hardware/genericdmm/api.c

   1 /*
   2  * This file is part of the sigrok project.
   3  *
   4  * Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de>
   5  * Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  20  */
  21
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <fcntl.h>
  25 #include "libsigrok.h"
  26 #include "libsigrok-internal.h"
  27 #include "genericdmm.h"
  28
  29
  30 extern SR_PRIV struct dmmchip dmmchip_fs9922;
  31
  32 static struct sr_hwopt victor_70c_vidpid[] = {
  33         { SR_HWOPT_CONN, "1244.d237" },
  34         { 0, NULL }
  35 };
  36 static struct dev_profile dev_profiles[] = {
  37         { "victor-70c", "Victor", "70C", &dmmchip_fs9922,
  38                 DMM_TRANSPORT_USBHID, victor_70c_vidpid
  39         },
  40         { "mastech-va18b", "Mastech", "VA18B", NULL, DMM_TRANSPORT_SERIAL, NULL},
  41         { NULL, NULL, NULL, NULL, 0, NULL }
  42 };
  43
  44 static const int hwopts[] = {
  45         SR_HWOPT_MODEL,
  46         SR_HWOPT_CONN,
  47         SR_HWOPT_SERIALCOMM,
  48         0,
  49 };
  50
  51 static const int hwcaps[] = {
  52         SR_HWCAP_MULTIMETER,
  53         SR_HWCAP_LIMIT_SAMPLES,
  54         SR_HWCAP_LIMIT_MSEC,
  55         SR_HWCAP_CONTINUOUS,
  56         0,
  57 };
  58
  59 static const char *probe_names[] = {
  60         "Probe",
  61         NULL,
  62 };
  63
  64 SR_PRIV struct sr_dev_driver genericdmm_driver_info;
  65 static struct sr_dev_driver *gdi = &genericdmm_driver_info;
  66 /* TODO need a way to keep this local to the static library */
  67 SR_PRIV libusb_context *genericdmm_usb_context = NULL;
  68
  69
  70 static GSList *connect_usb(const char *conn)
  71 {
  72         struct sr_dev_inst *sdi;
  73         struct drv_context *drvc;
  74         struct dev_context *devc;
  75         libusb_device **devlist;
  76         struct libusb_device_descriptor des;
  77         GSList *devices;
  78         GRegex *reg;
  79         GMatchInfo *match;
  80         int vid, pid, bus, addr, devcnt, err, i;
  81         char *mstr;
  82
  83         drvc = gdi->priv;
  84
  85         vid = pid = bus = addr = 0;
  86         reg = g_regex_new(DMM_CONN_USB_VIDPID, 0, 0, NULL);
  87         if (g_regex_match(reg, conn, 0, &match)) {
  88                 /* Extract VID. */
  89                 if ((mstr = g_match_info_fetch(match, 1)))
  90                         vid = strtoul(mstr, NULL, 16);
  91                 g_free(mstr);
  92
  93                 /* Extract PID. */
  94                 if ((mstr = g_match_info_fetch(match, 2)))
  95                         pid = strtoul(mstr, NULL, 16);
  96                 g_free(mstr);
  97         } else {
  98                 g_match_info_unref(match);
  99                 g_regex_unref(reg);
 100                 reg = g_regex_new(DMM_CONN_USB_BUSADDR, 0, 0, NULL);
 101                 if (g_regex_match(reg, conn, 0, &match)) {
 102                         /* Extract bus. */
 103                         if ((mstr = g_match_info_fetch(match, 0)))
 104                                 bus = strtoul(mstr, NULL, 16);
 105                         g_free(mstr);
 106
 107                         /* Extract address. */
 108                         if ((mstr = g_match_info_fetch(match, 0)))
 109                                 addr = strtoul(mstr, NULL, 16);
 110                         g_free(mstr);
 111                 }
 112         }
 113         g_match_info_unref(match);
 114         g_regex_unref(reg);
 115
 116         if (vid + pid + bus + addr == 0)
 117                 return NULL;
 118
 119         if (bus > 64) {
 120                 sr_err("invalid bus");
 121                 return NULL;
 122         }
 123
 124         if (addr > 127) {
 125                 sr_err("invalid address");
 126                 return NULL;
 127         }
 128
 129         /* Looks like a valid USB device specification, but is it connected? */
 130         devices = NULL;
 131         libusb_get_device_list(genericdmm_usb_context, &devlist);
 132         for (i = 0; devlist[i]; i++) {
 133                 if ((err = libusb_get_device_descriptor(devlist[i], &des))) {
 134                         sr_err("genericdmm: failed to get device descriptor: %d", err);
 135                         continue;
 136                 }
 137
 138                 if (vid + pid && (des.idVendor != vid || des.idProduct != pid))
 139                         /* VID/PID specified, but no match. */
 140                         continue;
 141
 142                 if (bus + addr && (
 143                                 libusb_get_bus_number(devlist[i]) != bus
 144                                 || libusb_get_device_address(devlist[i]) != addr))
 145                         /* Bus/address specified, but no match. */
 146                         continue;
 147
 148                 /* Found one. */
 149                 if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
