Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2012 Intel Corporation. All rights reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License as published by |
| 6 | * the Free Software Foundation; either version 2 of the License, or |
| 7 | * (at your option) any later version. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the |
| 16 | * Free Software Foundation, Inc., |
| 17 | * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 18 | */ |
| 19 | |
| 20 | #define pr_fmt(fmt) "hci: %s: " fmt, __func__ |
| 21 | |
| 22 | #include <linux/init.h> |
| 23 | #include <linux/kernel.h> |
| 24 | #include <linux/module.h> |
| 25 | #include <linux/nfc.h> |
| 26 | |
| 27 | #include <net/nfc/nfc.h> |
| 28 | #include <net/nfc/hci.h> |
Eric Lapuyade | 67cccfe | 2012-09-13 17:10:00 +0200 | [diff] [blame] | 29 | #include <net/nfc/llc.h> |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 30 | |
| 31 | #include "hci.h" |
| 32 | |
| 33 | /* Largest headroom needed for outgoing HCI commands */ |
| 34 | #define HCI_CMDS_HEADROOM 1 |
| 35 | |
Eric Lapuyade | 84d4819 | 2012-10-17 16:50:10 +0200 | [diff] [blame] | 36 | int nfc_hci_result_to_errno(u8 result) |
Eric Lapuyade | 6c1c5b9 | 2012-05-03 15:35:25 +0200 | [diff] [blame] | 37 | { |
| 38 | switch (result) { |
| 39 | case NFC_HCI_ANY_OK: |
| 40 | return 0; |
Eric Lapuyade | 23f7e6d | 2012-10-17 16:48:21 +0200 | [diff] [blame] | 41 | case NFC_HCI_ANY_E_REG_PAR_UNKNOWN: |
| 42 | return -EOPNOTSUPP; |
Eric Lapuyade | 6c1c5b9 | 2012-05-03 15:35:25 +0200 | [diff] [blame] | 43 | case NFC_HCI_ANY_E_TIMEOUT: |
| 44 | return -ETIME; |
| 45 | default: |
| 46 | return -1; |
| 47 | } |
| 48 | } |
Eric Lapuyade | 84d4819 | 2012-10-17 16:50:10 +0200 | [diff] [blame] | 49 | EXPORT_SYMBOL(nfc_hci_result_to_errno); |
Eric Lapuyade | 6c1c5b9 | 2012-05-03 15:35:25 +0200 | [diff] [blame] | 50 | |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 51 | static void nfc_hci_msg_tx_work(struct work_struct *work) |
| 52 | { |
| 53 | struct nfc_hci_dev *hdev = container_of(work, struct nfc_hci_dev, |
| 54 | msg_tx_work); |
| 55 | struct hci_msg *msg; |
| 56 | struct sk_buff *skb; |
| 57 | int r = 0; |
| 58 | |
| 59 | mutex_lock(&hdev->msg_tx_mutex); |
Eric Lapuyade | f0c9103 | 2012-11-26 18:06:27 +0100 | [diff] [blame^] | 60 | if (hdev->shutting_down) |
| 61 | goto exit; |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 62 | |
| 63 | if (hdev->cmd_pending_msg) { |
| 64 | if (timer_pending(&hdev->cmd_timer) == 0) { |
| 65 | if (hdev->cmd_pending_msg->cb) |
Eric Lapuyade | b5faa64 | 2012-09-11 10:41:41 +0200 | [diff] [blame] | 66 | hdev->cmd_pending_msg->cb(hdev-> |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 67 | cmd_pending_msg-> |
Eric Lapuyade | b5faa64 | 2012-09-11 10:41:41 +0200 | [diff] [blame] | 68 | cb_context, |
| 69 | NULL, |
| 70 | -ETIME); |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 71 | kfree(hdev->cmd_pending_msg); |
| 72 | hdev->cmd_pending_msg = NULL; |
Szymon Janc | 0f45077 | 2012-10-17 15:23:39 +0200 | [diff] [blame] | 73 | } else { |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 74 | goto exit; |
Szymon Janc | 0f45077 | 2012-10-17 15:23:39 +0200 | [diff] [blame] | 75 | } |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 76 | } |
| 77 | |
| 78 | next_msg: |
| 79 | if (list_empty(&hdev->msg_tx_queue)) |
| 80 | goto exit; |
| 81 | |
| 82 | msg = list_first_entry(&hdev->msg_tx_queue, struct hci_msg, msg_l); |
| 83 | list_del(&msg->msg_l); |
| 84 | |
| 85 | pr_debug("msg_tx_queue has a cmd to send\n"); |
| 86 | while ((skb = skb_dequeue(&msg->msg_frags)) != NULL) { |
Eric Lapuyade | 412fda5 | 2012-09-18 19:45:48 +0200 | [diff] [blame] | 87 | r = nfc_llc_xmit_from_hci(hdev->llc, skb); |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 88 | if (r < 0) { |
| 89 | kfree_skb(skb); |
| 90 | skb_queue_purge(&msg->msg_frags); |
| 91 | if (msg->cb) |
Eric Lapuyade | b5faa64 | 2012-09-11 10:41:41 +0200 | [diff] [blame] | 92 | msg->cb(msg->cb_context, NULL, r); |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 93 | kfree(msg); |
| 94 | break; |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | if (r) |
| 99 | goto next_msg; |
| 100 | |
| 101 | if (msg->wait_response == false) { |
| 102 | kfree(msg); |
| 103 | goto next_msg; |
| 104 | } |
| 105 | |
| 106 | hdev->cmd_pending_msg = msg; |
| 107 | mod_timer(&hdev->cmd_timer, jiffies + |
| 108 | msecs_to_jiffies(hdev->cmd_pending_msg->completion_delay)); |
| 109 | |
| 110 | exit: |
| 111 | mutex_unlock(&hdev->msg_tx_mutex); |
| 112 | } |
| 113 | |
| 114 | static void nfc_hci_msg_rx_work(struct work_struct *work) |
| 115 | { |
| 116 | struct nfc_hci_dev *hdev = container_of(work, struct nfc_hci_dev, |
| 117 | msg_rx_work); |
| 118 | struct sk_buff *skb; |
| 119 | struct hcp_message *message; |
| 120 | u8 pipe; |
| 121 | u8 type; |
| 122 | u8 instruction; |
| 123 | |
