Ilan Elias | 93aead4 | 2011-09-18 11:19:36 +0300 | [diff] [blame] | 1 | /* |
| 2 | * Texas Instrument's NFC Driver For Shared Transport. |
| 3 | * |
| 4 | * NFC Driver acts as interface between NCI core and |
| 5 | * TI Shared Transport Layer. |
| 6 | * |
| 7 | * Copyright (C) 2011 Texas Instruments, Inc. |
| 8 | * |
| 9 | * Written by Ilan Elias <ilane@ti.com> |
| 10 | * |
| 11 | * Acknowledgements: |
| 12 | * This file is based on btwilink.c, which was written |
| 13 | * by Raja Mani and Pavan Savoy. |
| 14 | * |
| 15 | * This program is free software; you can redistribute it and/or modify |
| 16 | * it under the terms of the GNU General Public License version 2 as |
| 17 | * published by the Free Software Foundation. |
| 18 | * |
| 19 | * This program is distributed in the hope that it will be useful, |
| 20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 22 | * GNU General Public License for more details. |
| 23 | * |
| 24 | * You should have received a copy of the GNU General Public License |
| 25 | * along with this program; if not, write to the Free Software |
| 26 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 27 | * |
| 28 | */ |
| 29 | #include <linux/platform_device.h> |
Paul Gortmaker | baf79c3 | 2011-09-28 15:31:14 -0400 | [diff] [blame] | 30 | #include <linux/module.h> |
Ilan Elias | 3ed1326 | 2012-01-17 14:11:31 +0200 | [diff] [blame] | 31 | #include <linux/types.h> |
Ilan Elias | 1195d89 | 2012-01-17 14:11:32 +0200 | [diff] [blame] | 32 | #include <linux/firmware.h> |
Ilan Elias | 93aead4 | 2011-09-18 11:19:36 +0300 | [diff] [blame] | 33 | #include <linux/nfc.h> |
| 34 | #include <net/nfc/nci.h> |
| 35 | #include <net/nfc/nci_core.h> |
| 36 | #include <linux/ti_wilink_st.h> |
| 37 | |
| 38 | #define NFCWILINK_CHNL 12 |
| 39 | #define NFCWILINK_OPCODE 7 |
| 40 | #define NFCWILINK_MAX_FRAME_SIZE 300 |
| 41 | #define NFCWILINK_HDR_LEN 4 |
| 42 | #define NFCWILINK_OFFSET_LEN_IN_HDR 1 |
| 43 | #define NFCWILINK_LEN_SIZE 2 |
| 44 | #define NFCWILINK_REGISTER_TIMEOUT 8000 /* 8 sec */ |
Ilan Elias | 1195d89 | 2012-01-17 14:11:32 +0200 | [diff] [blame] | 45 | #define NFCWILINK_CMD_TIMEOUT 5000 /* 5 sec */ |
| 46 | |
| 47 | #define BTS_FILE_NAME_MAX_SIZE 40 |
| 48 | #define BTS_FILE_HDR_MAGIC 0x42535442 |
| 49 | #define BTS_FILE_CMD_MAX_LEN 0xff |
| 50 | #define BTS_FILE_ACTION_TYPE_SEND_CMD 1 |
| 51 | |
| 52 | #define NCI_VS_NFCC_INFO_CMD_GID 0x2f |
| 53 | #define NCI_VS_NFCC_INFO_CMD_OID 0x12 |
| 54 | #define NCI_VS_NFCC_INFO_RSP_GID 0x4f |
| 55 | #define NCI_VS_NFCC_INFO_RSP_OID 0x12 |
Ilan Elias | 93aead4 | 2011-09-18 11:19:36 +0300 | [diff] [blame] | 56 | |
| 57 | struct nfcwilink_hdr { |
Ilan Elias | 3ed1326 | 2012-01-17 14:11:31 +0200 | [diff] [blame] | 58 | __u8 chnl; |
