Commit | Line | Data |
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caab277b | 1 | // SPDX-License-Identifier: GPL-2.0-only |
6a2968aa IE |
2 | /* |
3 | * The NFC Controller Interface is the communication protocol between an | |
4 | * NFC Controller (NFCC) and a Device Host (DH). | |
5 | * | |
6 | * Copyright (C) 2011 Texas Instruments, Inc. | |
7 | * | |
8 | * Written by Ilan Elias <ilane@ti.com> | |
9 | * | |
10 | * Acknowledgements: | |
11 | * This file is based on hci_event.c, which was written | |
12 | * by Maxim Krasnyansky. | |
6a2968aa IE |
13 | */ |
14 | ||
52858b51 | 15 | #define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__ |
ed1e0ad8 | 16 | |
6a2968aa IE |
17 | #include <linux/types.h> |
18 | #include <linux/interrupt.h> | |
19 | #include <linux/bitops.h> | |
20 | #include <linux/skbuff.h> | |
21 | ||
22 | #include "../nfc.h" | |
23 | #include <net/nfc/nci.h> | |
24 | #include <net/nfc/nci_core.h> | |
25 | ||
26 | /* Handle NCI Response packets */ | |
27 | ||
ddecf555 KK |
28 | static void nci_core_reset_rsp_packet(struct nci_dev *ndev, |
29 | const struct sk_buff *skb) | |
6a2968aa | 30 | { |
ddecf555 | 31 | const struct nci_core_reset_rsp *rsp = (void *)skb->data; |
6a2968aa | 32 | |
24bf3304 | 33 | pr_debug("status 0x%x\n", rsp->status); |
6a2968aa | 34 | |
bcd684aa BJ |
35 | /* Handle NCI 1.x ver */ |
36 | if (skb->len != 1) { | |
37 | if (rsp->status == NCI_STATUS_OK) { | |
38 | ndev->nci_ver = rsp->nci_ver; | |
39 | pr_debug("nci_ver 0x%x, config_status 0x%x\n", | |
40 | rsp->nci_ver, rsp->config_status); | |
41 | } | |
42 | ||
43 | nci_req_complete(ndev, rsp->status); | |
e8c0dacd | 44 | } |
6a2968aa IE |
45 | } |
46 | ||
ddecf555 KK |
47 | static u8 nci_core_init_rsp_packet_v1(struct nci_dev *ndev, |
48 | const struct sk_buff *skb) | |
6a2968aa | 49 | { |
ddecf555 KK |
50 | const struct nci_core_init_rsp_1 *rsp_1 = (void *)skb->data; |
51 | const struct nci_core_init_rsp_2 *rsp_2; | |
6a2968aa | 52 | |
24bf3304 | 53 | pr_debug("status 0x%x\n", rsp_1->status); |
6a2968aa IE |
54 | |
55 | if (rsp_1->status != NCI_STATUS_OK) | |
bcd684aa | 56 | return rsp_1->status; |
6a2968aa IE |
57 | |
58 | ndev->nfcc_features = __le32_to_cpu(rsp_1->nfcc_features); | |
59 | ndev->num_supported_rf_interfaces = rsp_1->num_supported_rf_interfaces; | |
60 | ||
bcd684aa BJ |
61 | ndev->num_supported_rf_interfaces = |
62 | min((int)ndev->num_supported_rf_interfaces, | |
63 | NCI_MAX_SUPPORTED_RF_INTERFACES); | |
6a2968aa IE |
64 | |
65 | memcpy(ndev->supported_rf_interfaces, | |
eb9bc6e9 SO |
66 | rsp_1->supported_rf_interfaces, |
67 | ndev->num_supported_rf_interfaces); | |
6a2968aa | 68 | |
e8c0dacd | 69 | rsp_2 = (void *) (skb->data + 6 + rsp_1->num_supported_rf_interfaces); |
6a2968aa | 70 | |
eb9bc6e9 | 71 | ndev->max_logical_connections = rsp_2->max_logical_connections; |
6a2968aa IE |
72 | ndev->max_routing_table_size = |
73 | __le16_to_cpu(rsp_2->max_routing_table_size); | |
e8c0dacd IE |
74 | ndev->max_ctrl_pkt_payload_len = |
75 | rsp_2->max_ctrl_pkt_payload_len; | |
76 | ndev->max_size_for_large_params = | |
77 | __le16_to_cpu(rsp_2->max_size_for_large_params); | |
e8c0dacd IE |
78 | ndev->manufact_id = |
79 | rsp_2->manufact_id; | |
80 | ndev->manufact_specific_info = | |
81 | __le32_to_cpu(rsp_2->manufact_specific_info); | |
82 | ||
bcd684aa BJ |
83 | return NCI_STATUS_OK; |
84 | } | |
85 | ||
ddecf555 KK |
86 | static u8 nci_core_init_rsp_packet_v2(struct nci_dev *ndev, |
87 | const struct sk_buff *skb) | |
bcd684aa | 88 | { |
ddecf555 KK |
89 | const struct nci_core_init_rsp_nci_ver2 *rsp = (void *)skb->data; |
90 | const u8 *supported_rf_interface = rsp->supported_rf_interfaces; | |
bcd684aa BJ |
91 | u8 rf_interface_idx = 0; |
92 | u8 rf_extension_cnt = 0; | |
93 | ||
94 | pr_debug("status %x\n", rsp->status); | |
95 | ||
96 | if (rsp->status != NCI_STATUS_OK) | |
97 | return rsp->status; | |
98 | ||
99 | ndev->nfcc_features = __le32_to_cpu(rsp->nfcc_features); | |
100 | ndev->num_supported_rf_interfaces = rsp->num_supported_rf_interfaces; | |
101 | ||
102 | ndev->num_supported_rf_interfaces = | |
103 | min((int)ndev->num_supported_rf_interfaces, | |
104 | NCI_MAX_SUPPORTED_RF_INTERFACES); | |
105 | ||
106 | while (rf_interface_idx < ndev->num_supported_rf_interfaces) { | |
107 | ndev->supported_rf_interfaces[rf_interface_idx++] = *supported_rf_interface++; | |
108 | ||
109 | /* skip rf extension parameters */ | |
110 | rf_extension_cnt = *supported_rf_interface++; | |
111 | supported_rf_interface += rf_extension_cnt; | |
112 | } | |
113 | ||
114 | ndev->max_logical_connections = rsp->max_logical_connections; | |
115 | ndev->max_routing_table_size = | |
116 | __le16_to_cpu(rsp->max_routing_table_size); | |
117 | ndev->max_ctrl_pkt_payload_len = | |
118 | rsp->max_ctrl_pkt_payload_len; | |
119 | ndev->max_size_for_large_params = NCI_MAX_LARGE_PARAMS_NCI_v2; | |
120 | ||
121 | return NCI_STATUS_OK; | |
122 | } | |
123 | ||
ddecf555 | 124 | static void nci_core_init_rsp_packet(struct nci_dev *ndev, const struct sk_buff *skb) |
bcd684aa BJ |
125 | { |
126 | u8 status = 0; | |
127 | ||
128 | if (!(ndev->nci_ver & NCI_VER_2_MASK)) | |
129 | status = nci_core_init_rsp_packet_v1(ndev, skb); | |
130 | else | |
131 | status = nci_core_init_rsp_packet_v2(ndev, skb); | |
132 | ||
133 | if (status != NCI_STATUS_OK) | |
134 | goto exit; | |
135 | ||
20c239c1 JP |
136 | pr_debug("nfcc_features 0x%x\n", |
