Thomas Gleixner | 2025cf9 | 2019-05-29 07:18:02 -0700 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-only |
Thierry Escande | 59ee236 | 2013-09-19 17:55:26 +0200 | [diff] [blame] | 2 | /* |
| 3 | * NFC Digital Protocol stack |
| 4 | * Copyright (c) 2013, Intel Corporation. |
Thierry Escande | 59ee236 | 2013-09-19 17:55:26 +0200 | [diff] [blame] | 5 | */ |
| 6 | |
Samuel Ortiz | c5da0e4 | 2013-09-20 09:05:48 +0200 | [diff] [blame] | 7 | #define pr_fmt(fmt) "digital: %s: " fmt, __func__ |
| 8 | |
Thierry Escande | 59ee236 | 2013-09-19 17:55:26 +0200 | [diff] [blame] | 9 | #include "digital.h" |
| 10 | |
| 11 | #define DIGITAL_CMD_SENS_REQ 0x26 |
| 12 | #define DIGITAL_CMD_ALL_REQ 0x52 |
| 13 | #define DIGITAL_CMD_SEL_REQ_CL1 0x93 |
| 14 | #define DIGITAL_CMD_SEL_REQ_CL2 0x95 |
| 15 | #define DIGITAL_CMD_SEL_REQ_CL3 0x97 |
| 16 | |
| 17 | #define DIGITAL_SDD_REQ_SEL_PAR 0x20 |
| 18 | |
| 19 | #define DIGITAL_SDD_RES_CT 0x88 |
| 20 | #define DIGITAL_SDD_RES_LEN 5 |
Mark Greer | 7f9f171 | 2017-06-15 10:46:15 -0700 | [diff] [blame] | 21 | #define DIGITAL_SEL_RES_LEN 1 |
Thierry Escande | 59ee236 | 2013-09-19 17:55:26 +0200 | [diff] [blame] | 22 | |
Thierry Escande | 2c66dae | 2013-09-19 17:55:27 +0200 | [diff] [blame] | 23 | #define DIGITAL_SEL_RES_NFCID1_COMPLETE(sel_res) (!((sel_res) & 0x04)) |
| 24 | #define DIGITAL_SEL_RES_IS_T2T(sel_res) (!((sel_res) & 0x60)) |
Thierry Escande | 12e3d24 | 2014-01-27 00:31:31 +0100 | [diff] [blame] | 25 | #define DIGITAL_SEL_RES_IS_T4T(sel_res) ((sel_res) & 0x20) |
Thierry Escande | 7d0911c | 2013-09-19 17:55:29 +0200 | [diff] [blame] | 26 | #define DIGITAL_SEL_RES_IS_NFC_DEP(sel_res) ((sel_res) & 0x40) |
Thierry Escande | 2c66dae | 2013-09-19 17:55:27 +0200 | [diff] [blame] | 27 | |
Thierry Escande | 13292c9 | 2013-09-24 11:47:34 +0200 | [diff] [blame] | 28 | #define DIGITAL_SENS_RES_IS_T1T(sens_res) (((sens_res) & 0x0C00) == 0x0C00) |
Thierry Escande | 2c66dae | 2013-09-19 17:55:27 +0200 | [diff] [blame] | 29 | #define DIGITAL_SENS_RES_IS_VALID(sens_res) \ |
Thierry Escande | 13292c9 | 2013-09-24 11:47:34 +0200 | [diff] [blame] | 30 | ((!((sens_res) & 0x001F) && (((sens_res) & 0x0C00) == 0x0C00)) || \ |
| 31 | (((sens_res) & 0x001F) && ((sens_res) & 0x0C00) != 0x0C00)) |
Thierry Escande | 2c66dae | 2013-09-19 17:55:27 +0200 | [diff] [blame] | 32 | |
| 33 | #define DIGITAL_MIFARE_READ_RES_LEN 16 |
| 34 | #define DIGITAL_MIFARE_ACK_RES 0x0A |
| 35 | |
Mark A. Greer | 2473460 | 2014-03-31 17:36:38 -0700 | [diff] [blame] | 36 | #define DIGITAL_CMD_SENSB_REQ 0x05 |
| 37 | #define DIGITAL_SENSB_ADVANCED BIT(5) |
| 38 | #define DIGITAL_SENSB_EXTENDED BIT(4) |
| 39 | #define DIGITAL_SENSB_ALLB_REQ BIT(3) |
| 40 | #define DIGITAL_SENSB_N(n) ((n) & 0x7) |
| 41 | |
| 42 | #define DIGITAL_CMD_SENSB_RES 0x50 |
| 43 | |
| 44 | #define DIGITAL_CMD_ATTRIB_REQ 0x1D |
| 45 | #define DIGITAL_ATTRIB_P1_TR0_DEFAULT (0x0 << 6) |
| 46 | #define DIGITAL_ATTRIB_P1_TR1_DEFAULT (0x0 << 4) |
| 47 | #define DIGITAL_ATTRIB_P1_SUPRESS_EOS BIT(3) |
| 48 | #define DIGITAL_ATTRIB_P1_SUPRESS_SOS BIT(2) |
| 49 | #define DIGITAL_ATTRIB_P2_LISTEN_POLL_1 (0x0 << 6) |
| 50 | #define DIGITAL_ATTRIB_P2_POLL_LISTEN_1 (0x0 << 4) |
| 51 | #define DIGITAL_ATTRIB_P2_MAX_FRAME_256 0x8 |
| 52 | #define DIGITAL_ATTRIB_P4_DID(n) ((n) & 0xf) |
| 53 | |
Thierry Escande | 8c0695e4 | 2013-09-19 17:55:28 +0200 | [diff] [blame] | 54 | #define DIGITAL_CMD_SENSF_REQ 0x00 |
| 55 | #define DIGITAL_CMD_SENSF_RES 0x01 |
| 56 | |
| 57 | #define DIGITAL_SENSF_RES_MIN_LENGTH 17 |
| 58 | #define DIGITAL_SENSF_RES_RD_AP_B1 0x00 |
| 59 | #define DIGITAL_SENSF_RES_RD_AP_B2 0x8F |
| 60 | |
| 61 | #define DIGITAL_SENSF_REQ_RC_NONE 0 |
| 62 | #define DIGITAL_SENSF_REQ_RC_SC 1 |
| 63 | #define DIGITAL_SENSF_REQ_RC_AP 2 |
| 64 | |
Mark A. Greer | a381d48 | 2014-01-21 16:23:59 -0700 | [diff] [blame] | 65 | #define DIGITAL_CMD_ISO15693_INVENTORY_REQ 0x01 |
| 66 | |
| 67 | #define DIGITAL_ISO15693_REQ_FLAG_DATA_RATE BIT(1) |
| 68 | #define DIGITAL_ISO15693_REQ_FLAG_INVENTORY BIT(2) |
| 69 | #define DIGITAL_ISO15693_REQ_FLAG_NB_SLOTS BIT(5) |
| 70 | #define DIGITAL_ISO15693_RES_FLAG_ERROR BIT(0) |
| 71 | #define DIGITAL_ISO15693_RES_IS_VALID(flags) \ |
| 72 | (!((flags) & DIGITAL_ISO15693_RES_FLAG_ERROR)) |
| 73 | |
Thierry Escande | c813007 | 2014-01-27 00:31:32 +0100 | [diff] [blame] | 74 | #define DIGITAL_ISO_DEP_I_PCB 0x02 |
| 75 | #define DIGITAL_ISO_DEP_PNI(pni) ((pni) & 0x01) |
| 76 | |
| 77 | #define DIGITAL_ISO_DEP_PCB_TYPE(pcb) ((pcb) & 0xC0) |
| 78 | |
| 79 | #define DIGITAL_ISO_DEP_I_BLOCK 0x00 |
| 80 | |
| 81 | #define DIGITAL_ISO_DEP_BLOCK_HAS_DID(pcb) ((pcb) & 0x08) |
| 82 | |
Thierry Escande | 12e3d24 | 2014-01-27 00:31:31 +0100 | [diff] [blame] | 83 | static const u8 digital_ats_fsc[] = { |
| 84 | 16, 24, 32, 40, 48, 64, 96, 128, |
| 85 | }; |
| 86 | |
| 87 | #define DIGITAL_ATS_FSCI(t0) ((t0) & 0x0F) |
Mark A. Greer | 2473460 | 2014-03-31 17:36:38 -0700 | [diff] [blame] | 88 | #define DIGITAL_SENSB_FSCI(pi2) (((pi2) & 0xF0) >> 4) |
Thierry Escande | 12e3d24 | 2014-01-27 00:31:31 +0100 | [diff] [blame] | 89 | #define DIGITAL_ATS_MAX_FSC 256 |
| 90 | |
| 91 | #define DIGITAL_RATS_BYTE1 0xE0 |
| 92 | #define DIGITAL_RATS_PARAM 0x80 |
| 93 | |
Thierry Escande | 2c66dae | 2013-09-19 17:55:27 +0200 | [diff] [blame] | 94 | struct digital_sdd_res { |
| 95 | u8 nfcid1[4]; |
| 96 | u8 bcc; |
| 97 | } __packed; |
| 98 | |
| 99 | struct digital_sel_req { |
| 100 | u8 sel_cmd; |
| 101 | u8 b2; |
| 102 | u8 nfcid1[4]; |
| 103 | u8 bcc; |
| 104 | } __packed; |
| 105 | |
Mark A. Greer | 2473460 | 2014-03-31 17:36:38 -0700 | [diff] [blame] | 106 | struct digital_sensb_req { |
| 107 | u8 cmd; |
| 108 | u8 afi; |
| 109 | u8 param; |
| 110 | } __packed; |