| 59 | __u8 opcode; |
| 60 | __le16 len; |
Ilan Elias | 93aead4 | 2011-09-18 11:19:36 +0300 | [diff] [blame] | 61 | } __packed; |
| 62 | |
Ilan Elias | 1195d89 | 2012-01-17 14:11:32 +0200 | [diff] [blame] | 63 | struct nci_vs_nfcc_info_cmd { |
| 64 | __u8 gid; |
| 65 | __u8 oid; |
| 66 | __u8 plen; |
| 67 | } __packed; |
| 68 | |
| 69 | struct nci_vs_nfcc_info_rsp { |
| 70 | __u8 gid; |
| 71 | __u8 oid; |
| 72 | __u8 plen; |
| 73 | __u8 status; |
| 74 | __u8 hw_id; |
| 75 | __u8 sw_ver_x; |
| 76 | __u8 sw_ver_z; |
| 77 | __u8 patch_id; |
| 78 | } __packed; |
| 79 | |
| 80 | struct bts_file_hdr { |
| 81 | __le32 magic; |
| 82 | __le32 ver; |
| 83 | __u8 rfu[24]; |
| 84 | __u8 actions[0]; |
| 85 | } __packed; |
| 86 | |
| 87 | struct bts_file_action { |
| 88 | __le16 type; |
| 89 | __le16 len; |
| 90 | __u8 data[0]; |
| 91 | } __packed; |
| 92 | |
Ilan Elias | 93aead4 | 2011-09-18 11:19:36 +0300 | [diff] [blame] | 93 | struct nfcwilink { |
| 94 | struct platform_device *pdev; |
| 95 | struct nci_dev *ndev; |
| 96 | unsigned long flags; |
| 97 | |
| 98 | char st_register_cb_status; |
| 99 | long (*st_write) (struct sk_buff *); |
Ilan Elias | 1195d89 | 2012-01-17 14:11:32 +0200 | [diff] [blame] | 100 | |
| 101 | struct completion completed; |
| 102 | |
| 103 | struct nci_vs_nfcc_info_rsp nfcc_info; |
Ilan Elias | 93aead4 | 2011-09-18 11:19:36 +0300 | [diff] [blame] | 104 | }; |
| 105 | |
| 106 | /* NFCWILINK driver flags */ |
| 107 | enum { |
| 108 | NFCWILINK_RUNNING, |
Ilan Elias | 1195d89 | 2012-01-17 14:11:32 +0200 | [diff] [blame] | 109 | NFCWILINK_FW_DOWNLOAD, |
Ilan Elias | 93aead4 | 2011-09-18 11:19:36 +0300 | [diff] [blame] | 110 | }; |
| 111 | |
Ilan Elias | 1195d89 | 2012-01-17 14:11:32 +0200 | [diff] [blame] | 112 | static int nfcwilink_send(struct sk_buff *skb); |
| 113 | |
| 114 | static inline struct sk_buff *nfcwilink_skb_alloc(unsigned int len, gfp_t how) |
| 115 | { |
| 116 | struct sk_buff *skb; |
| 117 | |
| 118 | skb = alloc_skb(len + NFCWILINK_HDR_LEN, how); |
| 119 | if (skb) |
| 120 | skb_reserve(skb, NFCWILINK_HDR_LEN); |
| 121 | |
| 122 | return skb; |
| 123 | } |
| 124 | |
| 125 | static void nfcwilink_fw_download_receive(struct nfcwilink *drv, |
| 126 | struct sk_buff *skb) |
| 127 | { |
| 128 | struct nci_vs_nfcc_info_rsp *rsp = (void *)skb->data; |
| 129 | |
| 130 | /* Detect NCI_VS_NFCC_INFO_RSP and store the result */ |
| 131 | if ((skb->len > 3) && (rsp->gid == NCI_VS_NFCC_INFO_RSP_GID) && |
| 132 | (rsp->oid == NCI_VS_NFCC_INFO_RSP_OID)) { |
| 133 | memcpy(&drv->nfcc_info, rsp, |
| 134 | sizeof(struct nci_vs_nfcc_info_rsp)); |
| 135 | } |
| 136 | |
| 137 | kfree_skb(skb); |
| 138 | |
| 139 | complete(&drv->completed); |
| 140 | } |
| 141 | |
