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 <stdio.h>
  21 #include <stdint.h>
  22 #include <stdlib.h>
  23 #include <sys/types.h>
  24 #include <sys/stat.h>
  25 #include <fcntl.h>
  26 #include <unistd.h>
  27 #include <string.h>
  28 #include <sys/time.h>
  29 #include <inttypes.h>
  30 #include <glib.h>
  31 #include <libusb.h>
  32 #include "libsigrok.h"
  33 #include "libsigrok-internal.h"
  34 #include "dso.h"
  35
  36 /* Max time in ms before we want to check on USB events */
  37 /* TODO tune this properly */
  38 #define TICK 1
  39
  40 #define NUM_TIMEBASE  10
  41 #define NUM_VDIV      8
  42
  43 static const uint32_t scanopts[] = {
  44         SR_CONF_CONN,
  45 };
  46
  47 static const uint32_t devopts[] = {
  48         SR_CONF_OSCILLOSCOPE,
  49         SR_CONF_CONTINUOUS,
  50         SR_CONF_LIMIT_FRAMES | SR_CONF_SET,
  51 };
  52
  53 static const uint32_t devopts_global[] = {
  54         SR_CONF_CONN | SR_CONF_GET,
  55         SR_CONF_TIMEBASE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  56         SR_CONF_BUFFERSIZE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  57         SR_CONF_TRIGGER_SOURCE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  58         SR_CONF_TRIGGER_SLOPE | SR_CONF_GET | SR_CONF_SET,
  59         SR_CONF_HORIZ_TRIGGERPOS | SR_CONF_GET | SR_CONF_SET,
  60         SR_CONF_NUM_TIMEBASE | SR_CONF_GET,
  61         SR_CONF_NUM_VDIV | SR_CONF_GET,
  62 };
  63
  64 static const uint32_t devopts_cg[] = {
  65         SR_CONF_FILTER | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  66         SR_CONF_VDIV | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  67         SR_CONF_COUPLING | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  68 };
  69
  70 static const char *channel_names[] = {
  71         "CH1", "CH2",
  72         NULL,
  73 };
  74
  75 static const uint64_t buffersizes_32k[] = {
  76         10240, 32768,
  77 };
  78 static const uint64_t buffersizes_512k[] = {
  79         10240, 524288,
  80 };
  81 static const uint64_t buffersizes_14k[] = {
  82         10240, 14336,
  83 };
  84
  85 static const struct dso_profile dev_profiles[] = {
  86         {       0x04b4, 0x2090, 0x04b5, 0x2090,
  87                 "Hantek", "DSO-2090",
  88                 buffersizes_32k,
  89                 FIRMWARE_DIR "/hantek-dso-2090.fw" },
  90         {       0x04b4, 0x2150, 0x04b5, 0x2150,
  91                 "Hantek", "DSO-2150",
  92                 buffersizes_32k,
  93                 FIRMWARE_DIR "/hantek-dso-2150.fw" },
  94         {       0x04b4, 0x2250, 0x04b5, 0x2250,
  95                 "Hantek", "DSO-2250",
  96                 buffersizes_512k,
  97                 FIRMWARE_DIR "/hantek-dso-2250.fw" },
  98         {       0x04b4, 0x5200, 0x04b5, 0x5200,
  99                 "Hantek", "DSO-5200",
 100                 buffersizes_14k,
 101                 FIRMWARE_DIR "/hantek-dso-5200.fw" },
 102         {       0x04b4, 0x520a, 0x04b5, 0x520a,
 103                 "Hantek", "DSO-5200A",
 104                 buffersizes_512k,
 105                 FIRMWARE_DIR "/hantek-dso-5200A.fw" },
 106         { 0, 0, 0, 0, 0, 0, 0, 0 },
 107 };
 108
 109 static const uint64_t timebases[][2] = {
 110         /* microseconds */
 111         { 10, 1000000 },
 112         { 20, 1000000 },
 113         { 40, 1000000 },
 114         { 100, 1000000 },
 115         { 200, 1000000 },
 116         { 400, 1000000 },
 117         /* milliseconds */
 118         { 1, 1000 },
 119         { 2, 1000 },
 120         { 4, 1000 },
 121         { 10, 1000 },
 122         { 20, 1000 },
 123         { 40, 1000 },
 124         { 100, 1000 },
 125         { 200, 1000 },
 126         { 400, 1000 },
 127 };
 128
 129 static const uint64_t vdivs[][2] = {
 130         /* millivolts */
 131         { 10, 1000 },
 132         { 20, 1000 },
 133         { 50, 1000 },
 134         { 100, 1000 },
 135         { 200, 1000 },
 136         { 500, 1000 },
 137         /* volts */
 138         { 1, 1 },
 139         { 2, 1 },
 140         { 5, 1 },
 141 };
 142
 143 static const char *trigger_sources[] = {
 144         "CH1",
 145         "CH2",
 146         "EXT",
 147         /* TODO: forced */
 148 };
 149
 150 static const char *trigger_slopes[] = {
 151         "r",
 152         "f",
 153 };
 154
 155 static const char *coupling[] = {
 156         "AC",
 157         "DC",
 158         "GND",
 159 };
 160
 161 SR_PRIV struct sr_dev_driver hantek_dso_driver_info;
 162 static struct sr_dev_driver *di = &hantek_dso_driver_info;
 163
 164 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data);
 165
 166 static struct sr_dev_inst *dso_dev_new(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         int i;
 174
 175         sdi = sr_dev_inst_new(SR_ST_INITIALIZING, prof->vendor, prof->model, NULL);
 176         sdi->driver = di;
 177
 178         /*
 179          * Add only the real channels -- EXT isn't a source of data, only
 180          * a trigger source internal to the device.