| 111 | |
| 112 | struct digital_sensb_res { |
| 113 | u8 cmd; |
| 114 | u8 nfcid0[4]; |
| 115 | u8 app_data[4]; |
| 116 | u8 proto_info[3]; |
| 117 | } __packed; |
| 118 | |
| 119 | struct digital_attrib_req { |
| 120 | u8 cmd; |
| 121 | u8 nfcid0[4]; |
| 122 | u8 param1; |
| 123 | u8 param2; |
| 124 | u8 param3; |
| 125 | u8 param4; |
| 126 | } __packed; |
| 127 | |
| 128 | struct digital_attrib_res { |
| 129 | u8 mbli_did; |
| 130 | } __packed; |
| 131 | |
Thierry Escande | 8c0695e4 | 2013-09-19 17:55:28 +0200 | [diff] [blame] | 132 | struct digital_sensf_req { |
| 133 | u8 cmd; |
| 134 | u8 sc1; |
| 135 | u8 sc2; |
| 136 | u8 rc; |
| 137 | u8 tsn; |
| 138 | } __packed; |
| 139 | |
| 140 | struct digital_sensf_res { |
| 141 | u8 cmd; |
| 142 | u8 nfcid2[8]; |
| 143 | u8 pad0[2]; |
| 144 | u8 pad1[3]; |
| 145 | u8 mrti_check; |
| 146 | u8 mrti_update; |
| 147 | u8 pad2; |
| 148 | u8 rd[2]; |
| 149 | } __packed; |
| 150 | |
Mark A. Greer | a381d48 | 2014-01-21 16:23:59 -0700 | [diff] [blame] | 151 | struct digital_iso15693_inv_req { |
| 152 | u8 flags; |
| 153 | u8 cmd; |
| 154 | u8 mask_len; |
| 155 | u64 mask; |
| 156 | } __packed; |
| 157 | |
| 158 | struct digital_iso15693_inv_res { |
| 159 | u8 flags; |
| 160 | u8 dsfid; |
| 161 | u64 uid; |
| 162 | } __packed; |
| 163 | |
Thierry Escande | 2c66dae | 2013-09-19 17:55:27 +0200 | [diff] [blame] | 164 | static int digital_in_send_sdd_req(struct nfc_digital_dev *ddev, |
| 165 | struct nfc_target *target); |
| 166 | |
Thierry Escande | c813007 | 2014-01-27 00:31:32 +0100 | [diff] [blame] | 167 | int digital_in_iso_dep_pull_sod(struct nfc_digital_dev *ddev, |
| 168 | struct sk_buff *skb) |
| 169 | { |
| 170 | u8 pcb; |
| 171 | u8 block_type; |
| 172 | |
| 173 | if (skb->len < 1) |
| 174 | return -EIO; |
| 175 | |
| 176 | pcb = *skb->data; |
| 177 | block_type = DIGITAL_ISO_DEP_PCB_TYPE(pcb); |
| 178 | |
| 179 | /* No support fo R-block nor S-block */ |
| 180 | if (block_type != DIGITAL_ISO_DEP_I_BLOCK) { |
| 181 | pr_err("ISO_DEP R-block and S-block not supported\n"); |
| 182 | return -EIO; |
| 183 | } |
| 184 | |
| 185 | if (DIGITAL_ISO_DEP_BLOCK_HAS_DID(pcb)) { |
| 186 | pr_err("DID field in ISO_DEP PCB not supported\n"); |
| 187 | return -EIO; |
| 188 | } |
| 189 | |
| 190 | skb_pull(skb, 1); |
| 191 | |
| 192 | return 0; |
| 193 | } |
| 194 | |
| 195 | int digital_in_iso_dep_push_sod(struct nfc_digital_dev *ddev, |
| 196 | struct sk_buff *skb) |
| 197 | { |
| 198 | /* |
| 199 | * Chaining not supported so skb->len + 1 PCB byte + 2 CRC bytes must |
| 200 | * not be greater than remote FSC |
| 201 | */ |
| 202 | if (skb->len + 3 > ddev->target_fsc) |
| 203 | return -EIO; |
| 204 | |
| 205 | skb_push(skb, 1); |
| 206 | |
| 207 | *skb->data = DIGITAL_ISO_DEP_I_PCB | ddev->curr_nfc_dep_pni; |
| 208 | |
| 209 | ddev->curr_nfc_dep_pni = |
| 210 | DIGITAL_ISO_DEP_PNI(ddev->curr_nfc_dep_pni + 1); |
| 211 | |
| 212 | return 0; |
| 213 | } |
| 214 | |
Thierry Escande | 12e3d24 | 2014-01-27 00:31:31 +0100 | [diff] [blame] | 215 | static void digital_in_recv_ats(struct nfc_digital_dev *ddev, void *arg, |
| 216 | struct sk_buff *resp) |
| 217 | { |
| 218 | struct nfc_target *target = arg; |
| 219 | u8 fsdi; |
| 220 | int rc; |
| 221 | |
| 222 | if (IS_ERR(resp)) { |
| 223 | rc = PTR_ERR(resp); |
| 224 | resp = NULL; |
| 225 | goto exit; |
| 226 | } |
| 227 | |
| 228 | if (resp->len < 2) { |
| 229 | rc = -EIO; |
| 230 | goto exit; |
| 231 | } |
| 232 | |
| 233 | fsdi = DIGITAL_ATS_FSCI(resp->data[1]); |
| 234 | if (fsdi >= 8) |
| 235 | ddev->target_fsc = DIGITAL_ATS_MAX_FSC; |
| 236 | else |
| 237 | ddev->target_fsc = digital_ats_fsc[fsdi]; |
| 238 | |
| 239 | ddev->curr_nfc_dep_pni = 0; |
| 240 | |
| 241 | rc = digital_target_found(ddev, target, NFC_PROTO_ISO14443); |
| 242 | |
| 243 | exit: |
| 244 | dev_kfree_skb(resp); |
| 245 | kfree(target); |
| 246 | |
| 247 | if (rc) |
| 248 | digital_poll_next_tech(ddev); |
| 249 | } |
| 250 | |
| 251 | static int digital_in_send_rats(struct nfc_digital_dev *ddev, |
| 252 | struct nfc_target *target) |
| 253 | { |
| 254 | int rc; |
| 255 | struct sk_buff *skb; |
| 256 | |
| 257 | skb = digital_skb_alloc(ddev, 2); |
| 258 | if (!skb) |
| 259 | return -ENOMEM; |
| 260 | |
Johannes Berg | 634fef6 | 2017-06-16 14:29:24 +0200 | [diff] [blame] | 261 | skb_put_u8(skb, DIGITAL_RATS_BYTE1); |
| 262 | skb_put_u8(skb, DIGITAL_RATS_PARAM); |
Thierry Escande | 12e3d24 | 2014-01-27 00:31:31 +0100 | [diff] [blame] | 263 | |
| 264 | rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_ats, |
| 265 | target); |
| 266 | if (rc) |
| 267 | kfree_skb(skb); |
| 268 | |
| 269 | return rc; |
| 270 | } |
| 271 | |
Thierry Escande | 2c66dae | 2013-09-19 17:55:27 +0200 | [diff] [blame] | 272 | static void digital_in_recv_sel_res(struct nfc_digital_dev *ddev, void *arg, |
| 273 | struct sk_buff *resp) |
| 274 | { |
| 275 | struct nfc_target *target = arg; |
| 276 | int rc; |
| 277 | u8 sel_res; |
| 278 | u8 nfc_proto; |
| 279 | |
| 280 | if (IS_ERR(resp)) { |
| 281 | rc = PTR_ERR(resp); |
| 282 | resp = NULL; |
| 283 | goto exit; |
| 284 | } |
| 285 | |
| 286 | if (!DIGITAL_DRV_CAPS_IN_CRC(ddev)) { |
| 287 | rc = digital_skb_check_crc_a(resp); |
| 288 | if (rc) { |
| 289 | PROTOCOL_ERR("4.4.1.3"); |
| 290 | goto exit; |
| 291 | } |
| 292 | } |
| 293 | |
Mark Greer | 7f9f171 | 2017-06-15 10:46:15 -0700 | [diff] [blame] | 294 | if (resp->len != DIGITAL_SEL_RES_LEN) { |
Thierry Escande | 2c66dae | 2013-09-19 17:55:27 +0200 | [diff] [blame] | 295 | rc = -EIO; |
| 296 | goto exit; |
| 297 | } |
| 298 | |
| 299 | sel_res = resp->data[0]; |
| 300 | |
| 301 | if (!DIGITAL_SEL_RES_NFCID1_COMPLETE(sel_res)) { |
| 302 | rc = digital_in_send_sdd_req(ddev, target); |
| 303 | if (rc) |
