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 SR_PRIV struct sr_dev_driver hung_chang_dso_2100_driver_info;
  26
  27 static const uint32_t scanopts[] = {
  28         SR_CONF_CONN,
  29 };
  30
  31 static const uint32_t drvopts[] = {
  32         SR_CONF_OSCILLOSCOPE,
  33 };
  34
  35 static const uint32_t devopts[] = {
  36         SR_CONF_CONN | SR_CONF_GET,
  37         SR_CONF_LIMIT_FRAMES | SR_CONF_GET | SR_CONF_SET,
  38         SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  39         SR_CONF_TRIGGER_SOURCE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  40         SR_CONF_TRIGGER_SLOPE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  41         SR_CONF_BUFFERSIZE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  42 };
  43
  44 static const uint32_t cgopts[] = {
  45         SR_CONF_VDIV | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  46         SR_CONF_COUPLING | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  47         SR_CONF_PROBE_FACTOR | SR_CONF_GET | SR_CONF_SET,
  48 };
  49
  50 static const uint64_t samplerates[] = {
  51         SR_MHZ(100), SR_MHZ(50),  SR_MHZ(25),   SR_MHZ(20),
  52         SR_MHZ(10),  SR_MHZ(5),   SR_KHZ(2500), SR_MHZ(2),
  53         SR_MHZ(1),   SR_KHZ(500), SR_KHZ(250),  SR_KHZ(200),
  54         SR_KHZ(100), SR_KHZ(50),  SR_KHZ(25),   SR_KHZ(20),
  55         SR_KHZ(10),  SR_KHZ(5),   SR_HZ(2500),  SR_KHZ(2),
  56         SR_KHZ(1),   SR_HZ(500),  SR_HZ(250),   SR_HZ(200),
  57         SR_HZ(100),  SR_HZ(50),   SR_HZ(25),    SR_HZ(20)
  58 };
  59
  60 /* must be in sync with readout_steps[] in protocol.c */
  61 static const uint64_t buffersizes[] = {
  62         2 * 500, 3 * 500, 4 * 500, 5 * 500,
  63         6 * 500, 7 * 500, 8 * 500, 9 * 500, 10 * 500,
  64         12 * 500 - 2, 14 * 500 - 2, 16 * 500 - 2,
  65         18 * 500 - 2, 20 * 500 - 2, 10240 - 2
  66 };
  67
  68 static const uint64_t vdivs[][2] = {
  69         { 10, 1000 },
  70         { 20, 1000 },
  71         { 50, 1000 },
  72         { 100, 1000 },
  73         { 200, 1000 },
  74         { 500, 1000 },
  75         { 1, 1 },
  76         { 2, 1 },
  77         { 5, 1 },
  78 };
  79
  80 /* Bits 4 and 5 enable relays that add /10 filters to the chain
  81  * Bits 0 and 1 select an output from a resistor array */
  82 static const uint8_t vdivs_map[] = {
  83         0x01, 0x02, 0x03, 0x21, 0x22, 0x23, 0x31, 0x32, 0x33
  84 };
  85
  86
  87 static const char *trigger_sources[] = {
  88         "A", "B", "EXT"
  89 };
  90
  91 static const uint8_t trigger_sources_map[] = {
  92         0x00, 0x80, 0x40
  93 };
  94
  95 static const char *trigger_slopes[] = {
  96         "f", "r"
  97 };
  98
  99 static const char *coupling[] = {
 100         "DC", "AC", "GND"
 101 };
 102
 103 static const uint8_t coupling_map[] = {
 104         0x00, 0x08, 0x04
 105 };
 106
 107 static GSList *scan_port(GSList *devices, struct sr_dev_driver *di,
 108                          struct parport *port)
 109 {
 110         struct sr_dev_inst *sdi;
 111         struct sr_channel *ch;
 112         struct sr_channel_group *cg;
 113         struct dev_context *devc;
 114         struct drv_context *drvc;
 115         int i;
 116
 117         if (ieee1284_open(port, 0, &i) != E1284_OK) {
 118                 sr_err("Can't open parallel port %s", port->name);
 119                 goto fail1;
 120         }
 121
 122         if ((i & (CAP1284_RAW | CAP1284_BYTE)) != (CAP1284_RAW | CAP1284_BYTE)) {
 123                 sr_err("Parallel port %s does not provide low-level bidirection access",
 124                        port->name);
 125                 goto fail2;
 126         }
 127
 128         if (ieee1284_claim(port) != E1284_OK) {
 129                 sr_err("Parallel port %s already in use", port->name);
 130                 goto fail2;
 131         }
 132
