src/hardware/kingst-la2016/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2020 Florian Schmidt <schmidt_florian@gmx.de>
   5  * Copyright (C) 2013 Marcus Comstedt <marcus@mc.pp.se>
   6  * Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
   7  * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
   8  *
   9  * This program is free software: you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation, either version 3 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21  */
  22
  23 /*
  24  * This driver implementation initially was derived from the
  25  * src/hardware/saleae-logic16/ source code.
  26  */
  27
  28 #include <config.h>
  29
  30 #include <libsigrok/libsigrok.h>
  31 #include <string.h>
  32
  33 #include "libsigrok-internal.h"
  34 #include "protocol.h"
  35
  36 static const uint32_t scanopts[] = {
  37         SR_CONF_CONN,
  38 };
  39
  40 static const uint32_t drvopts[] = {
  41         SR_CONF_LOGIC_ANALYZER,
  42 };
  43
  44 static const uint32_t devopts[] = {
  45         /* TODO: SR_CONF_CONTINUOUS, */
  46         SR_CONF_CONN | SR_CONF_GET,
  47         SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  48         SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  49         SR_CONF_LIMIT_MSEC | SR_CONF_GET | SR_CONF_SET,
  50         SR_CONF_VOLTAGE_THRESHOLD | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  51         SR_CONF_LOGIC_THRESHOLD | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  52         SR_CONF_LOGIC_THRESHOLD_CUSTOM | SR_CONF_GET | SR_CONF_SET,
  53         SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
  54         SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET,
  55 };
  56
  57 static const int32_t trigger_matches[] = {
  58         SR_TRIGGER_ZERO,
  59         SR_TRIGGER_ONE,
  60         SR_TRIGGER_RISING,
  61         SR_TRIGGER_FALLING,
  62 };
  63
  64 static const char *channel_names_logic[] = {
  65         "CH0", "CH1", "CH2", "CH3", "CH4", "CH5", "CH6", "CH7",
  66         "CH8", "CH9", "CH10", "CH11", "CH12", "CH13", "CH14", "CH15",
  67         "CH16", "CH17", "CH18", "CH19", "CH20", "CH21", "CH22", "CH23",
  68         "CH24", "CH25", "CH26", "CH27", "CH28", "CH29", "CH30", "CH31",
  69 };
  70
  71 /*
  72  * The hardware uses a 100/200/500MHz base clock (model dependent) and
  73  * a 16bit divider (common across all models). The range from 10kHz to
  74  * 100/200/500MHz should be applicable to all devices. High rates may
  75  * suffer from coarse resolution (e.g. in the "500MHz div 2" case) and
  76  * may not provide the desired 1/2/5 steps. Fortunately this exclusively
  77  * affects the 500MHz model where 250MHz is used instead of 200MHz and
  78  * the 166MHz and 125MHz rates are not presented to users. Deep memory
  79  * of these models and hardware compression reduce the necessity to let
  80  * users pick from a huge list of possible rates.