| 142 | static int nfcwilink_get_bts_file_name(struct nfcwilink *drv, char *file_name) |
| 143 | { |
| 144 | struct nci_vs_nfcc_info_cmd *cmd; |
| 145 | struct sk_buff *skb; |
| 146 | unsigned long comp_ret; |
| 147 | int rc; |
| 148 | |
| 149 | nfc_dev_dbg(&drv->pdev->dev, "get_bts_file_name entry"); |
| 150 | |
| 151 | skb = nfcwilink_skb_alloc(sizeof(struct nci_vs_nfcc_info_cmd), |
| 152 | GFP_KERNEL); |
| 153 | if (!skb) { |
| 154 | nfc_dev_err(&drv->pdev->dev, |
| 155 | "no memory for nci_vs_nfcc_info_cmd"); |
| 156 | return -ENOMEM; |
| 157 | } |
| 158 | |
| 159 | skb->dev = (void *)drv->ndev; |
| 160 | |
| 161 | cmd = (struct nci_vs_nfcc_info_cmd *) |
| 162 | skb_put(skb, sizeof(struct nci_vs_nfcc_info_cmd)); |
| 163 | cmd->gid = NCI_VS_NFCC_INFO_CMD_GID; |
| 164 | cmd->oid = NCI_VS_NFCC_INFO_CMD_OID; |
| 165 | cmd->plen = 0; |
| 166 | |
| 167 | drv->nfcc_info.plen = 0; |
| 168 | |
| 169 | rc = nfcwilink_send(skb); |
| 170 | if (rc) |
| 171 | return rc; |
| 172 | |
| 173 | comp_ret = wait_for_completion_timeout(&drv->completed, |
| 174 | msecs_to_jiffies(NFCWILINK_CMD_TIMEOUT)); |
| 175 | nfc_dev_dbg(&drv->pdev->dev, "wait_for_completion_timeout returned %ld", |
| 176 | comp_ret); |
| 177 | if (comp_ret == 0) { |
| 178 | nfc_dev_err(&drv->pdev->dev, |
| 179 | "timeout on wait_for_completion_timeout"); |
| 180 | return -ETIMEDOUT; |
| 181 | } |
| 182 | |
| 183 | nfc_dev_dbg(&drv->pdev->dev, "nci_vs_nfcc_info_rsp: plen %d, status %d", |
| 184 | drv->nfcc_info.plen, |
| 185 | drv->nfcc_info.status); |
| 186 | |
| 187 | if ((drv->nfcc_info.plen != 5) || (drv->nfcc_info.status != 0)) { |
| 188 | nfc_dev_err(&drv->pdev->dev, |
| 189 | "invalid nci_vs_nfcc_info_rsp"); |
| 190 | return -EINVAL; |
| 191 | } |
| 192 | |
| 193 | snprintf(file_name, BTS_FILE_NAME_MAX_SIZE, |
| 194 | "TINfcInit_%d.%d.%d.%d.bts", |
| 195 | drv->nfcc_info.hw_id, |
| 196 | drv->nfcc_info.sw_ver_x, |
| 197 | drv->nfcc_info.sw_ver_z, |
| 198 | drv->nfcc_info.patch_id); |
| 199 | |
| 200 | nfc_dev_info(&drv->pdev->dev, "nfcwilink FW file name: %s", file_name); |
| 201 | |
| 202 | return 0; |
| 203 | } |
| 204 | |
| 205 | static int nfcwilink_send_bts_cmd(struct nfcwilink *drv, __u8 *data, int len) |
| 206 | { |
| 207 | struct nfcwilink_hdr *hdr = (struct nfcwilink_hdr *)data; |
| 208 | struct sk_buff *skb; |
| 209 | unsigned long comp_ret; |
| 210 | int rc; |
| 211 | |
| 212 | nfc_dev_dbg(&drv->pdev->dev, "send_bts_cmd entry"); |
| 213 | |
| 214 | /* verify valid cmd for the NFC channel */ |
| 215 | if ((len <= sizeof(struct nfcwilink_hdr)) || |
| 216 | (len > BTS_FILE_CMD_MAX_LEN) || |
| 217 | (hdr->chnl != NFCWILINK_CHNL) || |
| 218 | (hdr->opcode != NFCWILINK_OPCODE)) { |
| 219 | nfc_dev_err(&drv->pdev->dev, |
| 220 | "ignoring invalid bts cmd, len %d, chnl %d, opcode %d", |
