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 int init(struct sr_dev_driver *di, struct sr_context *sr_ctx)
 108 {
 109         return std_init(sr_ctx, di, LOG_PREFIX);
 110 }
 111
 112 static GSList *scan_port(GSList *devices, struct sr_dev_driver *di,
 113                          struct parport *port)
 114 {
 115         struct sr_dev_inst *sdi;
 116         struct sr_channel *ch;
 117         struct sr_channel_group *cg;
 118         struct dev_context *devc;
 119         struct drv_context *drvc;
 120         int i;
 121
 122         if (ieee1284_open(port, 0, &i) != E1284_OK) {
 123                 sr_err("Can't open parallel port %s", port->name);
 124                 goto fail1;
 125         }
 126
 127         if ((i & (CAP1284_RAW | CAP1284_BYTE)) != (CAP1284_RAW | CAP1284_BYTE)) {
 128                 sr_err("Parallel port %s does not provide low-level bidirection access",
 129                        port->name);
 130                 goto fail2;
 131         }
 132
 133         if (ieee1284_claim(port) != E1284_OK) {
 134                 sr_err("Parallel port %s already in use", port->name);
 135                 goto fail2;
 136         }
 137
 138         if (!hung_chang_dso_2100_check_id(port))
 139                 goto fail3;
 140
 141         sdi = g_malloc0(sizeof(struct sr_dev_inst));
 142         sdi->status = SR_ST_INACTIVE;
 143         sdi->vendor = g_strdup("Hung-Chang");
 144         sdi->model = g_strdup("DSO-2100");
 145         sdi->driver = di;
 146         drvc = di->context;
 147         sdi->inst_type = 0; /* FIXME */
 148         sdi->conn = port;
 149         ieee1284_ref(port);
 150
 151         for (i = 0; i < NUM_CHANNELS; i++) {
 152                 cg = g_malloc0(sizeof(struct sr_channel_group));
 153                 cg->name = g_strdup(trigger_sources[i]);
 154                 ch = sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, FALSE, trigger_sources[i]);
 155                 cg->channels = g_slist_append(cg->channels, ch);
 156                 sdi->channel_groups = g_slist_append(sdi->channel_groups, cg);
 157         }
 158
 159         devc = g_malloc0(sizeof(struct dev_context));
 160         devc->enabled_channel = g_slist_append(NULL, NULL);
 161         devc->channel = 0;
 162         devc->rate = 0;
 163         devc->probe[0] = 10;
 164         devc->probe[1] = 10;
 165         devc->cctl[0] = 0x31; /* 1V/div, DC coupling, trigger on channel A*/
 166         devc->cctl[1] = 0x31; /* 1V/div, DC coupling, no tv sync trigger */
 167         devc->edge = 0;
 168         devc->tlevel = 0x80;
 169         devc->pos[0] = 0x80;
 170         devc->pos[1] = 0x80;
 171         devc->offset[0] = 0x80;
 172         devc->offset[1] = 0x80;
 173         devc->gain[0] = 0x80;
 174         devc->gain[1] = 0x80;
 175         devc->frame_limit = 0;
 176         devc->last_step = 0; /* buffersize = 1000 */
 177         sdi->priv = devc;
 178
 179         drvc->instances = g_slist_append(drvc->instances, sdi);
 180         devices = g_slist_append(devices, sdi);
 181
 182 fail3:
 183         ieee1284_release(port);
 184 fail2:
 185         ieee1284_close(port);
 186 fail1:
 187         return devices;
 188 }
 189
 190 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 191 {
 192         struct parport_list ports;
 193         struct sr_config *src;
 194         const char *conn = NULL;
 195         GSList *devices, *option;
 196         gboolean port_found;
 197         int i;
 198
 199
 200         for (option = options; option; option = option->next) {
 201                 src = option->data;
 202                 if (src->key == SR_CONF_CONN) {
 203                         conn = g_variant_get_string(src->data, NULL);
 204                         break;
 205                 }
 206         }
 207
 208         if (!conn)
 209                 return NULL;
 210
 211         if (ieee1284_find_ports(&ports, 0) != E1284_OK)
 212                 return NULL;
 213
 214         devices = NULL;
 215         port_found = FALSE;
 216         for (i = 0; i < ports.portc; i++)
