src/hardware/hantek-dso/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
   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 <stdio.h>
  22 #include <stdint.h>
  23 #include <stdlib.h>
  24 #include <sys/types.h>
  25 #include <sys/stat.h>
  26 #include <fcntl.h>
  27 #include <unistd.h>
  28 #include <string.h>
  29 #include <sys/time.h>
  30 #include <inttypes.h>
  31 #include <glib.h>
  32 #include <libusb.h>
  33 #include <libsigrok/libsigrok.h>
  34 #include "libsigrok-internal.h"
  35 #include "dso.h"
  36
  37 /* Max time in ms before we want to check on USB events */
  38 /* TODO tune this properly */
  39 #define TICK 1
  40
  41 #define NUM_TIMEBASE  10
  42 #define NUM_VDIV      8
  43
  44 #define NUM_BUFFER_SIZES 2
  45
  46 static const uint32_t scanopts[] = {
  47         SR_CONF_CONN,
  48 };
  49
  50 static const uint32_t drvopts[] = {
  51         SR_CONF_OSCILLOSCOPE,
  52 };
  53
  54 static const uint32_t devopts[] = {
  55         SR_CONF_CONTINUOUS,
  56         SR_CONF_LIMIT_FRAMES | SR_CONF_SET,
  57         SR_CONF_CONN | SR_CONF_GET,
  58         SR_CONF_TIMEBASE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  59         SR_CONF_BUFFERSIZE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  60         SR_CONF_TRIGGER_SOURCE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  61         SR_CONF_TRIGGER_SLOPE | SR_CONF_GET | SR_CONF_SET,
  62         SR_CONF_HORIZ_TRIGGERPOS | SR_CONF_GET | SR_CONF_SET,
  63         SR_CONF_NUM_HDIV | SR_CONF_GET,
  64         SR_CONF_NUM_VDIV | SR_CONF_GET,
  65 };
  66
  67 static const uint32_t devopts_cg[] = {
  68         SR_CONF_FILTER | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  69         SR_CONF_VDIV | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  70         SR_CONF_COUPLING | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  71 };
  72
  73 static const char *channel_names[] = {
  74         "CH1", "CH2",
  75 };
  76
  77 static const uint64_t buffersizes_32k[] = {
  78         (10 * 1024), (32 * 1024),
  79 };
  80 static const uint64_t buffersizes_512k[] = {
  81         (10 * 1024), (512 * 1024),
  82 };
  83 static const uint64_t buffersizes_14k[] = {
  84         (10 * 1024), (14 * 1024),
  85 };
  86
  87 static const struct dso_profile dev_profiles[] = {
  88         {       0x04b4, 0x2090, 0x04b5, 0x2090,
  89                 "Hantek", "DSO-2090",
  90                 buffersizes_32k,
  91                 "hantek-dso-2090.fw" },
  92         {       0x04b4, 0x2150, 0x04b5, 0x2150,
  93                 "Hantek", "DSO-2150",
  94                 buffersizes_32k,
  95                 "hantek-dso-2150.fw" },
  96         {       0x04b4, 0x2250, 0x04b5, 0x2250,
  97                 "Hantek", "DSO-2250",
  98                 buffersizes_512k,
  99                 "hantek-dso-2250.fw" },
 100         {       0x04b4, 0x5200, 0x04b5, 0x5200,
 101                 "Hantek", "DSO-5200",
 102                 buffersizes_14k,
 103                 "hantek-dso-5200.fw" },
 104         {       0x04b4, 0x520a, 0x04b5, 0x520a,
 105                 "Hantek", "DSO-5200A",
 106                 buffersizes_512k,
 107                 "hantek-dso-5200A.fw" },
 108         ALL_ZERO
 109 };
 110
 111 static const uint64_t timebases[][2] = {
 112         /* microseconds */
 113         { 10, 1000000 },
 114         { 20, 1000000 },
 115         { 40, 1000000 },
 116         { 100, 1000000 },
 117         { 200, 1000000 },
 118         { 400, 1000000 },
 119         /* milliseconds */
 120         { 1, 1000 },
 121         { 2, 1000 },
 122         { 4, 1000 },
 123         { 10, 1000 },
 124         { 20, 1000 },
 125         { 40, 1000 },
 126         { 100, 1000 },
 127         { 200, 1000 },
 128         { 400, 1000 },
 129 };
 130
 131 static const uint64_t vdivs[][2] = {
 132         /* millivolts */
 133         { 10, 1000 },
 134         { 20, 1000 },
 135         { 50, 1000 },
 136         { 100, 1000 },
 137         { 200, 1000 },
 138         { 500, 1000 },
 139         /* volts */
 140         { 1, 1 },
 141         { 2, 1 },
 142         { 5, 1 },
 143 };
 144
 145 static const char *trigger_sources[] = {
 146         "CH1",
 147         "CH2",
 148         "EXT",
 149         /* TODO: forced */
 150 };
 151
 152 static const char *trigger_slopes[] = {
 153         "r",
 154         "f",
 155 };
 156
 157 static const char *coupling[] = {
 158         "AC",
 159         "DC",
 160         "GND",
 161 };
 162
 163 static int dev_acquisition_stop(struct sr_dev_inst *sdi);
 164
 165 static struct sr_dev_inst *dso_dev_new(struct sr_dev_driver *di,
 166         const struct dso_profile *prof)
 167 {
 168         struct sr_dev_inst *sdi;
 169         struct sr_channel *ch;
 170         struct sr_channel_group *cg;
 171         struct drv_context *drvc;
 172         struct dev_context *devc;
 173         unsigned int i;
 174
 175         sdi = g_malloc0(sizeof(struct sr_dev_inst));
 176         sdi->status = SR_ST_INITIALIZING;
 177         sdi->vendor = g_strdup(prof->vendor);
 178         sdi->model = g_strdup(prof->model);
 179         sdi->driver = di;
 180
 181         /*
 182          * Add only the real channels -- EXT isn't a source of data, only
 183          * a trigger source internal to the device.
