Samuel Ortiz | 59fcd7c | 2013-04-11 03:03:29 +0200 | [diff] [blame] | 1 | /* |
| 2 | * |
| 3 | * Intel Management Engine Interface (Intel MEI) Linux driver |
| 4 | * Copyright (c) 2003-2013, Intel Corporation. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms and conditions of the GNU General Public License, |
| 8 | * version 2, as published by the Free Software Foundation. |
| 9 | * |
| 10 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 13 | * more details. |
| 14 | * |
| 15 | */ |
| 16 | |
| 17 | #include <linux/kernel.h> |
Samuel Ortiz | 36eda94 | 2013-04-11 03:03:31 +0200 | [diff] [blame] | 18 | #include <linux/sched.h> |
Samuel Ortiz | 59fcd7c | 2013-04-11 03:03:29 +0200 | [diff] [blame] | 19 | #include <linux/module.h> |
| 20 | #include <linux/moduleparam.h> |
| 21 | #include <linux/device.h> |
| 22 | #include <linux/pci.h> |
| 23 | #include <linux/mei_cl_bus.h> |
| 24 | |
| 25 | #include "mei_dev.h" |
| 26 | #include "client.h" |
| 27 | |
| 28 | struct mei_nfc_cmd { |
| 29 | u8 command; |
| 30 | u8 status; |
| 31 | u16 req_id; |
| 32 | u32 reserved; |
| 33 | u16 data_size; |
| 34 | u8 sub_command; |
| 35 | u8 data[]; |
| 36 | } __packed; |
| 37 | |
| 38 | struct mei_nfc_reply { |
| 39 | u8 command; |
| 40 | u8 status; |
| 41 | u16 req_id; |
| 42 | u32 reserved; |
| 43 | u16 data_size; |
| 44 | u8 sub_command; |
| 45 | u8 reply_status; |
| 46 | u8 data[]; |
| 47 | } __packed; |
| 48 | |
| 49 | struct mei_nfc_if_version { |
| 50 | u8 radio_version_sw[3]; |
| 51 | u8 reserved[3]; |
| 52 | u8 radio_version_hw[3]; |
| 53 | u8 i2c_addr; |
| 54 | u8 fw_ivn; |
| 55 | u8 vendor_id; |
| 56 | u8 radio_type; |
| 57 | } __packed; |
| 58 | |
| 59 | struct mei_nfc_connect { |
| 60 | u8 fw_ivn; |
| 61 | u8 vendor_id; |
| 62 | } __packed; |
| 63 | |
| 64 | struct mei_nfc_connect_resp { |
| 65 | u8 fw_ivn; |
| 66 | u8 vendor_id; |
| 67 | u16 me_major; |
| 68 | u16 me_minor; |
| 69 | u16 me_hotfix; |
| 70 | u16 me_build; |
| 71 | } __packed; |
| 72 | |
| 73 | struct mei_nfc_hci_hdr { |
| 74 | u8 cmd; |
| 75 | u8 status; |
| 76 | u16 req_id; |
| 77 | u32 reserved; |
| 78 | u16 data_size; |
| 79 | } __packed; |
| 80 | |
| 81 | #define MEI_NFC_CMD_MAINTENANCE 0x00 |
| 82 | #define MEI_NFC_CMD_HCI_SEND 0x01 |
| 83 | #define MEI_NFC_CMD_HCI_RECV 0x02 |
| 84 | |
| 85 | #define MEI_NFC_SUBCMD_CONNECT 0x00 |
| 86 | #define MEI_NFC_SUBCMD_IF_VERSION 0x01 |
| 87 | |
| 88 | #define MEI_NFC_HEADER_SIZE 10 |
| 89 | |
| 90 | /** mei_nfc_dev - NFC mei device |
| 91 | * |
| 92 | * @cl: NFC host client |
| 93 | * @cl_info: NFC info host client |