| 124 | while ((skb = skb_dequeue(&hdev->msg_rx_queue)) != NULL) { |
| 125 | pipe = skb->data[0]; |
| 126 | skb_pull(skb, NFC_HCI_HCP_PACKET_HEADER_LEN); |
| 127 | message = (struct hcp_message *)skb->data; |
| 128 | type = HCP_MSG_GET_TYPE(message->header); |
| 129 | instruction = HCP_MSG_GET_CMD(message->header); |
| 130 | skb_pull(skb, NFC_HCI_HCP_MESSAGE_HEADER_LEN); |
| 131 | |
| 132 | nfc_hci_hcp_message_rx(hdev, pipe, type, instruction, skb); |
| 133 | } |
| 134 | } |
| 135 | |
Eric Lapuyade | ccca0d6 | 2012-05-03 15:59:37 +0200 | [diff] [blame] | 136 | static void __nfc_hci_cmd_completion(struct nfc_hci_dev *hdev, int err, |
| 137 | struct sk_buff *skb) |
| 138 | { |
| 139 | del_timer_sync(&hdev->cmd_timer); |
| 140 | |
| 141 | if (hdev->cmd_pending_msg->cb) |
Eric Lapuyade | b5faa64 | 2012-09-11 10:41:41 +0200 | [diff] [blame] | 142 | hdev->cmd_pending_msg->cb(hdev->cmd_pending_msg->cb_context, |
| 143 | skb, err); |
Eric Lapuyade | ccca0d6 | 2012-05-03 15:59:37 +0200 | [diff] [blame] | 144 | else |
| 145 | kfree_skb(skb); |
| 146 | |
| 147 | kfree(hdev->cmd_pending_msg); |
| 148 | hdev->cmd_pending_msg = NULL; |
| 149 | |
Linus Torvalds | 916082b | 2012-10-02 16:01:31 -0700 | [diff] [blame] | 150 | schedule_work(&hdev->msg_tx_work); |
Eric Lapuyade | ccca0d6 | 2012-05-03 15:59:37 +0200 | [diff] [blame] | 151 | } |
| 152 | |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 153 | void nfc_hci_resp_received(struct nfc_hci_dev *hdev, u8 result, |
| 154 | struct sk_buff *skb) |
| 155 | { |
| 156 | mutex_lock(&hdev->msg_tx_mutex); |
| 157 | |
| 158 | if (hdev->cmd_pending_msg == NULL) { |
| 159 | kfree_skb(skb); |
| 160 | goto exit; |
| 161 | } |
| 162 | |
Eric Lapuyade | ccca0d6 | 2012-05-03 15:59:37 +0200 | [diff] [blame] | 163 | __nfc_hci_cmd_completion(hdev, nfc_hci_result_to_errno(result), skb); |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 164 | |
| 165 | exit: |
| 166 | mutex_unlock(&hdev->msg_tx_mutex); |
| 167 | } |
| 168 | |
| 169 | void nfc_hci_cmd_received(struct nfc_hci_dev *hdev, u8 pipe, u8 cmd, |
| 170 | struct sk_buff *skb) |
| 171 | { |
| 172 | kfree_skb(skb); |
| 173 | } |
| 174 | |
Eric Lapuyade | 9c5121a | 2012-10-23 11:37:43 +0200 | [diff] [blame] | 175 | u32 nfc_hci_sak_to_protocol(u8 sak) |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 176 | { |
| 177 | switch (NFC_HCI_TYPE_A_SEL_PROT(sak)) { |
| 178 | case NFC_HCI_TYPE_A_SEL_PROT_MIFARE: |
| 179 | return NFC_PROTO_MIFARE_MASK; |
| 180 | case NFC_HCI_TYPE_A_SEL_PROT_ISO14443: |
| 181 | return NFC_PROTO_ISO14443_MASK; |
| 182 | case NFC_HCI_TYPE_A_SEL_PROT_DEP: |
| 183 | return NFC_PROTO_NFC_DEP_MASK; |
| 184 | case NFC_HCI_TYPE_A_SEL_PROT_ISO14443_DEP: |
| 185 | return NFC_PROTO_ISO14443_MASK | NFC_PROTO_NFC_DEP_MASK; |
| 186 | default: |
| 187 | return 0xffffffff; |
| 188 | } |
| 189 | } |
Eric Lapuyade | 9c5121a | 2012-10-23 11:37:43 +0200 | [diff] [blame] | 190 | EXPORT_SYMBOL(nfc_hci_sak_to_protocol); |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 191 | |
Arron Wang | f7a5f6c | 2012-09-27 17:32:55 +0800 | [diff] [blame] | 192 | int nfc_hci_target_discovered(struct nfc_hci_dev *hdev, u8 gate) |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 193 | { |
| 194 | struct nfc_target *targets; |
| 195 | struct sk_buff *atqa_skb = NULL; |
| 196 | struct sk_buff *sak_skb = NULL; |
Eric Lapuyade | 81b3039 | 2012-07-12 20:27:54 +0200 | [diff] [blame] | 197 | struct sk_buff *uid_skb = NULL; |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 198 | int r; |
| 199 | |
| 200 | pr_debug("from gate %d\n", gate); |
| 201 | |
| 202 | targets = kzalloc(sizeof(struct nfc_target), GFP_KERNEL); |
| 203 | if (targets == NULL) |
| 204 | return -ENOMEM; |
| 205 | |
| 206 | switch (gate) { |
| 207 | case NFC_HCI_RF_READER_A_GATE: |
| 208 | r = nfc_hci_get_param(hdev, NFC_HCI_RF_READER_A_GATE, |
| 209 | NFC_HCI_RF_READER_A_ATQA, &atqa_skb); |
| 210 | if (r < 0) |
| 211 | goto exit; |
| 212 | |
| 213 | r = nfc_hci_get_param(hdev, NFC_HCI_RF_READER_A_GATE, |
| 214 | NFC_HCI_RF_READER_A_SAK, &sak_skb); |
| 215 | if (r < 0) |
| 216 | goto exit; |
| 217 | |
| 218 | if (atqa_skb->len != 2 || sak_skb->len != 1) { |
| 219 | r = -EPROTO; |
| 220 | goto exit; |
| 221 | } |
| 222 | |
| 223 | targets->supported_protocols = |
| 224 | nfc_hci_sak_to_protocol(sak_skb->data[0]); |
| 225 | if (targets->supported_protocols == 0xffffffff) { |
| 226 | r = -EPROTO; |
| 227 | goto exit; |
| 228 | } |
| 229 | |
| 230 | targets->sens_res = be16_to_cpu(*(u16 *)atqa_skb->data); |
| 231 | targets->sel_res = sak_skb->data[0]; |
| 232 | |
Eric Lapuyade | 81b3039 | 2012-07-12 20:27:54 +0200 | [diff] [blame] | 233 | r = nfc_hci_get_param(hdev, NFC_HCI_RF_READER_A_GATE, |
| 234 | NFC_HCI_RF_READER_A_UID, &uid_skb); |
| 235 | if (r < 0) |
| 236 | goto exit; |
| 237 | |
| 238 | if (uid_skb->len == 0 || uid_skb->len > NFC_NFCID1_MAXSIZE) { |
| 239 | r = -EPROTO; |
| 240 | goto exit; |
