Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 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 | |
Samuel Ortiz | 52858b5 | 2011-12-14 16:43:05 +0100 | [diff] [blame] | 28 | #define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__ |
Joe Perches | ed1e0ad | 2011-11-29 11:37:32 -0800 | [diff] [blame] | 29 | |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 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 | #include <linux/nfc.h> |
| 39 | |
| 40 | /* Handle NCI Notification packets */ |
| 41 | |
| 42 | static void nci_core_conn_credits_ntf_packet(struct nci_dev *ndev, |
| 43 | struct sk_buff *skb) |
| 44 | { |
| 45 | struct nci_core_conn_credit_ntf *ntf = (void *) skb->data; |
| 46 | int i; |
| 47 | |
Joe Perches | 24bf330 | 2011-11-29 11:37:35 -0800 | [diff] [blame] | 48 | pr_debug("num_entries %d\n", ntf->num_entries); |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 49 | |
| 50 | if (ntf->num_entries > NCI_MAX_NUM_CONN) |
| 51 | ntf->num_entries = NCI_MAX_NUM_CONN; |
| 52 | |
| 53 | /* update the credits */ |
| 54 | for (i = 0; i < ntf->num_entries; i++) { |
Ilan Elias | 637d85a | 2011-12-20 16:57:40 +0200 | [diff] [blame] | 55 | ntf->conn_entries[i].conn_id = |
| 56 | nci_conn_id(&ntf->conn_entries[i].conn_id); |
| 57 | |
Joe Perches | 20c239c | 2011-11-29 11:37:33 -0800 | [diff] [blame] | 58 | pr_debug("entry[%d]: conn_id %d, credits %d\n", |
| 59 | i, ntf->conn_entries[i].conn_id, |
| 60 | ntf->conn_entries[i].credits); |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 61 | |
Ilan Elias | e8c0dac | 2011-11-09 12:09:14 +0200 | [diff] [blame] | 62 | if (ntf->conn_entries[i].conn_id == NCI_STATIC_RF_CONN_ID) { |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 63 | /* found static rf connection */ |
| 64 | atomic_add(ntf->conn_entries[i].credits, |
| 65 | &ndev->credits_cnt); |
| 66 | } |
| 67 | } |
| 68 | |
| 69 | /* trigger the next tx */ |
| 70 | if (!skb_queue_empty(&ndev->tx_q)) |
| 71 | queue_work(ndev->tx_wq, &ndev->tx_work); |
| 72 | } |
| 73 | |
Ilan Elias | 019c4fb | 2012-01-18 13:16:14 +0200 | [diff] [blame^] | 74 | static void nci_core_generic_error_ntf_packet(struct nci_dev *ndev, |
| 75 | struct sk_buff *skb) |
| 76 | { |
| 77 | __u8 status = skb->data[0]; |
| 78 | |
| 79 | pr_debug("status 0x%x\n", status); |
| 80 | |
| 81 | if (atomic_read(&ndev->state) == NCI_W4_HOST_SELECT) { |
| 82 | /* Activation failed, so complete the request |
| 83 | (the state remains the same) */ |
| 84 | nci_req_complete(ndev, status); |
| 85 | } |
| 86 | } |
| 87 | |
Ilan Elias | 004161c | 2011-12-20 16:57:41 +0200 | [diff] [blame] | 88 | static void nci_core_conn_intf_error_ntf_packet(struct nci_dev *ndev, |
| 89 | struct sk_buff *skb) |
| 90 | { |
| 91 | struct nci_core_intf_error_ntf *ntf = (void *) skb->data; |
| 92 | |
| 93 | ntf->conn_id = nci_conn_id(&ntf->conn_id); |
| 94 | |
| 95 | pr_debug("status 0x%x, conn_id %d\n", ntf->status, ntf->conn_id); |
| 96 | |
| 97 | /* complete the data exchange transaction, if exists */ |
| 98 | if (test_bit(NCI_DATA_EXCHANGE, &ndev->flags)) |
| 99 | nci_data_exchange_complete(ndev, NULL, -EIO); |
| 100 | } |
| 101 | |
Ilan Elias | e8c0dac | 2011-11-09 12:09:14 +0200 | [diff] [blame] | 102 | static __u8 *nci_extract_rf_params_nfca_passive_poll(struct nci_dev *ndev, |