 133         if (!hung_chang_dso_2100_check_id(port))
 134                 goto fail3;
 135
 136         sdi = g_malloc0(sizeof(struct sr_dev_inst));
 137         sdi->status = SR_ST_INACTIVE;
 138         sdi->vendor = g_strdup("Hung-Chang");
 139         sdi->model = g_strdup("DSO-2100");
 140         sdi->driver = di;
 141         drvc = di->context;
 142         sdi->inst_type = 0; /* FIXME */
 143         sdi->conn = port;
 144         ieee1284_ref(port);
 145
 146         for (i = 0; i < NUM_CHANNELS; i++) {
 147                 cg = g_malloc0(sizeof(struct sr_channel_group));
 148                 cg->name = g_strdup(trigger_sources[i]);
 149                 ch = sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, FALSE, trigger_sources[i]);
 150                 cg->channels = g_slist_append(cg->channels, ch);
 151                 sdi->channel_groups = g_slist_append(sdi->channel_groups, cg);
 152         }
 153
 154         devc = g_malloc0(sizeof(struct dev_context));
 155         devc->enabled_channel = g_slist_append(NULL, NULL);
 156         devc->channel = 0;
 157         devc->rate = 0;
 158         devc->probe[0] = 10;
 159         devc->probe[1] = 10;
 160         devc->cctl[0] = 0x31; /* 1V/div, DC coupling, trigger on channel A*/
 161         devc->cctl[1] = 0x31; /* 1V/div, DC coupling, no tv sync trigger */
 162         devc->edge = 0;
 163         devc->tlevel = 0x80;
 164         devc->pos[0] = 0x80;
 165         devc->pos[1] = 0x80;
 166         devc->offset[0] = 0x80;
 167         devc->offset[1] = 0x80;
 168         devc->gain[0] = 0x80;
 169         devc->gain[1] = 0x80;
 170         devc->frame_limit = 0;
 171         devc->last_step = 0; /* buffersize = 1000 */
 172         sdi->priv = devc;
 173
 174         drvc->instances = g_slist_append(drvc->instances, sdi);
 175         devices = g_slist_append(devices, sdi);
 176
 177 fail3:
 178         ieee1284_release(port);
 179 fail2:
 180         ieee1284_close(port);
 181 fail1:
 182         return devices;
 183 }
 184
 185 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 186 {
 187         struct parport_list ports;
 188         struct sr_config *src;
 189         const char *conn = NULL;
 190         GSList *devices, *option;
 191         gboolean port_found;
 192         int i;
 193
 194
 195         for (option = options; option; option = option->next) {
 196                 src = option->data;
 197                 if (src->key == SR_CONF_CONN) {
 198                         conn = g_variant_get_string(src->data, NULL);
 199                         break;
 200                 }
 201         }
 202
 203         if (!conn)
 204                 return NULL;
 205
 206         if (ieee1284_find_ports(&ports, 0) != E1284_OK)
 207                 return NULL;
 208
 209         devices = NULL;
 210         port_found = FALSE;
 211         for (i = 0; i < ports.portc; i++)
 212                 if (!strcmp(ports.portv[i]->name, conn)) {
 213                         port_found = TRUE;
 214                         devices = scan_port(devices, di, ports.portv[i]);
 215                 }
 216
 217         if (!port_found) {
 218                 sr_err("Parallel port %s not found. Valid names are:", conn);
 219                 for (i = 0; i < ports.portc; i++)
 220                         sr_err("\t%s", ports.portv[i]->name);
 221         }
 222
 223         ieee1284_free_ports(&ports);
 224
 225         return devices;
 226 }
 227
 228 static void clear_private(void *priv)
 229 {
 230         struct dev_context *devc = priv;
 231
 232         g_slist_free(devc->enabled_channel);
 233 }
 234
 235 static int dev_clear(const struct sr_dev_driver *di)
 236 {
 237         struct drv_context *drvc = di->context;
 238         struct sr_dev_inst *sdi;
 239         GSList *l;
 240
 241         if (drvc) {
 242                 for (l = drvc->instances; l; l = l->next) {
