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NFC: HCI support
This is an implementation of ETSI TS 102 622 specification. Many NFC chipsets use HCI as the host <-> target protocol on top of a serial link like i2c. Signed-off-by: Eric Lapuyade <eric.lapuyade@intel.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Eric Lapuyade
committed by
John W. Linville
John W. Linville
parent
e1da0efa2e
commit
8b8d2e08bf
@@ -0,0 +1,198 @@
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/*
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* Copyright (C) 2011 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
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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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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#ifndef __NET_HCI_H
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#define __NET_HCI_H
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#include <linux/skbuff.h>
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#include <net/nfc/nfc.h>
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struct nfc_hci_dev;
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struct nfc_hci_ops {
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int (*open) (struct nfc_hci_dev *hdev);
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void (*close) (struct nfc_hci_dev *hdev);
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int (*hci_ready) (struct nfc_hci_dev *hdev);
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int (*xmit) (struct nfc_hci_dev *hdev, struct sk_buff *skb);
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int (*start_poll) (struct nfc_hci_dev *hdev, u32 protocols);
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int (*target_from_gate) (struct nfc_hci_dev *hdev, u8 gate,
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struct nfc_target *target);
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int (*complete_target_discovered) (struct nfc_hci_dev *hdev, u8 gate,
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struct nfc_target *target);
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int (*data_exchange) (struct nfc_hci_dev *hdev,
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struct nfc_target *target,
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struct sk_buff *skb, struct sk_buff **res_skb);
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};
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#define NFC_HCI_MAX_CUSTOM_GATES 15
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struct nfc_hci_init_data {
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u8 gate_count;
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u8 gates[NFC_HCI_MAX_CUSTOM_GATES];
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char session_id[9];
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};
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typedef int (*xmit) (struct sk_buff *skb, void *cb_data);
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#define NFC_HCI_MAX_GATES 256
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struct nfc_hci_dev {
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struct nfc_dev *ndev;
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u32 max_data_link_payload;
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struct mutex msg_tx_mutex;
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struct list_head msg_tx_queue;
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struct workqueue_struct *msg_tx_wq;
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struct work_struct msg_tx_work;
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struct timer_list cmd_timer;
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struct hci_msg *cmd_pending_msg;
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struct sk_buff_head rx_hcp_frags;
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struct workqueue_struct *msg_rx_wq;
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struct work_struct msg_rx_work;
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struct sk_buff_head msg_rx_queue;
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struct nfc_hci_ops *ops;
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struct nfc_hci_init_data init_data;
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void *clientdata;
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u8 gate2pipe[NFC_HCI_MAX_GATES];
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bool poll_started;
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struct nfc_target *targets;
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int target_count;
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u8 sw_romlib;
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u8 sw_patch;
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u8 sw_flashlib_major;
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u8 sw_flashlib_minor;
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u8 hw_derivative;
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u8 hw_version;
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u8 hw_mpw;
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u8 hw_software;
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u8 hw_bsid;
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};
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/* hci device allocation */
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struct nfc_hci_dev *nfc_hci_allocate_device(struct nfc_hci_ops *ops,
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struct nfc_hci_init_data *init_data,
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u32 protocols,
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int tx_headroom,
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int tx_tailroom,
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int max_link_payload);
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void nfc_hci_free_device(struct nfc_hci_dev *hdev);
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int nfc_hci_register_device(struct nfc_hci_dev *hdev);
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void nfc_hci_unregister_device(struct nfc_hci_dev *hdev);
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void nfc_hci_set_clientdata(struct nfc_hci_dev *hdev, void *clientdata);
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void *nfc_hci_get_clientdata(struct nfc_hci_dev *hdev);
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/* Host IDs */
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#define NFC_HCI_HOST_CONTROLLER_ID 0x00
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#define NFC_HCI_TERMINAL_HOST_ID 0x01
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#define NFC_HCI_UICC_HOST_ID 0x02
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/* Host Controller Gates and registry indexes */
