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