src/hardware/chronovu-la/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2011-2015 Uwe Hermann <uwe@hermann-uwe.de>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <config.h>
  21 #include "protocol.h"
  22
  23 static const uint32_t drvopts[] = {
  24         SR_CONF_LOGIC_ANALYZER,
  25 };
  26
  27 static const uint32_t scanopts[] = {
  28         SR_CONF_CONN,
  29 };
  30
  31 static const uint32_t devopts[] = {
  32         SR_CONF_LIMIT_MSEC | SR_CONF_SET,
  33         SR_CONF_LIMIT_SAMPLES | SR_CONF_SET | SR_CONF_LIST,
  34         SR_CONF_CONN | SR_CONF_GET,
  35         SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  36         SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
  37 };
  38
  39 static const int32_t trigger_matches[] = {
  40         SR_TRIGGER_ZERO,
  41         SR_TRIGGER_ONE,
  42         SR_TRIGGER_RISING,
  43         SR_TRIGGER_FALLING,
  44 };
  45
  46 static void clear_helper(void *priv)
  47 {
  48         struct dev_context *devc;
  49
  50         devc = priv;
  51
  52         ftdi_free(devc->ftdic);
  53         g_free(devc->final_buf);
  54 }
  55
  56 static int dev_clear(const struct sr_dev_driver *di)
  57 {
  58         return std_dev_clear(di, clear_helper);
  59 }
  60
  61 static int add_device(int model, struct libusb_device_descriptor *des,
  62         const char *serial_num, const char *connection_id, libusb_device *usbdev,
  63         GSList **devices)
  64 {
  65         int ret;
  66         unsigned int i;
  67         struct sr_dev_inst *sdi;
  68         struct dev_context *devc;
  69
  70         ret = SR_OK;
  71
  72         /* Allocate memory for our private device context. */
  73         devc = g_malloc0(sizeof(struct dev_context));
  74
  75         /* Set some sane defaults. */
  76         devc->prof = &cv_profiles[model];
  77         devc->ftdic = NULL; /* Will be set in the open() API call. */
  78         devc->cur_samplerate = 0; /* Set later (different for LA8/LA16). */
  79         devc->limit_msec = 0;
  80         devc->limit_samples = 0;
  81         memset(devc->mangled_buf, 0, BS);
  82         devc->final_buf = NULL;
  83         devc->trigger_pattern = 0x0000; /* Irrelevant, see trigger_mask. */
  84         devc->trigger_mask = 0x0000; /* All channels: "don't care". */
  85         devc->trigger_edgemask = 0x0000; /* All channels: "state triggered". */
  86         devc->trigger_found = 0;
  87         devc->done = 0;
  88         devc->block_counter = 0;
  89         devc->divcount = 0;
  90         devc->usb_vid = des->idVendor;
  91         devc->usb_pid = des->idProduct;
  92         memset(devc->samplerates, 0, sizeof(uint64_t) * 255);
  93
  94         /* Allocate memory where we'll store the de-mangled data. */
  95         if (!(devc->final_buf = g_try_malloc(SDRAM_SIZE))) {
  96                 sr_err("Failed to allocate memory for sample buffer.");
  97                 ret = SR_ERR_MALLOC;
  98                 goto err_free_devc;
  99         }
 100
 101         /* We now know the device, set its max. samplerate as default. */
 102         devc->cur_samplerate = devc->prof->max_samplerate;
 103
 104         /* Register the device with libsigrok. */
 105         sdi = g_malloc0(sizeof(struct sr_dev_inst));
 106         sdi->status = SR_ST_INACTIVE;
 107         sdi->vendor = g_strdup("ChronoVu");
 108         sdi->model = g_strdup(devc->prof->modelname);
 109         sdi->serial_num = g_strdup(serial_num);
 110         sdi->connection_id = g_strdup(connection_id);
 111         sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(usbdev),
 112                 libusb_get_device_address(usbdev), NULL);
 113         sdi->priv = devc;
 114
 115         for (i = 0; i < devc->prof->num_channels; i++)
 116                 sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE,
 117                                 cv_channel_names[i]);
 118
 119         *devices = g_slist_append(*devices, sdi);
 120
 121         if (ret == SR_OK)
 122                 return SR_OK;
 123
 124 err_free_devc:
 125         g_free(devc);
 126
 127         return ret;
 128 }
 129
 130 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 131 {
 132         int i, ret, model;
 133         struct drv_context *drvc;
 134         GSList *devices, *conn_devices, *l;
 135         struct sr_usb_dev_inst *usb;
 136         struct sr_config *src;
