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 (ieee1284_open(sdi->conn, 0, &i) != E1284_OK)
 250                 goto fail1;
 251
 252         if (ieee1284_claim(sdi->conn) != E1284_OK)
 253                 goto fail2;
 254
 255         if (ieee1284_data_dir(sdi->conn, 1) != E1284_OK)
 256                 goto fail3;
 257
 258         if (hung_chang_dso_2100_move_to(sdi, 1))
 259                 goto fail3;
 260
 261         devc->samples = g_try_malloc(1000 * sizeof(*devc->samples));
 262         if (!devc->samples)
 263                 goto fail3;
 264
 265         return SR_OK;
 266
 267 fail3:
 268         hung_chang_dso_2100_reset_port(sdi->conn);
 269         ieee1284_release(sdi->conn);
 270 fail2:
 271         ieee1284_close(sdi->conn);
 272 fail1:
 273         return SR_ERR;
 274 }
 275
 276 static int dev_close(struct sr_dev_inst *sdi)
 277 {
 278         struct dev_context *devc = sdi->priv;
 279
 280         g_free(devc->samples);
 281         hung_chang_dso_2100_reset_port(sdi->conn);
 282         ieee1284_release(sdi->conn);
 283         ieee1284_close(sdi->conn);
 284
 285         sdi->status = SR_ST_INACTIVE;
 286
 287         return SR_OK;
 288 }
 289
 290 static int find_in_array(GVariant *data, const GVariantType *type,
 291                          const void *arr, int n)
 292 {
 293         const char * const *sarr;
 294         const char *s;
 295         const uint64_t *u64arr;
 296         const uint8_t *u8arr;
 297         uint64_t u64;
 298         uint8_t u8;
 299         int i;
 300
 301         if (!g_variant_is_of_type(data, type))
 302                 return -1;
 303
 304         switch (g_variant_classify(data)) {
 305         case G_VARIANT_CLASS_STRING:
 306                 s = g_variant_get_string(data, NULL);
 307                 sarr = arr;
 308
 309                 for (i = 0; i < n; i++)
 310                         if (!strcmp(s, sarr[i]))
 311                                 return i;
 312                 break;
 313         case G_VARIANT_CLASS_UINT64:
 314                 u64 = g_variant_get_uint64(data);
 315                 u64arr = arr;
 316
 317                 for (i = 0; i < n; i++)
 318                         if (u64 == u64arr[i])
 319                                 return i;
 320                 break;
 321         case G_VARIANT_CLASS_BYTE:
 322                 u8 = g_variant_get_byte(data);
 323                 u8arr = arr;
 324
 325                 for (i = 0; i < n; i++)
 326                         if (u8 == u8arr[i])
 327                                 return i;
 328         default:
 329                 break;
 330         }
 331
 332         return -1;
 333 }
 334
 335 static int reverse_map(uint8_t u, const uint8_t *arr, int n)
 336 {
 337         GVariant *v = g_variant_new_byte(u);
 338         int i = find_in_array(v, G_VARIANT_TYPE_BYTE, arr, n);
 339         g_variant_unref(v);
 340         return i;
 341 }
 342
 343 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 344                 const struct sr_channel_group *cg)
 345 {
 346         struct dev_context *devc = sdi->priv;
 347         struct parport *port;
 348         int ret, i, ch = -1;
 349
 350         if (cg) /* sr_config_get will validate cg using config_list */
 351                 ch = ((struct sr_channel *)cg->channels->data)->index;
 352
 353         ret = SR_OK;
 354         switch (key) {
 355         case SR_CONF_CONN:
 356                 port = sdi->conn;
 357                 *data = g_variant_new_string(port->name);
 358                 break;
 359         case SR_CONF_LIMIT_FRAMES:
 360                 *data = g_variant_new_uint64(devc->frame_limit);
 361                 break;
 362         case SR_CONF_SAMPLERATE:
 363                 *data = g_variant_new_uint64(samplerates[devc->rate]);
 364                 break;
 365         case SR_CONF_TRIGGER_SOURCE:
 366                 i = reverse_map(devc->cctl[0] & 0xC0, trigger_sources_map,
 367                                 ARRAY_SIZE(trigger_sources_map));
 368                 if (i == -1)
 369                         ret = SR_ERR;
 370                 else
 371                         *data = g_variant_new_string(trigger_sources[i]);
 372                 break;
 373         case SR_CONF_TRIGGER_SLOPE:
 374                 if (devc->edge >= ARRAY_SIZE(trigger_slopes))
 375                         ret = SR_ERR;
 376                 else
 377                         *data = g_variant_new_string(trigger_slopes[devc->edge]);
 378                 break;
 379         case SR_CONF_BUFFERSIZE:
 380                 *data = g_variant_new_uint64(buffersizes[devc->last_step]);