 243                         sdi = l->data;
 244                         ieee1284_unref(sdi->conn);
 245                 }
 246         }
 247
 248         return std_dev_clear(di, clear_private);
 249 }
 250
 251 static int dev_open(struct sr_dev_inst *sdi)
 252 {
 253         struct dev_context *devc = sdi->priv;
 254         int i;
 255
 256         if (sdi->status != SR_ST_INACTIVE)
 257                 goto fail1;
 258
 259         if (ieee1284_open(sdi->conn, 0, &i) != E1284_OK)
 260                 goto fail1;
 261
 262         if (ieee1284_claim(sdi->conn) != E1284_OK)
 263                 goto fail2;
 264
 265         if (ieee1284_data_dir(sdi->conn, 1) != E1284_OK)
 266                 goto fail3;
 267
 268         if (hung_chang_dso_2100_move_to(sdi, 1))
 269                 goto fail3;
 270
 271         devc->samples = g_try_malloc(1000 * sizeof(*devc->samples));
 272         if (!devc->samples)
 273                 goto fail3;
 274
 275         sdi->status = SR_ST_ACTIVE;
 276
 277         return SR_OK;
 278
 279 fail3:
 280         hung_chang_dso_2100_reset_port(sdi->conn);
 281         ieee1284_release(sdi->conn);
 282 fail2:
 283         ieee1284_close(sdi->conn);
 284 fail1:
 285         return SR_ERR;
 286 }
 287
 288 static int dev_close(struct sr_dev_inst *sdi)
 289 {
 290         struct dev_context *devc = sdi->priv;
 291
 292         if (sdi->status != SR_ST_ACTIVE)
 293                 return SR_OK;
 294
 295         g_free(devc->samples);
 296         hung_chang_dso_2100_reset_port(sdi->conn);
 297         ieee1284_release(sdi->conn);
 298         ieee1284_close(sdi->conn);
 299         sdi->status = SR_ST_INACTIVE;
 300
 301         return SR_OK;
 302 }
 303
 304 static int find_in_array(GVariant *data, const GVariantType *type,
 305                          const void *arr, int n)
 306 {
 307         const char * const *sarr;
 308         const char *s;
 309         const uint64_t *u64arr;
 310         const uint8_t *u8arr;
 311         uint64_t u64;
 312         uint8_t u8;
 313         int i;
 314
 315         if (!g_variant_is_of_type(data, type))
 316                 return -1;
 317
 318         switch (g_variant_classify(data)) {
 319         case G_VARIANT_CLASS_STRING:
 320                 s = g_variant_get_string(data, NULL);
 321                 sarr = arr;
 322
 323                 for (i = 0; i < n; i++)
 324                         if (!strcmp(s, sarr[i]))
 325                                 return i;
 326                 break;
 327         case G_VARIANT_CLASS_UINT64:
 328                 u64 = g_variant_get_uint64(data);
 329                 u64arr = arr;
 330
 331                 for (i = 0; i < n; i++)
 332                         if (u64 == u64arr[i])
 333                                 return i;
 334                 break;
 335         case G_VARIANT_CLASS_BYTE:
 336                 u8 = g_variant_get_byte(data);
 337                 u8arr = arr;
 338
 339                 for (i = 0; i < n; i++)
 340                         if (u8 == u8arr[i])
 341                                 return i;
 342         default:
 343                 break;
 344         }
 345
 346         return -1;
 347 }
 348
 349 static int reverse_map(uint8_t u, const uint8_t *arr, int n)
 350 {
 351         GVariant *v = g_variant_new_byte(u);
 352         int i = find_in_array(v, G_VARIANT_TYPE_BYTE, arr, n);
 353         g_variant_unref(v);
 354         return i;
 355 }
 356
 357 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 358                 const struct sr_channel_group *cg)
 359 {
 360         struct dev_context *devc = sdi->priv;
 361         struct parport *port;
 362         int ret, i, ch = -1;
 363
 364         if (cg) /* sr_config_get will validate cg using config_list */
 365                 ch = ((struct sr_channel *)cg->channels->data)->index;
 366
 367         ret = SR_OK;
