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 drvopts[] = {
  48         SR_CONF_OSCILLOSCOPE,
  49 };
  50
  51 static const uint32_t devopts[] = {
  52         SR_CONF_CONTINUOUS | SR_CONF_SET,
  53         SR_CONF_LIMIT_FRAMES | SR_CONF_SET,
  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_HDIV | 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
 163 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data);
 164
 165 static struct sr_dev_inst *dso_dev_new(const struct dso_profile *prof)
 166 {
 167         struct sr_dev_inst *sdi;
 168         struct sr_channel *ch;
 169         struct sr_channel_group *cg;
 170         struct drv_context *drvc;
 171         struct dev_context *devc;
 172         int i;
 173
 174         sdi = g_malloc0(sizeof(struct sr_dev_inst));
 175         sdi->status = SR_ST_INITIALIZING;
 176         sdi->vendor = g_strdup(prof->vendor);
 177         sdi->model = g_strdup(prof->model);
 178         sdi->driver = &hantek_dso_driver_info;
 179
 180         /*
 181          * Add only the real channels -- EXT isn't a source of data, only
 182          * a trigger source internal to the device.
 183          */
 184         for (i = 0; channel_names[i]; i++) {
 185                 ch = sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, TRUE, channel_names[i]);
 186                 cg = g_malloc0(sizeof(struct sr_channel_group));
 187                 cg->name = g_strdup(channel_names[i]);
 188                 cg->channels = g_slist_append(cg->channels, ch);
 189                 sdi->channel_groups = g_slist_append(sdi->channel_groups, cg);
 190         }
 191
 192         devc = g_malloc0(sizeof(struct dev_context));
 193         devc->profile = prof;
 194         devc->dev_state = IDLE;
 195         devc->timebase = DEFAULT_TIMEBASE;
 196         devc->ch1_enabled = TRUE;
 197         devc->ch2_enabled = TRUE;
 198         devc->voltage[0] = DEFAULT_VOLTAGE;
 199         devc->voltage[1] = DEFAULT_VOLTAGE;
 200         devc->coupling[0] = DEFAULT_COUPLING;
 201         devc->coupling[1] = DEFAULT_COUPLING;
 202         devc->voffset_ch1 = DEFAULT_VERT_OFFSET;
 203         devc->voffset_ch2 = DEFAULT_VERT_OFFSET;
 204         devc->voffset_trigger = DEFAULT_VERT_TRIGGERPOS;
 205         devc->framesize = DEFAULT_FRAMESIZE;
 206         devc->triggerslope = SLOPE_POSITIVE;
 207         devc->triggersource = g_strdup(DEFAULT_TRIGGER_SOURCE);
 208         devc->triggerposition = DEFAULT_HORIZ_TRIGGERPOS;
 209         sdi->priv = devc;
 210         drvc = hantek_dso_driver_info.priv;
 211         drvc->instances = g_slist_append(drvc->instances, sdi);
 212
 213         return sdi;
 214 }
 215
 216 static int configure_channels(const struct sr_dev_inst *sdi)
 217 {
 218         struct dev_context *devc;
 219         struct sr_channel *ch;
 220         const GSList *l;
 221         int p;
 222
 223         devc = sdi->priv;
 224
 225         g_slist_free(devc->enabled_channels);
 226         devc->ch1_enabled = devc->ch2_enabled = FALSE;
 227         for (l = sdi->channels, p = 0; l; l = l->next, p++) {
 228                 ch = l->data;
 229                 if (p == 0)
 230                         devc->ch1_enabled = ch->enabled;
 231                 else
 232                         devc->ch2_enabled = ch->enabled;
 233                 if (ch->enabled)
 234                         devc->enabled_channels = g_slist_append(devc->enabled_channels, ch);
 235         }
 236
 237         return SR_OK;
 238 }
 239
 240 static void clear_dev_context(void *priv)
 241 {
 242         struct dev_context *devc;
 243
 244         devc = priv;
 245         g_free(devc->triggersource);
 246         g_slist_free(devc->enabled_channels);
 247
 248 }
 249
 250 static int dev_clear(const struct sr_dev_driver *di)
 251 {
 252         return std_dev_clear(di, clear_dev_context);
 253 }
 254
 255 static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx)
 256 {
 257         return std_init(sr_ctx, di, LOG_PREFIX);
 258 }
 259
 260 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 261 {
 262         struct drv_context *drvc;
 263         struct dev_context *devc;
 264         struct sr_dev_inst *sdi;
 265         struct sr_usb_dev_inst *usb;
 266         struct sr_config *src;
 267         const struct dso_profile *prof;
 268         GSList *l, *devices, *conn_devices;
 269         struct libusb_device_descriptor des;
 270         libusb_device **devlist;
 271         int ret, i, j;
 272         const char *conn;
 273         char connection_id[64];
 274
 275         drvc = di->priv;
 276
 277         devices = 0;
 278
 279         conn = NULL;
 280         for (l = options; l; l = l->next) {
 281                 src = l->data;
 282                 if (src->key == SR_CONF_CONN) {
 283                         conn = g_variant_get_string(src->data, NULL);
 284                         break;
 285                 }
 286         }