Ilan Elias | 019c4fb | 2012-01-18 13:16:14 +0200 | [diff] [blame^] | 103 | struct rf_tech_specific_params_nfca_poll *nfca_poll, |
| 104 | __u8 *data) |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 105 | { |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 106 | nfca_poll->sens_res = __le16_to_cpu(*((__u16 *)data)); |
| 107 | data += 2; |
| 108 | |
| 109 | nfca_poll->nfcid1_len = *data++; |
| 110 | |
Joe Perches | 20c239c | 2011-11-29 11:37:33 -0800 | [diff] [blame] | 111 | pr_debug("sens_res 0x%x, nfcid1_len %d\n", |
| 112 | nfca_poll->sens_res, nfca_poll->nfcid1_len); |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 113 | |
| 114 | memcpy(nfca_poll->nfcid1, data, nfca_poll->nfcid1_len); |
| 115 | data += nfca_poll->nfcid1_len; |
| 116 | |
| 117 | nfca_poll->sel_res_len = *data++; |
| 118 | |
| 119 | if (nfca_poll->sel_res_len != 0) |
| 120 | nfca_poll->sel_res = *data++; |
| 121 | |
Joe Perches | 20c239c | 2011-11-29 11:37:33 -0800 | [diff] [blame] | 122 | pr_debug("sel_res_len %d, sel_res 0x%x\n", |
| 123 | nfca_poll->sel_res_len, |
| 124 | nfca_poll->sel_res); |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 125 | |
Ilan Elias | e8c0dac | 2011-11-09 12:09:14 +0200 | [diff] [blame] | 126 | return data; |
| 127 | } |
| 128 | |
Ilan Elias | d5a2ca6 | 2012-01-17 11:06:43 +0200 | [diff] [blame] | 129 | static __u8 *nci_extract_rf_params_nfcb_passive_poll(struct nci_dev *ndev, |
Ilan Elias | 019c4fb | 2012-01-18 13:16:14 +0200 | [diff] [blame^] | 130 | struct rf_tech_specific_params_nfcb_poll *nfcb_poll, |
| 131 | __u8 *data) |
Ilan Elias | d5a2ca6 | 2012-01-17 11:06:43 +0200 | [diff] [blame] | 132 | { |
Ilan Elias | d5a2ca6 | 2012-01-17 11:06:43 +0200 | [diff] [blame] | 133 | nfcb_poll->sensb_res_len = *data++; |
| 134 | |
| 135 | pr_debug("sensb_res_len %d\n", nfcb_poll->sensb_res_len); |
| 136 | |
| 137 | memcpy(nfcb_poll->sensb_res, data, nfcb_poll->sensb_res_len); |
| 138 | data += nfcb_poll->sensb_res_len; |
| 139 | |
| 140 | return data; |
| 141 | } |
| 142 | |
| 143 | static __u8 *nci_extract_rf_params_nfcf_passive_poll(struct nci_dev *ndev, |
Ilan Elias | 019c4fb | 2012-01-18 13:16:14 +0200 | [diff] [blame^] | 144 | struct rf_tech_specific_params_nfcf_poll *nfcf_poll, |
| 145 | __u8 *data) |
Ilan Elias | d5a2ca6 | 2012-01-17 11:06:43 +0200 | [diff] [blame] | 146 | { |
Ilan Elias | d5a2ca6 | 2012-01-17 11:06:43 +0200 | [diff] [blame] | 147 | nfcf_poll->bit_rate = *data++; |
| 148 | nfcf_poll->sensf_res_len = *data++; |
| 149 | |
| 150 | pr_debug("bit_rate %d, sensf_res_len %d\n", |
| 151 | nfcf_poll->bit_rate, nfcf_poll->sensf_res_len); |
| 152 | |
| 153 | memcpy(nfcf_poll->sensf_res, data, nfcf_poll->sensf_res_len); |
| 154 | data += nfcf_poll->sensf_res_len; |
| 155 | |
| 156 | return data; |
| 157 | } |
| 158 | |
Ilan Elias | 019c4fb | 2012-01-18 13:16:14 +0200 | [diff] [blame^] | 159 | static int nci_add_new_protocol(struct nci_dev *ndev, |
| 160 | struct nfc_target *target, |
| 161 | __u8 rf_protocol, |
| 162 | __u8 rf_tech_and_mode, |
| 163 | void *params) |
| 164 | { |
| 165 | struct rf_tech_specific_params_nfca_poll *nfca_poll; |
| 166 | struct rf_tech_specific_params_nfcb_poll *nfcb_poll; |
| 167 | struct rf_tech_specific_params_nfcf_poll *nfcf_poll; |
| 168 | __u32 protocol; |
| 169 | |