 368         switch (key) {
 369         case SR_CONF_CONN:
 370                 port = sdi->conn;
 371                 *data = g_variant_new_string(port->name);
 372                 break;
 373         case SR_CONF_LIMIT_FRAMES:
 374                 *data = g_variant_new_uint64(devc->frame_limit);
 375                 break;
 376         case SR_CONF_SAMPLERATE:
 377                 *data = g_variant_new_uint64(samplerates[devc->rate]);
 378                 break;
 379         case SR_CONF_TRIGGER_SOURCE:
 380                 i = reverse_map(devc->cctl[0] & 0xC0, trigger_sources_map,
 381                                 ARRAY_SIZE(trigger_sources_map));
 382                 if (i == -1)
 383                         ret = SR_ERR;
 384                 else
 385                         *data = g_variant_new_string(trigger_sources[i]);
 386                 break;
 387         case SR_CONF_TRIGGER_SLOPE:
 388                 if (devc->edge >= ARRAY_SIZE(trigger_slopes))
 389                         ret = SR_ERR;
 390                 else
 391                         *data = g_variant_new_string(trigger_slopes[devc->edge]);
 392                 break;
 393         case SR_CONF_BUFFERSIZE:
 394                 *data = g_variant_new_uint64(buffersizes[devc->last_step]);
 395                 break;
 396         case SR_CONF_VDIV:
 397                 if (ch == -1) {
 398                         ret = SR_ERR_CHANNEL_GROUP;
 399                 } else {
 400                         i = reverse_map(devc->cctl[ch] & 0x33, vdivs_map,
 401                                         ARRAY_SIZE(vdivs_map));
 402                         if (i == -1)
 403                                 ret = SR_ERR;
 404                         else
 405                                 *data = g_variant_new("(tt)", vdivs[i][0],
 406                                                       vdivs[i][1]);
 407                 }
 408                 break;
 409         case SR_CONF_COUPLING:
 410                 if (ch == -1) {
 411                         ret = SR_ERR_CHANNEL_GROUP;
 412                 } else {
 413                         i = reverse_map(devc->cctl[ch] & 0x0C, coupling_map,
 414                                         ARRAY_SIZE(coupling_map));
 415                         if (i == -1)
 416                                 ret = SR_ERR;
 417                         else
 418                                 *data = g_variant_new_string(coupling[i]);
 419                 }
 420                 break;
 421         case SR_CONF_PROBE_FACTOR:
 422                 if (ch == -1)
 423                         ret = SR_ERR_CHANNEL_GROUP;
 424                 else
 425                         *data = g_variant_new_uint64(devc->probe[ch]);
 426                 break;
 427         default:
 428                 ret = SR_ERR_NA;
 429         }
 430
 431         return ret;
 432 }
 433
 434 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 435                 const struct sr_channel_group *cg)
 436 {
 437         struct dev_context *devc = sdi->priv;
 438         int ret, i, ch = -1;
 439         uint64_t u, v;
 440
 441         if (cg) /* sr_config_set will validate cg using config_list */
 442                 ch = ((struct sr_channel *)cg->channels->data)->index;
 443
 444         if (sdi->status != SR_ST_ACTIVE)
 445                 return SR_ERR_DEV_CLOSED;
 446
 447         ret = SR_OK;
 448         switch (key) {
 449         case SR_CONF_LIMIT_FRAMES:
 450                 devc->frame_limit = g_variant_get_uint64(data);
 451                 break;
 452         case SR_CONF_SAMPLERATE:
 453                 i = find_in_array(data, G_VARIANT_TYPE_UINT64,
 454                                   samplerates, ARRAY_SIZE(samplerates));
 455                 if (i == -1)
 456                         ret = SR_ERR_ARG;
 457                 else