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#define NFC_HCI_ADMIN_GATE 0x00
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#define NFC_HCI_ADMIN_SESSION_IDENTITY 0x01
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#define NFC_HCI_ADMIN_MAX_PIPE 0x02
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#define NFC_HCI_ADMIN_WHITELIST 0x03
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#define NFC_HCI_ADMIN_HOST_LIST 0x04
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#define NFC_HCI_LOOPBACK_GATE 0x04
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#define NFC_HCI_ID_MGMT_GATE 0x05
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#define NFC_HCI_ID_MGMT_VERSION_SW 0x01
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#define NFC_HCI_ID_MGMT_VERSION_HW 0x03
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#define NFC_HCI_ID_MGMT_VENDOR_NAME 0x04
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#define NFC_HCI_ID_MGMT_MODEL_ID 0x05
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#define NFC_HCI_ID_MGMT_HCI_VERSION 0x02
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#define NFC_HCI_ID_MGMT_GATES_LIST 0x06
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#define NFC_HCI_LINK_MGMT_GATE 0x06
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#define NFC_HCI_LINK_MGMT_REC_ERROR 0x01
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#define NFC_HCI_RF_READER_B_GATE 0x11
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#define NFC_HCI_RF_READER_B_PUPI 0x03
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#define NFC_HCI_RF_READER_B_APPLICATION_DATA 0x04
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#define NFC_HCI_RF_READER_B_AFI 0x02
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#define NFC_HCI_RF_READER_B_HIGHER_LAYER_RESPONSE 0x01
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#define NFC_HCI_RF_READER_B_HIGHER_LAYER_DATA 0x05
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#define NFC_HCI_RF_READER_A_GATE 0x13
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#define NFC_HCI_RF_READER_A_UID 0x02
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#define NFC_HCI_RF_READER_A_ATQA 0x04
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#define NFC_HCI_RF_READER_A_APPLICATION_DATA 0x05
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#define NFC_HCI_RF_READER_A_SAK 0x03
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#define NFC_HCI_RF_READER_A_FWI_SFGT 0x06
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#define NFC_HCI_RF_READER_A_DATARATE_MAX 0x01
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#define NFC_HCI_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
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#define NFC_HCI_TYPE_A_SEL_PROT_MIFARE 0
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#define NFC_HCI_TYPE_A_SEL_PROT_ISO14443 1
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#define NFC_HCI_TYPE_A_SEL_PROT_DEP 2
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#define NFC_HCI_TYPE_A_SEL_PROT_ISO14443_DEP 3
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/* Generic events */
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#define NFC_HCI_EVT_HCI_END_OF_OPERATION 0x01
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#define NFC_HCI_EVT_POST_DATA 0x02
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#define NFC_HCI_EVT_HOT_PLUG 0x03
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/* Reader RF gates events */
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#define NFC_HCI_EVT_READER_REQUESTED 0x10
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#define NFC_HCI_EVT_END_OPERATION 0x11
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/* Reader Application gate events */
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#define NFC_HCI_EVT_TARGET_DISCOVERED 0x10
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/* receiving messages from lower layer */
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void nfc_hci_resp_received(struct nfc_hci_dev *hdev, u8 result,
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struct sk_buff *skb);
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void nfc_hci_cmd_received(struct nfc_hci_dev *hdev, u8 pipe, u8 cmd,
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struct sk_buff *skb);
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void nfc_hci_event_received(struct nfc_hci_dev *hdev, u8 pipe, u8 event,
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struct sk_buff *skb);
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void nfc_hci_recv_frame(struct nfc_hci_dev *hdev, struct sk_buff *skb);
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/* connecting to gates and sending hci instructions */
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int nfc_hci_connect_gate(struct nfc_hci_dev *hdev, u8 dest_host, u8 dest_gate);
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int nfc_hci_disconnect_gate(struct nfc_hci_dev *hdev, u8 gate);
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int nfc_hci_disconnect_all_gates(struct nfc_hci_dev *hdev);
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int nfc_hci_get_param(struct nfc_hci_dev *hdev, u8 gate, u8 idx,
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struct sk_buff **skb);
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int nfc_hci_set_param(struct nfc_hci_dev *hdev, u8 gate, u8 idx,
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const u8 *param, size_t param_len);
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int nfc_hci_send_cmd(struct nfc_hci_dev *hdev, u8 gate, u8 cmd,
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const u8 *param, size_t param_len, struct sk_buff **skb);
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int nfc_hci_send_response(struct nfc_hci_dev *hdev, u8 gate, u8 response,
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const u8 *param, size_t param_len);
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int nfc_hci_send_event(struct nfc_hci_dev *hdev, u8 gate, u8 event,
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const u8 *param, size_t param_len);
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#endif /* __NET_HCI_H */
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@@ -78,6 +78,7 @@ struct nfc_target {
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u8 sensb_res[NFC_SENSB_RES_MAXSIZE];
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u8 sensf_res_len;
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u8 sensf_res[NFC_SENSF_RES_MAXSIZE];
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u8 hci_reader_gate;
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};
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struct nfc_genl_data {
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@@ -14,6 +14,7 @@ menuconfig NFC
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be called nfc.
