src/hardware/hung-chang-dso-2100/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2015 Daniel Glöckner <daniel-gl@gmx.net>
   5  *
   6  * This program is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <config.h>
  21 #include <ieee1284.h>
  22 #include <string.h>
  23 #include "protocol.h"
  24
  25 static const uint32_t scanopts[] = {
  26         SR_CONF_CONN,
  27 };
  28
  29 static const uint32_t drvopts[] = {
  30         SR_CONF_OSCILLOSCOPE,
  31 };
  32
  33 static const uint32_t devopts[] = {
  34         SR_CONF_CONN | SR_CONF_GET,
  35         SR_CONF_LIMIT_FRAMES | SR_CONF_GET | SR_CONF_SET,
  36         SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  37         SR_CONF_TRIGGER_SOURCE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  38         SR_CONF_TRIGGER_SLOPE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  39         SR_CONF_BUFFERSIZE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  40 };
  41
  42 static const uint32_t cgopts[] = {
  43         SR_CONF_VDIV | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  44         SR_CONF_COUPLING | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  45         SR_CONF_PROBE_FACTOR | SR_CONF_GET | SR_CONF_SET,
  46 };
  47
  48 static const uint64_t samplerates[] = {
  49         SR_MHZ(100), SR_MHZ(50),  SR_MHZ(25),   SR_MHZ(20),
  50         SR_MHZ(10),  SR_MHZ(5),   SR_KHZ(2500), SR_MHZ(2),
  51         SR_MHZ(1),   SR_KHZ(500), SR_KHZ(250),  SR_KHZ(200),
  52         SR_KHZ(100), SR_KHZ(50),  SR_KHZ(25),   SR_KHZ(20),
  53         SR_KHZ(10),  SR_KHZ(5),   SR_HZ(2500),  SR_KHZ(2),
  54         SR_KHZ(1),   SR_HZ(500),  SR_HZ(250),   SR_HZ(200),
  55         SR_HZ(100),  SR_HZ(50),   SR_HZ(25),    SR_HZ(20)
  56 };
  57
  58 /* must be in sync with readout_steps[] in protocol.c */
  59 static const uint64_t buffersizes[] = {
  60         2 * 500, 3 * 500, 4 * 500, 5 * 500,
  61         6 * 500, 7 * 500, 8 * 500, 9 * 500, 10 * 500,
  62         12 * 500 - 2, 14 * 500 - 2, 16 * 500 - 2,
  63         18 * 500 - 2, 20 * 500 - 2, 10240 - 2
  64 };
  65
  66 static const uint64_t vdivs[][2] = {
  67         { 10, 1000 },
  68         { 20, 1000 },
  69         { 50, 1000 },
  70         { 100, 1000 },
  71         { 200, 1000 },
  72         { 500, 1000 },
  73         { 1, 1 },
  74         { 2, 1 },
  75         { 5, 1 },
  76 };
  77
  78 /* Bits 4 and 5 enable relays that add /10 filters to the chain
  79  * Bits 0 and 1 select an output from a resistor array */
  80 static const uint8_t vdivs_map[] = {
  81         0x01, 0x02, 0x03, 0x21, 0x22, 0x23, 0x31, 0x32, 0x33
  82 };
  83
  84
  85 static const char *trigger_sources[] = {
  86         "A", "B", "EXT"
  87 };
  88
  89 static const uint8_t trigger_sources_map[] = {
  90         0x00, 0x80, 0x40
  91 };
  92
  93 static const char *trigger_slopes[] = {
  94         "f", "r"
  95 };
  96
  97 static const char *coupling[] = {
  98         "DC", "AC", "GND"
  99 };
 100
 101 static const uint8_t coupling_map[] = {
 102         0x00, 0x08, 0x04
 103 };
 104
 105 static GSList *scan_port(GSList *devices, struct parport *port)
 106 {
 107         struct sr_dev_inst *sdi;
 108         struct sr_channel *ch;
 109         struct sr_channel_group *cg;
 110         struct dev_context *devc;
 111         int i;
 112
 113         if (ieee1284_open(port, 0, &i) != E1284_OK) {
 114                 sr_err("Can't open parallel port %s", port->name);
 115                 goto fail1;
 116         }
 117
 118         if ((i & (CAP1284_RAW | CAP1284_BYTE)) != (CAP1284_RAW | CAP1284_BYTE)) {
 119                 sr_err("Parallel port %s does not provide low-level bidirection access",
 120                        port->name);
 121                 goto fail2;
 122         }
 123
 124         if (ieee1284_claim(port) != E1284_OK) {
 125                 sr_err("Parallel port %s already in use", port->name);
 126                 goto fail2;
 127         }
 128
 129         if (!hung_chang_dso_2100_check_id(port))
 130                 goto fail3;
 131
 132         sdi = g_malloc0(sizeof(struct sr_dev_inst));
 133         sdi->status = SR_ST_INACTIVE;
 134         sdi->vendor = g_strdup("Hung-Chang");
 135         sdi->model = g_strdup("DSO-2100");
 136         sdi->inst_type = 0; /* FIXME */
 137         sdi->conn = port;
 138         ieee1284_ref(port);
 139
 140         for (i = 0; i < NUM_CHANNELS; i++) {
 141                 cg = g_malloc0(sizeof(struct sr_channel_group));
 142                 cg->name = g_strdup(trigger_sources[i]);
 143                 ch = sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, FALSE, trigger_sources[i]);
 144                 cg->channels = g_slist_append(cg->channels, ch);
 145                 sdi->channel_groups = g_slist_append(sdi->channel_groups, cg);
 146         }
 147
 148         devc = g_malloc0(sizeof(struct dev_context));
 149         devc->enabled_channel = g_slist_append(NULL, NULL);
 150         devc->channel = 0;
 151         devc->rate = 0;
 152         devc->probe[0] = 10;
 153         devc->probe[1] = 10;
 154         devc->cctl[0] = 0x31; /* 1V/div, DC coupling, trigger on channel A*/
 155         devc->cctl[1] = 0x31; /* 1V/div, DC coupling, no tv sync trigger */
 156         devc->edge = 0;
 157         devc->tlevel = 0x80;
 158         devc->pos[0] = 0x80;
 159         devc->pos[1] = 0x80;
 160         devc->offset[0] = 0x80;
 161         devc->offset[1] = 0x80;
 162         devc->gain[0] = 0x80;
 163         devc->gain[1] = 0x80;
 164         devc->frame_limit = 0;
 165         devc->last_step = 0; /* buffersize = 1000 */
 166         sdi->priv = devc;
 167
 168         devices = g_slist_append(devices, sdi);
 169
 170 fail3:
 171         ieee1284_release(port);
 172 fail2:
 173         ieee1284_close(port);
 174 fail1:
 175         return devices;
 176 }
 177
 178 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 179 {
 180         struct parport_list ports;
 181         struct sr_config *src;
 182         const char *conn = NULL;
 183         GSList *devices, *option;
 184         gboolean port_found;
 185         int i;
 186
 187
 188         for (option = options; option; option = option->next) {
 189                 src = option->data;
 190                 if (src->key == SR_CONF_CONN) {
 191                         conn = g_variant_get_string(src->data, NULL);
 192                         break;
 193                 }
 194         }
 195
 196         if (!conn)
 197                 return NULL;
 198
 199         if (ieee1284_find_ports(&ports, 0) != E1284_OK)
 200                 return NULL;
 201
 202         devices = NULL;
 203         port_found = FALSE;
 204         for (i = 0; i < ports.portc; i++)
 205                 if (!strcmp(ports.portv[i]->name, conn)) {
 206                         port_found = TRUE;
 207                         devices = scan_port(devices, ports.portv[i]);
 208                 }
 209
 210         if (!port_found) {
 211                 sr_err("Parallel port %s not found. Valid names are:", conn);
 212                 for (i = 0; i < ports.portc; i++)
 213                         sr_err("\t%s", ports.portv[i]->name);
 214         }
 215
 216         ieee1284_free_ports(&ports);
 217
 218         return std_scan_complete(di, devices);
 219 }
 220
 221 static void clear_private(void *priv)
 222 {
 223         struct dev_context *devc = priv;
 224
 225         g_slist_free(devc->enabled_channel);
 226 }
 227
 228 static int dev_clear(const struct sr_dev_driver *di)
 229 {
 230         struct drv_context *drvc = di->context;
 231         struct sr_dev_inst *sdi;
 232         GSList *l;
 233
 234         if (drvc) {