 137         struct libusb_device_descriptor des;
 138         libusb_device **devlist;
 139         struct libusb_device_handle *hdl;
 140         const char *conn;
 141         char product[64], serial_num[64], connection_id[64];
 142
 143         drvc = di->context;
 144
 145         conn = NULL;
 146         for (l = options; l; l = l->next) {
 147                 src = l->data;
 148                 switch (src->key) {
 149                 case SR_CONF_CONN:
 150                         conn = g_variant_get_string(src->data, NULL);
 151                         break;
 152                 }
 153         }
 154         if (conn)
 155                 conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
 156         else
 157                 conn_devices = NULL;
 158
 159         devices = NULL;
 160         libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
 161
 162         for (i = 0; devlist[i]; i++) {
 163                 if (conn) {
 164                         for (l = conn_devices; l; l = l->next) {
 165                                 usb = l->data;
 166                                 if (usb->bus == libusb_get_bus_number(devlist[i])
 167                                         && usb->address == libusb_get_device_address(devlist[i]))
 168                                         break;
 169                         }
 170                         if (!l)
 171                                 /* This device matched none of the ones that
 172                                  * matched the conn specification. */
 173                                 continue;
 174                 }
 175
 176                 libusb_get_device_descriptor(devlist[i], &des);
 177
 178                 if ((ret = libusb_open(devlist[i], &hdl)) < 0)
 179                         continue;
 180
 181                 if (des.iProduct == 0) {
 182                         product[0] = '\0';
 183                 } else if ((ret = libusb_get_string_descriptor_ascii(hdl,
 184                                 des.iProduct, (unsigned char *)product,
 185                                 sizeof(product))) < 0) {
 186                         sr_warn("Failed to get product string descriptor: %s.",
 187                                 libusb_error_name(ret));
 188                         continue;
 189                 }
 190
 191                 if (des.iSerialNumber == 0) {
 192                         serial_num[0] = '\0';
 193                 } else if ((ret = libusb_get_string_descriptor_ascii(hdl,
 194                                 des.iSerialNumber, (unsigned char *)serial_num,
 195                                 sizeof(serial_num))) < 0) {
 196                         sr_warn("Failed to get serial number string descriptor: %s.",
 197                                 libusb_error_name(ret));
 198                         continue;
 199                 }
 200
 201                 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
 202
 203                 libusb_close(hdl);
 204
 205                 if (!strcmp(product, "ChronoVu LA8")) {
 206                         model = 0;
 207                 } else if (!strcmp(product, "ChronoVu LA16")) {
 208                         model = 1;
 209                 } else {
 210                         sr_spew("Unknown iProduct string '%s'.", product);
 211                         continue;
 212                 }
 213
 214                 sr_dbg("Found %s (%04x:%04x, %d.%d, %s).",
 215                        product, des.idVendor, des.idProduct,
 216                        libusb_get_bus_number(devlist[i]),
 217                        libusb_get_device_address(devlist[i]), connection_id);
 218
 219                 if ((ret = add_device(model, &des, serial_num, connection_id,
 220                                         devlist[i], &devices)) < 0) {
 221                         sr_dbg("Failed to add device: %d.", ret);
 222                 }
 223         }
 224
 225         libusb_free_device_list(devlist, 1);
 226         g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);
 227
 228         return std_scan_complete(di, devices);
 229 }
 230
 231 static int dev_open(struct sr_dev_inst *sdi)
 232 {
 233         struct dev_context *devc;
 234         int ret;
 235
 236         devc = sdi->priv;
 237
 238         /* Allocate memory for the FTDI context and initialize it. */
 239         if (!(devc->ftdic = ftdi_new())) {
