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Ilan Elias6a2968a2011-09-18 11:19:35 +03001/*
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
Jeff Kirsher98b32de2013-12-06 08:56:16 -080023 * along with this program; if not, see <http://www.gnu.org/licenses/>.
Ilan Elias6a2968a2011-09-18 11:19:35 +030024 *
25 */
26
Samuel Ortiz52858b52011-12-14 16:43:05 +010027#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
Joe Perchesed1e0ad2011-11-29 11:37:32 -080028
Ilan Elias6a2968a2011-09-18 11:19:35 +030029#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
40static 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
Joe Perches24bf3302011-11-29 11:37:35 -080044 pr_debug("status 0x%x\n", rsp->status);
Ilan Elias6a2968a2011-09-18 11:19:35 +030045
Ilan Eliase8c0dac2011-11-09 12:09:14 +020046 if (rsp->status == NCI_STATUS_OK) {
Ilan Elias6a2968a2011-09-18 11:19:35 +030047 ndev->nci_ver = rsp->nci_ver;
Joe Perches20c239c2011-11-29 11:37:33 -080048 pr_debug("nci_ver 0x%x, config_status 0x%x\n",
49 rsp->nci_ver, rsp->config_status);
Ilan Eliase8c0dac2011-11-09 12:09:14 +020050 }
Ilan Elias6a2968a2011-09-18 11:19:35 +030051
52 nci_req_complete(ndev, rsp->status);
53}
54
55static 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
Joe Perches24bf3302011-11-29 11:37:35 -080060 pr_debug("status 0x%x\n", rsp_1->status);
Ilan Elias6a2968a2011-09-18 11:19:35 +030061
62 if (rsp_1->status != NCI_STATUS_OK)
Ilan Eliase8c0dac2011-11-09 12:09:14 +020063 goto exit;
Ilan Elias6a2968a2011-09-18 11:19:35 +030064
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 >
Samuel Ortizeb9bc6e2012-03-05 01:03:54 +010069 NCI_MAX_SUPPORTED_RF_INTERFACES) {
Ilan Elias6a2968a2011-09-18 11:19:35 +030070 ndev->num_supported_rf_interfaces =
71 NCI_MAX_SUPPORTED_RF_INTERFACES;
72 }
73
74 memcpy(ndev->supported_rf_interfaces,
Samuel Ortizeb9bc6e2012-03-05 01:03:54 +010075 rsp_1->supported_rf_interfaces,
76 ndev->num_supported_rf_interfaces);
Ilan Elias6a2968a2011-09-18 11:19:35 +030077
Ilan Eliase8c0dac2011-11-09 12:09:14 +020078 rsp_2 = (void *) (skb->data + 6 + rsp_1->num_supported_rf_interfaces);
Ilan Elias6a2968a2011-09-18 11:19:35 +030079
Samuel Ortizeb9bc6e2012-03-05 01:03:54 +010080 ndev->max_logical_connections = rsp_2->max_logical_connections;
Ilan Elias6a2968a2011-09-18 11:19:35 +030081 ndev->max_routing_table_size =
82 __le16_to_cpu(rsp_2->max_routing_table_size);
Ilan Eliase8c0dac2011-11-09 12:09:14 +020083 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);
Ilan Eliase8c0dac2011-11-09 12:09:14 +020087 ndev->manufact_id =
88 rsp_2->manufact_id;
89 ndev->manufact_specific_info =
90 __le32_to_cpu(rsp_2->manufact_specific_info);
91
Joe Perches20c239c2011-11-29 11:37:33 -080092 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);
Joe Perches20c239c2011-11-29 11:37:33 -0800112 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);
Ilan Elias6a2968a2011-09-18 11:19:35 +0300116
Ilan Eliase8c0dac2011-11-09 12:09:14 +0200117exit:
Ilan Elias6a2968a2011-09-18 11:19:35 +0300118 nci_req_complete(ndev, rsp_1->status);
119}
120
Ilan Elias7e035232012-08-15 11:46:22 +0300121static 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
Ilan Elias6a2968a2011-09-18 11:19:35 +0300131static void nci_rf_disc_map_rsp_packet(struct nci_dev *ndev,
Samuel Ortizeb9bc6e2012-03-05 01:03:54 +0100132 struct sk_buff *skb)
Ilan Elias6a2968a2011-09-18 11:19:35 +0300133{
134 __u8 status = skb->data[0];
135
Joe Perches24bf3302011-11-29 11:37:35 -0800136 pr_debug("status 0x%x\n", status);
Ilan Elias6a2968a2011-09-18 11:19:35 +0300137
138 nci_req_complete(ndev, status);
139}
140
141static void nci_rf_disc_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb)