 287         if (conn)
 288                 conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
 289         else
 290                 conn_devices = NULL;
 291
 292         /* Find all Hantek DSO devices and upload firmware to all of them. */
 293         libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
 294         for (i = 0; devlist[i]; i++) {
 295                 if (conn) {
 296                         usb = NULL;
 297                         for (l = conn_devices; l; l = l->next) {
 298                                 usb = l->data;
 299                                 if (usb->bus == libusb_get_bus_number(devlist[i])
 300                                         && usb->address == libusb_get_device_address(devlist[i]))
 301                                         break;
 302                         }
 303                         if (!l)
 304                                 /* This device matched none of the ones that
 305                                  * matched the conn specification. */
 306                                 continue;
 307                 }
 308
 309                 if ((ret = libusb_get_device_descriptor(devlist[i], &des))) {
 310                         sr_err("Failed to get device descriptor: %s.",
 311                                         libusb_error_name(ret));
 312                         continue;
 313                 }
 314
 315                 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
 316
 317                 prof = NULL;
 318                 for (j = 0; dev_profiles[j].orig_vid; j++) {
 319                         if (des.idVendor == dev_profiles[j].orig_vid
 320                                 && des.idProduct == dev_profiles[j].orig_pid) {
 321                                 /* Device matches the pre-firmware profile. */
 322                                 prof = &dev_profiles[j];
 323                                 sr_dbg("Found a %s %s.", prof->vendor, prof->model);
 324                                 sdi = dso_dev_new(prof);
 325                                 sdi->connection_id = g_strdup(connection_id);
 326                                 devices = g_slist_append(devices, sdi);
 327                                 devc = sdi->priv;
 328                                 if (ezusb_upload_firmware(devlist[i], USB_CONFIGURATION,
 329                                                 prof->firmware) == SR_OK)
 330                                         /* Remember when the firmware on this device was updated */
 331                                         devc->fw_updated = g_get_monotonic_time();
 332                                 else
 333                                         sr_err("Firmware upload failed");
 334                                 /* Dummy USB address of 0xff will get overwritten later. */
 335                                 sdi->conn = sr_usb_dev_inst_new(
 336                                                 libusb_get_bus_number(devlist[i]), 0xff, NULL);
 337                                 break;
 338                         } else if (des.idVendor == dev_profiles[j].fw_vid
 339                                 && des.idProduct == dev_profiles[j].fw_pid) {
 340                                 /* Device matches the post-firmware profile. */
 341                                 prof = &dev_profiles[j];
 342                                 sr_dbg("Found a %s %s.", prof->vendor, prof->model);
 343                                 sdi = dso_dev_new(prof);
 344                                 sdi->connection_id = g_strdup(connection_id);
 345                                 sdi->status = SR_ST_INACTIVE;
 346                                 devices = g_slist_append(devices, sdi);
 347                                 sdi->inst_type = SR_INST_USB;
 348                                 sdi->conn = sr_usb_dev_inst_new(
 349                                                 libusb_get_bus_number(devlist[i]),
 350                                                 libusb_get_device_address(devlist[i]), NULL);
 351                                 break;
 352                         }
 353                 }
 354                 if (!prof)
 355                         /* not a supported VID/PID */
 356                         continue;
 357         }
 358         libusb_free_device_list(devlist, 1);
 359
 360         return devices;
 361 }
 362
 363 static GSList *dev_list(const struct sr_dev_driver *di)
 364 {
 365         return ((struct drv_context *)(di->priv))->instances;
 366 }
 367
 368 static int dev_open(struct sr_dev_inst *sdi)
 369 {
 370         struct dev_context *devc;
 371         struct sr_usb_dev_inst *usb;
 372         int64_t timediff_us, timediff_ms;
 373         int err;
 374
 375         devc = sdi->priv;
 376         usb = sdi->conn;
 377
 378         /*
 379          * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
 380          * for the FX2 to renumerate.