 184          */
 185         for (i = 0; i < ARRAY_SIZE(channel_names); i++) {
 186                 ch = sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, TRUE, channel_names[i]);
 187                 cg = g_malloc0(sizeof(struct sr_channel_group));
 188                 cg->name = g_strdup(channel_names[i]);
 189                 cg->channels = g_slist_append(cg->channels, ch);
 190                 sdi->channel_groups = g_slist_append(sdi->channel_groups, cg);
 191         }
 192
 193         devc = g_malloc0(sizeof(struct dev_context));
 194         devc->profile = prof;
 195         devc->dev_state = IDLE;
 196         devc->timebase = DEFAULT_TIMEBASE;
 197         devc->ch1_enabled = TRUE;
 198         devc->ch2_enabled = TRUE;
 199         devc->voltage[0] = DEFAULT_VOLTAGE;
 200         devc->voltage[1] = DEFAULT_VOLTAGE;
 201         devc->coupling[0] = DEFAULT_COUPLING;
 202         devc->coupling[1] = DEFAULT_COUPLING;
 203         devc->voffset_ch1 = DEFAULT_VERT_OFFSET;
 204         devc->voffset_ch2 = DEFAULT_VERT_OFFSET;
 205         devc->voffset_trigger = DEFAULT_VERT_TRIGGERPOS;
 206         devc->framesize = DEFAULT_FRAMESIZE;
 207         devc->triggerslope = SLOPE_POSITIVE;
 208         devc->triggersource = g_strdup(DEFAULT_TRIGGER_SOURCE);
 209         devc->triggerposition = DEFAULT_HORIZ_TRIGGERPOS;
 210         sdi->priv = devc;
 211         drvc = di->context;
 212         drvc->instances = g_slist_append(drvc->instances, sdi);
 213
 214         return sdi;
 215 }
 216
 217 static int configure_channels(const struct sr_dev_inst *sdi)
 218 {
 219         struct dev_context *devc;
 220         struct sr_channel *ch;
 221         const GSList *l;
 222         int p;
 223
 224         devc = sdi->priv;
 225
 226         g_slist_free(devc->enabled_channels);
 227         devc->ch1_enabled = devc->ch2_enabled = FALSE;
 228         for (l = sdi->channels, p = 0; l; l = l->next, p++) {
 229                 ch = l->data;
 230                 if (p == 0)
 231                         devc->ch1_enabled = ch->enabled;
 232                 else
 233                         devc->ch2_enabled = ch->enabled;
 234                 if (ch->enabled)
 235                         devc->enabled_channels = g_slist_append(devc->enabled_channels, ch);
 236         }
 237
 238         return SR_OK;
 239 }
 240
 241 static void clear_dev_context(void *priv)
 242 {
 243         struct dev_context *devc;
 244
 245         devc = priv;
 246         g_free(devc->triggersource);
 247         g_slist_free(devc->enabled_channels);
 248
 249 }
 250
 251 static int dev_clear(const struct sr_dev_driver *di)
 252 {
 253         return std_dev_clear(di, clear_dev_context);
 254 }
 255
 256 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 257 {
 258         struct drv_context *drvc;
 259         struct dev_context *devc;
 260         struct sr_dev_inst *sdi;
 261         struct sr_usb_dev_inst *usb;
 262         struct sr_config *src;
 263         const struct dso_profile *prof;
 264         GSList *l, *devices, *conn_devices;
 265         struct libusb_device_descriptor des;
 266         libusb_device **devlist;
 267         int i, j;
 268         const char *conn;
 269         char connection_id[64];
 270
 271         drvc = di->context;
 272
 273         devices = 0;
 274
 275         conn = NULL;
 276         for (l = options; l; l = l->next) {
 277                 src = l->data;
 278                 if (src->key == SR_CONF_CONN) {
 279                         conn = g_variant_get_string(src->data, NULL);
 280                         break;
 281                 }
 282         }
 283         if (conn)
 284                 conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
 285         else
 286                 conn_devices = NULL;
 287
 288         /* Find all Hantek DSO devices and upload firmware to all of them. */
 289         libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
 290         for (i = 0; devlist[i]; i++) {
 291                 if (conn) {
 292                         usb = NULL;
 293                         for (l = conn_devices; l; l = l->next) {