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source "net/nfc/nci/Kconfig"
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source "net/nfc/hci/Kconfig"
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source "net/nfc/llcp/Kconfig"
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source "drivers/nfc/Kconfig"
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@@ -4,6 +4,7 @@
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obj-$(CONFIG_NFC) += nfc.o
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obj-$(CONFIG_NFC_NCI) += nci/
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obj-$(CONFIG_NFC_HCI) += hci/
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nfc-objs := core.o netlink.o af_nfc.o rawsock.o
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nfc-$(CONFIG_NFC_LLCP) += llcp/llcp.o llcp/commands.o llcp/sock.o
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@@ -0,0 +1,8 @@
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config NFC_HCI
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depends on NFC
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tristate "NFC HCI implementation"
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default n
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help
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Say Y here if you want to build support for a kernel NFC HCI
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implementation. This is mostly needed for devices that only process
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HCI frames, like for example the NXP pn544.
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@@ -0,0 +1,7 @@
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#
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# Makefile for the Linux NFC HCI layer.
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#
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obj-$(CONFIG_NFC_HCI) += hci.o
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hci-y := core.o hcp.o command.o
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@@ -0,0 +1,354 @@
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/*
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* Copyright (C) 2012 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
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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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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#define pr_fmt(fmt) "hci: %s: " fmt, __func__
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/module.h>
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#include <net/nfc/hci.h>
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#include "hci.h"
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static int nfc_hci_result_to_errno(u8 result)
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{
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switch (result) {
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case NFC_HCI_ANY_OK:
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return 0;
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case NFC_HCI_ANY_E_TIMEOUT:
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return -ETIMEDOUT;
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default:
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return -1;
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}
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}
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static void nfc_hci_execute_cb(struct nfc_hci_dev *hdev, u8 result,
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struct sk_buff *skb, void *cb_data)
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{
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struct hcp_exec_waiter *hcp_ew = (struct hcp_exec_waiter *)cb_data;
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pr_debug("HCI Cmd completed with HCI result=%d\n", result);
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hcp_ew->exec_result = nfc_hci_result_to_errno(result);
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if (hcp_ew->exec_result == 0)
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hcp_ew->result_skb = skb;
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else
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kfree_skb(skb);
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hcp_ew->exec_complete = true;
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wake_up(hcp_ew->wq);
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}
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static int nfc_hci_execute_cmd(struct nfc_hci_dev *hdev, u8 pipe, u8 cmd,
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const u8 *param, size_t param_len,
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struct sk_buff **skb)
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{
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DECLARE_WAIT_QUEUE_HEAD_ONSTACK(ew_wq);
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struct hcp_exec_waiter hcp_ew;
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hcp_ew.wq = &ew_wq;
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hcp_ew.exec_complete = false;
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hcp_ew.result_skb = NULL;
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pr_debug("through pipe=%d, cmd=%d, plen=%zd\n", pipe, cmd, param_len);
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/* TODO: Define hci cmd execution delay. Should it be the same
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* for all commands?
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*/
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hcp_ew.exec_result = nfc_hci_hcp_message_tx(hdev, pipe,
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NFC_HCI_HCP_COMMAND, cmd,
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param, param_len,
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nfc_hci_execute_cb, &hcp_ew,
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3000);
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if (hcp_ew.exec_result < 0)
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return hcp_ew.exec_result;
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wait_event(ew_wq, hcp_ew.exec_complete == true);
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if (hcp_ew.exec_result == 0) {
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if (skb)
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*skb = hcp_ew.result_skb;
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else
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kfree_skb(hcp_ew.result_skb);
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}
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return hcp_ew.exec_result;
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}
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int nfc_hci_send_event(struct nfc_hci_dev *hdev, u8 gate, u8 event,
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const u8 *param, size_t param_len)
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{
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u8 pipe;
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pr_debug("%d to gate %d\n", event, gate);
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pipe = hdev->gate2pipe[gate];
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if (pipe == NFC_HCI_INVALID_PIPE)
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return -EADDRNOTAVAIL;
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return nfc_hci_hcp_message_tx(hdev, pipe, NFC_HCI_HCP_EVENT, event,
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param, param_len, NULL, NULL, 0);
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}
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EXPORT_SYMBOL(nfc_hci_send_event);
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int nfc_hci_send_response(struct nfc_hci_dev *hdev, u8 gate, u8 response,
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const u8 *param, size_t param_len)
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{
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u8 pipe;
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pr_debug("\n");
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pipe = hdev->gate2pipe[gate];
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if (pipe == NFC_HCI_INVALID_PIPE)
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return -EADDRNOTAVAIL;
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return nfc_hci_hcp_message_tx(hdev, pipe, NFC_HCI_HCP_RESPONSE,
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response, param, param_len, NULL, NULL,
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0);
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}
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EXPORT_SYMBOL(nfc_hci_send_response);
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/*
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* Execute an hci command sent to gate.
