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         SR_CONF_SIGNAL_GENERATOR,
  43 };
  44
  45 static const uint32_t devopts[] = {
  46         /* TODO: SR_CONF_CONTINUOUS, */
  47         SR_CONF_CONN | SR_CONF_GET,
  48         SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  49         SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  50         SR_CONF_LIMIT_MSEC | SR_CONF_GET | SR_CONF_SET,
  51 #if WITH_THRESHOLD_DEVCFG
  52         SR_CONF_VOLTAGE_THRESHOLD | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  53 #endif
  54         SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
  55         SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET,
  56 };
  57
  58 static const uint32_t devopts_cg_logic[] = {
  59 #if !WITH_THRESHOLD_DEVCFG
  60         SR_CONF_VOLTAGE_THRESHOLD | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  61 #endif
  62 };
  63
  64 static const uint32_t devopts_cg_pwm[] = {
  65         SR_CONF_ENABLED | SR_CONF_GET | SR_CONF_SET,
  66         SR_CONF_OUTPUT_FREQUENCY | SR_CONF_GET | SR_CONF_SET,
  67         SR_CONF_DUTY_CYCLE | SR_CONF_GET | SR_CONF_SET,
  68 };
  69
  70 static const int32_t trigger_matches[] = {
  71         SR_TRIGGER_ZERO,
  72         SR_TRIGGER_ONE,
  73         SR_TRIGGER_RISING,
  74         SR_TRIGGER_FALLING,
  75 };
  76
  77 static const char *channel_names_logic[] = {
  78         "CH0", "CH1", "CH2", "CH3", "CH4", "CH5", "CH6", "CH7",
  79         "CH8", "CH9", "CH10", "CH11", "CH12", "CH13", "CH14", "CH15",
  80         "CH16", "CH17", "CH18", "CH19", "CH20", "CH21", "CH22", "CH23",
  81         "CH24", "CH25", "CH26", "CH27", "CH28", "CH29", "CH30", "CH31",
  82 };
  83
  84 static const char *channel_names_pwm[] = {
  85         "PWM1", "PWM2",
  86 };
  87
  88 /*
  89  * The hardware uses a 100/200/500MHz base clock (model dependent) and
  90  * a 16bit divider (common across all models). The range from 10kHz to
  91  * 100/200/500MHz should be applicable to all devices. High rates may
  92  * suffer from coarse resolution (e.g. in the "500MHz div 2" case) and
  93  * may not provide the desired 1/2/5 steps. Fortunately this exclusively
  94  * affects the 500MHz model where 250MHz is used instead of 200MHz and
  95  * the 166MHz and 125MHz rates are not presented to users. Deep memory
  96  * of these models and hardware compression reduce the necessity to let
  97  * users pick from a huge list of possible rates.
  98  *
  99  */
 100
 101 static const uint64_t rates_500mhz[] = {
 102         SR_KHZ(10),
 103         SR_KHZ(20),
 104         SR_KHZ(50),
 105         SR_KHZ(100),
 106         SR_KHZ(200),
 107         SR_KHZ(500),
 108         SR_MHZ(1),
 109         SR_MHZ(2),
 110         SR_MHZ(5),
 111         SR_MHZ(10),
 112         SR_MHZ(20),
 113         SR_MHZ(50),
 114         SR_MHZ(100),
 115         SR_MHZ(250),
 116         SR_MHZ(500),
 117 };
 118
 119 static const uint64_t rates_200mhz[] = {
 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         SR_MHZ(200),
 134 };
 135
 136 static const uint64_t rates_100mhz[] = {
 137         SR_KHZ(10),
 138         SR_KHZ(20),
 139         SR_KHZ(50),
 140         SR_KHZ(100),
 141         SR_KHZ(200),
 142         SR_KHZ(500),
 143         SR_MHZ(1),
 144         SR_MHZ(2),
 145         SR_MHZ(5),
 146         SR_MHZ(10),
 147         SR_MHZ(20),
 148         SR_MHZ(50),
 149         SR_MHZ(100),
 150 };
 151
 152 /*
 153  * Only list a few discrete voltages, to form a useful set which covers
 154  * most logic families. Too many choices can make some applications use
 155  * a slider again. Which may lack a scale for the current value, and
 156  * leave users without feedback what the currently used value might be.