 294                                 usb = l->data;
 295                                 if (usb->bus == libusb_get_bus_number(devlist[i])
 296                                         && usb->address == libusb_get_device_address(devlist[i]))
 297                                         break;
 298                         }
 299                         if (!l)
 300                                 /* This device matched none of the ones that
 301                                  * matched the conn specification. */
 302                                 continue;
 303                 }
 304
 305                 libusb_get_device_descriptor(devlist[i], &des);
 306
 307                 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
 308
 309                 prof = NULL;
 310                 for (j = 0; dev_profiles[j].orig_vid; j++) {
 311                         if (des.idVendor == dev_profiles[j].orig_vid
 312                                 && des.idProduct == dev_profiles[j].orig_pid) {
 313                                 /* Device matches the pre-firmware profile. */
 314                                 prof = &dev_profiles[j];
 315                                 sr_dbg("Found a %s %s.", prof->vendor, prof->model);
 316                                 sdi = dso_dev_new(di, prof);
 317                                 sdi->connection_id = g_strdup(connection_id);
 318                                 devices = g_slist_append(devices, sdi);
 319                                 devc = sdi->priv;
 320                                 if (ezusb_upload_firmware(drvc->sr_ctx, devlist[i],
 321                                                 USB_CONFIGURATION, prof->firmware) == SR_OK)
 322                                         /* Remember when the firmware on this device was updated */
 323                                         devc->fw_updated = g_get_monotonic_time();
 324                                 else
 325                                         sr_err("Firmware upload failed");
 326                                 /* Dummy USB address of 0xff will get overwritten later. */
 327                                 sdi->conn = sr_usb_dev_inst_new(
 328                                                 libusb_get_bus_number(devlist[i]), 0xff, NULL);
 329                                 break;
 330                         } else if (des.idVendor == dev_profiles[j].fw_vid
 331                                 && des.idProduct == dev_profiles[j].fw_pid) {
 332                                 /* Device matches the post-firmware profile. */
 333                                 prof = &dev_profiles[j];
 334                                 sr_dbg("Found a %s %s.", prof->vendor, prof->model);
 335                                 sdi = dso_dev_new(di, prof);
 336                                 sdi->connection_id = g_strdup(connection_id);
 337                                 sdi->status = SR_ST_INACTIVE;
 338                                 devices = g_slist_append(devices, sdi);
 339                                 sdi->inst_type = SR_INST_USB;
 340                                 sdi->conn = sr_usb_dev_inst_new(
 341                                                 libusb_get_bus_number(devlist[i]),
 342                                                 libusb_get_device_address(devlist[i]), NULL);
 343                                 break;
 344                         }
 345                 }
 346                 if (!prof)
 347                         /* not a supported VID/PID */
 348                         continue;
 349         }
 350         libusb_free_device_list(devlist, 1);
 351
 352         return devices;
 353 }
 354
 355 static int dev_open(struct sr_dev_inst *sdi)
 356 {
 357         struct dev_context *devc;
 358         struct sr_usb_dev_inst *usb;
 359         int64_t timediff_us, timediff_ms;
 360         int err;
 361
 362         devc = sdi->priv;
 363         usb = sdi->conn;
 364
 365         /*
 366          * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
 367          * for the FX2 to renumerate.