 381                 break;
 382         case SR_CONF_VDIV:
 383                 if (ch == -1) {
 384                         ret = SR_ERR_CHANNEL_GROUP;
 385                 } else {
 386                         i = reverse_map(devc->cctl[ch] & 0x33, vdivs_map,
 387                                         ARRAY_SIZE(vdivs_map));
 388                         if (i == -1)
 389                                 ret = SR_ERR;
 390                         else
 391                                 *data = g_variant_new("(tt)", vdivs[i][0],
 392                                                       vdivs[i][1]);
 393                 }
 394                 break;
 395         case SR_CONF_COUPLING:
 396                 if (ch == -1) {
 397                         ret = SR_ERR_CHANNEL_GROUP;
 398                 } else {
 399                         i = reverse_map(devc->cctl[ch] & 0x0C, coupling_map,
 400                                         ARRAY_SIZE(coupling_map));
 401                         if (i == -1)
 402                                 ret = SR_ERR;
 403                         else
 404                                 *data = g_variant_new_string(coupling[i]);
 405                 }
 406                 break;
 407         case SR_CONF_PROBE_FACTOR:
 408                 if (ch == -1)
 409                         ret = SR_ERR_CHANNEL_GROUP;
 410                 else
 411                         *data = g_variant_new_uint64(devc->probe[ch]);
 412                 break;
 413         default:
 414                 ret = SR_ERR_NA;
 415         }
 416
 417         return ret;
 418 }
 419
 420 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 421                 const struct sr_channel_group *cg)
 422 {
 423         struct dev_context *devc = sdi->priv;
 424         int ret, i, ch = -1;
 425         uint64_t u, v;
 426
 427         if (cg) /* sr_config_set will validate cg using config_list */
 428                 ch = ((struct sr_channel *)cg->channels->data)->index;
 429
 430         ret = SR_OK;
 431         switch (key) {
 432         case SR_CONF_LIMIT_FRAMES:
 433                 devc->frame_limit = g_variant_get_uint64(data);
 434                 break;
 435         case SR_CONF_SAMPLERATE:
 436                 i = find_in_array(data, G_VARIANT_TYPE_UINT64,
 437                                   samplerates, ARRAY_SIZE(samplerates));
 438                 if (i == -1)
 439                         ret = SR_ERR_ARG;
 440                 else
 441                         devc->rate = i;
 442                 break;
 443         case SR_CONF_TRIGGER_SOURCE:
 444                 i = find_in_array(data, G_VARIANT_TYPE_STRING,
 445                                   trigger_sources, ARRAY_SIZE(trigger_sources));
 446                 if (i == -1)
 447                         ret = SR_ERR_ARG;
 448                 else
 449                         devc->cctl[0] = (devc->cctl[0] & 0x3F)
 450                                       | trigger_sources_map[i];
 451                 break;
 452         case SR_CONF_TRIGGER_SLOPE:
 453                 i = find_in_array(data, G_VARIANT_TYPE_STRING,
 454                                   trigger_slopes, ARRAY_SIZE(trigger_slopes));
 455                 if (i == -1)
 456                         ret = SR_ERR_ARG;
 457                 else
 458                         devc->edge = i;
 459                 break;
 460         case SR_CONF_BUFFERSIZE:
 461                 i = find_in_array(data, G_VARIANT_TYPE_UINT64,
 462                                   buffersizes, ARRAY_SIZE(buffersizes));
 463                 if (i == -1)
 464                         ret = SR_ERR_ARG;
 465                 else
 466                         devc->last_step = i;
 467                 break;
 468         case SR_CONF_VDIV:
 469                 if (ch == -1) {
 470                         ret = SR_ERR_CHANNEL_GROUP;
 471                 } else if (!g_variant_is_of_type(data, G_VARIANT_TYPE("(tt)"))) {
 472                         ret = SR_ERR_ARG;
 473                 } else {
 474                         g_variant_get(data, "(tt)", &u, &v);
 475                         for (i = 0; i < (int)ARRAY_SIZE(vdivs); i++)
 476                                 if (vdivs[i][0] == u && vdivs[i][1] == v)
 477                                         break;
 478                         if (i == ARRAY_SIZE(vdivs))
 479                                 ret = SR_ERR_ARG;
 480                         else
 481                                 devc->cctl[ch] = (devc->cctl[ch] & 0xCC)
