~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/net/nfc/nci/rsp.c

Version: ~ [ linux-5.10-rc6 ] ~ [ linux-5.9.12 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.81 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.161 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.210 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.247 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.247 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.85 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  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, see <http://www.gnu.org/licenses/>.
 24  *
 25  */
 26 
 27 #define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
 28 
 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 
 44         pr_debug("status 0x%x\n", rsp->status);
 45 
 46         if (rsp->status == NCI_STATUS_OK) {
 47                 ndev->nci_ver = rsp->nci_ver;
 48                 pr_debug("nci_ver 0x%x, config_status 0x%x\n",
 49                          rsp->nci_ver, rsp->config_status);
 50         }
 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 
 60         pr_debug("status 0x%x\n", rsp_1->status);
 61 
 62         if (rsp_1->status != NCI_STATUS_OK)
 63                 goto exit;
 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 >
 69             NCI_MAX_SUPPORTED_RF_INTERFACES) {
 70                 ndev->num_supported_rf_interfaces =
 71                         NCI_MAX_SUPPORTED_RF_INTERFACES;
 72         }
 73 
 74         memcpy(ndev->supported_rf_interfaces,
 75                rsp_1->supported_rf_interfaces,
 76                ndev->num_supported_rf_interfaces);
 77 
 78         rsp_2 = (void *) (skb->data + 6 + rsp_1->num_supported_rf_interfaces);
 79 
 80         ndev->max_logical_connections = rsp_2->max_logical_connections;
 81         ndev->max_routing_table_size =
 82                 __le16_to_cpu(rsp_2->max_routing_table_size);
 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);
 87         ndev->manufact_id =
 88                 rsp_2->manufact_id;
 89         ndev->manufact_specific_info =
 90                 __le32_to_cpu(rsp_2->manufact_specific_info);
 91 
 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);
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);
116 
117 exit:
118         nci_req_complete(ndev, rsp_1->status);
119 }
120 
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 
131 static void nci_rf_disc_map_rsp_packet(struct nci_dev *ndev,
132                                        struct sk_buff *skb)
133 {
134         __u8 status = skb->data[0];
135 
136         pr_debug("status 0x%x\n", status);
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 {
143         struct nci_conn_info    *conn_info;
144         __u8 status = skb->data[0];
145 
146         pr_debug("status 0x%x\n", status);
147 
148         if (status == NCI_STATUS_OK) {
149                 atomic_set(&ndev->state, NCI_DISCOVERY);
150 
151                 conn_info = ndev->rf_conn_info;
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);
163                         ndev->rf_conn_info = conn_info;
164                 }
165         }
166 
167 exit:
168         nci_req_complete(ndev, status);
169 }
170 
171 static void nci_rf_disc_select_rsp_packet(struct nci_dev *ndev,
172                                           struct sk_buff *skb)
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 
183 static void nci_rf_deactivate_rsp_packet(struct nci_dev *ndev,
184                                          struct sk_buff *skb)
185 {
186         __u8 status = skb->data[0];
187 
188         pr_debug("status 0x%x\n", status);
189 
190         /* If target was active, complete the request only in deactivate_ntf */
191         if ((status != NCI_STATUS_OK) ||
192             (atomic_read(&ndev->state) != NCI_POLL_ACTIVE)) {
193                 nci_clear_target_list(ndev);
194                 atomic_set(&ndev->state, NCI_IDLE);
195                 nci_req_complete(ndev, status);
196         }
197 }
198 
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 
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 
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];
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;
236 
237                 conn_info = devm_kzalloc(&ndev->nfc_dev->dev,
238                                          sizeof(*conn_info), GFP_KERNEL);
239                 if (!conn_info) {
240                         status = NCI_STATUS_REJECTED;
241                         goto exit;
242                 }
243 
244                 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 
257                 conn_info->conn_id = rsp->conn_id;
258                 conn_info->max_pkt_payload_len = rsp->max_ctrl_pkt_payload_len;
259                 atomic_set(&conn_info->credits_cnt, rsp->credits_cnt);
260         }
261 
262 exit:
263         nci_req_complete(ndev, status);
264 }
265 
266 static void nci_core_conn_close_rsp_packet(struct nci_dev *ndev,
267                                            struct sk_buff *skb)
268 {
269         struct nci_conn_info *conn_info;
270         __u8 status = skb->data[0];
271 
272         pr_debug("status 0x%x\n", status);
273         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         }
280         nci_req_complete(ndev, status);
281 }
282 
283 void 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 
290         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));
295 
296         /* strip the nci control header */
297         skb_pull(skb, NCI_CTRL_HDR_SIZE);
298 
299         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 
308         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 
317         case NCI_OP_CORE_SET_CONFIG_RSP:
318                 nci_core_set_config_rsp_packet(ndev, skb);
319                 break;
320 
321         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 
329         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 
337         case NCI_OP_RF_DISCOVER_SELECT_RSP:
338                 nci_rf_disc_select_rsp_packet(ndev, skb);
339                 break;
340 
341         case NCI_OP_RF_DEACTIVATE_RSP:
342                 nci_rf_deactivate_rsp_packet(ndev, skb);
343                 break;
344 
345         case NCI_OP_NFCEE_DISCOVER_RSP:
346                 nci_nfcee_discover_rsp_packet(ndev, skb);
347                 break;
348 
349         case NCI_OP_NFCEE_MODE_SET_RSP:
350                 nci_nfcee_mode_set_rsp_packet(ndev, skb);
351                 break;
352 
353         default:
354                 pr_err("unknown rsp opcode 0x%x\n", rsp_opcode);
355                 break;
356         }
357 
358 end:
359         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 }
366 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp