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

   1 /* Omnikey CardMan 5121 specific RC632 transport layer
   2  *
   3  * (C) 2005-2006 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
  28  */
  29 #include <stdlib.h>
  30 #include <unistd.h>
  31 #include <string.h>
  32 #include <errno.h>
  33
  34 #define DEBUG_LIBRFID
  35 #include <librfid/rfid.h>
  36
  37 #ifndef LIBRFID_FIRMWARE
  38
  39
  40 #include <librfid/rfid_reader.h>
  41 #include <librfid/rfid_asic.h>
  42 #include <librfid/rfid_asic_rc632.h>
  43 #include <librfid/rfid_reader_cm5121.h>
  44 #include <librfid/rfid_layer2.h>
  45 #include <librfid/rfid_protocol.h>
  46
  47 #include "rfid_reader_rc632_common.h"
  48
  49 #include "cm5121_source.h"
  50
  51 /* FIXME */
  52 #include "rc632.h"
  53
  54 #define SENDBUF_LEN     256+7+10 /* 256bytes max FSD/FSC, plus 7 bytes header,
  55                                     plus 10 bytes reserve */
  56 #define RECVBUF_LEN     SENDBUF_LEN
  57
  58 #ifdef DEBUG_REGISTER
  59 #define DEBUGRC DEBUGPC
  60 #define DEBUGR DEBUGP
  61 #else
  62 #define DEBUGRC(x, args ...)    do {} while(0)
  63 #define DEBUGR(x, args ...)     do {} while(0)
  64 #endif
  65
  66 static
  67 int Write1ByteToReg(struct rfid_asic_transport_handle *rath,
  68                     unsigned char reg, unsigned char value)
  69 {
  70         unsigned char sndbuf[SENDBUF_LEN];
  71         unsigned char rcvbuf[RECVBUF_LEN];
  72         size_t retlen = RECVBUF_LEN;
  73
  74         sndbuf[0] = 0x20;
  75         sndbuf[1] = 0x00;
  76         sndbuf[2] = 0x01;
  77         sndbuf[3] = 0x00;
  78         sndbuf[4] = 0x00;
  79         sndbuf[5] = 0x00;
  80         sndbuf[6] = reg;
  81         sndbuf[7] = value;
  82
  83         DEBUGR("reg=0x%02x, val=%02x: ", reg, value);
  84
  85         if (PC_to_RDR_Escape(rath->data, sndbuf, 8, rcvbuf,
  86                              &retlen) == 0) {
  87                 DEBUGRC("OK\n");
  88                 return 0;
  89         }
  90
  91         DEBUGRC("ERROR\n");
  92         return -1;
  93 }
  94
  95 static int Read1ByteFromReg(struct rfid_asic_transport_handle *rath,
  96                             unsigned char reg,
  97                             unsigned char *value)
  98 {
  99         unsigned char sndbuf[SENDBUF_LEN];
 100         unsigned char recvbuf[RECVBUF_LEN];
 101         size_t retlen = sizeof(recvbuf);
 102
 103         sndbuf[0] = 0x20;
 104         sndbuf[1] = 0x00;
 105         sndbuf[2] = 0x00;
 106         sndbuf[3] = 0x00;
 107         sndbuf[4] = 0x01;
 108         sndbuf[5] = 0x00;
 109         sndbuf[6] = reg;
 110
 111         if (PC_to_RDR_Escape(rath->data, sndbuf, 7, recvbuf,
 112                              &retlen) == 0) {
 113                 *value = recvbuf[1];
 114                 DEBUGR("reg=0x%02x, val=%02x: ", reg, *value);
 115                 DEBUGRC("OK\n");
 116                 return 0;
 117         }
 118
 119         DEBUGRC("ERROR\n");
 120         return -1;
 121 }
 122
 123 static int ReadNBytesFromFIFO(struct rfid_asic_transport_handle *rath,
 124                               unsigned char num_bytes,
 125                               unsigned char *buf)
 126 {
 127         unsigned char sndbuf[SENDBUF_LEN];
 128         unsigned char recvbuf[0x7f];
 129         size_t retlen = sizeof(recvbuf);
 130
 131         sndbuf[0] = 0x20;
 132         sndbuf[1] = 0x00;
 133         sndbuf[2] = 0x00;
 134         sndbuf[3] = 0x00;
 135         sndbuf[4] = num_bytes;
 136         sndbuf[5] = 0x00;
 137         sndbuf[6] = 0x02;
 138
 139         DEBUGR("num_bytes=%u: ", num_bytes);
 140         if (PC_to_RDR_Escape(rath->data, sndbuf, 7, recvbuf, &retlen) == 0) {
 141                 DEBUGRC("%u [%s]\n", retlen,
 142                         rfid_hexdump(recvbuf+1, num_bytes));
 143                 memcpy(buf, recvbuf+1, num_bytes); // len == 0x7f
 144                 return 0;
 145         }
 146
 147         DEBUGRC("ERROR\n");
 148         return -1;
 149 }
 150
 151 static int WriteNBytesToFIFO(struct rfid_asic_transport_handle *rath,
 152                              unsigned char len,
 153                              const unsigned char *bytes,
 154                              unsigned char flags)
 155 {
 156         unsigned char sndbuf[SENDBUF_LEN];