 240                 sr_err("Failed to initialize libftdi.");
 241                 return SR_ERR;
 242         }
 243
 244         sr_dbg("Opening %s device (%04x:%04x).", devc->prof->modelname,
 245                devc->usb_vid, devc->usb_pid);
 246
 247         /* Open the device. */
 248         if ((ret = ftdi_usb_open_desc(devc->ftdic, devc->usb_vid,
 249                         devc->usb_pid, devc->prof->iproduct, NULL)) < 0) {
 250                 sr_err("Failed to open FTDI device (%d): %s.",
 251                        ret, ftdi_get_error_string(devc->ftdic));
 252                 goto err_ftdi_free;
 253         }
 254         sr_dbg("Device opened successfully.");
 255
 256         /* Purge RX/TX buffers in the FTDI chip. */
 257         if ((ret = ftdi_usb_purge_buffers(devc->ftdic)) < 0) {
 258                 sr_err("Failed to purge FTDI buffers (%d): %s.",
 259                        ret, ftdi_get_error_string(devc->ftdic));
 260                 goto err_ftdi_free;
 261         }
 262         sr_dbg("FTDI buffers purged successfully.");
 263
 264         /* Enable flow control in the FTDI chip. */
 265         if ((ret = ftdi_setflowctrl(devc->ftdic, SIO_RTS_CTS_HS)) < 0) {
 266                 sr_err("Failed to enable FTDI flow control (%d): %s.",
 267                        ret, ftdi_get_error_string(devc->ftdic));
 268                 goto err_ftdi_free;
 269         }
 270         sr_dbg("FTDI flow control enabled successfully.");
 271
 272         /* Wait 100ms. */
 273         g_usleep(100 * 1000);
 274
 275         sdi->status = SR_ST_ACTIVE;
 276
 277         if (ret == SR_OK)
 278                 return SR_OK;
 279
 280 err_ftdi_free:
 281         ftdi_free(devc->ftdic); /* Close device (if open), free FTDI context. */
 282         devc->ftdic = NULL;
 283         return ret;
 284 }
 285
 286 static int dev_close(struct sr_dev_inst *sdi)
 287 {
 288         int ret;
 289         struct dev_context *devc;
 290
 291         if (sdi->status != SR_ST_ACTIVE)
 292                 return SR_OK;
 293
 294         devc = sdi->priv;
 295
 296         if (devc->ftdic && (ret = ftdi_usb_close(devc->ftdic)) < 0)
 297                 sr_err("Failed to close FTDI device (%d): %s.",
 298                        ret, ftdi_get_error_string(devc->ftdic));
 299         sdi->status = SR_ST_INACTIVE;
 300
 301         return SR_OK;
 302 }
 303
 304 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 305                 const struct sr_channel_group *cg)
 306 {
 307         struct dev_context *devc;
 308         struct sr_usb_dev_inst *usb;
 309         char str[128];
 310
 311         (void)cg;
 312
 313         switch (key) {
 314         case SR_CONF_CONN:
 315                 if (!sdi || !(usb = sdi->conn))
 316                         return SR_ERR_ARG;
 317                 snprintf(str, 128, "%d.%d", usb->bus, usb->address);
 318                 *data = g_variant_new_string(str);
 319                 break;
 320         case SR_CONF_SAMPLERATE:
 321                 if (!sdi)
 322                         return SR_ERR_BUG;
 323                 devc = sdi->priv;
 324                 *data = g_variant_new_uint64(devc->cur_samplerate);
 325                 break;
 326         default:
 327                 return SR_ERR_NA;
 328         }
 329
 330         return SR_OK;
 331 }
 332
 333 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 334                 const struct sr_channel_group *cg)
 335 {
 336         struct dev_context *devc;
 337
 338         (void)cg;
 339
 340         devc = sdi->priv;
 341
 342         switch (key) {
 343         case SR_CONF_SAMPLERATE:
 344                 if (cv_set_samplerate(sdi, g_variant_get_uint64(data)) < 0)
 345                         return SR_ERR;
 346                 break;
 347         case SR_CONF_LIMIT_MSEC:
 348                 if (g_variant_get_uint64(data) == 0)
 349                         return SR_ERR_ARG;
 350                 devc->limit_msec = g_variant_get_uint64(data);
 351                 break;
 352         case SR_CONF_LIMIT_SAMPLES:
 353                 if (g_variant_get_uint64(data) == 0)
 354                         return SR_ERR_ARG;
 355                 devc->limit_samples = g_variant_get_uint64(data);
 356                 break;
 357         default:
 358                 return SR_ERR_NA;
 359         }
 360
 361         return SR_OK;
 362 }
 363