137 | ndev->nfcc_features); | |
138 | pr_debug("num_supported_rf_interfaces %d\n", | |
139 | ndev->num_supported_rf_interfaces); | |
140 | pr_debug("supported_rf_interfaces[0] 0x%x\n", | |
141 | ndev->supported_rf_interfaces[0]); | |
142 | pr_debug("supported_rf_interfaces[1] 0x%x\n", | |
143 | ndev->supported_rf_interfaces[1]); | |
144 | pr_debug("supported_rf_interfaces[2] 0x%x\n", | |
145 | ndev->supported_rf_interfaces[2]); | |
146 | pr_debug("supported_rf_interfaces[3] 0x%x\n", | |
147 | ndev->supported_rf_interfaces[3]); | |
148 | pr_debug("max_logical_connections %d\n", | |
149 | ndev->max_logical_connections); | |
150 | pr_debug("max_routing_table_size %d\n", | |
151 | ndev->max_routing_table_size); | |
152 | pr_debug("max_ctrl_pkt_payload_len %d\n", | |
153 | ndev->max_ctrl_pkt_payload_len); | |
154 | pr_debug("max_size_for_large_params %d\n", | |
155 | ndev->max_size_for_large_params); | |
20c239c1 JP |
156 | pr_debug("manufact_id 0x%x\n", |
157 | ndev->manufact_id); | |
158 | pr_debug("manufact_specific_info 0x%x\n", | |
159 | ndev->manufact_specific_info); | |
e8c0dacd IE |
160 | |
161 | exit: | |
bcd684aa | 162 | nci_req_complete(ndev, status); |
6a2968aa IE |
163 | } |
164 | ||
7e035230 | 165 | static void nci_core_set_config_rsp_packet(struct nci_dev *ndev, |
ddecf555 | 166 | const struct sk_buff *skb) |
7e035230 | 167 | { |
ddecf555 | 168 | const struct nci_core_set_config_rsp *rsp = (void *)skb->data; |
7e035230 IE |
169 | |
170 | pr_debug("status 0x%x\n", rsp->status); | |
171 | ||
172 | nci_req_complete(ndev, rsp->status); | |
173 | } | |
174 | ||
6a2968aa | 175 | static void nci_rf_disc_map_rsp_packet(struct nci_dev *ndev, |
ddecf555 | 176 | const struct sk_buff *skb) |
6a2968aa IE |
177 | { |
178 | __u8 status = skb->data[0]; | |
179 | ||
24bf3304 | 180 | pr_debug("status 0x%x\n", status); |
6a2968aa IE |
181 | |
182 | nci_req_complete(ndev, status); | |
183 | } | |
184 | ||
ddecf555 KK |
185 | static void nci_rf_disc_rsp_packet(struct nci_dev *ndev, |
186 | const struct sk_buff *skb) | |
6a2968aa | 187 | { |
77411df5 | 188 | struct nci_conn_info *conn_info; |
6a2968aa IE |
189 | __u8 status = skb->data[0]; |
190 | ||
24bf3304 | 191 | pr_debug("status 0x%x\n", status); |
6a2968aa | 192 | |
4aeee687 | 193 | if (status == NCI_STATUS_OK) { |
8939e47f | 194 | atomic_set(&ndev->state, NCI_DISCOVERY); |
6a2968aa | 195 | |
12bdf27d | 196 | conn_info = ndev->rf_conn_info; |
4aeee687 CR |
197 | if (!conn_info) { |
198 | conn_info = devm_kzalloc(&ndev->nfc_dev->dev, | |
199 | sizeof(struct nci_conn_info), | |
200 | GFP_KERNEL); | |
201 | if (!conn_info) { | |
202 | status = NCI_STATUS_REJECTED; | |
203 | goto exit; | |
204 | } | |