| 170 | if (rf_protocol == NCI_RF_PROTOCOL_T2T) |
| 171 | protocol = NFC_PROTO_MIFARE_MASK; |
| 172 | else if (rf_protocol == NCI_RF_PROTOCOL_ISO_DEP) |
| 173 | protocol = NFC_PROTO_ISO14443_MASK; |
| 174 | else if (rf_protocol == NCI_RF_PROTOCOL_T3T) |
| 175 | protocol = NFC_PROTO_FELICA_MASK; |
| 176 | else |
| 177 | protocol = 0; |
| 178 | |
| 179 | if (!(protocol & ndev->poll_prots)) { |
| 180 | pr_err("the target found does not have the desired protocol\n"); |
| 181 | return -EPROTO; |
| 182 | } |
| 183 | |
| 184 | if (rf_tech_and_mode == NCI_NFC_A_PASSIVE_POLL_MODE) { |
| 185 | nfca_poll = (struct rf_tech_specific_params_nfca_poll *)params; |
| 186 | |
| 187 | target->sens_res = nfca_poll->sens_res; |
| 188 | target->sel_res = nfca_poll->sel_res; |
| 189 | target->nfcid1_len = nfca_poll->nfcid1_len; |
| 190 | if (target->nfcid1_len > 0) { |
| 191 | memcpy(target->nfcid1, nfca_poll->nfcid1, |
| 192 | target->nfcid1_len); |
| 193 | } |
| 194 | } else if (rf_tech_and_mode == NCI_NFC_B_PASSIVE_POLL_MODE) { |
| 195 | nfcb_poll = (struct rf_tech_specific_params_nfcb_poll *)params; |
| 196 | |
| 197 | target->sensb_res_len = nfcb_poll->sensb_res_len; |
| 198 | if (target->sensb_res_len > 0) { |
| 199 | memcpy(target->sensb_res, nfcb_poll->sensb_res, |
| 200 | target->sensb_res_len); |
| 201 | } |
| 202 | } else if (rf_tech_and_mode == NCI_NFC_F_PASSIVE_POLL_MODE) { |
| 203 | nfcf_poll = (struct rf_tech_specific_params_nfcf_poll *)params; |
| 204 | |
| 205 | target->sensf_res_len = nfcf_poll->sensf_res_len; |
| 206 | if (target->sensf_res_len > 0) { |
| 207 | memcpy(target->sensf_res, nfcf_poll->sensf_res, |
| 208 | target->sensf_res_len); |
| 209 | } |
| 210 | } else { |
| 211 | pr_err("unsupported rf_tech_and_mode 0x%x\n", rf_tech_and_mode); |
| 212 | return -EPROTO; |
| 213 | } |
| 214 | |
| 215 | target->supported_protocols |= protocol; |
| 216 | |
| 217 | pr_debug("protocol 0x%x\n", protocol); |
| 218 | |
| 219 | return 0; |
| 220 | } |
| 221 | |
| 222 | static void nci_add_new_target(struct nci_dev *ndev, |
| 223 | struct nci_rf_discover_ntf *ntf) |
| 224 | { |
| 225 | struct nfc_target *target; |
| 226 | int i, rc; |
| 227 | |
| 228 | for (i = 0; i < ndev->n_targets; i++) { |
| 229 | target = &ndev->targets[i]; |
| 230 | if (target->idx == ntf->rf_discovery_id) { |
| 231 | /* This target already exists, add the new protocol */ |
| 232 | nci_add_new_protocol(ndev, target, ntf->rf_protocol, |
| 233 | ntf->rf_tech_and_mode, |
| 234 | &ntf->rf_tech_specific_params); |
| 235 | return; |
| 236 | } |
| 237 | } |
| 238 | |
| 239 | /* This is a new target, check if we've enough room */ |
| 240 | if (ndev->n_targets == NCI_MAX_DISCOVERED_TARGETS) { |
| 241 | pr_debug("not enough room, ignoring new target...\n"); |
| 242 | return; |
| 243 | } |
| 244 | |
| 245 | target = &ndev->targets[ndev->n_targets]; |
| 246 | |
| 247 | rc = nci_add_new_protocol(ndev, target, ntf->rf_protocol, |
| 248 | ntf->rf_tech_and_mode, |
| 249 | &ntf->rf_tech_specific_params); |
| 250 | if (!rc) { |
| 251 | target->idx = ntf->rf_discovery_id; |
| 252 | ndev->n_targets++; |
| 253 | |
| 254 | pr_debug("target_idx %d, n_targets %d\n", target->idx, |
| 255 | ndev->n_targets); |
| 256 | } |
| 257 | } |
| 258 | |
| 259 | void nci_clear_target_list(struct nci_dev *ndev) |
