Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 1 | /* |
| 2 | * The NFC Controller Interface is the communication protocol between an |
| 3 | * NFC Controller (NFCC) and a Device Host (DH). |
| 4 | * |
| 5 | * Copyright (C) 2011 Texas Instruments, Inc. |
| 6 | * |
| 7 | * Written by Ilan Elias <ilane@ti.com> |
| 8 | * |
| 9 | * Acknowledgements: |
| 10 | * This file is based on hci_core.h, which was written |
| 11 | * by Maxim Krasnyansky. |
| 12 | * |
| 13 | * This program is free software; you can redistribute it and/or modify |
| 14 | * it under the terms of the GNU General Public License version 2 |
| 15 | * as published by the Free Software Foundation |
| 16 | * |
| 17 | * This program is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | * GNU General Public License for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License |
| 23 | * along with this program; if not, write to the Free Software |
| 24 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 25 | * |
| 26 | */ |
| 27 | |
| 28 | #ifndef __NCI_CORE_H |
| 29 | #define __NCI_CORE_H |
| 30 | |
| 31 | #include <linux/interrupt.h> |
| 32 | #include <linux/skbuff.h> |
| 33 | |
| 34 | #include <net/nfc/nfc.h> |
| 35 | #include <net/nfc/nci.h> |
| 36 | |
Ilan Elias | 8939e47 | 2012-01-18 13:16:12 +0200 | [diff] [blame] | 37 | /* NCI device flags */ |
| 38 | enum nci_flag { |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 39 | NCI_INIT, |
| 40 | NCI_UP, |
Ilan Elias | 38f04c6 | 2011-09-22 11:36:19 +0300 | [diff] [blame] | 41 | NCI_DATA_EXCHANGE, |
Ilan Elias | c4bf98b | 2012-01-17 12:03:50 +0200 | [diff] [blame] | 42 | NCI_DATA_EXCHANGE_TO, |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 43 | }; |
| 44 | |
Ilan Elias | 8939e47 | 2012-01-18 13:16:12 +0200 | [diff] [blame] | 45 | /* NCI device states */ |
| 46 | enum nci_state { |
| 47 | NCI_IDLE, |
| 48 | NCI_DISCOVERY, |
Ilan Elias | 019c4fb | 2012-01-18 13:16:14 +0200 | [diff] [blame^] | 49 | NCI_W4_ALL_DISCOVERIES, |
| 50 | NCI_W4_HOST_SELECT, |
Ilan Elias | 8939e47 | 2012-01-18 13:16:12 +0200 | [diff] [blame] | 51 | NCI_POLL_ACTIVE, |
| 52 | }; |
| 53 | |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 54 | /* NCI timeouts */ |
| 55 | #define NCI_RESET_TIMEOUT 5000 |
| 56 | #define NCI_INIT_TIMEOUT 5000 |
| 57 | #define NCI_RF_DISC_TIMEOUT 5000 |
Ilan Elias | 019c4fb | 2012-01-18 13:16:14 +0200 | [diff] [blame^] | 58 | #define NCI_RF_DISC_SELECT_TIMEOUT 5000 |
Ilan Elias | 11ee515 | 2012-01-08 13:43:02 +0200 | [diff] [blame] | 59 | #define NCI_RF_DEACTIVATE_TIMEOUT 30000 |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 60 | #define NCI_CMD_TIMEOUT 5000 |
Ilan Elias | c4bf98b | 2012-01-17 12:03:50 +0200 | [diff] [blame] | 61 | #define NCI_DATA_TIMEOUT 700 |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 62 | |
| 63 | struct nci_dev; |
| 64 | |
| 65 | struct nci_ops { |
| 66 | int (*open)(struct nci_dev *ndev); |
| 67 | int (*close)(struct nci_dev *ndev); |
| 68 | int (*send)(struct sk_buff *skb); |
| 69 | }; |
| 70 | |
| 71 | #define NCI_MAX_SUPPORTED_RF_INTERFACES 4 |
Ilan Elias | 019c4fb | 2012-01-18 13:16:14 +0200 | [diff] [blame^] | 72 | #define NCI_MAX_DISCOVERED_TARGETS 10 |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 73 | |
| 74 | /* NCI Core structures */ |
| 75 | struct nci_dev { |
| 76 | struct nfc_dev *nfc_dev; |
| 77 | struct nci_ops *ops; |
| 78 | |
| 79 | int tx_headroom; |
| 80 | int tx_tailroom; |
| 81 | |
Ilan Elias | 8939e47 | 2012-01-18 13:16:12 +0200 | [diff] [blame] | 82 | atomic_t state; |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 83 | unsigned long flags; |
| 84 | |
| 85 | atomic_t cmd_cnt; |
| 86 | atomic_t credits_cnt; |
| 87 | |
| 88 | struct timer_list cmd_timer; |
Ilan Elias | c4bf98b | 2012-01-17 12:03:50 +0200 | [diff] [blame] | 89 | struct timer_list data_timer; |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 90 | |
| 91 | struct workqueue_struct *cmd_wq; |
| 92 | struct work_struct cmd_work; |
| 93 | |
| 94 | struct workqueue_struct *rx_wq; |
| 95 | struct work_struct rx_work; |
| 96 | |
| 97 | struct workqueue_struct *tx_wq; |
| 98 | struct work_struct tx_work; |
| 99 | |
