct nfc_hci_dev *hdev;
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int async_cb_type;
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data_exchange_cb_t async_cb;
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void *async_cb_context;
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};
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static int microread_open(struct nfc_hci_dev *hdev)
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{
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struct microread_info *info = nfc_hci_get_clientdata(hdev);
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return info->phy_ops->enable(info->phy_id);
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}
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static void microread_close(struct nfc_hci_dev *hdev)
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{
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struct microread_info *info = nfc_hci_get_clientdata(hdev);
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info->phy_ops->disable(info->phy_id);
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}
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static int microread_hci_ready(struct nfc_hci_dev *hdev)
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{
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int r;
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u8 param[4];
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param[0] = 0x03;
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r = nfc_hci_send_cmd(hdev, MICROREAD_GATE_ID_MREAD_ISO_A,
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MICROREAD_CMD_MREAD_SUBSCRIBE, param, 1, NULL);
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if (r)
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return r;
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r = nfc_hci_send_cmd(hdev, MICROREAD_GATE_ID_MREAD_ISO_A_3,
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MICROREAD_CMD_MREAD_SUBSCRIBE, NULL, 0, NULL);
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if (r)
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return r;
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param[0] = 0x00;
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param[1] = 0x03;
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param[2] = 0x00;
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r = nfc_hci_send_cmd(hdev, MICROREAD_GATE_ID_MREAD_ISO_B,
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MICROREAD_CMD_MREAD_SUBSCRIBE, param, 3, NULL);
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if (r)
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return r;
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r = nfc_hci_send_cmd(hdev, MICROREAD_GATE_ID_MREAD_NFC_T1,
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MICROREAD_CMD_MREAD_SUBSCRIBE, NULL, 0, NULL);
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if (r)
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return r;
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param[0] = 0xFF;
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param[1] = 0xFF;
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param[2] = 0x00;
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param[3] = 0x00;
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r = nfc_hci_send_cmd(hdev, MICROREAD_GATE_ID_MREAD_NFC_T3,
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MICROREAD_CMD_MREAD_SUBSCRIBE, param, 4, NULL);
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return r;
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}
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static int microread_xmit(struct nfc_hci_dev *hdev, struct sk_buff *skb)
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{
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struct microread_info *info = nfc_hci_get_clientdata(hdev);
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return info->phy_ops->write(info->phy_id, skb);
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}
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static int microread_start_poll(struct nfc_hci_dev *hdev,
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u32 im_protocols, u32 tm_protocols)
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{
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int r;
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u8 param[2];
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u8 mode;
