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 #include <usb.h>
  36
  37 #include <librfid/rfid.h>
  38 #include <librfid/rfid_reader.h>
  39 #include <librfid/rfid_asic.h>
  40 #include <librfid/rfid_asic_rc632.h>
  41 #include <librfid/rfid_reader_openpcd.h>
  42 #include <librfid/rfid_layer2.h>
  43 #include <librfid/rfid_protocol.h>
  44
  45 /* FIXME */
  46 #include "rc632.h"
  47
  48
  49 #define SENDBUF_LEN     (256+4+10) /* 256bytes max FSD/FSC, plus 4 bytes header,
  50                                     plus 10 bytes reserve */
  51 #define RECVBUF_LEN     SENDBUF_LEN
  52
  53 static char snd_buf[SENDBUF_LEN];
  54 static char rcv_buf[RECVBUF_LEN];
  55 static struct openpcd_hdr *snd_hdr;
  56 static struct openpcd_hdr *rcv_hdr;
  57
  58
  59 static struct usb_device *dev;
  60 static struct usb_dev_handle *hdl;
  61
  62 static int openpcd_send_command(u_int8_t cmd, u_int8_t reg, u_int8_t val,
  63                                 u_int16_t len, const unsigned char *data)
  64 {
  65         int ret;
  66         u_int16_t cur;
  67
  68         snd_hdr->cmd = cmd;
  69         snd_hdr->reg = reg;
  70         snd_hdr->val = val;
  71         snd_hdr->flags = OPENPCD_FLAG_RESPOND;
  72         if (data && len)
  73                 memcpy(snd_hdr->data, data, len);
  74
  75         cur = sizeof(*snd_hdr) + len;
  76
  77         return usb_bulk_write(hdl, OPENPCD_OUT_EP, (char *)snd_hdr, cur, 0);
  78 }
  79
  80 static int openpcd_recv_reply(void)
  81 {
  82         int ret;
  83
  84         ret = usb_bulk_read(hdl, OPENPCD_IN_EP, rcv_buf, sizeof(rcv_buf), 1000);
  85
  86         return ret;
  87 }
  88
  89 static int openpcd_xcv(u_int8_t cmd, u_int8_t reg, u_int8_t val,
  90                         u_int16_t len, const unsigned char *data)
  91 {
  92         int ret;
  93
  94         ret = openpcd_send_command(cmd, reg, val, len, data);
  95         if (ret < 0)
  96                 return ret;
  97         if (ret < sizeof(sizeof(struct openpcd_hdr)))
  98                 return -EINVAL;
  99
 100         return openpcd_recv_reply();
 101 }
 102
 103 struct usb_id {
 104         u_int16_t vid;
 105         u_int16_t pid;
 106 };
 107
 108 static const struct usb_id opcd_usb_ids[] = {
 109         { .vid = 0x2342, .pid = 0x0001 },       /* prototypes */
 110         { .vid = 0x16c0, .pid = 0x076b },       /* first official device id */
 111 };
 112
 113 static struct usb_device *find_opcd_device(void)
 114 {
 115         struct usb_bus *bus;
 116
 117         for (bus = usb_busses; bus; bus = bus->next) {
 118                 struct usb_device *dev;
 119                 for (dev = bus->devices; dev; dev = dev->next) {
 120                         int i;
 121                         printf("usb: %4x:%4x\n", dev->descriptor.idVendor,
 122                                 dev->descriptor.idProduct);
 123                         for (i = 0; i < ARRAY_SIZE(opcd_usb_ids); i++) {
 124                                 const struct usb_id *id = &opcd_usb_ids[i];
 125                                 printf("%x:%x\n", id->vid, id->pid);
 126                                 if (dev->descriptor.idVendor == id->vid &&
 127                                     dev->descriptor.idProduct == id->pid)
 128                                         return dev;
 129                         }
 130                 }
 131         }
 132         return NULL;
 133 }
 134
 135 static int openpcd_reg_write(struct rfid_asic_transport_handle *rath,
 136                              unsigned char reg, unsigned char value)
 137 {
 138         int ret;
 139
 140         DEBUGP("reg=0x%02x, val=%02x: ", reg, value);
 141
 142         ret = openpcd_xcv(OPENPCD_CMD_WRITE_REG, reg, value, 0, NULL);
 143         if (ret < 0)
 144                 DEBUGPC("ERROR sending command\n");
 145         else
 146                 DEBUGPC("OK\n");
 147
 148         return ret;
 149 }
 150
 151 static int openpcd_reg_read(struct rfid_asic_transport_handle *rath,
 152                             unsigned char reg,
 153                             unsigned char *value)
 154 {
 155         int ret;
 156
 157         DEBUGP("reg=0x%02x, ", reg);
 158
 159         ret = openpcd_xcv(OPENPCD_CMD_READ_REG, reg, 0, 0, NULL);
 160         if (ret < 0) {
 161                 DEBUGPC("ERROR sending command\n");
 162                 return ret;
 163         }
 164
 165         if (ret < sizeof(struct openpcd_hdr)) {