| 241 | } |
| 242 | |
| 243 | memcpy(targets->nfcid1, uid_skb->data, uid_skb->len); |
| 244 | targets->nfcid1_len = uid_skb->len; |
| 245 | |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 246 | if (hdev->ops->complete_target_discovered) { |
| 247 | r = hdev->ops->complete_target_discovered(hdev, gate, |
| 248 | targets); |
| 249 | if (r < 0) |
| 250 | goto exit; |
| 251 | } |
| 252 | break; |
| 253 | case NFC_HCI_RF_READER_B_GATE: |
Samuel Ortiz | 01d719a | 2012-07-04 00:14:04 +0200 | [diff] [blame] | 254 | targets->supported_protocols = NFC_PROTO_ISO14443_B_MASK; |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 255 | break; |
| 256 | default: |
| 257 | if (hdev->ops->target_from_gate) |
| 258 | r = hdev->ops->target_from_gate(hdev, gate, targets); |
| 259 | else |
| 260 | r = -EPROTO; |
| 261 | if (r < 0) |
| 262 | goto exit; |
| 263 | |
| 264 | if (hdev->ops->complete_target_discovered) { |
| 265 | r = hdev->ops->complete_target_discovered(hdev, gate, |
| 266 | targets); |
| 267 | if (r < 0) |
| 268 | goto exit; |
| 269 | } |
| 270 | break; |
| 271 | } |
| 272 | |
Arron Wang | 928326f | 2012-09-27 17:32:56 +0800 | [diff] [blame] | 273 | /* if driver set the new gate, we will skip the old one */ |
| 274 | if (targets->hci_reader_gate == 0x00) |
| 275 | targets->hci_reader_gate = gate; |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 276 | |
| 277 | r = nfc_targets_found(hdev->ndev, targets, 1); |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 278 | |
| 279 | exit: |
| 280 | kfree(targets); |
| 281 | kfree_skb(atqa_skb); |
| 282 | kfree_skb(sak_skb); |
Eric Lapuyade | 81b3039 | 2012-07-12 20:27:54 +0200 | [diff] [blame] | 283 | kfree_skb(uid_skb); |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 284 | |
| 285 | return r; |
| 286 | } |
Arron Wang | f7a5f6c | 2012-09-27 17:32:55 +0800 | [diff] [blame] | 287 | EXPORT_SYMBOL(nfc_hci_target_discovered); |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 288 | |
| 289 | void nfc_hci_event_received(struct nfc_hci_dev *hdev, u8 pipe, u8 event, |
| 290 | struct sk_buff *skb) |
| 291 | { |
| 292 | int r = 0; |
Eric Lapuyade | 74a5b96 | 2012-10-17 16:49:12 +0200 | [diff] [blame] | 293 | u8 gate = nfc_hci_pipe2gate(hdev, pipe); |
| 294 | |
| 295 | if (gate == 0xff) { |
| 296 | pr_err("Discarded event %x to unopened pipe %x\n", event, pipe); |
| 297 | goto exit; |
| 298 | } |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 299 | |
| 300 | switch (event) { |
| 301 | case NFC_HCI_EVT_TARGET_DISCOVERED: |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 302 | if (skb->len < 1) { /* no status data? */ |
| 303 | r = -EPROTO; |
| 304 | goto exit; |
| 305 | } |
| 306 | |
| 307 | if (skb->data[0] == 3) { |
| 308 | /* TODO: Multiple targets in field, none activated |
| 309 | * poll is supposedly stopped, but there is no |
| 310 | * single target to activate, so nothing to report |
| 311 | * up. |
| 312 | * if we need to restart poll, we must save the |
| 313 | * protocols from the initial poll and reuse here. |
| 314 | */ |
| 315 | } |
| 316 | |
| 317 | if (skb->data[0] != 0) { |
| 318 | r = -EPROTO; |
| 319 | goto exit; |
| 320 | } |
| 321 | |
Eric Lapuyade | 74a5b96 | 2012-10-17 16:49:12 +0200 | [diff] [blame] | 322 | r = nfc_hci_target_discovered(hdev, gate); |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 323 | break; |
| 324 | default: |
Arron Wang | f7a5f6c | 2012-09-27 17:32:55 +0800 | [diff] [blame] | 325 | if (hdev->ops->event_received) { |
Eric Lapuyade | 74a5b96 | 2012-10-17 16:49:12 +0200 | [diff] [blame] | 326 | hdev->ops->event_received(hdev, gate, event, skb); |
Arron Wang | f7a5f6c | 2012-09-27 17:32:55 +0800 | [diff] [blame] | 327 | return; |
| 328 | } |
| 329 | |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 330 | break; |
| 331 | } |
| 332 | |
| 333 | exit: |
| 334 | kfree_skb(skb); |
| 335 | |
| 336 | if (r) { |
| 337 | /* TODO: There was an error dispatching the event, |
| 338 | * how to propagate up to nfc core? |
| 339 | */ |
| 340 | } |
| 341 | } |
| 342 | |
| 343 | static void nfc_hci_cmd_timeout(unsigned long data) |
| 344 | { |
| 345 | struct nfc_hci_dev *hdev = (struct nfc_hci_dev *)data; |
| 346 | |
Linus Torvalds | 916082b | 2012-10-02 16:01:31 -0700 | [diff] [blame] | 347 | schedule_work(&hdev->msg_tx_work); |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 348 | } |
| 349 | |
| 350 | static int hci_dev_connect_gates(struct nfc_hci_dev *hdev, u8 gate_count, |
Eric Lapuyade | a10d595 | 2012-06-05 14:42:11 +0200 | [diff] [blame] | 351 | struct nfc_hci_gate *gates) |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 352 | { |
| 353 | int r; |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 354 | while (gate_count--) { |
Eric Lapuyade | a10d595 | 2012-06-05 14:42:11 +0200 | [diff] [blame] | 355 | r = nfc_hci_connect_gate(hdev, NFC_HCI_HOST_CONTROLLER_ID, |