 381          */
 382         err = SR_ERR;
 383         if (devc->fw_updated > 0) {
 384                 sr_info("Waiting for device to reset.");
 385                 /* Takes >= 300ms for the FX2 to be gone from the USB bus. */
 386                 g_usleep(300 * 1000);
 387                 timediff_ms = 0;
 388                 while (timediff_ms < MAX_RENUM_DELAY_MS) {
 389                         if ((err = dso_open(sdi)) == SR_OK)
 390                                 break;
 391                         g_usleep(100 * 1000);
 392                         timediff_us = g_get_monotonic_time() - devc->fw_updated;
 393                         timediff_ms = timediff_us / 1000;
 394                         sr_spew("Waited %" PRIi64 " ms.", timediff_ms);
 395                 }
 396                 sr_info("Device came back after %d ms.", timediff_ms);
 397         } else {
 398                 err = dso_open(sdi);
 399         }
 400
 401         if (err != SR_OK) {
 402                 sr_err("Unable to open device.");
 403                 return SR_ERR;
 404         }
 405
 406         err = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
 407         if (err != 0) {
 408                 sr_err("Unable to claim interface: %s.",
 409                            libusb_error_name(err));
 410                 return SR_ERR;
 411         }
 412
 413         return SR_OK;
 414 }
 415
 416 static int dev_close(struct sr_dev_inst *sdi)
 417 {
 418         dso_close(sdi);
 419
 420         return SR_OK;
 421 }
 422
 423 static int cleanup(const struct sr_dev_driver *di)
 424 {
 425         return dev_clear(di);
 426 }
 427
 428 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 429                 const struct sr_channel_group *cg)
 430 {
 431         struct dev_context *devc;
 432         struct sr_usb_dev_inst *usb;
 433         char str[128], *s;
 434         const uint64_t *vdiv;
 435         int ch_idx;
 436
 437         (void)cg;
 438
 439         switch (key) {
 440         case SR_CONF_NUM_HDIV:
 441                 *data = g_variant_new_int32(NUM_TIMEBASE);
 442                 break;
 443         case SR_CONF_NUM_VDIV:
 444                 *data = g_variant_new_int32(NUM_VDIV);
 445                 break;
 446         }
 447
 448         if (!sdi)
 449                 return SR_ERR_ARG;
 450
 451         devc = sdi->priv;
 452         if (!cg) {
 453                 switch (key) {
 454                 case SR_CONF_CONN:
 455                         if (!sdi->conn)
 456                                 return SR_ERR_ARG;
 457                         usb = sdi->conn;
 458                         if (usb->address == 255)
 459                                 /* Device still needs to re-enumerate after firmware
 460                                  * upload, so we don't know its (future) address. */
 461                                 return SR_ERR;
 462                         snprintf(str, 128, "%d.%d", usb->bus, usb->address);
 463                         *data = g_variant_new_string(str);
 464                         break;
 465                 case SR_CONF_TIMEBASE:
 466                         *data = g_variant_new("(tt)", timebases[devc->timebase][0],
 467                                         timebases[devc->timebase][1]);
 468                         break;
 469                 case SR_CONF_BUFFERSIZE:
 470                         *data = g_variant_new_uint64(devc->framesize);
 471                         break;
 472                 case SR_CONF_TRIGGER_SOURCE:
 473                         *data = g_variant_new_string(devc->triggersource);
 474                         break;
 475                 case SR_CONF_TRIGGER_SLOPE:
 476                         if (devc->triggerslope == SLOPE_POSITIVE)
 477                                 s = "r";
 478                         else
 479                                 s = "f";
 480                         *data = g_variant_new_string(s);
 481                         break;
 482                 case SR_CONF_HORIZ_TRIGGERPOS:
 483                         *data = g_variant_new_double(devc->triggerposition);
 484                         break;
 485                 default:
 486                         return SR_ERR_NA;
 487                 }
 488         } else {
 489                 if (sdi->channel_groups->data == cg)
 490                         ch_idx = 0;
 491                 else if (sdi->channel_groups->next->data == cg)
 492                         ch_idx = 1;
 493                 else
 494                         return SR_ERR_ARG;
 495                 switch(key) {
 496                 case SR_CONF_FILTER:
 497                         *data = g_variant_new_boolean(devc->filter[ch_idx]);
 498                         break;
 499                 case SR_CONF_VDIV:
 500                         vdiv = vdivs[devc->voltage[ch_idx]];
 501                         *data = g_variant_new("(tt)", vdiv[0], vdiv[1]);
 502                         break;
 503                 case SR_CONF_COUPLING:
 504                         *data = g_variant_new_string(coupling[devc->coupling[ch_idx]]);
 505                         break;
 506                 }
 507         }
 508
 509         return SR_OK;
 510 }
 511
 512 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 513                 const struct sr_channel_group *cg)
 514 {
 515         struct dev_context *devc;
 516         double tmp_double;
 517         uint64_t tmp_u64, p, q;