| 304 | goto exit; |
| 305 | |
| 306 | goto exit_free_skb; |
| 307 | } |
| 308 | |
Thierry Escande | 12e3d24 | 2014-01-27 00:31:31 +0100 | [diff] [blame] | 309 | target->sel_res = sel_res; |
| 310 | |
Thierry Escande | 2c66dae | 2013-09-19 17:55:27 +0200 | [diff] [blame] | 311 | if (DIGITAL_SEL_RES_IS_T2T(sel_res)) { |
| 312 | nfc_proto = NFC_PROTO_MIFARE; |
Mark A. Greer | 4b4dbca | 2014-07-02 09:01:56 -0700 | [diff] [blame] | 313 | } else if (DIGITAL_SEL_RES_IS_NFC_DEP(sel_res)) { |
| 314 | nfc_proto = NFC_PROTO_NFC_DEP; |
Thierry Escande | 12e3d24 | 2014-01-27 00:31:31 +0100 | [diff] [blame] | 315 | } else if (DIGITAL_SEL_RES_IS_T4T(sel_res)) { |
| 316 | rc = digital_in_send_rats(ddev, target); |
| 317 | if (rc) |
| 318 | goto exit; |
| 319 | /* |
| 320 | * Skip target_found and don't free it for now. This will be |
| 321 | * done when receiving the ATS |
| 322 | */ |
| 323 | goto exit_free_skb; |
Thierry Escande | 2c66dae | 2013-09-19 17:55:27 +0200 | [diff] [blame] | 324 | } else { |
| 325 | rc = -EOPNOTSUPP; |
| 326 | goto exit; |
| 327 | } |
| 328 | |
Thierry Escande | 2c66dae | 2013-09-19 17:55:27 +0200 | [diff] [blame] | 329 | rc = digital_target_found(ddev, target, nfc_proto); |
| 330 | |
| 331 | exit: |
| 332 | kfree(target); |
| 333 | |
| 334 | exit_free_skb: |
| 335 | dev_kfree_skb(resp); |
| 336 | |
| 337 | if (rc) |
| 338 | digital_poll_next_tech(ddev); |
| 339 | } |
| 340 | |
| 341 | static int digital_in_send_sel_req(struct nfc_digital_dev *ddev, |
| 342 | struct nfc_target *target, |
| 343 | struct digital_sdd_res *sdd_res) |
| 344 | { |
| 345 | struct sk_buff *skb; |
| 346 | struct digital_sel_req *sel_req; |
| 347 | u8 sel_cmd; |
| 348 | int rc; |
| 349 | |
| 350 | skb = digital_skb_alloc(ddev, sizeof(struct digital_sel_req)); |
| 351 | if (!skb) |
| 352 | return -ENOMEM; |
| 353 | |
| 354 | skb_put(skb, sizeof(struct digital_sel_req)); |
| 355 | sel_req = (struct digital_sel_req *)skb->data; |
| 356 | |
| 357 | if (target->nfcid1_len <= 4) |
| 358 | sel_cmd = DIGITAL_CMD_SEL_REQ_CL1; |
| 359 | else if (target->nfcid1_len < 10) |
| 360 | sel_cmd = DIGITAL_CMD_SEL_REQ_CL2; |
| 361 | else |
| 362 | sel_cmd = DIGITAL_CMD_SEL_REQ_CL3; |
| 363 | |
| 364 | sel_req->sel_cmd = sel_cmd; |
| 365 | sel_req->b2 = 0x70; |
| 366 | memcpy(sel_req->nfcid1, sdd_res->nfcid1, 4); |
| 367 | sel_req->bcc = sdd_res->bcc; |
| 368 | |
| 369 | if (DIGITAL_DRV_CAPS_IN_CRC(ddev)) { |
| 370 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, |
| 371 | NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A); |
| 372 | if (rc) |
| 373 | goto exit; |
| 374 | } else { |
| 375 | digital_skb_add_crc_a(skb); |
| 376 | } |
| 377 | |
| 378 | rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sel_res, |
| 379 | target); |
| 380 | exit: |
| 381 | if (rc) |
| 382 | kfree_skb(skb); |
| 383 | |
| 384 | return rc; |
| 385 | } |
| 386 | |
| 387 | static void digital_in_recv_sdd_res(struct nfc_digital_dev *ddev, void *arg, |
| 388 | struct sk_buff *resp) |
| 389 | { |
| 390 | struct nfc_target *target = arg; |
| 391 | struct digital_sdd_res *sdd_res; |
| 392 | int rc; |
| 393 | u8 offset, size; |
| 394 | u8 i, bcc; |
| 395 | |
| 396 | if (IS_ERR(resp)) { |
| 397 | rc = PTR_ERR(resp); |
| 398 | resp = NULL; |
| 399 | goto exit; |
| 400 | } |
| 401 | |
| 402 | if (resp->len < DIGITAL_SDD_RES_LEN) { |
| 403 | PROTOCOL_ERR("4.7.2.8"); |
| 404 | rc = -EINVAL; |
| 405 | goto exit; |
| 406 | } |
| 407 | |
| 408 | sdd_res = (struct digital_sdd_res *)resp->data; |
| 409 | |
| 410 | for (i = 0, bcc = 0; i < 4; i++) |
| 411 | bcc ^= sdd_res->nfcid1[i]; |
| 412 | |
| 413 | if (bcc != sdd_res->bcc) { |
| 414 | PROTOCOL_ERR("4.7.2.6"); |
| 415 | rc = -EINVAL; |
| 416 | goto exit; |
| 417 | } |
| 418 | |
| 419 | if (sdd_res->nfcid1[0] == DIGITAL_SDD_RES_CT) { |
| 420 | offset = 1; |
| 421 | size = 3; |
| 422 | } else { |
| 423 | offset = 0; |
| 424 | size = 4; |
| 425 | } |
| 426 | |
| 427 | memcpy(target->nfcid1 + target->nfcid1_len, sdd_res->nfcid1 + offset, |
| 428 | size); |
| 429 | target->nfcid1_len += size; |
| 430 | |
| 431 | rc = digital_in_send_sel_req(ddev, target, sdd_res); |
| 432 | |
| 433 | exit: |
| 434 | dev_kfree_skb(resp); |
| 435 | |
| 436 | if (rc) { |
| 437 | kfree(target); |
| 438 | digital_poll_next_tech(ddev); |
| 439 | } |
| 440 | } |
| 441 | |
| 442 | static int digital_in_send_sdd_req(struct nfc_digital_dev *ddev, |
| 443 | struct nfc_target *target) |
| 444 | { |
| 445 | int rc; |
| 446 | struct sk_buff *skb; |
| 447 | u8 sel_cmd; |
| 448 | |
| 449 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, |
| 450 | NFC_DIGITAL_FRAMING_NFCA_STANDARD); |
| 451 | if (rc) |
| 452 | return rc; |
| 453 | |
| 454 | skb = digital_skb_alloc(ddev, 2); |
Samuel Ortiz | 2604253 | 2013-09-20 16:56:40 +0200 | [diff] [blame] | 455 | if (!skb) |
Thierry Escande | 2c66dae | 2013-09-19 17:55:27 +0200 | [diff] [blame] | 456 | return -ENOMEM; |
Thierry Escande | 2c66dae | 2013-09-19 17:55:27 +0200 | [diff] [blame] | 457 | |
| 458 | if (target->nfcid1_len == 0) |
| 459 | sel_cmd = DIGITAL_CMD_SEL_REQ_CL1; |
| 460 | else if (target->nfcid1_len == 3) |
| 461 | sel_cmd = DIGITAL_CMD_SEL_REQ_CL2; |
| 462 | else |
| 463 | sel_cmd = DIGITAL_CMD_SEL_REQ_CL3; |
| 464 | |
Johannes Berg | 634fef6 | 2017-06-16 14:29:24 +0200 | [diff] [blame] | 465 | skb_put_u8(skb, sel_cmd); |
| 466 | skb_put_u8(skb, DIGITAL_SDD_REQ_SEL_PAR); |
Thierry Escande | 2c66dae | 2013-09-19 17:55:27 +0200 | [diff] [blame] | 467 | |
| 468 | return digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sdd_res, |
| 469 | target); |
| 470 | } |
| 471 | |
Thierry Escande | 59ee236 | 2013-09-19 17:55:26 +0200 | [diff] [blame] | 472 | static void digital_in_recv_sens_res(struct nfc_digital_dev *ddev, void *arg, |