 166                 DEBUGPC("ERROR: short packet\n");
 167                 return ret;
 168         }
 169
 170         *value = rcv_hdr->val;
 171         DEBUGPC("val=%02x: OK\n", *value);
 172
 173         return ret;
 174 }
 175
 176 static int openpcd_fifo_read(struct rfid_asic_transport_handle *rath,
 177                              unsigned char num_bytes,
 178                              unsigned char *buf)
 179 {
 180         int ret;
 181
 182         DEBUGP(" ");
 183
 184         ret = openpcd_xcv(OPENPCD_CMD_READ_FIFO, 0x00, num_bytes, 0, NULL);
 185         if (ret < 0) {
 186                 DEBUGPC("ERROR sending command\n");
 187                 return ret;
 188         }
 189         DEBUGPC("ret = %d\n", ret);
 190
 191         memcpy(buf, rcv_hdr->data, ret - sizeof(struct openpcd_hdr));
 192         DEBUGPC("len=%d val=%s: OK\n", ret - sizeof(struct openpcd_hdr),
 193                 rfid_hexdump(rcv_hdr->data, ret - sizeof(struct openpcd_hdr)));
 194
 195         return ret;
 196 }
 197
 198 static int openpcd_fifo_write(struct rfid_asic_transport_handle *rath,
 199                              unsigned char len,
 200                              const unsigned char *bytes,
 201                              unsigned char flags)
 202 {
 203         int ret;
 204
 205         DEBUGP("len=%u, data=%s\n", len, rfid_hexdump(bytes, len));
 206         ret = openpcd_xcv(OPENPCD_CMD_WRITE_FIFO, 0, 0, len, bytes);
 207
 208         return ret;
 209 }
 210
 211 static int openpcd_transceive(struct rfid_reader_handle *rh,
 212                              enum rfid_frametype frametype,
 213                              const unsigned char *tx_data, unsigned int tx_len,
 214                              unsigned char *rx_data, unsigned int *rx_len,
 215                              u_int64_t timeout, unsigned int flags)
 216 {
 217         return rh->ah->asic->priv.rc632.fn.transceive(rh->ah, frametype,
 218                                                       tx_data, tx_len,
 219                                                       rx_data, rx_len,
 220                                                       timeout, flags);
 221 }
 222
 223 static int openpcd_transceive_sf(struct rfid_reader_handle *rh,
 224                                unsigned char cmd, struct iso14443a_atqa *atqa)
 225 {
 226         return rh->ah->asic->priv.rc632.fn.iso14443a.transceive_sf(rh->ah,
 227                                                                    cmd,
 228                                                                    atqa);
 229 }
 230
 231 static int
 232 openpcd_transceive_acf(struct rfid_reader_handle *rh,
 233                       struct iso14443a_anticol_cmd *cmd,
 234                       unsigned int *bit_of_col)
 235 {
 236         return rh->ah->asic->priv.rc632.fn.iso14443a.transceive_acf(rh->ah,
 237                                                          cmd, bit_of_col);
 238 }
 239
 240 static int
 241 openpcd_14443a_init(struct rfid_reader_handle *rh)
 242 {
 243         return rh->ah->asic->priv.rc632.fn.iso14443a.init(rh->ah);
 244 }
 245
 246 static int
 247 openpcd_14443a_set_speed(struct rfid_reader_handle *rh,
 248                         unsigned int tx,
 249                         unsigned int speed)
 250 {
 251         u_int8_t rate;
 252
 253         DEBUGP("setting rate: ");
 254         switch (speed) {
 255         case RFID_14443A_SPEED_106K:
 256                 rate = 0x00;
 257                 DEBUGPC("106K\n");
 258                 break;
 259         case RFID_14443A_SPEED_212K:
 260                 rate = 0x01;
 261                 DEBUGPC("212K\n");
 262                 break;
 263         case RFID_14443A_SPEED_424K:
 264                 rate = 0x02;
 265                 DEBUGPC("424K\n");
 266                 break;
 267         case RFID_14443A_SPEED_848K:
 268                 rate = 0x03;
 269                 DEBUGPC("848K\n");
 270                 break;
 271         default:
 272                 return -EINVAL;
 273                 break;
 274         }
 275         return rh->ah->asic->priv.rc632.fn.iso14443a.set_speed(rh->ah,
 276                                                                 tx, rate);
 277 }
 278
 279 static int
 280 openpcd_14443b_init(struct rfid_reader_handle *rh)
 281 {
 282         return rh->ah->asic->priv.rc632.fn.iso14443b.init(rh->ah);
 283 }
 284
 285 static int