142{
Christophe Ricard4aeee682015-02-01 22:26:08 +0100143 struct nci_conn_info *conn_info;
Ilan Elias6a2968a2011-09-18 11:19:35 +0300144 __u8 status = skb->data[0];
145
Joe Perches24bf3302011-11-29 11:37:35 -0800146 pr_debug("status 0x%x\n", status);
Ilan Elias6a2968a2011-09-18 11:19:35 +0300147
Christophe Ricard4aeee682015-02-01 22:26:08 +0100148 if (status == NCI_STATUS_OK) {
Ilan Elias8939e472012-01-18 13:16:12 +0200149 atomic_set(&ndev->state, NCI_DISCOVERY);
Ilan Elias6a2968a2011-09-18 11:19:35 +0300150
Christophe Ricard12bdf272015-02-03 19:48:04 +0100151 conn_info = ndev->rf_conn_info;
Christophe Ricard4aeee682015-02-01 22:26:08 +0100152 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);
Christophe Ricard12bdf272015-02-03 19:48:04 +0100163 ndev->rf_conn_info = conn_info;
Christophe Ricard4aeee682015-02-01 22:26:08 +0100164 }
165 }
166
167exit:
Ilan Elias6a2968a2011-09-18 11:19:35 +0300168 nci_req_complete(ndev, status);
169}
170
Ilan Elias019c4fb2012-01-18 13:16:14 +0200171static void nci_rf_disc_select_rsp_packet(struct nci_dev *ndev,
Samuel Ortizeb9bc6e2012-03-05 01:03:54 +0100172 struct sk_buff *skb)
Ilan Elias019c4fb2012-01-18 13:16:14 +0200173{
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
Ilan Elias6a2968a2011-09-18 11:19:35 +0300183static void nci_rf_deactivate_rsp_packet(struct nci_dev *ndev,
Samuel Ortizeb9bc6e2012-03-05 01:03:54 +0100184 struct sk_buff *skb)
Ilan Elias6a2968a2011-09-18 11:19:35 +0300185{
186 __u8 status = skb->data[0];
187
Joe Perches24bf3302011-11-29 11:37:35 -0800188 pr_debug("status 0x%x\n", status);
Ilan Elias6a2968a2011-09-18 11:19:35 +0300189
Ilan Eliasbd7e01b2012-01-08 11:21:53 +0200190 /* If target was active, complete the request only in deactivate_ntf */
191 if ((status != NCI_STATUS_OK) ||
Samuel Ortizeb9bc6e2012-03-05 01:03:54 +0100192 (atomic_read(&ndev->state) != NCI_POLL_ACTIVE)) {
Ilan Elias019c4fb2012-01-18 13:16:14 +0200193 nci_clear_target_list(ndev);
Ilan Elias8939e472012-01-18 13:16:12 +0200194 atomic_set(&ndev->state, NCI_IDLE);
Ilan Eliasbd7e01b2012-01-08 11:21:53 +0200195 nci_req_complete(ndev, status);
Ilan Elias8939e472012-01-18 13:16:12 +0200196 }
Ilan Elias6a2968a2011-09-18 11:19:35 +0300197}
198
Christophe Ricardaf9c8aa2015-02-01 22:26:10 +0100199static 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
Christophe Ricardf7f793f2015-02-01 22:26:11 +0100216static 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
Christophe Ricard736bb952015-02-01 22:26:12 +0100225static void nci_core_conn_create_rsp_packet(struct nci_dev *ndev,
226 struct sk_buff *skb)
227{
228 __u8 status = skb->data[0];
229 struct nci_conn_info *conn_info;
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;
Christophe Ricard736bb952015-02-01 22:26:12 +0100236
Christophe Ricard15d4a8d2015-02-03 19:48:07 +0100237 conn_info = devm_kzalloc(&ndev->nfc_dev->dev,
238 sizeof(*conn_info), GFP_KERNEL);
239 if (!conn_info) {
Christophe Ricard736bb952015-02-01 22:26:12 +0100240 status = NCI_STATUS_REJECTED;
241 goto exit;
242 }
243
Christophe Ricard15d4a8d2015-02-03 19:48:07 +0100244 conn_info->id = ndev->cur_id;
245 conn_info->conn_id = rsp->conn_id;
246
247 /* Note: data_exchange_cb and data_exchange_cb_context need to
248 * be specify out of nci_core_conn_create_rsp_packet
249 */
250
251 INIT_LIST_HEAD(&conn_info->list);
252 list_add(&conn_info->list, &ndev->conn_info_list);
253
254 if (ndev->cur_id == ndev->hci_dev->nfcee_id)
255 ndev->hci_dev->conn_info = conn_info;
256
Christophe Ricard736bb952015-02-01 22:26:12 +0100257 conn_info->conn_id = rsp->conn_id;
258 conn_info->max_pkt_payload_len = rsp->max_ctrl_pkt_payload_len;