| 473 | struct sk_buff *resp) |
| 474 | { |
Thierry Escande | 2c66dae | 2013-09-19 17:55:27 +0200 | [diff] [blame] | 475 | struct nfc_target *target = NULL; |
Thierry Escande | 2c66dae | 2013-09-19 17:55:27 +0200 | [diff] [blame] | 476 | int rc; |
Thierry Escande | 59ee236 | 2013-09-19 17:55:26 +0200 | [diff] [blame] | 477 | |
Thierry Escande | 2c66dae | 2013-09-19 17:55:27 +0200 | [diff] [blame] | 478 | if (IS_ERR(resp)) { |
| 479 | rc = PTR_ERR(resp); |
| 480 | resp = NULL; |
| 481 | goto exit; |
| 482 | } |
| 483 | |
| 484 | if (resp->len < sizeof(u16)) { |
| 485 | rc = -EIO; |
| 486 | goto exit; |
| 487 | } |
| 488 | |
| 489 | target = kzalloc(sizeof(struct nfc_target), GFP_KERNEL); |
| 490 | if (!target) { |
| 491 | rc = -ENOMEM; |
| 492 | goto exit; |
| 493 | } |
| 494 | |
Thierry Escande | 13292c9 | 2013-09-24 11:47:34 +0200 | [diff] [blame] | 495 | target->sens_res = __le16_to_cpu(*(__le16 *)resp->data); |
Thierry Escande | 2c66dae | 2013-09-19 17:55:27 +0200 | [diff] [blame] | 496 | |
Thierry Escande | 13292c9 | 2013-09-24 11:47:34 +0200 | [diff] [blame] | 497 | if (!DIGITAL_SENS_RES_IS_VALID(target->sens_res)) { |
Thierry Escande | 2c66dae | 2013-09-19 17:55:27 +0200 | [diff] [blame] | 498 | PROTOCOL_ERR("4.6.3.3"); |
| 499 | rc = -EINVAL; |
| 500 | goto exit; |
| 501 | } |
| 502 | |
Thierry Escande | 13292c9 | 2013-09-24 11:47:34 +0200 | [diff] [blame] | 503 | if (DIGITAL_SENS_RES_IS_T1T(target->sens_res)) |
Thierry Escande | 2c66dae | 2013-09-19 17:55:27 +0200 | [diff] [blame] | 504 | rc = digital_target_found(ddev, target, NFC_PROTO_JEWEL); |
| 505 | else |
| 506 | rc = digital_in_send_sdd_req(ddev, target); |
| 507 | |
| 508 | exit: |
| 509 | dev_kfree_skb(resp); |
| 510 | |
| 511 | if (rc) { |
| 512 | kfree(target); |
| 513 | digital_poll_next_tech(ddev); |
| 514 | } |
Thierry Escande | 59ee236 | 2013-09-19 17:55:26 +0200 | [diff] [blame] | 515 | } |
| 516 | |
| 517 | int digital_in_send_sens_req(struct nfc_digital_dev *ddev, u8 rf_tech) |
| 518 | { |
| 519 | struct sk_buff *skb; |
| 520 | int rc; |
| 521 | |
| 522 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, |
| 523 | NFC_DIGITAL_RF_TECH_106A); |
| 524 | if (rc) |
| 525 | return rc; |
| 526 | |
| 527 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, |
| 528 | NFC_DIGITAL_FRAMING_NFCA_SHORT); |
| 529 | if (rc) |
| 530 | return rc; |
| 531 | |
| 532 | skb = digital_skb_alloc(ddev, 1); |
| 533 | if (!skb) |
| 534 | return -ENOMEM; |
| 535 | |
Johannes Berg | 634fef6 | 2017-06-16 14:29:24 +0200 | [diff] [blame] | 536 | skb_put_u8(skb, DIGITAL_CMD_SENS_REQ); |
Thierry Escande | 59ee236 | 2013-09-19 17:55:26 +0200 | [diff] [blame] | 537 | |
| 538 | rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sens_res, NULL); |
| 539 | if (rc) |
| 540 | kfree_skb(skb); |
| 541 | |
| 542 | return rc; |
| 543 | } |
Thierry Escande | 2c66dae | 2013-09-19 17:55:27 +0200 | [diff] [blame] | 544 | |
| 545 | int digital_in_recv_mifare_res(struct sk_buff *resp) |
| 546 | { |
| 547 | /* Successful READ command response is 16 data bytes + 2 CRC bytes long. |
| 548 | * Since the driver can't differentiate a ACK/NACK response from a valid |
| 549 | * READ response, the CRC calculation must be handled at digital level |
| 550 | * even if the driver supports it for this technology. |
| 551 | */ |
| 552 | if (resp->len == DIGITAL_MIFARE_READ_RES_LEN + DIGITAL_CRC_LEN) { |
| 553 | if (digital_skb_check_crc_a(resp)) { |
| 554 | PROTOCOL_ERR("9.4.1.2"); |
| 555 | return -EIO; |
| 556 | } |
| 557 | |
| 558 | return 0; |
| 559 | } |
| 560 | |
| 561 | /* ACK response (i.e. successful WRITE). */ |
| 562 | if (resp->len == 1 && resp->data[0] == DIGITAL_MIFARE_ACK_RES) { |
| 563 | resp->data[0] = 0; |
| 564 | return 0; |
| 565 | } |
| 566 | |
| 567 | /* NACK and any other responses are treated as error. */ |
| 568 | return -EIO; |
| 569 | } |
Thierry Escande | 8c0695e4 | 2013-09-19 17:55:28 +0200 | [diff] [blame] | 570 | |
Mark A. Greer | 2473460 | 2014-03-31 17:36:38 -0700 | [diff] [blame] | 571 | static void digital_in_recv_attrib_res(struct nfc_digital_dev *ddev, void *arg, |
| 572 | struct sk_buff *resp) |
| 573 | { |
| 574 | struct nfc_target *target = arg; |
| 575 | struct digital_attrib_res *attrib_res; |
| 576 | int rc; |
| 577 | |
| 578 | if (IS_ERR(resp)) { |
| 579 | rc = PTR_ERR(resp); |
| 580 | resp = NULL; |
| 581 | goto exit; |
| 582 | } |
| 583 | |
| 584 | if (resp->len < sizeof(*attrib_res)) { |
| 585 | PROTOCOL_ERR("12.6.2"); |
| 586 | rc = -EIO; |
| 587 | goto exit; |
| 588 | } |
| 589 | |
| 590 | attrib_res = (struct digital_attrib_res *)resp->data; |
| 591 | |
| 592 | if (attrib_res->mbli_did & 0x0f) { |
| 593 | PROTOCOL_ERR("12.6.2.1"); |
| 594 | rc = -EIO; |
| 595 | goto exit; |
| 596 | } |
| 597 | |
| 598 | rc = digital_target_found(ddev, target, NFC_PROTO_ISO14443_B); |
| 599 | |
| 600 | exit: |
| 601 | dev_kfree_skb(resp); |
| 602 | kfree(target); |
| 603 | |
| 604 | if (rc) |
| 605 | digital_poll_next_tech(ddev); |
| 606 | } |
| 607 | |
Fengguang Wu | cb30caf | 2014-05-26 00:52:15 +0200 | [diff] [blame] | 608 | static int digital_in_send_attrib_req(struct nfc_digital_dev *ddev, |
Mark A. Greer | 2473460 | 2014-03-31 17:36:38 -0700 | [diff] [blame] | 609 | struct nfc_target *target, |
| 610 | struct digital_sensb_res *sensb_res) |
| 611 | { |
| 612 | struct digital_attrib_req *attrib_req; |
| 613 | struct sk_buff *skb; |
| 614 | int rc; |
| 615 | |
| 616 | skb = digital_skb_alloc(ddev, sizeof(*attrib_req)); |
| 617 | if (!skb) |
| 618 | return -ENOMEM; |
| 619 | |
Johannes Berg | 4df864c | 2017-06-16 14:29:21 +0200 | [diff] [blame] | 620 | attrib_req = skb_put(skb, sizeof(*attrib_req)); |