 217                 if (!strcmp(ports.portv[i]->name, conn)) {
 218                         port_found = TRUE;
 219                         devices = scan_port(devices, di, ports.portv[i]);
 220                 }
 221
 222         if (!port_found) {
 223                 sr_err("Parallel port %s not found. Valid names are:", conn);
 224                 for (i = 0; i < ports.portc; i++)
 225                         sr_err("\t%s", ports.portv[i]->name);
 226         }
 227
 228         ieee1284_free_ports(&ports);
 229
 230         return devices;
 231 }
 232
 233 static GSList *dev_list(const struct sr_dev_driver *di)
 234 {
 235         return ((struct drv_context *)(di->context))->instances;
 236 }
 237
 238 static void clear_private(void *priv)
 239 {
 240         struct dev_context *devc = priv;
 241
 242         g_slist_free(devc->enabled_channel);
 243 }
 244
 245 static int dev_clear(const struct sr_dev_driver *di)
 246 {
 247         struct drv_context *drvc = di->context;
 248         struct sr_dev_inst *sdi;
 249         GSList *l;
 250
 251         if (drvc) {
 252                 for (l = drvc->instances; l; l = l->next) {
 253                         sdi = l->data;
 254                         ieee1284_unref(sdi->conn);
 255                 }
 256         }
 257
 258         return std_dev_clear(di, clear_private);
 259 }
 260
 261 static int dev_open(struct sr_dev_inst *sdi)
 262 {
 263         struct dev_context *devc = sdi->priv;
 264         int i;
 265
 266         if (sdi->status != SR_ST_INACTIVE)
 267                 goto fail1;
 268
 269         if (ieee1284_open(sdi->conn, 0, &i) != E1284_OK)
 270                 goto fail1;
 271
 272         if (ieee1284_claim(sdi->conn) != E1284_OK)
 273                 goto fail2;
 274
 275         if (ieee1284_data_dir(sdi->conn, 1) != E1284_OK)
 276                 goto fail3;
 277
 278         if (hung_chang_dso_2100_move_to(sdi, 1))
 279                 goto fail3;
 280
 281         devc->samples = g_try_malloc(1000 * sizeof(*devc->samples));
 282         if (!devc->samples)
 283                 goto fail3;
 284
 285         sdi->status = SR_ST_ACTIVE;
 286
 287         return SR_OK;
 288
 289 fail3:
 290         hung_chang_dso_2100_reset_port(sdi->conn);
 291         ieee1284_release(sdi->conn);
 292 fail2:
 293         ieee1284_close(sdi->conn);
 294 fail1:
 295         return SR_ERR;
 296 }
 297
 298 static int dev_close(struct sr_dev_inst *sdi)
 299 {
 300         struct dev_context *devc = sdi->priv;
 301
 302         if (sdi->status != SR_ST_ACTIVE)
 303                 return SR_OK;
 304
 305         g_free(devc->samples);
 306         hung_chang_dso_2100_reset_port(sdi->conn);
 307         ieee1284_release(sdi->conn);
 308         ieee1284_close(sdi->conn);
 309         sdi->status = SR_ST_INACTIVE;
 310
 311         return SR_OK;
 312 }
 313
 314 static int find_in_array(GVariant *data, const GVariantType *type,
 315                          const void *arr, int n)
 316 {
 317         const char * const *sarr;
 318         const char *s;
 319         const uint64_t *u64arr;
 320         const uint8_t *u8arr;
 321         uint64_t u64;
 322         uint8_t u8;
 323         int i;
 324
 325         if (!g_variant_is_of_type(data, type))
 326                 return -1;
 327
 328         switch (g_variant_classify(data)) {
 329         case G_VARIANT_CLASS_STRING:
 330                 s = g_variant_get_string(data, NULL);
 331                 sarr = arr;
 332
 333                 for (i = 0; i < n; i++)
 334                         if (!strcmp(s, sarr[i]))
 335                                 return i;
 336                 break;
 337         case G_VARIANT_CLASS_UINT64:
 338                 u64 = g_variant_get_uint64(data);
 339                 u64arr = arr;
 340
 341                 for (i = 0; i < n; i++)
 342                         if (u64 == u64arr[i])
 343                                 return i;
 344                 break;
 345         case G_VARIANT_CLASS_BYTE:
 346                 u8 = g_variant_get_byte(data);
 347                 u8arr = arr;
 348
 349                 for (i = 0; i < n; i++)