  81  *
  82  */
  83
  84 static const uint64_t rates_500mhz[] = {
  85         SR_KHZ(10),
  86         SR_KHZ(20),
  87         SR_KHZ(50),
  88         SR_KHZ(100),
  89         SR_KHZ(200),
  90         SR_KHZ(500),
  91         SR_MHZ(1),
  92         SR_MHZ(2),
  93         SR_MHZ(5),
  94         SR_MHZ(10),
  95         SR_MHZ(20),
  96         SR_MHZ(50),
  97         SR_MHZ(100),
  98         SR_MHZ(250),
  99         SR_MHZ(500),
 100 };
 101
 102 static const uint64_t rates_200mhz[] = {
 103         SR_KHZ(10),
 104         SR_KHZ(20),
 105         SR_KHZ(50),
 106         SR_KHZ(100),
 107         SR_KHZ(200),
 108         SR_KHZ(500),
 109         SR_MHZ(1),
 110         SR_MHZ(2),
 111         SR_MHZ(5),
 112         SR_MHZ(10),
 113         SR_MHZ(20),
 114         SR_MHZ(50),
 115         SR_MHZ(100),
 116         SR_MHZ(200),
 117 };
 118
 119 static const uint64_t rates_100mhz[] = {
 120         SR_KHZ(10),
 121         SR_KHZ(20),
 122         SR_KHZ(50),
 123         SR_KHZ(100),
 124         SR_KHZ(200),
 125         SR_KHZ(500),
 126         SR_MHZ(1),
 127         SR_MHZ(2),
 128         SR_MHZ(5),
 129         SR_MHZ(10),
 130         SR_MHZ(20),
 131         SR_MHZ(50),
 132         SR_MHZ(100),
 133 };
 134
 135 static const float logic_threshold_value[] = {
 136         1.58,
 137         2.5,
 138         1.165,
 139         1.5,
 140         1.25,
 141         0.9,
 142         0.75,
 143         0.60,
 144         0.45,
 145 };
 146
 147 static const char *logic_threshold[] = {
 148         "TTL 5V",
 149         "CMOS 5V",
 150         "CMOS 3.3V",
 151         "CMOS 3.0V",
 152         "CMOS 2.5V",
 153         "CMOS 1.8V",
 154         "CMOS 1.5V",
 155         "CMOS 1.2V",
 156         "CMOS 0.9V",
 157         "USER",
 158 };
 159
 160 #define LOGIC_THRESHOLD_IDX_USER        (ARRAY_SIZE(logic_threshold) - 1)
 161
 162 /* Convenience. Release an allocated devc from error paths. */
 163 static void kingst_la2016_free_devc(struct dev_context *devc)
 164 {
 165         if (!devc)
 166                 return;
 167         g_free(devc->mcu_firmware);
 168         g_free(devc->fpga_bitstream);
 169         g_free(devc);
 170 }
 171
 172 /* Convenience. Release an allocated sdi from error paths. */
 173 static void kingst_la2016_free_sdi(struct sr_dev_inst *sdi)
 174 {
 175         if (!sdi)
 176                 return;
 177         g_free(sdi->vendor);
 178         g_free(sdi->model);
 179         g_free(sdi->version);
 180         g_free(sdi->serial_num);
 181         g_free(sdi->connection_id);
 182         sr_usb_dev_inst_free(sdi->conn);
 183         kingst_la2016_free_devc(sdi->priv);
 184 }
 185
 186 /* Convenience. Open a USB device (including claiming an interface). */
 187 static int la2016_open_usb(struct sr_usb_dev_inst *usb,
 188         libusb_device *dev, gboolean show_message)
 189 {
 190         int ret;
 191
 192         ret = libusb_open(dev, &usb->devhdl);
 193         if (ret != 0) {
 194                 if (show_message) {
 195                         sr_err("Cannot open device: %s.",
 196                                 libusb_error_name(ret));
 197                 }
 198                 return SR_ERR_IO;
 199         }
 200
 201         if (usb->address == 0xff) {
 202                 /*
 203                  * First encounter after firmware upload.
 204                  * Grab current address after enumeration.