Mark A. Greer | 2473460 | 2014-03-31 17:36:38 -0700 | [diff] [blame] | 621 | |
| 622 | attrib_req->cmd = DIGITAL_CMD_ATTRIB_REQ; |
| 623 | memcpy(attrib_req->nfcid0, sensb_res->nfcid0, |
| 624 | sizeof(attrib_req->nfcid0)); |
| 625 | attrib_req->param1 = DIGITAL_ATTRIB_P1_TR0_DEFAULT | |
| 626 | DIGITAL_ATTRIB_P1_TR1_DEFAULT; |
| 627 | attrib_req->param2 = DIGITAL_ATTRIB_P2_LISTEN_POLL_1 | |
| 628 | DIGITAL_ATTRIB_P2_POLL_LISTEN_1 | |
| 629 | DIGITAL_ATTRIB_P2_MAX_FRAME_256; |
| 630 | attrib_req->param3 = sensb_res->proto_info[1] & 0x07; |
| 631 | attrib_req->param4 = DIGITAL_ATTRIB_P4_DID(0); |
| 632 | |
| 633 | rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_attrib_res, |
| 634 | target); |
| 635 | if (rc) |
| 636 | kfree_skb(skb); |
| 637 | |
| 638 | return rc; |
| 639 | } |
| 640 | |
| 641 | static void digital_in_recv_sensb_res(struct nfc_digital_dev *ddev, void *arg, |
| 642 | struct sk_buff *resp) |
| 643 | { |
| 644 | struct nfc_target *target = NULL; |
| 645 | struct digital_sensb_res *sensb_res; |
| 646 | u8 fsci; |
| 647 | int rc; |
| 648 | |
| 649 | if (IS_ERR(resp)) { |
| 650 | rc = PTR_ERR(resp); |
| 651 | resp = NULL; |
| 652 | goto exit; |
| 653 | } |
| 654 | |
| 655 | if (resp->len != sizeof(*sensb_res)) { |
| 656 | PROTOCOL_ERR("5.6.2.1"); |
| 657 | rc = -EIO; |
| 658 | goto exit; |
| 659 | } |
| 660 | |
| 661 | sensb_res = (struct digital_sensb_res *)resp->data; |
| 662 | |
| 663 | if (sensb_res->cmd != DIGITAL_CMD_SENSB_RES) { |
| 664 | PROTOCOL_ERR("5.6.2"); |
| 665 | rc = -EIO; |
| 666 | goto exit; |
| 667 | } |
| 668 | |
| 669 | if (!(sensb_res->proto_info[1] & BIT(0))) { |
| 670 | PROTOCOL_ERR("5.6.2.12"); |
| 671 | rc = -EIO; |
| 672 | goto exit; |
| 673 | } |
| 674 | |
| 675 | if (sensb_res->proto_info[1] & BIT(3)) { |
| 676 | PROTOCOL_ERR("5.6.2.16"); |
| 677 | rc = -EIO; |
| 678 | goto exit; |
| 679 | } |
| 680 | |
| 681 | fsci = DIGITAL_SENSB_FSCI(sensb_res->proto_info[1]); |
| 682 | if (fsci >= 8) |
| 683 | ddev->target_fsc = DIGITAL_ATS_MAX_FSC; |
| 684 | else |
| 685 | ddev->target_fsc = digital_ats_fsc[fsci]; |
| 686 | |
| 687 | target = kzalloc(sizeof(struct nfc_target), GFP_KERNEL); |
| 688 | if (!target) { |
| 689 | rc = -ENOMEM; |
| 690 | goto exit; |
| 691 | } |
| 692 | |
| 693 | rc = digital_in_send_attrib_req(ddev, target, sensb_res); |
| 694 | |
| 695 | exit: |
| 696 | dev_kfree_skb(resp); |
| 697 | |
| 698 | if (rc) { |
| 699 | kfree(target); |
| 700 | digital_poll_next_tech(ddev); |
| 701 | } |
| 702 | } |
| 703 | |
| 704 | int digital_in_send_sensb_req(struct nfc_digital_dev *ddev, u8 rf_tech) |
| 705 | { |
| 706 | struct digital_sensb_req *sensb_req; |
| 707 | struct sk_buff *skb; |
| 708 | int rc; |
| 709 | |
| 710 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, |
| 711 | NFC_DIGITAL_RF_TECH_106B); |
| 712 | if (rc) |
| 713 | return rc; |
| 714 | |
| 715 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, |
| 716 | NFC_DIGITAL_FRAMING_NFCB); |
| 717 | if (rc) |
| 718 | return rc; |
| 719 | |
| 720 | skb = digital_skb_alloc(ddev, sizeof(*sensb_req)); |
| 721 | if (!skb) |
| 722 | return -ENOMEM; |
| 723 | |
Johannes Berg | 4df864c | 2017-06-16 14:29:21 +0200 | [diff] [blame] | 724 | sensb_req = skb_put(skb, sizeof(*sensb_req)); |
Mark A. Greer | 2473460 | 2014-03-31 17:36:38 -0700 | [diff] [blame] | 725 | |
| 726 | sensb_req->cmd = DIGITAL_CMD_SENSB_REQ; |
| 727 | sensb_req->afi = 0x00; /* All families and sub-families */ |
| 728 | sensb_req->param = DIGITAL_SENSB_N(0); |
| 729 | |
| 730 | rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sensb_res, |
| 731 | NULL); |
| 732 | if (rc) |
| 733 | kfree_skb(skb); |
| 734 | |
| 735 | return rc; |
| 736 | } |
| 737 | |
Thierry Escande | 8c0695e4 | 2013-09-19 17:55:28 +0200 | [diff] [blame] | 738 | static void digital_in_recv_sensf_res(struct nfc_digital_dev *ddev, void *arg, |
| 739 | struct sk_buff *resp) |
| 740 | { |
| 741 | int rc; |
Thierry Escande | 7d0911c | 2013-09-19 17:55:29 +0200 | [diff] [blame] | 742 | u8 proto; |
Thierry Escande | 8c0695e4 | 2013-09-19 17:55:28 +0200 | [diff] [blame] | 743 | struct nfc_target target; |
| 744 | struct digital_sensf_res *sensf_res; |
| 745 | |
| 746 | if (IS_ERR(resp)) { |
| 747 | rc = PTR_ERR(resp); |
| 748 | resp = NULL; |
| 749 | goto exit; |
| 750 | } |
| 751 | |
| 752 | if (resp->len < DIGITAL_SENSF_RES_MIN_LENGTH) { |
| 753 | rc = -EIO; |
| 754 | goto exit; |
| 755 | } |
| 756 | |
| 757 | if (!DIGITAL_DRV_CAPS_IN_CRC(ddev)) { |
| 758 | rc = digital_skb_check_crc_f(resp); |
| 759 | if (rc) { |
| 760 | PROTOCOL_ERR("6.4.1.8"); |
| 761 | goto exit; |
| 762 | } |
| 763 | } |
| 764 | |
| 765 | skb_pull(resp, 1); |
| 766 | |
| 767 | memset(&target, 0, sizeof(struct nfc_target)); |
| 768 | |
| 769 | sensf_res = (struct digital_sensf_res *)resp->data; |
| 770 | |
| 771 | memcpy(target.sensf_res, sensf_res, resp->len); |
| 772 | target.sensf_res_len = resp->len; |
| 773 | |
| 774 | memcpy(target.nfcid2, sensf_res->nfcid2, NFC_NFCID2_MAXSIZE); |
| 775 | target.nfcid2_len = NFC_NFCID2_MAXSIZE; |
| 776 | |
Thierry Escande | 7d0911c | 2013-09-19 17:55:29 +0200 | [diff] [blame] | 777 | if (target.nfcid2[0] == DIGITAL_SENSF_NFCID2_NFC_DEP_B1 && |
| 778 | target.nfcid2[1] == DIGITAL_SENSF_NFCID2_NFC_DEP_B2) |
| 779 | proto = NFC_PROTO_NFC_DEP; |
| 780 | else |
| 781 | proto = NFC_PROTO_FELICA; |
| 782 | |
| 783 | rc = digital_target_found(ddev, &target, proto); |
Thierry Escande | 8c0695e4 | 2013-09-19 17:55:28 +0200 | [diff] [blame] | 784 | |
| 785 | exit: |
| 786 | dev_kfree_skb(resp); |
| 787 | |
| 788 | if (rc) |
| 789 | digital_poll_next_tech(ddev); |
| 790 | } |
| 791 | |
| 792 | int digital_in_send_sensf_req(struct nfc_digital_dev *ddev, u8 rf_tech) |
| 793 | { |
| 794 | struct digital_sensf_req *sensf_req; |