| 260 | { |
| 261 | memset(ndev->targets, 0, |
| 262 | (sizeof(struct nfc_target)*NCI_MAX_DISCOVERED_TARGETS)); |
| 263 | |
| 264 | ndev->n_targets = 0; |
| 265 | } |
| 266 | |
| 267 | static void nci_rf_discover_ntf_packet(struct nci_dev *ndev, |
| 268 | struct sk_buff *skb) |
| 269 | { |
| 270 | struct nci_rf_discover_ntf ntf; |
| 271 | __u8 *data = skb->data; |
| 272 | bool add_target = true; |
| 273 | |
| 274 | ntf.rf_discovery_id = *data++; |
| 275 | ntf.rf_protocol = *data++; |
| 276 | ntf.rf_tech_and_mode = *data++; |
| 277 | ntf.rf_tech_specific_params_len = *data++; |
| 278 | |
| 279 | pr_debug("rf_discovery_id %d\n", ntf.rf_discovery_id); |
| 280 | pr_debug("rf_protocol 0x%x\n", ntf.rf_protocol); |
| 281 | pr_debug("rf_tech_and_mode 0x%x\n", ntf.rf_tech_and_mode); |
| 282 | pr_debug("rf_tech_specific_params_len %d\n", |
| 283 | ntf.rf_tech_specific_params_len); |
| 284 | |
| 285 | if (ntf.rf_tech_specific_params_len > 0) { |
| 286 | switch (ntf.rf_tech_and_mode) { |
| 287 | case NCI_NFC_A_PASSIVE_POLL_MODE: |
| 288 | data = nci_extract_rf_params_nfca_passive_poll(ndev, |
| 289 | &(ntf.rf_tech_specific_params.nfca_poll), data); |
| 290 | break; |
| 291 | |
| 292 | case NCI_NFC_B_PASSIVE_POLL_MODE: |
| 293 | data = nci_extract_rf_params_nfcb_passive_poll(ndev, |
| 294 | &(ntf.rf_tech_specific_params.nfcb_poll), data); |
| 295 | break; |
| 296 | |
| 297 | case NCI_NFC_F_PASSIVE_POLL_MODE: |
| 298 | data = nci_extract_rf_params_nfcf_passive_poll(ndev, |
| 299 | &(ntf.rf_tech_specific_params.nfcf_poll), data); |
| 300 | break; |
| 301 | |
| 302 | default: |
| 303 | pr_err("unsupported rf_tech_and_mode 0x%x\n", |
| 304 | ntf.rf_tech_and_mode); |
| 305 | data += ntf.rf_tech_specific_params_len; |
| 306 | add_target = false; |
| 307 | } |
| 308 | } |
| 309 | |
| 310 | ntf.ntf_type = *data++; |
| 311 | pr_debug("ntf_type %d\n", ntf.ntf_type); |
| 312 | |
| 313 | if (add_target == true) |
| 314 | nci_add_new_target(ndev, &ntf); |
| 315 | |
| 316 | if (ntf.ntf_type == NCI_DISCOVER_NTF_TYPE_MORE) { |
| 317 | atomic_set(&ndev->state, NCI_W4_ALL_DISCOVERIES); |
| 318 | } else { |
| 319 | atomic_set(&ndev->state, NCI_W4_HOST_SELECT); |
| 320 | nfc_targets_found(ndev->nfc_dev, ndev->targets, |
| 321 | ndev->n_targets); |
| 322 | } |
| 323 | } |
| 324 | |
Ilan Elias | e8c0dac | 2011-11-09 12:09:14 +0200 | [diff] [blame] | 325 | static int nci_extract_activation_params_iso_dep(struct nci_dev *ndev, |
| 326 | struct nci_rf_intf_activated_ntf *ntf, __u8 *data) |
| 327 | { |
| 328 | struct activation_params_nfca_poll_iso_dep *nfca_poll; |
Ilan Elias | d5a2ca6 | 2012-01-17 11:06:43 +0200 | [diff] [blame] | 329 | struct activation_params_nfcb_poll_iso_dep *nfcb_poll; |
Ilan Elias | e8c0dac | 2011-11-09 12:09:14 +0200 | [diff] [blame] | 330 | |
| 331 | switch (ntf->activation_rf_tech_and_mode) { |
| 332 | case NCI_NFC_A_PASSIVE_POLL_MODE: |
| 333 | nfca_poll = &ntf->activation_params.nfca_poll_iso_dep; |
| 334 | nfca_poll->rats_res_len = *data++; |
Ilan Elias | d5a2ca6 | 2012-01-17 11:06:43 +0200 | [diff] [blame] | 335 | pr_debug("rats_res_len %d\n", nfca_poll->rats_res_len); |
Ilan Elias | e8c0dac | 2011-11-09 12:09:14 +0200 | [diff] [blame] | 336 | if (nfca_poll->rats_res_len > 0) { |
| 337 | memcpy(nfca_poll->rats_res, |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 338 | data, |
