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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 | /* * The NFC Controller Interface is the communication protocol between an * NFC Controller (NFCC) and a Device Host (DH). * * Copyright (C) 2011 Texas Instruments, Inc. * * Written by Ilan Elias <ilane@ti.com> * * Acknowledgements: * This file is based on hci_event.c, which was written * by Maxim Krasnyansky. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 * as published by the Free Software Foundation * * 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 * */ #include <linux/types.h> #include <linux/interrupt.h> #include <linux/bitops.h> #include <linux/skbuff.h> #include "../nfc.h" #include <net/nfc/nci.h> #include <net/nfc/nci_core.h> /* Handle NCI Response packets */ static void nci_core_reset_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb) { struct nci_core_reset_rsp *rsp = (void *) skb->data; nfc_dbg("entry, status 0x%x", rsp->status); if (rsp->status == NCI_STATUS_OK) ndev->nci_ver = rsp->nci_ver; nfc_dbg("nci_ver 0x%x", ndev->nci_ver); nci_req_complete(ndev, rsp->status); } static void nci_core_init_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb) { struct nci_core_init_rsp_1 *rsp_1 = (void *) skb->data; struct nci_core_init_rsp_2 *rsp_2; nfc_dbg("entry, status 0x%x", rsp_1->status); if (rsp_1->status != NCI_STATUS_OK) return; ndev->nfcc_features = __le32_to_cpu(rsp_1->nfcc_features); ndev->num_supported_rf_interfaces = rsp_1->num_supported_rf_interfaces; if (ndev->num_supported_rf_interfaces > NCI_MAX_SUPPORTED_RF_INTERFACES) { ndev->num_supported_rf_interfaces = NCI_MAX_SUPPORTED_RF_INTERFACES; } memcpy(ndev->supported_rf_interfaces, rsp_1->supported_rf_interfaces, ndev->num_supported_rf_interfaces); rsp_2 = (void *) (skb->data + 6 + ndev->num_supported_rf_interfaces); ndev->max_logical_connections = rsp_2->max_logical_connections; ndev->max_routing_table_size = __le16_to_cpu(rsp_2->max_routing_table_size); ndev->max_control_packet_payload_length = rsp_2->max_control_packet_payload_length; ndev->rf_sending_buffer_size = __le16_to_cpu(rsp_2->rf_sending_buffer_size); ndev->rf_receiving_buffer_size = __le16_to_cpu(rsp_2->rf_receiving_buffer_size); ndev->manufacturer_id = __le16_to_cpu(rsp_2->manufacturer_id); nfc_dbg("nfcc_features 0x%x", ndev->nfcc_features); nfc_dbg("num_supported_rf_interfaces %d", ndev->num_supported_rf_interfaces); nfc_dbg("supported_rf_interfaces[0] 0x%x", ndev->supported_rf_interfaces[0]); nfc_dbg("supported_rf_interfaces[1] 0x%x", ndev->supported_rf_interfaces[1]); nfc_dbg("supported_rf_interfaces[2] 0x%x", ndev->supported_rf_interfaces[2]); nfc_dbg("supported_rf_interfaces[3] 0x%x", ndev->supported_rf_interfaces[3]); nfc_dbg("max_logical_connections %d", ndev->max_logical_connections); nfc_dbg("max_routing_table_size %d", ndev->max_routing_table_size); nfc_dbg("max_control_packet_payload_length %d", ndev->max_control_packet_payload_length); nfc_dbg("rf_sending_buffer_size %d", ndev->rf_sending_buffer_size); nfc_dbg("rf_receiving_buffer_size %d", ndev->rf_receiving_buffer_size); nfc_dbg("manufacturer_id 0x%x", ndev->manufacturer_id); nci_req_complete(ndev, rsp_1->status); } static void nci_core_conn_create_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb) { struct nci_core_conn_create_rsp *rsp = (void *) skb->data; nfc_dbg("entry, status 0x%x", rsp->status); if (rsp->status != NCI_STATUS_OK) return; ndev->max_pkt_payload_size = rsp->max_pkt_payload_size; ndev->initial_num_credits = rsp->initial_num_credits; ndev->conn_id = rsp->conn_id; atomic_set(&ndev->credits_cnt, ndev->initial_num_credits); nfc_dbg("max_pkt_payload_size %d", ndev->max_pkt_payload_size); nfc_dbg("initial_num_credits %d", ndev->initial_num_credits); nfc_dbg("conn_id %d", ndev->conn_id); } static void nci_rf_disc_map_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb) { __u8 status = skb->data[0]; nfc_dbg("entry, status 0x%x", status); nci_req_complete(ndev, status); } static void nci_rf_disc_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb) { __u8 status = skb->data[0]; nfc_dbg("entry, status 0x%x", status); if (status == NCI_STATUS_OK) set_bit(NCI_DISCOVERY, &ndev->flags); nci_req_complete(ndev, status); } static void nci_rf_deactivate_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb) { __u8 status = skb->data[0]; nfc_dbg("entry, status 0x%x", status); clear_bit(NCI_DISCOVERY, &ndev->flags); nci_req_complete(ndev, status); } void nci_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb) { __u16 rsp_opcode = nci_opcode(skb->data); /* we got a rsp, stop the cmd timer */ del_timer(&ndev->cmd_timer); nfc_dbg("NCI RX: MT=rsp, PBF=%d, GID=0x%x, OID=0x%x, plen=%d", nci_pbf(skb->data), nci_opcode_gid(rsp_opcode), nci_opcode_oid(rsp_opcode), nci_plen(skb->data)); /* strip the nci control header */ skb_pull(skb, NCI_CTRL_HDR_SIZE); switch (rsp_opcode) { case NCI_OP_CORE_RESET_RSP: nci_core_reset_rsp_packet(ndev, skb); break; case NCI_OP_CORE_INIT_RSP: nci_core_init_rsp_packet(ndev, skb); break; case NCI_OP_CORE_CONN_CREATE_RSP: nci_core_conn_create_rsp_packet(ndev, skb); break; case NCI_OP_RF_DISCOVER_MAP_RSP: nci_rf_disc_map_rsp_packet(ndev, skb); break; case NCI_OP_RF_DISCOVER_RSP: nci_rf_disc_rsp_packet(ndev, skb); break; case NCI_OP_RF_DEACTIVATE_RSP: nci_rf_deactivate_rsp_packet(ndev, skb); break; default: nfc_err("unknown rsp opcode 0x%x", rsp_opcode); break; } kfree_skb(skb); /* trigger the next cmd */ atomic_set(&ndev->cmd_cnt, 1); if (!skb_queue_empty(&ndev->cmd_q)) queue_work(ndev->cmd_wq, &ndev->cmd_work); } |