 482                                                | vdivs_map[i];
 483                 }
 484                 break;
 485         case SR_CONF_COUPLING:
 486                 if (ch == -1) {
 487                         ret = SR_ERR_CHANNEL_GROUP;
 488                 } else {
 489                         i = find_in_array(data, G_VARIANT_TYPE_STRING,
 490                                           coupling, ARRAY_SIZE(coupling));
 491                         if (i == -1)
 492                                 ret = SR_ERR_ARG;
 493                         else
 494                                 devc->cctl[ch] = (devc->cctl[ch] & 0xF3)
 495                                                | coupling_map[i];
 496                 }
 497                 break;
 498         case SR_CONF_PROBE_FACTOR:
 499                 if (ch == -1) {
 500                         ret = SR_ERR_CHANNEL_GROUP;
 501                 } else {
 502                         u = g_variant_get_uint64(data);
 503                         if (!u)
 504                                 ret = SR_ERR_ARG;
 505                         else
 506                                 devc->probe[ch] = u;
 507                 }
 508                 break;
 509         default:
 510                 ret = SR_ERR_NA;
 511         }
 512
 513         return ret;
 514 }
 515
 516 static int config_channel_set(const struct sr_dev_inst *sdi,
 517                               struct sr_channel *ch,
 518                               unsigned int changes)
 519 {
 520         struct dev_context *devc = sdi->priv;
 521         uint8_t v;
 522
 523         if (changes & SR_CHANNEL_SET_ENABLED) {
 524                 if (ch->enabled) {
 525                         v = devc->channel | (1 << ch->index);
 526                         if (v & (v - 1))
 527                                 return SR_ERR;
 528                         devc->channel = v;
 529                         devc->enabled_channel->data = ch;
 530                 } else {
 531                         devc->channel &= ~(1 << ch->index);
 532                 }
 533         }
 534         return SR_OK;
 535 }
 536
 537 static int config_commit(const struct sr_dev_inst *sdi)
 538 {
 539         uint8_t state = hung_chang_dso_2100_read_mbox(sdi->conn, 0.02);
 540         int ret;
 541
 542         switch (state) {
 543         case 0x03:
 544         case 0x14:
 545         case 0x21:
 546                 /* we will travel the complete config path on our way to state 1 */
 547                 break;
 548         case 0x00:
 549                 state = 0x01;
 550                 /* Fallthrough */
 551         default:
 552                 ret = hung_chang_dso_2100_move_to(sdi, 1);
 553                 if (ret != SR_OK)
 554                         return ret;
 555                 /* Fallthrough */
 556         case 0x01:
 557                 hung_chang_dso_2100_write_mbox(sdi->conn, 4);
 558         }
 559         ret = hung_chang_dso_2100_move_to(sdi, 1);
 560         if (ret != SR_OK)
 561                 return ret;
 562         return hung_chang_dso_2100_move_to(sdi, state);
 563 }
 564
 565 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 566                 const struct sr_channel_group *cg)
 567 {
 568         GVariantBuilder gvb;
 569         GVariant *gvar, *rational[2];
 570         GSList *l;
 571         int i;
 572
 573         switch (key) {
 574                 case SR_CONF_SCAN_OPTIONS:
 575         case SR_CONF_DEVICE_OPTIONS:
 576                 break;
 577         case SR_CONF_SAMPLERATE:
 578         case SR_CONF_TRIGGER_SOURCE:
 579         case SR_CONF_TRIGGER_SLOPE:
 580         case SR_CONF_BUFFERSIZE:
 581                 if (!sdi || cg)
 582                         return SR_ERR_NA;
 583                 break;
 584         case SR_CONF_VDIV:
 585         case SR_CONF_COUPLING:
 586                 if (!sdi)
 587                         return SR_ERR_NA;
 588                 if (!cg)
 589                         return SR_ERR_CHANNEL_GROUP;
 590                 l = g_slist_find(sdi->channel_groups, cg);
 591                 if (!l)
 592                         return SR_ERR_ARG;
 593                 break;
 594         default:
 595                 return SR_ERR_NA;
 596         }
 597
 598         switch (key) {
 599         case SR_CONF_SCAN_OPTIONS:
 600                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 601                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 602                 break;
 603         case SR_CONF_DEVICE_OPTIONS:
 604                 if (!sdi)