 458                         devc->rate = i;
 459                 break;
 460         case SR_CONF_TRIGGER_SOURCE:
 461                 i = find_in_array(data, G_VARIANT_TYPE_STRING,
 462                                   trigger_sources, ARRAY_SIZE(trigger_sources));
 463                 if (i == -1)
 464                         ret = SR_ERR_ARG;
 465                 else
 466                         devc->cctl[0] = (devc->cctl[0] & 0x3F)
 467                                       | trigger_sources_map[i];
 468                 break;
 469         case SR_CONF_TRIGGER_SLOPE:
 470                 i = find_in_array(data, G_VARIANT_TYPE_STRING,
 471                                   trigger_slopes, ARRAY_SIZE(trigger_slopes));
 472                 if (i == -1)
 473                         ret = SR_ERR_ARG;
 474                 else
 475                         devc->edge = i;
 476                 break;
 477         case SR_CONF_BUFFERSIZE:
 478                 i = find_in_array(data, G_VARIANT_TYPE_UINT64,
 479                                   buffersizes, ARRAY_SIZE(buffersizes));
 480                 if (i == -1)
 481                         ret = SR_ERR_ARG;
 482                 else
 483                         devc->last_step = i;
 484                 break;
 485         case SR_CONF_VDIV:
 486                 if (ch == -1) {
 487                         ret = SR_ERR_CHANNEL_GROUP;
 488                 } else if (!g_variant_is_of_type(data, G_VARIANT_TYPE("(tt)"))) {
 489                         ret = SR_ERR_ARG;
 490                 } else {
 491                         g_variant_get(data, "(tt)", &u, &v);
 492                         for (i = 0; i < (int)ARRAY_SIZE(vdivs); i++)
 493                                 if (vdivs[i][0] == u && vdivs[i][1] == v)
 494                                         break;
 495                         if (i == ARRAY_SIZE(vdivs))
 496                                 ret = SR_ERR_ARG;
 497                         else
 498                                 devc->cctl[ch] = (devc->cctl[ch] & 0xCC)
 499                                                | vdivs_map[i];
 500                 }
 501                 break;
 502         case SR_CONF_COUPLING:
 503                 if (ch == -1) {
 504                         ret = SR_ERR_CHANNEL_GROUP;
 505                 } else {
 506                         i = find_in_array(data, G_VARIANT_TYPE_STRING,
 507                                           coupling, ARRAY_SIZE(coupling));
 508                         if (i == -1)
 509                                 ret = SR_ERR_ARG;
 510                         else
 511                                 devc->cctl[ch] = (devc->cctl[ch] & 0xF3)
 512                                                | coupling_map[i];
 513                 }
 514                 break;
 515         case SR_CONF_PROBE_FACTOR:
 516                 if (ch == -1) {
 517                         ret = SR_ERR_CHANNEL_GROUP;
 518                 } else {
 519                         u = g_variant_get_uint64(data);
 520                         if (!u)
 521                                 ret = SR_ERR_ARG;
 522                         else
 523                                 devc->probe[ch] = u;
 524                 }
 525                 break;
 526         default:
 527                 ret = SR_ERR_NA;
 528         }
 529
 530         return ret;
 531 }
 532
 533 static int config_channel_set(const struct sr_dev_inst *sdi,
 534                               struct sr_channel *ch,
 535                               unsigned int changes)
 536 {
 537         struct dev_context *devc = sdi->priv;
 538         uint8_t v;
 539
 540         if (changes & SR_CHANNEL_SET_ENABLED) {
 541                 if (ch->enabled) {
 542                         v = devc->channel | (1 << ch->index);
 543                         if (v & (v - 1))