 350                         if (u8 == u8arr[i])
 351                                 return i;
 352         default:
 353                 break;
 354         }
 355
 356         return -1;
 357 }
 358
 359 static int reverse_map(uint8_t u, const uint8_t *arr, int n)
 360 {
 361         GVariant *v = g_variant_new_byte(u);
 362         int i = find_in_array(v, G_VARIANT_TYPE_BYTE, arr, n);
 363         g_variant_unref(v);
 364         return i;
 365 }
 366
 367 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 368                 const struct sr_channel_group *cg)
 369 {
 370         struct dev_context *devc = sdi->priv;
 371         struct parport *port;
 372         int ret, i, ch = -1;
 373
 374         if (cg) /* sr_config_get will validate cg using config_list */
 375                 ch = ((struct sr_channel *)cg->channels->data)->index;
 376
 377         ret = SR_OK;
 378         switch (key) {
 379         case SR_CONF_CONN:
 380                 port = sdi->conn;
 381                 *data = g_variant_new_string(port->name);
 382                 break;
 383         case SR_CONF_LIMIT_FRAMES:
 384                 *data = g_variant_new_uint64(devc->frame_limit);
 385                 break;
 386         case SR_CONF_SAMPLERATE:
 387                 *data = g_variant_new_uint64(samplerates[devc->rate]);
 388                 break;
 389         case SR_CONF_TRIGGER_SOURCE:
 390                 i = reverse_map(devc->cctl[0] & 0xC0, trigger_sources_map,
 391                                 ARRAY_SIZE(trigger_sources_map));
 392                 if (i == -1)
 393                         ret = SR_ERR;
 394                 else
 395                         *data = g_variant_new_string(trigger_sources[i]);
 396                 break;
 397         case SR_CONF_TRIGGER_SLOPE:
 398                 if (devc->edge >= ARRAY_SIZE(trigger_slopes))
 399                         ret = SR_ERR;
 400                 else
 401                         *data = g_variant_new_string(trigger_slopes[devc->edge]);
 402                 break;
 403         case SR_CONF_BUFFERSIZE:
 404                 *data = g_variant_new_uint64(buffersizes[devc->last_step]);
 405                 break;
 406         case SR_CONF_VDIV:
 407                 if (ch == -1) {
 408                         ret = SR_ERR_CHANNEL_GROUP;
 409                 } else {
 410                         i = reverse_map(devc->cctl[ch] & 0x33, vdivs_map,
 411                                         ARRAY_SIZE(vdivs_map));
 412                         if (i == -1)
 413                                 ret = SR_ERR;
 414                         else
 415                                 *data = g_variant_new("(tt)", vdivs[i][0],
 416                                                       vdivs[i][1]);
 417                 }
 418                 break;
 419         case SR_CONF_COUPLING:
 420                 if (ch == -1) {
 421                         ret = SR_ERR_CHANNEL_GROUP;
 422                 } else {
 423                         i = reverse_map(devc->cctl[ch] & 0x0C, coupling_map,
 424                                         ARRAY_SIZE(coupling_map));
 425                         if (i == -1)
 426                                 ret = SR_ERR;
 427                         else
 428                                 *data = g_variant_new_string(coupling[i]);
 429                 }
 430                 break;
 431         case SR_CONF_PROBE_FACTOR:
 432                 if (ch == -1)
 433                         ret = SR_ERR_CHANNEL_GROUP;
 434                 else
 435                         *data = g_variant_new_uint64(devc->probe[ch]);
 436                 break;
 437         default:
 438                 ret = SR_ERR_NA;
 439         }
 440
 441         return ret;
 442 }
 443
 444 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 445                 const struct sr_channel_group *cg)
 446 {
 447         struct dev_context *devc = sdi->priv;
 448         int ret, i, ch = -1;
 449         uint64_t u, v;
 450
 451         if (cg) /* sr_config_set will validate cg using config_list */