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param[0] = 0x00;
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param[1] = 0x00;
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if (im_protocols & NFC_PROTO_ISO14443_MASK)
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param[0] |= (1 << 2);
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if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
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param[0] |= 1;
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if (im_protocols & NFC_PROTO_MIFARE_MASK)
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param[1] |= 1;
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if (im_protocols & NFC_PROTO_JEWEL_MASK)
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param[0] |= (1 << 1);
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if (im_protocols & NFC_PROTO_FELICA_MASK)
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param[0] |= (1 << 5);
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if (im_protocols & NFC_PROTO_NFC_DEP_MASK)
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param[1] |= (1 << 1);
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if ((im_protocols | tm_protocols) & NFC_PROTO_NFC_DEP_MASK) {
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hdev->gb = nfc_get_local_general_bytes(hdev->ndev,
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&hdev->gb_len);
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if (hdev->gb == NULL || hdev->gb_len == 0) {
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im_protocols &= ~NFC_PROTO_NFC_DEP_MASK;
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tm_protocols &= ~NFC_PROTO_NFC_DEP_MASK;
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}
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}
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r = nfc_hci_send_event(hdev, MICROREAD_GATE_ID_MREAD_ISO_A,
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MICROREAD_EVT_MREAD_DISCOVERY_STOP, NULL, 0);
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if (r)
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return r;
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mode = 0xff;
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r = nfc_hci_set_param(hdev, MICROREAD_GATE_ID_P2P_TARGET,
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MICROREAD_PAR_P2P_TARGET_MODE, &mode, 1);
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if (r)
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return r;
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if (im_protocols & NFC_PROTO_NFC_DEP_MASK) {
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r = nfc_hci_set_param(hdev, MICROREAD_GATE_ID_P2P_INITIATOR,
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MICROREAD_PAR_P2P_INITIATOR_GI,
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hdev->gb, hdev->gb_len);
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if (r)
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return r;
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}
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if (tm_protocols & NFC_PROTO_NFC_DEP_MASK) {
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r = nfc_hci_set_param(hdev, MICROREAD_GATE_ID_P2P_TARGET,
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MICROREAD_PAR_P2P_TARGET_GT,
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hdev->gb, hdev->gb_len);
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if (r)
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return r;
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mode = 0x02;
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r = nfc_hci_set_param(hdev, MICROREAD_GATE_ID_P2P_TARGET,
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MICROREAD_PAR_P2P_TARGET_MODE, &mode, 1);
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if (r)
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return r;
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}
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return nfc_hci_send_event(hdev, MICROREAD_GATE_ID_MREAD_ISO_A,
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MICROREAD_EVT_MREAD_DISCOVERY_START_SOME,
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param, 2);
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}
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static int microread_dep_link_up(struct nfc_hci_dev *hdev,
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struct nfc_target *target, u8 comm_mode,