 235                 for (l = drvc->instances; l; l = l->next) {
 236                         sdi = l->data;
 237                         ieee1284_unref(sdi->conn);
 238                 }
 239         }
 240
 241         return std_dev_clear(di, clear_private);
 242 }
 243
 244 static int dev_open(struct sr_dev_inst *sdi)
 245 {
 246         struct dev_context *devc = sdi->priv;
 247         int i;
 248
 249         if (sdi->status != SR_ST_INACTIVE)
 250                 goto fail1;
 251
 252         if (ieee1284_open(sdi->conn, 0, &i) != E1284_OK)
 253                 goto fail1;
 254
 255         if (ieee1284_claim(sdi->conn) != E1284_OK)
 256                 goto fail2;
 257
 258         if (ieee1284_data_dir(sdi->conn, 1) != E1284_OK)
 259                 goto fail3;
 260
 261         if (hung_chang_dso_2100_move_to(sdi, 1))
 262                 goto fail3;
 263
 264         devc->samples = g_try_malloc(1000 * sizeof(*devc->samples));
 265         if (!devc->samples)
 266                 goto fail3;
 267
 268         sdi->status = SR_ST_ACTIVE;
 269
 270         return SR_OK;
 271
 272 fail3:
 273         hung_chang_dso_2100_reset_port(sdi->conn);
 274         ieee1284_release(sdi->conn);
 275 fail2:
 276         ieee1284_close(sdi->conn);
 277 fail1:
 278         return SR_ERR;
 279 }
 280
 281 static int dev_close(struct sr_dev_inst *sdi)
 282 {
 283         struct dev_context *devc = sdi->priv;
 284
 285         if (sdi->status != SR_ST_ACTIVE)
 286                 return SR_OK;
 287
 288         g_free(devc->samples);
 289         hung_chang_dso_2100_reset_port(sdi->conn);
 290         ieee1284_release(sdi->conn);
 291         ieee1284_close(sdi->conn);
 292         sdi->status = SR_ST_INACTIVE;
 293
 294         return SR_OK;
 295 }
 296
 297 static int find_in_array(GVariant *data, const GVariantType *type,
 298                          const void *arr, int n)
 299 {
 300         const char * const *sarr;
 301         const char *s;
 302         const uint64_t *u64arr;
 303         const uint8_t *u8arr;
 304         uint64_t u64;
 305         uint8_t u8;
 306         int i;
 307
 308         if (!g_variant_is_of_type(data, type))
 309                 return -1;
 310
 311         switch (g_variant_classify(data)) {
 312         case G_VARIANT_CLASS_STRING:
 313                 s = g_variant_get_string(data, NULL);
 314                 sarr = arr;
 315
 316                 for (i = 0; i < n; i++)
 317                         if (!strcmp(s, sarr[i]))
 318                                 return i;
 319                 break;
 320         case G_VARIANT_CLASS_UINT64:
 321                 u64 = g_variant_get_uint64(data);
 322                 u64arr = arr;
 323
 324                 for (i = 0; i < n; i++)
 325                         if (u64 == u64arr[i])
 326                                 return i;
 327                 break;
 328         case G_VARIANT_CLASS_BYTE:
 329                 u8 = g_variant_get_byte(data);
 330                 u8arr = arr;
 331
 332                 for (i = 0; i < n; i++)
 333                         if (u8 == u8arr[i])
 334                                 return i;
 335         default:
 336                 break;
 337         }
 338
 339         return -1;
 340 }
 341
 342 static int reverse_map(uint8_t u, const uint8_t *arr, int n)
 343 {
 344         GVariant *v = g_variant_new_byte(u);
 345         int i = find_in_array(v, G_VARIANT_TYPE_BYTE, arr, n);
 346         g_variant_unref(v);
 347         return i;
 348 }
 349
 350 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 351                 const struct sr_channel_group *cg)
 352 {
 353         struct dev_context *devc = sdi->priv;
 354         struct parport *port;
 355         int ret, i, ch = -1;
 356
 357         if (cg) /* sr_config_get will validate cg using config_list */
 358                 ch = ((struct sr_channel *)cg->channels->data)->index;