 518         int tmp_int, ch_idx, ret;
 519         unsigned int i;
 520         const char *tmp_str;
 521
 522         if (sdi->status != SR_ST_ACTIVE)
 523                 return SR_ERR_DEV_CLOSED;
 524
 525         ret = SR_OK;
 526         devc = sdi->priv;
 527         if (!cg) {
 528                 switch (key) {
 529                 case SR_CONF_LIMIT_FRAMES:
 530                         devc->limit_frames = g_variant_get_uint64(data);
 531                         break;
 532                 case SR_CONF_TRIGGER_SLOPE:
 533                         tmp_str = g_variant_get_string(data, NULL);
 534                         if (!tmp_str || !(tmp_str[0] == 'f' || tmp_str[0] == 'r'))
 535                                 return SR_ERR_ARG;
 536                         devc->triggerslope = (tmp_str[0] == 'r')
 537                                 ? SLOPE_POSITIVE : SLOPE_NEGATIVE;
 538                         break;
 539                 case SR_CONF_HORIZ_TRIGGERPOS:
 540                         tmp_double = g_variant_get_double(data);
 541                         if (tmp_double < 0.0 || tmp_double > 1.0) {
 542                                 sr_err("Trigger position should be between 0.0 and 1.0.");
 543                                 ret = SR_ERR_ARG;
 544                         } else
 545                                 devc->triggerposition = tmp_double;
 546                         break;
 547                 case SR_CONF_BUFFERSIZE:
 548                         tmp_u64 = g_variant_get_uint64(data);
 549                         for (i = 0; i < 2; i++) {
 550                                 if (devc->profile->buffersizes[i] == tmp_u64) {
 551                                         devc->framesize = tmp_u64;
 552                                         break;
 553                                 }
 554                         }
 555                         if (i == 2)
 556                                 ret = SR_ERR_ARG;
 557                         break;
 558                 case SR_CONF_TIMEBASE:
 559                         g_variant_get(data, "(tt)", &p, &q);
 560                         tmp_int = -1;
 561                         for (i = 0; i < ARRAY_SIZE(timebases); i++) {
 562                                 if (timebases[i][0] == p && timebases[i][1] == q) {
 563                                         tmp_int = i;
 564                                         break;
 565                                 }
 566                         }
 567                         if (tmp_int >= 0)
 568                                 devc->timebase = tmp_int;
 569                         else
 570                                 ret = SR_ERR_ARG;
 571                         break;
 572                 case SR_CONF_TRIGGER_SOURCE:
 573                         tmp_str = g_variant_get_string(data, NULL);
 574                         for (i = 0; trigger_sources[i]; i++) {
 575                                 if (!strcmp(tmp_str, trigger_sources[i])) {
 576                                         devc->triggersource = g_strdup(tmp_str);
 577                                         break;
 578                                 }
 579                         }
 580                         if (trigger_sources[i] == 0)
 581                                 ret = SR_ERR_ARG;
 582                         break;
 583                 default:
 584                         ret = SR_ERR_NA;
 585                         break;
 586                 }
 587         } else {
 588                 if (sdi->channel_groups->data == cg)
 589                         ch_idx = 0;
 590                 else if (sdi->channel_groups->next->data == cg)
 591                         ch_idx = 1;
 592                 else
 593                         return SR_ERR_ARG;
 594                 switch (key) {
 595                 case SR_CONF_FILTER:
 596                         devc->filter[ch_idx] = g_variant_get_boolean(data);
 597                         break;
 598                 case SR_CONF_VDIV:
 599                         g_variant_get(data, "(tt)", &p, &q);
 600                         tmp_int = -1;
 601                         for (i = 0; i < ARRAY_SIZE(vdivs); i++) {
 602                                 if (vdivs[i][0] == p && vdivs[i][1] == q) {
 603                                         tmp_int = i;
 604                                         break;
 605                                 }
 606                         }
 607                         if (tmp_int >= 0) {
 608                                 devc->voltage[ch_idx] = tmp_int;
 609                         } else
 610                                 ret = SR_ERR_ARG;
 611                         break;
 612                 case SR_CONF_COUPLING:
 613                         tmp_str = g_variant_get_string(data, NULL);
 614                         for (i = 0; coupling[i]; i++) {
 615                                 if (!strcmp(tmp_str, coupling[i])) {
 616                                         devc->coupling[ch_idx] = i;
 617                                         break;
 618                                 }
 619                         }
 620                         if (coupling[i] == 0)
 621                                 ret = SR_ERR_ARG;
 622                         break;
 623                 default:
 624                         ret = SR_ERR_NA;
 625                         break;
 626                 }
 627         }
 628
