1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright (C) 2014 STMicroelectronics SAS. All rights reserved.
6 #ifndef __LOCAL_ST21NFCA_H_
7 #define __LOCAL_ST21NFCA_H_
9 #include <net/nfc/hci.h>
10 #include <linux/skbuff.h>
11 #include <linux/workqueue.h>
15 /* framing in HCI mode */
16 #define ST21NFCA_SOF_EOF_LEN 2
18 /* Almost every time value is 0 */
19 #define ST21NFCA_HCI_LLC_LEN 1
21 /* Size in worst case :
22 * In normal case CRC len = 2 but byte stuffing
23 * may appear in case one CRC byte = ST21NFCA_SOF_EOF
25 #define ST21NFCA_HCI_LLC_CRC 4
27 #define ST21NFCA_HCI_LLC_LEN_CRC (ST21NFCA_SOF_EOF_LEN + \
28 ST21NFCA_HCI_LLC_LEN + \
30 #define ST21NFCA_HCI_LLC_MIN_SIZE (1 + ST21NFCA_HCI_LLC_LEN_CRC)
32 /* Worst case when adding byte stuffing between each byte */
33 #define ST21NFCA_HCI_LLC_MAX_PAYLOAD 29
34 #define ST21NFCA_HCI_LLC_MAX_SIZE (ST21NFCA_HCI_LLC_LEN_CRC + 1 + \
35 ST21NFCA_HCI_LLC_MAX_PAYLOAD)
37 /* Reader RF commands */
38 #define ST21NFCA_WR_XCHG_DATA 0x10
40 #define ST21NFCA_DEVICE_MGNT_GATE 0x01
41 #define ST21NFCA_RF_READER_F_GATE 0x14
42 #define ST21NFCA_RF_CARD_F_GATE 0x24
43 #define ST21NFCA_APDU_READER_GATE 0xf0
44 #define ST21NFCA_CONNECTIVITY_GATE 0x41
47 * ref ISO7816-3 chap 8.1. the initial character TS is followed by a
48 * sequence of at most 32 characters.
50 #define ST21NFCA_ESE_MAX_LENGTH 33
51 #define ST21NFCA_ESE_HOST_ID 0xc0
53 #define DRIVER_DESC "HCI NFC driver for ST21NFCA"
55 #define ST21NFCA_HCI_MODE 0
56 #define ST21NFCA_NUM_DEVICES 256
58 #define ST21NFCA_VENDOR_OUI 0x0080E1 /* STMicroelectronics */
59 #define ST21NFCA_FACTORY_MODE 2
61 struct st21nfca_se_status {
72 * enum nfc_vendor_cmds - supported nfc vendor commands
74 * @FACTORY_MODE: Allow to set the driver into a mode where no secure element
75 * are activated. It does not consider any NFC_ATTR_VENDOR_DATA.
76 * @HCI_CLEAR_ALL_PIPES: Allow to execute a HCI clear all pipes command.
77 * It does not consider any NFC_ATTR_VENDOR_DATA.
78 * @HCI_DM_PUT_DATA: Allow to configure specific CLF registry as for example
79 * RF trimmings or low level drivers configurations (I2C, SPI, SWP).
80 * @HCI_DM_UPDATE_AID: Allow to configure an AID routing into the CLF routing
81 * table following RF technology, CLF mode or protocol.
82 * @HCI_DM_GET_INFO: Allow to retrieve CLF information.
83 * @HCI_DM_GET_DATA: Allow to retrieve CLF configurable data such as low
84 * level drivers configurations or RF trimmings.
85 * @HCI_DM_LOAD: Allow to load a firmware into the CLF. A complete
86 * packet can be more than 8KB.
87 * @HCI_DM_RESET: Allow to run a CLF reset in order to "commit" CLF
88 * configuration changes without CLF power off.
89 * @HCI_GET_PARAM: Allow to retrieve an HCI CLF parameter (for example the
91 * @HCI_DM_FIELD_GENERATOR: Allow to generate different kind of RF
92 * technology. When using this command to anti-collision is done.
93 * @HCI_LOOPBACK: Allow to echo a command and test the Dh to CLF
96 enum nfc_vendor_cmds {
106 HCI_DM_FIELD_GENERATOR,
110 struct st21nfca_vendor_info {
111 struct completion req_completion;
112 struct sk_buff *rx_skb;
115 struct st21nfca_dep_info {
116 struct sk_buff *tx_pending;
117 struct work_struct tx_work;
127 struct st21nfca_se_info {
128 u8 atr[ST21NFCA_ESE_MAX_LENGTH];
129 struct completion req_completion;
131 struct timer_list bwi_timer;
132 int wt_timeout; /* in msecs */
135 struct timer_list se_active_timer;
146 struct st21nfca_hci_info {
147 const struct nfc_phy_ops *phy_ops;
150 struct nfc_hci_dev *hdev;
151 struct st21nfca_se_status *se_status;
153 enum st21nfca_state state;
155 struct mutex info_lock;
158 data_exchange_cb_t async_cb;
159 void *async_cb_context;
161 struct st21nfca_dep_info dep_info;
162 struct st21nfca_se_info se_info;
163 struct st21nfca_vendor_info vendor_info;
166 int st21nfca_hci_probe(void *phy_id, const struct nfc_phy_ops *phy_ops,
167 char *llc_name, int phy_headroom, int phy_tailroom,
168 int phy_payload, struct nfc_hci_dev **hdev,
169 struct st21nfca_se_status *se_status);
170 void st21nfca_hci_remove(struct nfc_hci_dev *hdev);
172 int st21nfca_dep_event_received(struct nfc_hci_dev *hdev,
173 u8 event, struct sk_buff *skb);
174 int st21nfca_tm_send_dep_res(struct nfc_hci_dev *hdev, struct sk_buff *skb);
176 int st21nfca_im_send_atr_req(struct nfc_hci_dev *hdev, u8 *gb, size_t gb_len);
177 int st21nfca_im_send_dep_req(struct nfc_hci_dev *hdev, struct sk_buff *skb);
178 void st21nfca_dep_init(struct nfc_hci_dev *hdev);
179 void st21nfca_dep_deinit(struct nfc_hci_dev *hdev);
181 int st21nfca_connectivity_event_received(struct nfc_hci_dev *hdev, u8 host,
182 u8 event, struct sk_buff *skb);
183 int st21nfca_apdu_reader_event_received(struct nfc_hci_dev *hdev,
184 u8 event, struct sk_buff *skb);
186 int st21nfca_hci_discover_se(struct nfc_hci_dev *hdev);
187 int st21nfca_hci_enable_se(struct nfc_hci_dev *hdev, u32 se_idx);
188 int st21nfca_hci_disable_se(struct nfc_hci_dev *hdev, u32 se_idx);
189 int st21nfca_hci_se_io(struct nfc_hci_dev *hdev, u32 se_idx,
190 u8 *apdu, size_t apdu_length,
191 se_io_cb_t cb, void *cb_context);
193 void st21nfca_se_init(struct nfc_hci_dev *hdev);
194 void st21nfca_se_deinit(struct nfc_hci_dev *hdev);
196 int st21nfca_hci_loopback_event_received(struct nfc_hci_dev *ndev, u8 event,
197 struct sk_buff *skb);
198 int st21nfca_vendor_cmds_init(struct nfc_hci_dev *ndev);
200 #endif /* __LOCAL_ST21NFCA_H_ */