Commit | Line | Data |
---|---|---|
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 | |
98b32dec | 23 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
6a2968aa IE |
24 | * |
25 | */ | |
26 | ||
52858b51 | 27 | #define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__ |
ed1e0ad8 | 28 | |
6a2968aa IE |
29 | #include <linux/types.h> |
30 | #include <linux/interrupt.h> | |
31 | #include <linux/bitops.h> | |
32 | #include <linux/skbuff.h> | |
33 | ||
34 | #include "../nfc.h" | |
35 | #include <net/nfc/nci.h> | |
36 | #include <net/nfc/nci_core.h> | |
37 | ||
38 | /* Handle NCI Response packets */ | |
39 | ||
40 | static void nci_core_reset_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb) | |
41 | { | |
42 | struct nci_core_reset_rsp *rsp = (void *) skb->data; | |
43 | ||
24bf3304 | 44 | pr_debug("status 0x%x\n", rsp->status); |
6a2968aa | 45 | |
e8c0dacd | 46 | if (rsp->status == NCI_STATUS_OK) { |
6a2968aa | 47 | ndev->nci_ver = rsp->nci_ver; |
20c239c1 JP |
48 | pr_debug("nci_ver 0x%x, config_status 0x%x\n", |
49 | rsp->nci_ver, rsp->config_status); | |
e8c0dacd | 50 | } |
6a2968aa IE |
51 | |
52 | nci_req_complete(ndev, rsp->status); | |
53 | } | |
54 | ||
55 | static void nci_core_init_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb) | |
56 | { | |
57 | struct nci_core_init_rsp_1 *rsp_1 = (void *) skb->data; | |
58 | struct nci_core_init_rsp_2 *rsp_2; | |
59 | ||
24bf3304 | 60 | pr_debug("status 0x%x\n", rsp_1->status); |
6a2968aa IE |
61 | |
62 | if (rsp_1->status != NCI_STATUS_OK) | |
e8c0dacd | 63 | goto exit; |
6a2968aa IE |
64 | |
65 | ndev->nfcc_features = __le32_to_cpu(rsp_1->nfcc_features); | |
66 | ndev->num_supported_rf_interfaces = rsp_1->num_supported_rf_interfaces; | |
67 | ||
68 | if (ndev->num_supported_rf_interfaces > | |
eb9bc6e9 | 69 | NCI_MAX_SUPPORTED_RF_INTERFACES) { |
6a2968aa IE |
70 | ndev->num_supported_rf_interfaces = |
71 | NCI_MAX_SUPPORTED_RF_INTERFACES; | |
72 | } | |
73 | ||
74 | memcpy(ndev->supported_rf_interfaces, | |
eb9bc6e9 SO |
75 | rsp_1->supported_rf_interfaces, |
76 | ndev->num_supported_rf_interfaces); | |
6a2968aa | 77 | |
e8c0dacd | 78 | rsp_2 = (void *) (skb->data + 6 + rsp_1->num_supported_rf_interfaces); |
6a2968aa | 79 | |
eb9bc6e9 | 80 | ndev->max_logical_connections = rsp_2->max_logical_connections; |
6a2968aa IE |
81 | ndev->max_routing_table_size = |
82 | __le16_to_cpu(rsp_2->max_routing_table_size); | |
e8c0dacd IE |
83 | ndev->max_ctrl_pkt_payload_len = |
84 | rsp_2->max_ctrl_pkt_payload_len; | |
85 | ndev->max_size_for_large_params = | |
86 | __le16_to_cpu(rsp_2->max_size_for_large_params); | |
e8c0dacd IE |
87 | ndev->manufact_id = |
88 | rsp_2->manufact_id; | |
89 | ndev->manufact_specific_info = | |
90 | __le32_to_cpu(rsp_2->manufact_specific_info); | |
91 | ||
20c239c1 JP |
92 | pr_debug("nfcc_features 0x%x\n", |
93 | ndev->nfcc_features); | |
94 | pr_debug("num_supported_rf_interfaces %d\n", | |
95 | ndev->num_supported_rf_interfaces); | |
96 | pr_debug("supported_rf_interfaces[0] 0x%x\n", | |
97 | ndev->supported_rf_interfaces[0]); | |
98 | pr_debug("supported_rf_interfaces[1] 0x%x\n", | |
99 | ndev->supported_rf_interfaces[1]); | |
100 | pr_debug("supported_rf_interfaces[2] 0x%x\n", | |
101 | ndev->supported_rf_interfaces[2]); | |
102 | pr_debug("supported_rf_interfaces[3] 0x%x\n", | |