 157  */
 158 static const double threshold_ranges[][2] = {
 159         { 0.4, 0.4, },
 160         { 0.6, 0.6, },
 161         { 0.9, 0.9, },
 162         { 1.2, 1.2, },
 163         { 1.4, 1.4, }, /* Default, 1.4V, index 4. */
 164         { 2.0, 2.0, },
 165         { 2.5, 2.5, },
 166         { 4.0, 4.0, },
 167 };
 168 #define LOGIC_THRESHOLD_IDX_DFLT        4
 169
 170 static double threshold_voltage(const struct sr_dev_inst *sdi, double *high)
 171 {
 172         struct dev_context *devc;
 173         size_t idx;
 174         double voltage;
 175
 176         devc = sdi->priv;
 177         idx = devc->threshold_voltage_idx;
 178         voltage = threshold_ranges[idx][0];
 179         if (high)
 180                 *high = threshold_ranges[idx][1];
 181
 182         return voltage;
 183 }
 184
 185 /* Convenience. Release an allocated devc from error paths. */
 186 static void kingst_la2016_free_devc(struct dev_context *devc)
 187 {
 188         if (!devc)
 189                 return;
 190         g_free(devc->mcu_firmware);
 191         g_free(devc->fpga_bitstream);
 192         g_free(devc);
 193 }
 194
 195 /* Convenience. Release an allocated sdi from error paths. */
 196 static void kingst_la2016_free_sdi(struct sr_dev_inst *sdi)
 197 {
 198         if (!sdi)
 199                 return;
 200         g_free(sdi->vendor);
 201         g_free(sdi->model);
 202         g_free(sdi->version);
 203         g_free(sdi->serial_num);
 204         g_free(sdi->connection_id);
 205         sr_usb_dev_inst_free(sdi->conn);
 206         kingst_la2016_free_devc(sdi->priv);
 207 }
 208
 209 /* Convenience. Open a USB device (including claiming an interface). */
 210 static int la2016_open_usb(struct sr_usb_dev_inst *usb,
 211         libusb_device *dev, gboolean show_message)
 212 {
 213         int ret;
 214
 215         ret = libusb_open(dev, &usb->devhdl);
 216         if (ret != 0) {
 217                 if (show_message) {
 218                         sr_err("Cannot open device: %s.",
 219                                 libusb_error_name(ret));
 220                 }
 221                 return SR_ERR_IO;
 222         }
 223
 224         if (usb->address == 0xff) {
 225                 /*
 226                  * First encounter after firmware upload.
 227                  * Grab current address after enumeration.
 228                  */
 229                 usb->address = libusb_get_device_address(dev);
 230         }
 231
 232         ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
 233         if (ret == LIBUSB_ERROR_BUSY) {
 234                 sr_err("Cannot claim USB interface. Another program or driver using it?");
 235                 return SR_ERR_IO;
 236         } else if (ret == LIBUSB_ERROR_NO_DEVICE) {
 237                 sr_err("Device has been disconnected.");
 238                 return SR_ERR_IO;
 239         } else if (ret != 0) {
 240                 sr_err("Cannot claim USB interface: %s.",
 241                         libusb_error_name(ret));
 242                 return SR_ERR_IO;
 243         }
 244
 245         return SR_OK;
 246 }
 247
 248 /* Convenience. Close an opened USB device (and release the interface). */
 249 static void la2016_close_usb(struct sr_usb_dev_inst *usb)
 250 {
 251
 252         if (!usb)
 253                 return;
 254
 255         if (usb->devhdl) {
 256                 libusb_release_interface(usb->devhdl, USB_INTERFACE);
 257                 libusb_close(usb->devhdl);
 258                 usb->devhdl = NULL;
 259         }
 260 }
 261
 262 /* Communicate to an USB device to identify the Kingst LA model. */
 263 static int la2016_identify_read(struct sr_dev_inst *sdi,
 264         struct sr_usb_dev_inst *usb, libusb_device *dev,
 265         gboolean show_message)
 266 {
 267         int ret;
 268
 269         ret = la2016_open_usb(usb, dev, show_message);
 270         if (ret != SR_OK) {
 271                 if (show_message)
 272                         sr_err("Cannot communicate to MCU firmware.");
 273                 return ret;
 274         }
 275
 276         /*
 277          * Also complete the hardware configuration (FPGA bitstream)
 278          * when MCU firmware communication became operational. Either
 279          * failure is considered fatal when probing for the device.
