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6a2968aa IE |
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_event.c, 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 | ||
52858b51 | 28 | #define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__ |
ed1e0ad8 | 29 | |
6a2968aa IE |
30 | #include <linux/types.h> |
31 | #include <linux/interrupt.h> | |
32 | #include <linux/bitops.h> | |
33 | #include <linux/skbuff.h> | |
34 | ||
35 | #include "../nfc.h" | |
36 | #include <net/nfc/nci.h> | |
37 | #include <net/nfc/nci_core.h> | |
38 | ||
39 | /* Handle NCI Response packets */ | |
40 | ||
41 | static void nci_core_reset_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb) | |
42 | { | |
43 | struct nci_core_reset_rsp *rsp = (void *) skb->data; | |
44 | ||
24bf3304 | 45 | pr_debug("status 0x%x\n", rsp->status); |
6a2968aa | 46 | |
e8c0dacd | 47 | if (rsp->status == NCI_STATUS_OK) { |
6a2968aa | 48 | ndev->nci_ver = rsp->nci_ver; |
20c239c1 JP |
49 | pr_debug("nci_ver 0x%x, config_status 0x%x\n", |
50 | rsp->nci_ver, rsp->config_status); | |
e8c0dacd | 51 | } |
6a2968aa IE |
52 | |
53 | nci_req_complete(ndev, rsp->status); | |
54 | } | |
55 | ||
56 | static void nci_core_init_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb) | |
57 | { | |
58 | struct nci_core_init_rsp_1 *rsp_1 = (void *) skb->data; | |
59 | struct nci_core_init_rsp_2 *rsp_2; | |
60 | ||
24bf3304 | 61 | pr_debug("status 0x%x\n", rsp_1->status); |
6a2968aa IE |
62 | |
63 | if (rsp_1->status != NCI_STATUS_OK) | |
e8c0dacd | 64 | goto exit; |
6a2968aa IE |
65 | |
66 | ndev->nfcc_features = __le32_to_cpu(rsp_1->nfcc_features); | |
67 | ndev->num_supported_rf_interfaces = rsp_1->num_supported_rf_interfaces; | |
68 | ||
69 | if (ndev->num_supported_rf_interfaces > | |
e8c0dacd | 70 | NCI_MAX_SUPPORTED_RF_INTERFACES) { |
6a2968aa IE |
71 | ndev->num_supported_rf_interfaces = |
72 | NCI_MAX_SUPPORTED_RF_INTERFACES; | |
73 | } | |
74 | ||
75 | memcpy(ndev->supported_rf_interfaces, | |
76 | rsp_1->supported_rf_interfaces, | |
77 | ndev->num_supported_rf_interfaces); | |
78 | ||
e8c0dacd | 79 | rsp_2 = (void *) (skb->data + 6 + rsp_1->num_supported_rf_interfaces); |
6a2968aa IE |
80 | |
81 | ndev->max_logical_connections = | |
82 | rsp_2->max_logical_connections; | |
83 | ndev->max_routing_table_size = | |
84 | __le16_to_cpu(rsp_2->max_routing_table_size); | |
e8c0dacd IE |
85 | ndev->max_ctrl_pkt_payload_len = |
86 | rsp_2->max_ctrl_pkt_payload_len; | |
87 | ndev->max_size_for_large_params = | |
88 | __le16_to_cpu(rsp_2->max_size_for_large_params); | |
e8c0dacd IE |
89 | ndev->manufact_id = |
90 | rsp_2->manufact_id; | |
91 | ndev->manufact_specific_info = | |
92 | __le32_to_cpu(rsp_2->manufact_specific_info); | |
93 | ||
20c239c1 JP |
94 | pr_debug("nfcc_features 0x%x\n", |
95 | ndev->nfcc_features); | |
96 | pr_debug("num_supported_rf_interfaces %d\n", | |
97 | ndev->num_supported_rf_interfaces); | |
98 | pr_debug("supported_rf_interfaces[0] 0x%x\n", | |
99 | ndev->supported_rf_interfaces[0]); | |
100 | pr_debug("supported_rf_interfaces[1] 0x%x\n", | |
101 | ndev->supported_rf_interfaces[1]); | |
102 | pr_debug("supported_rf_interfaces[2] 0x%x\n", | |
103 | ndev->supported_rf_interfaces[2]); | |
104 | pr_debug("supported_rf_interfaces[3] 0x%x\n", | |
105 | ndev->supported_rf_interfaces[3]); | |
106 | pr_debug("max_logical_connections %d\n", | |
107 | ndev->max_logical_connections); | |
