git.rot13.org Git - librfid/blob - src/rfid_reader_openpcd.c

   1 /* OpenPCD specific RC632 transport layer
   2  *
   3  * (C) 2006 by Harald Welte <laforge@gnumonks.org>
   4  *
   5  * The OpenPCD is an Atmel AT91SAM7Sxx based USB RFID reader.
   6  * It's CL RC632 is connected via SPI.  OpenPCD has multiple firmware
   7  * images.  This driver is for the "main_dumbreader" firmware.
   8  *
   9  * TODO:
  10  * - put hdl from static variable into asic transport or reader handle
  11  */
  12
  13 /*
  14  *  This program is free software; you can redistribute it and/or modify
  15  *  it under the terms of the GNU General Public License version 2
  16  *  as published by the Free Software Foundation
  17  *
  18  *  This program is distributed in the hope that it will be useful,
  19  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  *  GNU General Public License for more details.
  22  *
  23  *  You should have received a copy of the GNU General Public License
  24  *  along with this program; if not, write to the Free Software
  25  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  26  */
  27
  28 //#define DEBUG
  29
  30 #include <stdlib.h>
  31 #include <unistd.h>
  32 #include <string.h>
  33 #include <errno.h>
  34
  35
  36 #include <librfid/rfid.h>
  37 #include <librfid/rfid_reader.h>
  38 #include <librfid/rfid_asic.h>
  39 #include <librfid/rfid_asic_rc632.h>
  40 #include <librfid/rfid_reader_openpcd.h>
  41 #include <librfid/rfid_layer2.h>
  42 #include <librfid/rfid_protocol.h>
  43
  44 /* FIXME */
  45 #include "rc632.h"
  46
  47 #define SENDBUF_LEN     (256+4+10) /* 256bytes max FSD/FSC, plus 4 bytes header,
  48                                     plus 10 bytes reserve */
  49 #define RECVBUF_LEN     SENDBUF_LEN
  50
  51 static char snd_buf[SENDBUF_LEN];
  52 static char rcv_buf[RECVBUF_LEN];
  53 static struct openpcd_hdr *snd_hdr;
  54 static struct openpcd_hdr *rcv_hdr;
  55
  56
  57 #ifndef LIBRFID_FIRMWARE
  58
  59 #ifdef  __MINGW32__
  60 #include "libusb_dyn.h"
  61 #else /*__MINGW32__*/
  62 #include <usb.h>
  63 #endif/*__MINGW32__*/
  64
  65 static struct usb_device *dev;
  66 static struct usb_dev_handle *hdl;
  67
  68 static int openpcd_send_command(u_int8_t cmd, u_int8_t reg, u_int8_t val,
  69                                 u_int16_t len, const unsigned char *data)
  70 {
  71         int ret;
  72         u_int16_t cur;
  73
  74         snd_hdr->cmd = cmd;
  75         snd_hdr->reg = reg;
  76         snd_hdr->val = val;
  77         snd_hdr->flags = OPENPCD_FLAG_RESPOND;
  78         if (data && len)
  79                 memcpy(snd_hdr->data, data, len);
  80
  81         cur = sizeof(*snd_hdr) + len;
  82
  83         return usb_bulk_write(hdl, OPENPCD_OUT_EP, (char *)snd_hdr, cur, 0);
  84 }
  85
  86 static int openpcd_recv_reply(void)
  87 {
  88         int ret;
  89
  90         ret = usb_bulk_read(hdl, OPENPCD_IN_EP, rcv_buf, sizeof(rcv_buf), 1000);
  91
  92         return ret;
  93 }
  94
  95 static int openpcd_xcv(u_int8_t cmd, u_int8_t reg, u_int8_t val,
  96                         u_int16_t len, const unsigned char *data)
  97 {
  98         int ret;
  99
 100         ret = openpcd_send_command(cmd, reg, val, len, data);
 101         if (ret < 0)
 102                 return ret;
 103         if (ret < sizeof(struct openpcd_hdr))
 104                 return -EINVAL;
 105
 106         return openpcd_recv_reply();
 107 }
 108
 109 struct usb_id {
 110         u_int16_t vid;
 111         u_int16_t pid;
 112 };
 113
 114 static const struct usb_id opcd_usb_ids[] = {
 115         { .vid = 0x2342, .pid = 0x0001 },       /* prototypes */
 116         { .vid = 0x16c0, .pid = 0x076b },       /* first official device id */
 117 };
 118
 119 static struct usb_device *find_opcd_device(void)
 120 {
 121         struct usb_bus *bus;
 122
 123         for (bus = usb_busses; bus; bus = bus->next) {
 124                 struct usb_device *dev;
 125                 for (dev = bus->devices; dev; dev = dev->next) {
 126                         int i;
 127                         for (i = 0; i < ARRAY_SIZE(opcd_usb_ids); i++) {