| 221 | len, hdr->chnl, hdr->opcode); |
| 222 | return 0; |
| 223 | } |
| 224 | |
| 225 | /* remove the ST header */ |
| 226 | len -= sizeof(struct nfcwilink_hdr); |
| 227 | data += sizeof(struct nfcwilink_hdr); |
| 228 | |
| 229 | skb = nfcwilink_skb_alloc(len, GFP_KERNEL); |
| 230 | if (!skb) { |
| 231 | nfc_dev_err(&drv->pdev->dev, "no memory for bts cmd"); |
| 232 | return -ENOMEM; |
| 233 | } |
| 234 | |
| 235 | skb->dev = (void *)drv->ndev; |
| 236 | |
| 237 | memcpy(skb_put(skb, len), data, len); |
| 238 | |
| 239 | rc = nfcwilink_send(skb); |
| 240 | if (rc) |
| 241 | return rc; |
| 242 | |
| 243 | comp_ret = wait_for_completion_timeout(&drv->completed, |
| 244 | msecs_to_jiffies(NFCWILINK_CMD_TIMEOUT)); |
| 245 | nfc_dev_dbg(&drv->pdev->dev, "wait_for_completion_timeout returned %ld", |
| 246 | comp_ret); |
| 247 | if (comp_ret == 0) { |
| 248 | nfc_dev_err(&drv->pdev->dev, |
| 249 | "timeout on wait_for_completion_timeout"); |
| 250 | return -ETIMEDOUT; |
| 251 | } |
| 252 | |
| 253 | return 0; |
| 254 | } |
| 255 | |
| 256 | static int nfcwilink_download_fw(struct nfcwilink *drv) |
| 257 | { |
| 258 | unsigned char file_name[BTS_FILE_NAME_MAX_SIZE]; |
| 259 | const struct firmware *fw; |
| 260 | __u16 action_type, action_len; |
| 261 | __u8 *ptr; |
| 262 | int len, rc; |
| 263 | |
| 264 | nfc_dev_dbg(&drv->pdev->dev, "download_fw entry"); |
| 265 | |
| 266 | set_bit(NFCWILINK_FW_DOWNLOAD, &drv->flags); |
| 267 | |
| 268 | rc = nfcwilink_get_bts_file_name(drv, file_name); |
| 269 | if (rc) |
| 270 | goto exit; |
| 271 | |
| 272 | rc = request_firmware(&fw, file_name, &drv->pdev->dev); |
| 273 | if (rc) { |
| 274 | nfc_dev_err(&drv->pdev->dev, "request_firmware failed %d", rc); |
| 275 | |
| 276 | /* if the file is not found, don't exit with failure */ |
| 277 | if (rc == -ENOENT) |
| 278 | rc = 0; |
| 279 | |
| 280 | goto exit; |
| 281 | } |
| 282 | |
| 283 | len = fw->size; |
| 284 | ptr = (__u8 *)fw->data; |
| 285 | |
| 286 | if ((len == 0) || (ptr == NULL)) { |
| 287 | nfc_dev_dbg(&drv->pdev->dev, |
| 288 | "request_firmware returned size %d", len); |
| 289 | goto release_fw; |
| 290 | } |
| 291 | |
| 292 | if (__le32_to_cpu(((struct bts_file_hdr *)ptr)->magic) != |
| 293 | BTS_FILE_HDR_MAGIC) { |
| 294 | nfc_dev_err(&drv->pdev->dev, "wrong bts magic number"); |
| 295 | rc = -EINVAL; |
| 296 | goto release_fw; |
| 297 | } |
| 298 | |
| 299 | /* remove the BTS header */ |
| 300 | len -= sizeof(struct bts_file_hdr); |
| 301 | ptr += sizeof(struct bts_file_hdr); |
| 302 | |
| 303 | while (len > 0) { |
| 304 | action_type = |
| 305 | __le16_to_cpu(((struct bts_file_action *)ptr)->type); |
| 306 | action_len = |
| 307 | __le16_to_cpu(((struct bts_file_action *)ptr)->len); |
| 308 | |