Christophe Ricard3ba5c842015-02-03 19:48:06 +0100259 atomic_set(&conn_info->credits_cnt, rsp->credits_cnt);
Christophe Ricard736bb952015-02-01 22:26:12 +0100260 }
261
262exit:
263 nci_req_complete(ndev, status);
264}
265
266static void nci_core_conn_close_rsp_packet(struct nci_dev *ndev,
267 struct sk_buff *skb)
268{
Christophe Ricard15d4a8d2015-02-03 19:48:07 +0100269 struct nci_conn_info *conn_info;
Christophe Ricard736bb952015-02-01 22:26:12 +0100270 __u8 status = skb->data[0];
271
272 pr_debug("status 0x%x\n", status);
Christophe Ricard15d4a8d2015-02-03 19:48:07 +0100273 if (status == NCI_STATUS_OK) {
274 conn_info = nci_get_conn_info_by_conn_id(ndev, ndev->cur_id);
275 if (conn_info) {
276 list_del(&conn_info->list);
277 devm_kfree(&ndev->nfc_dev->dev, conn_info);
278 }
279 }
Christophe Ricard736bb952015-02-01 22:26:12 +0100280 nci_req_complete(ndev, status);
281}
282
Ilan Elias6a2968a2011-09-18 11:19:35 +0300283void nci_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb)
284{
285 __u16 rsp_opcode = nci_opcode(skb->data);
286
287 /* we got a rsp, stop the cmd timer */
288 del_timer(&ndev->cmd_timer);
289
Joe Perches20c239c2011-11-29 11:37:33 -0800290 pr_debug("NCI RX: MT=rsp, PBF=%d, GID=0x%x, OID=0x%x, plen=%d\n",
291 nci_pbf(skb->data),
292 nci_opcode_gid(rsp_opcode),
293 nci_opcode_oid(rsp_opcode),
294 nci_plen(skb->data));
Ilan Elias6a2968a2011-09-18 11:19:35 +0300295
296 /* strip the nci control header */
297 skb_pull(skb, NCI_CTRL_HDR_SIZE);
298
Samuel Ortizb6355e92015-06-06 13:16:37 +0200299 if (nci_opcode_gid(rsp_opcode) == NCI_GID_PROPRIETARY) {
300 if (nci_prop_rsp_packet(ndev, rsp_opcode, skb) == -ENOTSUPP) {
301 pr_err("unsupported rsp opcode 0x%x\n",
302 rsp_opcode);
303 }
304
305 goto end;
306 }
307
Ilan Elias6a2968a2011-09-18 11:19:35 +0300308 switch (rsp_opcode) {
309 case NCI_OP_CORE_RESET_RSP:
310 nci_core_reset_rsp_packet(ndev, skb);
311 break;
312
313 case NCI_OP_CORE_INIT_RSP:
314 nci_core_init_rsp_packet(ndev, skb);
315 break;
316
Ilan Elias7e035232012-08-15 11:46:22 +0300317 case NCI_OP_CORE_SET_CONFIG_RSP:
318 nci_core_set_config_rsp_packet(ndev, skb);
319 break;
320
Christophe Ricard736bb952015-02-01 22:26:12 +0100321 case NCI_OP_CORE_CONN_CREATE_RSP:
322 nci_core_conn_create_rsp_packet(ndev, skb);
323 break;
324
325 case NCI_OP_CORE_CONN_CLOSE_RSP:
326 nci_core_conn_close_rsp_packet(ndev, skb);
327 break;
328
Ilan Elias6a2968a2011-09-18 11:19:35 +0300329 case NCI_OP_RF_DISCOVER_MAP_RSP:
330 nci_rf_disc_map_rsp_packet(ndev, skb);
331 break;
332
333 case NCI_OP_RF_DISCOVER_RSP:
334 nci_rf_disc_rsp_packet(ndev, skb);
335 break;
336
Ilan Elias019c4fb2012-01-18 13:16:14 +0200337 case NCI_OP_RF_DISCOVER_SELECT_RSP:
338 nci_rf_disc_select_rsp_packet(ndev, skb);
339 break;
340
Ilan Elias6a2968a2011-09-18 11:19:35 +0300341 case NCI_OP_RF_DEACTIVATE_RSP:
342 nci_rf_deactivate_rsp_packet(ndev, skb);
343 break;
344
Christophe Ricardaf9c8aa2015-02-01 22:26:10 +0100345 case NCI_OP_NFCEE_DISCOVER_RSP:
346 nci_nfcee_discover_rsp_packet(ndev, skb);
347 break;
348
Christophe Ricardf7f793f2015-02-01 22:26:11 +0100349 case NCI_OP_NFCEE_MODE_SET_RSP:
350 nci_nfcee_mode_set_rsp_packet(ndev, skb);
351 break;
352
Ilan Elias6a2968a2011-09-18 11:19:35 +0300353 default:
Joe Perchesed1e0ad2011-11-29 11:37:32 -0800354 pr_err("unknown rsp opcode 0x%x\n", rsp_opcode);
Ilan Elias6a2968a2011-09-18 11:19:35 +0300355 break;
356 }
357
Samuel Ortizb6355e92015-06-06 13:16:37 +0200358end:
Ilan Elias6a2968a2011-09-18 11:19:35 +0300359 kfree_skb(skb);
360
361 /* trigger the next cmd */
362 atomic_set(&ndev->cmd_cnt, 1);
363 if (!skb_queue_empty(&ndev->cmd_q))
364 queue_work(ndev->cmd_wq, &ndev->cmd_work);
365}