| 94 | * @init_work: perform connection to the info client |
| 95 | * @fw_ivn: NFC Intervace Version Number |
| 96 | * @vendor_id: NFC manufacturer ID |
| 97 | * @radio_type: NFC radio type |
| 98 | */ |
| 99 | struct mei_nfc_dev { |
| 100 | struct mei_cl *cl; |
| 101 | struct mei_cl *cl_info; |
| 102 | struct work_struct init_work; |
Samuel Ortiz | 36eda94 | 2013-04-11 03:03:31 +0200 | [diff] [blame] | 103 | wait_queue_head_t send_wq; |
Samuel Ortiz | 59fcd7c | 2013-04-11 03:03:29 +0200 | [diff] [blame] | 104 | u8 fw_ivn; |
| 105 | u8 vendor_id; |
| 106 | u8 radio_type; |
Samuel Ortiz | 91a6b95 | 2013-04-11 03:03:30 +0200 | [diff] [blame] | 107 | char *bus_name; |
Samuel Ortiz | 36eda94 | 2013-04-11 03:03:31 +0200 | [diff] [blame] | 108 | |
| 109 | u16 req_id; |
| 110 | u16 recv_req_id; |
Samuel Ortiz | 59fcd7c | 2013-04-11 03:03:29 +0200 | [diff] [blame] | 111 | }; |
| 112 | |
| 113 | static struct mei_nfc_dev nfc_dev; |
| 114 | |
| 115 | /* UUIDs for NFC F/W clients */ |
| 116 | const uuid_le mei_nfc_guid = UUID_LE(0x0bb17a78, 0x2a8e, 0x4c50, |
| 117 | 0x94, 0xd4, 0x50, 0x26, |
| 118 | 0x67, 0x23, 0x77, 0x5c); |
| 119 | |
| 120 | static const uuid_le mei_nfc_info_guid = UUID_LE(0xd2de1625, 0x382d, 0x417d, |
| 121 | 0x48, 0xa4, 0xef, 0xab, |
| 122 | 0xba, 0x8a, 0x12, 0x06); |
| 123 | |
Samuel Ortiz | 91a6b95 | 2013-04-11 03:03:30 +0200 | [diff] [blame] | 124 | /* Vendors */ |
| 125 | #define MEI_NFC_VENDOR_INSIDE 0x00 |
| 126 | #define MEI_NFC_VENDOR_NXP 0x01 |
| 127 | |
| 128 | /* Radio types */ |
| 129 | #define MEI_NFC_VENDOR_INSIDE_UREAD 0x00 |
| 130 | #define MEI_NFC_VENDOR_NXP_PN544 0x01 |
| 131 | |
Samuel Ortiz | 59fcd7c | 2013-04-11 03:03:29 +0200 | [diff] [blame] | 132 | static void mei_nfc_free(struct mei_nfc_dev *ndev) |
| 133 | { |
| 134 | if (ndev->cl) { |
| 135 | list_del(&ndev->cl->device_link); |
| 136 | mei_cl_unlink(ndev->cl); |
| 137 | kfree(ndev->cl); |
| 138 | } |
| 139 | |
| 140 | if (ndev->cl_info) { |
| 141 | list_del(&ndev->cl_info->device_link); |
| 142 | mei_cl_unlink(ndev->cl_info); |
| 143 | kfree(ndev->cl_info); |
| 144 | } |
Tomas Winkler | 2753ff5 | 2013-06-10 10:10:26 +0300 | [diff] [blame] | 145 | |
| 146 | memset(ndev, 0, sizeof(struct mei_nfc_dev)); |
Samuel Ortiz | 59fcd7c | 2013-04-11 03:03:29 +0200 | [diff] [blame] | 147 | } |
| 148 | |
Samuel Ortiz | 91a6b95 | 2013-04-11 03:03:30 +0200 | [diff] [blame] | 149 | static int mei_nfc_build_bus_name(struct mei_nfc_dev *ndev) |
| 150 | { |
| 151 | struct mei_device *dev; |
| 152 | |
| 153 | if (!ndev->cl) |
| 154 | return -ENODEV; |
| 155 | |
| 156 | dev = ndev->cl->dev; |
| 157 | |