Ilan Elias | e8c0dac | 2011-11-09 12:09:14 +0200 | [diff] [blame] | 339 | nfca_poll->rats_res_len); |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 340 | } |
| 341 | break; |
| 342 | |
Ilan Elias | d5a2ca6 | 2012-01-17 11:06:43 +0200 | [diff] [blame] | 343 | case NCI_NFC_B_PASSIVE_POLL_MODE: |
| 344 | nfcb_poll = &ntf->activation_params.nfcb_poll_iso_dep; |
| 345 | nfcb_poll->attrib_res_len = *data++; |
| 346 | pr_debug("attrib_res_len %d\n", |
| 347 | nfcb_poll->attrib_res_len); |
| 348 | if (nfcb_poll->attrib_res_len > 0) { |
| 349 | memcpy(nfcb_poll->attrib_res, |
| 350 | data, |
| 351 | nfcb_poll->attrib_res_len); |
| 352 | } |
| 353 | break; |
| 354 | |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 355 | default: |
Joe Perches | ed1e0ad | 2011-11-29 11:37:32 -0800 | [diff] [blame] | 356 | pr_err("unsupported activation_rf_tech_and_mode 0x%x\n", |
| 357 | ntf->activation_rf_tech_and_mode); |
Ilan Elias | 019c4fb | 2012-01-18 13:16:14 +0200 | [diff] [blame^] | 358 | return NCI_STATUS_RF_PROTOCOL_ERROR; |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 359 | } |
| 360 | |
Ilan Elias | 019c4fb | 2012-01-18 13:16:14 +0200 | [diff] [blame^] | 361 | return NCI_STATUS_OK; |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 362 | } |
| 363 | |
Ilan Elias | 019c4fb | 2012-01-18 13:16:14 +0200 | [diff] [blame^] | 364 | static void nci_target_auto_activated(struct nci_dev *ndev, |
| 365 | struct nci_rf_intf_activated_ntf *ntf) |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 366 | { |
Ilan Elias | 019c4fb | 2012-01-18 13:16:14 +0200 | [diff] [blame^] | 367 | struct nfc_target *target; |
| 368 | int rc; |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 369 | |
Ilan Elias | 019c4fb | 2012-01-18 13:16:14 +0200 | [diff] [blame^] | 370 | target = &ndev->targets[ndev->n_targets]; |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 371 | |
Ilan Elias | 019c4fb | 2012-01-18 13:16:14 +0200 | [diff] [blame^] | 372 | rc = nci_add_new_protocol(ndev, target, ntf->rf_protocol, |
| 373 | ntf->activation_rf_tech_and_mode, |
| 374 | &ntf->rf_tech_specific_params); |
| 375 | if (rc) |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 376 | return; |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 377 | |
Ilan Elias | 019c4fb | 2012-01-18 13:16:14 +0200 | [diff] [blame^] | 378 | target->idx = ntf->rf_discovery_id; |
| 379 | ndev->n_targets++; |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 380 | |
Ilan Elias | 019c4fb | 2012-01-18 13:16:14 +0200 | [diff] [blame^] | 381 | pr_debug("target_idx %d, n_targets %d\n", target->idx, ndev->n_targets); |
Ilan Elias | d5a2ca6 | 2012-01-17 11:06:43 +0200 | [diff] [blame] | 382 | |
Ilan Elias | 019c4fb | 2012-01-18 13:16:14 +0200 | [diff] [blame^] | 383 | nfc_targets_found(ndev->nfc_dev, ndev->targets, ndev->n_targets); |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 384 | } |
| 385 | |
Ilan Elias | e8c0dac | 2011-11-09 12:09:14 +0200 | [diff] [blame] | 386 | static void nci_rf_intf_activated_ntf_packet(struct nci_dev *ndev, |
| 387 | struct sk_buff *skb) |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 388 | { |
Ilan Elias | e8c0dac | 2011-11-09 12:09:14 +0200 | [diff] [blame] | 389 | struct nci_rf_intf_activated_ntf ntf; |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 390 | __u8 *data = skb->data; |
