src/hardware/kingst-la2016/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2022 Gerhard Sittig <gerhard.sittig@gmx.net>
   5  * Copyright (C) 2020 Florian Schmidt <schmidt_florian@gmx.de>
   6  * Copyright (C) 2013 Marcus Comstedt <marcus@mc.pp.se>
   7  * Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
   8  * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
   9  *
  10  * This program is free software: you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation, either version 3 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22  */
  23
  24 /*
  25  * This driver implementation initially was derived from the
  26  * src/hardware/saleae-logic16/ source code.
  27  */
  28
  29 #include <config.h>
  30
  31 #include <libsigrok/libsigrok.h>
  32 #include <string.h>
  33
  34 #include "libsigrok-internal.h"
  35 #include "protocol.h"
  36
  37 static const uint32_t scanopts[] = {
  38         SR_CONF_CONN,
  39 };
  40
  41 static const uint32_t drvopts[] = {
  42         SR_CONF_LOGIC_ANALYZER,
  43         SR_CONF_SIGNAL_GENERATOR,
  44 };
  45
  46 static const uint32_t devopts[] = {
  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         SR_CONF_CONTINUOUS | SR_CONF_GET | SR_CONF_SET,
  57 };
  58
  59 static const uint32_t devopts_cg_logic[] = {
  60 #if !WITH_THRESHOLD_DEVCFG
  61         SR_CONF_VOLTAGE_THRESHOLD | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  62 #endif
  63 };
  64
  65 static const uint32_t devopts_cg_pwm[] = {
  66         SR_CONF_ENABLED | SR_CONF_GET | SR_CONF_SET,
  67         SR_CONF_OUTPUT_FREQUENCY | SR_CONF_GET | SR_CONF_SET,
  68         SR_CONF_DUTY_CYCLE | SR_CONF_GET | SR_CONF_SET,
  69 };
  70
  71 static const int32_t trigger_matches[] = {
  72         SR_TRIGGER_ZERO,
  73         SR_TRIGGER_ONE,
  74         SR_TRIGGER_RISING,
  75         SR_TRIGGER_FALLING,
  76 };
  77
  78 static const char *channel_names_logic[] = {
  79         "CH0", "CH1", "CH2", "CH3", "CH4", "CH5", "CH6", "CH7",
  80         "CH8", "CH9", "CH10", "CH11", "CH12", "CH13", "CH14", "CH15",
  81         "CH16", "CH17", "CH18", "CH19", "CH20", "CH21", "CH22", "CH23",
  82         "CH24", "CH25", "CH26", "CH27", "CH28", "CH29", "CH30", "CH31",
  83 };
  84
  85 static const char *channel_names_pwm[] = {
  86         "PWM1", "PWM2",
  87 };
  88
  89 /*
  90  * The hardware uses a 100/200/500MHz base clock (model dependent) and
  91  * a 16bit divider (common across all models). The range from 10kHz to
  92  * 100/200/500MHz should be applicable to all devices. High rates may
  93  * suffer from coarse resolution (e.g. in the "500MHz div 2" case) and
  94  * may not provide the desired 1/2/5 steps. Fortunately this exclusively
  95  * affects the 500MHz model where 250MHz is used instead of 200MHz and
  96  * the 166MHz and 125MHz rates are not presented to users. Deep memory
  97  * of these models and hardware compression reduce the necessity to let
  98  * users pick from a huge list of possible rates.
  99  *
 100  */
 101
 102 static const uint64_t rates_500mhz[] = {
 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(250),
 117         SR_MHZ(500),
 118 };
 119
 120 static const uint64_t rates_200mhz[] = {
 121         SR_KHZ(10),
 122         SR_KHZ(20),
 123         SR_KHZ(50),
 124         SR_KHZ(100),
 125         SR_KHZ(200),
 126         SR_KHZ(500),
 127         SR_MHZ(1),
 128         SR_MHZ(2),
 129         SR_MHZ(5),
 130         SR_MHZ(10),
 131         SR_MHZ(20),
 132         SR_MHZ(50),
 133         SR_MHZ(100),
 134         SR_MHZ(200),
 135 };
 136
 137 static const uint64_t rates_100mhz[] = {
 138         SR_KHZ(10),
 139         SR_KHZ(20),
 140         SR_KHZ(50),
 141         SR_KHZ(100),
 142         SR_KHZ(200),
 143         SR_KHZ(500),
 144         SR_MHZ(1),
 145         SR_MHZ(2),
 146         SR_MHZ(5),
 147         SR_MHZ(10),
 148         SR_MHZ(20),
 149         SR_MHZ(50),
 150         SR_MHZ(100),
 151 };
 152
 153 /*
 154  * Only list a few discrete voltages, to form a useful set which covers
 155  * most logic families. Too many choices can make some applications use
 156  * a slider again. Which may lack a scale for the current value, and
 157  * leave users without feedback what the currently used value might be.
 158  */
 159 static const double threshold_ranges[][2] = {
 160         { 0.4, 0.4, },
 161         { 0.6, 0.6, },
 162         { 0.9, 0.9, },
 163         { 1.2, 1.2, },
 164         { 1.4, 1.4, }, /* Default, 1.4V, index 4. */
 165         { 2.0, 2.0, },
 166         { 2.5, 2.5, },
 167         { 4.0, 4.0, },
 168 };
 169 #define LOGIC_THRESHOLD_IDX_DFLT        4
 170
 171 static double threshold_voltage(const struct sr_dev_inst *sdi, double *high)
 172 {
 173         struct dev_context *devc;
 174         size_t idx;
 175         double voltage;
 176
 177         devc = sdi->priv;
 178         idx = devc->threshold_voltage_idx;
 179         voltage = threshold_ranges[idx][0];
 180         if (high)
 181                 *high = threshold_ranges[idx][1];
 182
 183         return voltage;
 184 }
 185
 186 /* Convenience. Release an allocated devc from error paths. */
 187 static void kingst_la2016_free_devc(struct dev_context *devc)
 188 {
 189         if (!devc)
 190                 return;
 191         g_free(devc->mcu_firmware);
 192         g_free(devc->fpga_bitstream);
 193         g_free(devc);
 194 }
 195
 196 /* Convenience. Release an allocated sdi from error paths. */
 197 static void kingst_la2016_free_sdi(struct sr_dev_inst *sdi)
 198 {
 199         if (!sdi)
 200                 return;
 201         g_free(sdi->vendor);
 202         g_free(sdi->model);
 203         g_free(sdi->version);
 204         g_free(sdi->serial_num);
 205         g_free(sdi->connection_id);
 206         sr_usb_dev_inst_free(sdi->conn);
 207         kingst_la2016_free_devc(sdi->priv);
 208 }
 209
 210 /* Convenience. Open a USB device (including claiming an interface). */
 211 static int la2016_open_usb(struct sr_usb_dev_inst *usb,
 212         libusb_device *dev, gboolean show_message)
 213 {
 214         int ret;
 215
 216         ret = libusb_open(dev, &usb->devhdl);
 217         if (ret != 0) {
 218                 if (show_message) {
 219                         sr_err("Cannot open device: %s.",
 220                                 libusb_error_name(ret));
 221                 }
 222                 return SR_ERR_IO;
 223         }
 224
 225         if (usb->address == 0xff) {
 226                 /*
 227                  * First encounter after firmware upload.
 228                  * Grab current address after enumeration.
 229                  */
 230                 usb->address = libusb_get_device_address(dev);
 231         }
 232
 233         ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
 234         if (ret == LIBUSB_ERROR_BUSY) {
 235                 sr_err("Cannot claim USB interface. Another program or driver using it?");
 236                 return SR_ERR_IO;
 237         } else if (ret == LIBUSB_ERROR_NO_DEVICE) {
 238                 sr_err("Device has been disconnected.");
 239                 return SR_ERR_IO;
 240         } else if (ret != 0) {
 241                 sr_err("Cannot claim USB interface: %s.",
 242                         libusb_error_name(ret));
 243                 return SR_ERR_IO;
 244         }
 245
 246         return SR_OK;
 247 }
 248
 249 /* Convenience. Close an opened USB device (and release the interface). */
 250 static void la2016_close_usb(struct sr_usb_dev_inst *usb)
 251 {
 252
 253         if (!usb)
 254                 return;
 255
 256         if (usb->devhdl) {
 257                 libusb_release_interface(usb->devhdl, USB_INTERFACE);
 258                 libusb_close(usb->devhdl);
 259                 usb->devhdl = NULL;
 260         }
 261 }
 262
 263 /* Communicate to an USB device to identify the Kingst LA model. */
 264 static int la2016_identify_read(struct sr_dev_inst *sdi,
 265         struct sr_usb_dev_inst *usb, libusb_device *dev,
 266         gboolean show_message)
 267 {
 268         int ret;
 269
 270         ret = la2016_open_usb(usb, dev, show_message);
 271         if (ret != SR_OK) {
 272                 if (show_message)
 273                         sr_err("Cannot communicate to MCU firmware.");
 274                 return ret;
 275         }
 276
 277         /*
 278          * Also complete the hardware configuration (FPGA bitstream)
 279          * when MCU firmware communication became operational. Either
 280          * failure is considered fatal when probing for the device.