 280          */
 281         ret = la2016_identify_device(sdi, show_message);
 282         if (ret == SR_OK) {
 283                 ret = la2016_init_hardware(sdi);
 284         }
 285
 286         la2016_close_usb(usb);
 287
 288         return ret;
 289 }
 290
 291 /* Find given conn_id in another USB enum. Identify Kingst LA model. */
 292 static int la2016_identify_enum(struct sr_dev_inst *sdi)
 293 {
 294         struct sr_dev_driver *di;
 295         struct drv_context *drvc;
 296         struct sr_context *ctx;
 297         libusb_device **devlist, *dev;
 298         struct libusb_device_descriptor des;
 299         int ret, id_ret;
 300         size_t device_count, dev_idx;
 301         char conn_id[64];
 302
 303         di = sdi->driver;
 304         drvc = di->context;
 305         ctx = drvc->sr_ctx;;
 306
 307         ret = libusb_get_device_list(ctx->libusb_ctx, &devlist);
 308         if (ret < 0)
 309                 return SR_ERR_IO;
 310         device_count = ret;
 311         if (!device_count)
 312                 return SR_ERR_IO;
 313         id_ret = SR_ERR_IO;
 314         for (dev_idx = 0; dev_idx < device_count; dev_idx++) {
 315                 dev = devlist[dev_idx];
 316                 libusb_get_device_descriptor(dev, &des);
 317                 if (des.idVendor != LA2016_VID || des.idProduct != LA2016_PID)
 318                         continue;
 319                 if (des.iProduct != LA2016_IPRODUCT_INDEX)
 320                         continue;
 321                 ret = usb_get_port_path(dev, conn_id, sizeof(conn_id));
 322                 if (ret < 0)
 323                         continue;
 324                 if (strcmp(sdi->connection_id, conn_id) != 0)
 325                         continue;
 326                 id_ret = la2016_identify_read(sdi, sdi->conn, dev, FALSE);
 327                 break;
 328         }
 329         libusb_free_device_list(devlist, 1);
 330
 331         return id_ret;
 332 }
 333
 334 /* Wait for a device to re-appear after firmware upload. */
 335 static int la2016_identify_wait(struct sr_dev_inst *sdi)
 336 {
 337         struct dev_context *devc;
 338         uint64_t reset_done, now, elapsed_ms;
 339         int ret;
 340
 341         devc = sdi->priv;
 342
 343         sr_info("Waiting for device to reset after firmware upload.");
 344         now = g_get_monotonic_time();
 345         reset_done = devc->fw_uploaded + RENUM_GONE_DELAY_MS * 1000;
 346         if (now < reset_done)
 347                 g_usleep(reset_done - now);
 348         do {
 349                 now = g_get_monotonic_time();
 350                 elapsed_ms = (now - devc->fw_uploaded) / 1000;
 351                 sr_spew("Waited %" PRIu64 "ms.", elapsed_ms);
 352                 ret = la2016_identify_enum(sdi);
 353                 if (ret == SR_OK) {
 354                         devc->fw_uploaded = 0;
 355                         break;
 356                 }
 357                 g_usleep(RENUM_POLL_INTERVAL_MS * 1000);
 358         } while (elapsed_ms < RENUM_CHECK_PERIOD_MS);
 359         if (ret != SR_OK) {
 360                 sr_err("Device failed to re-enumerate.");
 361                 return ret;
 362         }
 363         sr_info("Device came back after %" PRIi64 "ms.", elapsed_ms);
 364
 365         return SR_OK;
 366 }
 367
 368 /*
 369  * Open given conn_id from another USB enum. Used by dev_open(). Similar
 370  * to, and should be kept in sync with la2016_identify_enum().
 371  */
 372 static int la2016_open_enum(struct sr_dev_inst *sdi)
 373 {
 374         struct sr_dev_driver *di;
 375         struct drv_context *drvc;
 376         struct sr_context *ctx;
 377         libusb_device **devlist, *dev;
 378         struct libusb_device_descriptor des;
 379         int ret, open_ret;
 380         size_t device_count, dev_idx;
 381         char conn_id[64];
 382
 383         di = sdi->driver;
 384         drvc = di->context;
 385         ctx = drvc->sr_ctx;;
 386
 387         ret = libusb_get_device_list(ctx->libusb_ctx, &devlist);
 388         if (ret < 0)
 389                 return SR_ERR_IO;
 390         device_count = ret;
 391         if (!device_count)
 392                 return SR_ERR_IO;
 393         open_ret = SR_ERR_IO;
 394         for (dev_idx = 0; dev_idx < device_count; dev_idx++) {
 395                 dev = devlist[dev_idx];
 396                 libusb_get_device_descriptor(dev, &des);
 397                 if (des.idVendor != LA2016_VID || des.idProduct != LA2016_PID)
 398                         continue;
 399                 if (des.iProduct != LA2016_IPRODUCT_INDEX)
 400                         continue;
 401                 ret = usb_get_port_path(dev, conn_id, sizeof(conn_id));
 402                 if (ret < 0)
 403                         continue;
 404                 if (strcmp(sdi->connection_id, conn_id) != 0)
 405                         continue;
 406                 open_ret = la2016_open_usb(sdi->conn, dev, TRUE);
 407                 break;
 408         }
 409         libusb_free_device_list(devlist, 1);
 410
 411         return open_ret;
 412 }
 413
 414 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 415 {
 416         struct drv_context *drvc;
 417         struct sr_context *ctx;
 418         struct dev_context *devc;
 419         struct sr_dev_inst *sdi;
 420         struct sr_usb_dev_inst *usb;
 421         struct sr_config *src;
 422         GSList *l;
 423         GSList *devices, *found_devices, *renum_devices;
 424         GSList *conn_devices;
 425         struct libusb_device_descriptor des;
 426         libusb_device **devlist, *dev;
 427         size_t dev_count, dev_idx, ch_idx;
 428         uint8_t bus, addr;
 429         uint16_t pid;
 430         const char *conn;
 431         char conn_id[64];
 432         int ret;
 433         size_t ch_off, ch_max;
 434         struct sr_channel *ch;
 435         struct sr_channel_group *cg;
 436
 437         drvc = di->context;
 438         ctx = drvc->sr_ctx;;
 439
 440         conn = NULL;
 441         conn_devices = NULL;
 442         for (l = options; l; l = l->next) {
 443                 src = l->data;
 444                 switch (src->key) {
 445                 case SR_CONF_CONN:
 446                         conn = g_variant_get_string(src->data, NULL);
 447                         break;
 448                 }
 449         }
 450         if (conn)
 451                 conn_devices = sr_usb_find(ctx->libusb_ctx, conn);
 452         if (conn && !conn_devices) {
 453                 sr_err("Cannot find the specified connection '%s'.", conn);
 454                 return NULL;
 455         }
 456
 457         /*
 458          * Find all LA2016 devices, optionally upload firmware to them.