 368          */
 369         err = SR_ERR;
 370         if (devc->fw_updated > 0) {
 371                 sr_info("Waiting for device to reset.");
 372                 /* Takes >= 300ms for the FX2 to be gone from the USB bus. */
 373                 g_usleep(300 * 1000);
 374                 timediff_ms = 0;
 375                 while (timediff_ms < MAX_RENUM_DELAY_MS) {
 376                         if ((err = dso_open(sdi)) == SR_OK)
 377                                 break;
 378                         g_usleep(100 * 1000);
 379                         timediff_us = g_get_monotonic_time() - devc->fw_updated;
 380                         timediff_ms = timediff_us / 1000;
 381                         sr_spew("Waited %" PRIi64 " ms.", timediff_ms);
 382                 }
 383                 sr_info("Device came back after %" PRIi64 " ms.", timediff_ms);
 384         } else {
 385                 err = dso_open(sdi);
 386         }
 387
 388         if (err != SR_OK) {
 389                 sr_err("Unable to open device.");
 390                 return SR_ERR;
 391         }
 392
 393         err = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
 394         if (err != 0) {
 395                 sr_err("Unable to claim interface: %s.",
 396                            libusb_error_name(err));
 397                 return SR_ERR;
 398         }
 399
 400         return SR_OK;
 401 }
 402
 403 static int dev_close(struct sr_dev_inst *sdi)
 404 {
 405         dso_close(sdi);
 406
 407         return SR_OK;
 408 }
 409
 410 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 411                 const struct sr_channel_group *cg)
 412 {
 413         struct dev_context *devc;
 414         struct sr_usb_dev_inst *usb;
 415         char str[128];
 416         const char *s;
 417         const uint64_t *vdiv;
 418         int ch_idx;
 419
 420         switch (key) {
 421         case SR_CONF_NUM_HDIV:
 422                 *data = g_variant_new_int32(NUM_TIMEBASE);
 423                 break;
 424         case SR_CONF_NUM_VDIV:
 425                 *data = g_variant_new_int32(NUM_VDIV);
 426                 break;
 427         }
 428
 429         if (!sdi)
 430                 return SR_ERR_ARG;
 431
 432         devc = sdi->priv;
 433         if (!cg) {
 434                 switch (key) {
 435                 case SR_CONF_CONN:
 436                         if (!sdi->conn)
 437                                 return SR_ERR_ARG;
 438                         usb = sdi->conn;
 439                         if (usb->address == 255)
 440                                 /* Device still needs to re-enumerate after firmware
 441                                  * upload, so we don't know its (future) address. */
 442                                 return SR_ERR;
 443                         snprintf(str, 128, "%d.%d", usb->bus, usb->address);
 444                         *data = g_variant_new_string(str);
 445                         break;
 446                 case SR_CONF_TIMEBASE:
 447                         *data = g_variant_new("(tt)", timebases[devc->timebase][0],
 448                                         timebases[devc->timebase][1]);
 449                         break;
 450                 case SR_CONF_BUFFERSIZE:
 451                         *data = g_variant_new_uint64(devc->framesize);
 452                         break;
 453                 case SR_CONF_TRIGGER_SOURCE:
 454                         *data = g_variant_new_string(devc->triggersource);
 455                         break;
 456                 case SR_CONF_TRIGGER_SLOPE:
 457                         s = (devc->triggerslope == SLOPE_POSITIVE) ? "r" : "f";
 458                         *data = g_variant_new_string(s);
 459                         break;
 460                 case SR_CONF_HORIZ_TRIGGERPOS:
 461                         *data = g_variant_new_double(devc->triggerposition);
 462                         break;
 463                 default:
 464                         return SR_ERR_NA;
 465                 }
 466         } else {
 467                 if (sdi->channel_groups->data == cg)
 468                         ch_idx = 0;
 469                 else if (sdi->channel_groups->next->data == cg)
 470                         ch_idx = 1;
 471                 else
 472                         return SR_ERR_ARG;
 473                 switch (key) {
 474                 case SR_CONF_FILTER:
 475                         *data = g_variant_new_boolean(devc->filter[ch_idx]);
 476                         break;
 477                 case SR_CONF_VDIV:
 478                         vdiv = vdivs[devc->voltage[ch_idx]];
 479                         *data = g_variant_new("(tt)", vdiv[0], vdiv[1]);
 480                         break;
 481                 case SR_CONF_COUPLING:
 482                         *data = g_variant_new_string(coupling[devc->coupling[ch_idx]]);
 483                         break;
 484                 }
 485         }
 486
 487         return SR_OK;
 488 }
 489
 490 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 491                 const struct sr_channel_group *cg)
 492 {
 493         struct dev_context *devc;
 494         double tmp_double;
 495         uint64_t tmp_u64, p, q;
 496         int tmp_int, ch_idx, ret;
 497         unsigned int i;
 498         const char *tmp_str;
 499
 500         if (sdi->status != SR_ST_ACTIVE)
 501                 return SR_ERR_DEV_CLOSED;
 502
 503         ret = SR_OK;
 504         devc = sdi->priv;
 505         if (!cg) {
 506                 switch (key) {
 507                 case SR_CONF_LIMIT_FRAMES:
 508                         devc->limit_frames = g_variant_get_uint64(data);
 509                         break;
 510                 case SR_CONF_TRIGGER_SLOPE:
 511                         tmp_str = g_variant_get_string(data, NULL);
 512                         if (!tmp_str || !(tmp_str[0] == 'f' || tmp_str[0] == 'r'))