 281          */
 282         ret = la2016_identify_device(sdi, show_message);
 283         if (ret == SR_OK) {
 284                 ret = la2016_init_hardware(sdi);
 285         }
 286
 287         la2016_close_usb(usb);
 288
 289         return ret;
 290 }
 291
 292 /* Find given conn_id in another USB enum. Identify Kingst LA model. */
 293 static int la2016_identify_enum(struct sr_dev_inst *sdi)
 294 {
 295         struct sr_dev_driver *di;
 296         struct drv_context *drvc;
 297         struct sr_context *ctx;
 298         libusb_device **devlist, *dev;
 299         struct libusb_device_descriptor des;
 300         int ret, id_ret;
 301         size_t device_count, dev_idx;
 302         char conn_id[64];
 303
 304         di = sdi->driver;
 305         drvc = di->context;
 306         ctx = drvc->sr_ctx;;
 307
 308         ret = libusb_get_device_list(ctx->libusb_ctx, &devlist);
 309         if (ret < 0)
 310                 return SR_ERR_IO;
 311         device_count = ret;
 312         if (!device_count)
 313                 return SR_ERR_IO;
 314         id_ret = SR_ERR_IO;
 315         for (dev_idx = 0; dev_idx < device_count; dev_idx++) {
 316                 dev = devlist[dev_idx];
 317                 libusb_get_device_descriptor(dev, &des);
 318                 if (des.idVendor != LA2016_VID || des.idProduct != LA2016_PID)
 319                         continue;
 320                 if (des.iProduct != LA2016_IPRODUCT_INDEX)
 321                         continue;
 322                 ret = usb_get_port_path(dev, conn_id, sizeof(conn_id));
 323                 if (ret < 0)
 324                         continue;
 325                 if (strcmp(sdi->connection_id, conn_id) != 0)
 326                         continue;
 327                 id_ret = la2016_identify_read(sdi, sdi->conn, dev, FALSE);
 328                 break;
 329         }
 330         libusb_free_device_list(devlist, 1);
 331
 332         return id_ret;
 333 }
 334
 335 /* Wait for a device to re-appear after firmware upload. */
 336 static int la2016_identify_wait(struct sr_dev_inst *sdi)
 337 {
 338         struct dev_context *devc;
 339         uint64_t reset_done, now, elapsed_ms;
 340         int ret;
 341
 342         devc = sdi->priv;
 343
 344         sr_info("Waiting for device to reset after firmware upload.");
 345         now = g_get_monotonic_time();
 346         reset_done = devc->fw_uploaded + RENUM_GONE_DELAY_MS * 1000;
 347         if (now < reset_done)
 348                 g_usleep(reset_done - now);
 349         do {
 350                 now = g_get_monotonic_time();
 351                 elapsed_ms = (now - devc->fw_uploaded) / 1000;
 352                 sr_spew("Waited %" PRIu64 "ms.", elapsed_ms);
 353                 ret = la2016_identify_enum(sdi);
 354                 if (ret == SR_OK) {
 355                         devc->fw_uploaded = 0;
 356                         break;
 357                 }
 358                 g_usleep(RENUM_POLL_INTERVAL_MS * 1000);
 359         } while (elapsed_ms < RENUM_CHECK_PERIOD_MS);
 360         if (ret != SR_OK) {
 361                 sr_err("Device failed to re-enumerate.");
 362                 return ret;
 363         }
 364         sr_info("Device came back after %" PRIi64 "ms.", elapsed_ms);
 365
 366         return SR_OK;
 367 }
 368
 369 /*
 370  * Open given conn_id from another USB enum. Used by dev_open(). Similar
 371  * to, and should be kept in sync with la2016_identify_enum().
 372  */
 373 static int la2016_open_enum(struct sr_dev_inst *sdi)
 374 {
 375         struct sr_dev_driver *di;
 376         struct drv_context *drvc;
 377         struct sr_context *ctx;
 378         libusb_device **devlist, *dev;
 379         struct libusb_device_descriptor des;
 380         int ret, open_ret;
 381         size_t device_count, dev_idx;
 382         char conn_id[64];
 383
 384         di = sdi->driver;
 385         drvc = di->context;
 386         ctx = drvc->sr_ctx;;
 387
 388         ret = libusb_get_device_list(ctx->libusb_ctx, &devlist);
 389         if (ret < 0)
 390                 return SR_ERR_IO;
 391         device_count = ret;
 392         if (!device_count)
 393                 return SR_ERR_IO;
 394         open_ret = SR_ERR_IO;
 395         for (dev_idx = 0; dev_idx < device_count; dev_idx++) {
 396                 dev = devlist[dev_idx];
 397                 libusb_get_device_descriptor(dev, &des);
 398                 if (des.idVendor != LA2016_VID || des.idProduct != LA2016_PID)
 399                         continue;
 400                 if (des.iProduct != LA2016_IPRODUCT_INDEX)
 401                         continue;
 402                 ret = usb_get_port_path(dev, conn_id, sizeof(conn_id));
 403                 if (ret < 0)
 404                         continue;
 405                 if (strcmp(sdi->connection_id, conn_id) != 0)
 406                         continue;
 407                 open_ret = la2016_open_usb(sdi->conn, dev, TRUE);
 408                 break;
 409         }
 410         libusb_free_device_list(devlist, 1);
 411
 412         return open_ret;
 413 }
 414
 415 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 416 {
 417         struct drv_context *drvc;
 418         struct sr_context *ctx;
 419         struct dev_context *devc;
 420         struct sr_dev_inst *sdi;
 421         struct sr_usb_dev_inst *usb;
 422         struct sr_config *src;
 423         GSList *l;
 424         GSList *devices, *found_devices, *renum_devices;
 425         GSList *conn_devices;
 426         struct libusb_device_descriptor des;
 427         libusb_device **devlist, *dev;
 428         size_t dev_count, dev_idx, ch_idx;
 429         uint8_t bus, addr;
 430         uint16_t pid;
 431         const char *conn;
 432         char conn_id[64];
 433         int ret;
 434         size_t ch_off, ch_max;
 435         struct sr_channel *ch;
 436         struct sr_channel_group *cg;
 437
 438         drvc = di->context;
 439         ctx = drvc->sr_ctx;;
 440
 441         conn = NULL;
 442         conn_devices = NULL;
 443         for (l = options; l; l = l->next) {
 444                 src = l->data;
 445                 switch (src->key) {
 446                 case SR_CONF_CONN:
 447                         conn = g_variant_get_string(src->data, NULL);
 448                         break;
 449                 }
 450         }
 451         if (conn)
 452                 conn_devices = sr_usb_find(ctx->libusb_ctx, conn);
 453         if (conn && !conn_devices) {
 454                 sr_err("Cannot find the specified connection '%s'.", conn);
 455                 return NULL;
 456         }
 457
 458         /*
 459          * Find all LA2016 devices, optionally upload firmware to them.