| 158 | switch (ndev->vendor_id) { |
| 159 | case MEI_NFC_VENDOR_INSIDE: |
| 160 | switch (ndev->radio_type) { |
| 161 | case MEI_NFC_VENDOR_INSIDE_UREAD: |
| 162 | ndev->bus_name = "microread"; |
| 163 | return 0; |
| 164 | |
| 165 | default: |
| 166 | dev_err(&dev->pdev->dev, "Unknow radio type 0x%x\n", |
| 167 | ndev->radio_type); |
| 168 | |
| 169 | return -EINVAL; |
| 170 | } |
| 171 | |
| 172 | case MEI_NFC_VENDOR_NXP: |
| 173 | switch (ndev->radio_type) { |
| 174 | case MEI_NFC_VENDOR_NXP_PN544: |
| 175 | ndev->bus_name = "pn544"; |
| 176 | return 0; |
| 177 | default: |
| 178 | dev_err(&dev->pdev->dev, "Unknow radio type 0x%x\n", |
| 179 | ndev->radio_type); |
| 180 | |
| 181 | return -EINVAL; |
| 182 | } |
| 183 | |
| 184 | default: |
| 185 | dev_err(&dev->pdev->dev, "Unknow vendor ID 0x%x\n", |
| 186 | ndev->vendor_id); |
| 187 | |
| 188 | return -EINVAL; |
| 189 | } |
| 190 | |
| 191 | return 0; |
| 192 | } |
| 193 | |
Samuel Ortiz | 36eda94 | 2013-04-11 03:03:31 +0200 | [diff] [blame] | 194 | static int mei_nfc_connect(struct mei_nfc_dev *ndev) |
| 195 | { |
| 196 | struct mei_device *dev; |
| 197 | struct mei_cl *cl; |
| 198 | struct mei_nfc_cmd *cmd, *reply; |
| 199 | struct mei_nfc_connect *connect; |
| 200 | struct mei_nfc_connect_resp *connect_resp; |
| 201 | size_t connect_length, connect_resp_length; |
| 202 | int bytes_recv, ret; |
| 203 | |
| 204 | cl = ndev->cl; |
| 205 | dev = cl->dev; |
| 206 | |
| 207 | connect_length = sizeof(struct mei_nfc_cmd) + |
| 208 | sizeof(struct mei_nfc_connect); |
| 209 | |
| 210 | connect_resp_length = sizeof(struct mei_nfc_cmd) + |
| 211 | sizeof(struct mei_nfc_connect_resp); |
| 212 | |
| 213 | cmd = kzalloc(connect_length, GFP_KERNEL); |
| 214 | if (!cmd) |
| 215 | return -ENOMEM; |
| 216 | connect = (struct mei_nfc_connect *)cmd->data; |
| 217 | |
| 218 | reply = kzalloc(connect_resp_length, GFP_KERNEL); |
| 219 | if (!reply) { |
| 220 | kfree(cmd); |
| 221 | return -ENOMEM; |
| 222 | } |
| 223 | |
| 224 | connect_resp = (struct mei_nfc_connect_resp *)reply->data; |
| 225 | |
| 226 | cmd->command = MEI_NFC_CMD_MAINTENANCE; |
| 227 | cmd->data_size = 3; |
| 228 | cmd->sub_command = MEI_NFC_SUBCMD_CONNECT; |
| 229 | connect->fw_ivn = ndev->fw_ivn; |
| 230 | connect->vendor_id = ndev->vendor_id; |
| 231 | |
| 232 | ret = __mei_cl_send(cl, (u8 *)cmd, connect_length); |
| 233 | if (ret < 0) { |
| 234 | dev_err(&dev->pdev->dev, "Could not send connect cmd\n"); |
| 235 | goto err; |
| 236 | } |
| 237 | |
| 238 | bytes_recv = __mei_cl_recv(cl, (u8 *)reply, connect_resp_length); |
| 239 | if (bytes_recv < 0) { |