 205                  */
 206                 usb->address = libusb_get_device_address(dev);
 207         }
 208
 209         ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
 210         if (ret == LIBUSB_ERROR_BUSY) {
 211                 sr_err("Cannot claim USB interface. Another program or driver using it?");
 212                 return SR_ERR_IO;
 213         } else if (ret == LIBUSB_ERROR_NO_DEVICE) {
 214                 sr_err("Device has been disconnected.");
 215                 return SR_ERR_IO;
 216         } else if (ret != 0) {
 217                 sr_err("Cannot claim USB interface: %s.",
 218                         libusb_error_name(ret));
 219                 return SR_ERR_IO;
 220         }
 221
 222         return SR_OK;
 223 }
 224
 225 /* Convenience. Close an opened USB device (and release the interface). */
 226 static void la2016_close_usb(struct sr_usb_dev_inst *usb)
 227 {
 228
 229         if (!usb)
 230                 return;
 231
 232         if (usb->devhdl) {
 233                 libusb_release_interface(usb->devhdl, USB_INTERFACE);
 234                 libusb_close(usb->devhdl);
 235                 usb->devhdl = NULL;
 236         }
 237 }
 238
 239 /* Communicate to an USB device to identify the Kingst LA model. */
 240 static int la2016_identify_read(struct sr_dev_inst *sdi,
 241         struct sr_usb_dev_inst *usb, libusb_device *dev,
 242         gboolean show_message)
 243 {
 244         int ret;
 245
 246         ret = la2016_open_usb(usb, dev, show_message);
 247         if (ret != SR_OK) {
 248                 if (show_message)
 249                         sr_err("Cannot communicate to MCU firmware.");
 250                 return ret;
 251         }
 252         ret = la2016_identify_device(sdi, show_message);
 253         la2016_close_usb(usb);
 254
 255         return ret;
 256 }
 257
 258 /* Find given conn_id in another USB enum. Identify Kingst LA model. */
 259 static int la2016_identify_enum(struct sr_dev_inst *sdi)
 260 {
 261         struct sr_dev_driver *di;
 262         struct drv_context *drvc;
 263         struct sr_context *ctx;
 264         libusb_device **devlist, *dev;
 265         struct libusb_device_descriptor des;
 266         int ret, id_ret;
 267         size_t device_count, dev_idx;
 268         char conn_id[64];
 269
 270         di = sdi->driver;
 271         drvc = di->context;
 272         ctx = drvc->sr_ctx;;
 273
 274         ret = libusb_get_device_list(ctx->libusb_ctx, &devlist);
 275         if (ret < 0)
 276                 return SR_ERR_IO;
 277         device_count = ret;
 278         if (!device_count)
 279                 return SR_ERR_IO;
 280         id_ret = SR_ERR_IO;
 281         for (dev_idx = 0; dev_idx < device_count; dev_idx++) {
 282                 dev = devlist[dev_idx];
 283                 libusb_get_device_descriptor(dev, &des);
 284                 if (des.idVendor != LA2016_VID || des.idProduct != LA2016_PID)
 285                         continue;
 286                 if (des.iProduct != LA2016_IPRODUCT_INDEX)
 287                         continue;
 288                 ret = usb_get_port_path(dev, conn_id, sizeof(conn_id));
 289                 if (ret < 0)
 290                         continue;
 291                 if (strcmp(sdi->connection_id, conn_id) != 0)
 292                         continue;
 293                 id_ret = la2016_identify_read(sdi, sdi->conn, dev, FALSE);
 294                 break;
 295         }
 296         libusb_free_device_list(devlist, 1);
 297
 298         return id_ret;
 299 }
 300
 301 /* Wait for a device to re-appear after firmware upload. */
 302 static int la2016_identify_wait(struct sr_dev_inst *sdi)
 303 {
 304         struct dev_context *devc;
 305         uint64_t reset_done, now, elapsed_ms;
 306         int ret;
 307
 308         devc = sdi->priv;
 309
 310         sr_info("Waiting for device to reset after firmware upload.");
 311         now = g_get_monotonic_time();
 312         reset_done = devc->fw_uploaded + RENUM_GONE_DELAY_MS * 1000;
 313         if (now < reset_done)
 314                 g_usleep(reset_done - now);
 315         do {
 316                 now = g_get_monotonic_time();
 317                 elapsed_ms = (now - devc->fw_uploaded) / 1000;
 318                 sr_spew("Waited %" PRIu64 "ms.", elapsed_ms);
 319                 ret = la2016_identify_enum(sdi);
 320                 if (ret == SR_OK) {
 321                         devc->fw_uploaded = 0;
 322                         break;
 323                 }
 324                 g_usleep(RENUM_POLL_INTERVAL_MS * 1000);
 325         } while (elapsed_ms < RENUM_CHECK_PERIOD_MS);
 326         if (ret != SR_OK) {
 327                 sr_err("Device failed to re-enumerate.");
 328                 return ret;
 329         }
 330         sr_info("Device came back after %" PRIi64 "ms.", elapsed_ms);
 331
 332         return SR_OK;
 333 }
 334
 335 /*
 336  * Open given conn_id from another USB enum. Used by dev_open(). Similar
 337  * to, and should be kept in sync with la2016_identify_enum().