 629         return ret;
 630 }
 631
 632 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 633                 const struct sr_channel_group *cg)
 634 {
 635         struct dev_context *devc;
 636         GVariant *tuple, *rational[2];
 637         GVariantBuilder gvb;
 638         unsigned int i;
 639
 640         if (key == SR_CONF_SCAN_OPTIONS) {
 641                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 642                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 643                 return SR_OK;
 644         } else if (key == SR_CONF_DEVICE_OPTIONS && !sdi) {
 645                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 646                                 drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
 647                 return SR_OK;
 648         }
 649
 650         if (!sdi)
 651                 return SR_ERR_ARG;
 652
 653         if (!cg) {
 654         switch (key) {
 655                 case SR_CONF_DEVICE_OPTIONS:
 656                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 657                                         devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 658                         break;
 659                 case SR_CONF_BUFFERSIZE:
 660                         if (!sdi)
 661                                 return SR_ERR_ARG;
 662                         devc = sdi->priv;
 663                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT64,
 664                                         devc->profile->buffersizes, 2, sizeof(uint64_t));
 665                         break;
 666                 case SR_CONF_TIMEBASE:
 667                         g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 668                         for (i = 0; i < ARRAY_SIZE(timebases); i++) {
 669                                 rational[0] = g_variant_new_uint64(timebases[i][0]);
 670                                 rational[1] = g_variant_new_uint64(timebases[i][1]);
 671                                 tuple = g_variant_new_tuple(rational, 2);
 672                                 g_variant_builder_add_value(&gvb, tuple);
 673                         }
 674                         *data = g_variant_builder_end(&gvb);
 675                         break;
 676                 case SR_CONF_TRIGGER_SOURCE:
 677                         *data = g_variant_new_strv(trigger_sources,
 678                                         ARRAY_SIZE(trigger_sources));
 679                         break;
 680                 case SR_CONF_TRIGGER_SLOPE:
 681                         *data = g_variant_new_strv(trigger_slopes,
 682                                         ARRAY_SIZE(trigger_slopes));
 683                         break;
 684                 default:
 685                         return SR_ERR_NA;
 686                 }
 687         } else {
 688         switch (key) {
 689                 case SR_CONF_DEVICE_OPTIONS:
 690                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 691                                         devopts_cg, ARRAY_SIZE(devopts_cg), sizeof(uint32_t));
 692                         break;
 693                 case SR_CONF_COUPLING:
 694                         *data = g_variant_new_strv(coupling, ARRAY_SIZE(coupling));
 695                         break;
 696                 case SR_CONF_VDIV:
 697                         g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 698                         for (i = 0; i < ARRAY_SIZE(vdivs); i++) {
 699                                 rational[0] = g_variant_new_uint64(vdivs[i][0]);
 700                                 rational[1] = g_variant_new_uint64(vdivs[i][1]);
 701                                 tuple = g_variant_new_tuple(rational, 2);
 702                                 g_variant_builder_add_value(&gvb, tuple);
 703                         }
 704                         *data = g_variant_builder_end(&gvb);
 705                         break;
 706                 default:
 707                         return SR_ERR_NA;
 708                 }
 709         }
 710
 711         return SR_OK;
 712 }
 713
 714 static void send_chunk(struct sr_dev_inst *sdi, unsigned char *buf,
 715                 int num_samples)
 716 {
 717         struct sr_datafeed_packet packet;
 718         struct sr_datafeed_analog analog;
 719         struct dev_context *devc;
 720         float ch1, ch2, range;
 721         int num_channels, data_offset, i;
 722
 723         devc = sdi->priv;
 724         num_channels = (devc->ch1_enabled && devc->ch2_enabled) ? 2 : 1;
 725         packet.type = SR_DF_ANALOG;
 726         packet.payload = &analog;
 727         /* TODO: support for 5xxx series 9-bit samples */
 728         analog.channels = devc->enabled_channels;
 729         analog.num_samples = num_samples;
 730         analog.mq = SR_MQ_VOLTAGE;
 731         analog.unit = SR_UNIT_VOLT;
 732         analog.mqflags = 0;
 733         /* TODO: Check malloc return value. */
 734         analog.data = g_try_malloc(analog.num_samples * sizeof(float) * num_channels);
 735         data_offset = 0;
 736         for (i = 0; i < analog.num_samples; i++) {
 737                 /*
 738                  * The device always sends data for both channels. If a channel
 739                  * is disabled, it contains a copy of the enabled channel's
 740                  * data. However, we only send the requested channels to
 741                  * the bus.