 459          * Defer completion of sdi/devc creation until all (selected)
 460          * devices were found in a usable state, and their models got
 461          * identified which affect their feature set. It appears that
 462          * we cannot communicate to the device within the same USB enum
 463          * cycle, needs another USB enumeration after firmware upload.
 464          */
 465         devices = NULL;
 466         found_devices = NULL;
 467         renum_devices = NULL;
 468         ret = libusb_get_device_list(ctx->libusb_ctx, &devlist);
 469         if (ret < 0) {
 470                 sr_err("Cannot get device list: %s.", libusb_error_name(ret));
 471                 return devices;
 472         }
 473         dev_count = ret;
 474         for (dev_idx = 0; dev_idx < dev_count; dev_idx++) {
 475                 dev = devlist[dev_idx];
 476                 bus = libusb_get_bus_number(dev);
 477                 addr = libusb_get_device_address(dev);
 478
 479                 /* Filter by connection when externally specified. */
 480                 for (l = conn_devices; l; l = l->next) {
 481                         usb = l->data;
 482                         if (usb->bus == bus && usb->address == addr)
 483                                 break;
 484                 }
 485                 if (conn_devices && !l) {
 486                         sr_spew("Bus %hhu, addr %hhu do not match specified filter.",
 487                                 bus, addr);
 488                         continue;
 489                 }
 490
 491                 /* Check USB VID:PID. Get the connection string. */
 492                 libusb_get_device_descriptor(dev, &des);
 493                 if (des.idVendor != LA2016_VID || des.idProduct != LA2016_PID)
 494                         continue;
 495                 pid = des.idProduct;
 496                 ret = usb_get_port_path(dev, conn_id, sizeof(conn_id));
 497                 if (ret < 0)
 498                         continue;
 499                 sr_dbg("USB enum found %04x:%04x at path %s, %d.%d.",
 500                         des.idVendor, des.idProduct, conn_id, bus, addr);
 501                 usb = sr_usb_dev_inst_new(bus, addr, NULL);
 502
 503                 sdi = g_malloc0(sizeof(*sdi));
 504                 sdi->driver = di;
 505                 sdi->status = SR_ST_INITIALIZING;
 506                 sdi->inst_type = SR_INST_USB;
 507                 sdi->connection_id = g_strdup(conn_id);
 508                 sdi->conn = usb;
 509
 510                 devc = g_malloc0(sizeof(*devc));
 511                 sdi->priv = devc;
 512
 513                 /*
 514                  * Load MCU firmware if it is currently missing. Which
 515                  * makes the device disappear and renumerate in USB.
 516                  * We need to come back another time to communicate to
 517                  * this device.
 518                  */
 519                 devc->fw_uploaded = 0;
 520                 if (des.iProduct != LA2016_IPRODUCT_INDEX) {
 521                         sr_info("Uploading MCU firmware to '%s'.", conn_id);
 522                         ret = la2016_upload_firmware(sdi, ctx, dev, pid);
 523                         if (ret != SR_OK) {
 524                                 sr_err("MCU firmware upload failed.");
 525                                 kingst_la2016_free_sdi(sdi);
 526                                 continue;
 527                         }
 528                         devc->fw_uploaded = g_get_monotonic_time();
 529                         usb->address = 0xff;
 530                         renum_devices = g_slist_append(renum_devices, sdi);
 531                         continue;
 532                 }
 533
 534                 /*
 535                  * Communicate to the MCU firmware to access EEPROM data
 536                  * which lets us identify the device type. Then stop, to
 537                  * share remaining sdi/devc creation with those devices
 538                  * which had their MCU firmware uploaded above and which
 539                  * get revisited later.
 540                  */
 541                 ret = la2016_identify_read(sdi, usb, dev, TRUE);
 542                 if (ret != SR_OK || !devc->model) {
 543                         sr_err("Unknown or unsupported device type.");
 544                         kingst_la2016_free_sdi(sdi);
 545                         continue;
 546                 }
 547                 found_devices = g_slist_append(found_devices, sdi);
 548         }
 549         libusb_free_device_list(devlist, 1);
 550         g_slist_free_full(conn_devices, sr_usb_dev_inst_free_cb);
 551
 552         /*
 553          * Wait for devices to re-appear after firmware upload. Append
 554          * the yet unidentified device to the list of found devices, or
 555          * release the previously allocated sdi/devc.
 556          */
 557         for (l = renum_devices; l; l = l->next) {
 558                 sdi = l->data;
 559                 devc = sdi->priv;
 560                 ret = la2016_identify_wait(sdi);
 561                 if (ret != SR_OK || !devc->model) {
 562                         sr_dbg("Skipping unusable '%s'.", sdi->connection_id);
 563                         kingst_la2016_free_sdi(sdi);
 564                         continue;
 565                 }
 566                 found_devices = g_slist_append(found_devices, sdi);
 567         }
 568         g_slist_free(renum_devices);
 569
 570         /*
 571          * All found devices got identified, their type is known here.