 364 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 365                 const struct sr_channel_group *cg)
 366 {
 367         GVariant *gvar, *grange[2];
 368         GVariantBuilder gvb;
 369         struct dev_context *devc;
 370
 371         (void)cg;
 372
 373         switch (key) {
 374         case SR_CONF_SCAN_OPTIONS:
 375                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 376                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 377                 break;
 378         case SR_CONF_DEVICE_OPTIONS:
 379                 if (!sdi)
 380                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 381                                         drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
 382                 else
 383                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 384                                         devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 385                 break;
 386         case SR_CONF_SAMPLERATE:
 387                 if (!sdi)
 388                         return SR_ERR_BUG;
 389                 devc = sdi->priv;
 390                 cv_fill_samplerates_if_needed(sdi);
 391                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 392                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
 393                                 devc->samplerates,
 394                                 ARRAY_SIZE(devc->samplerates),
 395                                 sizeof(uint64_t));
 396                 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
 397                 *data = g_variant_builder_end(&gvb);
 398                 break;
 399         case SR_CONF_LIMIT_SAMPLES:
 400                 if (!sdi || !sdi->priv || !(devc = sdi->priv) || !devc->prof)
 401                         return SR_ERR_BUG;
 402                 grange[0] = g_variant_new_uint64(0);
 403                 if (devc->prof->model == CHRONOVU_LA8)
 404                         grange[1] = g_variant_new_uint64(MAX_NUM_SAMPLES);
 405                 else
 406                         grange[1] = g_variant_new_uint64(MAX_NUM_SAMPLES / 2);
 407                 *data = g_variant_new_tuple(grange, 2);
 408                 break;
 409         case SR_CONF_TRIGGER_MATCH:
 410                 if (!sdi || !sdi->priv || !(devc = sdi->priv) || !devc->prof)
 411                         return SR_ERR_BUG;
 412                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 413                                 trigger_matches, devc->prof->num_trigger_matches,
 414                                 sizeof(int32_t));
 415                 break;
 416         default:
 417                 return SR_ERR_NA;
 418         }
 419
 420         return SR_OK;
 421 }
 422
 423 static int receive_data(int fd, int revents, void *cb_data)
 424 {
 425         int i, ret;
 426         struct sr_dev_inst *sdi;
 427         struct dev_context *devc;
 428
 429         (void)fd;
 430         (void)revents;
 431
 432         if (!(sdi = cb_data)) {
 433                 sr_err("cb_data was NULL.");
 434                 return FALSE;
 435         }
 436
 437         if (!(devc = sdi->priv)) {
 438                 sr_err("sdi->priv was NULL.");
 439                 return FALSE;
 440         }
 441
 442         if (!devc->ftdic) {
 443                 sr_err("devc->ftdic was NULL.");
 444                 return FALSE;
 445         }
 446
 447         /* Get one block of data. */
 448         if ((ret = cv_read_block(devc)) < 0) {
 449                 sr_err("Failed to read data block: %d.", ret);
 450                 sr_dev_acquisition_stop(sdi);
 451                 return FALSE;
 452         }
 453
 454         /* We need to get exactly NUM_BLOCKS blocks (i.e. 8MB) of data. */
 455         if (devc->block_counter != (NUM_BLOCKS - 1)) {
 456                 devc->block_counter++;
 457                 return TRUE;
 458         }
 459
 460         sr_dbg("Sampling finished, sending data to session bus now.");
 461
 462         /*
 463          * All data was received and demangled, send it to the session bus.
 464          *
 465          * Note: Due to the method how data is spread across the 8MByte of
 466          * SDRAM, we can _not_ send it to the session bus in a streaming
 467          * manner while we receive it. We have to receive and de-mangle the
 468          * full 8MByte first, only then the whole buffer contains valid data.