Ilan Elias | 019c4fb | 2012-01-18 13:16:14 +0200 | [diff] [blame^] | 391 | int err = NCI_STATUS_OK; |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 392 | |
Ilan Elias | e8c0dac | 2011-11-09 12:09:14 +0200 | [diff] [blame] | 393 | ntf.rf_discovery_id = *data++; |
Ilan Elias | 637d85a | 2011-12-20 16:57:40 +0200 | [diff] [blame] | 394 | ntf.rf_interface = *data++; |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 395 | ntf.rf_protocol = *data++; |
Ilan Elias | e8c0dac | 2011-11-09 12:09:14 +0200 | [diff] [blame] | 396 | ntf.activation_rf_tech_and_mode = *data++; |
Ilan Elias | 637d85a | 2011-12-20 16:57:40 +0200 | [diff] [blame] | 397 | ntf.max_data_pkt_payload_size = *data++; |
| 398 | ntf.initial_num_credits = *data++; |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 399 | ntf.rf_tech_specific_params_len = *data++; |
| 400 | |
Joe Perches | 20c239c | 2011-11-29 11:37:33 -0800 | [diff] [blame] | 401 | pr_debug("rf_discovery_id %d\n", ntf.rf_discovery_id); |
Ilan Elias | 637d85a | 2011-12-20 16:57:40 +0200 | [diff] [blame] | 402 | pr_debug("rf_interface 0x%x\n", ntf.rf_interface); |
Joe Perches | 20c239c | 2011-11-29 11:37:33 -0800 | [diff] [blame] | 403 | pr_debug("rf_protocol 0x%x\n", ntf.rf_protocol); |
| 404 | pr_debug("activation_rf_tech_and_mode 0x%x\n", |
| 405 | ntf.activation_rf_tech_and_mode); |
Ilan Elias | 637d85a | 2011-12-20 16:57:40 +0200 | [diff] [blame] | 406 | pr_debug("max_data_pkt_payload_size 0x%x\n", |
| 407 | ntf.max_data_pkt_payload_size); |
| 408 | pr_debug("initial_num_credits 0x%x\n", ntf.initial_num_credits); |
Joe Perches | 20c239c | 2011-11-29 11:37:33 -0800 | [diff] [blame] | 409 | pr_debug("rf_tech_specific_params_len %d\n", |
| 410 | ntf.rf_tech_specific_params_len); |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 411 | |
Ilan Elias | e8c0dac | 2011-11-09 12:09:14 +0200 | [diff] [blame] | 412 | if (ntf.rf_tech_specific_params_len > 0) { |
| 413 | switch (ntf.activation_rf_tech_and_mode) { |
| 414 | case NCI_NFC_A_PASSIVE_POLL_MODE: |
| 415 | data = nci_extract_rf_params_nfca_passive_poll(ndev, |
Ilan Elias | 019c4fb | 2012-01-18 13:16:14 +0200 | [diff] [blame^] | 416 | &(ntf.rf_tech_specific_params.nfca_poll), data); |
Ilan Elias | e8c0dac | 2011-11-09 12:09:14 +0200 | [diff] [blame] | 417 | break; |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 418 | |
Ilan Elias | d5a2ca6 | 2012-01-17 11:06:43 +0200 | [diff] [blame] | 419 | case NCI_NFC_B_PASSIVE_POLL_MODE: |
| 420 | data = nci_extract_rf_params_nfcb_passive_poll(ndev, |
Ilan Elias | 019c4fb | 2012-01-18 13:16:14 +0200 | [diff] [blame^] | 421 | &(ntf.rf_tech_specific_params.nfcb_poll), data); |
Ilan Elias | d5a2ca6 | 2012-01-17 11:06:43 +0200 | [diff] [blame] | 422 | break; |
| 423 | |
| 424 | case NCI_NFC_F_PASSIVE_POLL_MODE: |
| 425 | data = nci_extract_rf_params_nfcf_passive_poll(ndev, |
Ilan Elias | 019c4fb | 2012-01-18 13:16:14 +0200 | [diff] [blame^] | 426 | &(ntf.rf_tech_specific_params.nfcf_poll), data); |
Ilan Elias | d5a2ca6 | 2012-01-17 11:06:43 +0200 | [diff] [blame] | 427 | break; |
| 428 | |
Ilan Elias | e8c0dac | 2011-11-09 12:09:14 +0200 | [diff] [blame] | 429 | default: |