 513                                 return SR_ERR_ARG;
 514                         devc->triggerslope = (tmp_str[0] == 'r')
 515                                 ? SLOPE_POSITIVE : SLOPE_NEGATIVE;
 516                         break;
 517                 case SR_CONF_HORIZ_TRIGGERPOS:
 518                         tmp_double = g_variant_get_double(data);
 519                         if (tmp_double < 0.0 || tmp_double > 1.0) {
 520                                 sr_err("Trigger position should be between 0.0 and 1.0.");
 521                                 ret = SR_ERR_ARG;
 522                         } else
 523                                 devc->triggerposition = tmp_double;
 524                         break;
 525                 case SR_CONF_BUFFERSIZE:
 526                         tmp_u64 = g_variant_get_uint64(data);
 527                         for (i = 0; i < NUM_BUFFER_SIZES; i++) {
 528                                 if (devc->profile->buffersizes[i] == tmp_u64) {
 529                                         devc->framesize = tmp_u64;
 530                                         break;
 531                                 }
 532                         }
 533                         if (i == NUM_BUFFER_SIZES)
 534                                 ret = SR_ERR_ARG;
 535                         break;
 536                 case SR_CONF_TIMEBASE:
 537                         g_variant_get(data, "(tt)", &p, &q);
 538                         tmp_int = -1;
 539                         for (i = 0; i < ARRAY_SIZE(timebases); i++) {
 540                                 if (timebases[i][0] == p && timebases[i][1] == q) {
 541                                         tmp_int = i;
 542                                         break;
 543                                 }
 544                         }
 545                         if (tmp_int >= 0)
 546                                 devc->timebase = tmp_int;
 547                         else
 548                                 ret = SR_ERR_ARG;
 549                         break;
 550                 case SR_CONF_TRIGGER_SOURCE:
 551                         tmp_str = g_variant_get_string(data, NULL);
 552                         for (i = 0; trigger_sources[i]; i++) {
 553                                 if (!strcmp(tmp_str, trigger_sources[i])) {
 554                                         devc->triggersource = g_strdup(tmp_str);
 555                                         break;
 556                                 }
 557                         }
 558                         if (trigger_sources[i] == 0)
 559                                 ret = SR_ERR_ARG;
 560                         break;
 561                 default:
 562                         ret = SR_ERR_NA;
 563                         break;
 564                 }
 565         } else {
 566                 if (sdi->channel_groups->data == cg)
 567                         ch_idx = 0;
 568                 else if (sdi->channel_groups->next->data == cg)
 569                         ch_idx = 1;
 570                 else
 571                         return SR_ERR_ARG;
 572                 switch (key) {
 573                 case SR_CONF_FILTER:
 574                         devc->filter[ch_idx] = g_variant_get_boolean(data);
 575                         break;
 576                 case SR_CONF_VDIV:
 577                         g_variant_get(data, "(tt)", &p, &q);
 578                         tmp_int = -1;
 579                         for (i = 0; i < ARRAY_SIZE(vdivs); i++) {
 580                                 if (vdivs[i][0] == p && vdivs[i][1] == q) {
 581                                         tmp_int = i;
 582                                         break;
 583                                 }
 584                         }
 585                         if (tmp_int >= 0) {
 586                                 devc->voltage[ch_idx] = tmp_int;
 587                         } else
 588                                 ret = SR_ERR_ARG;
 589                         break;
 590                 case SR_CONF_COUPLING:
 591                         tmp_str = g_variant_get_string(data, NULL);
 592                         for (i = 0; coupling[i]; i++) {
 593                                 if (!strcmp(tmp_str, coupling[i])) {
 594                                         devc->coupling[ch_idx] = i;
 595                                         break;
 596                                 }
 597                         }
 598                         if (coupling[i] == 0)
 599                                 ret = SR_ERR_ARG;
 600                         break;
 601                 default:
 602                         ret = SR_ERR_NA;
 603                         break;
 604                 }
 605         }
 606
 607         return ret;
 608 }
 609
 610 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 611                 const struct sr_channel_group *cg)
 612 {
 613         struct dev_context *devc;
 614         GVariant *tuple, *rational[2];
 615         GVariantBuilder gvb;
 616         unsigned int i;
 617
 618         if (key == SR_CONF_SCAN_OPTIONS) {
 619                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 620                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 621                 return SR_OK;
 622         } else if (key == SR_CONF_DEVICE_OPTIONS && !sdi) {
 623                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 624                                 drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
 625                 return SR_OK;
 626         }
 627
 628         if (!sdi)
 629                 return SR_ERR_ARG;
 630
 631         if (!cg) {
 632                 switch (key) {
 633                 case SR_CONF_DEVICE_OPTIONS:
 634                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 635                                         devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 636                         break;