 286 openpcd_15693_init(struct rfid_reader_handle *rh)
 287 {
 288         return rh->ah->asic->priv.rc632.fn.iso15693.init(rh->ah);
 289 }
 290
 291 static int
 292 openpcd_mifare_setkey(struct rfid_reader_handle *rh, const u_int8_t *key)
 293 {
 294         return rh->ah->asic->priv.rc632.fn.mifare_classic.setkey(rh->ah, key);
 295 }
 296
 297 static int
 298 openpcd_mifare_auth(struct rfid_reader_handle *rh, u_int8_t cmd,
 299                    u_int32_t serno, u_int8_t block)
 300 {
 301         return rh->ah->asic->priv.rc632.fn.mifare_classic.auth(rh->ah,
 302                                                         cmd, serno, block);
 303 }
 304
 305 struct rfid_asic_transport openpcd_ccid = {
 306         .name = "OpenPCD Dumb USB Protocol",
 307         .priv.rc632 = {
 308                 .fn = {
 309                         .reg_write      = &openpcd_reg_write,
 310                         .reg_read       = &openpcd_reg_read,
 311                         .fifo_write     = &openpcd_fifo_write,
 312                         .fifo_read      = &openpcd_fifo_read,
 313                 },
 314         },
 315 };
 316
 317 static struct rfid_reader_handle *
 318 openpcd_open(void *data)
 319 {
 320         struct rfid_reader_handle *rh;
 321         struct rfid_asic_transport_handle *rath;
 322
 323         snd_hdr = (struct openpcd_hdr *)snd_buf;
 324         rcv_hdr = (struct openpcd_hdr *)rcv_buf;
 325
 326         usb_init();
 327         if (usb_find_busses() < 0)
 328                 return NULL;
 329         if (usb_find_devices() < 0)
 330                 return NULL;
 331
 332         dev = find_opcd_device();
 333         if (!dev) {
 334                 DEBUGP("No matching USB device found\n");
 335                 return NULL;
 336         }
 337
 338         hdl = usb_open(dev);
 339         if (!hdl) {
 340                 DEBUGP("Can't open USB device\n");
 341                 return NULL;
 342         }
 343
 344         if (usb_claim_interface(hdl, 0) < 0) {
 345                 DEBUGP("Can't claim interface\n");
 346                 usb_close(hdl);
 347                 return NULL;
 348         }
 349
 350         rh = malloc(sizeof(*rh));
 351         if (!rh)
 352                 return NULL;
 353         memset(rh, 0, sizeof(*rh));
 354
 355         rath = malloc(sizeof(*rath));
 356         if (!rath)
 357                 goto out_rh;
 358         memset(rath, 0, sizeof(*rath));
 359
 360         rath->rat = &openpcd_ccid;
 361         rh->reader = &rfid_reader_openpcd;
 362
 363         rh->ah = rc632_open(rath);
 364         if (!rh->ah)
 365                 goto out_rath;
 366
 367         DEBUGP("returning %p\n", rh);
 368         return rh;
 369
 370 out_rath:
 371         free(rath);
 372 out_rh:
 373         free(rh);
 374
 375         return NULL;
 376 }
 377
 378 static void
 379 openpcd_close(struct rfid_reader_handle *rh)
 380 {
 381         struct rfid_asic_transport_handle *rath = rh->ah->rath;
 382
 383         rc632_close(rh->ah);
 384         free(rath);
 385         free(rh);
 386
 387         usb_close(hdl);
 388 }
 389
 390 struct rfid_reader rfid_reader_openpcd = {
 391         .name   = "OpenPCD RFID Reader",
 392         .id = RFID_READER_OPENPCD,
 393         .open = &openpcd_open,
 394         .close = &openpcd_close,
 395         .transceive = &openpcd_transceive,
 396         .l2_supported = (1 << RFID_LAYER2_ISO14443A) |
 397                         (1 << RFID_LAYER2_ISO14443B) |
 398                         (1 << RFID_LAYER2_ISO15693),
 399         .proto_supported = (1 << RFID_PROTOCOL_TCL) |
 400                         (1 << RFID_PROTOCOL_MIFARE_UL) |
 401                         (1 << RFID_PROTOCOL_MIFARE_CLASSIC),
 402         .iso14443a = {
 403                 .init = &openpcd_14443a_init,
 404                 .transceive_sf = &openpcd_transceive_sf,
 405                 .transceive_acf = &openpcd_transceive_acf,
 406                 .speed = RFID_14443A_SPEED_106K | RFID_14443A_SPEED_212K |
 407                          RFID_14443A_SPEED_424K, //| RFID_14443A_SPEED_848K,
 408                 .set_speed = &openpcd_14443a_set_speed,
 409         },
 410         .iso14443b = {
 411                 .init = &openpcd_14443b_init,
 412         },
 413         .mifare_classic = {
 414                 .setkey = &openpcd_mifare_setkey,
 415                 .auth = &openpcd_mifare_auth,
 416         },
 417 };