 572          * Complete the sdi/devc creation. Assign default settings
 573          * because the vendor firmware would not let us read back the
 574          * previously written configuration.
 575          */
 576         for (l = found_devices; l; l = l->next) {
 577                 sdi = l->data;
 578                 devc = sdi->priv;
 579
 580                 sdi->vendor = g_strdup("Kingst");
 581                 sdi->model = g_strdup(devc->model->name);
 582                 ch_off = 0;
 583
 584                 /* Create the "Logic" channel group. */
 585                 ch_max = ARRAY_SIZE(channel_names_logic);
 586                 if (ch_max > devc->model->channel_count)
 587                         ch_max = devc->model->channel_count;
 588                 cg = sr_channel_group_new(sdi, "Logic", NULL);
 589                 devc->cg_logic = cg;
 590                 for (ch_idx = 0; ch_idx < ch_max; ch_idx++) {
 591                         ch = sr_channel_new(sdi, ch_off,
 592                                 SR_CHANNEL_LOGIC, TRUE,
 593                                 channel_names_logic[ch_idx]);
 594                         ch_off++;
 595                         cg->channels = g_slist_append(cg->channels, ch);
 596                 }
 597
 598                 /* Create the "PWMx" channel groups. */
 599                 ch_max = ARRAY_SIZE(channel_names_pwm);
 600                 for (ch_idx = 0; ch_idx < ch_max; ch_idx++) {
 601                         const char *name;
 602                         name = channel_names_pwm[ch_idx];
 603                         cg = sr_channel_group_new(sdi, name, NULL);
 604                         if (!devc->cg_pwm)
 605                                 devc->cg_pwm = cg;
 606                         ch = sr_channel_new(sdi, ch_off,
 607                                 SR_CHANNEL_ANALOG, FALSE, name);
 608                         ch_off++;
 609                         cg->channels = g_slist_append(cg->channels, ch);
 610                 }
 611
 612                 /*
 613                  * Ideally we'd get the previous configuration from the
 614                  * hardware, but this device is write-only. So we have
 615                  * to assign a fixed set of initial configuration values.
 616                  */
 617                 sr_sw_limits_init(&devc->sw_limits);
 618                 devc->sw_limits.limit_samples = 0;
 619                 devc->capture_ratio = 50;
 620                 devc->samplerate = devc->model->samplerate;
 621                 devc->threshold_voltage_idx = LOGIC_THRESHOLD_IDX_DFLT;
 622                 if  (ARRAY_SIZE(devc->pwm_setting) >= 1) {
 623                         devc->pwm_setting[0].enabled = FALSE;
 624                         devc->pwm_setting[0].freq = SR_KHZ(1);
 625                         devc->pwm_setting[0].duty = 50;
 626                 }
 627                 if  (ARRAY_SIZE(devc->pwm_setting) >= 2) {
 628                         devc->pwm_setting[1].enabled = FALSE;
 629                         devc->pwm_setting[1].freq = SR_KHZ(100);
 630                         devc->pwm_setting[1].duty = 50;
 631                 }
 632
 633                 sdi->status = SR_ST_INACTIVE;
 634                 devices = g_slist_append(devices, sdi);
 635         }
 636         g_slist_free(found_devices);
 637
 638         return std_scan_complete(di, devices);
 639 }
 640
 641 static int dev_open(struct sr_dev_inst *sdi)
 642 {
 643         struct dev_context *devc;
 644         int ret;
 645         size_t ch;
 646
 647         devc = sdi->priv;
 648
 649         ret = la2016_open_enum(sdi);
 650         if (ret != SR_OK) {
 651                 sr_err("Cannot open device.");
 652                 return ret;
 653         }
 654
 655         /* Send most recent PWM configuration to the device. */
 656         for (ch = 0; ch < ARRAY_SIZE(devc->pwm_setting); ch++) {
 657                 ret = la2016_write_pwm_config(sdi, ch);
 658                 if (ret != SR_OK)
 659                         return ret;
 660         }
 661
 662         return SR_OK;
 663 }
 664
 665 static int dev_close(struct sr_dev_inst *sdi)
 666 {
 667         struct sr_usb_dev_inst *usb;
 668
 669         usb = sdi->conn;
 670
 671         if (!usb->devhdl)
 672                 return SR_ERR_BUG;
 673
 674         la2016_deinit_hardware(sdi);
 675
 676         sr_info("Closing device on %d.%d (logical) / %s (physical) interface %d.",
 677                 usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
 678         la2016_close_usb(sdi->conn);
 679
 680         return SR_OK;
 681 }
 682
 683 /* Config API helper. Get type and index of a channel group. */
 684 static int get_cg_index(const struct sr_dev_inst *sdi,
 685         const struct sr_channel_group *cg,
 686         int *type, size_t *logic, size_t *analog)
 687 {
 688         struct dev_context *devc;
 689         GSList *l;
 690         size_t idx;
 691