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u8 *gb, size_t gb_len)
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{
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struct sk_buff *rgb_skb = NULL;
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int r;
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r = nfc_hci_get_param(hdev, target->hci_reader_gate,
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MICROREAD_PAR_P2P_INITIATOR_GT, &rgb_skb);
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if (r < 0)
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return r;
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if (rgb_skb->len == 0 || rgb_skb->len > NFC_GB_MAXSIZE) {
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r = -EPROTO;
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goto exit;
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}
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r = nfc_set_remote_general_bytes(hdev->ndev, rgb_skb->data,
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rgb_skb->len);
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if (r == 0)
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r = nfc_dep_link_is_up(hdev->ndev, target->idx, comm_mode,
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NFC_RF_INITIATOR);
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exit:
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kfree_skb(rgb_skb);
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return r;
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}
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static int microread_dep_link_down(struct nfc_hci_dev *hdev)
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{
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return nfc_hci_send_event(hdev, MICROREAD_GATE_ID_P2P_INITIATOR,
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MICROREAD_EVT_MREAD_DISCOVERY_STOP, NULL, 0);
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}
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static int microread_target_from_gate(struct nfc_hci_dev *hdev, u8 gate,
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struct nfc_target *target)
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{
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switch (gate) {
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case MICROREAD_GATE_ID_P2P_INITIATOR:
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target->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
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break;
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default:
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return -EPROTO;
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}
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return 0;
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}
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static int microread_complete_target_discovered(struct nfc_hci_dev *hdev,
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u8 gate,
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struct nfc_target *target)
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{
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return 0;
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}
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#define MICROREAD_CB_TYPE_READER_ALL 1
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static void microread_im_transceive_cb(void *context, struct sk_buff *skb,
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int err)
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{
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struct microread_info *info = context;
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switch (info->async_cb_type) {
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case MICROREAD_CB_TYPE_READER_ALL:
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if (err == 0) {
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if (skb->len == 0) {
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err = -EPROTO;
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kfree_skb(skb);
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info->async_cb(info->async_cb_context, NULL,
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-EPROTO);
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return;
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}
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if (skb->data[skb->len - 1] != 0) {