Joe Perches | ed1e0ad | 2011-11-29 11:37:32 -0800 | [diff] [blame] | 430 | pr_err("unsupported activation_rf_tech_and_mode 0x%x\n", |
| 431 | ntf.activation_rf_tech_and_mode); |
Ilan Elias | 019c4fb | 2012-01-18 13:16:14 +0200 | [diff] [blame^] | 432 | err = NCI_STATUS_RF_PROTOCOL_ERROR; |
| 433 | goto exit; |
Ilan Elias | e8c0dac | 2011-11-09 12:09:14 +0200 | [diff] [blame] | 434 | } |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 435 | } |
| 436 | |
Ilan Elias | e8c0dac | 2011-11-09 12:09:14 +0200 | [diff] [blame] | 437 | ntf.data_exch_rf_tech_and_mode = *data++; |
| 438 | ntf.data_exch_tx_bit_rate = *data++; |
| 439 | ntf.data_exch_rx_bit_rate = *data++; |
| 440 | ntf.activation_params_len = *data++; |
| 441 | |
Joe Perches | 20c239c | 2011-11-29 11:37:33 -0800 | [diff] [blame] | 442 | pr_debug("data_exch_rf_tech_and_mode 0x%x\n", |
| 443 | ntf.data_exch_rf_tech_and_mode); |
| 444 | pr_debug("data_exch_tx_bit_rate 0x%x\n", |
| 445 | ntf.data_exch_tx_bit_rate); |
| 446 | pr_debug("data_exch_rx_bit_rate 0x%x\n", |
| 447 | ntf.data_exch_rx_bit_rate); |
| 448 | pr_debug("activation_params_len %d\n", |
| 449 | ntf.activation_params_len); |
Ilan Elias | e8c0dac | 2011-11-09 12:09:14 +0200 | [diff] [blame] | 450 | |
| 451 | if (ntf.activation_params_len > 0) { |
Ilan Elias | 637d85a | 2011-12-20 16:57:40 +0200 | [diff] [blame] | 452 | switch (ntf.rf_interface) { |
Ilan Elias | e8c0dac | 2011-11-09 12:09:14 +0200 | [diff] [blame] | 453 | case NCI_RF_INTERFACE_ISO_DEP: |
| 454 | err = nci_extract_activation_params_iso_dep(ndev, |
| 455 | &ntf, data); |
| 456 | break; |
| 457 | |
| 458 | case NCI_RF_INTERFACE_FRAME: |
| 459 | /* no activation params */ |
| 460 | break; |
| 461 | |
| 462 | default: |
Ilan Elias | 637d85a | 2011-12-20 16:57:40 +0200 | [diff] [blame] | 463 | pr_err("unsupported rf_interface 0x%x\n", |
| 464 | ntf.rf_interface); |
Ilan Elias | 019c4fb | 2012-01-18 13:16:14 +0200 | [diff] [blame^] | 465 | err = NCI_STATUS_RF_PROTOCOL_ERROR; |
| 466 | break; |
Ilan Elias | e8c0dac | 2011-11-09 12:09:14 +0200 | [diff] [blame] | 467 | } |
| 468 | } |
| 469 | |
Ilan Elias | 019c4fb | 2012-01-18 13:16:14 +0200 | [diff] [blame^] | 470 | exit: |
| 471 | if (err == NCI_STATUS_OK) { |
| 472 | ndev->max_data_pkt_payload_size = ntf.max_data_pkt_payload_size; |
| 473 | ndev->initial_num_credits = ntf.initial_num_credits; |
| 474 | |
| 475 | /* set the available credits to initial value */ |
| 476 | atomic_set(&ndev->credits_cnt, ndev->initial_num_credits); |
| 477 | } |
| 478 | |
| 479 | if (atomic_read(&ndev->state) == NCI_DISCOVERY) { |
| 480 | /* A single target was found and activated automatically */ |
| 481 | atomic_set(&ndev->state, NCI_POLL_ACTIVE); |
| 482 | if (err == NCI_STATUS_OK) |
| 483 | nci_target_auto_activated(ndev, &ntf); |
| 484 | } else { /* ndev->state == NCI_W4_HOST_SELECT */ |
| 485 | /* A selected target was activated, so complete the request */ |
| 486 | atomic_set(&ndev->state, NCI_POLL_ACTIVE); |
| 487 | nci_req_complete(ndev, err); |
| 488 | } |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 489 | } |
| 490 | |
| 491 | static void nci_rf_deactivate_ntf_packet(struct nci_dev *ndev, |
| 492 | struct sk_buff *skb) |
| 493 | { |
Ilan Elias | e8c0dac | 2011-11-09 12:09:14 +0200 | [diff] [blame] | 494 | struct nci_rf_deactivate_ntf *ntf = (void *) skb->data; |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 495 | |