 605                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 606                                         drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
 607                 else if (!cg)
 608                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 609                                         devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 610                 else
 611                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 612                                         cgopts, ARRAY_SIZE(cgopts), sizeof(uint32_t));
 613                 break;
 614         case SR_CONF_SAMPLERATE:
 615                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 616                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
 617                                 samplerates, ARRAY_SIZE(samplerates), sizeof(uint64_t));
 618                 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
 619                 *data = g_variant_builder_end(&gvb);
 620                 break;
 621         case SR_CONF_TRIGGER_SOURCE:
 622                 *data = g_variant_new_strv(trigger_sources, ARRAY_SIZE(trigger_sources));
 623                 break;
 624         case SR_CONF_TRIGGER_SLOPE:
 625                 *data = g_variant_new_strv(trigger_slopes, ARRAY_SIZE(trigger_slopes));
 626                 break;
 627         case SR_CONF_BUFFERSIZE:
 628                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT64,
 629                                 buffersizes, ARRAY_SIZE(buffersizes), sizeof(uint64_t));
 630                 break;
 631         case SR_CONF_VDIV:
 632                 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 633                 for (i = 0; i < (int)ARRAY_SIZE(vdivs); i++) {
 634                         rational[0] = g_variant_new_uint64(vdivs[i][0]);
 635                         rational[1] = g_variant_new_uint64(vdivs[i][1]);
 636                         gvar = g_variant_new_tuple(rational, 2);
 637                         g_variant_builder_add_value(&gvb, gvar);
 638                 }
 639                 *data = g_variant_builder_end(&gvb);
 640                 break;
 641         case SR_CONF_COUPLING:
 642                 *data = g_variant_new_strv(coupling, ARRAY_SIZE(coupling));
 643                 break;
 644         }
 645
 646         return SR_OK;
 647 }
 648
 649 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 650 {
 651         struct dev_context *devc = sdi->priv;
 652         int ret;
 653
 654         if (devc->channel) {
 655                 static const float res_array[] = {0.5, 1, 2, 5};
 656                 static const uint8_t relays[] = {100, 10, 10, 1};
 657                 devc->factor = devc->probe[devc->channel - 1] / 32.0;
 658                 devc->factor *= res_array[devc->cctl[devc->channel - 1] & 0x03];
 659                 devc->factor /= relays[(devc->cctl[devc->channel - 1] >> 4) & 0x03];
 660         }
 661         devc->frame = 0;
 662         devc->state_known = TRUE;
 663         devc->step = 0;
 664         devc->adc2 = FALSE;
 665         devc->retries = MAX_RETRIES;
 666
 667         ret = hung_chang_dso_2100_move_to(sdi, 0x21);
 668         if (ret != SR_OK)
 669                 return ret;
 670
 671         std_session_send_df_header(sdi);
 672
 673         sr_session_source_add(sdi->session, -1, 0, 8,
 674                               hung_chang_dso_2100_poll, (void *)sdi);
 675
 676         return SR_OK;
 677 }
 678
 679 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 680 {
 681         std_session_send_df_end(sdi);
 682         sr_session_source_remove(sdi->session, -1);
 683         hung_chang_dso_2100_move_to(sdi, 1);
 684
 685         return SR_OK;
 686 }
 687
 688 static struct sr_dev_driver hung_chang_dso_2100_driver_info = {
 689         .name = "hung-chang-dso-2100",
 690         .longname = "Hung-Chang DSO-2100",
 691         .api_version = 1,
 692         .init = std_init,
 693         .cleanup = std_cleanup,
 694         .scan = scan,
 695         .dev_list = std_dev_list,
 696         .dev_clear = dev_clear,
 697         .config_get = config_get,
 698         .config_set = config_set,
 699         .config_channel_set = config_channel_set,
 700         .config_commit = config_commit,
 701         .config_list = config_list,
 702         .dev_open = dev_open,
 703         .dev_close = dev_close,
 704         .dev_acquisition_start = dev_acquisition_start,
 705         .dev_acquisition_stop = dev_acquisition_stop,
 706         .context = NULL,
 707 };
 708 SR_REGISTER_DEV_DRIVER(hung_chang_dso_2100_driver_info);