 359
 360         ret = SR_OK;
 361         switch (key) {
 362         case SR_CONF_CONN:
 363                 port = sdi->conn;
 364                 *data = g_variant_new_string(port->name);
 365                 break;
 366         case SR_CONF_LIMIT_FRAMES:
 367                 *data = g_variant_new_uint64(devc->frame_limit);
 368                 break;
 369         case SR_CONF_SAMPLERATE:
 370                 *data = g_variant_new_uint64(samplerates[devc->rate]);
 371                 break;
 372         case SR_CONF_TRIGGER_SOURCE:
 373                 i = reverse_map(devc->cctl[0] & 0xC0, trigger_sources_map,
 374                                 ARRAY_SIZE(trigger_sources_map));
 375                 if (i == -1)
 376                         ret = SR_ERR;
 377                 else
 378                         *data = g_variant_new_string(trigger_sources[i]);
 379                 break;
 380         case SR_CONF_TRIGGER_SLOPE:
 381                 if (devc->edge >= ARRAY_SIZE(trigger_slopes))
 382                         ret = SR_ERR;
 383                 else
 384                         *data = g_variant_new_string(trigger_slopes[devc->edge]);
 385                 break;
 386         case SR_CONF_BUFFERSIZE:
 387                 *data = g_variant_new_uint64(buffersizes[devc->last_step]);
 388                 break;
 389         case SR_CONF_VDIV:
 390                 if (ch == -1) {
 391                         ret = SR_ERR_CHANNEL_GROUP;
 392                 } else {
 393                         i = reverse_map(devc->cctl[ch] & 0x33, vdivs_map,
 394                                         ARRAY_SIZE(vdivs_map));
 395                         if (i == -1)
 396                                 ret = SR_ERR;
 397                         else
 398                                 *data = g_variant_new("(tt)", vdivs[i][0],
 399                                                       vdivs[i][1]);
 400                 }
 401                 break;
 402         case SR_CONF_COUPLING:
 403                 if (ch == -1) {
 404                         ret = SR_ERR_CHANNEL_GROUP;
 405                 } else {
 406                         i = reverse_map(devc->cctl[ch] & 0x0C, coupling_map,
 407                                         ARRAY_SIZE(coupling_map));
 408                         if (i == -1)
 409                                 ret = SR_ERR;
 410                         else
 411                                 *data = g_variant_new_string(coupling[i]);
 412                 }
 413                 break;
 414         case SR_CONF_PROBE_FACTOR:
 415                 if (ch == -1)
 416                         ret = SR_ERR_CHANNEL_GROUP;
 417                 else
 418                         *data = g_variant_new_uint64(devc->probe[ch]);
 419                 break;
 420         default:
 421                 ret = SR_ERR_NA;
 422         }
 423
 424         return ret;
 425 }
 426
 427 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 428                 const struct sr_channel_group *cg)
 429 {
 430         struct dev_context *devc = sdi->priv;
 431         int ret, i, ch = -1;
 432         uint64_t u, v;
 433
 434         if (cg) /* sr_config_set will validate cg using config_list */
 435                 ch = ((struct sr_channel *)cg->channels->data)->index;
 436
 437         if (sdi->status != SR_ST_ACTIVE)
 438                 return SR_ERR_DEV_CLOSED;
 439
 440         ret = SR_OK;
 441         switch (key) {
 442         case SR_CONF_LIMIT_FRAMES:
 443                 devc->frame_limit = g_variant_get_uint64(data);
 444                 break;
 445         case SR_CONF_SAMPLERATE:
 446                 i = find_in_array(data, G_VARIANT_TYPE_UINT64,
 447                                   samplerates, ARRAY_SIZE(samplerates));
 448                 if (i == -1)