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* skb will contain response data if success. skb can be NULL if you are not
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* interested by the response.
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*/
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int nfc_hci_send_cmd(struct nfc_hci_dev *hdev, u8 gate, u8 cmd,
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const u8 *param, size_t param_len, struct sk_buff **skb)
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{
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u8 pipe;
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pr_debug("\n");
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pipe = hdev->gate2pipe[gate];
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if (pipe == NFC_HCI_INVALID_PIPE)
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return -EADDRNOTAVAIL;
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return nfc_hci_execute_cmd(hdev, pipe, cmd, param, param_len, skb);
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}
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EXPORT_SYMBOL(nfc_hci_send_cmd);
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int nfc_hci_set_param(struct nfc_hci_dev *hdev, u8 gate, u8 idx,
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const u8 *param, size_t param_len)
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{
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int r;
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u8 *tmp;
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/* TODO ELa: reg idx must be inserted before param, but we don't want
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* to ask the caller to do it to keep a simpler API.
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* For now, just create a new temporary param buffer. This is far from
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* optimal though, and the plan is to modify APIs to pass idx down to
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* nfc_hci_hcp_message_tx where the frame is actually built, thereby
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* eliminating the need for the temp allocation-copy here.
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*/
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pr_debug("idx=%d to gate %d\n", idx, gate);
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tmp = kmalloc(1 + param_len, GFP_KERNEL);
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if (tmp == NULL)
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return -ENOMEM;
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*tmp = idx;
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memcpy(tmp + 1, param, param_len);
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r = nfc_hci_send_cmd(hdev, gate, NFC_HCI_ANY_SET_PARAMETER,
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tmp, param_len + 1, NULL);
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kfree(tmp);
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return r;
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}
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EXPORT_SYMBOL(nfc_hci_set_param);
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int nfc_hci_get_param(struct nfc_hci_dev *hdev, u8 gate, u8 idx,
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struct sk_buff **skb)
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||||
{
|
||||
pr_debug("gate=%d regidx=%d\n", gate, idx);
|
||||
|
||||
return nfc_hci_send_cmd(hdev, gate, NFC_HCI_ANY_GET_PARAMETER,
|
||||
&idx, 1, skb);
|
||||
}
|
||||
EXPORT_SYMBOL(nfc_hci_get_param);
|
||||
|
||||
static int nfc_hci_open_pipe(struct nfc_hci_dev *hdev, u8 pipe)
|
||||
{
|
||||
struct sk_buff *skb;
|
||||
int r;
|
||||
|
||||
pr_debug("pipe=%d\n", pipe);
|
||||
|
||||
r = nfc_hci_execute_cmd(hdev, pipe, NFC_HCI_ANY_OPEN_PIPE,