 338  */
 339 static int la2016_open_enum(struct sr_dev_inst *sdi)
 340 {
 341         struct sr_dev_driver *di;
 342         struct drv_context *drvc;
 343         struct sr_context *ctx;
 344         libusb_device **devlist, *dev;
 345         struct libusb_device_descriptor des;
 346         int ret, open_ret;
 347         size_t device_count, dev_idx;
 348         char conn_id[64];
 349
 350         di = sdi->driver;
 351         drvc = di->context;
 352         ctx = drvc->sr_ctx;;
 353
 354         ret = libusb_get_device_list(ctx->libusb_ctx, &devlist);
 355         if (ret < 0)
 356                 return SR_ERR_IO;
 357         device_count = ret;
 358         if (!device_count)
 359                 return SR_ERR_IO;
 360         open_ret = SR_ERR_IO;
 361         for (dev_idx = 0; dev_idx < device_count; dev_idx++) {
 362                 dev = devlist[dev_idx];
 363                 libusb_get_device_descriptor(dev, &des);
 364                 if (des.idVendor != LA2016_VID || des.idProduct != LA2016_PID)
 365                         continue;
 366                 if (des.iProduct != LA2016_IPRODUCT_INDEX)
 367                         continue;
 368                 ret = usb_get_port_path(dev, conn_id, sizeof(conn_id));
 369                 if (ret < 0)
 370                         continue;
 371                 if (strcmp(sdi->connection_id, conn_id) != 0)
 372                         continue;
 373                 open_ret = la2016_open_usb(sdi->conn, dev, TRUE);
 374                 break;
 375         }
 376         libusb_free_device_list(devlist, 1);
 377
 378         return open_ret;
 379 }
 380
 381 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 382 {
 383         struct drv_context *drvc;
 384         struct sr_context *ctx;
 385         struct dev_context *devc;
 386         struct sr_dev_inst *sdi;
 387         struct sr_usb_dev_inst *usb;
 388         struct sr_config *src;
 389         GSList *l;
 390         GSList *devices, *found_devices, *renum_devices;
 391         GSList *conn_devices;
 392         struct libusb_device_descriptor des;
 393         libusb_device **devlist, *dev;
 394         size_t dev_count, dev_idx, ch_idx;
 395         uint8_t bus, addr;
 396         uint16_t pid;
 397         const char *conn;
 398         char conn_id[64];
 399         int ret;
 400         size_t ch_off, ch_max;
 401
 402         drvc = di->context;
 403         ctx = drvc->sr_ctx;;
 404
 405         conn = NULL;
 406         conn_devices = NULL;
 407         for (l = options; l; l = l->next) {
 408                 src = l->data;
 409                 switch (src->key) {
 410                 case SR_CONF_CONN:
 411                         conn = g_variant_get_string(src->data, NULL);
 412                         break;
 413                 }
 414         }
 415         if (conn)
 416                 conn_devices = sr_usb_find(ctx->libusb_ctx, conn);
 417         if (conn && !conn_devices) {
 418                 sr_err("Cannot find the specified connection '%s'.", conn);
 419                 return NULL;
 420         }
 421
 422         /*
 423          * Find all LA2016 devices, optionally upload firmware to them.
 424          * Defer completion of sdi/devc creation until all (selected)
 425          * devices were found in a usable state, and their models got
 426          * identified which affect their feature set. It appears that
 427          * we cannot communicate to the device within the same USB enum
 428          * cycle, needs another USB enumeration after firmware upload.