 128                                 const struct usb_id *id = &opcd_usb_ids[i];
 129                                 if (dev->descriptor.idVendor == id->vid &&
 130                                     dev->descriptor.idProduct == id->pid)
 131                                         return dev;
 132                         }
 133                 }
 134         }
 135         return NULL;
 136 }
 137
 138 /* RC632 access primitives for librfid inside reader firmware */
 139
 140 static int openpcd_reg_write(struct rfid_asic_transport_handle *rath,
 141                              unsigned char reg, unsigned char value)
 142 {
 143         int ret;
 144
 145         DEBUGP("reg=0x%02x, val=%02x: ", reg, value);
 146
 147         ret = openpcd_xcv(OPENPCD_CMD_WRITE_REG, reg, value, 0, NULL);
 148         if (ret < 0)
 149                 DEBUGPC("ERROR sending command\n");
 150         else
 151                 DEBUGPC("OK\n");
 152
 153         return ret;
 154 }
 155
 156 static int openpcd_reg_read(struct rfid_asic_transport_handle *rath,
 157                             unsigned char reg,
 158                             unsigned char *value)
 159 {
 160         int ret;
 161
 162         DEBUGP("reg=0x%02x, ", reg);
 163
 164         ret = openpcd_xcv(OPENPCD_CMD_READ_REG, reg, 0, 0, NULL);
 165         if (ret < 0) {
 166                 DEBUGPC("ERROR sending command\n");
 167                 return ret;
 168         }
 169
 170         if (ret < sizeof(struct openpcd_hdr)) {
 171                 DEBUGPC("ERROR: short packet\n");
 172                 return ret;
 173         }
 174
 175         *value = rcv_hdr->val;
 176         DEBUGPC("val=%02x: OK\n", *value);
 177
 178         return ret;
 179 }
 180
 181 static int openpcd_fifo_read(struct rfid_asic_transport_handle *rath,
 182                              unsigned char num_bytes,
 183                              unsigned char *buf)
 184 {
 185         int ret;
 186
 187         DEBUGP(" ");
 188
 189         ret = openpcd_xcv(OPENPCD_CMD_READ_FIFO, 0x00, num_bytes, 0, NULL);
 190         if (ret < 0) {
 191                 DEBUGPC("ERROR sending command\n");
 192                 return ret;
 193         }
 194         DEBUGPC("ret = %d\n", ret);
 195
 196         memcpy(buf, rcv_hdr->data, ret - sizeof(struct openpcd_hdr));
 197         DEBUGPC("len=%d val=%s: OK\n", ret - sizeof(struct openpcd_hdr),
 198                 rfid_hexdump(rcv_hdr->data, ret - sizeof(struct openpcd_hdr)));
 199
 200         return ret;
 201 }
 202
 203 static int openpcd_fifo_write(struct rfid_asic_transport_handle *rath,
 204                              unsigned char len,
 205                              const unsigned char *bytes,
 206                              unsigned char flags)
 207 {
 208         int ret;
 209
 210         DEBUGP("len=%u, data=%s\n", len, rfid_hexdump(bytes, len));
 211         ret = openpcd_xcv(OPENPCD_CMD_WRITE_FIFO, 0, 0, len, bytes);
 212
 213         return ret;
 214 }
 215
 216 const struct rfid_asic_transport openpcd_rat = {
 217         .name = "OpenPCD Dumb USB Protocol",
 218         .priv.rc632 = {
 219                 .fn = {
 220                         .reg_write      = &openpcd_reg_write,
 221                         .reg_read       = &openpcd_reg_read,
 222                         .fifo_write     = &openpcd_fifo_write,
 223                         .fifo_read      = &openpcd_fifo_read,
 224                 },
 225         },
 226 };
 227
 228 #else
 229 /* RC632 access primitives for librfid inside reader firmware */
 230
 231 static int openpcd_reg_write(struct rfid_asic_transport_handle *rath,
 232                              unsigned char reg, unsigned char value)
 233 {
 234         return opcd_rc632_reg_write(rath, reg, value);
 235 }
 236
 237 static int openpcd_reg_read(struct rfid_asic_transport_handle *rath,
 238                             unsigned char reg,
 239                             unsigned char *value)
 240 {
 241         return opcd_rc632_reg_read(rath, reg, value);
 242 }
 243
 244
