2 * The NFC Controller Interface is the communication protocol between an
3 * NFC Controller (NFCC) and a Device Host (DH).
5 * Copyright (C) 2011 Texas Instruments, Inc.
7 * Written by Ilan Elias <ilane@ti.com>
10 * This file is based on hci_event.c, which was written
11 * by Maxim Krasnyansky.
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
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.
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
28 #include <linux/types.h>
29 #include <linux/interrupt.h>
30 #include <linux/bitops.h>
31 #include <linux/skbuff.h>
34 #include <net/nfc/nci.h>
35 #include <net/nfc/nci_core.h>
37 /* Handle NCI Response packets */
39 static void nci_core_reset_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb)
41 struct nci_core_reset_rsp *rsp = (void *) skb->data;
43 nfc_dbg("entry, status 0x%x", rsp->status);
45 if (rsp->status == NCI_STATUS_OK)
46 ndev->nci_ver = rsp->nci_ver;
48 nfc_dbg("nci_ver 0x%x", ndev->nci_ver);
50 nci_req_complete(ndev, rsp->status);
53 static void nci_core_init_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb)
55 struct nci_core_init_rsp_1 *rsp_1 = (void *) skb->data;
56 struct nci_core_init_rsp_2 *rsp_2;
58 nfc_dbg("entry, status 0x%x", rsp_1->status);
60 if (rsp_1->status != NCI_STATUS_OK)
63 ndev->nfcc_features = __le32_to_cpu(rsp_1->nfcc_features);
64 ndev->num_supported_rf_interfaces = rsp_1->num_supported_rf_interfaces;
66 if (ndev->num_supported_rf_interfaces >
67 NCI_MAX_SUPPORTED_RF_INTERFACES) {
68 ndev->num_supported_rf_interfaces =
69 NCI_MAX_SUPPORTED_RF_INTERFACES;
72 memcpy(ndev->supported_rf_interfaces,
73 rsp_1->supported_rf_interfaces,
74 ndev->num_supported_rf_interfaces);
76 rsp_2 = (void *) (skb->data + 6 + ndev->num_supported_rf_interfaces);
78 ndev->max_logical_connections =
79 rsp_2->max_logical_connections;
80 ndev->max_routing_table_size =
81 __le16_to_cpu(rsp_2->max_routing_table_size);
82 ndev->max_control_packet_payload_length =
83 rsp_2->max_control_packet_payload_length;
84 ndev->rf_sending_buffer_size =
85 __le16_to_cpu(rsp_2->rf_sending_buffer_size);
86 ndev->rf_receiving_buffer_size =
87 __le16_to_cpu(rsp_2->rf_receiving_buffer_size);
88 ndev->manufacturer_id =
89 __le16_to_cpu(rsp_2->manufacturer_id);
91 nfc_dbg("nfcc_features 0x%x",
93 nfc_dbg("num_supported_rf_interfaces %d",
94 ndev->num_supported_rf_interfaces);
95 nfc_dbg("supported_rf_interfaces[0] 0x%x",
96 ndev->supported_rf_interfaces[0]);
97 nfc_dbg("supported_rf_interfaces[1] 0x%x",
98 ndev->supported_rf_interfaces[1]);
99 nfc_dbg("supported_rf_interfaces[2] 0x%x",
100 ndev->supported_rf_interfaces[2]);
101 nfc_dbg("supported_rf_interfaces[3] 0x%x",
102 ndev->supported_rf_interfaces[3]);
103 nfc_dbg("max_logical_connections %d",
104 ndev->max_logical_connections);
105 nfc_dbg("max_routing_table_size %d",
106 ndev->max_routing_table_size);
107 nfc_dbg("max_control_packet_payload_length %d",
108 ndev->max_control_packet_payload_length);
109 nfc_dbg("rf_sending_buffer_size %d",
110 ndev->rf_sending_buffer_size);
111 nfc_dbg("rf_receiving_buffer_size %d",
112 ndev->rf_receiving_buffer_size);
113 nfc_dbg("manufacturer_id 0x%x",
114 ndev->manufacturer_id);
116 nci_req_complete(ndev, rsp_1->status);
119 static void nci_core_conn_create_rsp_packet(struct nci_dev *ndev,
122 struct nci_core_conn_create_rsp *rsp = (void *) skb->data;
124 nfc_dbg("entry, status 0x%x", rsp->status);
126 if (rsp->status != NCI_STATUS_OK)
129 ndev->max_pkt_payload_size = rsp->max_pkt_payload_size;
130 ndev->initial_num_credits = rsp->initial_num_credits;
131 ndev->conn_id = rsp->conn_id;
133 atomic_set(&ndev->credits_cnt, ndev->initial_num_credits);
135 nfc_dbg("max_pkt_payload_size %d", ndev->max_pkt_payload_size);
136 nfc_dbg("initial_num_credits %d", ndev->initial_num_credits);
137 nfc_dbg("conn_id %d", ndev->conn_id);
140 static void nci_rf_disc_map_rsp_packet(struct nci_dev *ndev,
143 __u8 status = skb->data[0];
145 nfc_dbg("entry, status 0x%x", status);
147 nci_req_complete(ndev, status);
150 static void nci_rf_disc_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb)
152 __u8 status = skb->data[0];
154 nfc_dbg("entry, status 0x%x", status);
156 if (status == NCI_STATUS_OK)
157 set_bit(NCI_DISCOVERY, &ndev->flags);
159 nci_req_complete(ndev, status);
162 static void nci_rf_deactivate_rsp_packet(struct nci_dev *ndev,
165 __u8 status = skb->data[0];
167 nfc_dbg("entry, status 0x%x", status);
169 clear_bit(NCI_DISCOVERY, &ndev->flags);
171 nci_req_complete(ndev, status);
174 void nci_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb)
176 __u16 rsp_opcode = nci_opcode(skb->data);
178 /* we got a rsp, stop the cmd timer */
179 del_timer(&ndev->cmd_timer);
181 nfc_dbg("NCI RX: MT=rsp, PBF=%d, GID=0x%x, OID=0x%x, plen=%d",
183 nci_opcode_gid(rsp_opcode),
184 nci_opcode_oid(rsp_opcode),
185 nci_plen(skb->data));
187 /* strip the nci control header */
188 skb_pull(skb, NCI_CTRL_HDR_SIZE);
190 switch (rsp_opcode) {
191 case NCI_OP_CORE_RESET_RSP:
192 nci_core_reset_rsp_packet(ndev, skb);
195 case NCI_OP_CORE_INIT_RSP:
196 nci_core_init_rsp_packet(ndev, skb);
199 case NCI_OP_CORE_CONN_CREATE_RSP:
200 nci_core_conn_create_rsp_packet(ndev, skb);
203 case NCI_OP_RF_DISCOVER_MAP_RSP:
204 nci_rf_disc_map_rsp_packet(ndev, skb);
207 case NCI_OP_RF_DISCOVER_RSP:
208 nci_rf_disc_rsp_packet(ndev, skb);
211 case NCI_OP_RF_DEACTIVATE_RSP:
212 nci_rf_deactivate_rsp_packet(ndev, skb);
216 nfc_err("unknown rsp opcode 0x%x", rsp_opcode);
222 /* trigger the next cmd */
223 atomic_set(&ndev->cmd_cnt, 1);
224 if (!skb_queue_empty(&ndev->cmd_q))
225 queue_work(ndev->cmd_wq, &ndev->cmd_work);