| 240 | dev_err(&dev->pdev->dev, "Could not read connect response\n"); |
| 241 | ret = bytes_recv; |
| 242 | goto err; |
| 243 | } |
| 244 | |
| 245 | dev_info(&dev->pdev->dev, "IVN 0x%x Vendor ID 0x%x\n", |
| 246 | connect_resp->fw_ivn, connect_resp->vendor_id); |
| 247 | |
| 248 | dev_info(&dev->pdev->dev, "ME FW %d.%d.%d.%d\n", |
| 249 | connect_resp->me_major, connect_resp->me_minor, |
| 250 | connect_resp->me_hotfix, connect_resp->me_build); |
| 251 | |
| 252 | ret = 0; |
| 253 | |
| 254 | err: |
| 255 | kfree(reply); |
| 256 | kfree(cmd); |
| 257 | |
| 258 | return ret; |
| 259 | } |
| 260 | |
Samuel Ortiz | 59fcd7c | 2013-04-11 03:03:29 +0200 | [diff] [blame] | 261 | static int mei_nfc_if_version(struct mei_nfc_dev *ndev) |
| 262 | { |
| 263 | struct mei_device *dev; |
| 264 | struct mei_cl *cl; |
| 265 | |
| 266 | struct mei_nfc_cmd cmd; |
| 267 | struct mei_nfc_reply *reply = NULL; |
| 268 | struct mei_nfc_if_version *version; |
| 269 | size_t if_version_length; |
| 270 | int bytes_recv, ret; |
| 271 | |
| 272 | cl = ndev->cl_info; |
| 273 | dev = cl->dev; |
| 274 | |
| 275 | memset(&cmd, 0, sizeof(struct mei_nfc_cmd)); |
| 276 | cmd.command = MEI_NFC_CMD_MAINTENANCE; |
| 277 | cmd.data_size = 1; |
| 278 | cmd.sub_command = MEI_NFC_SUBCMD_IF_VERSION; |
| 279 | |
| 280 | ret = __mei_cl_send(cl, (u8 *)&cmd, sizeof(struct mei_nfc_cmd)); |
| 281 | if (ret < 0) { |
| 282 | dev_err(&dev->pdev->dev, "Could not send IF version cmd\n"); |
| 283 | return ret; |
| 284 | } |
| 285 | |
| 286 | /* to be sure on the stack we alloc memory */ |
| 287 | if_version_length = sizeof(struct mei_nfc_reply) + |
| 288 | sizeof(struct mei_nfc_if_version); |
| 289 | |
| 290 | reply = kzalloc(if_version_length, GFP_KERNEL); |
| 291 | if (!reply) |
| 292 | return -ENOMEM; |
| 293 | |
| 294 | bytes_recv = __mei_cl_recv(cl, (u8 *)reply, if_version_length); |
| 295 | if (bytes_recv < 0 || bytes_recv < sizeof(struct mei_nfc_reply)) { |
| 296 | dev_err(&dev->pdev->dev, "Could not read IF version\n"); |
| 297 | ret = -EIO; |
| 298 | goto err; |
| 299 | } |
| 300 | |
| 301 | version = (struct mei_nfc_if_version *)reply->data; |
| 302 | |
| 303 | ndev->fw_ivn = version->fw_ivn; |
| 304 | ndev->vendor_id = version->vendor_id; |
| 305 | ndev->radio_type = version->radio_type; |
| 306 | |
| 307 | err: |
| 308 | kfree(reply); |
| 309 | return ret; |
| 310 | } |
| 311 | |
Samuel Ortiz | 36eda94 | 2013-04-11 03:03:31 +0200 | [diff] [blame] | 312 | static int mei_nfc_enable(struct mei_cl_device *cldev) |
| 313 | { |
| 314 | struct mei_device *dev; |
| 315 | struct mei_nfc_dev *ndev = &nfc_dev; |