 449                         ret = SR_ERR_ARG;
 450                 else
 451                         devc->rate = i;
 452                 break;
 453         case SR_CONF_TRIGGER_SOURCE:
 454                 i = find_in_array(data, G_VARIANT_TYPE_STRING,
 455                                   trigger_sources, ARRAY_SIZE(trigger_sources));
 456                 if (i == -1)
 457                         ret = SR_ERR_ARG;
 458                 else
 459                         devc->cctl[0] = (devc->cctl[0] & 0x3F)
 460                                       | trigger_sources_map[i];
 461                 break;
 462         case SR_CONF_TRIGGER_SLOPE:
 463                 i = find_in_array(data, G_VARIANT_TYPE_STRING,
 464                                   trigger_slopes, ARRAY_SIZE(trigger_slopes));
 465                 if (i == -1)
 466                         ret = SR_ERR_ARG;
 467                 else
 468                         devc->edge = i;
 469                 break;
 470         case SR_CONF_BUFFERSIZE:
 471                 i = find_in_array(data, G_VARIANT_TYPE_UINT64,
 472                                   buffersizes, ARRAY_SIZE(buffersizes));
 473                 if (i == -1)
 474                         ret = SR_ERR_ARG;
 475                 else
 476                         devc->last_step = i;
 477                 break;
 478         case SR_CONF_VDIV:
 479                 if (ch == -1) {
 480                         ret = SR_ERR_CHANNEL_GROUP;
 481                 } else if (!g_variant_is_of_type(data, G_VARIANT_TYPE("(tt)"))) {
 482                         ret = SR_ERR_ARG;
 483                 } else {
 484                         g_variant_get(data, "(tt)", &u, &v);
 485                         for (i = 0; i < (int)ARRAY_SIZE(vdivs); i++)
 486                                 if (vdivs[i][0] == u && vdivs[i][1] == v)
 487                                         break;
 488                         if (i == ARRAY_SIZE(vdivs))
 489                                 ret = SR_ERR_ARG;
 490                         else
 491                                 devc->cctl[ch] = (devc->cctl[ch] & 0xCC)
 492                                                | vdivs_map[i];
 493                 }
 494                 break;
 495         case SR_CONF_COUPLING:
 496                 if (ch == -1) {
 497                         ret = SR_ERR_CHANNEL_GROUP;
 498                 } else {
 499                         i = find_in_array(data, G_VARIANT_TYPE_STRING,
 500                                           coupling, ARRAY_SIZE(coupling));
 501                         if (i == -1)
 502                                 ret = SR_ERR_ARG;
 503                         else
 504                                 devc->cctl[ch] = (devc->cctl[ch] & 0xF3)
 505                                                | coupling_map[i];
 506                 }
 507                 break;
 508         case SR_CONF_PROBE_FACTOR:
 509                 if (ch == -1) {
 510                         ret = SR_ERR_CHANNEL_GROUP;
 511                 } else {
 512                         u = g_variant_get_uint64(data);
 513                         if (!u)
 514                                 ret = SR_ERR_ARG;
 515                         else
 516                                 devc->probe[ch] = u;
 517                 }
 518                 break;
 519         default:
 520                 ret = SR_ERR_NA;
 521         }
 522
 523         return ret;
 524 }
 525
 526 static int config_channel_set(const struct sr_dev_inst *sdi,
 527                               struct sr_channel *ch,
 528                               unsigned int changes)
 529 {
 530         struct dev_context *devc = sdi->priv;
 531         uint8_t v;
 532
 533         if (changes & SR_CHANNEL_SET_ENABLED) {
 534                 if (ch->enabled) {