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err = nfc_hci_result_to_errno(
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skb->data[skb->len - 1]);
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kfree_skb(skb);
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info->async_cb(info->async_cb_context, NULL,
|
|
err);
|
|
return;
|
|
}
|
|
|
|
skb_trim(skb, skb->len - 1); /* RF Error ind. */
|
|
}
|
|
info->async_cb(info->async_cb_context, skb, err);
|
|
break;
|
|
default:
|
|
if (err == 0)
|
|
kfree_skb(skb);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Returns:
|
|
* <= 0: driver handled the data exchange
|
|
* 1: driver doesn't especially handle, please do standard processing
|
|
*/
|
|
static int microread_im_transceive(struct nfc_hci_dev *hdev,
|
|
struct nfc_target *target,
|
|
struct sk_buff *skb, data_exchange_cb_t cb,
|
|
void *cb_context)
|
|
{
|
|
struct microread_info *info = nfc_hci_get_clientdata(hdev);
|
|
u8 control_bits;
|
|
u16 crc;
|
|
|
|
pr_info("data exchange to gate 0x%x\n", target->hci_reader_gate);
|
|
|
|
if (target->hci_reader_gate == MICROREAD_GATE_ID_P2P_INITIATOR) {
|
|
*skb_push(skb, 1) = 0;
|
|
|
|
return nfc_hci_send_event(hdev, target->hci_reader_gate,
|
|
MICROREAD_EVT_P2P_INITIATOR_EXCHANGE_TO_RF,
|
|
skb->data, skb->len);
|
|
}
|
|
|
|
switch (target->hci_reader_gate) {
|
|
case MICROREAD_GATE_ID_MREAD_ISO_A:
|
|
control_bits = 0xCB;
|
|
break;
|
|
case MICROREAD_GATE_ID_MREAD_ISO_A_3:
|
|
control_bits = 0xCB;
|
|
break;
|
|
case MICROREAD_GATE_ID_MREAD_ISO_B:
|
|
control_bits = 0xCB;
|
|
break;
|
|
case MICROREAD_GATE_ID_MREAD_NFC_T1:
|
|
control_bits = 0x1B;
|
|
|
|
crc = crc_ccitt(0xffff, skb->data, skb->len);
|
|
crc = ~crc;
|
|
*skb_put(skb, 1) = crc & 0xff;
|
|
*skb_put(skb, 1) = crc >> 8;
|
|
break;
|
|
case MICROREAD_GATE_ID_MREAD_NFC_T3:
|
|
control_bits = 0xDB;
|
|
break;
|
|
default:
|
|
pr_info("Abort im_transceive to invalid gate 0x%x\n",
|
|
target->hci_reader_gate);
|
|
return 1;
|
|
}
|
|
|
|
*skb_push(skb, 1) = control_bits;
|
|
|
|
info->async_cb_type = MICROREAD_CB_TYPE_READER_ALL;
|
|
info->async_cb = cb;
|
|
info->async_cb_context = cb_context;
|
|
|
|
return nfc_hci_send_cmd_async(hdev, target->hci_reader_gate,
|
|
MICROREAD_CMD_MREAD_EXCHANGE,
|
|
skb->data, skb->len,
|
|
microread_im_transceive_cb, info);
|
|
}
|
|
|
|
static int microread_tm_send(struct nfc_hci_dev *hdev, struct sk_buff *skb)
|
|
{
|
|
int r;
|
|
|
|
r = nfc_hci_send_event(hdev, MICROREAD_GATE_ID_P2P_TARGET,
|
|
MICROREAD_EVT_MCARD_EXCHANGE,
|
|
skb->data, skb->len);
|
|
|
|
kfree_skb(skb);
|
|
|
|
return r;
|
|
}
|
|
|
|
static void microread_target_discovered(struct nfc_hci_dev *hdev, u8 gate,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct nfc_target *targets;
|
|
int r = 0;
|
|
|
|
pr_info("target discovered to gate 0x%x\n", gate);
|
|
|
|
targets = kzalloc(sizeof(struct nfc_target), GFP_KERNEL);
|
|
if (targets == NULL) {
|
|
r = -ENOMEM;
|
|
goto exit;
|
|
}
|
|
|
|
targets->hci_reader_gate = gate;
|
|
|
|
switch (gate) {
|
|
case MICROREAD_GATE_ID_MREAD_ISO_A:
|
|
targets->supported_protocols =
|
|
nfc_hci_sak_to_protocol(skb->data[MICROREAD_EMCF_A_SAK]);
|
|
targets->sens_res =
|
|
be16_to_cpu(*(u16 *)&skb->data[MICROREAD_EMCF_A_ATQA]);
|
|
targets->sel_res = skb->data[MICROREAD_EMCF_A_SAK];
|
|
memcpy(targets->nfcid1, &skb->data[MICROREAD_EMCF_A_UID],
|
|
skb->data[MICROREAD_EMCF_A_LEN]);
|
|
targets->nfcid1_len = skb->data[MICROREAD_EMCF_A_LEN];
|
|
break;
|
|
case MICROREAD_GATE_ID_MREAD_ISO_A_3:
|
|
targets->supported_protocols =
|
|
nfc_hci_sak_to_protocol(skb->data[MICROREAD_EMCF_A3_SAK]);
|
|
targets->sens_res =
|
|
be16_to_cpu(*(u16 *)&skb->data[MICROREAD_EMCF_A3_ATQA]);
|
|
targets->sel_res = skb->data[MICROREAD_EMCF_A3_SAK];
|
|
memcpy(targets->nfcid1, &skb->data[MICROREAD_EMCF_A3_UID],
|
|
skb->data[MICROREAD_EMCF_A3_LEN]);
|
|
targets->nfcid1_len = skb->data[MICROREAD_EMCF_A3_LEN];
|
|
break;
|
|
case MICROREAD_GATE_ID_MREAD_ISO_B:
|
|
targets->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
|
|
memcpy(targets->nfcid1, &skb->data[MICROREAD_EMCF_B_UID], 4);
|
|
targets->nfcid1_len = 4;
|
|
break;
|
|
case MICROREAD_GATE_ID_MREAD_NFC_T1:
|
|
targets->supported_protocols = NFC_PROTO_JEWEL_MASK;
|
|
targets->sens_res =
|
|
le16_to_cpu(*(u16 *)&skb->data[MICROREAD_EMCF_T1_ATQA]);
|
|
memcpy(targets->nfcid1, &skb->data[MICROREAD_EMCF_T1_UID], 4);
|
|
targets->nfcid1_len = 4;
|
|
break;
|
|
case MICROREAD_GATE_ID_MREAD_NFC_T3:
|
|
targets->supported_protocols = NFC_PROTO_FELICA_MASK;
|
|