 150                         sr_err("genericdmm: devc malloc failed.");
 151                         return 0;
 152                 }
 153
 154                 devcnt = g_slist_length(drvc->instances);
 155                 if (!(sdi = sr_dev_inst_new(devcnt, SR_ST_ACTIVE,
 156                                 NULL, NULL, NULL))) {
 157                         sr_err("genericdmm: sr_dev_inst_new returned NULL.");
 158                         return NULL;
 159                 }
 160                 sdi->priv = devc;
 161                 devc->usb = sr_usb_dev_inst_new(
 162                                 libusb_get_bus_number(devlist[i]),
 163                                 libusb_get_device_address(devlist[i]), NULL);
 164                 devices = g_slist_append(devices, sdi);
 165         }
 166         libusb_free_device_list(devlist, 1);
 167
 168         return devices;
 169 }
 170
 171 static GSList *connect_serial(const char *conn, const char *serialcomm)
 172 {
 173         GSList *devices;
 174
 175         devices = NULL;
 176
 177         /* TODO */
 178         sr_dbg("not yet implemented");
 179
 180         return devices;
 181 }
 182
 183 GSList *genericdmm_connect(const char *conn, const char *serialcomm)
 184 {
 185         GSList *devices;
 186
 187         if (serialcomm)
 188                 /* Must be a serial port. */
 189                 return connect_serial(conn, serialcomm);
 190
 191         if ((devices = connect_usb(conn)))
 192                 return devices;
 193
 194         return NULL;
 195 }
 196
 197 static GSList *default_scan(GSList *options)
 198 {
 199         GSList *l, *devices;
 200         struct sr_hwopt *opt;
 201         const char *conn, *serialcomm;
 202
 203         devices = NULL;
 204         conn = serialcomm = NULL;
 205         for (l = options; l; l = l->next) {
 206                 opt = l->data;
 207                 switch (opt->hwopt) {
 208                 case SR_HWOPT_CONN:
 209                         conn = opt->value;
 210                         break;
 211                 case SR_HWOPT_SERIALCOMM:
 212                         serialcomm = opt->value;
 213                         break;
 214                 }
 215         }
 216         if (conn)
 217                 devices = genericdmm_connect(conn, serialcomm);
 218
 219         return devices;
 220 }
 221
 222 static int hw_init(void)
 223 {
 224         struct drv_context *drvc;
 225
 226         if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
 227                 sr_err("genericdmm: driver context malloc failed.");
 228                 return SR_ERR;
 229         }
 230
 231         if (libusb_init(&genericdmm_usb_context) != 0) {
 232                 sr_err("genericdmm: Failed to initialize USB.");
 233                 return SR_ERR;
 234         }
 235
 236         gdi->priv = drvc;
 237
 238         return SR_OK;
 239 }
 240
 241 static GSList *hw_scan(GSList *options)
 242 {
 243         GSList *l, *ldef, *defopts, *newopts, *devices;
 244         struct sr_hwopt *opt, *defopt;
 245         struct dev_profile *pr, *profile;
 246         struct sr_dev_inst *sdi;
 247         struct drv_context *drvc;
 248         const char *model;
 249
 250         drvc = gdi->priv;
 251
 252         /* Separate model from the options list. */
 253         model = NULL;
 254         newopts = NULL;
 255         for (l = options; l; l = l->next) {
 256                 opt = l->data;
 257                 if (opt->hwopt == SR_HWOPT_MODEL)
 258                         model = opt->value;
 259                 else
 260                         /* New list with references to the original data. */
 261                         newopts = g_slist_append(newopts, opt);
 262         }
 263         if (!model) {
 264                 /* This driver only works when a model is specified. */
 265                 return NULL;
 266         }
 267
 268         /* Find a profile with this model name. */
 269         profile = NULL;
 270         for (pr = dev_profiles; pr->modelid; pr++) {
 271                 if (!strcmp(pr->modelid, model)) {
 272                         profile = pr;
 273                         break;
 274                 }
 275         }
 276         if (!profile) {
 277                 sr_err("Unknown model %s.", model);
 278                 return NULL;
 279         }
 280
 281         /* Initialize the DMM chip driver. */
 282         if (profile->chip->init)
 283                 profile->chip->init();
 284
 285         /* Convert the profile's default options list to a GSList. */
 286         defopts = NULL;
 287         for (opt = profile->defaults_opts; opt->hwopt; opt++) {
 288                 /* New list with references to const data in the profile. */
 289                 defopts = g_slist_append(defopts, opt);
 290         }
 291
 292         /* Options given as argument to this function override the
 293          * profile's default options.