| 795 | struct sk_buff *skb; |
| 796 | int rc; |
| 797 | u8 size; |
| 798 | |
| 799 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, rf_tech); |
| 800 | if (rc) |
| 801 | return rc; |
| 802 | |
| 803 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, |
| 804 | NFC_DIGITAL_FRAMING_NFCF); |
| 805 | if (rc) |
| 806 | return rc; |
| 807 | |
| 808 | size = sizeof(struct digital_sensf_req); |
| 809 | |
| 810 | skb = digital_skb_alloc(ddev, size); |
| 811 | if (!skb) |
| 812 | return -ENOMEM; |
| 813 | |
| 814 | skb_put(skb, size); |
| 815 | |
| 816 | sensf_req = (struct digital_sensf_req *)skb->data; |
| 817 | sensf_req->cmd = DIGITAL_CMD_SENSF_REQ; |
| 818 | sensf_req->sc1 = 0xFF; |
| 819 | sensf_req->sc2 = 0xFF; |
| 820 | sensf_req->rc = 0; |
| 821 | sensf_req->tsn = 0; |
| 822 | |
Johannes Berg | d58ff35 | 2017-06-16 14:29:23 +0200 | [diff] [blame] | 823 | *(u8 *)skb_push(skb, 1) = size + 1; |
Thierry Escande | 8c0695e4 | 2013-09-19 17:55:28 +0200 | [diff] [blame] | 824 | |
| 825 | if (!DIGITAL_DRV_CAPS_IN_CRC(ddev)) |
| 826 | digital_skb_add_crc_f(skb); |
| 827 | |
| 828 | rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sensf_res, |
| 829 | NULL); |
| 830 | if (rc) |
| 831 | kfree_skb(skb); |
| 832 | |
| 833 | return rc; |
| 834 | } |
Thierry Escande | 1c7a4c2 | 2013-09-19 17:55:30 +0200 | [diff] [blame] | 835 | |
Mark A. Greer | a381d48 | 2014-01-21 16:23:59 -0700 | [diff] [blame] | 836 | static void digital_in_recv_iso15693_inv_res(struct nfc_digital_dev *ddev, |
| 837 | void *arg, struct sk_buff *resp) |
| 838 | { |
| 839 | struct digital_iso15693_inv_res *res; |
| 840 | struct nfc_target *target = NULL; |
| 841 | int rc; |
| 842 | |
| 843 | if (IS_ERR(resp)) { |
| 844 | rc = PTR_ERR(resp); |
| 845 | resp = NULL; |
| 846 | goto out_free_skb; |
| 847 | } |
| 848 | |
| 849 | if (resp->len != sizeof(*res)) { |
| 850 | rc = -EIO; |
| 851 | goto out_free_skb; |
| 852 | } |
| 853 | |
| 854 | res = (struct digital_iso15693_inv_res *)resp->data; |
| 855 | |
| 856 | if (!DIGITAL_ISO15693_RES_IS_VALID(res->flags)) { |
| 857 | PROTOCOL_ERR("ISO15693 - 10.3.1"); |
| 858 | rc = -EINVAL; |
| 859 | goto out_free_skb; |
| 860 | } |
| 861 | |
| 862 | target = kzalloc(sizeof(*target), GFP_KERNEL); |
| 863 | if (!target) { |
| 864 | rc = -ENOMEM; |
| 865 | goto out_free_skb; |
| 866 | } |
| 867 | |
| 868 | target->is_iso15693 = 1; |
| 869 | target->iso15693_dsfid = res->dsfid; |
| 870 | memcpy(target->iso15693_uid, &res->uid, sizeof(target->iso15693_uid)); |
| 871 | |
| 872 | rc = digital_target_found(ddev, target, NFC_PROTO_ISO15693); |
| 873 | |
| 874 | kfree(target); |
| 875 | |
| 876 | out_free_skb: |
| 877 | dev_kfree_skb(resp); |
| 878 | |
| 879 | if (rc) |
| 880 | digital_poll_next_tech(ddev); |
| 881 | } |
| 882 | |
| 883 | int digital_in_send_iso15693_inv_req(struct nfc_digital_dev *ddev, u8 rf_tech) |
| 884 | { |
| 885 | struct digital_iso15693_inv_req *req; |
| 886 | struct sk_buff *skb; |
| 887 | int rc; |
| 888 | |
| 889 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, |
| 890 | NFC_DIGITAL_RF_TECH_ISO15693); |
| 891 | if (rc) |
| 892 | return rc; |
| 893 | |
| 894 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, |
| 895 | NFC_DIGITAL_FRAMING_ISO15693_INVENTORY); |
| 896 | if (rc) |
| 897 | return rc; |
| 898 | |
| 899 | skb = digital_skb_alloc(ddev, sizeof(*req)); |
| 900 | if (!skb) |
| 901 | return -ENOMEM; |
| 902 | |
| 903 | skb_put(skb, sizeof(*req) - sizeof(req->mask)); /* No mask */ |
| 904 | req = (struct digital_iso15693_inv_req *)skb->data; |
| 905 | |
| 906 | /* Single sub-carrier, high data rate, no AFI, single slot |
| 907 | * Inventory command |
| 908 | */ |
| 909 | req->flags = DIGITAL_ISO15693_REQ_FLAG_DATA_RATE | |
| 910 | DIGITAL_ISO15693_REQ_FLAG_INVENTORY | |
| 911 | DIGITAL_ISO15693_REQ_FLAG_NB_SLOTS; |
| 912 | req->cmd = DIGITAL_CMD_ISO15693_INVENTORY_REQ; |
| 913 | req->mask_len = 0; |
| 914 | |
| 915 | rc = digital_in_send_cmd(ddev, skb, 30, |
| 916 | digital_in_recv_iso15693_inv_res, NULL); |
| 917 | if (rc) |
| 918 | kfree_skb(skb); |
| 919 | |
| 920 | return rc; |
| 921 | } |
| 922 | |
Thierry Escande | 1c7a4c2 | 2013-09-19 17:55:30 +0200 | [diff] [blame] | 923 | static int digital_tg_send_sel_res(struct nfc_digital_dev *ddev) |
| 924 | { |
| 925 | struct sk_buff *skb; |
| 926 | int rc; |
| 927 | |
| 928 | skb = digital_skb_alloc(ddev, 1); |
| 929 | if (!skb) |
| 930 | return -ENOMEM; |
| 931 | |
Johannes Berg | 634fef6 | 2017-06-16 14:29:24 +0200 | [diff] [blame] | 932 | skb_put_u8(skb, DIGITAL_SEL_RES_NFC_DEP); |
Thierry Escande | 1c7a4c2 | 2013-09-19 17:55:30 +0200 | [diff] [blame] | 933 | |
| 934 | if (!DIGITAL_DRV_CAPS_TG_CRC(ddev)) |
| 935 | digital_skb_add_crc_a(skb); |
| 936 | |
Mark A. Greer | 55537c7e | 2014-07-02 10:16:15 -0700 | [diff] [blame] | 937 | rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, |
| 938 | NFC_DIGITAL_FRAMING_NFCA_ANTICOL_COMPLETE); |
| 939 | if (rc) { |
| 940 | kfree_skb(skb); |
| 941 | return rc; |
| 942 | } |
| 943 | |
Thierry Escande | 1c7a4c2 | 2013-09-19 17:55:30 +0200 | [diff] [blame] | 944 | rc = digital_tg_send_cmd(ddev, skb, 300, digital_tg_recv_atr_req, |
| 945 | NULL); |
| 946 | if (rc) |
| 947 | kfree_skb(skb); |
| 948 | |
| 949 | return rc; |
| 950 | } |
| 951 | |
| 952 | static void digital_tg_recv_sel_req(struct nfc_digital_dev *ddev, void *arg, |
| 953 | struct sk_buff *resp) |
| 954 | { |
| 955 | int rc; |
| 956 | |
| 957 | if (IS_ERR(resp)) { |
| 958 | rc = PTR_ERR(resp); |
| 959 | resp = NULL; |
| 960 | goto exit; |
| 961 | } |
| 962 | |
| 963 | if (!DIGITAL_DRV_CAPS_TG_CRC(ddev)) { |
| 964 | rc = digital_skb_check_crc_a(resp); |
| 965 | if (rc) { |
| 966 | PROTOCOL_ERR("4.4.1.3"); |
| 967 | goto exit; |