 692         /* Preset return values. */
 693         if (type)
 694                 *type = 0;
 695         if (logic)
 696                 *logic = 0;
 697         if (analog)
 698                 *analog = 0;
 699
 700         /* Start categorizing the received cg. */
 701         if (!sdi)
 702                 return SR_ERR_ARG;
 703         devc = sdi->priv;
 704         if (!cg)
 705                 return SR_OK;
 706         l = sdi->channel_groups;
 707
 708         /* First sdi->channelgroups item is "Logic". */
 709         if (!l)
 710                 return SR_ERR_BUG;
 711         if (cg == l->data) {
 712                 if (type)
 713                         *type = SR_CHANNEL_LOGIC;
 714                 if (logic)
 715                         *logic = 0;
 716                 return SR_OK;
 717         }
 718         l = l->next;
 719
 720         /* Next sdi->channelgroups items are "PWMx". */
 721         idx = 0;
 722         while (l && l->data != cg) {
 723                 idx++;
 724                 l = l->next;
 725         }
 726         if (l && idx < ARRAY_SIZE(devc->pwm_setting)) {
 727                 if (type)
 728                         *type = SR_CHANNEL_ANALOG;
 729                 if (analog)
 730                         *analog = idx;
 731                 return SR_OK;
 732         }
 733
 734         return SR_ERR_ARG;
 735 }
 736
 737 static int config_get(uint32_t key, GVariant **data,
 738         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 739 {
 740         struct dev_context *devc;
 741         int ret, cg_type;
 742         size_t logic_idx, analog_idx;
 743         struct pwm_setting *pwm;
 744         struct sr_usb_dev_inst *usb;
 745         double voltage, rounded;
 746
 747         (void)rounded;
 748         (void)voltage;
 749
 750         if (!sdi)
 751                 return SR_ERR_ARG;
 752         devc = sdi->priv;
 753
 754         /* Check for types (and index) of channel groups. */
 755         ret = get_cg_index(sdi, cg, &cg_type, &logic_idx, &analog_idx);
 756         if (cg && ret != SR_OK)
 757                 return SR_ERR_ARG;
 758
 759         /* Handle requests for the "Logic" channel group. */
 760         if (cg && cg_type == SR_CHANNEL_LOGIC) {
 761                 switch (key) {
 762 #if !WITH_THRESHOLD_DEVCFG
 763                 case SR_CONF_VOLTAGE_THRESHOLD:
 764                         voltage = threshold_voltage(sdi, NULL);
 765                         *data = std_gvar_tuple_double(voltage, voltage);
 766                         break;
 767 #endif /* WITH_THRESHOLD_DEVCFG */
 768                 default:
 769                         return SR_ERR_NA;
 770                 }
 771                 return SR_OK;
 772         }
 773
 774         /* Handle requests for the "PWMx" channel groups. */
 775         if (cg && cg_type == SR_CHANNEL_ANALOG) {
 776                 pwm = &devc->pwm_setting[analog_idx];
 777                 switch (key) {
 778                 case SR_CONF_ENABLED:
 779                         *data = g_variant_new_boolean(pwm->enabled);
 780                         break;
 781                 case SR_CONF_OUTPUT_FREQUENCY:
 782                         *data = g_variant_new_double(pwm->freq);
 783                         break;
 784                 case SR_CONF_DUTY_CYCLE:
 785                         *data = g_variant_new_double(pwm->duty);
 786                         break;
 787                 default:
 788                         return SR_ERR_NA;
 789                 }
 790                 return SR_OK;
 791         }
 792
 793         switch (key) {
 794         case SR_CONF_CONN:
 795                 usb = sdi->conn;
 796                 *data = g_variant_new_printf("%d.%d", usb->bus, usb->address);
 797                 break;
 798         case SR_CONF_SAMPLERATE:
 799                 *data = g_variant_new_uint64(devc->samplerate);
 800                 break;
 801         case SR_CONF_LIMIT_SAMPLES:
 802         case SR_CONF_LIMIT_MSEC:
 803                 return sr_sw_limits_config_get(&devc->sw_limits, key, data);
 804         case SR_CONF_CAPTURE_RATIO:
 805                 *data = g_variant_new_uint64(devc->capture_ratio);
 806                 break;
 807 #if WITH_THRESHOLD_DEVCFG
 808         case SR_CONF_VOLTAGE_THRESHOLD:
 809                 voltage = threshold_voltage(sdi, NULL);
 810                 *data = std_gvar_tuple_double(voltage, voltage);
 811                 break;
 812 #endif /* WITH_THRESHOLD_DEVCFG */
 813         default:
 814                 return SR_ERR_NA;
 815         }
 816
 817         return SR_OK;
 818 }
 819
 820 static int config_set(uint32_t key, GVariant *data,
 821         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 822 {
 823         struct dev_context *devc;
 824         int ret, cg_type;
 825         size_t logic_idx, analog_idx;
 826         struct pwm_setting *pwm;
 827         double value_f;
 828         int idx;
 829