 429          */
 430         devices = NULL;
 431         found_devices = NULL;
 432         renum_devices = NULL;
 433         ret = libusb_get_device_list(ctx->libusb_ctx, &devlist);
 434         if (ret < 0) {
 435                 sr_err("Cannot get device list: %s.", libusb_error_name(ret));
 436                 return devices;
 437         }
 438         dev_count = ret;
 439         for (dev_idx = 0; dev_idx < dev_count; dev_idx++) {
 440                 dev = devlist[dev_idx];
 441                 bus = libusb_get_bus_number(dev);
 442                 addr = libusb_get_device_address(dev);
 443
 444                 /* Filter by connection when externally specified. */
 445                 for (l = conn_devices; l; l = l->next) {
 446                         usb = l->data;
 447                         if (usb->bus == bus && usb->address == addr)
 448                                 break;
 449                 }
 450                 if (conn_devices && !l) {
 451                         sr_spew("Bus %hhu, addr %hhu do not match specified filter.",
 452                                 bus, addr);
 453                         continue;
 454                 }
 455
 456                 /* Check USB VID:PID. Get the connection string. */
 457                 libusb_get_device_descriptor(dev, &des);
 458                 if (des.idVendor != LA2016_VID || des.idProduct != LA2016_PID)
 459                         continue;
 460                 pid = des.idProduct;
 461                 ret = usb_get_port_path(dev, conn_id, sizeof(conn_id));
 462                 if (ret < 0)
 463                         continue;
 464                 sr_dbg("USB enum found %04x:%04x at path %s, %d.%d.",
 465                         des.idVendor, des.idProduct, conn_id, bus, addr);
 466                 usb = sr_usb_dev_inst_new(bus, addr, NULL);
 467
 468                 sdi = g_malloc0(sizeof(*sdi));
 469                 sdi->driver = di;
 470                 sdi->status = SR_ST_INITIALIZING;
 471                 sdi->inst_type = SR_INST_USB;
 472                 sdi->connection_id = g_strdup(conn_id);
 473                 sdi->conn = usb;
 474
 475                 devc = g_malloc0(sizeof(*devc));
 476                 sdi->priv = devc;
 477
 478                 /*
 479                  * Load MCU firmware if it is currently missing. Which
 480                  * makes the device disappear and renumerate in USB.
 481                  * We need to come back another time to communicate to
 482                  * this device.
 483                  */
 484                 devc->fw_uploaded = 0;
 485                 if (des.iProduct != LA2016_IPRODUCT_INDEX) {
 486                         sr_info("Uploading MCU firmware to '%s'.", conn_id);
 487                         ret = la2016_upload_firmware(sdi, ctx, dev, pid);
 488                         if (ret != SR_OK) {
 489                                 sr_err("MCU firmware upload failed.");
 490                                 kingst_la2016_free_sdi(sdi);
 491                                 continue;
 492                         }
 493                         devc->fw_uploaded = g_get_monotonic_time();
 494                         usb->address = 0xff;
 495                         renum_devices = g_slist_append(renum_devices, sdi);
 496                         continue;
 497                 }
 498
 499                 /*
 500                  * Communicate to the MCU firmware to access EEPROM data
 501                  * which lets us identify the device type. Then stop, to
 502                  * share remaining sdi/devc creation with those devices
 503                  * which had their MCU firmware uploaded above and which
 504                  * get revisited later.
 505                  */
 506                 ret = la2016_identify_read(sdi, usb, dev, TRUE);
 507                 if (ret != SR_OK || !devc->model) {
 508                         sr_err("Unknown or unsupported device type.");
 509                         kingst_la2016_free_sdi(sdi);
 510                         continue;
 511                 }
 512                 found_devices = g_slist_append(found_devices, sdi);
 513         }
 514         libusb_free_device_list(devlist, 1);
 515         g_slist_free_full(conn_devices, sr_usb_dev_inst_free_cb);
 516
 517         /*
 518          * Wait for devices to re-appear after firmware upload. Append
 519          * the yet unidentified device to the list of found devices, or
 520          * release the previously allocated sdi/devc.