 452                 ch = ((struct sr_channel *)cg->channels->data)->index;
 453
 454         if (sdi->status != SR_ST_ACTIVE)
 455                 return SR_ERR_DEV_CLOSED;
 456
 457         ret = SR_OK;
 458         switch (key) {
 459         case SR_CONF_LIMIT_FRAMES:
 460                 devc->frame_limit = g_variant_get_uint64(data);
 461                 break;
 462         case SR_CONF_SAMPLERATE:
 463                 i = find_in_array(data, G_VARIANT_TYPE_UINT64,
 464                                   samplerates, ARRAY_SIZE(samplerates));
 465                 if (i == -1)
 466                         ret = SR_ERR_ARG;
 467                 else
 468                         devc->rate = i;
 469                 break;
 470         case SR_CONF_TRIGGER_SOURCE:
 471                 i = find_in_array(data, G_VARIANT_TYPE_STRING,
 472                                   trigger_sources, ARRAY_SIZE(trigger_sources));
 473                 if (i == -1)
 474                         ret = SR_ERR_ARG;
 475                 else
 476                         devc->cctl[0] = (devc->cctl[0] & 0x3F)
 477                                       | trigger_sources_map[i];
 478                 break;
 479         case SR_CONF_TRIGGER_SLOPE:
 480                 i = find_in_array(data, G_VARIANT_TYPE_STRING,
 481                                   trigger_slopes, ARRAY_SIZE(trigger_slopes));
 482                 if (i == -1)
 483                         ret = SR_ERR_ARG;
 484                 else
 485                         devc->edge = i;
 486                 break;
 487         case SR_CONF_BUFFERSIZE:
 488                 i = find_in_array(data, G_VARIANT_TYPE_UINT64,
 489                                   buffersizes, ARRAY_SIZE(buffersizes));
 490                 if (i == -1)
 491                         ret = SR_ERR_ARG;
 492                 else
 493                         devc->last_step = i;
 494                 break;
 495         case SR_CONF_VDIV:
 496                 if (ch == -1) {
 497                         ret = SR_ERR_CHANNEL_GROUP;
 498                 } else if (!g_variant_is_of_type(data, G_VARIANT_TYPE("(tt)"))) {
 499                         ret = SR_ERR_ARG;
 500                 } else {
 501                         g_variant_get(data, "(tt)", &u, &v);
 502                         for (i = 0; i < (int)ARRAY_SIZE(vdivs); i++)
 503                                 if (vdivs[i][0] == u && vdivs[i][1] == v)
 504                                         break;
 505                         if (i == ARRAY_SIZE(vdivs))
 506                                 ret = SR_ERR_ARG;
 507                         else
 508                                 devc->cctl[ch] = (devc->cctl[ch] & 0xCC)
 509                                                | vdivs_map[i];
 510                 }
 511                 break;
 512         case SR_CONF_COUPLING:
 513                 if (ch == -1) {
 514                         ret = SR_ERR_CHANNEL_GROUP;
 515                 } else {
 516                         i = find_in_array(data, G_VARIANT_TYPE_STRING,
 517                                           coupling, ARRAY_SIZE(coupling));
 518                         if (i == -1)
 519                                 ret = SR_ERR_ARG;
 520                         else
 521                                 devc->cctl[ch] = (devc->cctl[ch] & 0xF3)
 522                                                | coupling_map[i];
 523                 }
 524                 break;
 525         case SR_CONF_PROBE_FACTOR:
 526                 if (ch == -1) {
 527                         ret = SR_ERR_CHANNEL_GROUP;
 528                 } else {
 529                         u = g_variant_get_uint64(data);
 530                         if (!u)
 531                                 ret = SR_ERR_ARG;
 532                         else
 533                                 devc->probe[ch] = u;
 534                 }
 535                 break;
 536         default:
 537                 ret = SR_ERR_NA;
 538         }
 539
 540         return ret;
 541 }
 542