 181          */
 182         for (i = 0; channel_names[i]; i++) {
 183                 ch = sr_channel_new(i, SR_CHANNEL_ANALOG, TRUE, channel_names[i]);
 184                 sdi->channels = g_slist_append(sdi->channels, ch);
 185                 cg = g_malloc0(sizeof(struct sr_channel_group));
 186                 cg->name = g_strdup(channel_names[i]);
 187                 cg->channels = g_slist_append(cg->channels, ch);
 188                 sdi->channel_groups = g_slist_append(sdi->channel_groups, cg);
 189         }
 190
 191         devc = g_malloc0(sizeof(struct dev_context));
 192         devc->profile = prof;
 193         devc->dev_state = IDLE;
 194         devc->timebase = DEFAULT_TIMEBASE;
 195         devc->ch1_enabled = TRUE;
 196         devc->ch2_enabled = TRUE;
 197         devc->voltage[0] = DEFAULT_VOLTAGE;
 198         devc->voltage[1] = DEFAULT_VOLTAGE;
 199         devc->coupling[0] = DEFAULT_COUPLING;
 200         devc->coupling[1] = DEFAULT_COUPLING;
 201         devc->voffset_ch1 = DEFAULT_VERT_OFFSET;
 202         devc->voffset_ch2 = DEFAULT_VERT_OFFSET;
 203         devc->voffset_trigger = DEFAULT_VERT_TRIGGERPOS;
 204         devc->framesize = DEFAULT_FRAMESIZE;
 205         devc->triggerslope = SLOPE_POSITIVE;
 206         devc->triggersource = g_strdup(DEFAULT_TRIGGER_SOURCE);
 207         devc->triggerposition = DEFAULT_HORIZ_TRIGGERPOS;
 208         sdi->priv = devc;
 209         drvc = di->priv;
 210         drvc->instances = g_slist_append(drvc->instances, sdi);
 211
 212         return sdi;
 213 }
 214
 215 static int configure_channels(const struct sr_dev_inst *sdi)
 216 {
 217         struct dev_context *devc;
 218         struct sr_channel *ch;
 219         const GSList *l;
 220         int p;
 221
 222         devc = sdi->priv;
 223
 224         g_slist_free(devc->enabled_channels);
 225         devc->ch1_enabled = devc->ch2_enabled = FALSE;
 226         for (l = sdi->channels, p = 0; l; l = l->next, p++) {
 227                 ch = l->data;
 228                 if (p == 0)
 229                         devc->ch1_enabled = ch->enabled;
 230                 else
 231                         devc->ch2_enabled = ch->enabled;
 232                 if (ch->enabled)
 233                         devc->enabled_channels = g_slist_append(devc->enabled_channels, ch);
 234         }
 235
 236         return SR_OK;
 237 }
 238
 239 static void clear_dev_context(void *priv)
 240 {
 241         struct dev_context *devc;
 242
 243         devc = priv;
 244         g_free(devc->triggersource);
 245         g_slist_free(devc->enabled_channels);
 246
 247 }
 248
 249 static int dev_clear(void)
 250 {
 251         return std_dev_clear(di, clear_dev_context);
 252 }
 253
 254 static int init(struct sr_context *sr_ctx)
 255 {
 256         return std_init(sr_ctx, di, LOG_PREFIX);
 257 }
 258
 259 static GSList *scan(GSList *options)
 260 {
 261         struct drv_context *drvc;
 262         struct dev_context *devc;
 263         struct sr_dev_inst *sdi;
 264         struct sr_usb_dev_inst *usb;
 265         struct sr_config *src;
 266         const struct dso_profile *prof;
 267         GSList *l, *devices, *conn_devices;
 268         struct libusb_device_descriptor des;
 269         libusb_device **devlist;
 270         int ret, i, j;
 271         const char *conn;
 272         char connection_id[64];
 273
 274         drvc = di->priv;
 275
 276         devices = 0;
 277
 278         conn = NULL;
 279         for (l = options; l; l = l->next) {
 280                 src = l->data;
 281                 if (src->key == SR_CONF_CONN) {
 282                         conn = g_variant_get_string(src->data, NULL);
 283                         break;
 284                 }
 285         }
 286         if (conn)
 287                 conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
 288         else
 289                 conn_devices = NULL;
 290
 291         /* Find all Hantek DSO devices and upload firmware to all of them. */
 292         libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
 293         for (i = 0; devlist[i]; i++) {
 294                 if (conn) {
 295                         usb = NULL;
 296                         for (l = conn_devices; l; l = l->next) {
 297                                 usb = l->data;