205 | conn_info->conn_id = NCI_STATIC_RF_CONN_ID; | |
206 | INIT_LIST_HEAD(&conn_info->list); | |
207 | list_add(&conn_info->list, &ndev->conn_info_list); | |
12bdf27d | 208 | ndev->rf_conn_info = conn_info; |
4aeee687 CR |
209 | } |
210 | } | |
211 | ||
212 | exit: | |
6a2968aa IE |
213 | nci_req_complete(ndev, status); |
214 | } | |
215 | ||
019c4fba | 216 | static void nci_rf_disc_select_rsp_packet(struct nci_dev *ndev, |
ddecf555 | 217 | const struct sk_buff *skb) |
019c4fba IE |
218 | { |
219 | __u8 status = skb->data[0]; | |
220 | ||
221 | pr_debug("status 0x%x\n", status); | |
222 | ||
223 | /* Complete the request on intf_activated_ntf or generic_error_ntf */ | |
224 | if (status != NCI_STATUS_OK) | |
225 | nci_req_complete(ndev, status); | |
226 | } | |
227 | ||
6a2968aa | 228 | static void nci_rf_deactivate_rsp_packet(struct nci_dev *ndev, |
ddecf555 | 229 | const struct sk_buff *skb) |
6a2968aa IE |
230 | { |
231 | __u8 status = skb->data[0]; | |
232 | ||
24bf3304 | 233 | pr_debug("status 0x%x\n", status); |
6a2968aa | 234 | |
bd7e01bc IE |
235 | /* If target was active, complete the request only in deactivate_ntf */ |
236 | if ((status != NCI_STATUS_OK) || | |
eb9bc6e9 | 237 | (atomic_read(&ndev->state) != NCI_POLL_ACTIVE)) { |
019c4fba | 238 | nci_clear_target_list(ndev); |
8939e47f | 239 | atomic_set(&ndev->state, NCI_IDLE); |
bd7e01bc | 240 | nci_req_complete(ndev, status); |
8939e47f | 241 | } |
6a2968aa IE |
242 | } |
243 | ||
af9c8aa6 | 244 | static void nci_nfcee_discover_rsp_packet(struct nci_dev *ndev, |
ddecf555 | 245 | const struct sk_buff *skb) |
af9c8aa6 | 246 | { |
ddecf555 | 247 | const struct nci_nfcee_discover_rsp *discover_rsp; |
af9c8aa6 CR |
248 | |
249 | if (skb->len != 2) { | |
250 | nci_req_complete(ndev, NCI_STATUS_NFCEE_PROTOCOL_ERROR); | |
251 | return; | |
252 | } | |
253 | ||
254 | discover_rsp = (struct nci_nfcee_discover_rsp *)skb->data; | |
255 | ||
256 | if (discover_rsp->status != NCI_STATUS_OK || | |
257 | discover_rsp->num_nfcee == 0) | |
258 | nci_req_complete(ndev, discover_rsp->status); | |
259 | } | |
260 | ||
f7f793f3 | 261 | static void nci_nfcee_mode_set_rsp_packet(struct nci_dev *ndev, |
ddecf555 | 262 | const struct sk_buff *skb) |
f7f793f3 CR |
263 | { |
264 | __u8 status = skb->data[0]; | |
265 | ||
266 | pr_debug("status 0x%x\n", status); | |
267 | nci_req_complete(ndev, status); | |
268 | } | |
269 | ||
736bb957 | 270 | static void nci_core_conn_create_rsp_packet(struct nci_dev *ndev, |
ddecf555 | 271 | const struct sk_buff *skb) |
736bb957 CR |
272 | { |
273 | __u8 status = skb->data[0]; | |
9b8d1a4c | 274 | struct nci_conn_info *conn_info = NULL; |
ddecf555 | 275 | const struct nci_core_conn_create_rsp *rsp; |
736bb957 CR |