 742                  *
 743                  * Voltage values are encoded as a value 0-255 (0-512 on the
 744                  * DSO-5200*), where the value is a point in the range
 745                  * represented by the vdiv setting. There are 8 vertical divs,
 746                  * so e.g. 500mV/div represents 4V peak-to-peak where 0 = -2V
 747                  * and 255 = +2V.
 748                  */
 749                 /* TODO: Support for DSO-5xxx series 9-bit samples. */
 750                 if (devc->ch1_enabled) {
 751                         range = ((float)vdivs[devc->voltage[0]][0] / vdivs[devc->voltage[0]][1]) * 8;
 752                         ch1 = range / 255 * *(buf + i * 2 + 1);
 753                         /* Value is centered around 0V. */
 754                         ch1 -= range / 2;
 755                         analog.data[data_offset++] = ch1;
 756                 }
 757                 if (devc->ch2_enabled) {
 758                         range = ((float)vdivs[devc->voltage[1]][0] / vdivs[devc->voltage[1]][1]) * 8;
 759                         ch2 = range / 255 * *(buf + i * 2);
 760                         ch2 -= range / 2;
 761                         analog.data[data_offset++] = ch2;
 762                 }
 763         }
 764         sr_session_send(devc->cb_data, &packet);
 765 }
 766
 767 /*
 768  * Called by libusb (as triggered by handle_event()) when a transfer comes in.
 769  * Only channel data comes in asynchronously, and all transfers for this are
 770  * queued up beforehand, so this just needs to chuck the incoming data onto
 771  * the libsigrok session bus.
 772  */
 773 static void receive_transfer(struct libusb_transfer *transfer)
 774 {
 775         struct sr_datafeed_packet packet;
 776         struct sr_dev_inst *sdi;
 777         struct dev_context *devc;
 778         int num_samples, pre;
 779
 780         sdi = transfer->user_data;
 781         devc = sdi->priv;
 782         sr_spew("receive_transfer(): status %d received %d bytes.",
 783                    transfer->status, transfer->actual_length);
 784
 785         if (transfer->actual_length == 0)
 786                 /* Nothing to send to the bus. */
 787                 return;
 788
 789         num_samples = transfer->actual_length / 2;
 790
 791         sr_spew("Got %d-%d/%d samples in frame.", devc->samp_received + 1,
 792                    devc->samp_received + num_samples, devc->framesize);
 793
 794         /*
 795          * The device always sends a full frame, but the beginning of the frame
 796          * doesn't represent the trigger point. The offset at which the trigger
 797          * happened came in with the capture state, so we need to start sending
 798          * from there up the session bus. The samples in the frame buffer
 799          * before that trigger point came after the end of the device's frame
 800          * buffer was reached, and it wrapped around to overwrite up until the
 801          * trigger point.
 802          */
 803         if (devc->samp_received < devc->trigger_offset) {
 804                 /* Trigger point not yet reached. */
 805                 if (devc->samp_received + num_samples < devc->trigger_offset) {
 806                         /* The entire chunk is before the trigger point. */
 807                         memcpy(devc->framebuf + devc->samp_buffered * 2,
 808                                         transfer->buffer, num_samples * 2);
 809                         devc->samp_buffered += num_samples;
 810                 } else {
 811                         /*
 812                          * This chunk hits or overruns the trigger point.