 521          */
 522         for (l = renum_devices; l; l = l->next) {
 523                 sdi = l->data;
 524                 devc = sdi->priv;
 525                 ret = la2016_identify_wait(sdi);
 526                 if (ret != SR_OK || !devc->model) {
 527                         sr_dbg("Skipping unusable '%s'.", sdi->connection_id);
 528                         kingst_la2016_free_sdi(sdi);
 529                         continue;
 530                 }
 531                 found_devices = g_slist_append(found_devices, sdi);
 532         }
 533         g_slist_free(renum_devices);
 534
 535         /*
 536          * All found devices got identified, their type is known here.
 537          * Complete the sdi/devc creation. Assign default settings
 538          * because the vendor firmware would not let us read back the
 539          * previously written configuration.
 540          */
 541         for (l = found_devices; l; l = l->next) {
 542                 sdi = l->data;
 543                 devc = sdi->priv;
 544
 545                 sdi->vendor = g_strdup("Kingst");
 546                 sdi->model = g_strdup(devc->model->name);
 547                 ch_off = 0;
 548
 549                 /* Create the logic channels. */
 550                 ch_max = ARRAY_SIZE(channel_names_logic);
 551                 if (ch_max > devc->model->channel_count)
 552                         ch_max = devc->model->channel_count;
 553                 for (ch_idx = 0; ch_idx < ch_max; ch_idx++) {
 554                         sr_channel_new(sdi, ch_off,
 555                                 SR_CHANNEL_LOGIC, TRUE,
 556                                 channel_names_logic[ch_idx]);
 557                         ch_off++;
 558                 }
 559
 560                 sr_sw_limits_init(&devc->sw_limits);
 561                 devc->sw_limits.limit_samples = 0;
 562                 devc->capture_ratio = 50;
 563                 devc->cur_samplerate = devc->model->samplerate;
 564                 devc->threshold_voltage_idx = 0;
 565                 devc->threshold_voltage = logic_threshold_value[devc->threshold_voltage_idx];
 566
 567                 sdi->status = SR_ST_INACTIVE;
 568                 devices = g_slist_append(devices, sdi);
 569         }
 570         g_slist_free(found_devices);
 571
 572         return std_scan_complete(di, devices);
 573 }
 574
 575 static int dev_open(struct sr_dev_inst *sdi)
 576 {
 577         int ret;
 578
 579         ret = la2016_open_enum(sdi);
 580         if (ret != SR_OK) {
 581                 sr_err("Cannot open device.");
 582                 return ret;
 583         }
 584
 585         return SR_OK;
 586 }
 587
 588 static int dev_close(struct sr_dev_inst *sdi)
 589 {
 590         struct sr_usb_dev_inst *usb;
 591
 592         usb = sdi->conn;
 593
 594         if (!usb->devhdl)
 595                 return SR_ERR_BUG;
 596
 597         la2016_deinit_device(sdi);
 598
 599         sr_info("Closing device on %d.%d (logical) / %s (physical) interface %d.",
 600                 usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
 601         la2016_close_usb(sdi->conn);
 602
 603         return SR_OK;
 604 }
 605
 606 static int config_get(uint32_t key, GVariant **data,
 607         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 608 {
 609         struct dev_context *devc;
 610         struct sr_usb_dev_inst *usb;
 611         double rounded;
 612         const char *label;
 613
 614         (void)cg;
 615
 616         if (!sdi)
 617                 return SR_ERR_ARG;
 618         devc = sdi->priv;
 619
 620         switch (key) {
 621         case SR_CONF_CONN:
 622                 if (!sdi->conn)
 623                         return SR_ERR_ARG;
 624                 usb = sdi->conn;
 625                 if (usb->address == 0xff) {
 626                         /*
 627                          * Device still needs to re-enumerate after firmware
 628                          * upload, so we don't know its (future) address.