 298                                 if (usb->bus == libusb_get_bus_number(devlist[i])
 299                                         && usb->address == libusb_get_device_address(devlist[i]))
 300                                         break;
 301                         }
 302                         if (!l)
 303                                 /* This device matched none of the ones that
 304                                  * matched the conn specification. */
 305                                 continue;
 306                 }
 307
 308                 if ((ret = libusb_get_device_descriptor(devlist[i], &des))) {
 309                         sr_err("Failed to get device descriptor: %s.",
 310                                         libusb_error_name(ret));
 311                         continue;
 312                 }
 313
 314                 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
 315
 316                 prof = NULL;
 317                 for (j = 0; dev_profiles[j].orig_vid; j++) {
 318                         if (des.idVendor == dev_profiles[j].orig_vid
 319                                 && des.idProduct == dev_profiles[j].orig_pid) {
 320                                 /* Device matches the pre-firmware profile. */
 321                                 prof = &dev_profiles[j];
 322                                 sr_dbg("Found a %s %s.", prof->vendor, prof->model);
 323                                 sdi = dso_dev_new(prof);
 324                                 sdi->connection_id = g_strdup(connection_id);
 325                                 devices = g_slist_append(devices, sdi);
 326                                 devc = sdi->priv;
 327                                 if (ezusb_upload_firmware(devlist[i], USB_CONFIGURATION,
 328                                                 prof->firmware) == SR_OK)
 329                                         /* Remember when the firmware on this device was updated */
 330                                         devc->fw_updated = g_get_monotonic_time();
 331                                 else
 332                                         sr_err("Firmware upload failed");
 333                                 /* Dummy USB address of 0xff will get overwritten later. */
 334                                 sdi->conn = sr_usb_dev_inst_new(
 335                                                 libusb_get_bus_number(devlist[i]), 0xff, NULL);
 336                                 break;
 337                         } else if (des.idVendor == dev_profiles[j].fw_vid
 338                                 && des.idProduct == dev_profiles[j].fw_pid) {
 339                                 /* Device matches the post-firmware profile. */
 340                                 prof = &dev_profiles[j];
 341                                 sr_dbg("Found a %s %s.", prof->vendor, prof->model);
 342                                 sdi = dso_dev_new(prof);
 343                                 sdi->connection_id = g_strdup(connection_id);
 344                                 sdi->status = SR_ST_INACTIVE;
 345                                 devices = g_slist_append(devices, sdi);
 346                                 sdi->inst_type = SR_INST_USB;
 347                                 sdi->conn = sr_usb_dev_inst_new(
 348                                                 libusb_get_bus_number(devlist[i]),
 349                                                 libusb_get_device_address(devlist[i]), NULL);
 350                                 break;
 351                         }
 352                 }
 353                 if (!prof)
 354                         /* not a supported VID/PID */
 355                         continue;
 356         }
 357         libusb_free_device_list(devlist, 1);
 358
 359         return devices;
 360 }
 361
 362 static GSList *dev_list(void)
 363 {
 364         return ((struct drv_context *)(di->priv))->instances;
 365 }
 366
 367 static int dev_open(struct sr_dev_inst *sdi)
 368 {
 369         struct dev_context *devc;
 370         struct sr_usb_dev_inst *usb;
 371         int64_t timediff_us, timediff_ms;
 372         int err;
 373
 374         devc = sdi->priv;
 375         usb = sdi->conn;
 376
 377         /*
 378          * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
 379          * for the FX2 to renumerate.