103 | ndev->supported_rf_interfaces[3]); | |
104 | pr_debug("max_logical_connections %d\n", | |
105 | ndev->max_logical_connections); | |
106 | pr_debug("max_routing_table_size %d\n", | |
107 | ndev->max_routing_table_size); | |
108 | pr_debug("max_ctrl_pkt_payload_len %d\n", | |
109 | ndev->max_ctrl_pkt_payload_len); | |
110 | pr_debug("max_size_for_large_params %d\n", | |
111 | ndev->max_size_for_large_params); | |
20c239c1 JP |
112 | pr_debug("manufact_id 0x%x\n", |
113 | ndev->manufact_id); | |
114 | pr_debug("manufact_specific_info 0x%x\n", | |
115 | ndev->manufact_specific_info); | |
e8c0dacd IE |
116 | |
117 | exit: | |
6a2968aa IE |
118 | nci_req_complete(ndev, rsp_1->status); |
119 | } | |
120 | ||
7e035230 IE |
121 | static void nci_core_set_config_rsp_packet(struct nci_dev *ndev, |
122 | struct sk_buff *skb) | |
123 | { | |
124 | struct nci_core_set_config_rsp *rsp = (void *) skb->data; | |
125 | ||
126 | pr_debug("status 0x%x\n", rsp->status); | |
127 | ||
128 | nci_req_complete(ndev, rsp->status); | |
129 | } | |
130 | ||
6a2968aa | 131 | static void nci_rf_disc_map_rsp_packet(struct nci_dev *ndev, |
eb9bc6e9 | 132 | struct sk_buff *skb) |
6a2968aa IE |
133 | { |
134 | __u8 status = skb->data[0]; | |
135 | ||
24bf3304 | 136 | pr_debug("status 0x%x\n", status); |
6a2968aa IE |
137 | |
138 | nci_req_complete(ndev, status); | |
139 | } | |
140 | ||
141 | static void nci_rf_disc_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb) | |
142 | { | |
4aeee687 | 143 | struct nci_conn_info *conn_info; |
6a2968aa IE |
144 | __u8 status = skb->data[0]; |
145 | ||
24bf3304 | 146 | pr_debug("status 0x%x\n", status); |
6a2968aa | 147 | |
4aeee687 | 148 | if (status == NCI_STATUS_OK) { |
8939e47f | 149 | atomic_set(&ndev->state, NCI_DISCOVERY); |
6a2968aa | 150 | |
12bdf27d | 151 | conn_info = ndev->rf_conn_info; |
4aeee687 CR |
152 | if (!conn_info) { |
153 | conn_info = devm_kzalloc(&ndev->nfc_dev->dev, | |
154 | sizeof(struct nci_conn_info), | |
155 | GFP_KERNEL); | |
156 | if (!conn_info) { | |
157 | status = NCI_STATUS_REJECTED; | |
158 | goto exit; | |
159 | } | |
160 | conn_info->conn_id = NCI_STATIC_RF_CONN_ID; | |
161 | INIT_LIST_HEAD(&conn_info->list); | |
162 | list_add(&conn_info->list, &ndev->conn_info_list); | |
12bdf27d | 163 | ndev->rf_conn_info = conn_info; |
4aeee687 CR |
164 | } |
165 | } | |
166 | ||
167 | exit: | |
6a2968aa IE |
168 | nci_req_complete(ndev, status); |
169 | } | |
170 | ||
019c4fba | 171 | static void nci_rf_disc_select_rsp_packet(struct nci_dev *ndev, |
eb9bc6e9 | 172 | struct sk_buff *skb) |
019c4fba IE |
173 | { |
174 | __u8 status = skb->data[0]; | |
175 | ||
176 | pr_debug("status 0x%x\n", status); | |
177 | ||
178 | /* Complete the request on intf_activated_ntf or generic_error_ntf */ | |
179 | if (status != NCI_STATUS_OK) | |
180 | nci_req_complete(ndev, status); | |
181 | } | |
182 | ||
6a2968aa | 183 | static void nci_rf_deactivate_rsp_packet(struct nci_dev *ndev, |
eb9bc6e9 | 184 | struct sk_buff *skb) |
6a2968aa IE |
185 | { |
186 | __u8 status = skb->data[0]; | |
187 | ||
24bf3304 | 188 | pr_debug("status 0x%x\n", status); |
6a2968aa | 189 | |
bd7e01bc IE |
190 | /* If target was active, complete the request only in deactivate_ntf */ |
191 | if ((status != NCI_STATUS_OK) || | |
eb9bc6e9 | 192 | (atomic_read(&ndev->state) != NCI_POLL_ACTIVE)) { |