 460          * Defer completion of sdi/devc creation until all (selected)
 461          * devices were found in a usable state, and their models got
 462          * identified which affect their feature set. It appears that
 463          * we cannot communicate to the device within the same USB enum
 464          * cycle, needs another USB enumeration after firmware upload.
 465          */
 466         devices = NULL;
 467         found_devices = NULL;
 468         renum_devices = NULL;
 469         ret = libusb_get_device_list(ctx->libusb_ctx, &devlist);
 470         if (ret < 0) {
 471                 sr_err("Cannot get device list: %s.", libusb_error_name(ret));
 472                 return devices;
 473         }
 474         dev_count = ret;
 475         for (dev_idx = 0; dev_idx < dev_count; dev_idx++) {
 476                 dev = devlist[dev_idx];
 477                 bus = libusb_get_bus_number(dev);
 478                 addr = libusb_get_device_address(dev);
 479
 480                 /* Filter by connection when externally specified. */
 481                 for (l = conn_devices; l; l = l->next) {
 482                         usb = l->data;
 483                         if (usb->bus == bus && usb->address == addr)
 484                                 break;
 485                 }
 486                 if (conn_devices && !l) {
 487                         sr_spew("Bus %hhu, addr %hhu do not match specified filter.",
 488                                 bus, addr);
 489                         continue;
 490                 }
 491
 492                 /* Check USB VID:PID. Get the connection string. */
 493                 libusb_get_device_descriptor(dev, &des);
 494                 if (des.idVendor != LA2016_VID || des.idProduct != LA2016_PID)
 495                         continue;
 496                 pid = des.idProduct;
 497                 ret = usb_get_port_path(dev, conn_id, sizeof(conn_id));
 498                 if (ret < 0)
 499                         continue;
 500                 sr_dbg("USB enum found %04x:%04x at path %s, %d.%d.",
 501                         des.idVendor, des.idProduct, conn_id, bus, addr);
 502                 usb = sr_usb_dev_inst_new(bus, addr, NULL);
 503
 504                 sdi = g_malloc0(sizeof(*sdi));
 505                 sdi->driver = di;
 506                 sdi->status = SR_ST_INITIALIZING;
 507                 sdi->inst_type = SR_INST_USB;
 508                 sdi->connection_id = g_strdup(conn_id);
 509                 sdi->conn = usb;
 510
 511                 devc = g_malloc0(sizeof(*devc));
 512                 sdi->priv = devc;
 513
 514                 /*
 515                  * Load MCU firmware if it is currently missing. Which
 516                  * makes the device disappear and renumerate in USB.
 517                  * We need to come back another time to communicate to
 518                  * this device.
 519                  */
 520                 devc->fw_uploaded = 0;
 521                 devc->usb_pid = pid;
 522                 if (des.iProduct != LA2016_IPRODUCT_INDEX) {
 523                         sr_info("Uploading MCU firmware to '%s'.", conn_id);
 524                         ret = la2016_upload_firmware(sdi, ctx, dev, FALSE);
 525                         if (ret != SR_OK) {
 526                                 sr_err("MCU firmware upload failed.");
 527                                 kingst_la2016_free_sdi(sdi);
 528                                 continue;
 529                         }
 530                         devc->fw_uploaded = g_get_monotonic_time();
 531                         usb->address = 0xff;
 532                         renum_devices = g_slist_append(renum_devices, sdi);
 533                         continue;
 534                 } else {
 535                         ret = la2016_upload_firmware(sdi, NULL, NULL, TRUE);
 536                         if (ret != SR_OK) {
 537                                 sr_err("MCU firmware filename check failed.");
 538                                 kingst_la2016_free_sdi(sdi);
 539                                 continue;
 540                         }
 541                 }
 542
 543                 /*
 544                  * Communicate to the MCU firmware to access EEPROM data
 545                  * which lets us identify the device type. Then stop, to
 546                  * share remaining sdi/devc creation with those devices
 547                  * which had their MCU firmware uploaded above and which
 548                  * get revisited later.
 549                  */
 550                 ret = la2016_identify_read(sdi, usb, dev, TRUE);
 551                 if (ret != SR_OK || !devc->model) {
 552                         sr_err("Unknown or unsupported device type.");
 553                         kingst_la2016_free_sdi(sdi);
 554                         continue;
 555                 }
 556                 found_devices = g_slist_append(found_devices, sdi);
 557         }
 558         libusb_free_device_list(devlist, 1);
 559         g_slist_free_full(conn_devices, sr_usb_dev_inst_free_cb);
 560
 561         /*
 562          * Wait for devices to re-appear after firmware upload. Append
 563          * the yet unidentified device to the list of found devices, or
 564          * release the previously allocated sdi/devc.
 565          */
 566         for (l = renum_devices; l; l = l->next) {
 567                 sdi = l->data;
 568                 devc = sdi->priv;
 569                 ret = la2016_identify_wait(sdi);
 570                 if (ret != SR_OK || !devc->model) {
 571                         sr_dbg("Skipping unusable '%s'.", sdi->connection_id);
 572                         kingst_la2016_free_sdi(sdi);
 573                         continue;
 574                 }
 575                 found_devices = g_slist_append(found_devices, sdi);
 576         }
 577         g_slist_free(renum_devices);
 578
 579         /*
 580          * All found devices got identified, their type is known here.