|
||||
NULL, 0, &skb);
|
||||
if (r == 0) {
|
||||
/* dest host other than host controller will send
|
||||
* number of pipes already open on this gate before
|
||||
* execution. The number can be found in skb->data[0]
|
||||
*/
|
||||
kfree_skb(skb);
|
||||
}
|
||||
|
||||
return r;
|
||||
}
|
||||
|
||||
static int nfc_hci_close_pipe(struct nfc_hci_dev *hdev, u8 pipe)
|
||||
{
|
||||
pr_debug("\n");
|
||||
|
||||
return nfc_hci_execute_cmd(hdev, pipe, NFC_HCI_ANY_CLOSE_PIPE,
|
||||
NULL, 0, NULL);
|
||||
}
|
||||
|
||||
static u8 nfc_hci_create_pipe(struct nfc_hci_dev *hdev, u8 dest_host,
|
||||
u8 dest_gate, int *result)
|
||||
{
|
||||
struct sk_buff *skb;
|
||||
struct hci_create_pipe_params params;
|
||||
struct hci_create_pipe_resp *resp;
|
||||
u8 pipe;
|
||||
|
||||
pr_debug("gate=%d\n", dest_gate);
|
||||
|
||||
params.src_gate = NFC_HCI_ADMIN_GATE;
|
||||
params.dest_host = dest_host;
|
||||
params.dest_gate = dest_gate;
|
||||
|
||||
*result = nfc_hci_execute_cmd(hdev, NFC_HCI_ADMIN_PIPE,
|
||||
NFC_HCI_ADM_CREATE_PIPE,
|
||||
(u8 *) ¶ms, sizeof(params), &skb);
|
||||
if (*result == 0) {
|
||||
resp = (struct hci_create_pipe_resp *)skb->data;
|
||||
pipe = resp->pipe;
|
||||
kfree_skb(skb);
|
||||
|
||||
pr_debug("pipe created=%d\n", pipe);
|
||||
|
||||
return pipe;
|
||||
} else
|
||||
return NFC_HCI_INVALID_PIPE;
|
||||
}
|
||||
|
||||
static int nfc_hci_delete_pipe(struct nfc_hci_dev *hdev, u8 pipe)
|
||||
{
|
||||
pr_debug("\n");
|
||||
|
||||
return nfc_hci_execute_cmd(hdev, NFC_HCI_ADMIN_PIPE,
|
||||
NFC_HCI_ADM_DELETE_PIPE, &pipe, 1, NULL);
|
||||
}
|
||||
|
||||
static int nfc_hci_clear_all_pipes(struct nfc_hci_dev *hdev)
|
||||
{
|
||||
int r;
|
||||
|
||||
u8 param[2];
|
||||
|
||||
/* TODO: Find out what the identity reference data is
|
||||
* and fill param with it. HCI spec 6.1.3.5 */
|
||||
|
||||
pr_debug("\n");
|
||||
|
||||
r = nfc_hci_execute_cmd(hdev, NFC_HCI_ADMIN_PIPE,
|
||||
NFC_HCI_ADM_CLEAR_ALL_PIPE, param, 2, NULL);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int nfc_hci_disconnect_gate(struct nfc_hci_dev *hdev, u8 gate)
|
||||
{
|
||||
int r;
|
||||
u8 pipe = hdev->gate2pipe[gate];
|
||||
|
||||
pr_debug("\n");
|
||||
|
||||
if (pipe == NFC_HCI_INVALID_PIPE)
|
||||
return -EADDRNOTAVAIL;
|
||||
|
||||
r = nfc_hci_close_pipe(hdev, pipe);
|
||||
if (r < 0)
|
||||
return r;
|
||||
|
||||
if (pipe != NFC_HCI_LINK_MGMT_PIPE && pipe != NFC_HCI_ADMIN_PIPE) {
|
||||
r = nfc_hci_delete_pipe(hdev, pipe);
|
||||
if (r < 0)
|
||||
return r;
|
||||
}
|
||||
|
||||
hdev->gate2pipe[gate] = NFC_HCI_INVALID_PIPE;
|
||||
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL(nfc_hci_disconnect_gate);
|
||||
|
||||
int nfc_hci_disconnect_all_gates(struct nfc_hci_dev *hdev)
|
||||
{
|
||||
int r;
|
||||
|
||||
pr_debug("\n");
|
||||
|
||||
r = nfc_hci_clear_all_pipes(hdev);
|
||||
if (r < 0)
|
||||
return r;
|
||||
|
||||
memset(hdev->gate2pipe, NFC_HCI_INVALID_PIPE, sizeof(hdev->gate2pipe));
|
||||
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL(nfc_hci_disconnect_all_gates);
|
||||
|
||||
int nfc_hci_connect_gate(struct nfc_hci_dev *hdev, u8 dest_host, u8 dest_gate)
|
||||
{
|
||||
u8 pipe = NFC_HCI_INVALID_PIPE;
|
||||
bool pipe_created = false;
|
||||
int r;
|
||||
|
||||
pr_debug("\n");
|
||||
|
||||
if (hdev->gate2pipe[dest_gate] != NFC_HCI_INVALID_PIPE)
|
||||
return -EADDRINUSE;
|
||||
|
||||
switch (dest_gate) {
|
||||
case NFC_HCI_LINK_MGMT_GATE:
|
||||
pipe = NFC_HCI_LINK_MGMT_PIPE;
|
||||
break;
|
||||
case NFC_HCI_ADMIN_GATE:
|
||||
pipe = NFC_HCI_ADMIN_PIPE;
|
||||
break;
|
||||
default:
|
||||
pipe = nfc_hci_create_pipe(hdev, dest_host, dest_gate, &r);
|
||||
if (pipe == NFC_HCI_INVALID_PIPE)
|
||||
return r;
|
||||
pipe_created = true;
|
||||
break;
|
||||
}
|
||||
|
||||
r = nfc_hci_open_pipe(hdev, pipe);
|
||||
if (r < 0) {
|
||||
if (pipe_created)
|
||||
if (nfc_hci_delete_pipe(hdev, pipe) < 0) {
|
||||
/* TODO: Cannot clean by deleting pipe...