 380          */
 381         err = SR_ERR;
 382         if (devc->fw_updated > 0) {
 383                 sr_info("Waiting for device to reset.");
 384                 /* Takes >= 300ms for the FX2 to be gone from the USB bus. */
 385                 g_usleep(300 * 1000);
 386                 timediff_ms = 0;
 387                 while (timediff_ms < MAX_RENUM_DELAY_MS) {
 388                         if ((err = dso_open(sdi)) == SR_OK)
 389                                 break;
 390                         g_usleep(100 * 1000);
 391                         timediff_us = g_get_monotonic_time() - devc->fw_updated;
 392                         timediff_ms = timediff_us / 1000;
 393                         sr_spew("Waited %" PRIi64 " ms.", timediff_ms);
 394                 }
 395                 sr_info("Device came back after %d ms.", timediff_ms);
 396         } else {
 397                 err = dso_open(sdi);
 398         }
 399
 400         if (err != SR_OK) {
 401                 sr_err("Unable to open device.");
 402                 return SR_ERR;
 403         }
 404
 405         err = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
 406         if (err != 0) {
 407                 sr_err("Unable to claim interface: %s.",
 408                            libusb_error_name(err));
 409                 return SR_ERR;
 410         }
 411
 412         return SR_OK;
 413 }
 414
 415 static int dev_close(struct sr_dev_inst *sdi)
 416 {
 417         dso_close(sdi);
 418
 419         return SR_OK;
 420 }
 421
 422 static int cleanup(void)
 423 {
 424         return dev_clear();
 425 }
 426
 427 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 428                 const struct sr_channel_group *cg)
 429 {
 430         struct dev_context *devc;
 431         struct sr_usb_dev_inst *usb;
 432         char str[128], *s;
 433         const uint64_t *vdiv;
 434         int ch_idx;
 435
 436         (void)cg;
 437
 438         switch (key) {
 439         case SR_CONF_NUM_TIMEBASE:
 440                 *data = g_variant_new_int32(NUM_TIMEBASE);
 441                 break;
 442         case SR_CONF_NUM_VDIV:
 443                 *data = g_variant_new_int32(NUM_VDIV);
 444                 break;
 445         }
 446
 447         if (!sdi)
 448                 return SR_ERR_ARG;
 449
 450         devc = sdi->priv;
 451         if (!cg) {
 452                 switch (key) {
 453                 case SR_CONF_CONN:
 454                         if (!sdi->conn)
 455                                 return SR_ERR_ARG;
 456                         usb = sdi->conn;
 457                         if (usb->address == 255)
 458                                 /* Device still needs to re-enumerate after firmware
 459                                  * upload, so we don't know its (future) address. */
 460                                 return SR_ERR;
 461                         snprintf(str, 128, "%d.%d", usb->bus, usb->address);
 462                         *data = g_variant_new_string(str);
 463                         break;
 464                 case SR_CONF_TIMEBASE:
 465                         *data = g_variant_new("(tt)", timebases[devc->timebase][0],
 466                                         timebases[devc->timebase][1]);
 467                         break;
 468                 case SR_CONF_BUFFERSIZE:
 469                         *data = g_variant_new_uint64(devc->framesize);
 470                         break;
 471                 case SR_CONF_TRIGGER_SOURCE:
 472                         *data = g_variant_new_string(devc->triggersource);
 473                         break;
 474                 case SR_CONF_TRIGGER_SLOPE:
 475                         if (devc->triggerslope == SLOPE_POSITIVE)
 476                                 s = "r";
 477                         else
 478                                 s = "f";
 479                         *data = g_variant_new_string(s);
 480                         break;
 481                 case SR_CONF_HORIZ_TRIGGERPOS:
 482                         *data = g_variant_new_double(devc->triggerposition);
 483                         break;
 484                 default:
 485                         return SR_ERR_NA;
 486                 }
 487         } else {
 488                 if (sdi->channel_groups->data == cg)
 489                         ch_idx = 0;
 490                 else if (sdi->channel_groups->next->data == cg)
 491                         ch_idx = 1;
 492                 else
 493                         return SR_ERR_ARG;
 494                 switch(key) {
 495                 case SR_CONF_FILTER:
 496                         *data = g_variant_new_boolean(devc->filter[ch_idx]);
 497                         break;
 498                 case SR_CONF_VDIV:
 499                         vdiv = vdivs[devc->voltage[ch_idx]];
 500                         *data = g_variant_new("(tt)", vdiv[0], vdiv[1]);
 501                         break;
 502                 case SR_CONF_COUPLING:
 503                         *data = g_variant_new_string(coupling[devc->coupling[ch_idx]]);
 504                         break;
 505                 }
 506         }
 507
 508         return SR_OK;
 509 }
 510
 511 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 512                 const struct sr_channel_group *cg)
 513 {
 514         struct dev_context *devc;
 515         double tmp_double;
 516         uint64_t tmp_u64, p, q;
 517         int tmp_int, ch_idx, ret;
 518         unsigned int i;
 519         const char *tmp_str;
 520
 521         if (sdi->status != SR_ST_ACTIVE)
 522                 return SR_ERR_DEV_CLOSED;
 523
 524         ret = SR_OK;
 525         devc = sdi->priv;
 526         if (!cg) {
 527                 switch (key) {
 528                 case SR_CONF_LIMIT_FRAMES:
 529                         devc->limit_frames = g_variant_get_uint64(data);
 530                         break;
 531                 case SR_CONF_TRIGGER_SLOPE:
 532                         tmp_str = g_variant_get_string(data, NULL);
 533                         if (!tmp_str || !(tmp_str[0] == 'f' || tmp_str[0] == 'r'))
 534                                 return SR_ERR_ARG;
 535                         devc->triggerslope = (tmp_str[0] == 'r')
 536                                 ? SLOPE_POSITIVE : SLOPE_NEGATIVE;
 537                         break;
 538                 case SR_CONF_HORIZ_TRIGGERPOS:
 539                         tmp_double = g_variant_get_double(data);
 540                         if (tmp_double < 0.0 || tmp_double > 1.0) {
 541                                 sr_err("Trigger position should be between 0.0 and 1.0.");
 542                                 ret = SR_ERR_ARG;
 543                         } else
 544                                 devc->triggerposition = tmp_double;
 545                         break;
 546                 case SR_CONF_BUFFERSIZE:
 547                         tmp_u64 = g_variant_get_uint64(data);
 548                         for (i = 0; i < 2; i++) {
 549                                 if (devc->profile->buffersizes[i] == tmp_u64) {
 550                                         devc->framesize = tmp_u64;
 551                                         break;
 552                                 }
 553                         }
 554                         if (i == 2)
 555                                 ret = SR_ERR_ARG;
 556                         break;
 557                 case SR_CONF_TIMEBASE:
 558                         g_variant_get(data, "(tt)", &p, &q);
 559                         tmp_int = -1;
 560                         for (i = 0; i < ARRAY_SIZE(timebases); i++) {
 561                                 if (timebases[i][0] == p && timebases[i][1] == q) {
 562                                         tmp_int = i;
 563                                         break;
 564                                 }
 565                         }
 566                         if (tmp_int >= 0)
 567                                 devc->timebase = tmp_int;
 568                         else
 569                                 ret = SR_ERR_ARG;
 570                         break;
 571                 case SR_CONF_TRIGGER_SOURCE:
 572                         tmp_str = g_variant_get_string(data, NULL);
 573                         for (i = 0; trigger_sources[i]; i++) {
 574                                 if (!strcmp(tmp_str, trigger_sources[i])) {
 575                                         devc->triggersource = g_strdup(tmp_str);
 576                                         break;
 577                                 }
 578                         }
 579                         if (trigger_sources[i] == 0)
 580                                 ret = SR_ERR_ARG;
 581                         break;
 582                 default:
 583                         ret = SR_ERR_NA;
 584                         break;
 585                 }
 586         } else {
 587                 if (sdi->channel_groups->data == cg)
 588                         ch_idx = 0;
 589                 else if (sdi->channel_groups->next->data == cg)
 590                         ch_idx = 1;
 591                 else
 592                         return SR_ERR_ARG;
 593                 switch (key) {
 594                 case SR_CONF_FILTER:
 595                         devc->filter[ch_idx] = g_variant_get_boolean(data);
 596                         break;
 597                 case SR_CONF_VDIV:
 598                         g_variant_get(data, "(tt)", &p, &q);
 599                         tmp_int = -1;
 600                         for (i = 0; i < ARRAY_SIZE(vdivs); i++) {
 601                                 if (vdivs[i][0] == p && vdivs[i][1] == q) {
 602                                         tmp_int = i;
 603                                         break;
 604                                 }
 605                         }
 606                         if (tmp_int >= 0) {
 607                                 devc->voltage[ch_idx] = tmp_int;
 608                         } else
 609                                 ret = SR_ERR_ARG;
 610                         break;
 611                 case SR_CONF_COUPLING:
 612                         tmp_str = g_variant_get_string(data, NULL);
 613                         for (i = 0; coupling[i]; i++) {
 614                                 if (!strcmp(tmp_str, coupling[i])) {
 615                                         devc->coupling[ch_idx] = i;
 616                                         break;
 617                                 }
 618                         }
 619                         if (coupling[i] == 0)
 620                                 ret = SR_ERR_ARG;
 621                         break;
 622                 default:
 623                         ret = SR_ERR_NA;
 624                         break;
 625                 }
 626         }
 627
 628         return ret;
 629 }
 630
 631 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 632                 const struct sr_channel_group *cg)
 633 {
 634         struct dev_context *devc;
 635         GVariant *tuple, *rational[2];
 636         GVariantBuilder gvb;
 637         unsigned int i;
 638
 639         if (key == SR_CONF_SCAN_OPTIONS) {
 640                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 641                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 642                 return SR_OK;
 643         } else if (key == SR_CONF_DEVICE_OPTIONS && !sdi) {
 644                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 645                                 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 646                 return SR_OK;
 647         }
 648
 649         if (!sdi)
 650                 return SR_ERR_ARG;
 651
 652         if (!cg) {
 653         switch (key) {
 654                 case SR_CONF_DEVICE_OPTIONS:
 655                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 656                                         devopts_global, ARRAY_SIZE(devopts_global), sizeof(uint32_t));