 535                         v = devc->channel | (1 << ch->index);
 536                         if (v & (v - 1))
 537                                 return SR_ERR;
 538                         devc->channel = v;
 539                         devc->enabled_channel->data = ch;
 540                 } else {
 541                         devc->channel &= ~(1 << ch->index);
 542                 }
 543         }
 544         return SR_OK;
 545 }
 546
 547 static int config_commit(const struct sr_dev_inst *sdi)
 548 {
 549         uint8_t state = hung_chang_dso_2100_read_mbox(sdi->conn, 0.02);
 550         int ret;
 551
 552         if (sdi->status != SR_ST_ACTIVE)
 553                 return SR_ERR_DEV_CLOSED;
 554
 555         switch (state) {
 556         case 0x03:
 557         case 0x14:
 558         case 0x21:
 559                 /* we will travel the complete config path on our way to state 1 */
 560                 break;
 561         case 0x00:
 562                 state = 0x01;
 563                 /* Fallthrough */
 564         default:
 565                 ret = hung_chang_dso_2100_move_to(sdi, 1);
 566                 if (ret != SR_OK)
 567                         return ret;
 568                 /* Fallthrough */
 569         case 0x01:
 570                 hung_chang_dso_2100_write_mbox(sdi->conn, 4);
 571         }
 572         ret = hung_chang_dso_2100_move_to(sdi, 1);
 573         if (ret != SR_OK)
 574                 return ret;
 575         return hung_chang_dso_2100_move_to(sdi, state);
 576 }
 577
 578 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 579                 const struct sr_channel_group *cg)
 580 {
 581         GVariantBuilder gvb;
 582         GVariant *gvar, *rational[2];
 583         GSList *l;
 584         int i;
 585
 586         switch (key) {
 587                 case SR_CONF_SCAN_OPTIONS:
 588         case SR_CONF_DEVICE_OPTIONS:
 589                 break;
 590         case SR_CONF_SAMPLERATE:
 591         case SR_CONF_TRIGGER_SOURCE:
 592         case SR_CONF_TRIGGER_SLOPE:
 593         case SR_CONF_BUFFERSIZE:
 594                 if (!sdi || cg)
 595                         return SR_ERR_NA;
 596                 break;
 597         case SR_CONF_VDIV:
 598         case SR_CONF_COUPLING:
 599                 if (!sdi)
 600                         return SR_ERR_NA;
 601                 if (!cg)
 602                         return SR_ERR_CHANNEL_GROUP;
 603                 l = g_slist_find(sdi->channel_groups, cg);
 604                 if (!l)
 605                         return SR_ERR_ARG;
 606                 break;
 607         default:
 608                 return SR_ERR_NA;
 609         }
 610
 611         switch (key) {
 612         case SR_CONF_SCAN_OPTIONS:
 613                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 614                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 615                 break;
 616         case SR_CONF_DEVICE_OPTIONS:
 617                 if (!sdi)
 618                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 619                                         drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
 620                 else if (!cg)
 621                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 622                                         devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 623                 else
 624                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 625                                         cgopts, ARRAY_SIZE(cgopts), sizeof(uint32_t));
 626                 break;
 627         case SR_CONF_SAMPLERATE:
 628                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 629                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
 630                                 samplerates, ARRAY_SIZE(samplerates), sizeof(uint64_t));