|
||||
* -> inconsistent state */
|
||||
}
|
||||
return r;
|
||||
}
|
||||
|
||||
hdev->gate2pipe[dest_gate] = pipe;
|
||||
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL(nfc_hci_connect_gate);
|
||||
File diff suppressed because it is too large
Load Diff
@@ -0,0 +1,139 @@
|
||||
/*
|
||||
* Copyright (C) 2012 Intel Corporation. All rights reserved.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the
|
||||
* Free Software Foundation, Inc.,
|
||||
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
||||
*/
|
||||
|
||||
#ifndef __LOCAL_HCI_H
|
||||
#define __LOCAL_HCI_H
|
||||
|
||||
struct gate_pipe_map {
|
||||
u8 gate;
|
||||
u8 pipe;
|
||||
};
|
||||
|
||||
struct hcp_message {
|
||||
u8 header; /* type -cmd,evt,rsp- + instruction */
|
||||
u8 data[];
|
||||
} __packed;
|
||||
|
||||
struct hcp_packet {
|
||||
u8 header; /* cbit+pipe */
|
||||
struct hcp_message message;
|
||||
} __packed;
|
||||
|
||||
/*
|
||||
* HCI command execution completion callback.
|
||||
* result will be one of the HCI response codes.
|
||||
* skb contains the response data and must be disposed.
|
||||
*/
|
||||
typedef void (*hci_cmd_cb_t) (struct nfc_hci_dev *hdev, u8 result,
|
||||
struct sk_buff *skb, void *cb_data);
|
||||
|
||||
struct hcp_exec_waiter {
|
||||
wait_queue_head_t *wq;
|
||||
bool exec_complete;
|
||||
int exec_result;
|
||||
struct sk_buff *result_skb;
|
||||
};
|
||||
|
||||
struct hci_msg {
|
||||
struct list_head msg_l;
|
||||
struct sk_buff_head msg_frags;
|
||||
bool wait_response;
|
||||
hci_cmd_cb_t cb;
|
||||
void *cb_context;
|
||||
unsigned long completion_delay;
|
||||
};
|
||||
|
||||
struct hci_create_pipe_params {
|
||||
u8 src_gate;
|
||||
u8 dest_host;
|
||||
u8 dest_gate;
|
||||
} __packed;
|
||||
|
||||
struct hci_create_pipe_resp {
|
||||
u8 src_host;
|
||||
u8 src_gate;
|
||||
u8 dest_host;
|
||||
u8 dest_gate;
|
||||
u8 pipe;
|
||||
} __packed;
|
||||
|
||||
#define NFC_HCI_FRAGMENT 0x7f
|
||||
|
||||
#define HCP_HEADER(type, instr) ((((type) & 0x03) << 6) | ((instr) & 0x3f))
|
||||
#define HCP_MSG_GET_TYPE(header) ((header & 0xc0) >> 6)
|
||||
#define HCP_MSG_GET_CMD(header) (header & 0x3f)
|
||||
|
||||
int nfc_hci_hcp_message_tx(struct nfc_hci_dev *hdev, u8 pipe,
|
||||
u8 type, u8 instruction,
|
||||
const u8 *payload, size_t payload_len,
|
||||
hci_cmd_cb_t cb, void *cb_data,
|
||||
unsigned long completion_delay);
|
||||
|
||||
u8 nfc_hci_pipe2gate(struct nfc_hci_dev *hdev, u8 pipe);
|
||||
|
||||
void nfc_hci_hcp_message_rx(struct nfc_hci_dev *hdev, u8 pipe, u8 type,