 657                         break;
 658                 case SR_CONF_BUFFERSIZE:
 659                         if (!sdi)
 660                                 return SR_ERR_ARG;
 661                         devc = sdi->priv;
 662                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT64,
 663                                         devc->profile->buffersizes, 2, sizeof(uint64_t));
 664                         break;
 665                 case SR_CONF_TIMEBASE:
 666                         g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 667                         for (i = 0; i < ARRAY_SIZE(timebases); i++) {
 668                                 rational[0] = g_variant_new_uint64(timebases[i][0]);
 669                                 rational[1] = g_variant_new_uint64(timebases[i][1]);
 670                                 tuple = g_variant_new_tuple(rational, 2);
 671                                 g_variant_builder_add_value(&gvb, tuple);
 672                         }
 673                         *data = g_variant_builder_end(&gvb);
 674                         break;
 675                 case SR_CONF_TRIGGER_SOURCE:
 676                         *data = g_variant_new_strv(trigger_sources,
 677                                         ARRAY_SIZE(trigger_sources));
 678                         break;
 679                 case SR_CONF_TRIGGER_SLOPE:
 680                         *data = g_variant_new_strv(trigger_slopes,
 681                                         ARRAY_SIZE(trigger_slopes));
 682                         break;
 683                 default:
 684                         return SR_ERR_NA;
 685                 }
 686         } else {
 687         switch (key) {
 688                 case SR_CONF_DEVICE_OPTIONS:
 689                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 690                                         devopts_cg, ARRAY_SIZE(devopts_cg), sizeof(uint32_t));
 691                         break;
 692                 case SR_CONF_COUPLING:
 693                         *data = g_variant_new_strv(coupling, ARRAY_SIZE(coupling));
 694                         break;
 695                 case SR_CONF_VDIV:
 696                         g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 697                         for (i = 0; i < ARRAY_SIZE(vdivs); i++) {
 698                                 rational[0] = g_variant_new_uint64(vdivs[i][0]);
 699                                 rational[1] = g_variant_new_uint64(vdivs[i][1]);
 700                                 tuple = g_variant_new_tuple(rational, 2);
 701                                 g_variant_builder_add_value(&gvb, tuple);
 702                         }
 703                         *data = g_variant_builder_end(&gvb);
 704                         break;
 705                 default:
 706                         return SR_ERR_NA;
 707                 }
 708         }
 709
 710         return SR_OK;
 711 }
 712
 713 static void send_chunk(struct sr_dev_inst *sdi, unsigned char *buf,
 714                 int num_samples)
 715 {
 716         struct sr_datafeed_packet packet;
 717         struct sr_datafeed_analog analog;
 718         struct dev_context *devc;
 719         float ch1, ch2, range;
 720         int num_channels, data_offset, i;
 721
 722         devc = sdi->priv;
 723         num_channels = (devc->ch1_enabled && devc->ch2_enabled) ? 2 : 1;
 724         packet.type = SR_DF_ANALOG;
 725         packet.payload = &analog;
 726         /* TODO: support for 5xxx series 9-bit samples */
 727         analog.channels = devc->enabled_channels;
 728         analog.num_samples = num_samples;
 729         analog.mq = SR_MQ_VOLTAGE;
 730         analog.unit = SR_UNIT_VOLT;
 731         analog.mqflags = 0;
 732         /* TODO: Check malloc return value. */
 733         analog.data = g_try_malloc(analog.num_samples * sizeof(float) * num_channels);
 734         data_offset = 0;
 735         for (i = 0; i < analog.num_samples; i++) {
 736                 /*
 737                  * The device always sends data for both channels. If a channel
 738                  * is disabled, it contains a copy of the enabled channel's
 739                  * data. However, we only send the requested channels to
 740                  * the bus.
 741                  *
 742                  * Voltage values are encoded as a value 0-255 (0-512 on the
 743                  * DSO-5200*), where the value is a point in the range
 744                  * represented by the vdiv setting. There are 8 vertical divs,
 745                  * so e.g. 500mV/div represents 4V peak-to-peak where 0 = -2V
 746                  * and 255 = +2V.
 747                  */
 748                 /* TODO: Support for DSO-5xxx series 9-bit samples. */
 749                 if (devc->ch1_enabled) {
 750                         range = ((float)vdivs[devc->voltage[0]][0] / vdivs[devc->voltage[0]][1]) * 8;
 751                         ch1 = range / 255 * *(buf + i * 2 + 1);
 752                         /* Value is centered around 0V. */
 753                         ch1 -= range / 2;
 754                         analog.data[data_offset++] = ch1;
 755                 }
 756                 if (devc->ch2_enabled) {
 757                         range = ((float)vdivs[devc->voltage[1]][0] / vdivs[devc->voltage[1]][1]) * 8;
 758                         ch2 = range / 255 * *(buf + i * 2);
 759                         ch2 -= range / 2;
 760                         analog.data[data_offset++] = ch2;
 761                 }
 762         }
 763         sr_session_send(devc->cb_data, &packet);
 764 }
 765
 766 /*
 767  * Called by libusb (as triggered by handle_event()) when a transfer comes in.
 768  * Only channel data comes in asynchronously, and all transfers for this are
 769  * queued up beforehand, so this just needs to chuck the incoming data onto
 770  * the libsigrok session bus.