 637                 case SR_CONF_BUFFERSIZE:
 638                         if (!sdi)
 639                                 return SR_ERR_ARG;
 640                         devc = sdi->priv;
 641                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT64,
 642                                         devc->profile->buffersizes, NUM_BUFFER_SIZES, sizeof(uint64_t));
 643                         break;
 644                 case SR_CONF_TIMEBASE:
 645                         g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 646                         for (i = 0; i < ARRAY_SIZE(timebases); i++) {
 647                                 rational[0] = g_variant_new_uint64(timebases[i][0]);
 648                                 rational[1] = g_variant_new_uint64(timebases[i][1]);
 649                                 tuple = g_variant_new_tuple(rational, 2);
 650                                 g_variant_builder_add_value(&gvb, tuple);
 651                         }
 652                         *data = g_variant_builder_end(&gvb);
 653                         break;
 654                 case SR_CONF_TRIGGER_SOURCE:
 655                         *data = g_variant_new_strv(trigger_sources,
 656                                         ARRAY_SIZE(trigger_sources));
 657                         break;
 658                 case SR_CONF_TRIGGER_SLOPE:
 659                         *data = g_variant_new_strv(trigger_slopes,
 660                                         ARRAY_SIZE(trigger_slopes));
 661                         break;
 662                 default:
 663                         return SR_ERR_NA;
 664                 }
 665         } else {
 666                 switch (key) {
 667                 case SR_CONF_DEVICE_OPTIONS:
 668                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 669                                         devopts_cg, ARRAY_SIZE(devopts_cg), sizeof(uint32_t));
 670                         break;
 671                 case SR_CONF_COUPLING:
 672                         *data = g_variant_new_strv(coupling, ARRAY_SIZE(coupling));
 673                         break;
 674                 case SR_CONF_VDIV:
 675                         g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 676                         for (i = 0; i < ARRAY_SIZE(vdivs); i++) {
 677                                 rational[0] = g_variant_new_uint64(vdivs[i][0]);
 678                                 rational[1] = g_variant_new_uint64(vdivs[i][1]);
 679                                 tuple = g_variant_new_tuple(rational, 2);
 680                                 g_variant_builder_add_value(&gvb, tuple);
 681                         }
 682                         *data = g_variant_builder_end(&gvb);
 683                         break;
 684                 default:
 685                         return SR_ERR_NA;
 686                 }
 687         }
 688
 689         return SR_OK;
 690 }
 691
 692 static void send_chunk(struct sr_dev_inst *sdi, unsigned char *buf,
 693                 int num_samples)
 694 {
 695         struct sr_datafeed_packet packet;
 696         struct sr_datafeed_analog_old analog;
 697         struct dev_context *devc;
 698         float ch1, ch2, range;
 699         int num_channels, data_offset, i;
 700
 701         devc = sdi->priv;
 702         num_channels = (devc->ch1_enabled && devc->ch2_enabled) ? 2 : 1;
 703         packet.type = SR_DF_ANALOG_OLD;
 704         packet.payload = &analog;
 705         /* TODO: support for 5xxx series 9-bit samples */
 706         analog.channels = devc->enabled_channels;
 707         analog.num_samples = num_samples;
 708         analog.mq = SR_MQ_VOLTAGE;
 709         analog.unit = SR_UNIT_VOLT;
 710         analog.mqflags = 0;
 711         /* TODO: Check malloc return value. */
 712         analog.data = g_try_malloc(analog.num_samples * sizeof(float) * num_channels);
 713         data_offset = 0;
 714         for (i = 0; i < analog.num_samples; i++) {
 715                 /*
 716                  * The device always sends data for both channels. If a channel
 717                  * is disabled, it contains a copy of the enabled channel's
 718                  * data. However, we only send the requested channels to
 719                  * the bus.
 720                  *
 721                  * Voltage values are encoded as a value 0-255 (0-512 on the
 722                  * DSO-5200*), where the value is a point in the range
 723                  * represented by the vdiv setting. There are 8 vertical divs,
 724                  * so e.g. 500mV/div represents 4V peak-to-peak where 0 = -2V
 725                  * and 255 = +2V.
 726                  */
 727                 /* TODO: Support for DSO-5xxx series 9-bit samples. */
 728                 if (devc->ch1_enabled) {
 729                         range = ((float)vdivs[devc->voltage[0]][0] / vdivs[devc->voltage[0]][1]) * 8;
 730                         ch1 = range / 255 * *(buf + i * 2 + 1);
 731                         /* Value is centered around 0V. */
 732                         ch1 -= range / 2;
 733                         analog.data[data_offset++] = ch1;
 734                 }
 735                 if (devc->ch2_enabled) {
 736                         range = ((float)vdivs[devc->voltage[1]][0] / vdivs[devc->voltage[1]][1]) * 8;
 737                         ch2 = range / 255 * *(buf + i * 2);
 738                         ch2 -= range / 2;
 739                         analog.data[data_offset++] = ch2;
 740                 }
 741         }
 742         sr_session_send(sdi, &packet);
 743         g_free(analog.data);
 744 }
 745
 746 /*
 747  * Called by libusb (as triggered by handle_event()) when a transfer comes in.
 748  * Only channel data comes in asynchronously, and all transfers for this are
 749  * queued up beforehand, so this just needs to chuck the incoming data onto
 750  * the libsigrok session bus.