Joe Perches | 20c239c | 2011-11-29 11:37:33 -0800 | [diff] [blame] | 496 | pr_debug("entry, type 0x%x, reason 0x%x\n", ntf->type, ntf->reason); |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 497 | |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 498 | /* drop tx data queue */ |
| 499 | skb_queue_purge(&ndev->tx_q); |
| 500 | |
| 501 | /* drop partial rx data packet */ |
| 502 | if (ndev->rx_data_reassembly) { |
| 503 | kfree_skb(ndev->rx_data_reassembly); |
| 504 | ndev->rx_data_reassembly = 0; |
| 505 | } |
| 506 | |
| 507 | /* complete the data exchange transaction, if exists */ |
Ilan Elias | 38f04c6 | 2011-09-22 11:36:19 +0300 | [diff] [blame] | 508 | if (test_bit(NCI_DATA_EXCHANGE, &ndev->flags)) |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 509 | nci_data_exchange_complete(ndev, NULL, -EIO); |
Ilan Elias | bd7e01b | 2012-01-08 11:21:53 +0200 | [diff] [blame] | 510 | |
Ilan Elias | 019c4fb | 2012-01-18 13:16:14 +0200 | [diff] [blame^] | 511 | nci_clear_target_list(ndev); |
| 512 | atomic_set(&ndev->state, NCI_IDLE); |
Ilan Elias | bd7e01b | 2012-01-08 11:21:53 +0200 | [diff] [blame] | 513 | nci_req_complete(ndev, NCI_STATUS_OK); |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 514 | } |
| 515 | |
| 516 | void nci_ntf_packet(struct nci_dev *ndev, struct sk_buff *skb) |
| 517 | { |
| 518 | __u16 ntf_opcode = nci_opcode(skb->data); |
| 519 | |
Joe Perches | 20c239c | 2011-11-29 11:37:33 -0800 | [diff] [blame] | 520 | pr_debug("NCI RX: MT=ntf, PBF=%d, GID=0x%x, OID=0x%x, plen=%d\n", |
| 521 | nci_pbf(skb->data), |
| 522 | nci_opcode_gid(ntf_opcode), |
| 523 | nci_opcode_oid(ntf_opcode), |
| 524 | nci_plen(skb->data)); |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 525 | |
| 526 | /* strip the nci control header */ |
| 527 | skb_pull(skb, NCI_CTRL_HDR_SIZE); |
| 528 | |
| 529 | switch (ntf_opcode) { |
| 530 | case NCI_OP_CORE_CONN_CREDITS_NTF: |
| 531 | nci_core_conn_credits_ntf_packet(ndev, skb); |
| 532 | break; |
| 533 | |
Ilan Elias | 019c4fb | 2012-01-18 13:16:14 +0200 | [diff] [blame^] | 534 | case NCI_OP_CORE_GENERIC_ERROR_NTF: |
| 535 | nci_core_generic_error_ntf_packet(ndev, skb); |
| 536 | break; |
| 537 | |
Ilan Elias | 004161c | 2011-12-20 16:57:41 +0200 | [diff] [blame] | 538 | case NCI_OP_CORE_INTF_ERROR_NTF: |
| 539 | nci_core_conn_intf_error_ntf_packet(ndev, skb); |
| 540 | break; |
| 541 | |
Ilan Elias | 019c4fb | 2012-01-18 13:16:14 +0200 | [diff] [blame^] | 542 | case NCI_OP_RF_DISCOVER_NTF: |
| 543 | nci_rf_discover_ntf_packet(ndev, skb); |
| 544 | break; |
| 545 | |
Ilan Elias | e8c0dac | 2011-11-09 12:09:14 +0200 | [diff] [blame] | 546 | case NCI_OP_RF_INTF_ACTIVATED_NTF: |
| 547 | nci_rf_intf_activated_ntf_packet(ndev, skb); |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 548 | break; |
| 549 | |
| 550 | case NCI_OP_RF_DEACTIVATE_NTF: |
| 551 | nci_rf_deactivate_ntf_packet(ndev, skb); |
| 552 | break; |
| 553 | |
| 554 | default: |
Joe Perches | ed1e0ad | 2011-11-29 11:37:32 -0800 | [diff] [blame] | 555 | pr_err("unknown ntf opcode 0x%x\n", ntf_opcode); |
Ilan Elias | 6a2968a | 2011-09-18 11:19:35 +0300 | [diff] [blame] | 556 | break; |
| 557 | } |
| 558 | |
| 559 | kfree_skb(skb); |
| 560 | } |