| 309 | nfc_dev_dbg(&drv->pdev->dev, "bts_file_action type %d, len %d", |
| 310 | action_type, action_len); |
| 311 | |
| 312 | switch (action_type) { |
| 313 | case BTS_FILE_ACTION_TYPE_SEND_CMD: |
| 314 | rc = nfcwilink_send_bts_cmd(drv, |
| 315 | ((struct bts_file_action *)ptr)->data, |
| 316 | action_len); |
| 317 | if (rc) |
| 318 | goto release_fw; |
| 319 | break; |
| 320 | } |
| 321 | |
| 322 | /* advance to the next action */ |
| 323 | len -= (sizeof(struct bts_file_action) + action_len); |
| 324 | ptr += (sizeof(struct bts_file_action) + action_len); |
| 325 | } |
| 326 | |
| 327 | release_fw: |
| 328 | release_firmware(fw); |
| 329 | |
| 330 | exit: |
| 331 | clear_bit(NFCWILINK_FW_DOWNLOAD, &drv->flags); |
| 332 | return rc; |
| 333 | } |
| 334 | |
Ilan Elias | 93aead4 | 2011-09-18 11:19:36 +0300 | [diff] [blame] | 335 | /* Called by ST when registration is complete */ |
| 336 | static void nfcwilink_register_complete(void *priv_data, char data) |
| 337 | { |
| 338 | struct nfcwilink *drv = priv_data; |
| 339 | |
| 340 | nfc_dev_dbg(&drv->pdev->dev, "register_complete entry"); |
| 341 | |
| 342 | /* store ST registration status */ |
| 343 | drv->st_register_cb_status = data; |
| 344 | |
| 345 | /* complete the wait in nfc_st_open() */ |
Ilan Elias | 1195d89 | 2012-01-17 14:11:32 +0200 | [diff] [blame] | 346 | complete(&drv->completed); |
Ilan Elias | 93aead4 | 2011-09-18 11:19:36 +0300 | [diff] [blame] | 347 | } |
| 348 | |
| 349 | /* Called by ST when receive data is available */ |
| 350 | static long nfcwilink_receive(void *priv_data, struct sk_buff *skb) |
| 351 | { |
| 352 | struct nfcwilink *drv = priv_data; |
| 353 | int rc; |
| 354 | |
| 355 | nfc_dev_dbg(&drv->pdev->dev, "receive entry, len %d", skb->len); |
| 356 | |
| 357 | if (!skb) |
| 358 | return -EFAULT; |
| 359 | |
| 360 | if (!drv) { |
| 361 | kfree_skb(skb); |
| 362 | return -EFAULT; |
| 363 | } |
| 364 | |
| 365 | /* strip the ST header |
| 366 | (apart for the chnl byte, which is not received in the hdr) */ |
| 367 | skb_pull(skb, (NFCWILINK_HDR_LEN-1)); |
| 368 | |
Ilan Elias | 1195d89 | 2012-01-17 14:11:32 +0200 | [diff] [blame] | 369 | if (test_bit(NFCWILINK_FW_DOWNLOAD, &drv->flags)) { |
| 370 | nfcwilink_fw_download_receive(drv, skb); |
| 371 | return 0; |
| 372 | } |
| 373 | |
Ilan Elias | 93aead4 | 2011-09-18 11:19:36 +0300 | [diff] [blame] | 374 | skb->dev = (void *) drv->ndev; |
| 375 | |
| 376 | /* Forward skb to NCI core layer */ |
| 377 | rc = nci_recv_frame(skb); |
| 378 | if (rc < 0) { |
| 379 | nfc_dev_err(&drv->pdev->dev, "nci_recv_frame failed %d", rc); |
| 380 | return rc; |
| 381 | } |
| 382 | |
| 383 | return 0; |
| 384 | } |
| 385 | |
| 386 | /* protocol structure registered with ST */ |