 751  */
 752 static void LIBUSB_CALL receive_transfer(struct libusb_transfer *transfer)
 753 {
 754         struct sr_datafeed_packet packet;
 755         struct sr_dev_inst *sdi;
 756         struct dev_context *devc;
 757         int num_samples, pre;
 758
 759         sdi = transfer->user_data;
 760         devc = sdi->priv;
 761         sr_spew("receive_transfer(): status %s received %d bytes.",
 762                 libusb_error_name(transfer->status), transfer->actual_length);
 763
 764         if (transfer->actual_length == 0)
 765                 /* Nothing to send to the bus. */
 766                 return;
 767
 768         num_samples = transfer->actual_length / 2;
 769
 770         sr_spew("Got %d-%d/%d samples in frame.", devc->samp_received + 1,
 771                    devc->samp_received + num_samples, devc->framesize);
 772
 773         /*
 774          * The device always sends a full frame, but the beginning of the frame
 775          * doesn't represent the trigger point. The offset at which the trigger
 776          * happened came in with the capture state, so we need to start sending
 777          * from there up the session bus. The samples in the frame buffer
 778          * before that trigger point came after the end of the device's frame
 779          * buffer was reached, and it wrapped around to overwrite up until the
 780          * trigger point.
 781          */
 782         if (devc->samp_received < devc->trigger_offset) {
 783                 /* Trigger point not yet reached. */
 784                 if (devc->samp_received + num_samples < devc->trigger_offset) {
 785                         /* The entire chunk is before the trigger point. */
 786                         memcpy(devc->framebuf + devc->samp_buffered * 2,
 787                                         transfer->buffer, num_samples * 2);
 788                         devc->samp_buffered += num_samples;
 789                 } else {
 790                         /*
 791                          * This chunk hits or overruns the trigger point.
 792                          * Store the part before the trigger fired, and
 793                          * send the rest up to the session bus.
 794                          */
 795                         pre = devc->trigger_offset - devc->samp_received;
 796                         memcpy(devc->framebuf + devc->samp_buffered * 2,
 797                                         transfer->buffer, pre * 2);
 798                         devc->samp_buffered += pre;
 799
 800                         /* The rest of this chunk starts with the trigger point. */
 801                         sr_dbg("Reached trigger point, %d samples buffered.",
 802                                    devc->samp_buffered);
 803
 804                         /* Avoid the corner case where the chunk ended at
 805                          * exactly the trigger point. */
 806                         if (num_samples > pre)
 807                                 send_chunk(sdi, transfer->buffer + pre * 2,
 808                                                 num_samples - pre);
 809                 }
 810         } else {
 811                 /* Already past the trigger point, just send it all out. */
 812                 send_chunk(sdi, transfer->buffer, num_samples);
 813         }
 814
 815         devc->samp_received += num_samples;
 816
 817         /* Everything in this transfer was either copied to the buffer or
 818          * sent to the session bus. */
 819         g_free(transfer->buffer);
 820         libusb_free_transfer(transfer);
 821
 822         if (devc->samp_received >= devc->framesize) {
 823                 /* That was the last chunk in this frame. Send the buffered
 824                  * pre-trigger samples out now, in one big chunk. */
 825                 sr_dbg("End of frame, sending %d pre-trigger buffered samples.",
 826                            devc->samp_buffered);
 827                 send_chunk(sdi, devc->framebuf, devc->samp_buffered);
 828
 829                 /* Mark the end of this frame. */
 830                 packet.type = SR_DF_FRAME_END;
 831                 sr_session_send(sdi, &packet);
 832
 833                 if (devc->limit_frames && ++devc->num_frames == devc->limit_frames) {
 834                         /* Terminate session */
 835                         devc->dev_state = STOPPING;
 836                 } else {
 837                         devc->dev_state = NEW_CAPTURE;
 838                 }
 839         }
 840 }
 841
 842 static int handle_event(int fd, int revents, void *cb_data)
 843 {
 844         const struct sr_dev_inst *sdi;
 845         struct sr_datafeed_packet packet;
 846         struct timeval tv;
 847         struct sr_dev_driver *di;
 848         struct dev_context *devc;
 849         struct drv_context *drvc;
 850         int num_channels;
 851         uint32_t trigger_offset;
 852         uint8_t capturestate;
 853
 854         (void)fd;
 855         (void)revents;
 856
 857         sdi = cb_data;
 858         di = sdi->driver;
 859         drvc = di->context;
 860         devc = sdi->priv;
 861         if (devc->dev_state == STOPPING) {
 862                 /* We've been told to wind up the acquisition. */
 863                 sr_dbg("Stopping acquisition.");
 864                 /*
 865                  * TODO: Doesn't really cancel pending transfers so they might
 866                  * come in after SR_DF_END is sent.