 631                 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
 632                 *data = g_variant_builder_end(&gvb);
 633                 break;
 634         case SR_CONF_TRIGGER_SOURCE:
 635                 *data = g_variant_new_strv(trigger_sources, ARRAY_SIZE(trigger_sources));
 636                 break;
 637         case SR_CONF_TRIGGER_SLOPE:
 638                 *data = g_variant_new_strv(trigger_slopes, ARRAY_SIZE(trigger_slopes));
 639                 break;
 640         case SR_CONF_BUFFERSIZE:
 641                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT64,
 642                                 buffersizes, ARRAY_SIZE(buffersizes), sizeof(uint64_t));
 643                 break;
 644         case SR_CONF_VDIV:
 645                 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 646                 for (i = 0; i < (int)ARRAY_SIZE(vdivs); i++) {
 647                         rational[0] = g_variant_new_uint64(vdivs[i][0]);
 648                         rational[1] = g_variant_new_uint64(vdivs[i][1]);
 649                         gvar = g_variant_new_tuple(rational, 2);
 650                         g_variant_builder_add_value(&gvb, gvar);
 651                 }
 652                 *data = g_variant_builder_end(&gvb);
 653                 break;
 654         case SR_CONF_COUPLING:
 655                 *data = g_variant_new_strv(coupling, ARRAY_SIZE(coupling));
 656                 break;
 657         }
 658
 659         return SR_OK;
 660 }
 661
 662 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 663 {
 664         struct dev_context *devc = sdi->priv;
 665         int ret;
 666
 667         if (sdi->status != SR_ST_ACTIVE)
 668                 return SR_ERR_DEV_CLOSED;
 669
 670         if (devc->channel) {
 671                 static const float res_array[] = {0.5, 1, 2, 5};
 672                 static const uint8_t relays[] = {100, 10, 10, 1};
 673                 devc->factor = devc->probe[devc->channel - 1] / 32.0;
 674                 devc->factor *= res_array[devc->cctl[devc->channel - 1] & 0x03];
 675                 devc->factor /= relays[(devc->cctl[devc->channel - 1] >> 4) & 0x03];
 676         }
 677         devc->frame = 0;
 678         devc->state_known = TRUE;
 679         devc->step = 0;
 680         devc->adc2 = FALSE;
 681         devc->retries = MAX_RETRIES;
 682
 683         ret = hung_chang_dso_2100_move_to(sdi, 0x21);
 684         if (ret != SR_OK)
 685                 return ret;
 686
 687         std_session_send_df_header(sdi);
 688
 689         sr_session_source_add(sdi->session, -1, 0, 8,
 690                               hung_chang_dso_2100_poll, (void *)sdi);
 691
 692         return SR_OK;
 693 }
 694
 695 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 696 {
 697         std_session_send_df_end(sdi);
 698         sr_session_source_remove(sdi->session, -1);
 699         hung_chang_dso_2100_move_to(sdi, 1);
 700
 701         return SR_OK;
 702 }
 703
 704 static struct sr_dev_driver hung_chang_dso_2100_driver_info = {
 705         .name = "hung-chang-dso-2100",
 706         .longname = "Hung-Chang DSO-2100",
 707         .api_version = 1,
 708         .init = std_init,
 709         .cleanup = std_cleanup,
 710         .scan = scan,
 711         .dev_list = std_dev_list,
 712         .dev_clear = dev_clear,
 713         .config_get = config_get,
 714         .config_set = config_set,
 715         .config_channel_set = config_channel_set,
 716         .config_commit = config_commit,
 717         .config_list = config_list,
 718         .dev_open = dev_open,
 719         .dev_close = dev_close,
 720         .dev_acquisition_start = dev_acquisition_start,
 721         .dev_acquisition_stop = dev_acquisition_stop,
 722         .context = NULL,
 723 };
 724 SR_REGISTER_DEV_DRIVER(hung_chang_dso_2100_driver_info);