| 387 | static struct st_proto_s nfcwilink_proto = { |
| 388 | .chnl_id = NFCWILINK_CHNL, |
| 389 | .max_frame_size = NFCWILINK_MAX_FRAME_SIZE, |
| 390 | .hdr_len = (NFCWILINK_HDR_LEN-1), /* not including chnl byte */ |
| 391 | .offset_len_in_hdr = NFCWILINK_OFFSET_LEN_IN_HDR, |
| 392 | .len_size = NFCWILINK_LEN_SIZE, |
| 393 | .reserve = 0, |
| 394 | .recv = nfcwilink_receive, |
| 395 | .reg_complete_cb = nfcwilink_register_complete, |
| 396 | .write = NULL, |
| 397 | }; |
| 398 | |
| 399 | static int nfcwilink_open(struct nci_dev *ndev) |
| 400 | { |
| 401 | struct nfcwilink *drv = nci_get_drvdata(ndev); |
| 402 | unsigned long comp_ret; |
| 403 | int rc; |
| 404 | |
| 405 | nfc_dev_dbg(&drv->pdev->dev, "open entry"); |
| 406 | |
| 407 | if (test_and_set_bit(NFCWILINK_RUNNING, &drv->flags)) { |
| 408 | rc = -EBUSY; |
| 409 | goto exit; |
| 410 | } |
| 411 | |
| 412 | nfcwilink_proto.priv_data = drv; |
| 413 | |
Ilan Elias | 1195d89 | 2012-01-17 14:11:32 +0200 | [diff] [blame] | 414 | init_completion(&drv->completed); |
Ilan Elias | 93aead4 | 2011-09-18 11:19:36 +0300 | [diff] [blame] | 415 | drv->st_register_cb_status = -EINPROGRESS; |
| 416 | |
| 417 | rc = st_register(&nfcwilink_proto); |
| 418 | if (rc < 0) { |
| 419 | if (rc == -EINPROGRESS) { |
| 420 | comp_ret = wait_for_completion_timeout( |
Ilan Elias | 1195d89 | 2012-01-17 14:11:32 +0200 | [diff] [blame] | 421 | &drv->completed, |
Ilan Elias | 93aead4 | 2011-09-18 11:19:36 +0300 | [diff] [blame] | 422 | msecs_to_jiffies(NFCWILINK_REGISTER_TIMEOUT)); |
| 423 | |
| 424 | nfc_dev_dbg(&drv->pdev->dev, |
| 425 | "wait_for_completion_timeout returned %ld", |
| 426 | comp_ret); |
| 427 | |
| 428 | if (comp_ret == 0) { |
| 429 | /* timeout */ |
| 430 | rc = -ETIMEDOUT; |
| 431 | goto clear_exit; |
| 432 | } else if (drv->st_register_cb_status != 0) { |
| 433 | rc = drv->st_register_cb_status; |
| 434 | nfc_dev_err(&drv->pdev->dev, |
| 435 | "st_register_cb failed %d", rc); |
| 436 | goto clear_exit; |
| 437 | } |
| 438 | } else { |
| 439 | nfc_dev_err(&drv->pdev->dev, |
| 440 | "st_register failed %d", rc); |
| 441 | goto clear_exit; |
| 442 | } |
| 443 | } |
| 444 | |
| 445 | /* st_register MUST fill the write callback */ |
| 446 | BUG_ON(nfcwilink_proto.write == NULL); |
| 447 | drv->st_write = nfcwilink_proto.write; |
| 448 | |
Ilan Elias | 1195d89 | 2012-01-17 14:11:32 +0200 | [diff] [blame] | 449 | if (nfcwilink_download_fw(drv)) { |
| 450 | nfc_dev_err(&drv->pdev->dev, "nfcwilink_download_fw failed %d", |
| 451 | rc); |
| 452 | /* open should succeed, even if the FW download failed */ |
| 453 | } |
| 454 | |
Ilan Elias | 93aead4 | 2011-09-18 11:19:36 +0300 | [diff] [blame] | 455 | goto exit; |
| 456 | |
| 457 | clear_exit: |
| 458 | clear_bit(NFCWILINK_RUNNING, &drv->flags); |