 245 static int openpcd_fifo_read(struct rfid_asic_transport_handle *rath,
 246                              unsigned char num_bytes,
 247                              unsigned char *buf)
 248 {
 249         return opcd_rc632_fifo_read(rath, num_bytes, buf);
 250 }
 251
 252 static int openpcd_fifo_write(struct rfid_asic_transport_handle *rath,
 253                              unsigned char len,
 254                              const unsigned char *bytes,
 255                              unsigned char flags)
 256 {
 257         return opcd_rc632_fifo_write(rath, len, bytes, flags);
 258 }
 259
 260 const struct rfid_asic_transport openpcd_rat = {
 261         .name = "OpenPCD Firmware RC632 Access",
 262         .priv.rc632 = {
 263                 .fn = {
 264                         .reg_write      = &openpcd_reg_write,
 265                         .reg_read       = &openpcd_reg_read,
 266                         .fifo_write     = &openpcd_fifo_write,
 267                         .fifo_read      = &openpcd_fifo_read,
 268                 },
 269         },
 270 };
 271
 272 #endif /* LIBRFID_FIRMWARE */
 273
 274 static int openpcd_transceive(struct rfid_reader_handle *rh,
 275                              enum rfid_frametype frametype,
 276                              const unsigned char *tx_data, unsigned int tx_len,
 277                              unsigned char *rx_data, unsigned int *rx_len,
 278                              u_int64_t timeout, unsigned int flags)
 279 {
 280         return rh->ah->asic->priv.rc632.fn.transceive(rh->ah, frametype,
 281                                                       tx_data, tx_len,
 282                                                       rx_data, rx_len,
 283                                                       timeout, flags);
 284 }
 285
 286 static int openpcd_transceive_sf(struct rfid_reader_handle *rh,
 287                                unsigned char cmd, struct iso14443a_atqa *atqa)
 288 {
 289         return rh->ah->asic->priv.rc632.fn.iso14443a.transceive_sf(rh->ah,
 290                                                                    cmd,
 291                                                                    atqa);
 292 }
 293
 294 static int
 295 openpcd_transceive_acf(struct rfid_reader_handle *rh,
 296                       struct iso14443a_anticol_cmd *cmd,
 297                       unsigned int *bit_of_col)
 298 {
 299         return rh->ah->asic->priv.rc632.fn.iso14443a.transceive_acf(rh->ah,
 300                                                          cmd, bit_of_col);
 301 }
 302
 303 static int
 304 openpcd_14443a_init(struct rfid_reader_handle *rh)
 305 {
 306         return rh->ah->asic->priv.rc632.fn.iso14443a.init(rh->ah);
 307 }
 308
 309 static int
 310 openpcd_14443a_set_speed(struct rfid_reader_handle *rh,
 311                         unsigned int tx,
 312                         unsigned int speed)
 313 {
 314         u_int8_t rate;
 315
 316         DEBUGP("setting rate: ");
 317         switch (speed) {
 318         case RFID_14443A_SPEED_106K:
 319                 rate = 0x00;
 320                 DEBUGPC("106K\n");
 321                 break;
 322         case RFID_14443A_SPEED_212K:
 323                 rate = 0x01;
 324                 DEBUGPC("212K\n");
 325                 break;
 326         case RFID_14443A_SPEED_424K:
 327                 rate = 0x02;
 328                 DEBUGPC("424K\n");
 329                 break;
 330         case RFID_14443A_SPEED_848K:
 331                 rate = 0x03;
 332                 DEBUGPC("848K\n");
 333                 break;
 334         default:
 335                 return -EINVAL;
 336                 break;
 337         }
 338         return rh->ah->asic->priv.rc632.fn.iso14443a.set_speed(rh->ah,
 339                                                                 tx, rate);
 340 }
 341
 342 static int
 343 openpcd_14443b_init(struct rfid_reader_handle *rh)
 344 {
 345         return rh->ah->asic->priv.rc632.fn.iso14443b.init(rh->ah);
 346 }
 347
 348 static int
 349 openpcd_15693_init(struct rfid_reader_handle *rh)
 350 {