| 100 | struct sk_buff_head cmd_q; |
| 101 | struct sk_buff_head rx_q; |
| 102 | struct sk_buff_head tx_q; |
| 103 | |
| 104 | struct mutex req_lock; |
| 105 | struct completion req_completion; |
| 106 | __u32 req_status; |
| 107 | __u32 req_result; |
| 108 | |
| 109 | void *driver_data; |
| 110 | |
| 111 | __u32 poll_prots; |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 112 | __u32 target_active_prot; |
| 113 | |
Ilan Elias | 019c4fb | 2012-01-18 13:16:14 +0200 | [diff] [blame^] | 114 | struct nfc_target targets[NCI_MAX_DISCOVERED_TARGETS]; |
| 115 | int n_targets; |
| 116 | |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 117 | /* received during NCI_OP_CORE_RESET_RSP */ |
| 118 | __u8 nci_ver; |
| 119 | |
| 120 | /* received during NCI_OP_CORE_INIT_RSP */ |
| 121 | __u32 nfcc_features; |
| 122 | __u8 num_supported_rf_interfaces; |
| 123 | __u8 supported_rf_interfaces |
| 124 | [NCI_MAX_SUPPORTED_RF_INTERFACES]; |
| 125 | __u8 max_logical_connections; |
| 126 | __u16 max_routing_table_size; |
Ilan Elias | e8c0dac | 2011-11-09 12:09:14 +0200 | [diff] [blame] | 127 | __u8 max_ctrl_pkt_payload_len; |
| 128 | __u16 max_size_for_large_params; |
Ilan Elias | e8c0dac | 2011-11-09 12:09:14 +0200 | [diff] [blame] | 129 | __u8 manufact_id; |
| 130 | __u32 manufact_specific_info; |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 131 | |
Ilan Elias | 637d85a | 2011-12-20 16:57:40 +0200 | [diff] [blame] | 132 | /* received during NCI_OP_RF_INTF_ACTIVATED_NTF */ |
| 133 | __u8 max_data_pkt_payload_size; |
| 134 | __u8 initial_num_credits; |
| 135 | |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 136 | /* stored during nci_data_exchange */ |
| 137 | data_exchange_cb_t data_exchange_cb; |
| 138 | void *data_exchange_cb_context; |
| 139 | struct sk_buff *rx_data_reassembly; |
| 140 | }; |
| 141 | |
| 142 | /* ----- NCI Devices ----- */ |
| 143 | struct nci_dev *nci_allocate_device(struct nci_ops *ops, |
| 144 | __u32 supported_protocols, |
| 145 | int tx_headroom, |
| 146 | int tx_tailroom); |
| 147 | void nci_free_device(struct nci_dev *ndev); |
| 148 | int nci_register_device(struct nci_dev *ndev); |
| 149 | void nci_unregister_device(struct nci_dev *ndev); |
| 150 | int nci_recv_frame(struct sk_buff *skb); |
| 151 | |
| 152 | static inline struct sk_buff *nci_skb_alloc(struct nci_dev *ndev, |
| 153 | unsigned int len, |
| 154 | gfp_t how) |
| 155 | { |
| 156 | struct sk_buff *skb; |
| 157 | |
| 158 | skb = alloc_skb(len + ndev->tx_headroom + ndev->tx_tailroom, how); |
| 159 | if (skb) |
| 160 | skb_reserve(skb, ndev->tx_headroom); |
| 161 | |
| 162 | return skb; |
| 163 | } |
| 164 | |
| 165 | static inline void nci_set_parent_dev(struct nci_dev *ndev, struct device *dev) |
| 166 | { |
| 167 | nfc_set_parent_dev(ndev->nfc_dev, dev); |
| 168 | } |
| 169 | |
| 170 | static inline void nci_set_drvdata(struct nci_dev *ndev, void *data) |
| 171 | { |
| 172 | ndev->driver_data = data; |
| 173 | } |
| 174 | |
| 175 | static inline void *nci_get_drvdata(struct nci_dev *ndev) |
| 176 | { |
| 177 | return ndev->driver_data; |
| 178 | } |
| 179 | |
| 180 | void nci_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb); |
| 181 | void nci_ntf_packet(struct nci_dev *ndev, struct sk_buff *skb); |
| 182 | void nci_rx_data_packet(struct nci_dev *ndev, struct sk_buff *skb); |
| 183 | int nci_send_cmd(struct nci_dev *ndev, __u16 opcode, __u8 plen, void *payload); |
| 184 | int nci_send_data(struct nci_dev *ndev, __u8 conn_id, struct sk_buff *skb); |
| 185 | void nci_data_exchange_complete(struct nci_dev *ndev, struct sk_buff *skb, |
| 186 | int err); |
Ilan Elias | 019c4fb | 2012-01-18 13:16:14 +0200 | [diff] [blame^] | 187 | void nci_clear_target_list(struct nci_dev *ndev); |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 188 | |
| 189 | /* ----- NCI requests ----- */ |
| 190 | #define NCI_REQ_DONE 0 |
| 191 | #define NCI_REQ_PEND 1 |
| 192 | #define NCI_REQ_CANCELED 2 |
| 193 | |
| 194 | void nci_req_complete(struct nci_dev *ndev, int result); |
| 195 | |
| 196 | /* ----- NCI status code ----- */ |
| 197 | int nci_to_errno(__u8 code); |
| 198 | |
| 199 | #endif /* __NCI_CORE_H */ |