| 356 | gates->gate, gates->pipe); |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 357 | if (r < 0) |
| 358 | return r; |
Eric Lapuyade | a10d595 | 2012-06-05 14:42:11 +0200 | [diff] [blame] | 359 | gates++; |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 360 | } |
| 361 | |
| 362 | return 0; |
| 363 | } |
| 364 | |
| 365 | static int hci_dev_session_init(struct nfc_hci_dev *hdev) |
| 366 | { |
| 367 | struct sk_buff *skb = NULL; |
| 368 | int r; |
Eric Lapuyade | a10d595 | 2012-06-05 14:42:11 +0200 | [diff] [blame] | 369 | |
| 370 | if (hdev->init_data.gates[0].gate != NFC_HCI_ADMIN_GATE) |
| 371 | return -EPROTO; |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 372 | |
| 373 | r = nfc_hci_connect_gate(hdev, NFC_HCI_HOST_CONTROLLER_ID, |
Eric Lapuyade | a10d595 | 2012-06-05 14:42:11 +0200 | [diff] [blame] | 374 | hdev->init_data.gates[0].gate, |
| 375 | hdev->init_data.gates[0].pipe); |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 376 | if (r < 0) |
| 377 | goto exit; |
| 378 | |
| 379 | r = nfc_hci_get_param(hdev, NFC_HCI_ADMIN_GATE, |
| 380 | NFC_HCI_ADMIN_SESSION_IDENTITY, &skb); |
| 381 | if (r < 0) |
| 382 | goto disconnect_all; |
| 383 | |
| 384 | if (skb->len && skb->len == strlen(hdev->init_data.session_id)) |
| 385 | if (memcmp(hdev->init_data.session_id, skb->data, |
| 386 | skb->len) == 0) { |
| 387 | /* TODO ELa: restore gate<->pipe table from |
| 388 | * some TBD location. |
| 389 | * note: it doesn't seem possible to get the chip |
| 390 | * currently open gate/pipe table. |
| 391 | * It is only possible to obtain the supported |
| 392 | * gate list. |
| 393 | */ |
| 394 | |
| 395 | /* goto exit |
| 396 | * For now, always do a full initialization */ |
| 397 | } |
| 398 | |
| 399 | r = nfc_hci_disconnect_all_gates(hdev); |
| 400 | if (r < 0) |
| 401 | goto exit; |
| 402 | |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 403 | r = hci_dev_connect_gates(hdev, hdev->init_data.gate_count, |
| 404 | hdev->init_data.gates); |
| 405 | if (r < 0) |
| 406 | goto disconnect_all; |
| 407 | |
| 408 | r = nfc_hci_set_param(hdev, NFC_HCI_ADMIN_GATE, |
| 409 | NFC_HCI_ADMIN_SESSION_IDENTITY, |
| 410 | hdev->init_data.session_id, |
| 411 | strlen(hdev->init_data.session_id)); |
| 412 | if (r == 0) |
| 413 | goto exit; |
| 414 | |
| 415 | disconnect_all: |
| 416 | nfc_hci_disconnect_all_gates(hdev); |
| 417 | |
| 418 | exit: |
Wei Yongjun | 33e5971 | 2012-08-28 21:02:40 +0800 | [diff] [blame] | 419 | kfree_skb(skb); |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 420 | |
| 421 | return r; |
| 422 | } |
| 423 | |
| 424 | static int hci_dev_version(struct nfc_hci_dev *hdev) |
| 425 | { |
| 426 | int r; |
| 427 | struct sk_buff *skb; |
| 428 | |
| 429 | r = nfc_hci_get_param(hdev, NFC_HCI_ID_MGMT_GATE, |
| 430 | NFC_HCI_ID_MGMT_VERSION_SW, &skb); |
Eric Lapuyade | 23f7e6d | 2012-10-17 16:48:21 +0200 | [diff] [blame] | 431 | if (r == -EOPNOTSUPP) { |
| 432 | pr_info("Software/Hardware info not available\n"); |
| 433 | return 0; |
| 434 | } |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 435 | if (r < 0) |
| 436 | return r; |
| 437 | |
| 438 | if (skb->len != 3) { |
| 439 | kfree_skb(skb); |
| 440 | return -EINVAL; |
| 441 | } |
| 442 | |
| 443 | hdev->sw_romlib = (skb->data[0] & 0xf0) >> 4; |
| 444 | hdev->sw_patch = skb->data[0] & 0x0f; |
| 445 | hdev->sw_flashlib_major = skb->data[1]; |
| 446 | hdev->sw_flashlib_minor = skb->data[2]; |
| 447 | |
| 448 | kfree_skb(skb); |
| 449 | |
| 450 | r = nfc_hci_get_param(hdev, NFC_HCI_ID_MGMT_GATE, |
| 451 | NFC_HCI_ID_MGMT_VERSION_HW, &skb); |
| 452 | if (r < 0) |
| 453 | return r; |
| 454 | |
| 455 | if (skb->len != 3) { |
| 456 | kfree_skb(skb); |
| 457 | return -EINVAL; |
| 458 | } |
| 459 | |
| 460 | hdev->hw_derivative = (skb->data[0] & 0xe0) >> 5; |
| 461 | hdev->hw_version = skb->data[0] & 0x1f; |
| 462 | hdev->hw_mpw = (skb->data[1] & 0xc0) >> 6; |
| 463 | hdev->hw_software = skb->data[1] & 0x3f; |
| 464 | hdev->hw_bsid = skb->data[2]; |
| 465 | |
| 466 | kfree_skb(skb); |
| 467 | |
| 468 | pr_info("SOFTWARE INFO:\n"); |
| 469 | pr_info("RomLib : %d\n", hdev->sw_romlib); |
| 470 | pr_info("Patch : %d\n", hdev->sw_patch); |
| 471 | pr_info("FlashLib Major : %d\n", hdev->sw_flashlib_major); |
| 472 | pr_info("FlashLib Minor : %d\n", hdev->sw_flashlib_minor); |
| 473 | pr_info("HARDWARE INFO:\n"); |
| 474 | pr_info("Derivative : %d\n", hdev->hw_derivative); |
| 475 | pr_info("HW Version : %d\n", hdev->hw_version); |
| 476 | pr_info("#MPW : %d\n", hdev->hw_mpw); |
| 477 | pr_info("Software : %d\n", hdev->hw_software); |
| 478 | pr_info("BSID Version : %d\n", hdev->hw_bsid); |
| 479 | |
| 480 | return 0; |
| 481 | } |
| 482 | |
| 483 | static int hci_dev_up(struct nfc_dev *nfc_dev) |
| 484 | { |
| 485 | struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); |
| 486 | int r = 0; |
| 487 | |
| 488 | if (hdev->ops->open) { |
| 489 | r = hdev->ops->open(hdev); |