|
||||
u8 instruction, struct sk_buff *skb);
|
||||
|
||||
/* HCP headers */
|
||||
#define NFC_HCI_HCP_PACKET_HEADER_LEN 1
|
||||
#define NFC_HCI_HCP_MESSAGE_HEADER_LEN 1
|
||||
#define NFC_HCI_HCP_HEADER_LEN 2
|
||||
|
||||
/* HCP types */
|
||||
#define NFC_HCI_HCP_COMMAND 0x00
|
||||
#define NFC_HCI_HCP_EVENT 0x01
|
||||
#define NFC_HCI_HCP_RESPONSE 0x02
|
||||
|
||||
/* Generic commands */
|
||||
#define NFC_HCI_ANY_SET_PARAMETER 0x01
|
||||
#define NFC_HCI_ANY_GET_PARAMETER 0x02
|
||||
#define NFC_HCI_ANY_OPEN_PIPE 0x03
|
||||
#define NFC_HCI_ANY_CLOSE_PIPE 0x04
|
||||
|
||||
/* Reader RF commands */
|
||||
#define NFC_HCI_WR_XCHG_DATA 0x10
|
||||
|
||||
/* Admin commands */
|
||||
#define NFC_HCI_ADM_CREATE_PIPE 0x10
|
||||
#define NFC_HCI_ADM_DELETE_PIPE 0x11
|
||||
#define NFC_HCI_ADM_NOTIFY_PIPE_CREATED 0x12
|
||||
#define NFC_HCI_ADM_NOTIFY_PIPE_DELETED 0x13
|
||||
#define NFC_HCI_ADM_CLEAR_ALL_PIPE 0x14
|
||||
#define NFC_HCI_ADM_NOTIFY_ALL_PIPE_CLEARED 0x15
|
||||
|
||||
/* Generic responses */
|
||||
#define NFC_HCI_ANY_OK 0x00
|
||||
#define NFC_HCI_ANY_E_NOT_CONNECTED 0x01
|
||||
#define NFC_HCI_ANY_E_CMD_PAR_UNKNOWN 0x02
|
||||
#define NFC_HCI_ANY_E_NOK 0x03
|
||||
#define NFC_HCI_ANY_E_PIPES_FULL 0x04
|
||||
#define NFC_HCI_ANY_E_REG_PAR_UNKNOWN 0x05
|
||||
#define NFC_HCI_ANY_E_PIPE_NOT_OPENED 0x06
|
||||
#define NFC_HCI_ANY_E_CMD_NOT_SUPPORTED 0x07
|
||||
#define NFC_HCI_ANY_E_INHIBITED 0x08
|
||||
#define NFC_HCI_ANY_E_TIMEOUT 0x09
|
||||
#define NFC_HCI_ANY_E_REG_ACCESS_DENIED 0x0a
|
||||
#define NFC_HCI_ANY_E_PIPE_ACCESS_DENIED 0x0b
|
||||
|
||||
/* Pipes */
|
||||
#define NFC_HCI_INVALID_PIPE 0x80
|
||||
#define NFC_HCI_LINK_MGMT_PIPE 0x00
|
||||
#define NFC_HCI_ADMIN_PIPE 0x01
|
||||
|
||||
#endif /* __LOCAL_HCI_H */
|
||||
@@ -0,0 +1,156 @@
|
||||
/*
|
||||
* Copyright (C) 2012 Intel Corporation. All rights reserved.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the
|
||||
* Free Software Foundation, Inc.,
|
||||
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
||||
*/
|
||||
|
||||
#define pr_fmt(fmt) "hci: %s: " fmt, __func__
|
||||
|
||||
#include <linux/init.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/module.h>
|
||||
|
||||
#include <net/nfc/hci.h>
|
||||
|
||||
#include "hci.h"
|
||||
|
||||
/*
|
||||
* Payload is the HCP message data only. Instruction will be prepended.
|
||||
* Guarantees that cb will be called upon completion or timeout delay
|
||||
* counted from the moment the cmd is sent to the transport.