 294          */
 295         for (ldef = defopts; ldef; ldef = ldef->next) {
 296                 defopt = ldef->data;
 297                 for (l = newopts; l; l = l->next) {
 298                         opt = l->data;
 299                         if (opt->hwopt == defopt->hwopt) {
 300                                 /* Override the default, and drop it from the
 301                                  * options list.
 302                                  */
 303                                 ldef->data = l->data;
 304                                 newopts = g_slist_remove(newopts, opt);
 305                                 break;
 306                         }
 307                 }
 308         }
 309         /* Whatever is left in newopts wasn't in the default options. */
 310         defopts = g_slist_concat(defopts, newopts);
 311         g_slist_free(newopts);
 312
 313         if (profile->chip->scan)
 314                 /* The DMM chip driver wants to do its own scanning. */
 315                 devices = profile->chip->scan(defopts);
 316         else
 317                 devices = default_scan(defopts);
 318         g_slist_free(defopts);
 319
 320         if (devices) {
 321                 /* TODO: need to fix up sdi->index fields */
 322                 for (l = devices; l; l = l->next) {
 323                         /* The default connection-based scanner doesn't really
 324                          * know about profiles, so it never filled in the vendor
 325                          * or model. Do that now.
 326                          */
 327                         sdi = l->data;
 328                         sdi->driver = gdi;
 329                         if (!sdi->vendor)
 330                                 sdi->vendor = g_strdup(profile->vendor);
 331                         if (!sdi->model)
 332                                 sdi->model = g_strdup(profile->model);
 333                         /* Add a copy of these new devices to the driver instances. */
 334                         drvc->instances = g_slist_append(drvc->instances, l->data);
 335                 }
 336         }
 337
 338         return devices;
 339 }
 340
 341 static int hw_dev_open(struct sr_dev_inst *sdi)
 342 {
 343         struct dev_context *devc;
 344
 345         if (!(devc = sdi->priv)) {
 346                 sr_err("genericdmm: sdi->priv was NULL.");
 347                 return SR_ERR_BUG;
 348         }
 349
 350         sr_dbg("genericdmm: Opening serial port '%s'.", devc->serial->port);
 351
 352         switch (devc->profile->transport) {
 353         case DMM_TRANSPORT_USBHID:
 354                 /* TODO */
 355                 break;
 356         case DMM_TRANSPORT_SERIAL:
 357                 /* TODO: O_NONBLOCK? */
 358                 devc->serial->fd = serial_open(devc->serial->port, O_RDWR | O_NONBLOCK);
 359                 if (devc->serial->fd == -1) {
 360                         sr_err("genericdmm: Couldn't open serial port '%s'.",
 361                                devc->serial->port);
 362                         return SR_ERR;
 363                 }
 364                 //      serial_set_params(devc->serial->fd, 2400, 8, 0, 1, 2);
 365                 break;
 366         default:
 367                 sr_err("No transport set.");
 368         }
 369
 370         return SR_OK;
 371 }
 372
 373 static int hw_dev_close(struct sr_dev_inst *sdi)
 374 {
 375         struct dev_context *devc;
 376
 377         if (!(devc = sdi->priv)) {
 378                 sr_err("genericdmm: %s: sdi->priv was NULL.", __func__);
 379                 return SR_ERR_BUG;
 380         }
 381
 382         switch (devc->profile->transport) {
 383         case DMM_TRANSPORT_USBHID:
 384                 /* TODO */
 385                 break;
 386         case DMM_TRANSPORT_SERIAL:
 387                 if (devc->serial && devc->serial->fd != -1) {
 388                         serial_close(devc->serial->fd);
 389                         devc->serial->fd = -1;