 581          * Complete the sdi/devc creation. Assign default settings
 582          * because the vendor firmware would not let us read back the
 583          * previously written configuration.
 584          */
 585         for (l = found_devices; l; l = l->next) {
 586                 sdi = l->data;
 587                 devc = sdi->priv;
 588
 589                 sdi->vendor = g_strdup("Kingst");
 590                 sdi->model = g_strdup(devc->model->name);
 591                 ch_off = 0;
 592
 593                 /* Create the "Logic" channel group. */
 594                 ch_max = ARRAY_SIZE(channel_names_logic);
 595                 if (ch_max > devc->model->channel_count)
 596                         ch_max = devc->model->channel_count;
 597                 cg = sr_channel_group_new(sdi, "Logic", NULL);
 598                 devc->cg_logic = cg;
 599                 for (ch_idx = 0; ch_idx < ch_max; ch_idx++) {
 600                         ch = sr_channel_new(sdi, ch_off,
 601                                 SR_CHANNEL_LOGIC, TRUE,
 602                                 channel_names_logic[ch_idx]);
 603                         ch_off++;
 604                         cg->channels = g_slist_append(cg->channels, ch);
 605                 }
 606
 607                 /* Create the "PWMx" channel groups. */
 608                 ch_max = ARRAY_SIZE(channel_names_pwm);
 609                 for (ch_idx = 0; ch_idx < ch_max; ch_idx++) {
 610                         const char *name;
 611                         name = channel_names_pwm[ch_idx];
 612                         cg = sr_channel_group_new(sdi, name, NULL);
 613                         if (!devc->cg_pwm)
 614                                 devc->cg_pwm = cg;
 615                         ch = sr_channel_new(sdi, ch_off,
 616                                 SR_CHANNEL_ANALOG, FALSE, name);
 617                         ch_off++;
 618                         cg->channels = g_slist_append(cg->channels, ch);
 619                 }
 620
 621                 /*
 622                  * Ideally we'd get the previous configuration from the
 623                  * hardware, but this device is write-only. So we have
 624                  * to assign a fixed set of initial configuration values.
 625                  */
 626                 sr_sw_limits_init(&devc->sw_limits);
 627                 devc->sw_limits.limit_samples = 0;
 628                 devc->capture_ratio = 50;
 629                 devc->samplerate = devc->model->samplerate;
 630                 if (!devc->model->memory_bits)
 631                         devc->continuous = TRUE;
 632                 devc->threshold_voltage_idx = LOGIC_THRESHOLD_IDX_DFLT;
 633                 if  (ARRAY_SIZE(devc->pwm_setting) >= 1) {
 634                         devc->pwm_setting[0].enabled = FALSE;
 635                         devc->pwm_setting[0].freq = SR_KHZ(1);
 636                         devc->pwm_setting[0].duty = 50;
 637                 }
 638                 if  (ARRAY_SIZE(devc->pwm_setting) >= 2) {
 639                         devc->pwm_setting[1].enabled = FALSE;
 640                         devc->pwm_setting[1].freq = SR_KHZ(100);
 641                         devc->pwm_setting[1].duty = 50;
 642                 }
 643
 644                 sdi->status = SR_ST_INACTIVE;
 645                 devices = g_slist_append(devices, sdi);
 646         }
 647         g_slist_free(found_devices);
 648
 649         return std_scan_complete(di, devices);
 650 }
 651
 652 static int dev_open(struct sr_dev_inst *sdi)
 653 {
 654         struct dev_context *devc;
 655         int ret;
 656         size_t ch;
 657
 658         devc = sdi->priv;
 659
 660         ret = la2016_open_enum(sdi);
 661         if (ret != SR_OK) {
 662                 sr_err("Cannot open device.");
 663                 return ret;
 664         }
 665
 666         /* Send most recent PWM configuration to the device. */
 667         for (ch = 0; ch < ARRAY_SIZE(devc->pwm_setting); ch++) {
 668                 ret = la2016_write_pwm_config(sdi, ch);
 669                 if (ret != SR_OK)
 670                         return ret;
 671         }
 672
 673         return SR_OK;
 674 }
 675
 676 static int dev_close(struct sr_dev_inst *sdi)
 677 {
 678         struct sr_usb_dev_inst *usb;
 679
 680         usb = sdi->conn;
 681
 682         if (!usb->devhdl)
 683                 return SR_ERR_BUG;
 684
 685         la2016_release_resources(sdi);
 686
 687         if (WITH_DEINIT_IN_CLOSE)
 688                 la2016_deinit_hardware(sdi);
 689
 690         sr_info("Closing device on %d.%d (logical) / %s (physical) interface %d.",
 691                 usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
 692         la2016_close_usb(sdi->conn);
 693
 694         return SR_OK;
 695 }
 696
 697 /* Config API helper. Get type and index of a channel group. */
 698 static int get_cg_index(const struct sr_dev_inst *sdi,
 699         const struct sr_channel_group *cg,
 700         int *type, size_t *logic, size_t *analog)
 701 {
 702         struct dev_context *devc;
 703         GSList *l;
 704         size_t idx;
 705
 706         /* Preset return values. */
 707         if (type)
 708                 *type = 0;
 709         if (logic)