 543 static int config_channel_set(const struct sr_dev_inst *sdi,
 544                               struct sr_channel *ch,
 545                               unsigned int changes)
 546 {
 547         struct dev_context *devc = sdi->priv;
 548         uint8_t v;
 549
 550         if (changes & SR_CHANNEL_SET_ENABLED) {
 551                 if (ch->enabled) {
 552                         v = devc->channel | (1 << ch->index);
 553                         if (v & (v - 1))
 554                                 return SR_ERR;
 555                         devc->channel = v;
 556                         devc->enabled_channel->data = ch;
 557                 } else {
 558                         devc->channel &= ~(1 << ch->index);
 559                 }
 560         }
 561         return SR_OK;
 562 }
 563
 564 static int config_commit(const struct sr_dev_inst *sdi)
 565 {
 566         uint8_t state = hung_chang_dso_2100_read_mbox(sdi->conn, 0.02);
 567         int ret;
 568
 569         if (sdi->status != SR_ST_ACTIVE)
 570                 return SR_ERR_DEV_CLOSED;
 571
 572         switch (state) {
 573         case 0x03:
 574         case 0x14:
 575         case 0x21:
 576                 /* we will travel the complete config path on our way to state 1 */
 577                 break;
 578         case 0x00:
 579                 state = 0x01;
 580         default:
 581                 ret = hung_chang_dso_2100_move_to(sdi, 1);
 582                 if (ret != SR_OK)
 583                         return ret;
 584         case 0x01:
 585                 hung_chang_dso_2100_write_mbox(sdi->conn, 4);
 586         }
 587         ret = hung_chang_dso_2100_move_to(sdi, 1);
 588         if (ret != SR_OK)
 589                 return ret;
 590         return hung_chang_dso_2100_move_to(sdi, state);
 591 }
 592
 593 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 594                 const struct sr_channel_group *cg)
 595 {
 596         GVariantBuilder gvb;
 597         GVariant *gvar, *rational[2];
 598         GSList *l;
 599         int i;
 600
 601         switch (key) {
 602                 case SR_CONF_SCAN_OPTIONS:
 603         case SR_CONF_DEVICE_OPTIONS:
 604                 break;
 605         case SR_CONF_SAMPLERATE:
 606         case SR_CONF_TRIGGER_SOURCE:
 607         case SR_CONF_TRIGGER_SLOPE:
 608         case SR_CONF_BUFFERSIZE:
 609                 if (!sdi || cg)
 610                         return SR_ERR_NA;
 611                 break;
 612         case SR_CONF_VDIV:
 613         case SR_CONF_COUPLING:
 614                 if (!sdi)
 615                         return SR_ERR_NA;
 616                 if (!cg)
 617                         return SR_ERR_CHANNEL_GROUP;
 618                 l = g_slist_find(sdi->channel_groups, cg);
 619                 if (!l)
 620                         return SR_ERR_ARG;
 621                 break;
 622         default:
 623                 return SR_ERR_NA;
 624         }
 625
 626         switch (key) {
 627         case SR_CONF_SCAN_OPTIONS:
 628                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 629                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 630                 break;
 631         case SR_CONF_DEVICE_OPTIONS:
 632                 if (!sdi)
 633                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 634                                         drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
 635                 else if (!cg)
 636                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 637                                         devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 638                 else
 639                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 640                                         cgopts, ARRAY_SIZE(cgopts), sizeof(uint32_t));
 641                 break;
 642         case SR_CONF_SAMPLERATE:
 643                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 644                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
 645                                 samplerates, ARRAY_SIZE(samplerates), sizeof(uint64_t));