276 | |
277 | pr_debug("status 0x%x\n", status); | |
278 | ||
279 | if (status == NCI_STATUS_OK) { | |
280 | rsp = (struct nci_core_conn_create_rsp *)skb->data; | |
736bb957 | 281 | |
15d4a8da CR |
282 | conn_info = devm_kzalloc(&ndev->nfc_dev->dev, |
283 | sizeof(*conn_info), GFP_KERNEL); | |
284 | if (!conn_info) { | |
736bb957 CR |
285 | status = NCI_STATUS_REJECTED; |
286 | goto exit; | |
287 | } | |
288 | ||
9b8d1a4c CR |
289 | conn_info->dest_params = devm_kzalloc(&ndev->nfc_dev->dev, |
290 | sizeof(struct dest_spec_params), | |
291 | GFP_KERNEL); | |
292 | if (!conn_info->dest_params) { | |
293 | status = NCI_STATUS_REJECTED; | |
294 | goto free_conn_info; | |
295 | } | |
296 | ||
297 | conn_info->dest_type = ndev->cur_dest_type; | |
298 | conn_info->dest_params->id = ndev->cur_params.id; | |
299 | conn_info->dest_params->protocol = ndev->cur_params.protocol; | |
15d4a8da CR |
300 | conn_info->conn_id = rsp->conn_id; |
301 | ||
302 | /* Note: data_exchange_cb and data_exchange_cb_context need to | |
303 | * be specify out of nci_core_conn_create_rsp_packet | |
304 | */ | |
305 | ||
306 | INIT_LIST_HEAD(&conn_info->list); | |
307 | list_add(&conn_info->list, &ndev->conn_info_list); | |
308 | ||
9b8d1a4c | 309 | if (ndev->cur_params.id == ndev->hci_dev->nfcee_id) |
15d4a8da CR |
310 | ndev->hci_dev->conn_info = conn_info; |
311 | ||
736bb957 CR |
312 | conn_info->conn_id = rsp->conn_id; |
313 | conn_info->max_pkt_payload_len = rsp->max_ctrl_pkt_payload_len; | |
3ba5c846 | 314 | atomic_set(&conn_info->credits_cnt, rsp->credits_cnt); |
736bb957 CR |
315 | } |
316 | ||
9b8d1a4c CR |
317 | free_conn_info: |
318 | if (status == NCI_STATUS_REJECTED) | |
319 | devm_kfree(&ndev->nfc_dev->dev, conn_info); | |
736bb957 | 320 | exit: |
9b8d1a4c | 321 | |
736bb957 CR |
322 | nci_req_complete(ndev, status); |
323 | } | |
324 | ||
325 | static void nci_core_conn_close_rsp_packet(struct nci_dev *ndev, | |
ddecf555 | 326 | const struct sk_buff *skb) |
736bb957 | 327 | { |
15d4a8da | 328 | struct nci_conn_info *conn_info; |
736bb957 CR |
329 | __u8 status = skb->data[0]; |
330 | ||
331 | pr_debug("status 0x%x\n", status); | |
15d4a8da | 332 | if (status == NCI_STATUS_OK) { |
de5ea851 CR |
333 | conn_info = nci_get_conn_info_by_conn_id(ndev, |
334 | ndev->cur_conn_id); | |
15d4a8da CR |
335 | if (conn_info) { |
336 | list_del(&conn_info->list); | |
1b1499a8 LM |
337 | if (conn_info == ndev->rf_conn_info) |
338 | ndev->rf_conn_info = NULL; | |
15d4a8da CR |
339 | devm_kfree(&ndev->nfc_dev->dev, conn_info); |
340 | } | |
341 | } | |
736bb957 CR |
342 | nci_req_complete(ndev, status); |
343 | } | |
344 | ||
6a2968aa IE |
345 | void nci_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb) |