 710                 *logic = 0;
 711         if (analog)
 712                 *analog = 0;
 713
 714         /* Start categorizing the received cg. */
 715         if (!sdi)
 716                 return SR_ERR_ARG;
 717         devc = sdi->priv;
 718         if (!cg)
 719                 return SR_OK;
 720         l = sdi->channel_groups;
 721
 722         /* First sdi->channelgroups item is "Logic". */
 723         if (!l)
 724                 return SR_ERR_BUG;
 725         if (cg == l->data) {
 726                 if (type)
 727                         *type = SR_CHANNEL_LOGIC;
 728                 if (logic)
 729                         *logic = 0;
 730                 return SR_OK;
 731         }
 732         l = l->next;
 733
 734         /* Next sdi->channelgroups items are "PWMx". */
 735         idx = 0;
 736         while (l && l->data != cg) {
 737                 idx++;
 738                 l = l->next;
 739         }
 740         if (l && idx < ARRAY_SIZE(devc->pwm_setting)) {
 741                 if (type)
 742                         *type = SR_CHANNEL_ANALOG;
 743                 if (analog)
 744                         *analog = idx;
 745                 return SR_OK;
 746         }
 747
 748         return SR_ERR_ARG;
 749 }
 750
 751 static int config_get(uint32_t key, GVariant **data,
 752         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 753 {
 754         struct dev_context *devc;
 755         int ret, cg_type;
 756         size_t logic_idx, analog_idx;
 757         struct pwm_setting *pwm;
 758         struct sr_usb_dev_inst *usb;
 759         double voltage, rounded;
 760
 761         (void)rounded;
 762         (void)voltage;
 763
 764         if (!sdi)
 765                 return SR_ERR_ARG;
 766         devc = sdi->priv;
 767
 768         /* Check for types (and index) of channel groups. */
 769         ret = get_cg_index(sdi, cg, &cg_type, &logic_idx, &analog_idx);
 770         if (cg && ret != SR_OK)
 771                 return SR_ERR_ARG;
 772
 773         /* Handle requests for the "Logic" channel group. */
 774         if (cg && cg_type == SR_CHANNEL_LOGIC) {
 775                 switch (key) {
 776 #if !WITH_THRESHOLD_DEVCFG
 777                 case SR_CONF_VOLTAGE_THRESHOLD:
 778                         voltage = threshold_voltage(sdi, NULL);
 779                         *data = std_gvar_tuple_double(voltage, voltage);
 780                         break;
 781 #endif /* WITH_THRESHOLD_DEVCFG */
 782                 default:
 783                         return SR_ERR_NA;
 784                 }
 785                 return SR_OK;
 786         }
 787
 788         /* Handle requests for the "PWMx" channel groups. */
 789         if (cg && cg_type == SR_CHANNEL_ANALOG) {
 790                 pwm = &devc->pwm_setting[analog_idx];
 791                 switch (key) {
 792                 case SR_CONF_ENABLED:
 793                         *data = g_variant_new_boolean(pwm->enabled);
 794                         break;
 795                 case SR_CONF_OUTPUT_FREQUENCY:
 796                         *data = g_variant_new_double(pwm->freq);
 797                         break;
 798                 case SR_CONF_DUTY_CYCLE:
 799                         *data = g_variant_new_double(pwm->duty);
 800                         break;
 801                 default:
 802                         return SR_ERR_NA;
 803                 }
 804                 return SR_OK;
 805         }
 806
 807         switch (key) {
 808         case SR_CONF_CONN:
 809                 usb = sdi->conn;
 810                 *data = g_variant_new_printf("%d.%d", usb->bus, usb->address);
 811                 break;
 812         case SR_CONF_SAMPLERATE:
 813                 *data = g_variant_new_uint64(devc->samplerate);
 814                 break;
 815         case SR_CONF_LIMIT_SAMPLES:
 816         case SR_CONF_LIMIT_MSEC:
 817                 return sr_sw_limits_config_get(&devc->sw_limits, key, data);
 818         case SR_CONF_CAPTURE_RATIO:
 819                 *data = g_variant_new_uint64(devc->capture_ratio);
 820                 break;
 821 #if WITH_THRESHOLD_DEVCFG
 822         case SR_CONF_VOLTAGE_THRESHOLD:
 823                 voltage = threshold_voltage(sdi, NULL);
 824                 *data = std_gvar_tuple_double(voltage, voltage);
 825                 break;
 826 #endif /* WITH_THRESHOLD_DEVCFG */
 827         case SR_CONF_CONTINUOUS:
 828                 *data = g_variant_new_boolean(devc->continuous);
 829                 break;
 830         default:
 831                 return SR_ERR_NA;
 832         }
 833
 834         return SR_OK;
 835 }
 836
 837 static int config_set(uint32_t key, GVariant *data,
 838         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 839 {
 840         struct dev_context *devc;
 841         int ret, cg_type;
 842         size_t logic_idx, analog_idx;
 843         struct pwm_setting *pwm;
 844         double value_f;
 845         int idx;
 846         gboolean on;
 847
 848         devc = sdi->priv;
 849
 850         /* Check for types (and index) of channel groups. */
 851         ret = get_cg_index(sdi, cg, &cg_type, &logic_idx, &analog_idx);
 852         if (cg && ret != SR_OK)
 853                 return SR_ERR_ARG;
 854