| 490 | if (r < 0) |
| 491 | return r; |
| 492 | } |
| 493 | |
Eric Lapuyade | 412fda5 | 2012-09-18 19:45:48 +0200 | [diff] [blame] | 494 | r = nfc_llc_start(hdev->llc); |
| 495 | if (r < 0) |
| 496 | goto exit_close; |
| 497 | |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 498 | r = hci_dev_session_init(hdev); |
| 499 | if (r < 0) |
Eric Lapuyade | 412fda5 | 2012-09-18 19:45:48 +0200 | [diff] [blame] | 500 | goto exit_llc; |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 501 | |
| 502 | r = nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE, |
| 503 | NFC_HCI_EVT_END_OPERATION, NULL, 0); |
| 504 | if (r < 0) |
Eric Lapuyade | 412fda5 | 2012-09-18 19:45:48 +0200 | [diff] [blame] | 505 | goto exit_llc; |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 506 | |
| 507 | if (hdev->ops->hci_ready) { |
| 508 | r = hdev->ops->hci_ready(hdev); |
| 509 | if (r < 0) |
Eric Lapuyade | 412fda5 | 2012-09-18 19:45:48 +0200 | [diff] [blame] | 510 | goto exit_llc; |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 511 | } |
| 512 | |
| 513 | r = hci_dev_version(hdev); |
| 514 | if (r < 0) |
Eric Lapuyade | 412fda5 | 2012-09-18 19:45:48 +0200 | [diff] [blame] | 515 | goto exit_llc; |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 516 | |
Eric Lapuyade | 412fda5 | 2012-09-18 19:45:48 +0200 | [diff] [blame] | 517 | return 0; |
| 518 | |
| 519 | exit_llc: |
| 520 | nfc_llc_stop(hdev->llc); |
| 521 | |
| 522 | exit_close: |
| 523 | if (hdev->ops->close) |
| 524 | hdev->ops->close(hdev); |
| 525 | |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 526 | return r; |
| 527 | } |
| 528 | |
| 529 | static int hci_dev_down(struct nfc_dev *nfc_dev) |
| 530 | { |
| 531 | struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); |
| 532 | |
Eric Lapuyade | 412fda5 | 2012-09-18 19:45:48 +0200 | [diff] [blame] | 533 | nfc_llc_stop(hdev->llc); |
| 534 | |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 535 | if (hdev->ops->close) |
| 536 | hdev->ops->close(hdev); |
| 537 | |
| 538 | memset(hdev->gate2pipe, NFC_HCI_INVALID_PIPE, sizeof(hdev->gate2pipe)); |
| 539 | |
| 540 | return 0; |
| 541 | } |
| 542 | |
Samuel Ortiz | fe7c580 | 2012-05-15 15:57:06 +0200 | [diff] [blame] | 543 | static int hci_start_poll(struct nfc_dev *nfc_dev, |
| 544 | u32 im_protocols, u32 tm_protocols) |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 545 | { |
| 546 | struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 547 | |
| 548 | if (hdev->ops->start_poll) |
Samuel Ortiz | fe7c580 | 2012-05-15 15:57:06 +0200 | [diff] [blame] | 549 | return hdev->ops->start_poll(hdev, im_protocols, tm_protocols); |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 550 | else |
Eric Lapuyade | 03bed29 | 2012-05-07 12:31:31 +0200 | [diff] [blame] | 551 | return nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE, |
Szymon Janc | 0f45077 | 2012-10-17 15:23:39 +0200 | [diff] [blame] | 552 | NFC_HCI_EVT_READER_REQUESTED, |
| 553 | NULL, 0); |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 554 | } |
| 555 | |
| 556 | static void hci_stop_poll(struct nfc_dev *nfc_dev) |
| 557 | { |
| 558 | struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); |
| 559 | |
Eric Lapuyade | 03bed29 | 2012-05-07 12:31:31 +0200 | [diff] [blame] | 560 | nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE, |
| 561 | NFC_HCI_EVT_END_OPERATION, NULL, 0); |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 562 | } |
| 563 | |
Arron Wang | c40d174 | 2012-09-27 17:32:57 +0800 | [diff] [blame] | 564 | static int hci_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target, |
| 565 | __u8 comm_mode, __u8 *gb, size_t gb_len) |
| 566 | { |
| 567 | struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); |
| 568 | |
| 569 | if (hdev->ops->dep_link_up) |
| 570 | return hdev->ops->dep_link_up(hdev, target, comm_mode, |
| 571 | gb, gb_len); |
| 572 | |
| 573 | return 0; |
| 574 | } |
| 575 | |
| 576 | static int hci_dep_link_down(struct nfc_dev *nfc_dev) |
| 577 | { |
| 578 | struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); |
| 579 | |
| 580 | if (hdev->ops->dep_link_down) |
| 581 | return hdev->ops->dep_link_down(hdev); |
| 582 | |
| 583 | return 0; |
| 584 | } |
| 585 | |
Eric Lapuyade | 9009943 | 2012-05-07 12:31:13 +0200 | [diff] [blame] | 586 | static int hci_activate_target(struct nfc_dev *nfc_dev, |
| 587 | struct nfc_target *target, u32 protocol) |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 588 | { |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 589 | return 0; |
| 590 | } |
| 591 | |
Eric Lapuyade | 9009943 | 2012-05-07 12:31:13 +0200 | [diff] [blame] | 592 | static void hci_deactivate_target(struct nfc_dev *nfc_dev, |
| 593 | struct nfc_target *target) |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 594 | { |
| 595 | } |
| 596 | |
Eric Lapuyade | f3e8fb5 | 2012-09-11 10:43:50 +0200 | [diff] [blame] | 597 | #define HCI_CB_TYPE_TRANSCEIVE 1 |