| 968 | } |
| 969 | } |
| 970 | |
| 971 | /* Silently ignore SEL_REQ content and send a SEL_RES for NFC-DEP */ |
| 972 | |
| 973 | rc = digital_tg_send_sel_res(ddev); |
| 974 | |
| 975 | exit: |
| 976 | if (rc) |
| 977 | digital_poll_next_tech(ddev); |
| 978 | |
| 979 | dev_kfree_skb(resp); |
| 980 | } |
| 981 | |
| 982 | static int digital_tg_send_sdd_res(struct nfc_digital_dev *ddev) |
| 983 | { |
| 984 | struct sk_buff *skb; |
| 985 | struct digital_sdd_res *sdd_res; |
| 986 | int rc, i; |
| 987 | |
| 988 | skb = digital_skb_alloc(ddev, sizeof(struct digital_sdd_res)); |
| 989 | if (!skb) |
| 990 | return -ENOMEM; |
| 991 | |
| 992 | skb_put(skb, sizeof(struct digital_sdd_res)); |
| 993 | sdd_res = (struct digital_sdd_res *)skb->data; |
| 994 | |
| 995 | sdd_res->nfcid1[0] = 0x08; |
| 996 | get_random_bytes(sdd_res->nfcid1 + 1, 3); |
| 997 | |
| 998 | sdd_res->bcc = 0; |
| 999 | for (i = 0; i < 4; i++) |
| 1000 | sdd_res->bcc ^= sdd_res->nfcid1[i]; |
| 1001 | |
Mark A. Greer | 55537c7e | 2014-07-02 10:16:15 -0700 | [diff] [blame] | 1002 | rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, |
| 1003 | NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A); |
| 1004 | if (rc) { |
| 1005 | kfree_skb(skb); |
| 1006 | return rc; |
| 1007 | } |
| 1008 | |
Thierry Escande | 1c7a4c2 | 2013-09-19 17:55:30 +0200 | [diff] [blame] | 1009 | rc = digital_tg_send_cmd(ddev, skb, 300, digital_tg_recv_sel_req, |
| 1010 | NULL); |
| 1011 | if (rc) |
| 1012 | kfree_skb(skb); |
| 1013 | |
| 1014 | return rc; |
| 1015 | } |
| 1016 | |
| 1017 | static void digital_tg_recv_sdd_req(struct nfc_digital_dev *ddev, void *arg, |
| 1018 | struct sk_buff *resp) |
| 1019 | { |
| 1020 | u8 *sdd_req; |
| 1021 | int rc; |
| 1022 | |
| 1023 | if (IS_ERR(resp)) { |
| 1024 | rc = PTR_ERR(resp); |
| 1025 | resp = NULL; |
| 1026 | goto exit; |
| 1027 | } |
| 1028 | |
| 1029 | sdd_req = resp->data; |
| 1030 | |
| 1031 | if (resp->len < 2 || sdd_req[0] != DIGITAL_CMD_SEL_REQ_CL1 || |
| 1032 | sdd_req[1] != DIGITAL_SDD_REQ_SEL_PAR) { |
| 1033 | rc = -EINVAL; |
| 1034 | goto exit; |
| 1035 | } |
| 1036 | |
| 1037 | rc = digital_tg_send_sdd_res(ddev); |
| 1038 | |
| 1039 | exit: |
| 1040 | if (rc) |
| 1041 | digital_poll_next_tech(ddev); |
| 1042 | |
| 1043 | dev_kfree_skb(resp); |
| 1044 | } |
| 1045 | |
| 1046 | static int digital_tg_send_sens_res(struct nfc_digital_dev *ddev) |
| 1047 | { |
| 1048 | struct sk_buff *skb; |
| 1049 | u8 *sens_res; |
| 1050 | int rc; |
| 1051 | |
| 1052 | skb = digital_skb_alloc(ddev, 2); |
| 1053 | if (!skb) |
| 1054 | return -ENOMEM; |
| 1055 | |
| 1056 | sens_res = skb_put(skb, 2); |
| 1057 | |
| 1058 | sens_res[0] = (DIGITAL_SENS_RES_NFC_DEP >> 8) & 0xFF; |
| 1059 | sens_res[1] = DIGITAL_SENS_RES_NFC_DEP & 0xFF; |
| 1060 | |
Mark A. Greer | 55537c7e | 2014-07-02 10:16:15 -0700 | [diff] [blame] | 1061 | rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, |
| 1062 | NFC_DIGITAL_FRAMING_NFCA_STANDARD); |
| 1063 | if (rc) { |
| 1064 | kfree_skb(skb); |
| 1065 | return rc; |
| 1066 | } |
| 1067 | |
Thierry Escande | 1c7a4c2 | 2013-09-19 17:55:30 +0200 | [diff] [blame] | 1068 | rc = digital_tg_send_cmd(ddev, skb, 300, digital_tg_recv_sdd_req, |
| 1069 | NULL); |
| 1070 | if (rc) |
| 1071 | kfree_skb(skb); |
| 1072 | |
| 1073 | return rc; |
| 1074 | } |
| 1075 | |
| 1076 | void digital_tg_recv_sens_req(struct nfc_digital_dev *ddev, void *arg, |
| 1077 | struct sk_buff *resp) |
| 1078 | { |
| 1079 | u8 sens_req; |
| 1080 | int rc; |
| 1081 | |
| 1082 | if (IS_ERR(resp)) { |
| 1083 | rc = PTR_ERR(resp); |
| 1084 | resp = NULL; |
| 1085 | goto exit; |
| 1086 | } |
| 1087 | |
| 1088 | sens_req = resp->data[0]; |
| 1089 | |
| 1090 | if (!resp->len || (sens_req != DIGITAL_CMD_SENS_REQ && |
| 1091 | sens_req != DIGITAL_CMD_ALL_REQ)) { |
| 1092 | rc = -EINVAL; |
| 1093 | goto exit; |
| 1094 | } |
| 1095 | |
| 1096 | rc = digital_tg_send_sens_res(ddev); |
| 1097 | |
| 1098 | exit: |
| 1099 | if (rc) |
| 1100 | digital_poll_next_tech(ddev); |
| 1101 | |
| 1102 | dev_kfree_skb(resp); |
| 1103 | } |
| 1104 | |
Mark A. Greer | 4b8b626 | 2014-04-23 11:00:56 -0700 | [diff] [blame] | 1105 | static void digital_tg_recv_atr_or_sensf_req(struct nfc_digital_dev *ddev, |
| 1106 | void *arg, struct sk_buff *resp) |
| 1107 | { |
| 1108 | if (!IS_ERR(resp) && (resp->len >= 2) && |
| 1109 | (resp->data[1] == DIGITAL_CMD_SENSF_REQ)) |
| 1110 | digital_tg_recv_sensf_req(ddev, arg, resp); |
| 1111 | else |
| 1112 | digital_tg_recv_atr_req(ddev, arg, resp); |
| 1113 | |
| 1114 | return; |
| 1115 | } |
| 1116 | |
Fengguang Wu | 180106b | 2013-09-20 17:08:08 +0200 | [diff] [blame] | 1117 | static int digital_tg_send_sensf_res(struct nfc_digital_dev *ddev, |
Thierry Escande | 1c7a4c2 | 2013-09-19 17:55:30 +0200 | [diff] [blame] | 1118 | struct digital_sensf_req *sensf_req) |
| 1119 | { |
| 1120 | struct sk_buff *skb; |
| 1121 | u8 size; |
| 1122 | int rc; |
| 1123 | struct digital_sensf_res *sensf_res; |
| 1124 | |
| 1125 | size = sizeof(struct digital_sensf_res); |
| 1126 | |
Mark A. Greer | 96e829b4 | 2014-04-23 11:00:55 -0700 | [diff] [blame] | 1127 | if (sensf_req->rc == DIGITAL_SENSF_REQ_RC_NONE) |
Thierry Escande | 1c7a4c2 | 2013-09-19 17:55:30 +0200 | [diff] [blame] | 1128 | size -= sizeof(sensf_res->rd); |
| 1129 | |
| 1130 | skb = digital_skb_alloc(ddev, size); |
| 1131 | if (!skb) |
| 1132 | return -ENOMEM; |
| 1133 | |
| 1134 | skb_put(skb, size); |
| 1135 | |
| 1136 | sensf_res = (struct digital_sensf_res *)skb->data; |
| 1137 | |
| 1138 | memset(sensf_res, 0, size); |
| 1139 | |
| 1140 | sensf_res->cmd = DIGITAL_CMD_SENSF_RES; |
| 1141 | sensf_res->nfcid2[0] = DIGITAL_SENSF_NFCID2_NFC_DEP_B1; |
| 1142 | sensf_res->nfcid2[1] = DIGITAL_SENSF_NFCID2_NFC_DEP_B2; |