| 459 | |
| 460 | exit: |
| 461 | return rc; |
| 462 | } |
| 463 | |
| 464 | static int nfcwilink_close(struct nci_dev *ndev) |
| 465 | { |
| 466 | struct nfcwilink *drv = nci_get_drvdata(ndev); |
| 467 | int rc; |
| 468 | |
| 469 | nfc_dev_dbg(&drv->pdev->dev, "close entry"); |
| 470 | |
| 471 | if (!test_and_clear_bit(NFCWILINK_RUNNING, &drv->flags)) |
| 472 | return 0; |
| 473 | |
| 474 | rc = st_unregister(&nfcwilink_proto); |
| 475 | if (rc) |
| 476 | nfc_dev_err(&drv->pdev->dev, "st_unregister failed %d", rc); |
| 477 | |
| 478 | drv->st_write = NULL; |
| 479 | |
| 480 | return rc; |
| 481 | } |
| 482 | |
| 483 | static int nfcwilink_send(struct sk_buff *skb) |
| 484 | { |
| 485 | struct nci_dev *ndev = (struct nci_dev *)skb->dev; |
| 486 | struct nfcwilink *drv = nci_get_drvdata(ndev); |
| 487 | struct nfcwilink_hdr hdr = {NFCWILINK_CHNL, NFCWILINK_OPCODE, 0x0000}; |
| 488 | long len; |
| 489 | |
| 490 | nfc_dev_dbg(&drv->pdev->dev, "send entry, len %d", skb->len); |
| 491 | |
Ilan Elias | ea9917d | 2012-01-17 14:11:33 +0200 | [diff] [blame] | 492 | if (!test_bit(NFCWILINK_RUNNING, &drv->flags)) { |
| 493 | kfree_skb(skb); |
| 494 | return -EINVAL; |
| 495 | } |
Ilan Elias | 93aead4 | 2011-09-18 11:19:36 +0300 | [diff] [blame] | 496 | |
| 497 | /* add the ST hdr to the start of the buffer */ |
Ilan Elias | 3ed1326 | 2012-01-17 14:11:31 +0200 | [diff] [blame] | 498 | hdr.len = cpu_to_le16(skb->len); |
Ilan Elias | 93aead4 | 2011-09-18 11:19:36 +0300 | [diff] [blame] | 499 | memcpy(skb_push(skb, NFCWILINK_HDR_LEN), &hdr, NFCWILINK_HDR_LEN); |
| 500 | |
| 501 | /* Insert skb to shared transport layer's transmit queue. |
| 502 | * Freeing skb memory is taken care in shared transport layer, |
| 503 | * so don't free skb memory here. |
| 504 | */ |
| 505 | len = drv->st_write(skb); |
| 506 | if (len < 0) { |
| 507 | kfree_skb(skb); |
| 508 | nfc_dev_err(&drv->pdev->dev, "st_write failed %ld", len); |
| 509 | return -EFAULT; |
| 510 | } |
| 511 | |
| 512 | return 0; |
| 513 | } |
| 514 | |
| 515 | static struct nci_ops nfcwilink_ops = { |
| 516 | .open = nfcwilink_open, |
| 517 | .close = nfcwilink_close, |
| 518 | .send = nfcwilink_send, |
| 519 | }; |
| 520 | |
| 521 | static int nfcwilink_probe(struct platform_device *pdev) |
| 522 | { |
| 523 | static struct nfcwilink *drv; |
| 524 | int rc; |
Ilan Elias | 3ed1326 | 2012-01-17 14:11:31 +0200 | [diff] [blame] | 525 | __u32 protocols; |
Ilan Elias | 93aead4 | 2011-09-18 11:19:36 +0300 | [diff] [blame] | 526 | |
| 527 | nfc_dev_dbg(&pdev->dev, "probe entry"); |
| 528 | |
| 529 | drv = kzalloc(sizeof(struct nfcwilink), GFP_KERNEL); |
| 530 | if (!drv) { |
| 531 | rc = -ENOMEM; |
| 532 | goto exit; |
| 533 | } |
| 534 | |