| 598 | |
| 599 | static void hci_transceive_cb(void *context, struct sk_buff *skb, int err) |
| 600 | { |
| 601 | struct nfc_hci_dev *hdev = context; |
| 602 | |
| 603 | switch (hdev->async_cb_type) { |
| 604 | case HCI_CB_TYPE_TRANSCEIVE: |
| 605 | /* |
| 606 | * TODO: Check RF Error indicator to make sure data is valid. |
| 607 | * It seems that HCI cmd can complete without error, but data |
| 608 | * can be invalid if an RF error occured? Ignore for now. |
| 609 | */ |
| 610 | if (err == 0) |
| 611 | skb_trim(skb, skb->len - 1); /* RF Err ind */ |
| 612 | |
| 613 | hdev->async_cb(hdev->async_cb_context, skb, err); |
| 614 | break; |
| 615 | default: |
| 616 | if (err == 0) |
| 617 | kfree_skb(skb); |
| 618 | break; |
| 619 | } |
| 620 | } |
| 621 | |
Samuel Ortiz | be9ae4c | 2012-05-16 15:55:48 +0200 | [diff] [blame] | 622 | static int hci_transceive(struct nfc_dev *nfc_dev, struct nfc_target *target, |
| 623 | struct sk_buff *skb, data_exchange_cb_t cb, |
| 624 | void *cb_context) |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 625 | { |
| 626 | struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); |
| 627 | int r; |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 628 | |
Eric Lapuyade | 9009943 | 2012-05-07 12:31:13 +0200 | [diff] [blame] | 629 | pr_debug("target_idx=%d\n", target->idx); |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 630 | |
| 631 | switch (target->hci_reader_gate) { |
| 632 | case NFC_HCI_RF_READER_A_GATE: |
| 633 | case NFC_HCI_RF_READER_B_GATE: |
Arron Wang | e810762 | 2012-09-27 17:32:58 +0800 | [diff] [blame] | 634 | if (hdev->ops->im_transceive) { |
| 635 | r = hdev->ops->im_transceive(hdev, target, skb, cb, |
Eric Lapuyade | f3e8fb5 | 2012-09-11 10:43:50 +0200 | [diff] [blame] | 636 | cb_context); |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 637 | if (r <= 0) /* handled */ |
| 638 | break; |
| 639 | } |
| 640 | |
| 641 | *skb_push(skb, 1) = 0; /* CTR, see spec:10.2.2.1 */ |
Eric Lapuyade | f3e8fb5 | 2012-09-11 10:43:50 +0200 | [diff] [blame] | 642 | |
| 643 | hdev->async_cb_type = HCI_CB_TYPE_TRANSCEIVE; |
| 644 | hdev->async_cb = cb; |
| 645 | hdev->async_cb_context = cb_context; |
| 646 | |
| 647 | r = nfc_hci_send_cmd_async(hdev, target->hci_reader_gate, |
| 648 | NFC_HCI_WR_XCHG_DATA, skb->data, |
| 649 | skb->len, hci_transceive_cb, hdev); |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 650 | break; |
| 651 | default: |
Arron Wang | e810762 | 2012-09-27 17:32:58 +0800 | [diff] [blame] | 652 | if (hdev->ops->im_transceive) { |
| 653 | r = hdev->ops->im_transceive(hdev, target, skb, cb, |
Eric Lapuyade | f3e8fb5 | 2012-09-11 10:43:50 +0200 | [diff] [blame] | 654 | cb_context); |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 655 | if (r == 1) |
| 656 | r = -ENOTSUPP; |
Szymon Janc | 0f45077 | 2012-10-17 15:23:39 +0200 | [diff] [blame] | 657 | } else { |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 658 | r = -ENOTSUPP; |
Szymon Janc | 0f45077 | 2012-10-17 15:23:39 +0200 | [diff] [blame] | 659 | } |
Eric Lapuyade | f3e8fb5 | 2012-09-11 10:43:50 +0200 | [diff] [blame] | 660 | break; |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 661 | } |
| 662 | |
| 663 | kfree_skb(skb); |
| 664 | |
Eric Lapuyade | f3e8fb5 | 2012-09-11 10:43:50 +0200 | [diff] [blame] | 665 | return r; |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 666 | } |
| 667 | |
Arron Wang | 984d334 | 2012-10-08 14:54:39 +0800 | [diff] [blame] | 668 | static int hci_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb) |
Arron Wang | e810762 | 2012-09-27 17:32:58 +0800 | [diff] [blame] | 669 | { |
| 670 | struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); |
| 671 | |
| 672 | if (hdev->ops->tm_send) |
| 673 | return hdev->ops->tm_send(hdev, skb); |
| 674 | else |
| 675 | return -ENOTSUPP; |
| 676 | } |
| 677 | |
Eric Lapuyade | 1676f75 | 2012-05-07 12:31:16 +0200 | [diff] [blame] | 678 | static int hci_check_presence(struct nfc_dev *nfc_dev, |
| 679 | struct nfc_target *target) |
| 680 | { |
| 681 | struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); |
| 682 | |
| 683 | if (hdev->ops->check_presence) |
| 684 | return hdev->ops->check_presence(hdev, target); |
| 685 | |
| 686 | return 0; |
| 687 | } |
| 688 | |
Eric Lapuyade | 72b06f7 | 2012-06-11 13:36:52 +0200 | [diff] [blame] | 689 | static void nfc_hci_failure(struct nfc_hci_dev *hdev, int err) |
Eric Lapuyade | a9a741a | 2012-04-30 18:21:51 +0200 | [diff] [blame] | 690 | { |
Eric Lapuyade | a070c85 | 2012-06-11 15:06:56 +0200 | [diff] [blame] | 691 | mutex_lock(&hdev->msg_tx_mutex); |
| 692 | |
| 693 | if (hdev->cmd_pending_msg == NULL) { |
| 694 | nfc_driver_failure(hdev->ndev, err); |
| 695 | goto exit; |
| 696 | } |
| 697 | |
| 698 | __nfc_hci_cmd_completion(hdev, err, NULL); |
| 699 | |
| 700 | exit: |
| 701 | mutex_unlock(&hdev->msg_tx_mutex); |