| 1143 | get_random_bytes(&sensf_res->nfcid2[2], 6); |
| 1144 | |
| 1145 | switch (sensf_req->rc) { |
| 1146 | case DIGITAL_SENSF_REQ_RC_SC: |
| 1147 | sensf_res->rd[0] = sensf_req->sc1; |
| 1148 | sensf_res->rd[1] = sensf_req->sc2; |
| 1149 | break; |
| 1150 | case DIGITAL_SENSF_REQ_RC_AP: |
| 1151 | sensf_res->rd[0] = DIGITAL_SENSF_RES_RD_AP_B1; |
| 1152 | sensf_res->rd[1] = DIGITAL_SENSF_RES_RD_AP_B2; |
| 1153 | break; |
| 1154 | } |
| 1155 | |
Johannes Berg | d58ff35 | 2017-06-16 14:29:23 +0200 | [diff] [blame] | 1156 | *(u8 *)skb_push(skb, sizeof(u8)) = size + 1; |
Thierry Escande | 1c7a4c2 | 2013-09-19 17:55:30 +0200 | [diff] [blame] | 1157 | |
| 1158 | if (!DIGITAL_DRV_CAPS_TG_CRC(ddev)) |
| 1159 | digital_skb_add_crc_f(skb); |
| 1160 | |
| 1161 | rc = digital_tg_send_cmd(ddev, skb, 300, |
Mark A. Greer | 4b8b626 | 2014-04-23 11:00:56 -0700 | [diff] [blame] | 1162 | digital_tg_recv_atr_or_sensf_req, NULL); |
Thierry Escande | 1c7a4c2 | 2013-09-19 17:55:30 +0200 | [diff] [blame] | 1163 | if (rc) |
| 1164 | kfree_skb(skb); |
| 1165 | |
| 1166 | return rc; |
| 1167 | } |
| 1168 | |
| 1169 | void digital_tg_recv_sensf_req(struct nfc_digital_dev *ddev, void *arg, |
| 1170 | struct sk_buff *resp) |
| 1171 | { |
| 1172 | struct digital_sensf_req *sensf_req; |
| 1173 | int rc; |
| 1174 | |
| 1175 | if (IS_ERR(resp)) { |
| 1176 | rc = PTR_ERR(resp); |
| 1177 | resp = NULL; |
| 1178 | goto exit; |
| 1179 | } |
| 1180 | |
| 1181 | if (!DIGITAL_DRV_CAPS_TG_CRC(ddev)) { |
| 1182 | rc = digital_skb_check_crc_f(resp); |
| 1183 | if (rc) { |
| 1184 | PROTOCOL_ERR("6.4.1.8"); |
| 1185 | goto exit; |
| 1186 | } |
| 1187 | } |
| 1188 | |
| 1189 | if (resp->len != sizeof(struct digital_sensf_req) + 1) { |
| 1190 | rc = -EINVAL; |
| 1191 | goto exit; |
| 1192 | } |
| 1193 | |
| 1194 | skb_pull(resp, 1); |
| 1195 | sensf_req = (struct digital_sensf_req *)resp->data; |
| 1196 | |
| 1197 | if (sensf_req->cmd != DIGITAL_CMD_SENSF_REQ) { |
| 1198 | rc = -EINVAL; |
| 1199 | goto exit; |
| 1200 | } |
| 1201 | |
| 1202 | rc = digital_tg_send_sensf_res(ddev, sensf_req); |
| 1203 | |
| 1204 | exit: |
| 1205 | if (rc) |
| 1206 | digital_poll_next_tech(ddev); |
| 1207 | |
| 1208 | dev_kfree_skb(resp); |
| 1209 | } |
| 1210 | |
Mark A. Greer | bf30a67 | 2014-07-21 21:24:39 -0700 | [diff] [blame] | 1211 | static int digital_tg_config_nfca(struct nfc_digital_dev *ddev) |
| 1212 | { |
| 1213 | int rc; |
| 1214 | |
| 1215 | rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, |
| 1216 | NFC_DIGITAL_RF_TECH_106A); |
| 1217 | if (rc) |
| 1218 | return rc; |
| 1219 | |
| 1220 | return digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, |
| 1221 | NFC_DIGITAL_FRAMING_NFCA_NFC_DEP); |
| 1222 | } |
| 1223 | |
Thierry Escande | 1c7a4c2 | 2013-09-19 17:55:30 +0200 | [diff] [blame] | 1224 | int digital_tg_listen_nfca(struct nfc_digital_dev *ddev, u8 rf_tech) |
| 1225 | { |
| 1226 | int rc; |
| 1227 | |
Mark A. Greer | bf30a67 | 2014-07-21 21:24:39 -0700 | [diff] [blame] | 1228 | rc = digital_tg_config_nfca(ddev); |
| 1229 | if (rc) |
| 1230 | return rc; |
| 1231 | |
| 1232 | return digital_tg_listen(ddev, 300, digital_tg_recv_sens_req, NULL); |
| 1233 | } |
| 1234 | |
| 1235 | static int digital_tg_config_nfcf(struct nfc_digital_dev *ddev, u8 rf_tech) |
| 1236 | { |
| 1237 | int rc; |
| 1238 | |
Thierry Escande | 1c7a4c2 | 2013-09-19 17:55:30 +0200 | [diff] [blame] | 1239 | rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, rf_tech); |
| 1240 | if (rc) |
| 1241 | return rc; |
| 1242 | |
Mark A. Greer | bf30a67 | 2014-07-21 21:24:39 -0700 | [diff] [blame] | 1243 | return digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, |
| 1244 | NFC_DIGITAL_FRAMING_NFCF_NFC_DEP); |
Thierry Escande | 1c7a4c2 | 2013-09-19 17:55:30 +0200 | [diff] [blame] | 1245 | } |
| 1246 | |
| 1247 | int digital_tg_listen_nfcf(struct nfc_digital_dev *ddev, u8 rf_tech) |
| 1248 | { |
| 1249 | int rc; |
Thierry Escande | 1c7a4c2 | 2013-09-19 17:55:30 +0200 | [diff] [blame] | 1250 | |
Mark A. Greer | bf30a67 | 2014-07-21 21:24:39 -0700 | [diff] [blame] | 1251 | rc = digital_tg_config_nfcf(ddev, rf_tech); |
Thierry Escande | 1c7a4c2 | 2013-09-19 17:55:30 +0200 | [diff] [blame] | 1252 | if (rc) |
| 1253 | return rc; |
| 1254 | |
Thierry Escande | b776934 | 2016-06-16 20:24:41 +0200 | [diff] [blame] | 1255 | return digital_tg_listen(ddev, 300, digital_tg_recv_sensf_req, NULL); |
Thierry Escande | 1c7a4c2 | 2013-09-19 17:55:30 +0200 | [diff] [blame] | 1256 | } |
Mark A. Greer | bf30a67 | 2014-07-21 21:24:39 -0700 | [diff] [blame] | 1257 | |
| 1258 | void digital_tg_recv_md_req(struct nfc_digital_dev *ddev, void *arg, |
| 1259 | struct sk_buff *resp) |
| 1260 | { |
| 1261 | u8 rf_tech; |
| 1262 | int rc; |
| 1263 | |
| 1264 | if (IS_ERR(resp)) { |
| 1265 | resp = NULL; |
| 1266 | goto exit_free_skb; |
| 1267 | } |
| 1268 | |
| 1269 | rc = ddev->ops->tg_get_rf_tech(ddev, &rf_tech); |
| 1270 | if (rc) |
| 1271 | goto exit_free_skb; |
| 1272 | |
| 1273 | switch (rf_tech) { |
| 1274 | case NFC_DIGITAL_RF_TECH_106A: |
| 1275 | rc = digital_tg_config_nfca(ddev); |
| 1276 | if (rc) |
| 1277 | goto exit_free_skb; |
| 1278 | digital_tg_recv_sens_req(ddev, arg, resp); |
| 1279 | break; |
| 1280 | case NFC_DIGITAL_RF_TECH_212F: |
| 1281 | case NFC_DIGITAL_RF_TECH_424F: |
| 1282 | rc = digital_tg_config_nfcf(ddev, rf_tech); |
| 1283 | if (rc) |
| 1284 | goto exit_free_skb; |
| 1285 | digital_tg_recv_sensf_req(ddev, arg, resp); |
| 1286 | break; |
| 1287 | default: |
| 1288 | goto exit_free_skb; |
| 1289 | } |
| 1290 | |
| 1291 | return; |
| 1292 | |
| 1293 | exit_free_skb: |
| 1294 | digital_poll_next_tech(ddev); |
| 1295 | dev_kfree_skb(resp); |
| 1296 | } |