| 316 | int ret; |
| 317 | |
| 318 | dev = ndev->cl->dev; |
| 319 | |
| 320 | ret = mei_nfc_connect(ndev); |
| 321 | if (ret < 0) { |
| 322 | dev_err(&dev->pdev->dev, "Could not connect to NFC"); |
| 323 | return ret; |
| 324 | } |
| 325 | |
| 326 | return 0; |
| 327 | } |
| 328 | |
| 329 | static int mei_nfc_disable(struct mei_cl_device *cldev) |
| 330 | { |
| 331 | return 0; |
| 332 | } |
| 333 | |
| 334 | static int mei_nfc_send(struct mei_cl_device *cldev, u8 *buf, size_t length) |
| 335 | { |
| 336 | struct mei_device *dev; |
| 337 | struct mei_nfc_dev *ndev; |
| 338 | struct mei_nfc_hci_hdr *hdr; |
| 339 | u8 *mei_buf; |
| 340 | int err; |
| 341 | |
| 342 | ndev = (struct mei_nfc_dev *) cldev->priv_data; |
| 343 | dev = ndev->cl->dev; |
| 344 | |
| 345 | mei_buf = kzalloc(length + MEI_NFC_HEADER_SIZE, GFP_KERNEL); |
| 346 | if (!mei_buf) |
| 347 | return -ENOMEM; |
| 348 | |
| 349 | hdr = (struct mei_nfc_hci_hdr *) mei_buf; |
| 350 | hdr->cmd = MEI_NFC_CMD_HCI_SEND; |
| 351 | hdr->status = 0; |
| 352 | hdr->req_id = ndev->req_id; |
| 353 | hdr->reserved = 0; |
| 354 | hdr->data_size = length; |
| 355 | |
| 356 | memcpy(mei_buf + MEI_NFC_HEADER_SIZE, buf, length); |
| 357 | |
| 358 | err = __mei_cl_send(ndev->cl, mei_buf, length + MEI_NFC_HEADER_SIZE); |
| 359 | if (err < 0) |
| 360 | return err; |
| 361 | |
| 362 | kfree(mei_buf); |
| 363 | |
| 364 | if (!wait_event_interruptible_timeout(ndev->send_wq, |
| 365 | ndev->recv_req_id == ndev->req_id, HZ)) { |
| 366 | dev_err(&dev->pdev->dev, "NFC MEI command timeout\n"); |
| 367 | err = -ETIMEDOUT; |
| 368 | } else { |
| 369 | ndev->req_id++; |
| 370 | } |
| 371 | |
| 372 | return err; |
| 373 | } |
| 374 | |
| 375 | static int mei_nfc_recv(struct mei_cl_device *cldev, u8 *buf, size_t length) |
| 376 | { |
| 377 | struct mei_nfc_dev *ndev; |
| 378 | struct mei_nfc_hci_hdr *hci_hdr; |
| 379 | int received_length; |
| 380 | |
| 381 | ndev = (struct mei_nfc_dev *)cldev->priv_data; |
| 382 | |
| 383 | received_length = __mei_cl_recv(ndev->cl, buf, length); |
| 384 | if (received_length < 0) |
| 385 | return received_length; |
| 386 | |
| 387 | hci_hdr = (struct mei_nfc_hci_hdr *) buf; |
| 388 | |
| 389 | if (hci_hdr->cmd == MEI_NFC_CMD_HCI_SEND) { |
| 390 | ndev->recv_req_id = hci_hdr->req_id; |
| 391 | wake_up(&ndev->send_wq); |
| 392 | |
| 393 | return 0; |
| 394 | } |
| 395 | |
| 396 | return received_length; |
| 397 | } |
| 398 | |
| 399 | static struct mei_cl_ops nfc_ops = { |
| 400 | .enable = mei_nfc_enable, |
| 401 | .disable = mei_nfc_disable, |
| 402 | .send = mei_nfc_send, |
| 403 | .recv = mei_nfc_recv, |