 813                          * Store the part before the trigger fired, and
 814                          * send the rest up to the session bus.
 815                          */
 816                         pre = devc->trigger_offset - devc->samp_received;
 817                         memcpy(devc->framebuf + devc->samp_buffered * 2,
 818                                         transfer->buffer, pre * 2);
 819                         devc->samp_buffered += pre;
 820
 821                         /* The rest of this chunk starts with the trigger point. */
 822                         sr_dbg("Reached trigger point, %d samples buffered.",
 823                                    devc->samp_buffered);
 824
 825                         /* Avoid the corner case where the chunk ended at
 826                          * exactly the trigger point. */
 827                         if (num_samples > pre)
 828                                 send_chunk(sdi, transfer->buffer + pre * 2,
 829                                                 num_samples - pre);
 830                 }
 831         } else {
 832                 /* Already past the trigger point, just send it all out. */
 833                 send_chunk(sdi, transfer->buffer,
 834                                 num_samples);
 835         }
 836
 837         devc->samp_received += num_samples;
 838
 839         /* Everything in this transfer was either copied to the buffer or
 840          * sent to the session bus. */
 841         g_free(transfer->buffer);
 842         libusb_free_transfer(transfer);
 843
 844         if (devc->samp_received >= devc->framesize) {
 845                 /* That was the last chunk in this frame. Send the buffered
 846                  * pre-trigger samples out now, in one big chunk. */
 847                 sr_dbg("End of frame, sending %d pre-trigger buffered samples.",
 848                            devc->samp_buffered);
 849                 send_chunk(sdi, devc->framebuf, devc->samp_buffered);
 850
 851                 /* Mark the end of this frame. */
 852                 packet.type = SR_DF_FRAME_END;
 853                 sr_session_send(devc->cb_data, &packet);
 854
 855                 if (devc->limit_frames && ++devc->num_frames == devc->limit_frames) {
 856                         /* Terminate session */
 857                         devc->dev_state = STOPPING;
 858                 } else {
 859                         devc->dev_state = NEW_CAPTURE;
 860                 }
 861         }
 862 }
 863
 864 static int handle_event(int fd, int revents, void *cb_data)
 865 {
 866         const struct sr_dev_inst *sdi;
 867         struct sr_datafeed_packet packet;
 868         struct timeval tv;
 869         struct sr_dev_driver *di;
 870         struct dev_context *devc;
 871         struct drv_context *drvc;
 872         int num_channels;
 873         uint32_t trigger_offset;
 874         uint8_t capturestate;
 875
 876         (void)fd;
 877         (void)revents;
 878
 879         sdi = cb_data;
 880         di = sdi->driver;
 881         drvc = di->priv;
 882         devc = sdi->priv;
 883         if (devc->dev_state == STOPPING) {
 884                 /* We've been told to wind up the acquisition. */
 885                 sr_dbg("Stopping acquisition.");
 886                 /*
 887                  * TODO: Doesn't really cancel pending transfers so they might
 888                  * come in after SR_DF_END is sent.