 855         /* Handle requests for the "Logic" channel group. */
 856         if (cg && cg_type == SR_CHANNEL_LOGIC) {
 857                 switch (key) {
 858 #if !WITH_THRESHOLD_DEVCFG
 859                 case SR_CONF_LOGIC_THRESHOLD:
 860                         idx = std_double_tuple_idx(data,
 861                                 ARRAY_AND_SIZE(threshold_ranges));
 862                         if (idx < 0)
 863                                 return SR_ERR_ARG;
 864                         devc->threshold_voltage_idx = idx;
 865                         break;
 866 #endif /* WITH_THRESHOLD_DEVCFG */
 867                 default:
 868                         return SR_ERR_NA;
 869                 }
 870                 return SR_OK;
 871         }
 872
 873         /* Handle requests for the "PWMx" channel groups. */
 874         if (cg && cg_type == SR_CHANNEL_ANALOG) {
 875                 pwm = &devc->pwm_setting[analog_idx];
 876                 switch (key) {
 877                 case SR_CONF_ENABLED:
 878                         pwm->enabled = g_variant_get_boolean(data);
 879                         ret = la2016_write_pwm_config(sdi, analog_idx);
 880                         if (ret != SR_OK)
 881                                 return ret;
 882                         break;
 883                 case SR_CONF_OUTPUT_FREQUENCY:
 884                         value_f = g_variant_get_double(data);
 885                         if (value_f <= 0.0 || value_f > MAX_PWM_FREQ)
 886                                 return SR_ERR_ARG;
 887                         pwm->freq = value_f;
 888                         ret = la2016_write_pwm_config(sdi, analog_idx);
 889                         if (ret != SR_OK)
 890                                 return ret;
 891                         break;
 892                 case SR_CONF_DUTY_CYCLE:
 893                         value_f = g_variant_get_double(data);
 894                         if (value_f <= 0.0 || value_f > 100.0)
 895                                 return SR_ERR_ARG;
 896                         pwm->duty = value_f;
 897                         ret = la2016_write_pwm_config(sdi, analog_idx);
 898                         if (ret != SR_OK)
 899                                 return ret;
 900                         break;
 901                 default:
 902                         return SR_ERR_NA;
 903                 }
 904                 return SR_OK;
 905         }
 906
 907         switch (key) {
 908         case SR_CONF_SAMPLERATE:
 909                 devc->samplerate = g_variant_get_uint64(data);
 910                 break;
 911         case SR_CONF_LIMIT_SAMPLES:
 912         case SR_CONF_LIMIT_MSEC:
 913                 return sr_sw_limits_config_set(&devc->sw_limits, key, data);
 914         case SR_CONF_CAPTURE_RATIO:
 915                 devc->capture_ratio = g_variant_get_uint64(data);
 916                 break;
 917 #if WITH_THRESHOLD_DEVCFG
 918         case SR_CONF_VOLTAGE_THRESHOLD:
 919                 idx = std_double_tuple_idx(data,
 920                         ARRAY_AND_SIZE(threshold_ranges));
 921                 if (idx < 0)
 922                         return SR_ERR_ARG;
 923                 devc->threshold_voltage_idx = idx;
 924                 break;
 925 #endif /* WITH_THRESHOLD_DEVCFG */
 926         case SR_CONF_CONTINUOUS:
 927                 on = g_variant_get_boolean(data);
 928                 if (!devc->model->memory_bits && !on)
 929                         return SR_ERR_ARG;
 930                 devc->continuous = on;
 931                 break;
 932         default:
 933                 return SR_ERR_NA;
 934         }
 935
 936         return SR_OK;
 937 }
 938
 939 static int config_list(uint32_t key, GVariant **data,
 940         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 941 {
 942         struct dev_context *devc;
 943         int ret, cg_type;
 944         size_t logic_idx, analog_idx;
 945
 946         devc = sdi ? sdi->priv : NULL;
 947
 948         /* Check for types (and index) of channel groups. */
 949         ret = get_cg_index(sdi, cg, &cg_type, &logic_idx, &analog_idx);
 950         if (cg && ret != SR_OK)
 951                 return SR_ERR_ARG;
 952
 953         /* Handle requests for the "Logic" channel group. */
 954         if (cg && cg_type == SR_CHANNEL_LOGIC) {
 955                 switch (key) {
 956                 case SR_CONF_DEVICE_OPTIONS:
 957                         if (ARRAY_SIZE(devopts_cg_logic) == 0)
 958                                 return SR_ERR_NA;
 959                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 960                                 devopts_cg_logic, ARRAY_SIZE(devopts_cg_logic),
 961                                 sizeof(devopts_cg_logic[0]));
 962                         break;
 963 #if !WITH_THRESHOLD_DEVCFG
 964                 case SR_CONF_VOLTAGE_THRESHOLD:
 965                         *data = std_gvar_thresholds(ARRAY_AND_SIZE(threshold_ranges));
 966                         break;
 967 #endif /* WITH_THRESHOLD_DEVCFG */
 968                 default:
 969                         return SR_ERR_NA;
 970                 }
 971                 return SR_OK;
 972         }
 973
 974         /* Handle requests for the "PWMx" channel groups. */