 629                          */
 630                         return SR_ERR;
 631                 }
 632                 *data = g_variant_new_printf("%d.%d", usb->bus, usb->address);
 633                 break;
 634         case SR_CONF_SAMPLERATE:
 635                 *data = g_variant_new_uint64(devc->cur_samplerate);
 636                 break;
 637         case SR_CONF_LIMIT_SAMPLES:
 638         case SR_CONF_LIMIT_MSEC:
 639                 return sr_sw_limits_config_get(&devc->sw_limits, key, data);
 640         case SR_CONF_CAPTURE_RATIO:
 641                 *data = g_variant_new_uint64(devc->capture_ratio);
 642                 break;
 643         case SR_CONF_VOLTAGE_THRESHOLD:
 644                 rounded = (int)(devc->threshold_voltage / 0.1) * 0.1;
 645                 *data = std_gvar_tuple_double(rounded, rounded + 0.1);
 646                 return SR_OK;
 647         case SR_CONF_LOGIC_THRESHOLD:
 648                 label = logic_threshold[devc->threshold_voltage_idx];
 649                 *data = g_variant_new_string(label);
 650                 break;
 651         case SR_CONF_LOGIC_THRESHOLD_CUSTOM:
 652                 *data = g_variant_new_double(devc->threshold_voltage);
 653                 break;
 654
 655         default:
 656                 return SR_ERR_NA;
 657         }
 658
 659         return SR_OK;
 660 }
 661
 662 static int config_set(uint32_t key, GVariant *data,
 663         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 664 {
 665         struct dev_context *devc;
 666         double low, high;
 667         int idx;
 668
 669         (void)cg;
 670
 671         devc = sdi->priv;
 672
 673         switch (key) {
 674         case SR_CONF_SAMPLERATE:
 675                 devc->cur_samplerate = g_variant_get_uint64(data);
 676                 break;
 677         case SR_CONF_LIMIT_SAMPLES:
 678         case SR_CONF_LIMIT_MSEC:
 679                 return sr_sw_limits_config_set(&devc->sw_limits, key, data);
 680         case SR_CONF_CAPTURE_RATIO:
 681                 devc->capture_ratio = g_variant_get_uint64(data);
 682                 break;
 683         case SR_CONF_VOLTAGE_THRESHOLD:
 684                 g_variant_get(data, "(dd)", &low, &high);
 685                 devc->threshold_voltage = (low + high) / 2.0;
 686                 devc->threshold_voltage_idx = LOGIC_THRESHOLD_IDX_USER;
 687                 break;
 688         case SR_CONF_LOGIC_THRESHOLD: {
 689                 idx = std_str_idx(data, ARRAY_AND_SIZE(logic_threshold));
 690                 if (idx < 0)
 691                         return SR_ERR_ARG;
 692                 if (idx != LOGIC_THRESHOLD_IDX_USER) {
 693                         devc->threshold_voltage = logic_threshold_value[idx];
 694                 }
 695                 devc->threshold_voltage_idx = idx;
 696                 break;
 697         }
 698         case SR_CONF_LOGIC_THRESHOLD_CUSTOM:
 699                 devc->threshold_voltage = g_variant_get_double(data);
 700                 break;
 701         default:
 702                 return SR_ERR_NA;
 703         }
 704
 705         return SR_OK;
 706 }
 707
 708 static int config_list(uint32_t key, GVariant **data,
 709         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 710 {
 711         struct dev_context *devc;
 712
 713         devc = sdi ? sdi->priv : NULL;
 714
 715         switch (key) {
 716         case SR_CONF_SCAN_OPTIONS:
 717         case SR_CONF_DEVICE_OPTIONS:
 718                 return STD_CONFIG_LIST(key, data, sdi, cg,
 719                         scanopts, drvopts, devopts);
 720         case SR_CONF_SAMPLERATE:
 721                 if (!sdi)
 722                         return SR_ERR_ARG;
 723                 if (devc->model->samplerate == SR_MHZ(500))