| 404 | }; |
| 405 | |
Samuel Ortiz | 59fcd7c | 2013-04-11 03:03:29 +0200 | [diff] [blame] | 406 | static void mei_nfc_init(struct work_struct *work) |
| 407 | { |
| 408 | struct mei_device *dev; |
Samuel Ortiz | 91a6b95 | 2013-04-11 03:03:30 +0200 | [diff] [blame] | 409 | struct mei_cl_device *cldev; |
Samuel Ortiz | 59fcd7c | 2013-04-11 03:03:29 +0200 | [diff] [blame] | 410 | struct mei_nfc_dev *ndev; |
| 411 | struct mei_cl *cl_info; |
| 412 | |
| 413 | ndev = container_of(work, struct mei_nfc_dev, init_work); |
| 414 | |
| 415 | cl_info = ndev->cl_info; |
| 416 | dev = cl_info->dev; |
| 417 | |
| 418 | mutex_lock(&dev->device_lock); |
| 419 | |
| 420 | if (mei_cl_connect(cl_info, NULL) < 0) { |
| 421 | mutex_unlock(&dev->device_lock); |
| 422 | dev_err(&dev->pdev->dev, |
| 423 | "Could not connect to the NFC INFO ME client"); |
| 424 | |
| 425 | goto err; |
| 426 | } |
| 427 | |
| 428 | mutex_unlock(&dev->device_lock); |
| 429 | |
| 430 | if (mei_nfc_if_version(ndev) < 0) { |
| 431 | dev_err(&dev->pdev->dev, "Could not get the NFC interfave version"); |
| 432 | |
| 433 | goto err; |
| 434 | } |
| 435 | |
| 436 | dev_info(&dev->pdev->dev, |
| 437 | "NFC MEI VERSION: IVN 0x%x Vendor ID 0x%x Type 0x%x\n", |
| 438 | ndev->fw_ivn, ndev->vendor_id, ndev->radio_type); |
| 439 | |
| 440 | mutex_lock(&dev->device_lock); |
| 441 | |
| 442 | if (mei_cl_disconnect(cl_info) < 0) { |
| 443 | mutex_unlock(&dev->device_lock); |
| 444 | dev_err(&dev->pdev->dev, |
| 445 | "Could not disconnect the NFC INFO ME client"); |
| 446 | |
| 447 | goto err; |
| 448 | } |
| 449 | |
| 450 | mutex_unlock(&dev->device_lock); |
| 451 | |
Samuel Ortiz | 91a6b95 | 2013-04-11 03:03:30 +0200 | [diff] [blame] | 452 | if (mei_nfc_build_bus_name(ndev) < 0) { |
| 453 | dev_err(&dev->pdev->dev, |
| 454 | "Could not build the bus ID name\n"); |
| 455 | return; |
| 456 | } |
| 457 | |
Samuel Ortiz | 36eda94 | 2013-04-11 03:03:31 +0200 | [diff] [blame] | 458 | cldev = mei_cl_add_device(dev, mei_nfc_guid, ndev->bus_name, &nfc_ops); |
Samuel Ortiz | 91a6b95 | 2013-04-11 03:03:30 +0200 | [diff] [blame] | 459 | if (!cldev) { |
| 460 | dev_err(&dev->pdev->dev, |
| 461 | "Could not add the NFC device to the MEI bus\n"); |
| 462 | |
| 463 | goto err; |
| 464 | } |
| 465 | |
| 466 | cldev->priv_data = ndev; |
| 467 | |
| 468 | |
Samuel Ortiz | 59fcd7c | 2013-04-11 03:03:29 +0200 | [diff] [blame] | 469 | return; |
| 470 | |
| 471 | err: |
| 472 | mei_nfc_free(ndev); |
| 473 | |
| 474 | return; |
| 475 | } |
| 476 | |
| 477 | |
| 478 | int mei_nfc_host_init(struct mei_device *dev) |