346 | { | |
347 | __u16 rsp_opcode = nci_opcode(skb->data); | |
348 | ||
349 | /* we got a rsp, stop the cmd timer */ | |
350 | del_timer(&ndev->cmd_timer); | |
351 | ||
20c239c1 JP |
352 | pr_debug("NCI RX: MT=rsp, PBF=%d, GID=0x%x, OID=0x%x, plen=%d\n", |
353 | nci_pbf(skb->data), | |
354 | nci_opcode_gid(rsp_opcode), | |
355 | nci_opcode_oid(rsp_opcode), | |
356 | nci_plen(skb->data)); | |
6a2968aa IE |
357 | |
358 | /* strip the nci control header */ | |
359 | skb_pull(skb, NCI_CTRL_HDR_SIZE); | |
360 | ||
b6355e97 SO |
361 | if (nci_opcode_gid(rsp_opcode) == NCI_GID_PROPRIETARY) { |
362 | if (nci_prop_rsp_packet(ndev, rsp_opcode, skb) == -ENOTSUPP) { | |
363 | pr_err("unsupported rsp opcode 0x%x\n", | |
364 | rsp_opcode); | |
365 | } | |
366 | ||
367 | goto end; | |
368 | } | |
369 | ||
6a2968aa IE |
370 | switch (rsp_opcode) { |
371 | case NCI_OP_CORE_RESET_RSP: | |
372 | nci_core_reset_rsp_packet(ndev, skb); | |
373 | break; | |
374 | ||
375 | case NCI_OP_CORE_INIT_RSP: | |
376 | nci_core_init_rsp_packet(ndev, skb); | |
377 | break; | |
378 | ||
7e035230 IE |
379 | case NCI_OP_CORE_SET_CONFIG_RSP: |
380 | nci_core_set_config_rsp_packet(ndev, skb); | |
381 | break; | |
382 | ||
736bb957 CR |
383 | case NCI_OP_CORE_CONN_CREATE_RSP: |
384 | nci_core_conn_create_rsp_packet(ndev, skb); | |
385 | break; | |
386 | ||
387 | case NCI_OP_CORE_CONN_CLOSE_RSP: | |
388 | nci_core_conn_close_rsp_packet(ndev, skb); | |
389 | break; | |
390 | ||
6a2968aa IE |
391 | case NCI_OP_RF_DISCOVER_MAP_RSP: |
392 | nci_rf_disc_map_rsp_packet(ndev, skb); | |
393 | break; | |
394 | ||
395 | case NCI_OP_RF_DISCOVER_RSP: | |
396 | nci_rf_disc_rsp_packet(ndev, skb); | |
397 | break; | |
398 | ||
019c4fba IE |
399 | case NCI_OP_RF_DISCOVER_SELECT_RSP: |
400 | nci_rf_disc_select_rsp_packet(ndev, skb); | |
401 | break; | |
402 | ||
6a2968aa IE |
403 | case NCI_OP_RF_DEACTIVATE_RSP: |
404 | nci_rf_deactivate_rsp_packet(ndev, skb); | |
405 | break; | |
406 | ||
af9c8aa6 CR |
407 | case NCI_OP_NFCEE_DISCOVER_RSP: |
408 | nci_nfcee_discover_rsp_packet(ndev, skb); | |
409 | break; | |
410 | ||
f7f793f3 CR |
411 | case NCI_OP_NFCEE_MODE_SET_RSP: |
412 | nci_nfcee_mode_set_rsp_packet(ndev, skb); | |
413 | break; | |
414 | ||
6a2968aa | 415 | default: |
ed1e0ad8 | 416 | pr_err("unknown rsp opcode 0x%x\n", rsp_opcode); |
6a2968aa IE |
417 | break; |
418 | } | |
419 | ||
0a97a3cb | 420 | nci_core_rsp_packet(ndev, rsp_opcode, skb); |
b6355e97 | 421 | end: |
6a2968aa IE |
422 | kfree_skb(skb); |
423 | ||
424 | /* trigger the next cmd */ | |
425 | atomic_set(&ndev->cmd_cnt, 1); | |
426 | if (!skb_queue_empty(&ndev->cmd_q)) | |
427 | queue_work(ndev->cmd_wq, &ndev->cmd_work); | |
428 | } |