| 535 | drv->pdev = pdev; |
| 536 | |
| 537 | protocols = NFC_PROTO_JEWEL_MASK |
Samuel Ortiz | 01d719a | 2012-07-04 00:14:04 +0200 | [diff] [blame] | 538 | | NFC_PROTO_MIFARE_MASK | NFC_PROTO_FELICA_MASK |
| 539 | | NFC_PROTO_ISO14443_MASK |
| 540 | | NFC_PROTO_ISO14443_B_MASK |
| 541 | | NFC_PROTO_NFC_DEP_MASK; |
Ilan Elias | 93aead4 | 2011-09-18 11:19:36 +0300 | [diff] [blame] | 542 | |
| 543 | drv->ndev = nci_allocate_device(&nfcwilink_ops, |
| 544 | protocols, |
| 545 | NFCWILINK_HDR_LEN, |
| 546 | 0); |
| 547 | if (!drv->ndev) { |
| 548 | nfc_dev_err(&pdev->dev, "nci_allocate_device failed"); |
| 549 | rc = -ENOMEM; |
| 550 | goto free_exit; |
| 551 | } |
| 552 | |
| 553 | nci_set_parent_dev(drv->ndev, &pdev->dev); |
| 554 | nci_set_drvdata(drv->ndev, drv); |
| 555 | |
| 556 | rc = nci_register_device(drv->ndev); |
| 557 | if (rc < 0) { |
| 558 | nfc_dev_err(&pdev->dev, "nci_register_device failed %d", rc); |
| 559 | goto free_dev_exit; |
| 560 | } |
| 561 | |
| 562 | dev_set_drvdata(&pdev->dev, drv); |
| 563 | |
| 564 | goto exit; |
| 565 | |
| 566 | free_dev_exit: |
| 567 | nci_free_device(drv->ndev); |
| 568 | |
| 569 | free_exit: |
| 570 | kfree(drv); |
| 571 | |
| 572 | exit: |
| 573 | return rc; |
| 574 | } |
| 575 | |
| 576 | static int nfcwilink_remove(struct platform_device *pdev) |
| 577 | { |
| 578 | struct nfcwilink *drv = dev_get_drvdata(&pdev->dev); |
| 579 | struct nci_dev *ndev; |
| 580 | |
| 581 | nfc_dev_dbg(&pdev->dev, "remove entry"); |
| 582 | |
| 583 | if (!drv) |
| 584 | return -EFAULT; |
| 585 | |
| 586 | ndev = drv->ndev; |
| 587 | |
| 588 | nci_unregister_device(ndev); |
| 589 | nci_free_device(ndev); |
| 590 | |
| 591 | kfree(drv); |
| 592 | |
| 593 | dev_set_drvdata(&pdev->dev, NULL); |
| 594 | |
| 595 | return 0; |
| 596 | } |
| 597 | |
| 598 | static struct platform_driver nfcwilink_driver = { |
| 599 | .probe = nfcwilink_probe, |
| 600 | .remove = nfcwilink_remove, |
| 601 | .driver = { |
| 602 | .name = "nfcwilink", |
| 603 | .owner = THIS_MODULE, |
| 604 | }, |
| 605 | }; |
| 606 | |
| 607 | /* ------- Module Init/Exit interfaces ------ */ |
| 608 | static int __init nfcwilink_init(void) |
| 609 | { |
| 610 | printk(KERN_INFO "NFC Driver for TI WiLink"); |
| 611 | |
| 612 | return platform_driver_register(&nfcwilink_driver); |
| 613 | } |
| 614 | |
| 615 | static void __exit nfcwilink_exit(void) |
| 616 | { |
| 617 | platform_driver_unregister(&nfcwilink_driver); |
| 618 | } |
| 619 | |
| 620 | module_init(nfcwilink_init); |
| 621 | module_exit(nfcwilink_exit); |
| 622 | |
| 623 | /* ------ Module Info ------ */ |
| 624 | |
| 625 | MODULE_AUTHOR("Ilan Elias <ilane@ti.com>"); |
| 626 | MODULE_DESCRIPTION("NFC Driver for TI Shared Transport"); |
| 627 | MODULE_LICENSE("GPL"); |