git.rot13.org Git - librfid/blob - src/rfid_reader_cm5121.c

   1 /* Omnikey CardMan 5121 specific RC632 transport layer
   2  *
   3  * (C) 2005 by Harald Welte <laforge@gnumonks.org>
   4  *
   5  * The 5121 is an Atmel AT89C5122 based USB CCID reader (probably the same
   6  * design like the 3121).  It's CL RC632 is connected via address/data bus,
   7  * not via SPI.
   8  *
   9  * The vendor-supplied reader firmware provides some undocumented extensions
  10  * to CCID (via PC_to_RDR_Escape) that allow access to registers and FIFO of
  11  * the RC632.
  12  *
  13  */
  14
  15 /*
  16  *  This program is free software; you can redistribute it and/or modify
  17  *  it under the terms of the GNU General Public License version 2
  18  *  as published by the Free Software Foundation
  19  *
  20  *  This program is distributed in the hope that it will be useful,
  21  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  *  GNU General Public License for more details.
  24  *
  25  *  You should have received a copy of the GNU General Public License
  26  *  along with this program; if not, write to the Free Software
  27  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  28  */
  29
  30 #include <stdlib.h>
  31 #include <unistd.h>
  32 #include <string.h>
  33 #include <errno.h>
  34
  35 #include <librfid/rfid.h>
  36 #include <librfid/rfid_reader.h>
  37 #include <librfid/rfid_asic.h>
  38 #include <librfid/rfid_asic_rc632.h>
  39 #include <librfid/rfid_reader_cm5121.h>
  40
  41 /* FIXME */
  42 #include "rc632.h"
  43
  44 #define SENDBUF_LEN     256+7+10 /* 256bytes max FSD/FSC, plus 7 bytes header,
  45                                     plus 10 bytes reserve */
  46 #define RECVBUF_LEN     SENDBUF_LEN
  47
  48 //#define DEBUG_REGISTER
  49
  50 #ifdef DEBUG_REGISTER
  51 #define DEBUGRC DEBUGPC
  52 #define DEBUGR DEBUGP
  53 #else
  54 #define DEBUGRC(x, args ...)    do {} while(0)
  55 #define DEBUGR(x, args ...)     do {} while(0)
  56 #endif
  57
  58 static
  59 int Write1ByteToReg(struct rfid_asic_transport_handle *rath,
  60                     unsigned char reg, unsigned char value)
  61 {
  62         unsigned char sndbuf[SENDBUF_LEN];
  63         unsigned char rcvbuf[RECVBUF_LEN];
  64         unsigned int retlen = RECVBUF_LEN;
  65
  66         sndbuf[0] = 0x20;
  67         sndbuf[1] = 0x00;
  68         sndbuf[2] = 0x01;
  69         sndbuf[3] = 0x00;
  70         sndbuf[4] = 0x00;
  71         sndbuf[5] = 0x00;
  72         sndbuf[6] = reg;
  73         sndbuf[7] = value;
  74
  75         DEBUGR("reg=0x%02x, val=%02x: ", reg, value);
  76
  77         if (PC_to_RDR_Escape(rath->data, sndbuf, 8, rcvbuf,
  78                              &retlen) == 0) {
  79                 DEBUGRC("OK\n");
  80                 return 0;
  81         }
  82
  83         DEBUGRC("ERROR\n");
  84         return -1;
  85 }
  86
  87 static int Read1ByteFromReg(struct rfid_asic_transport_handle *rath,
  88                             unsigned char reg,
  89                             unsigned char *value)
  90 {
  91         unsigned char sndbuf[SENDBUF_LEN];
  92         unsigned char recvbuf[RECVBUF_LEN];
  93         unsigned int retlen = sizeof(recvbuf);
  94
  95         sndbuf[0] = 0x20;
  96         sndbuf[1] = 0x00;
  97         sndbuf[2] = 0x00;
  98         sndbuf[3] = 0x00;
  99         sndbuf[4] = 0x01;
 100         sndbuf[5] = 0x00;
 101         sndbuf[6] = reg;
 102
 103         if (PC_to_RDR_Escape(rath->data, sndbuf, 7, recvbuf,
 104                              &retlen) == 0) {
 105                 *value = recvbuf[1];
 106                 DEBUGR("reg=0x%02x, val=%02x: ", reg, *value);
 107                 DEBUGRC("OK\n");
 108                 return 0;
 109         }
 110
 111         DEBUGRC("ERROR\n");
 112         return -1;
 113 }
 114
 115 static int ReadNBytesFromFIFO(struct rfid_asic_transport_handle *rath,
 116                               unsigned char num_bytes,
 117                               unsigned char *buf)
 118 {
 119         unsigned char sndbuf[SENDBUF_LEN];
 120         unsigned char recvbuf[0x7f];
 121         unsigned int retlen = sizeof(recvbuf);
 122
 123         sndbuf[0] = 0x20;
 124         sndbuf[1] = 0x00;
 125         sndbuf[2] = 0x00;
 126         sndbuf[3] = 0x00;