 889                  */
 890                 usb_source_remove(sdi->session, drvc->sr_ctx);
 891
 892                 packet.type = SR_DF_END;
 893                 sr_session_send(sdi, &packet);
 894
 895                 devc->dev_state = IDLE;
 896
 897                 return TRUE;
 898         }
 899
 900         /* Always handle pending libusb events. */
 901         tv.tv_sec = tv.tv_usec = 0;
 902         libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
 903
 904         /* TODO: ugh */
 905         if (devc->dev_state == NEW_CAPTURE) {
 906                 if (dso_capture_start(sdi) != SR_OK)
 907                         return TRUE;
 908                 if (dso_enable_trigger(sdi) != SR_OK)
 909                         return TRUE;
 910 //              if (dso_force_trigger(sdi) != SR_OK)
 911 //                      return TRUE;
 912                 sr_dbg("Successfully requested next chunk.");
 913                 devc->dev_state = CAPTURE;
 914                 return TRUE;
 915         }
 916         if (devc->dev_state != CAPTURE)
 917                 return TRUE;
 918
 919         if ((dso_get_capturestate(sdi, &capturestate, &trigger_offset)) != SR_OK)
 920                 return TRUE;
 921
 922         sr_dbg("Capturestate %d.", capturestate);
 923         sr_dbg("Trigger offset 0x%.6x.", trigger_offset);
 924         switch (capturestate) {
 925         case CAPTURE_EMPTY:
 926                 if (++devc->capture_empty_count >= MAX_CAPTURE_EMPTY) {
 927                         devc->capture_empty_count = 0;
 928                         if (dso_capture_start(sdi) != SR_OK)
 929                                 break;
 930                         if (dso_enable_trigger(sdi) != SR_OK)
 931                                 break;
 932 //                      if (dso_force_trigger(sdi) != SR_OK)
 933 //                              break;
 934                         sr_dbg("Successfully requested next chunk.");
 935                 }
 936                 break;
 937         case CAPTURE_FILLING:
 938                 /* No data yet. */
 939                 break;
 940         case CAPTURE_READY_8BIT:
 941                 /* Remember where in the captured frame the trigger is. */
 942                 devc->trigger_offset = trigger_offset;
 943
 944                 num_channels = (devc->ch1_enabled && devc->ch2_enabled) ? 2 : 1;
 945                 /* TODO: Check malloc return value. */
 946                 devc->framebuf = g_try_malloc(devc->framesize * num_channels * 2);
 947                 devc->samp_buffered = devc->samp_received = 0;
 948
 949                 /* Tell the scope to send us the first frame. */
 950                 if (dso_get_channeldata(sdi, receive_transfer) != SR_OK)
 951                         break;
 952
 953                 /*
 954                  * Don't hit the state machine again until we're done fetching
 955                  * the data we just told the scope to send.
 956                  */
 957                 devc->dev_state = FETCH_DATA;
 958
 959                 /* Tell the frontend a new frame is on the way. */
 960                 packet.type = SR_DF_FRAME_BEGIN;
 961                 sr_session_send(sdi, &packet);
 962                 break;
 963         case CAPTURE_READY_9BIT:
 964                 /* TODO */
 965                 sr_err("Not yet supported.");
 966                 break;
 967         case CAPTURE_TIMEOUT:
 968                 /* Doesn't matter, we'll try again next time. */
 969                 break;
 970         default:
 971                 sr_dbg("Unknown capture state: %d.", capturestate);
 972                 break;
 973         }
 974
 975         return TRUE;
 976 }
 977
 978 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 979 {
 980         struct dev_context *devc;
 981         struct sr_dev_driver *di = sdi->driver;
 982         struct drv_context *drvc = di->priv;
 983
 984         if (sdi->status != SR_ST_ACTIVE)
 985                 return SR_ERR_DEV_CLOSED;
 986
 987         devc = sdi->priv;
 988         devc->cb_data = cb_data;
 989
 990         if (configure_channels(sdi) != SR_OK) {
 991                 sr_err("Failed to configure channels.");
 992                 return SR_ERR;
 993         }
 994
 995         if (dso_init(sdi) != SR_OK)
 996                 return SR_ERR;
 997
 998         if (dso_capture_start(sdi) != SR_OK)
 999                 return SR_ERR;
1000
1001         devc->dev_state = CAPTURE;
1002         usb_source_add(sdi->session, drvc->sr_ctx, TICK, handle_event, (void *)sdi);
1003
1004         /* Send header packet to the session bus. */
1005         std_session_send_df_header(cb_data, LOG_PREFIX);
1006
1007         return SR_OK;
1008 }
1009
1010 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
1011 {
1012         struct dev_context *devc;
1013
1014         (void)cb_data;
1015
1016         if (sdi->status != SR_ST_ACTIVE)
1017                 return SR_ERR;
1018
1019         devc = sdi->priv;
1020         devc->dev_state = STOPPING;
1021
1022         return SR_OK;
1023 }
1024
1025 SR_PRIV struct sr_dev_driver hantek_dso_driver_info = {
1026         .name = "hantek-dso",
1027         .longname = "Hantek DSO",
1028         .api_version = 1,
1029         .init = init,
1030         .cleanup = cleanup,
1031         .scan = scan,
1032         .dev_list = dev_list,
1033         .dev_clear = dev_clear,
1034         .config_get = config_get,
1035         .config_set = config_set,
1036         .config_list = config_list,
1037         .dev_open = dev_open,
1038         .dev_close = dev_close,
1039         .dev_acquisition_start = dev_acquisition_start,
1040         .dev_acquisition_stop = dev_acquisition_stop,
1041         .priv = NULL,
1042 };