 771  */
 772 static void receive_transfer(struct libusb_transfer *transfer)
 773 {
 774         struct sr_datafeed_packet packet;
 775         struct sr_dev_inst *sdi;
 776         struct dev_context *devc;
 777         int num_samples, pre;
 778
 779         sdi = transfer->user_data;
 780         devc = sdi->priv;
 781         sr_spew("receive_transfer(): status %d received %d bytes.",
 782                    transfer->status, transfer->actual_length);
 783
 784         if (transfer->actual_length == 0)
 785                 /* Nothing to send to the bus. */
 786                 return;
 787
 788         num_samples = transfer->actual_length / 2;
 789
 790         sr_spew("Got %d-%d/%d samples in frame.", devc->samp_received + 1,
 791                    devc->samp_received + num_samples, devc->framesize);
 792
 793         /*
 794          * The device always sends a full frame, but the beginning of the frame
 795          * doesn't represent the trigger point. The offset at which the trigger
 796          * happened came in with the capture state, so we need to start sending
 797          * from there up the session bus. The samples in the frame buffer
 798          * before that trigger point came after the end of the device's frame
 799          * buffer was reached, and it wrapped around to overwrite up until the
 800          * trigger point.
 801          */
 802         if (devc->samp_received < devc->trigger_offset) {
 803                 /* Trigger point not yet reached. */
 804                 if (devc->samp_received + num_samples < devc->trigger_offset) {
 805                         /* The entire chunk is before the trigger point. */
 806                         memcpy(devc->framebuf + devc->samp_buffered * 2,
 807                                         transfer->buffer, num_samples * 2);
 808                         devc->samp_buffered += num_samples;
 809                 } else {
 810                         /*
 811                          * This chunk hits or overruns the trigger point.
 812                          * Store the part before the trigger fired, and
 813                          * send the rest up to the session bus.
 814                          */
 815                         pre = devc->trigger_offset - devc->samp_received;
 816                         memcpy(devc->framebuf + devc->samp_buffered * 2,
 817                                         transfer->buffer, pre * 2);
 818                         devc->samp_buffered += pre;
 819
 820                         /* The rest of this chunk starts with the trigger point. */
 821                         sr_dbg("Reached trigger point, %d samples buffered.",
 822                                    devc->samp_buffered);
 823
 824                         /* Avoid the corner case where the chunk ended at
 825                          * exactly the trigger point. */
 826                         if (num_samples > pre)
 827                                 send_chunk(sdi, transfer->buffer + pre * 2,
 828                                                 num_samples - pre);
 829                 }
 830         } else {
 831                 /* Already past the trigger point, just send it all out. */
 832                 send_chunk(sdi, transfer->buffer,
 833                                 num_samples);
 834         }
 835
 836         devc->samp_received += num_samples;
 837
 838         /* Everything in this transfer was either copied to the buffer or
 839          * sent to the session bus. */
 840         g_free(transfer->buffer);
 841         libusb_free_transfer(transfer);
 842
 843         if (devc->samp_received >= devc->framesize) {
 844                 /* That was the last chunk in this frame. Send the buffered
 845                  * pre-trigger samples out now, in one big chunk. */
 846                 sr_dbg("End of frame, sending %d pre-trigger buffered samples.",
 847                            devc->samp_buffered);
 848                 send_chunk(sdi, devc->framebuf, devc->samp_buffered);
 849
 850                 /* Mark the end of this frame. */
 851                 packet.type = SR_DF_FRAME_END;
 852                 sr_session_send(devc->cb_data, &packet);
 853
 854                 if (devc->limit_frames && ++devc->num_frames == devc->limit_frames) {
 855                         /* Terminate session */
 856                         devc->dev_state = STOPPING;
 857                 } else {
 858                         devc->dev_state = NEW_CAPTURE;
 859                 }
 860         }
 861 }
 862
 863 static int handle_event(int fd, int revents, void *cb_data)
 864 {
 865         const struct sr_dev_inst *sdi;
 866         struct sr_datafeed_packet packet;
 867         struct timeval tv;
 868         struct dev_context *devc;
 869         struct drv_context *drvc = di->priv;
 870         int num_channels;
 871         uint32_t trigger_offset;
 872         uint8_t capturestate;
 873
 874         (void)fd;
 875         (void)revents;
 876
 877         sdi = cb_data;
 878         devc = sdi->priv;
 879         if (devc->dev_state == STOPPING) {
 880                 /* We've been told to wind up the acquisition. */
 881                 sr_dbg("Stopping acquisition.");
 882                 /*
 883                  * TODO: Doesn't really cancel pending transfers so they might
 884                  * come in after SR_DF_END is sent.