 390                         sdi->status = SR_ST_INACTIVE;
 391                 }
 392                 break;
 393         }
 394
 395         return SR_OK;
 396 }
 397
 398 static int hw_cleanup(void)
 399 {
 400         GSList *l;
 401         struct sr_dev_inst *sdi;
 402         struct dev_context *devc;
 403         struct drv_context *drvc;
 404
 405         if (!(drvc = gdi->priv))
 406                 return SR_OK;
 407
 408         /* Properly close and free all devices. */
 409         for (l = drvc->instances; l; l = l->next) {
 410                 if (!(sdi = l->data)) {
 411                         /* Log error, but continue cleaning up the rest. */
 412                         sr_err("genericdmm: sdi was NULL, continuing.");
 413                         continue;
 414                 }
 415                 if (!(devc = sdi->priv)) {
 416                         /* Log error, but continue cleaning up the rest. */
 417                         sr_err("genericdmm: sdi->priv was NULL, continuing.");
 418                         continue;
 419                 }
 420
 421                 if (devc->profile) {
 422                         switch (devc->profile->transport) {
 423                         case DMM_TRANSPORT_USBHID:
 424                                 /* TODO */
 425                                 sr_usb_dev_inst_free(devc->usb);
 426                                 break;
 427                         case DMM_TRANSPORT_SERIAL:
 428                                 if (devc->serial && devc->serial->fd != -1)
 429                                         serial_close(devc->serial->fd);
 430                                 sr_serial_dev_inst_free(devc->serial);
 431                                 break;
 432                         }
 433                 }
 434
 435                 sr_dev_inst_free(sdi);
 436         }
 437
 438         g_slist_free(drvc->instances);
 439         drvc->instances = NULL;
 440
 441         if (genericdmm_usb_context)
 442                 libusb_exit(genericdmm_usb_context);
 443
 444         return SR_OK;
 445 }
 446
 447 static int hw_info_get(int info_id, const void **data,
 448                 const struct sr_dev_inst *sdi)
 449 {
 450         struct dev_context *devc;
 451
 452         (void)sdi;
 453         (void)devc;
 454
 455         switch (info_id) {
 456         case SR_DI_HWOPTS:
 457                 *data = hwopts;
 458                 break;
 459         case SR_DI_HWCAPS:
 460                 *data = hwcaps;
 461                 break;
 462         case SR_DI_NUM_PROBES:
 463                 *data = GINT_TO_POINTER(1);
 464                 break;
 465         case SR_DI_PROBE_NAMES:
 466                 *data = probe_names;
 467                 break;
 468         case SR_DI_CUR_SAMPLERATE:
 469                 /* TODO get rid of this */
 470                 *data = NULL;
 471                 break;
 472         default:
 473                 /* Unknown device info ID. */
 474                 return SR_ERR_ARG;
 475         }
 476
 477         return SR_OK;
 478 }
 479
 480 static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
 481                 const void *value)
 482 {
 483         struct dev_context *devc;
 484
 485         if (!(devc = sdi->priv)) {
 486                 sr_err("genericdmm: sdi->priv was NULL.");
 487                 return SR_ERR_BUG;
 488         }
 489
 490         switch (hwcap) {
 491         case SR_HWCAP_LIMIT_MSEC:
 492                 if (*(const uint64_t *)value == 0) {
 493                         sr_err("genericdmm: LIMIT_MSEC can't be 0.");
 494                         return SR_ERR;
 495                 }
 496                 devc->limit_msec = *(const uint64_t *)value;
 497                 sr_dbg("genericdmm: Setting LIMIT_MSEC to %" PRIu64 ".",
 498                        devc->limit_msec);
 499                 break;
 500         case SR_HWCAP_LIMIT_SAMPLES:
 501                 devc->limit_samples = *(const uint64_t *)value;