 544                                 return SR_ERR;
 545                         devc->channel = v;
 546                         devc->enabled_channel->data = ch;
 547                 } else {
 548                         devc->channel &= ~(1 << ch->index);
 549                 }
 550         }
 551         return SR_OK;
 552 }
 553
 554 static int config_commit(const struct sr_dev_inst *sdi)
 555 {
 556         uint8_t state = hung_chang_dso_2100_read_mbox(sdi->conn, 0.02);
 557         int ret;
 558
 559         if (sdi->status != SR_ST_ACTIVE)
 560                 return SR_ERR_DEV_CLOSED;
 561
 562         switch (state) {
 563         case 0x03:
 564         case 0x14:
 565         case 0x21:
 566                 /* we will travel the complete config path on our way to state 1 */
 567                 break;
 568         case 0x00:
 569                 state = 0x01;
 570         default:
 571                 ret = hung_chang_dso_2100_move_to(sdi, 1);
 572                 if (ret != SR_OK)
 573                         return ret;
 574         case 0x01:
 575                 hung_chang_dso_2100_write_mbox(sdi->conn, 4);
 576         }
 577         ret = hung_chang_dso_2100_move_to(sdi, 1);
 578         if (ret != SR_OK)
 579                 return ret;
 580         return hung_chang_dso_2100_move_to(sdi, state);
 581 }
 582
 583 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 584                 const struct sr_channel_group *cg)
 585 {
 586         GVariantBuilder gvb;
 587         GVariant *gvar, *rational[2];
 588         GSList *l;
 589         int i;
 590
 591         switch (key) {
 592                 case SR_CONF_SCAN_OPTIONS:
 593         case SR_CONF_DEVICE_OPTIONS:
 594                 break;
 595         case SR_CONF_SAMPLERATE:
 596         case SR_CONF_TRIGGER_SOURCE:
 597         case SR_CONF_TRIGGER_SLOPE:
 598         case SR_CONF_BUFFERSIZE:
 599                 if (!sdi || cg)
 600                         return SR_ERR_NA;
 601                 break;
 602         case SR_CONF_VDIV:
 603         case SR_CONF_COUPLING:
 604                 if (!sdi)
 605                         return SR_ERR_NA;
 606                 if (!cg)
 607                         return SR_ERR_CHANNEL_GROUP;
 608                 l = g_slist_find(sdi->channel_groups, cg);
 609                 if (!l)
 610                         return SR_ERR_ARG;
 611                 break;
 612         default:
 613                 return SR_ERR_NA;
 614         }
 615
 616         switch (key) {
 617         case SR_CONF_SCAN_OPTIONS:
 618                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 619                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 620                 break;
 621         case SR_CONF_DEVICE_OPTIONS:
 622                 if (!sdi)
 623                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 624                                         drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
 625                 else if (!cg)
 626                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 627                                         devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 628                 else
 629                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 630                                         cgopts, ARRAY_SIZE(cgopts), sizeof(uint32_t));
 631                 break;
 632         case SR_CONF_SAMPLERATE:
 633                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 634                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
 635                                 samplerates, ARRAY_SIZE(samplerates), sizeof(uint64_t));
 636                 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
 637                 *data = g_variant_builder_end(&gvb);
 638                 break;
 639         case SR_CONF_TRIGGER_SOURCE:
 640                 *data = g_variant_new_strv(trigger_sources, ARRAY_SIZE(trigger_sources));
 641                 break;
 642         case SR_CONF_TRIGGER_SLOPE:
 643                 *data = g_variant_new_strv(trigger_slopes, ARRAY_SIZE(trigger_slopes));
 644                 break;
 645         case SR_CONF_BUFFERSIZE:
 646                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT64,
 647                                 buffersizes, ARRAY_SIZE(buffersizes), sizeof(uint64_t));
 648                 break;
 649         case SR_CONF_VDIV:
 650                 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 651                 for (i = 0; i < (int)ARRAY_SIZE(vdivs); i++) {
 652                         rational[0] = g_variant_new_uint64(vdivs[i][0]);
 653                         rational[1] = g_variant_new_uint64(vdivs[i][1]);
 654                         gvar = g_variant_new_tuple(rational, 2);
 655                         g_variant_builder_add_value(&gvb, gvar);
 656                 }
 657                 *data = g_variant_builder_end(&gvb);
 658                 break;
 659         case SR_CONF_COUPLING:
 660                 *data = g_variant_new_strv(coupling, ARRAY_SIZE(coupling));
 661                 break;
 662         }
 663
 664         return SR_OK;
 665 }
 666
 667 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 668 {
 669         struct dev_context *devc = sdi->priv;
 670         int ret;
 671
 672         if (sdi->status != SR_ST_ACTIVE)
 673                 return SR_ERR_DEV_CLOSED;
 674
 675         if (devc->channel) {
 676                 static const float res_array[] = {0.5, 1, 2, 5};
 677                 static const uint8_t relays[] = {100, 10, 10, 1};
 678                 devc->factor = devc->probe[devc->channel - 1] / 32.0;
 679                 devc->factor *= res_array[devc->cctl[devc->channel - 1] & 0x03];
 680                 devc->factor /= relays[(devc->cctl[devc->channel - 1] >> 4) & 0x03];
 681         }
 682         devc->frame = 0;
 683         devc->state_known = TRUE;
 684         devc->step = 0;
 685         devc->adc2 = FALSE;
 686         devc->retries = MAX_RETRIES;
 687
 688         ret = hung_chang_dso_2100_move_to(sdi, 0x21);
 689         if (ret != SR_OK)
 690                 return ret;
 691
 692         std_session_send_df_header(sdi, LOG_PREFIX);
 693
 694         sr_session_source_add(sdi->session, -1, 0, 8,
 695                               hung_chang_dso_2100_poll, (void *)sdi);
 696
 697         return SR_OK;
 698 }
 699
 700 SR_PRIV int hung_chang_dso_2100_dev_acquisition_stop(const struct sr_dev_inst *sdi)
 701 {
 702         if (sdi->status != SR_ST_ACTIVE)
 703                 return SR_ERR_DEV_CLOSED;
 704
 705         std_session_send_df_end(sdi, LOG_PREFIX);
 706         sr_session_source_remove(sdi->session, -1);
 707         hung_chang_dso_2100_move_to(sdi, 1);
 708
 709         return SR_OK;
 710 }
 711
 712 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 713 {
 714         return hung_chang_dso_2100_dev_acquisition_stop(sdi);
 715 }
 716
 717 SR_PRIV struct sr_dev_driver hung_chang_dso_2100_driver_info = {
 718         .name = "hung-chang-dso-2100",
 719         .longname = "Hung-Chang DSO-2100",
 720         .api_version = 1,
 721         .init = std_init,
 722         .cleanup = std_cleanup,
 723         .scan = scan,
 724         .dev_list = std_dev_list,
 725         .dev_clear = dev_clear,
 726         .config_get = config_get,
 727         .config_set = config_set,
 728         .config_channel_set = config_channel_set,
 729         .config_commit = config_commit,
 730         .config_list = config_list,
 731         .dev_open = dev_open,
 732         .dev_close = dev_close,
 733         .dev_acquisition_start = dev_acquisition_start,
 734         .dev_acquisition_stop = dev_acquisition_stop,
 735         .context = NULL,
 736 };