| 479 | { |
| 480 | struct mei_nfc_dev *ndev = &nfc_dev; |
| 481 | struct mei_cl *cl_info, *cl = NULL; |
| 482 | int i, ret; |
| 483 | |
| 484 | /* already initialzed */ |
| 485 | if (ndev->cl_info) |
| 486 | return 0; |
| 487 | |
| 488 | cl_info = mei_cl_allocate(dev); |
| 489 | cl = mei_cl_allocate(dev); |
| 490 | |
| 491 | if (!cl || !cl_info) { |
| 492 | ret = -ENOMEM; |
| 493 | goto err; |
| 494 | } |
| 495 | |
| 496 | /* check for valid client id */ |
| 497 | i = mei_me_cl_by_uuid(dev, &mei_nfc_info_guid); |
| 498 | if (i < 0) { |
| 499 | dev_info(&dev->pdev->dev, "nfc: failed to find the client\n"); |
| 500 | ret = -ENOENT; |
| 501 | goto err; |
| 502 | } |
| 503 | |
| 504 | cl_info->me_client_id = dev->me_clients[i].client_id; |
| 505 | |
| 506 | ret = mei_cl_link(cl_info, MEI_HOST_CLIENT_ID_ANY); |
| 507 | if (ret) |
| 508 | goto err; |
| 509 | |
| 510 | cl_info->device_uuid = mei_nfc_info_guid; |
| 511 | |
| 512 | list_add_tail(&cl_info->device_link, &dev->device_list); |
| 513 | |
| 514 | /* check for valid client id */ |
| 515 | i = mei_me_cl_by_uuid(dev, &mei_nfc_guid); |
| 516 | if (i < 0) { |
| 517 | dev_info(&dev->pdev->dev, "nfc: failed to find the client\n"); |
| 518 | ret = -ENOENT; |
| 519 | goto err; |
| 520 | } |
| 521 | |
| 522 | cl->me_client_id = dev->me_clients[i].client_id; |
| 523 | |
| 524 | ret = mei_cl_link(cl, MEI_HOST_CLIENT_ID_ANY); |
| 525 | if (ret) |
| 526 | goto err; |
| 527 | |
| 528 | cl->device_uuid = mei_nfc_guid; |
| 529 | |
| 530 | list_add_tail(&cl->device_link, &dev->device_list); |
| 531 | |
| 532 | ndev->cl_info = cl_info; |
| 533 | ndev->cl = cl; |
Samuel Ortiz | 36eda94 | 2013-04-11 03:03:31 +0200 | [diff] [blame] | 534 | ndev->req_id = 1; |
Samuel Ortiz | 59fcd7c | 2013-04-11 03:03:29 +0200 | [diff] [blame] | 535 | |
| 536 | INIT_WORK(&ndev->init_work, mei_nfc_init); |
Samuel Ortiz | 36eda94 | 2013-04-11 03:03:31 +0200 | [diff] [blame] | 537 | init_waitqueue_head(&ndev->send_wq); |
Samuel Ortiz | 59fcd7c | 2013-04-11 03:03:29 +0200 | [diff] [blame] | 538 | schedule_work(&ndev->init_work); |
| 539 | |
| 540 | return 0; |
| 541 | |
| 542 | err: |
| 543 | mei_nfc_free(ndev); |
| 544 | |
| 545 | return ret; |
| 546 | } |
| 547 | |
| 548 | void mei_nfc_host_exit(void) |
| 549 | { |
| 550 | struct mei_nfc_dev *ndev = &nfc_dev; |
| 551 | |
Samuel Ortiz | 91a6b95 | 2013-04-11 03:03:30 +0200 | [diff] [blame] | 552 | if (ndev->cl && ndev->cl->device) |
| 553 | mei_cl_remove_device(ndev->cl->device); |
| 554 | |
Samuel Ortiz | 59fcd7c | 2013-04-11 03:03:29 +0200 | [diff] [blame] | 555 | mei_nfc_free(ndev); |
| 556 | } |