 830         devc = sdi->priv;
 831
 832         /* Check for types (and index) of channel groups. */
 833         ret = get_cg_index(sdi, cg, &cg_type, &logic_idx, &analog_idx);
 834         if (cg && ret != SR_OK)
 835                 return SR_ERR_ARG;
 836
 837         /* Handle requests for the "Logic" channel group. */
 838         if (cg && cg_type == SR_CHANNEL_LOGIC) {
 839                 switch (key) {
 840 #if !WITH_THRESHOLD_DEVCFG
 841                 case SR_CONF_LOGIC_THRESHOLD:
 842                         idx = std_double_tuple_idx(data,
 843                                 ARRAY_AND_SIZE(threshold_ranges));
 844                         if (idx < 0)
 845                                 return SR_ERR_ARG;
 846                         devc->threshold_voltage_idx = idx;
 847                         break;
 848 #endif /* WITH_THRESHOLD_DEVCFG */
 849                 default:
 850                         return SR_ERR_NA;
 851                 }
 852                 return SR_OK;
 853         }
 854
 855         /* Handle requests for the "PWMx" channel groups. */
 856         if (cg && cg_type == SR_CHANNEL_ANALOG) {
 857                 pwm = &devc->pwm_setting[analog_idx];
 858                 switch (key) {
 859                 case SR_CONF_ENABLED:
 860                         pwm->enabled = g_variant_get_boolean(data);
 861                         ret = la2016_write_pwm_config(sdi, analog_idx);
 862                         if (ret != SR_OK)
 863                                 return ret;
 864                         break;
 865                 case SR_CONF_OUTPUT_FREQUENCY:
 866                         value_f = g_variant_get_double(data);
 867                         if (value_f <= 0.0 || value_f > MAX_PWM_FREQ)
 868                                 return SR_ERR_ARG;
 869                         pwm->freq = value_f;
 870                         ret = la2016_write_pwm_config(sdi, analog_idx);
 871                         if (ret != SR_OK)
 872                                 return ret;
 873                         break;
 874                 case SR_CONF_DUTY_CYCLE:
 875                         value_f = g_variant_get_double(data);
 876                         if (value_f <= 0.0 || value_f > 100.0)
 877                                 return SR_ERR_ARG;
 878                         pwm->duty = value_f;
 879                         ret = la2016_write_pwm_config(sdi, analog_idx);
 880                         if (ret != SR_OK)
 881                                 return ret;
 882                         break;
 883                 default:
 884                         return SR_ERR_NA;
 885                 }
 886                 return SR_OK;
 887         }
 888
 889         switch (key) {
 890         case SR_CONF_SAMPLERATE:
 891                 devc->samplerate = g_variant_get_uint64(data);
 892                 break;
 893         case SR_CONF_LIMIT_SAMPLES:
 894         case SR_CONF_LIMIT_MSEC:
 895                 return sr_sw_limits_config_set(&devc->sw_limits, key, data);
 896         case SR_CONF_CAPTURE_RATIO:
 897                 devc->capture_ratio = g_variant_get_uint64(data);
 898                 break;
 899 #if WITH_THRESHOLD_DEVCFG
 900         case SR_CONF_VOLTAGE_THRESHOLD:
 901                 idx = std_double_tuple_idx(data,
 902                         ARRAY_AND_SIZE(threshold_ranges));
 903                 if (idx < 0)
 904                         return SR_ERR_ARG;
 905                 devc->threshold_voltage_idx = idx;
 906                 break;
 907 #endif /* WITH_THRESHOLD_DEVCFG */
 908         default:
 909                 return SR_ERR_NA;
 910         }
 911
 912         return SR_OK;
 913 }
 914
 915 static int config_list(uint32_t key, GVariant **data,
 916         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 917 {
 918         struct dev_context *devc;
 919         int ret, cg_type;
 920         size_t logic_idx, analog_idx;
 921
 922         devc = sdi ? sdi->priv : NULL;
 923
 924         /* Check for types (and index) of channel groups. */
 925         ret = get_cg_index(sdi, cg, &cg_type, &logic_idx, &analog_idx);
 926         if (cg && ret != SR_OK)
 927                 return SR_ERR_ARG;
 928
 929         /* Handle requests for the "Logic" channel group. */
 930         if (cg && cg_type == SR_CHANNEL_LOGIC) {
 931                 switch (key) {
 932                 case SR_CONF_DEVICE_OPTIONS:
 933                         if (ARRAY_SIZE(devopts_cg_logic) == 0)
 934                                 return SR_ERR_NA;
 935                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 936                                 devopts_cg_logic, ARRAY_SIZE(devopts_cg_logic),
 937                                 sizeof(devopts_cg_logic[0]));
 938                         break;
 939 #if !WITH_THRESHOLD_DEVCFG
 940                 case SR_CONF_VOLTAGE_THRESHOLD:
 941                         *data = std_gvar_thresholds(ARRAY_AND_SIZE(threshold_ranges));