 127         sndbuf[4] = num_bytes;
 128         sndbuf[5] = 0x00;
 129         sndbuf[6] = 0x02;
 130
 131         DEBUGR("num_bytes=%u: ", num_bytes);
 132         if (PC_to_RDR_Escape(rath->data, sndbuf, 7, recvbuf, &retlen) == 0) {
 133                 DEBUGRC("%u [%s]\n", retlen,
 134                         rfid_hexdump(recvbuf+1, num_bytes));
 135                 memcpy(buf, recvbuf+1, num_bytes); // len == 0x7f
 136                 return 0;
 137         }
 138
 139         DEBUGRC("ERROR\n");
 140         return -1;
 141 }
 142
 143 static int WriteNBytesToFIFO(struct rfid_asic_transport_handle *rath,
 144                              unsigned char len,
 145                              const unsigned char *bytes,
 146                              unsigned char flags)
 147 {
 148         unsigned char sndbuf[SENDBUF_LEN];
 149         unsigned char recvbuf[0x7f];
 150         unsigned int retlen = sizeof(recvbuf);
 151
 152         sndbuf[0] = 0x20;
 153         sndbuf[1] = 0x00;
 154         sndbuf[2] = len;
 155         sndbuf[3] = 0x00;
 156         sndbuf[4] = 0x00;
 157         sndbuf[5] = flags;
 158         sndbuf[6] = 0x02;
 159
 160         DEBUGR("%u [%s]: ", len, rfid_hexdump(bytes, len));
 161
 162         memcpy(sndbuf+7, bytes, len);
 163
 164         if (PC_to_RDR_Escape(rath->data, sndbuf, len+7, recvbuf, &retlen) == 0) {
 165                 DEBUGRC("OK (%u [%s])\n", retlen, rfid_hexdump(recvbuf, retlen));
 166                 return 0;
 167         }
 168
 169         DEBUGRC("ERROR\n");
 170         return -1;
 171 }
 172
 173 #if 0
 174 static int TestFIFO(struct rc632_handle *handle)
 175 {
 176         unsigned char sndbuf[60]; // 0x3c
 177
 178         // FIXME: repne stosd, call
 179
 180         memset(sndbuf, 0, sizeof(sndbuf));
 181
 182         if (WriteNBytesToFIFO(handle, sizeof(sndbuf), sndbuf, 0) < 0)
 183                 return -1;
 184
 185         return ReadNBytesFromFIFO(handle, sizeof(sndbuf), sndbuf);
 186 }
 187 #endif
 188
 189 static int cm5121_transceive(struct rfid_reader_handle *rh,
 190                              enum rfid_frametype frametype,
 191                              const unsigned char *tx_data, unsigned int tx_len,
 192                              unsigned char *rx_data, unsigned int *rx_len,
 193                              u_int64_t timeout, unsigned int flags)
 194 {
 195         return rh->ah->asic->priv.rc632.fn.transceive(rh->ah, frametype,
 196                                                 tx_data, tx_len, rx_data,
 197                                                 rx_len, timeout, flags);
 198 }
 199
 200 static int cm5121_transceive_sf(struct rfid_reader_handle *rh,
 201                                unsigned char cmd, struct iso14443a_atqa *atqa)
 202 {
 203         return rh->ah->asic->priv.rc632.fn.iso14443a.transceive_sf(rh->ah,
 204                                                                    cmd,
 205                                                                    atqa);
 206 }
 207
 208 static int
 209 cm5121_transceive_acf(struct rfid_reader_handle *rh,
 210                       struct iso14443a_anticol_cmd *cmd,
 211                       unsigned int *bit_of_col)
 212 {
 213         return rh->ah->asic->priv.rc632.fn.iso14443a.transceive_acf(rh->ah,
 214                                                          cmd, bit_of_col);
 215 }
 216
 217 static int
 218 cm5121_14443a_init(struct rfid_reader_handle *rh)
 219 {
 220         return rh->ah->asic->priv.rc632.fn.iso14443a.init(rh->ah);
 221 }
 222
 223 static int
 224 cm5121_14443a_set_speed(struct rfid_reader_handle *rh,
 225                         unsigned int tx,
 226                         unsigned int speed)
 227 {
 228         u_int8_t rate;
 229
 230         DEBUGP("setting rate: ");
 231         switch (speed) {
 232         case RFID_14443A_SPEED_106K:
 233                 rate = 0x00;
 234                 DEBUGPC("106K\n");
 235                 break;
 236         case RFID_14443A_SPEED_212K:
 237                 rate = 0x01;
 238                 DEBUGPC("212K\n");
 239                 break;
 240         case RFID_14443A_SPEED_424K:
 241                 rate = 0x02;
 242                 DEBUGPC("424K\n");
 243                 break;
 244         case RFID_14443A_SPEED_848K:
 245                 rate = 0x03;
 246                 DEBUGPC("848K\n");
 247                 break;
 248         default:
 249                 DEBUGPC("invalid\n");
 250                 return -EINVAL;
 251                 break;
 252         }
 253         return rh->ah->asic->priv.rc632.fn.iso14443a.set_speed(rh->ah,
 254                                                                 tx, rate);
 255 }
 256
 257 static int
 258 cm5121_14443b_init(struct rfid_reader_handle *rh)
 259 {
 260         return rh->ah->asic->priv.rc632.fn.iso14443b.init(rh->ah);
 261 }
 262
 263 static int
 264 cm5121_15693_init(struct rfid_reader_handle *rh)
 265 {
 266         return rh->ah->asic->priv.rc632.fn.iso15693.init(rh->ah);
 267 }
 268
 269 static int
 270 cm5121_mifare_setkey(struct rfid_reader_handle *rh, const u_int8_t *key)
 271 {
 272         return rh->ah->asic->priv.rc632.fn.mifare_classic.setkey(rh->ah, key);
 273 }
 274
 275 static int
 276 cm5121_mifare_auth(struct rfid_reader_handle *rh, u_int8_t cmd,
 277                    u_int32_t serno, u_int8_t block)
 278 {
 279         return rh->ah->asic->priv.rc632.fn.mifare_classic.auth(rh->ah,
 280                                                         cmd, serno, block);
 281 }
 282
 283 struct rfid_asic_transport cm5121_ccid = {
 284         .name = "CM5121 OpenCT",
 285         .priv.rc632 = {
 286                 .fn = {
 287                         .reg_write      = &Write1ByteToReg,
 288                         .reg_read       = &Read1ByteFromReg,
 289                         .fifo_write     = &WriteNBytesToFIFO,
 290                         .fifo_read      = &ReadNBytesFromFIFO,
 291                 },
 292         },
 293 };
 294
 295 static int cm5121_enable_rc632(struct rfid_asic_transport_handle *rath)
 296 {
 297         unsigned char tx_buf[1] = { 0x01 };
 298         unsigned char rx_buf[64];
 299         unsigned int rx_len = sizeof(rx_buf);
 300
 301         PC_to_RDR_Escape(rath->data, tx_buf, 1, rx_buf, &rx_len);
 302         printf("received %u bytes from 01 command\n", rx_len);
 303
 304         return 0;
 305 }
 306
 307 static struct rfid_reader_handle *
 308 cm5121_open(void *data)
 309 {
 310         struct rfid_reader_handle *rh;
 311         struct rfid_asic_transport_handle *rath;
 312
 313         rh = malloc(sizeof(*rh));
 314         if (!rh)
 315                 return NULL;
 316         memset(rh, 0, sizeof(*rh));
 317
 318         rath = malloc(sizeof(*rath));
 319         if (!rath)
 320                 goto out_rh;
 321         memset(rath, 0, sizeof(*rath));
 322
 323         rath->rat = &cm5121_ccid;
 324         rh->reader = &rfid_reader_cm5121;
 325
 326         if (cm5121_source_init(rath) < 0)
 327                 goto out_rath;
 328
 329         if (cm5121_enable_rc632(rath) < 0)
 330                 goto out_rath;
 331
 332         rh->ah = rc632_open(rath);
 333         if (!rh->ah)
 334                 goto out_rath;
 335
 336         DEBUGP("returning %p\n", rh);
 337         return rh;
 338
 339 out_rath:
 340         free(rath);
 341 out_rh:
 342         free(rh);
 343
 344         return NULL;
 345 }
 346
 347 static void
 348 cm5121_close(struct rfid_reader_handle *rh)
 349 {
 350         struct rfid_asic_transport_handle *rath = rh->ah->rath;
 351         rc632_close(rh->ah);
 352         free(rath);
 353         free(rh);
 354 }
 355
 356 struct rfid_reader rfid_reader_cm5121 = {
 357         .name   = "Omnikey CardMan 5121 RFID",
 358         .open = &cm5121_open,
 359         .close = &cm5121_close,
 360         .transceive = &cm5121_transceive,
 361         .iso14443a = {
 362                 .init = &cm5121_14443a_init,
 363                 .transceive_sf = &cm5121_transceive_sf,
 364                 .transceive_acf = &cm5121_transceive_acf,
 365                 .speed = RFID_14443A_SPEED_106K | RFID_14443A_SPEED_212K |
 366                          RFID_14443A_SPEED_424K, //| RFID_14443A_SPEED_848K,
 367                 .set_speed = &cm5121_14443a_set_speed,
 368         },
 369         .iso14443b = {
 370                 .init = &cm5121_14443b_init,
 371         },
 372         .mifare_classic = {
 373                 .setkey = &cm5121_mifare_setkey,
 374                 .auth = &cm5121_mifare_auth,
 375         },
 376 };
 377
 378