Eric Lapuyade | a9a741a | 2012-04-30 18:21:51 +0200 | [diff] [blame] | 702 | } |
Eric Lapuyade | 72b06f7 | 2012-06-11 13:36:52 +0200 | [diff] [blame] | 703 | |
Eric Lapuyade | 412fda5 | 2012-09-18 19:45:48 +0200 | [diff] [blame] | 704 | static void nfc_hci_llc_failure(struct nfc_hci_dev *hdev, int err) |
Eric Lapuyade | 72b06f7 | 2012-06-11 13:36:52 +0200 | [diff] [blame] | 705 | { |
| 706 | nfc_hci_failure(hdev, err); |
| 707 | } |
Eric Lapuyade | a9a741a | 2012-04-30 18:21:51 +0200 | [diff] [blame] | 708 | |
Eric Lapuyade | 412fda5 | 2012-09-18 19:45:48 +0200 | [diff] [blame] | 709 | static void nfc_hci_recv_from_llc(struct nfc_hci_dev *hdev, struct sk_buff *skb) |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 710 | { |
| 711 | struct hcp_packet *packet; |
| 712 | u8 type; |
| 713 | u8 instruction; |
| 714 | struct sk_buff *hcp_skb; |
| 715 | u8 pipe; |
| 716 | struct sk_buff *frag_skb; |
| 717 | int msg_len; |
| 718 | |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 719 | packet = (struct hcp_packet *)skb->data; |
| 720 | if ((packet->header & ~NFC_HCI_FRAGMENT) == 0) { |
| 721 | skb_queue_tail(&hdev->rx_hcp_frags, skb); |
| 722 | return; |
| 723 | } |
| 724 | |
| 725 | /* it's the last fragment. Does it need re-aggregation? */ |
| 726 | if (skb_queue_len(&hdev->rx_hcp_frags)) { |
| 727 | pipe = packet->header & NFC_HCI_FRAGMENT; |
| 728 | skb_queue_tail(&hdev->rx_hcp_frags, skb); |
| 729 | |
| 730 | msg_len = 0; |
| 731 | skb_queue_walk(&hdev->rx_hcp_frags, frag_skb) { |
| 732 | msg_len += (frag_skb->len - |
| 733 | NFC_HCI_HCP_PACKET_HEADER_LEN); |
| 734 | } |
| 735 | |
| 736 | hcp_skb = nfc_alloc_recv_skb(NFC_HCI_HCP_PACKET_HEADER_LEN + |
| 737 | msg_len, GFP_KERNEL); |
| 738 | if (hcp_skb == NULL) { |
Eric Lapuyade | 72b06f7 | 2012-06-11 13:36:52 +0200 | [diff] [blame] | 739 | nfc_hci_failure(hdev, -ENOMEM); |
| 740 | return; |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 741 | } |
| 742 | |
| 743 | *skb_put(hcp_skb, NFC_HCI_HCP_PACKET_HEADER_LEN) = pipe; |
| 744 | |
| 745 | skb_queue_walk(&hdev->rx_hcp_frags, frag_skb) { |
| 746 | msg_len = frag_skb->len - NFC_HCI_HCP_PACKET_HEADER_LEN; |
| 747 | memcpy(skb_put(hcp_skb, msg_len), |
| 748 | frag_skb->data + NFC_HCI_HCP_PACKET_HEADER_LEN, |
| 749 | msg_len); |
| 750 | } |
| 751 | |
| 752 | skb_queue_purge(&hdev->rx_hcp_frags); |
| 753 | } else { |
| 754 | packet->header &= NFC_HCI_FRAGMENT; |
| 755 | hcp_skb = skb; |
| 756 | } |
| 757 | |
| 758 | /* if this is a response, dispatch immediately to |
| 759 | * unblock waiting cmd context. Otherwise, enqueue to dispatch |
| 760 | * in separate context where handler can also execute command. |
| 761 | */ |
| 762 | packet = (struct hcp_packet *)hcp_skb->data; |
| 763 | type = HCP_MSG_GET_TYPE(packet->message.header); |
| 764 | if (type == NFC_HCI_HCP_RESPONSE) { |
| 765 | pipe = packet->header; |
| 766 | instruction = HCP_MSG_GET_CMD(packet->message.header); |
| 767 | skb_pull(hcp_skb, NFC_HCI_HCP_PACKET_HEADER_LEN + |
| 768 | NFC_HCI_HCP_MESSAGE_HEADER_LEN); |
| 769 | nfc_hci_hcp_message_rx(hdev, pipe, type, instruction, hcp_skb); |
| 770 | } else { |
| 771 | skb_queue_tail(&hdev->msg_rx_queue, hcp_skb); |
Linus Torvalds | 916082b | 2012-10-02 16:01:31 -0700 | [diff] [blame] | 772 | schedule_work(&hdev->msg_rx_work); |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 773 | } |
| 774 | } |
Eric Lapuyade | 412fda5 | 2012-09-18 19:45:48 +0200 | [diff] [blame] | 775 | |
| 776 | static struct nfc_ops hci_nfc_ops = { |
| 777 | .dev_up = hci_dev_up, |
| 778 | .dev_down = hci_dev_down, |
| 779 | .start_poll = hci_start_poll, |
| 780 | .stop_poll = hci_stop_poll, |
Arron Wang | c40d174 | 2012-09-27 17:32:57 +0800 | [diff] [blame] | 781 | .dep_link_up = hci_dep_link_up, |
| 782 | .dep_link_down = hci_dep_link_down, |
Eric Lapuyade | 412fda5 | 2012-09-18 19:45:48 +0200 | [diff] [blame] | 783 | .activate_target = hci_activate_target, |
| 784 | .deactivate_target = hci_deactivate_target, |
| 785 | .im_transceive = hci_transceive, |
Arron Wang | e810762 | 2012-09-27 17:32:58 +0800 | [diff] [blame] | 786 | .tm_send = hci_tm_send, |
Eric Lapuyade | 412fda5 | 2012-09-18 19:45:48 +0200 | [diff] [blame] | 787 | .check_presence = hci_check_presence, |
| 788 | }; |
| 789 | |
| 790 | struct nfc_hci_dev *nfc_hci_allocate_device(struct nfc_hci_ops *ops, |
| 791 | struct nfc_hci_init_data *init_data, |
| 792 | u32 protocols, |
| 793 | const char *llc_name, |
| 794 | int tx_headroom, |
| 795 | int tx_tailroom, |
| 796 | int max_link_payload) |
| 797 | { |
| 798 | struct nfc_hci_dev *hdev; |
| 799 | |
| 800 | if (ops->xmit == NULL) |
| 801 | return NULL; |
| 802 | |
| 803 | if (protocols == 0) |
| 804 | return NULL; |
| 805 | |
| 806 | hdev = kzalloc(sizeof(struct nfc_hci_dev), GFP_KERNEL); |
| 807 | if (hdev == NULL) |
| 808 | return NULL; |
| 809 | |
| 810 | hdev->llc = nfc_llc_allocate(llc_name, hdev, ops->xmit, |