 975         if (cg && cg_type == SR_CHANNEL_ANALOG) {
 976                 switch (key) {
 977                 case SR_CONF_DEVICE_OPTIONS:
 978                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 979                                 devopts_cg_pwm, ARRAY_SIZE(devopts_cg_pwm),
 980                                 sizeof(devopts_cg_pwm[0]));
 981                         break;
 982                 default:
 983                         return SR_ERR_NA;
 984                 }
 985                 return SR_OK;
 986         }
 987
 988         switch (key) {
 989         case SR_CONF_SCAN_OPTIONS:
 990         case SR_CONF_DEVICE_OPTIONS:
 991                 return STD_CONFIG_LIST(key, data, sdi, cg,
 992                         scanopts, drvopts, devopts);
 993         case SR_CONF_SAMPLERATE:
 994                 if (!sdi)
 995                         return SR_ERR_ARG;
 996                 if (devc->model->samplerate == SR_MHZ(500))
 997                         *data = std_gvar_samplerates(ARRAY_AND_SIZE(rates_500mhz));
 998                 else if (devc->model->samplerate == SR_MHZ(200))
 999                         *data = std_gvar_samplerates(ARRAY_AND_SIZE(rates_200mhz));
1000                 else if (devc->model->samplerate == SR_MHZ(100))
1001                         *data = std_gvar_samplerates(ARRAY_AND_SIZE(rates_100mhz));
1002                 else
1003                         return SR_ERR_BUG;
1004                 break;
1005         case SR_CONF_LIMIT_SAMPLES:
1006                 *data = std_gvar_tuple_u64(0, LA2016_NUM_SAMPLES_MAX);
1007                 break;
1008 #if WITH_THRESHOLD_DEVCFG
1009         case SR_CONF_VOLTAGE_THRESHOLD:
1010                 *data = std_gvar_thresholds(ARRAY_AND_SIZE(threshold_ranges));
1011                 break;
1012 #endif /* WITH_THRESHOLD_DEVCFG */
1013         case SR_CONF_TRIGGER_MATCH:
1014                 *data = std_gvar_array_i32(ARRAY_AND_SIZE(trigger_matches));
1015                 break;
1016         default:
1017                 return SR_ERR_NA;
1018         }
1019
1020         return SR_OK;
1021 }
1022
1023 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
1024 {
1025         struct sr_dev_driver *di;
1026         struct drv_context *drvc;
1027         struct sr_context *ctx;
1028         struct dev_context *devc;
1029         size_t unitsize;
1030         double voltage;
1031         int ret;
1032
1033         di = sdi->driver;
1034         drvc = di->context;
1035         ctx = drvc->sr_ctx;;
1036         devc = sdi->priv;
1037
1038         if (!devc->feed_queue) {
1039                 if (devc->model->channel_count == 32)
1040                         unitsize = sizeof(uint32_t);
1041                 else if (devc->model->channel_count == 16)
1042                         unitsize = sizeof(uint16_t);
1043                 else
1044                         return SR_ERR_ARG;
1045                 devc->feed_queue = feed_queue_logic_alloc(sdi,
1046                         LA2016_CONVBUFFER_SIZE, unitsize);
1047                 if (!devc->feed_queue) {
1048                         sr_err("Cannot allocate buffer for session feed.");
1049                         return SR_ERR_MALLOC;
1050                 }
1051                 devc->packets_per_chunk = TRANSFER_PACKET_LENGTH;
1052                 devc->packets_per_chunk--;
1053                 devc->packets_per_chunk /= unitsize + sizeof(uint8_t);
1054         }
1055
1056         sr_sw_limits_acquisition_start(&devc->sw_limits);
1057
1058         voltage = threshold_voltage(sdi, NULL);
1059         ret = la2016_setup_acquisition(sdi, voltage);
1060         if (ret != SR_OK) {
1061                 feed_queue_logic_free(devc->feed_queue);
1062                 devc->feed_queue = NULL;
1063                 return ret;
1064         }
1065
1066         ret = la2016_start_acquisition(sdi);
1067         if (ret != SR_OK) {
1068                 la2016_abort_acquisition(sdi);
1069                 feed_queue_logic_free(devc->feed_queue);
1070                 devc->feed_queue = NULL;
1071                 return ret;
1072         }
1073
1074         devc->completion_seen = FALSE;
1075         usb_source_add(sdi->session, ctx, 50,
1076                 la2016_receive_data, (void *)sdi);
1077
1078         std_session_send_df_header(sdi);
1079
1080         return SR_OK;
1081 }
1082
1083 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
1084 {
1085         int ret;
1086
1087         ret = la2016_abort_acquisition(sdi);
1088
1089         return ret;
1090 }
1091
1092 static struct sr_dev_driver kingst_la2016_driver_info = {
1093         .name = "kingst-la2016",
1094         .longname = "Kingst LA2016",
1095         .api_version = 1,
1096         .init = std_init,
1097         .cleanup = std_cleanup,
1098         .scan = scan,
1099         .dev_list = std_dev_list,
1100         .dev_clear = std_dev_clear,
1101         .config_get = config_get,
1102         .config_set = config_set,
1103         .config_list = config_list,
1104         .dev_open = dev_open,
1105         .dev_close = dev_close,
1106         .dev_acquisition_start = dev_acquisition_start,
1107         .dev_acquisition_stop = dev_acquisition_stop,
1108         .context = NULL,
1109 };
1110 SR_REGISTER_DEV_DRIVER(kingst_la2016_driver_info);