019c4fba | 193 | nci_clear_target_list(ndev); |
8939e47f | 194 | atomic_set(&ndev->state, NCI_IDLE); |
bd7e01bc | 195 | nci_req_complete(ndev, status); |
8939e47f | 196 | } |
6a2968aa IE |
197 | } |
198 | ||
af9c8aa6 CR |
199 | static void nci_nfcee_discover_rsp_packet(struct nci_dev *ndev, |
200 | struct sk_buff *skb) | |
201 | { | |
202 | struct nci_nfcee_discover_rsp *discover_rsp; | |
203 | ||
204 | if (skb->len != 2) { | |
205 | nci_req_complete(ndev, NCI_STATUS_NFCEE_PROTOCOL_ERROR); | |
206 | return; | |
207 | } | |
208 | ||
209 | discover_rsp = (struct nci_nfcee_discover_rsp *)skb->data; | |
210 | ||
211 | if (discover_rsp->status != NCI_STATUS_OK || | |
212 | discover_rsp->num_nfcee == 0) | |
213 | nci_req_complete(ndev, discover_rsp->status); | |
214 | } | |
215 | ||
f7f793f3 CR |
216 | static void nci_nfcee_mode_set_rsp_packet(struct nci_dev *ndev, |
217 | struct sk_buff *skb) | |
218 | { | |
219 | __u8 status = skb->data[0]; | |
220 | ||
221 | pr_debug("status 0x%x\n", status); | |
222 | nci_req_complete(ndev, status); | |
223 | } | |
224 | ||
736bb957 CR |
225 | static void nci_core_conn_create_rsp_packet(struct nci_dev *ndev, |
226 | struct sk_buff *skb) | |
227 | { | |
228 | __u8 status = skb->data[0]; | |
9b8d1a4c | 229 | struct nci_conn_info *conn_info = NULL; |
736bb957 CR |
230 | struct nci_core_conn_create_rsp *rsp; |
231 | ||
232 | pr_debug("status 0x%x\n", status); | |
233 | ||
234 | if (status == NCI_STATUS_OK) { | |
235 | rsp = (struct nci_core_conn_create_rsp *)skb->data; | |
736bb957 | 236 | |
15d4a8da CR |
237 | conn_info = devm_kzalloc(&ndev->nfc_dev->dev, |
238 | sizeof(*conn_info), GFP_KERNEL); | |
239 | if (!conn_info) { | |
736bb957 CR |
240 | status = NCI_STATUS_REJECTED; |
241 | goto exit; | |
242 | } | |
243 | ||
9b8d1a4c CR |
244 | conn_info->dest_params = devm_kzalloc(&ndev->nfc_dev->dev, |
245 | sizeof(struct dest_spec_params), | |
246 | GFP_KERNEL); | |
247 | if (!conn_info->dest_params) { | |
248 | status = NCI_STATUS_REJECTED; | |
249 | goto free_conn_info; | |
250 | } | |
251 | ||
252 | conn_info->dest_type = ndev->cur_dest_type; | |
253 | conn_info->dest_params->id = ndev->cur_params.id; | |
254 | conn_info->dest_params->protocol = ndev->cur_params.protocol; | |
15d4a8da CR |
255 | conn_info->conn_id = rsp->conn_id; |
256 | ||
257 | /* Note: data_exchange_cb and data_exchange_cb_context need to | |
258 | * be specify out of nci_core_conn_create_rsp_packet | |
259 | */ | |
260 | ||
261 | INIT_LIST_HEAD(&conn_info->list); | |
262 | list_add(&conn_info->list, &ndev->conn_info_list); | |
263 | ||
9b8d1a4c | 264 | if (ndev->cur_params.id == ndev->hci_dev->nfcee_id) |
15d4a8da CR |
265 | ndev->hci_dev->conn_info = conn_info; |
266 | ||
736bb957 CR |
267 | conn_info->conn_id = rsp->conn_id; |
268 | conn_info->max_pkt_payload_len = rsp->max_ctrl_pkt_payload_len; | |
3ba5c846 | 269 | atomic_set(&conn_info->credits_cnt, rsp->credits_cnt); |
736bb957 CR |
270 | } |
271 | ||
9b8d1a4c CR |
272 | free_conn_info: |
273 | if (status == NCI_STATUS_REJECTED) | |
274 | devm_kfree(&ndev->nfc_dev->dev, conn_info); | |
736bb957 | 275 | exit: |
9b8d1a4c | 276 | |
736bb957 CR |
277 | nci_req_complete(ndev, status); |
278 | } | |
279 | ||
280 | static void nci_core_conn_close_rsp_packet(struct nci_dev *ndev, | |
281 | struct sk_buff *skb) | |