 469          */
 470         for (i = 0; i < NUM_BLOCKS; i++)
 471                 cv_send_block_to_session_bus(sdi, i);
 472
 473         sr_dev_acquisition_stop(sdi);
 474
 475         return TRUE;
 476 }
 477
 478 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 479 {
 480         struct dev_context *devc;
 481         uint8_t buf[8];
 482         int bytes_to_write, bytes_written;
 483
 484         devc = sdi->priv;
 485
 486         if (!devc->ftdic) {
 487                 sr_err("devc->ftdic was NULL.");
 488                 return SR_ERR_BUG;
 489         }
 490
 491         devc->divcount = cv_samplerate_to_divcount(sdi, devc->cur_samplerate);
 492         if (devc->divcount == 0xff) {
 493                 sr_err("Invalid divcount/samplerate.");
 494                 return SR_ERR;
 495         }
 496
 497         if (cv_convert_trigger(sdi) != SR_OK) {
 498                 sr_err("Failed to configure trigger.");
 499                 return SR_ERR;
 500         }
 501
 502         /* Fill acquisition parameters into buf[]. */
 503         if (devc->prof->model == CHRONOVU_LA8) {
 504                 buf[0] = devc->divcount;
 505                 buf[1] = 0xff; /* This byte must always be 0xff. */
 506                 buf[2] = devc->trigger_pattern & 0xff;
 507                 buf[3] = devc->trigger_mask & 0xff;
 508                 bytes_to_write = 4;
 509         } else {
 510                 buf[0] = devc->divcount;
 511                 buf[1] = 0xff; /* This byte must always be 0xff. */
 512                 buf[2] = (devc->trigger_pattern & 0xff00) >> 8;  /* LSB */
 513                 buf[3] = (devc->trigger_pattern & 0x00ff) >> 0;  /* MSB */
 514                 buf[4] = (devc->trigger_mask & 0xff00) >> 8;     /* LSB */
 515                 buf[5] = (devc->trigger_mask & 0x00ff) >> 0;     /* MSB */
 516                 buf[6] = (devc->trigger_edgemask & 0xff00) >> 8; /* LSB */
 517                 buf[7] = (devc->trigger_edgemask & 0x00ff) >> 0; /* MSB */
 518                 bytes_to_write = 8;
 519         }
 520
 521         /* Start acquisition. */
 522         bytes_written = cv_write(devc, buf, bytes_to_write);
 523
 524         if (bytes_written < 0 || bytes_written != bytes_to_write) {
 525                 sr_err("Acquisition failed to start.");
 526                 return SR_ERR;
 527         }
 528
 529         sr_dbg("Hardware acquisition started successfully.");
 530
 531         std_session_send_df_header(sdi);
 532
 533         /* Time when we should be done (for detecting trigger timeouts). */
 534         devc->done = (devc->divcount + 1) * devc->prof->trigger_constant +
 535                         g_get_monotonic_time() + (10 * G_TIME_SPAN_SECOND);
 536         devc->block_counter = 0;
 537         devc->trigger_found = 0;
 538
 539         /* Hook up a dummy handler to receive data from the device. */
 540         sr_session_source_add(sdi->session, -1, 0, 0, receive_data, (void *)sdi);
 541
 542         return SR_OK;
 543 }
 544
 545 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 546 {
 547         sr_session_source_remove(sdi->session, -1);
 548         std_session_send_df_end(sdi);
 549
 550         return SR_OK;
 551 }
 552
 553 static struct sr_dev_driver chronovu_la_driver_info = {
 554         .name = "chronovu-la",
 555         .longname = "ChronoVu LA8/LA16",
 556         .api_version = 1,
 557         .init = std_init,
 558         .cleanup = std_cleanup,
 559         .scan = scan,
 560         .dev_list = std_dev_list,
 561         .dev_clear = dev_clear,
 562         .config_get = config_get,
 563         .config_set = config_set,
 564         .config_list = config_list,
 565         .dev_open = dev_open,
 566         .dev_close = dev_close,
 567         .dev_acquisition_start = dev_acquisition_start,
 568         .dev_acquisition_stop = dev_acquisition_stop,
 569         .context = NULL,
 570 };
 571 SR_REGISTER_DEV_DRIVER(chronovu_la_driver_info);