| 811 | nfc_hci_recv_from_llc, tx_headroom, |
| 812 | tx_tailroom, nfc_hci_llc_failure); |
| 813 | if (hdev->llc == NULL) { |
| 814 | kfree(hdev); |
| 815 | return NULL; |
| 816 | } |
| 817 | |
| 818 | hdev->ndev = nfc_allocate_device(&hci_nfc_ops, protocols, |
| 819 | tx_headroom + HCI_CMDS_HEADROOM, |
| 820 | tx_tailroom); |
| 821 | if (!hdev->ndev) { |
| 822 | nfc_llc_free(hdev->llc); |
| 823 | kfree(hdev); |
| 824 | return NULL; |
| 825 | } |
| 826 | |
| 827 | hdev->ops = ops; |
| 828 | hdev->max_data_link_payload = max_link_payload; |
| 829 | hdev->init_data = *init_data; |
| 830 | |
| 831 | nfc_set_drvdata(hdev->ndev, hdev); |
| 832 | |
| 833 | memset(hdev->gate2pipe, NFC_HCI_INVALID_PIPE, sizeof(hdev->gate2pipe)); |
| 834 | |
| 835 | return hdev; |
| 836 | } |
| 837 | EXPORT_SYMBOL(nfc_hci_allocate_device); |
| 838 | |
| 839 | void nfc_hci_free_device(struct nfc_hci_dev *hdev) |
| 840 | { |
| 841 | nfc_free_device(hdev->ndev); |
| 842 | nfc_llc_free(hdev->llc); |
| 843 | kfree(hdev); |
| 844 | } |
| 845 | EXPORT_SYMBOL(nfc_hci_free_device); |
| 846 | |
| 847 | int nfc_hci_register_device(struct nfc_hci_dev *hdev) |
| 848 | { |
| 849 | mutex_init(&hdev->msg_tx_mutex); |
| 850 | |
| 851 | INIT_LIST_HEAD(&hdev->msg_tx_queue); |
| 852 | |
| 853 | INIT_WORK(&hdev->msg_tx_work, nfc_hci_msg_tx_work); |
| 854 | |
| 855 | init_timer(&hdev->cmd_timer); |
| 856 | hdev->cmd_timer.data = (unsigned long)hdev; |
| 857 | hdev->cmd_timer.function = nfc_hci_cmd_timeout; |
| 858 | |
| 859 | skb_queue_head_init(&hdev->rx_hcp_frags); |
| 860 | |
| 861 | INIT_WORK(&hdev->msg_rx_work, nfc_hci_msg_rx_work); |
| 862 | |
| 863 | skb_queue_head_init(&hdev->msg_rx_queue); |
| 864 | |
| 865 | return nfc_register_device(hdev->ndev); |
| 866 | } |
| 867 | EXPORT_SYMBOL(nfc_hci_register_device); |
| 868 | |
| 869 | void nfc_hci_unregister_device(struct nfc_hci_dev *hdev) |
| 870 | { |
| 871 | struct hci_msg *msg, *n; |
| 872 | |
Eric Lapuyade | f0c9103 | 2012-11-26 18:06:27 +0100 | [diff] [blame^] | 873 | mutex_lock(&hdev->msg_tx_mutex); |
| 874 | |
| 875 | if (hdev->cmd_pending_msg) { |
| 876 | if (hdev->cmd_pending_msg->cb) |
| 877 | hdev->cmd_pending_msg->cb( |
| 878 | hdev->cmd_pending_msg->cb_context, |
| 879 | NULL, -ESHUTDOWN); |
| 880 | kfree(hdev->cmd_pending_msg); |
| 881 | hdev->cmd_pending_msg = NULL; |
| 882 | } |
| 883 | |
| 884 | hdev->shutting_down = true; |
| 885 | |
| 886 | mutex_unlock(&hdev->msg_tx_mutex); |
| 887 | |
| 888 | del_timer_sync(&hdev->cmd_timer); |
| 889 | cancel_work_sync(&hdev->msg_tx_work); |
| 890 | |
| 891 | cancel_work_sync(&hdev->msg_rx_work); |
| 892 | |
| 893 | nfc_unregister_device(hdev->ndev); |
| 894 | |
Eric Lapuyade | 412fda5 | 2012-09-18 19:45:48 +0200 | [diff] [blame] | 895 | skb_queue_purge(&hdev->rx_hcp_frags); |
| 896 | skb_queue_purge(&hdev->msg_rx_queue); |
| 897 | |
| 898 | list_for_each_entry_safe(msg, n, &hdev->msg_tx_queue, msg_l) { |
| 899 | list_del(&msg->msg_l); |
| 900 | skb_queue_purge(&msg->msg_frags); |
| 901 | kfree(msg); |
| 902 | } |
Eric Lapuyade | 412fda5 | 2012-09-18 19:45:48 +0200 | [diff] [blame] | 903 | } |
| 904 | EXPORT_SYMBOL(nfc_hci_unregister_device); |
| 905 | |
| 906 | void nfc_hci_set_clientdata(struct nfc_hci_dev *hdev, void *clientdata) |
| 907 | { |
| 908 | hdev->clientdata = clientdata; |
| 909 | } |
| 910 | EXPORT_SYMBOL(nfc_hci_set_clientdata); |
| 911 | |
| 912 | void *nfc_hci_get_clientdata(struct nfc_hci_dev *hdev) |
| 913 | { |
| 914 | return hdev->clientdata; |
| 915 | } |
| 916 | EXPORT_SYMBOL(nfc_hci_get_clientdata); |
| 917 | |
| 918 | void nfc_hci_driver_failure(struct nfc_hci_dev *hdev, int err) |
| 919 | { |
| 920 | nfc_hci_failure(hdev, err); |
| 921 | } |
| 922 | EXPORT_SYMBOL(nfc_hci_driver_failure); |
| 923 | |
Szymon Janc | 0f45077 | 2012-10-17 15:23:39 +0200 | [diff] [blame] | 924 | void nfc_hci_recv_frame(struct nfc_hci_dev *hdev, struct sk_buff *skb) |
Eric Lapuyade | 412fda5 | 2012-09-18 19:45:48 +0200 | [diff] [blame] | 925 | { |
| 926 | nfc_llc_rcv_from_drv(hdev->llc, skb); |
| 927 | } |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 928 | EXPORT_SYMBOL(nfc_hci_recv_frame); |
| 929 | |
Eric Lapuyade | 67cccfe | 2012-09-13 17:10:00 +0200 | [diff] [blame] | 930 | static int __init nfc_hci_init(void) |
| 931 | { |
| 932 | return nfc_llc_init(); |
| 933 | } |
| 934 | |
| 935 | static void __exit nfc_hci_exit(void) |
| 936 | { |
| 937 | nfc_llc_exit(); |
| 938 | } |
| 939 | |
Eric Lapuyade | 412fda5 | 2012-09-18 19:45:48 +0200 | [diff] [blame] | 940 | subsys_initcall(nfc_hci_init); |
Eric Lapuyade | 67cccfe | 2012-09-13 17:10:00 +0200 | [diff] [blame] | 941 | module_exit(nfc_hci_exit); |
| 942 | |
Eric Lapuyade | 8b8d2e0 | 2012-04-10 19:43:06 +0200 | [diff] [blame] | 943 | MODULE_LICENSE("GPL"); |
Eric Lapuyade | 80faa59 | 2012-09-18 19:25:38 +0200 | [diff] [blame] | 944 | MODULE_DESCRIPTION("NFC HCI Core"); |