 942                         break;
 943 #endif /* WITH_THRESHOLD_DEVCFG */
 944                 default:
 945                         return SR_ERR_NA;
 946                 }
 947                 return SR_OK;
 948         }
 949
 950         /* Handle requests for the "PWMx" channel groups. */
 951         if (cg && cg_type == SR_CHANNEL_ANALOG) {
 952                 switch (key) {
 953                 case SR_CONF_DEVICE_OPTIONS:
 954                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 955                                 devopts_cg_pwm, ARRAY_SIZE(devopts_cg_pwm),
 956                                 sizeof(devopts_cg_pwm[0]));
 957                         break;
 958                 default:
 959                         return SR_ERR_NA;
 960                 }
 961                 return SR_OK;
 962         }
 963
 964         switch (key) {
 965         case SR_CONF_SCAN_OPTIONS:
 966         case SR_CONF_DEVICE_OPTIONS:
 967                 return STD_CONFIG_LIST(key, data, sdi, cg,
 968                         scanopts, drvopts, devopts);
 969         case SR_CONF_SAMPLERATE:
 970                 if (!sdi)
 971                         return SR_ERR_ARG;
 972                 if (devc->model->samplerate == SR_MHZ(500))
 973                         *data = std_gvar_samplerates(ARRAY_AND_SIZE(rates_500mhz));
 974                 else if (devc->model->samplerate == SR_MHZ(200))
 975                         *data = std_gvar_samplerates(ARRAY_AND_SIZE(rates_200mhz));
 976                 else
 977                         *data = std_gvar_samplerates(ARRAY_AND_SIZE(rates_100mhz));
 978                 break;
 979         case SR_CONF_LIMIT_SAMPLES:
 980                 *data = std_gvar_tuple_u64(0, LA2016_NUM_SAMPLES_MAX);
 981                 break;
 982 #if WITH_THRESHOLD_DEVCFG
 983         case SR_CONF_VOLTAGE_THRESHOLD:
 984                 *data = std_gvar_thresholds(ARRAY_AND_SIZE(threshold_ranges));
 985                 break;
 986 #endif /* WITH_THRESHOLD_DEVCFG */
 987         case SR_CONF_TRIGGER_MATCH:
 988                 *data = std_gvar_array_i32(ARRAY_AND_SIZE(trigger_matches));
 989                 break;
 990         default:
 991                 return SR_ERR_NA;
 992         }
 993
 994         return SR_OK;
 995 }
 996
 997 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 998 {
 999         struct sr_dev_driver *di;
1000         struct drv_context *drvc;
1001         struct sr_context *ctx;
1002         struct dev_context *devc;
1003         double voltage;
1004         int ret;
1005
1006         di = sdi->driver;
1007         drvc = di->context;
1008         ctx = drvc->sr_ctx;;
1009         devc = sdi->priv;
1010
1011         if (!devc->feed_queue) {
1012                 devc->feed_queue = feed_queue_logic_alloc(sdi,
1013                         LA2016_CONVBUFFER_SIZE, sizeof(uint16_t));
1014                 if (!devc->feed_queue) {
1015                         sr_err("Cannot allocate buffer for session feed.");
1016                         return SR_ERR_MALLOC;
1017                 }
1018         }
1019
1020         sr_sw_limits_acquisition_start(&devc->sw_limits);
1021
1022         voltage = threshold_voltage(sdi, NULL);
1023         ret = la2016_setup_acquisition(sdi, voltage);
1024         if (ret != SR_OK) {
1025                 feed_queue_logic_free(devc->feed_queue);
1026                 devc->feed_queue = NULL;
1027                 return ret;
1028         }
1029
1030         ret = la2016_start_acquisition(sdi);
1031         if (ret != SR_OK) {
1032                 la2016_abort_acquisition(sdi);
1033                 feed_queue_logic_free(devc->feed_queue);
1034                 devc->feed_queue = NULL;
1035                 return ret;
1036         }
1037
1038         devc->completion_seen = FALSE;
1039         usb_source_add(sdi->session, ctx, 50,
1040                 la2016_receive_data, (void *)sdi);
1041
1042         std_session_send_df_header(sdi);
1043
1044         return SR_OK;
1045 }
1046
1047 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
1048 {
1049         int ret;
1050
1051         ret = la2016_abort_acquisition(sdi);
1052
1053         return ret;
1054 }
1055
1056 static struct sr_dev_driver kingst_la2016_driver_info = {
1057         .name = "kingst-la2016",
1058         .longname = "Kingst LA2016",
1059         .api_version = 1,
1060         .init = std_init,
1061         .cleanup = std_cleanup,
1062         .scan = scan,
1063         .dev_list = std_dev_list,
1064         .dev_clear = std_dev_clear,
1065         .config_get = config_get,
1066         .config_set = config_set,
1067         .config_list = config_list,
1068         .dev_open = dev_open,
1069         .dev_close = dev_close,
1070         .dev_acquisition_start = dev_acquisition_start,
1071         .dev_acquisition_stop = dev_acquisition_stop,
1072         .context = NULL,
1073 };
1074 SR_REGISTER_DEV_DRIVER(kingst_la2016_driver_info);