memcpy(targets->nfcid1, &skb->data[MICROREAD_EMCF_T3_UID], 8);
|
|
targets->nfcid1_len = 8;
|
|
break;
|
|
default:
|
|
pr_info("discard target discovered to gate 0x%x\n", gate);
|
|
goto exit_free;
|
|
}
|
|
|
|
r = nfc_targets_found(hdev->ndev, targets, 1);
|
|
|
|
exit_free:
|
|
kfree(targets);
|
|
|
|
exit:
|
|
kfree_skb(skb);
|
|
|
|
if (r)
|
|
pr_err("Failed to handle discovered target err=%d\n", r);
|
|
}
|
|
|
|
static int microread_event_received(struct nfc_hci_dev *hdev, u8 gate,
|
|
u8 event, struct sk_buff *skb)
|
|
{
|
|
int r;
|
|
u8 mode;
|
|
|
|
pr_info("Microread received event 0x%x to gate 0x%x\n", event, gate);
|
|
|
|
switch (event) {
|
|
case MICROREAD_EVT_MREAD_CARD_FOUND:
|
|
microread_target_discovered(hdev, gate, skb);
|
|
return 0;
|
|
|
|
case MICROREAD_EVT_P2P_INITIATOR_EXCHANGE_FROM_RF:
|
|
if (skb->len < 1) {
|
|
kfree_skb(skb);
|
|
return -EPROTO;
|
|
}
|
|
|
|
if (skb->data[skb->len - 1]) {
|
|
kfree_skb(skb);
|
|
return -EIO;
|
|
}
|
|
|
|
skb_trim(skb, skb->len - 1);
|
|
|
|
r = nfc_tm_data_received(hdev->ndev, skb);
|
|
break;
|
|
|
|
case MICROREAD_EVT_MCARD_FIELD_ON:
|
|
case MICROREAD_EVT_MCARD_FIELD_OFF:
|
|
kfree_skb(skb);
|
|
return 0;
|
|
|
|
case MICROREAD_EVT_P2P_TARGET_ACTIVATED:
|
|
r = nfc_tm_activated(hdev->ndev, NFC_PROTO_NFC_DEP_MASK,
|
|
NFC_COMM_PASSIVE, skb->data,
|
|
skb->len);
|
|
|
|
kfree_skb(skb);
|
|
break;
|
|
|
|
case MICROREAD_EVT_MCARD_EXCHANGE:
|
|
if (skb->len < 1) {
|
|
kfree_skb(skb);
|
|
return -EPROTO;
|
|
}
|
|
|
|
if (skb->data[skb->len-1]) {
|
|
kfree_skb(skb);
|
|
return -EIO;
|
|
}
|
|
|
|
skb_trim(skb, skb->len - 1);
|
|
|
|
r = nfc_tm_data_received(hdev->ndev, skb);
|
|
break;
|
|
|
|
case MICROREAD_EVT_P2P_TARGET_DEACTIVATED:
|
|
kfree_skb(skb);
|
|
|
|
mode = 0xff;
|
|
r = nfc_hci_set_param(hdev, MICROREAD_GATE_ID_P2P_TARGET,
|
|
MICROREAD_PAR_P2P_TARGET_MODE, &mode, 1);
|
|
if (r)
|
|
break;
|
|
|
|
r = nfc_hci_send_event(hdev, gate,
|
|
MICROREAD_EVT_MREAD_DISCOVERY_STOP, NULL,
|
|
0);
|
|
break;
|
|
|
|
default:
|
|
return 1;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
static struct nfc_hci_ops microread_hci_ops = {
|
|
.open = microread_open,
|
|
.close = microread_close,
|
|
.hci_ready = microread_hci_ready,
|
|
.xmit = microread_xmit,
|
|
.start_poll = microread_start_poll,
|
|
.dep_link_up = microread_dep_link_up,
|
|
.dep_link_down = microread_dep_link_down,
|
|
.target_from_gate = microread_target_from_gate,
|
|
.complete_target_discovered = microread_complete_target_discovered,
|
|
.im_transceive = microread_im_transceive,
|
|
.tm_send = microread_tm_send,
|
|
.check_presence = NULL,
|
|
.event_received = microread_event_received,
|
|
};
|
|
|
|
int microread_probe(void *phy_id, struct nfc_phy_ops *phy_ops, char *llc_name,
|
|
int phy_headroom, int phy_tailroom, int phy_payload,
|
|
struct nfc_hci_dev **hdev)
|
|
{
|
|
struct microread_info *info;
|
|
unsigned long quirks = 0;
|
|
u32 protocols;
|
|
struct nfc_hci_init_data init_data;
|
|
int r;
|
|
|
|
info = kzalloc(sizeof(struct microread_info), GFP_KERNEL);
|
|
if (!info) {
|
|
r = -ENOMEM;
|
|
goto err_info_alloc;
|
|
}
|
|
|
|
info->phy_ops = phy_ops;
|
|
info->phy_id = phy_id;
|
|
|
|
init_data.gate_count = ARRAY_SIZE(microread_gates);
|
|
memcpy(init_data.gates, microread_gates, sizeof(microread_gates));
|
|
|
|
strcpy(init_data.session_id, "MICROREA");
|
|
|
|
set_bit(NFC_HCI_QUIRK_SHORT_CLEAR, &quirks);
|
|
|
|
protocols = NFC_PROTO_JEWEL_MASK |
|
|
NFC_PROTO_MIFARE_MASK |
|
|
NFC_PROTO_FELICA_MASK |
|
|
NFC_PROTO_ISO14443_MASK |
|
|
NFC_PROTO_ISO14443_B_MASK |
|
|
NFC_PROTO_NFC_DEP_MASK;
|
|
|
|
info->hdev = nfc_hci_allocate_device(µread_hci_ops, &init_data,
|
|
quirks, protocols, llc_name,
|
|
phy_headroom +
|
|
MICROREAD_CMDS_HEADROOM,
|
|
phy_tailroom +
|
|
MICROREAD_CMD_TAILROOM,
|
|
phy_payload);
|
|
if (!info->hdev) {
|
|
pr_err("Cannot allocate nfc hdev\n");
|
|
r = -ENOMEM;
|
|
goto err_alloc_hdev;
|
|
}
|
|
|
|
nfc_hci_set_clientdata(info->hdev, info);
|
|
|
|
r = nfc_hci_register_device(info->hdev);
|
|
if (r)
|
|
goto err_regdev;
|
|
|
|
*hdev = info->hdev;
|
|
|
|
return 0;
|
|
|
|
err_regdev:
|
|
nfc_hci_free_device(info->hdev);
|
|
|
|
err_alloc_hdev:
|
|
kfree(info);
|
|
|
|
err_info_alloc:
|
|
return r;
|
|
}
|
|
EXPORT_SYMBOL(microread_probe);
|
|
|
|
void microread_remove(struct nfc_hci_dev *hdev)
|
|
{
|
|
struct microread_info *info = nfc_hci_get_clientdata(hdev);
|
|
|
|
nfc_hci_unregister_device(hdev);
|
|
nfc_hci_free_device(hdev);
|
|
kfree(info);
|
|
}
|
|
EXPORT_SYMBOL(microread_remove);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|