282 | { | |
15d4a8da | 283 | struct nci_conn_info *conn_info; |
736bb957 CR |
284 | __u8 status = skb->data[0]; |
285 | ||
286 | pr_debug("status 0x%x\n", status); | |
15d4a8da | 287 | if (status == NCI_STATUS_OK) { |
de5ea851 CR |
288 | conn_info = nci_get_conn_info_by_conn_id(ndev, |
289 | ndev->cur_conn_id); | |
15d4a8da CR |
290 | if (conn_info) { |
291 | list_del(&conn_info->list); | |
292 | devm_kfree(&ndev->nfc_dev->dev, conn_info); | |
293 | } | |
294 | } | |
736bb957 CR |
295 | nci_req_complete(ndev, status); |
296 | } | |
297 | ||
6a2968aa IE |
298 | void nci_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb) |
299 | { | |
300 | __u16 rsp_opcode = nci_opcode(skb->data); | |
301 | ||
302 | /* we got a rsp, stop the cmd timer */ | |
303 | del_timer(&ndev->cmd_timer); | |
304 | ||
20c239c1 JP |
305 | pr_debug("NCI RX: MT=rsp, PBF=%d, GID=0x%x, OID=0x%x, plen=%d\n", |
306 | nci_pbf(skb->data), | |
307 | nci_opcode_gid(rsp_opcode), | |
308 | nci_opcode_oid(rsp_opcode), | |
309 | nci_plen(skb->data)); | |
6a2968aa IE |
310 | |
311 | /* strip the nci control header */ | |
312 | skb_pull(skb, NCI_CTRL_HDR_SIZE); | |
313 | ||
b6355e97 SO |
314 | if (nci_opcode_gid(rsp_opcode) == NCI_GID_PROPRIETARY) { |
315 | if (nci_prop_rsp_packet(ndev, rsp_opcode, skb) == -ENOTSUPP) { | |
316 | pr_err("unsupported rsp opcode 0x%x\n", | |
317 | rsp_opcode); | |
318 | } | |
319 | ||
320 | goto end; | |
321 | } | |
322 | ||
6a2968aa IE |
323 | switch (rsp_opcode) { |
324 | case NCI_OP_CORE_RESET_RSP: | |
325 | nci_core_reset_rsp_packet(ndev, skb); | |
326 | break; | |
327 | ||
328 | case NCI_OP_CORE_INIT_RSP: | |
329 | nci_core_init_rsp_packet(ndev, skb); | |
330 | break; | |
331 | ||
7e035230 IE |
332 | case NCI_OP_CORE_SET_CONFIG_RSP: |
333 | nci_core_set_config_rsp_packet(ndev, skb); | |
334 | break; | |
335 | ||
736bb957 CR |
336 | case NCI_OP_CORE_CONN_CREATE_RSP: |
337 | nci_core_conn_create_rsp_packet(ndev, skb); | |
338 | break; | |
339 | ||
340 | case NCI_OP_CORE_CONN_CLOSE_RSP: | |
341 | nci_core_conn_close_rsp_packet(ndev, skb); | |
342 | break; | |
343 | ||
6a2968aa IE |
344 | case NCI_OP_RF_DISCOVER_MAP_RSP: |
345 | nci_rf_disc_map_rsp_packet(ndev, skb); | |
346 | break; | |
347 | ||
348 | case NCI_OP_RF_DISCOVER_RSP: | |
349 | nci_rf_disc_rsp_packet(ndev, skb); | |
350 | break; | |
351 | ||
019c4fba IE |
352 | case NCI_OP_RF_DISCOVER_SELECT_RSP: |
353 | nci_rf_disc_select_rsp_packet(ndev, skb); | |
354 | break; | |
355 | ||
6a2968aa IE |
356 | case NCI_OP_RF_DEACTIVATE_RSP: |
357 | nci_rf_deactivate_rsp_packet(ndev, skb); | |
358 | break; | |
359 | ||
af9c8aa6 CR |
360 | case NCI_OP_NFCEE_DISCOVER_RSP: |
361 | nci_nfcee_discover_rsp_packet(ndev, skb); | |
362 | break; | |
363 | ||
f7f793f3 CR |
364 | case NCI_OP_NFCEE_MODE_SET_RSP: |
365 | nci_nfcee_mode_set_rsp_packet(ndev, skb); | |
366 | break; | |
367 | ||
6a2968aa | 368 | default: |
ed1e0ad8 | 369 | pr_err("unknown rsp opcode 0x%x\n", rsp_opcode); |
6a2968aa IE |
370 | break; |
371 | } | |
372 | ||
0a97a3cb | 373 | nci_core_rsp_packet(ndev, rsp_opcode, skb); |
b6355e97 | 374 | end: |
6a2968aa IE |
375 | kfree_skb(skb); |
376 | ||
377 | /* trigger the next cmd */ | |
378 | atomic_set(&ndev->cmd_cnt, 1); | |
379 | if (!skb_queue_empty(&ndev->cmd_q)) | |
380 | queue_work(ndev->cmd_wq, &ndev->cmd_work); | |
381 | } |