 885                  */
 886                 usb_source_remove(sdi->session, drvc->sr_ctx);
 887
 888                 packet.type = SR_DF_END;
 889                 sr_session_send(sdi, &packet);
 890
 891                 devc->dev_state = IDLE;
 892
 893                 return TRUE;
 894         }
 895
 896         /* Always handle pending libusb events. */
 897         tv.tv_sec = tv.tv_usec = 0;
 898         libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
 899
 900         /* TODO: ugh */
 901         if (devc->dev_state == NEW_CAPTURE) {
 902                 if (dso_capture_start(sdi) != SR_OK)
 903                         return TRUE;
 904                 if (dso_enable_trigger(sdi) != SR_OK)
 905                         return TRUE;
 906 //              if (dso_force_trigger(sdi) != SR_OK)
 907 //                      return TRUE;
 908                 sr_dbg("Successfully requested next chunk.");
 909                 devc->dev_state = CAPTURE;
 910                 return TRUE;
 911         }
 912         if (devc->dev_state != CAPTURE)
 913                 return TRUE;
 914
 915         if ((dso_get_capturestate(sdi, &capturestate, &trigger_offset)) != SR_OK)
 916                 return TRUE;
 917
 918         sr_dbg("Capturestate %d.", capturestate);
 919         sr_dbg("Trigger offset 0x%.6x.", trigger_offset);
 920         switch (capturestate) {
 921         case CAPTURE_EMPTY:
 922                 if (++devc->capture_empty_count >= MAX_CAPTURE_EMPTY) {
 923                         devc->capture_empty_count = 0;
 924                         if (dso_capture_start(sdi) != SR_OK)
 925                                 break;
 926                         if (dso_enable_trigger(sdi) != SR_OK)
 927                                 break;
 928 //                      if (dso_force_trigger(sdi) != SR_OK)
 929 //                              break;
 930                         sr_dbg("Successfully requested next chunk.");
 931                 }
 932                 break;
 933         case CAPTURE_FILLING:
 934                 /* No data yet. */
 935                 break;
 936         case CAPTURE_READY_8BIT:
 937                 /* Remember where in the captured frame the trigger is. */
 938                 devc->trigger_offset = trigger_offset;
 939
 940                 num_channels = (devc->ch1_enabled && devc->ch2_enabled) ? 2 : 1;
 941                 /* TODO: Check malloc return value. */
 942                 devc->framebuf = g_try_malloc(devc->framesize * num_channels * 2);
 943                 devc->samp_buffered = devc->samp_received = 0;
 944
 945                 /* Tell the scope to send us the first frame. */
 946                 if (dso_get_channeldata(sdi, receive_transfer) != SR_OK)
 947                         break;
 948
 949                 /*
 950                  * Don't hit the state machine again until we're done fetching
 951                  * the data we just told the scope to send.
 952                  */
 953                 devc->dev_state = FETCH_DATA;
 954
 955                 /* Tell the frontend a new frame is on the way. */
 956                 packet.type = SR_DF_FRAME_BEGIN;
 957                 sr_session_send(sdi, &packet);
 958                 break;
 959         case CAPTURE_READY_9BIT:
 960                 /* TODO */
 961                 sr_err("Not yet supported.");
 962                 break;
 963         case CAPTURE_TIMEOUT:
 964                 /* Doesn't matter, we'll try again next time. */
 965                 break;
 966         default:
 967                 sr_dbg("Unknown capture state: %d.", capturestate);
 968                 break;
 969         }
 970
 971         return TRUE;
 972 }
 973
 974 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 975 {
 976         struct dev_context *devc;
 977         struct drv_context *drvc = di->priv;
 978
 979         if (sdi->status != SR_ST_ACTIVE)
 980                 return SR_ERR_DEV_CLOSED;
 981
 982         devc = sdi->priv;
 983         devc->cb_data = cb_data;
 984
 985         if (configure_channels(sdi) != SR_OK) {
 986                 sr_err("Failed to configure channels.");
 987                 return SR_ERR;
 988         }
 989
 990         if (dso_init(sdi) != SR_OK)
 991                 return SR_ERR;
 992
 993         if (dso_capture_start(sdi) != SR_OK)
 994                 return SR_ERR;
 995
 996         devc->dev_state = CAPTURE;
 997         usb_source_add(sdi->session, drvc->sr_ctx, TICK, handle_event, (void *)sdi);
 998
 999         /* Send header packet to the session bus. */
1000         std_session_send_df_header(cb_data, LOG_PREFIX);
1001
1002         return SR_OK;
1003 }
1004
1005 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
1006 {
1007         struct dev_context *devc;
1008
1009         (void)cb_data;
1010
1011         if (sdi->status != SR_ST_ACTIVE)
1012                 return SR_ERR;
1013
1014         devc = sdi->priv;
1015         devc->dev_state = STOPPING;
1016
1017         return SR_OK;
1018 }
1019
1020 SR_PRIV struct sr_dev_driver hantek_dso_driver_info = {
1021         .name = "hantek-dso",
1022         .longname = "Hantek DSO",
1023         .api_version = 1,
1024         .init = init,
1025         .cleanup = cleanup,
1026         .scan = scan,
1027         .dev_list = dev_list,
1028         .dev_clear = dev_clear,
1029         .config_get = config_get,
1030         .config_set = config_set,
1031         .config_list = config_list,
1032         .dev_open = dev_open,
1033         .dev_close = dev_close,
1034         .dev_acquisition_start = dev_acquisition_start,
1035         .dev_acquisition_stop = dev_acquisition_stop,
1036         .priv = NULL,
1037 };