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