 157         unsigned char recvbuf[0x7f];
 158         size_t retlen = sizeof(recvbuf);
 159
 160         sndbuf[0] = 0x20;
 161         sndbuf[1] = 0x00;
 162         sndbuf[2] = len;
 163         sndbuf[3] = 0x00;
 164         sndbuf[4] = 0x00;
 165         sndbuf[5] = flags;
 166         sndbuf[6] = 0x02;
 167
 168         DEBUGR("%u [%s]: ", len, rfid_hexdump(bytes, len));
 169
 170         memcpy(sndbuf+7, bytes, len);
 171
 172         if (PC_to_RDR_Escape(rath->data, sndbuf, len+7, recvbuf, &retlen) == 0) {
 173                 DEBUGRC("OK (%u [%s])\n", retlen, rfid_hexdump(recvbuf, retlen));
 174                 return 0;
 175         }
 176
 177         DEBUGRC("ERROR\n");
 178         return -1;
 179 }
 180
 181 struct rfid_asic_transport cm5121_ccid = {
 182         .name = "CM5121 OpenCT",
 183         .priv.rc632 = {
 184                 .fn = {
 185                         .reg_write      = &Write1ByteToReg,
 186                         .reg_read       = &Read1ByteFromReg,
 187                         .fifo_write     = &WriteNBytesToFIFO,
 188                         .fifo_read      = &ReadNBytesFromFIFO,
 189                 },
 190         },
 191 };
 192
 193 static int cm5121_enable_rc632(struct rfid_asic_transport_handle *rath)
 194 {
 195         unsigned char tx_buf[1] = { 0x01 };
 196         unsigned char rx_buf[64];
 197         size_t rx_len = sizeof(rx_buf);
 198
 199         PC_to_RDR_Escape(rath->data, tx_buf, 1, rx_buf, &rx_len);
 200
 201         return 0;
 202 }
 203
 204 static struct rfid_reader_handle *
 205 cm5121_open(void *data)
 206 {
 207         struct rfid_reader_handle *rh;
 208         struct rfid_asic_transport_handle *rath;
 209
 210         rh = malloc_reader_handle(sizeof(*rh));
 211         if (!rh)
 212                 return NULL;
 213         memset(rh, 0, sizeof(*rh));
 214
 215         rath = malloc_rat_handle(sizeof(*rath));
 216         if (!rath)
 217                 goto out_rh;
 218         memset(rath, 0, sizeof(*rath));
 219
 220         rath->rat = &cm5121_ccid;
 221         rh->reader = &rfid_reader_cm5121;
 222
 223         if (cm5121_source_init(rath) < 0)
 224                 goto out_rath;
 225
 226         if (cm5121_enable_rc632(rath) < 0)
 227                 goto out_rath;
 228
 229         rh->ah = rc632_open(rath);
 230         if (!rh->ah)
 231                 goto out_rath;
 232
 233         DEBUGP("returning %p\n", rh);
 234         return rh;
 235
 236 out_rath:
 237         free_rat_handle(rath);
 238 out_rh:
 239         free_reader_handle(rh);
 240
 241         return NULL;
 242 }
 243
 244 static void
 245 cm5121_close(struct rfid_reader_handle *rh)
 246 {
 247         struct rfid_asic_transport_handle *rath = rh->ah->rath;
 248         rc632_close(rh->ah);
 249         free_rat_handle(rath);
 250         free_reader_handle(rh);
 251 }
 252
 253 const struct rfid_reader rfid_reader_cm5121 = {
 254         .name   = "Omnikey CardMan 5121 RFID",
 255         .open = &cm5121_open,
 256         .close = &cm5121_close,
 257         .l2_supported = (1 << RFID_LAYER2_ISO14443A) |
 258                         (1 << RFID_LAYER2_ISO14443B) |
 259                         (1 << RFID_LAYER2_ISO15693),
 260         .proto_supported = (1 << RFID_PROTOCOL_TCL) |
 261                         (1 << RFID_PROTOCOL_MIFARE_UL) |
 262                         (1 << RFID_PROTOCOL_MIFARE_CLASSIC),
 263         .getopt = &_rdr_rc632_getopt,
 264         .setopt = &_rdr_rc632_setopt,
 265         .transceive = &_rdr_rc632_transceive,
 266         .init = &_rdr_rc632_l2_init,
 267         .iso14443a = {
 268                 .transceive_sf = &_rdr_rc632_transceive_sf,
 269                 .transceive_acf = &_rdr_rc632_transceive_acf,
 270                 .speed = RFID_14443A_SPEED_106K | RFID_14443A_SPEED_212K |
 271                          RFID_14443A_SPEED_424K, //| RFID_14443A_SPEED_848K,
 272                 .set_speed = &_rdr_rc632_14443a_set_speed,
 273         },
 274         .iso15693 = {
 275                 .transceive_ac = &_rdr_rc632_iso15693_transceive_ac,
 276         },
 277         .mifare_classic = {
 278                 .setkey = &_rdr_rc632_mifare_setkey,
 279                 .auth = &_rdr_rc632_mifare_auth,
 280         },
 281 };
 282
 283 #endif /* LIBRFID_FIRMWARE */