|
||||
*/
|
||||
int nfc_hci_hcp_message_tx(struct nfc_hci_dev *hdev, u8 pipe,
|
||||
u8 type, u8 instruction,
|
||||
const u8 *payload, size_t payload_len,
|
||||
hci_cmd_cb_t cb, void *cb_data,
|
||||
unsigned long completion_delay)
|
||||
{
|
||||
struct nfc_dev *ndev = hdev->ndev;
|
||||
struct hci_msg *cmd;
|
||||
const u8 *ptr = payload;
|
||||
int hci_len, err;
|
||||
bool firstfrag = true;
|
||||
|
||||
cmd = kzalloc(sizeof(struct hci_msg), GFP_KERNEL);
|
||||
if (cmd == NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
INIT_LIST_HEAD(&cmd->msg_l);
|
||||
skb_queue_head_init(&cmd->msg_frags);
|
||||
cmd->wait_response = (type == NFC_HCI_HCP_COMMAND) ? true : false;
|
||||
cmd->cb = cb;
|
||||
cmd->cb_context = cb_data;
|
||||
cmd->completion_delay = completion_delay;
|
||||
|
||||
hci_len = payload_len + 1;
|
||||
while (hci_len > 0) {
|
||||
struct sk_buff *skb;
|
||||
int skb_len, data_link_len;
|
||||
struct hcp_packet *packet;
|
||||
|
||||
if (NFC_HCI_HCP_PACKET_HEADER_LEN + hci_len <=
|
||||
hdev->max_data_link_payload)
|
||||
data_link_len = hci_len;
|
||||
else
|
||||
data_link_len = hdev->max_data_link_payload -
|
||||
NFC_HCI_HCP_PACKET_HEADER_LEN;
|
||||
|
||||
skb_len = ndev->tx_headroom + NFC_HCI_HCP_PACKET_HEADER_LEN +
|
||||
data_link_len + ndev->tx_tailroom;
|
||||
hci_len -= data_link_len;
|
||||
|
||||
skb = alloc_skb(skb_len, GFP_KERNEL);
|
||||
if (skb == NULL) {
|
||||
err = -ENOMEM;
|
||||
goto out_skb_err;
|
||||
}
|
||||
skb_reserve(skb, ndev->tx_headroom);
|
||||
|
||||
skb_put(skb, NFC_HCI_HCP_PACKET_HEADER_LEN + data_link_len);
|
||||
|
||||
/* Only the last fragment will have the cb bit set to 1 */
|
||||
packet = (struct hcp_packet *)skb->data;
|
||||
packet->header = pipe;
|
||||
if (firstfrag) {
|
||||
firstfrag = false;
|
||||
packet->message.header = HCP_HEADER(type, instruction);
|
||||
if (ptr) {
|
||||
memcpy(packet->message.data, ptr,
|
||||
data_link_len - 1);
|
||||
ptr += data_link_len - 1;
|
||||
}
|
||||
} else {
|
||||
memcpy(&packet->message, ptr, data_link_len);
|
||||
ptr += data_link_len;
|
||||
}
|
||||
|
||||
/* This is the last fragment, set the cb bit */
|
||||
if (hci_len == 0)
|
||||
packet->header |= ~NFC_HCI_FRAGMENT;
|
||||
|
||||
skb_queue_tail(&cmd->msg_frags, skb);
|
||||
}
|
||||
|
||||
mutex_lock(&hdev->msg_tx_mutex);
|
||||
list_add_tail(&hdev->msg_tx_queue, &cmd->msg_l);
|
||||
mutex_unlock(&hdev->msg_tx_mutex);
|
||||
|
||||
queue_work(hdev->msg_tx_wq, &hdev->msg_tx_work);
|
||||
|
||||
return 0;
|
||||
|
||||
out_skb_err:
|
||||
skb_queue_purge(&cmd->msg_frags);
|
||||
kfree(cmd);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
u8 nfc_hci_pipe2gate(struct nfc_hci_dev *hdev, u8 pipe)
|
||||
{
|
||||
int gate;
|
||||
|
||||
for (gate = 0; gate < NFC_HCI_MAX_GATES; gate++)
|
||||
if (hdev->gate2pipe[gate] == pipe)
|
||||
return gate;
|
||||
|
||||
return 0xff;
|
||||
}
|
||||
|
||||
/*
|
||||
* Receive hcp message for pipe, with type and cmd.
|
||||
* skb contains optional message data only.
|
||||
*/
|
||||
void nfc_hci_hcp_message_rx(struct nfc_hci_dev *hdev, u8 pipe, u8 type,
|
||||
u8 instruction, struct sk_buff *skb)
|
||||
{
|
||||
switch (type) {
|
||||
case NFC_HCI_HCP_RESPONSE:
|
||||
nfc_hci_resp_received(hdev, instruction, skb);
|
||||
break;
|
||||
case NFC_HCI_HCP_COMMAND:
|
||||
nfc_hci_cmd_received(hdev, pipe, instruction, skb);
|
||||
break;
|
||||
case NFC_HCI_HCP_EVENT:
|
||||
nfc_hci_event_received(hdev, pipe, instruction, skb);
|
||||
break;
|
||||
default:
|
||||
pr_err("UNKNOWN MSG Type %d, instruction=%d\n",
|
||||
type, instruction);
|
||||
kfree_skb(skb);
|
||||
break;
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user