108 | pr_debug("max_routing_table_size %d\n", | |
109 | ndev->max_routing_table_size); | |
110 | pr_debug("max_ctrl_pkt_payload_len %d\n", | |
111 | ndev->max_ctrl_pkt_payload_len); | |
112 | pr_debug("max_size_for_large_params %d\n", | |
113 | ndev->max_size_for_large_params); | |
20c239c1 JP |
114 | pr_debug("manufact_id 0x%x\n", |
115 | ndev->manufact_id); | |
116 | pr_debug("manufact_specific_info 0x%x\n", | |
117 | ndev->manufact_specific_info); | |
e8c0dacd IE |
118 | |
119 | exit: | |
6a2968aa IE |
120 | nci_req_complete(ndev, rsp_1->status); |
121 | } | |
122 | ||
6a2968aa IE |
123 | static void nci_rf_disc_map_rsp_packet(struct nci_dev *ndev, |
124 | struct sk_buff *skb) | |
125 | { | |
126 | __u8 status = skb->data[0]; | |
127 | ||
24bf3304 | 128 | pr_debug("status 0x%x\n", status); |
6a2968aa IE |
129 | |
130 | nci_req_complete(ndev, status); | |
131 | } | |
132 | ||
133 | static void nci_rf_disc_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb) | |
134 | { | |
135 | __u8 status = skb->data[0]; | |
136 | ||
24bf3304 | 137 | pr_debug("status 0x%x\n", status); |
6a2968aa IE |
138 | |
139 | if (status == NCI_STATUS_OK) | |
8939e47f | 140 | atomic_set(&ndev->state, NCI_DISCOVERY); |
6a2968aa IE |
141 | |
142 | nci_req_complete(ndev, status); | |
143 | } | |
144 | ||
145 | static void nci_rf_deactivate_rsp_packet(struct nci_dev *ndev, | |
146 | struct sk_buff *skb) | |
147 | { | |
148 | __u8 status = skb->data[0]; | |
149 | ||
24bf3304 | 150 | pr_debug("status 0x%x\n", status); |
6a2968aa | 151 | |
bd7e01bc IE |
152 | /* If target was active, complete the request only in deactivate_ntf */ |
153 | if ((status != NCI_STATUS_OK) || | |
8939e47f IE |
154 | (atomic_read(&ndev->state) != NCI_POLL_ACTIVE)) { |
155 | atomic_set(&ndev->state, NCI_IDLE); | |
bd7e01bc | 156 | nci_req_complete(ndev, status); |
8939e47f | 157 | } |
6a2968aa IE |
158 | } |
159 | ||
160 | void nci_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb) | |
161 | { | |
162 | __u16 rsp_opcode = nci_opcode(skb->data); | |
163 | ||
164 | /* we got a rsp, stop the cmd timer */ | |
165 | del_timer(&ndev->cmd_timer); | |
166 | ||
20c239c1 JP |
167 | pr_debug("NCI RX: MT=rsp, PBF=%d, GID=0x%x, OID=0x%x, plen=%d\n", |
168 | nci_pbf(skb->data), | |
169 | nci_opcode_gid(rsp_opcode), | |
170 | nci_opcode_oid(rsp_opcode), | |
171 | nci_plen(skb->data)); | |
6a2968aa IE |
172 | |
173 | /* strip the nci control header */ | |
174 | skb_pull(skb, NCI_CTRL_HDR_SIZE); | |
175 | ||
176 | switch (rsp_opcode) { | |
177 | case NCI_OP_CORE_RESET_RSP: | |
178 | nci_core_reset_rsp_packet(ndev, skb); | |
179 | break; | |
180 | ||
181 | case NCI_OP_CORE_INIT_RSP: | |
182 | nci_core_init_rsp_packet(ndev, skb); | |
183 | break; | |
184 | ||
6a2968aa IE |
185 | case NCI_OP_RF_DISCOVER_MAP_RSP: |
186 | nci_rf_disc_map_rsp_packet(ndev, skb); | |
187 | break; | |
188 | ||
189 | case NCI_OP_RF_DISCOVER_RSP: | |
190 | nci_rf_disc_rsp_packet(ndev, skb); | |
191 | break; | |
192 | ||
193 | case NCI_OP_RF_DEACTIVATE_RSP: | |
194 | nci_rf_deactivate_rsp_packet(ndev, skb); | |
195 | break; | |
196 | ||
197 | default: | |
ed1e0ad8 | 198 | pr_err("unknown rsp opcode 0x%x\n", rsp_opcode); |
6a2968aa IE |
199 | break; |
200 | } | |
201 | ||
202 | kfree_skb(skb); | |
203 | ||
204 | /* trigger the next cmd */ | |
205 | atomic_set(&ndev->cmd_cnt, 1); | |
206 | if (!skb_queue_empty(&ndev->cmd_q)) | |
207 | queue_work(ndev->cmd_wq, &ndev->cmd_work); | |
208 | } |