 502                 sr_dbg("genericdmm: Setting LIMIT_SAMPLES to %" PRIu64 ".",
 503                        devc->limit_samples);
 504                 break;
 505         default:
 506                 sr_err("genericdmm: Unknown capability: %d.", hwcap);
 507                 return SR_ERR;
 508                 break;
 509         }
 510
 511         return SR_OK;
 512 }
 513
 514 static int receive_data(int fd, int revents, void *cb_data)
 515 {
 516         struct sr_dev_inst *sdi;
 517         struct dev_context *devc;
 518
 519         if (!(sdi = cb_data))
 520                 return FALSE;
 521
 522         if (!(devc = sdi->priv))
 523                 return FALSE;
 524
 525         if (revents != G_IO_IN) {
 526                 sr_err("genericdmm: No data?");
 527                 return FALSE;
 528         }
 529
 530         switch (devc->profile->transport) {
 531         case DMM_TRANSPORT_USBHID:
 532                 /* TODO */
 533                 break;
 534         case DMM_TRANSPORT_SERIAL:
 535                 /* TODO */
 536                 break;
 537         }
 538
 539         return TRUE;
 540 }
 541
 542 static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
 543                 void *cb_data)
 544 {
 545         struct sr_datafeed_packet packet;
 546         struct sr_datafeed_header header;
 547         struct sr_datafeed_meta_analog meta;
 548         struct dev_context *devc;
 549
 550         if (!(devc = sdi->priv)) {
 551                 sr_err("genericdmm: sdi->priv was NULL.");
 552                 return SR_ERR_BUG;
 553         }
 554
 555         sr_dbg("genericdmm: Starting acquisition.");
 556
 557         devc->cb_data = cb_data;
 558
 559         /* Send header packet to the session bus. */
 560         sr_dbg("genericdmm: Sending SR_DF_HEADER.");
 561         packet.type = SR_DF_HEADER;
 562         packet.payload = (uint8_t *)&header;
 563         header.feed_version = 1;
 564         gettimeofday(&header.starttime, NULL);
 565         sr_session_send(devc->cb_data, &packet);
 566
 567         /* Send metadata about the SR_DF_ANALOG packets to come. */
 568         sr_dbg("genericdmm: Sending SR_DF_META_ANALOG.");
 569         packet.type = SR_DF_META_ANALOG;
 570         packet.payload = &meta;
 571         meta.num_probes = 1;
 572         sr_session_send(devc->cb_data, &packet);
 573
 574         /* Hook up a proxy handler to receive data from the device. */
 575         switch (devc->profile->transport) {
 576         case DMM_TRANSPORT_USBHID:
 577                 /* TODO libusb FD setup */
 578                 break;
 579         case DMM_TRANSPORT_SERIAL:
 580                 /* TODO serial FD setup */
 581                 // sr_source_add(devc->serial->fd, G_IO_IN, -1, receive_data, sdi);
 582                 break;
 583         }
 584
 585         return SR_OK;
 586 }
 587
 588 static int hw_dev_acquisition_stop(const struct sr_dev_inst *sdi,
 589                 void *cb_data)
 590 {
 591         struct sr_datafeed_packet packet;
 592
 593         /* Avoid compiler warnings. */
 594         (void)sdi;
 595
 596         sr_dbg("genericdmm: Stopping acquisition.");
 597
 598         /* Send end packet to the session bus. */
 599         sr_dbg("genericdmm: Sending SR_DF_END.");
 600         packet.type = SR_DF_END;
 601         sr_session_send(cb_data, &packet);
 602
 603         return SR_OK;
 604 }
 605
 606 SR_PRIV struct sr_dev_driver genericdmm_driver_info = {
 607         .name = "genericdmm",
 608         .longname = "Generic DMM",
 609         .api_version = 1,
 610         .init = hw_init,
 611         .cleanup = hw_cleanup,
 612         .scan = hw_scan,
 613         .dev_open = hw_dev_open,
 614         .dev_close = hw_dev_close,
 615         .info_get = hw_info_get,
 616         .dev_config_set = hw_dev_config_set,
 617         .dev_acquisition_start = hw_dev_acquisition_start,
 618         .dev_acquisition_stop = hw_dev_acquisition_stop,
 619         .priv = NULL,
 620 };