 724                         *data = std_gvar_samplerates(ARRAY_AND_SIZE(rates_500mhz));
 725                 else if (devc->model->samplerate == SR_MHZ(200))
 726                         *data = std_gvar_samplerates(ARRAY_AND_SIZE(rates_200mhz));
 727                 else
 728                         *data = std_gvar_samplerates(ARRAY_AND_SIZE(rates_100mhz));
 729                 break;
 730         case SR_CONF_LIMIT_SAMPLES:
 731                 *data = std_gvar_tuple_u64(0, LA2016_NUM_SAMPLES_MAX);
 732                 break;
 733         case SR_CONF_VOLTAGE_THRESHOLD:
 734                 *data = std_gvar_min_max_step_thresholds(
 735                         LA2016_THR_VOLTAGE_MIN,
 736                         LA2016_THR_VOLTAGE_MAX, 0.1);
 737                 break;
 738         case SR_CONF_TRIGGER_MATCH:
 739                 *data = std_gvar_array_i32(ARRAY_AND_SIZE(trigger_matches));
 740                 break;
 741         case SR_CONF_LOGIC_THRESHOLD:
 742                 *data = g_variant_new_strv(ARRAY_AND_SIZE(logic_threshold));
 743                 break;
 744         default:
 745                 return SR_ERR_NA;
 746         }
 747
 748         return SR_OK;
 749 }
 750
 751 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 752 {
 753         struct sr_dev_driver *di;
 754         struct drv_context *drvc;
 755         struct sr_context *ctx;
 756         struct dev_context *devc;
 757         int ret;
 758
 759         di = sdi->driver;
 760         drvc = di->context;
 761         ctx = drvc->sr_ctx;;
 762         devc = sdi->priv;
 763
 764         if (!devc->feed_queue) {
 765                 devc->feed_queue = feed_queue_logic_alloc(sdi,
 766                         LA2016_CONVBUFFER_SIZE, sizeof(uint16_t));
 767                 if (!devc->feed_queue) {
 768                         sr_err("Cannot allocate buffer for session feed.");
 769                         return SR_ERR_MALLOC;
 770                 }
 771         }
 772
 773         sr_sw_limits_acquisition_start(&devc->sw_limits);
 774
 775         ret = la2016_setup_acquisition(sdi);
 776         if (ret != SR_OK) {
 777                 feed_queue_logic_free(devc->feed_queue);
 778                 devc->feed_queue = NULL;
 779                 return ret;
 780         }
 781
 782         ret = la2016_start_acquisition(sdi);
 783         if (ret != SR_OK) {
 784                 la2016_abort_acquisition(sdi);
 785                 feed_queue_logic_free(devc->feed_queue);
 786                 devc->feed_queue = NULL;
 787                 return ret;
 788         }
 789
 790         devc->completion_seen = FALSE;
 791         usb_source_add(sdi->session, ctx, 50,
 792                 la2016_receive_data, (void *)sdi);
 793
 794         std_session_send_df_header(sdi);
 795
 796         return SR_OK;
 797 }
 798
 799 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 800 {
 801         int ret;
 802
 803         ret = la2016_abort_acquisition(sdi);
 804
 805         return ret;
 806 }
 807
 808 static struct sr_dev_driver kingst_la2016_driver_info = {
 809         .name = "kingst-la2016",
 810         .longname = "Kingst LA2016",
 811         .api_version = 1,
 812         .init = std_init,
 813         .cleanup = std_cleanup,
 814         .scan = scan,
 815         .dev_list = std_dev_list,
 816         .dev_clear = std_dev_clear,
 817         .config_get = config_get,
 818         .config_set = config_set,
 819         .config_list = config_list,
 820         .dev_open = dev_open,
 821         .dev_close = dev_close,
 822         .dev_acquisition_start = dev_acquisition_start,
 823         .dev_acquisition_stop = dev_acquisition_stop,
 824         .context = NULL,
 825 };
 826 SR_REGISTER_DEV_DRIVER(kingst_la2016_driver_info);