 867                  */
 868                 usb_source_remove(sdi->session, drvc->sr_ctx);
 869
 870                 std_session_send_df_end(sdi, LOG_PREFIX);
 871
 872                 devc->dev_state = IDLE;
 873
 874                 return TRUE;
 875         }
 876
 877         /* Always handle pending libusb events. */
 878         tv.tv_sec = tv.tv_usec = 0;
 879         libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
 880
 881         /* TODO: ugh */
 882         if (devc->dev_state == NEW_CAPTURE) {
 883                 if (dso_capture_start(sdi) != SR_OK)
 884                         return TRUE;
 885                 if (dso_enable_trigger(sdi) != SR_OK)
 886                         return TRUE;
 887 //              if (dso_force_trigger(sdi) != SR_OK)
 888 //                      return TRUE;
 889                 sr_dbg("Successfully requested next chunk.");
 890                 devc->dev_state = CAPTURE;
 891                 return TRUE;
 892         }
 893         if (devc->dev_state != CAPTURE)
 894                 return TRUE;
 895
 896         if ((dso_get_capturestate(sdi, &capturestate, &trigger_offset)) != SR_OK)
 897                 return TRUE;
 898
 899         sr_dbg("Capturestate %d.", capturestate);
 900         sr_dbg("Trigger offset 0x%.6x.", trigger_offset);
 901         switch (capturestate) {
 902         case CAPTURE_EMPTY:
 903                 if (++devc->capture_empty_count >= MAX_CAPTURE_EMPTY) {
 904                         devc->capture_empty_count = 0;
 905                         if (dso_capture_start(sdi) != SR_OK)
 906                                 break;
 907                         if (dso_enable_trigger(sdi) != SR_OK)
 908                                 break;
 909 //                      if (dso_force_trigger(sdi) != SR_OK)
 910 //                              break;
 911                         sr_dbg("Successfully requested next chunk.");
 912                 }
 913                 break;
 914         case CAPTURE_FILLING:
 915                 /* No data yet. */
 916                 break;
 917         case CAPTURE_READY_8BIT:
 918                 /* Remember where in the captured frame the trigger is. */
 919                 devc->trigger_offset = trigger_offset;
 920
 921                 num_channels = (devc->ch1_enabled && devc->ch2_enabled) ? 2 : 1;
 922                 devc->framebuf = g_malloc(devc->framesize * num_channels * 2);
 923                 devc->samp_buffered = devc->samp_received = 0;
 924
 925                 /* Tell the scope to send us the first frame. */
 926                 if (dso_get_channeldata(sdi, receive_transfer) != SR_OK)
 927                         break;
 928
 929                 /*
 930                  * Don't hit the state machine again until we're done fetching
 931                  * the data we just told the scope to send.
 932                  */
 933                 devc->dev_state = FETCH_DATA;
 934
 935                 /* Tell the frontend a new frame is on the way. */
 936                 packet.type = SR_DF_FRAME_BEGIN;
 937                 sr_session_send(sdi, &packet);
 938                 break;
 939         case CAPTURE_READY_9BIT:
 940                 /* TODO */
 941                 sr_err("Not yet supported.");
 942                 break;
 943         case CAPTURE_TIMEOUT:
 944                 /* Doesn't matter, we'll try again next time. */
 945                 break;
 946         default:
 947                 sr_dbg("Unknown capture state: %d.", capturestate);
 948                 break;
 949         }
 950
 951         return TRUE;
 952 }
 953
 954 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 955 {
 956         struct dev_context *devc;
 957         struct sr_dev_driver *di = sdi->driver;
 958         struct drv_context *drvc = di->context;
 959
 960         if (sdi->status != SR_ST_ACTIVE)
 961                 return SR_ERR_DEV_CLOSED;
 962
 963         devc = sdi->priv;
 964
 965         if (configure_channels(sdi) != SR_OK) {
 966                 sr_err("Failed to configure channels.");
 967                 return SR_ERR;
 968         }
 969
 970         if (dso_init(sdi) != SR_OK)
 971                 return SR_ERR;
 972
 973         if (dso_capture_start(sdi) != SR_OK)
 974                 return SR_ERR;
 975
 976         devc->dev_state = CAPTURE;
 977         usb_source_add(sdi->session, drvc->sr_ctx, TICK, handle_event, (void *)sdi);
 978
 979         std_session_send_df_header(sdi, LOG_PREFIX);
 980
 981         return SR_OK;
 982 }
 983
 984 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 985 {
 986         struct dev_context *devc;
 987
 988         if (sdi->status != SR_ST_ACTIVE)
 989                 return SR_ERR;
 990
 991         devc = sdi->priv;
 992         devc->dev_state = STOPPING;
 993
 994         return SR_OK;
 995 }
 996
 997 SR_PRIV struct sr_dev_driver hantek_dso_driver_info = {
 998         .name = "hantek-dso",
 999         .longname = "Hantek DSO",
1000         .api_version = 1,
1001         .init = std_init,
1002         .cleanup = std_cleanup,
1003         .scan = scan,
1004         .dev_list = std_dev_list,
1005         .dev_clear = dev_clear,
1006         .config_get = config_get,
1007         .config_set = config_set,
1008         .config_list = config_list,
1009         .dev_open = dev_open,
1010         .dev_close = dev_close,
1011         .dev_acquisition_start = dev_acquisition_start,
1012         .dev_acquisition_stop = dev_acquisition_stop,
1013         .context = NULL,
1014 };