 351         return rh->ah->asic->priv.rc632.fn.iso15693.init(rh->ah);
 352 }
 353
 354 static int
 355 openpcd_mifare_setkey(struct rfid_reader_handle *rh, const u_int8_t *key)
 356 {
 357         return rh->ah->asic->priv.rc632.fn.mifare_classic.setkey(rh->ah, key);
 358 }
 359
 360 static int
 361 openpcd_mifare_auth(struct rfid_reader_handle *rh, u_int8_t cmd,
 362                    u_int32_t serno, u_int8_t block)
 363 {
 364         return rh->ah->asic->priv.rc632.fn.mifare_classic.auth(rh->ah,
 365                                                         cmd, serno, block);
 366 }
 367
 368 static struct rfid_reader_handle *
 369 openpcd_open(void *data)
 370 {
 371         struct rfid_reader_handle *rh;
 372         struct rfid_asic_transport_handle *rath;
 373
 374         snd_hdr = (struct openpcd_hdr *)snd_buf;
 375         rcv_hdr = (struct openpcd_hdr *)rcv_buf;
 376
 377 #ifndef LIBRFID_FIRMWARE
 378         usb_init();
 379         if (usb_find_busses() < 0)
 380                 return NULL;
 381         if (usb_find_devices() < 0)
 382                 return NULL;
 383
 384         dev = find_opcd_device();
 385         if (!dev) {
 386                 DEBUGP("No matching USB device found\n");
 387                 return NULL;
 388         }
 389
 390         hdl = usb_open(dev);
 391         if (!hdl) {
 392                 DEBUGP("Can't open USB device\n");
 393                 return NULL;
 394         }
 395
 396         if (usb_claim_interface(hdl, 0) < 0) {
 397                 DEBUGP("Can't claim interface\n");
 398                 usb_close(hdl);
 399                 return NULL;
 400         }
 401 #endif
 402
 403         rh = malloc_reader_handle(sizeof(*rh));
 404         if (!rh)
 405                 return NULL;
 406         memset(rh, 0, sizeof(*rh));
 407
 408         rath = malloc_rat_handle(sizeof(*rath));
 409         if (!rath)
 410                 goto out_rh;
 411         memset(rath, 0, sizeof(*rath));
 412
 413         rath->rat = &openpcd_rat;
 414         rh->reader = &rfid_reader_openpcd;
 415
 416         rh->ah = rc632_open(rath);
 417         if (!rh->ah)
 418                 goto out_rath;
 419
 420         DEBUGP("returning %p\n", rh);
 421         return rh;
 422
 423 out_rath:
 424         free_rat_handle(rath);
 425 out_rh:
 426         free_reader_handle(rh);
 427
 428         return NULL;
 429 }
 430
 431 static void
 432 openpcd_close(struct rfid_reader_handle *rh)
 433 {
 434         struct rfid_asic_transport_handle *rath = rh->ah->rath;
 435
 436         rc632_close(rh->ah);
 437         free_rat_handle(rath);
 438         free_reader_handle(rh);
 439
 440 #ifndef LIBRFID_FIRMWARE
 441         usb_close(hdl);
 442 #endif
 443 }
 444
 445 const struct rfid_reader rfid_reader_openpcd = {
 446         .name   = "OpenPCD RFID Reader",
 447         .id = RFID_READER_OPENPCD,
 448         .open = &openpcd_open,
 449         .close = &openpcd_close,
 450         .transceive = &openpcd_transceive,
 451         .l2_supported = (1 << RFID_LAYER2_ISO14443A) |
 452                         (1 << RFID_LAYER2_ISO14443B) |
 453                         (1 << RFID_LAYER2_ISO15693),
 454         .proto_supported = (1 << RFID_PROTOCOL_TCL) |
 455                         (1 << RFID_PROTOCOL_MIFARE_UL) |
 456                         (1 << RFID_PROTOCOL_MIFARE_CLASSIC),
 457         .iso14443a = {
 458                 .init = &openpcd_14443a_init,
 459                 .transceive_sf = &openpcd_transceive_sf,
 460                 .transceive_acf = &openpcd_transceive_acf,
 461                 .speed = RFID_14443A_SPEED_106K | RFID_14443A_SPEED_212K |
 462                          RFID_14443A_SPEED_424K, //| RFID_14443A_SPEED_848K,
 463                 .set_speed = &openpcd_14443a_set_speed,
 464         },
 465         .iso14443b = {
 466                 .init = &openpcd_14443b_init,
 467         },
 468         .iso15693 = {
 469                 .init = &openpcd_15693_init,
 470         },
 471         .mifare_classic = {
 472                 .setkey = &openpcd_mifare_setkey,
 473                 .auth = &openpcd_mifare_auth,
 474         },
 475 };