 646                 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
 647                 *data = g_variant_builder_end(&gvb);
 648                 break;
 649         case SR_CONF_TRIGGER_SOURCE:
 650                 *data = g_variant_new_strv(trigger_sources, ARRAY_SIZE(trigger_sources));
 651                 break;
 652         case SR_CONF_TRIGGER_SLOPE:
 653                 *data = g_variant_new_strv(trigger_slopes, ARRAY_SIZE(trigger_slopes));
 654                 break;
 655         case SR_CONF_BUFFERSIZE:
 656                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT64,
 657                                 buffersizes, ARRAY_SIZE(buffersizes), sizeof(uint64_t));
 658                 break;
 659         case SR_CONF_VDIV:
 660                 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 661                 for (i = 0; i < (int)ARRAY_SIZE(vdivs); i++) {
 662                         rational[0] = g_variant_new_uint64(vdivs[i][0]);
 663                         rational[1] = g_variant_new_uint64(vdivs[i][1]);
 664                         gvar = g_variant_new_tuple(rational, 2);
 665                         g_variant_builder_add_value(&gvb, gvar);
 666                 }
 667                 *data = g_variant_builder_end(&gvb);
 668                 break;
 669         case SR_CONF_COUPLING:
 670                 *data = g_variant_new_strv(coupling, ARRAY_SIZE(coupling));
 671                 break;
 672         }
 673
 674         return SR_OK;
 675 }
 676
 677 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 678 {
 679         struct dev_context *devc = sdi->priv;
 680         int ret;
 681
 682         if (sdi->status != SR_ST_ACTIVE)
 683                 return SR_ERR_DEV_CLOSED;
 684
 685         if (devc->channel) {
 686                 static const float res_array[] = {0.5, 1, 2, 5};
 687                 static const uint8_t relays[] = {100, 10, 10, 1};
 688                 devc->factor = devc->probe[devc->channel - 1] / 32.0;
 689                 devc->factor *= res_array[devc->cctl[devc->channel - 1] & 0x03];
 690                 devc->factor /= relays[(devc->cctl[devc->channel - 1] >> 4) & 0x03];
 691         }
 692         devc->frame = 0;
 693         devc->state_known = TRUE;
 694         devc->step = 0;
 695         devc->adc2 = FALSE;
 696         devc->retries = MAX_RETRIES;
 697
 698         ret = hung_chang_dso_2100_move_to(sdi, 0x21);
 699         if (ret != SR_OK)
 700                 return ret;
 701
 702         std_session_send_df_header(sdi, LOG_PREFIX);
 703
 704         sr_session_source_add(sdi->session, -1, 0, 8,
 705                               hung_chang_dso_2100_poll, (void *)sdi);
 706
 707         return SR_OK;
 708 }
 709
 710 SR_PRIV int hung_chang_dso_2100_dev_acquisition_stop(const struct sr_dev_inst *sdi)
 711 {
 712         if (sdi->status != SR_ST_ACTIVE)
 713                 return SR_ERR_DEV_CLOSED;
 714
 715         std_session_send_df_end(sdi, LOG_PREFIX);
 716         sr_session_source_remove(sdi->session, -1);
 717         hung_chang_dso_2100_move_to(sdi, 1);
 718
 719         return SR_OK;
 720 }
 721
 722 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 723 {
 724         return hung_chang_dso_2100_dev_acquisition_stop(sdi);
 725 }
 726
 727 SR_PRIV struct sr_dev_driver hung_chang_dso_2100_driver_info = {
 728         .name = "hung-chang-dso-2100",
 729         .longname = "Hung-Chang DSO-2100",
 730         .api_version = 1,
 731         .init = init,
 732         .cleanup = std_cleanup,
 733         .scan = scan,
 734         .dev_list = dev_list,
 735         .dev_clear = dev_clear,
 736         .config_get = config_get,
 737         .config_set = config_set,
 738         .config_channel_set = config_channel_set,
 739         .config_commit = config_commit,
 740         .config_list = config_list,
 741         .dev_open = dev_open,
 742         .dev_close = dev_close,
 743         .dev_acquisition_start = dev_acquisition_start,
 744         .dev_acquisition_stop = dev_acquisition_stop,
 745         .context = NULL,
 746 };