hardware/kecheng-kc-330b/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
   5  *
   6  * This program is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <string.h>
  21 #include "protocol.h"
  22
  23 #define USB_CONN "1041.8101"
  24 #define VENDOR "Kecheng"
  25 #define USB_INTERFACE 0
  26
  27 static const int32_t hwcaps[] = {
  28         SR_CONF_SOUNDLEVELMETER,
  29         SR_CONF_LIMIT_SAMPLES,
  30         SR_CONF_CONTINUOUS,
  31         SR_CONF_DATALOG,
  32         SR_CONF_SPL_WEIGHT_FREQ,
  33         SR_CONF_SPL_WEIGHT_TIME,
  34         SR_CONF_DATA_SOURCE,
  35 };
  36
  37 SR_PRIV const uint64_t kecheng_kc_330b_sample_intervals[][2] = {
  38         { 1, 8 },
  39         { 1, 2 },
  40         { 1, 1 },
  41         { 2, 1 },
  42         { 5, 1 },
  43         { 10, 1 },
  44         { 60, 1 },
  45 };
  46
  47 static const char *weight_freq[] = {
  48         "A",
  49         "C",
  50 };
  51
  52 static const char *weight_time[] = {
  53         "F",
  54         "S",
  55 };
  56
  57 static const char *data_sources[] = {
  58         "Live",
  59         "Memory",
  60 };
  61
  62 SR_PRIV struct sr_dev_driver kecheng_kc_330b_driver_info;
  63 static struct sr_dev_driver *di = &kecheng_kc_330b_driver_info;
  64
  65
  66 static int init(struct sr_context *sr_ctx)
  67 {
  68         return std_init(sr_ctx, di, LOG_PREFIX);
  69 }
  70
  71 static int scan_kecheng(struct sr_usb_dev_inst *usb, char **model)
  72 {
  73         struct drv_context *drvc;
  74         int len, ret;
  75         unsigned char cmd, buf[32];
  76
  77         drvc = di->priv;
  78         if (sr_usb_open(drvc->sr_ctx->libusb_ctx, usb) != SR_OK)
  79                 return SR_ERR;
  80
  81         cmd = CMD_IDENTIFY;
  82         ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, &cmd, 1, &len, 5);
  83         if (ret != 0) {
  84                 libusb_close(usb->devhdl);
  85                 sr_dbg("Failed to send Identify command: %s", libusb_error_name(ret));
  86                 return SR_ERR;
  87         }
  88
  89         ret = libusb_bulk_transfer(usb->devhdl, EP_IN, buf, 32, &len, 10);
  90         if (ret != 0) {
  91                 libusb_close(usb->devhdl);
  92                 sr_dbg("Failed to receive response: %s", libusb_error_name(ret));
  93                 return SR_ERR;
  94         }
  95
  96         libusb_close(usb->devhdl);
  97         usb->devhdl = NULL;
  98
  99         if (len < 2 || buf[0] != (CMD_IDENTIFY | 0x80) || buf[1] > 30) {
 100                 sr_dbg("Invalid response to Identify command");
 101                 return SR_ERR;
 102         }
 103
 104         buf[buf[1] + 2] = '\x0';
 105         *model = g_strndup((const gchar *)buf + 2, 30);
 106
 107         return SR_OK;
 108 }
 109
 110 static GSList *scan(GSList *options)
 111 {
 112         struct drv_context *drvc;
 113         struct dev_context *devc;
 114         struct sr_dev_inst *sdi;
 115         struct sr_probe *probe;
 116         GSList *usb_devices, *devices, *l;
 117         char *model;
 118
 119         (void)options;
 120
 121         drvc = di->priv;
 122         drvc->instances = NULL;
 123
 124         devices = NULL;
 125         if ((usb_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, USB_CONN))) {
 126                 /* We have a list of sr_usb_dev_inst matching the connection
 127                  * string. Wrap them in sr_dev_inst and we're done. */
 128                 for (l = usb_devices; l; l = l->next) {
 129                         if (scan_kecheng(l->data, &model) != SR_OK)
 130                                 continue;
 131                         if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, VENDOR,
 132                                         model, NULL)))
 133                                 return NULL;
 134                         g_free(model);
 135                         sdi->driver = di;
 136                         sdi->inst_type = SR_INST_USB;
 137                         sdi->conn = l->data;
 138                         if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "SPL")))
 139                                 return NULL;
 140                         sdi->probes = g_slist_append(sdi->probes, probe);
 141
 142                         if (!(devc = g_try_malloc(sizeof(struct dev_context)))) {
 143                                 sr_dbg("Device context malloc failed.");
 144                                 return NULL;
 145                         }
 146                         sdi->priv = devc;
 147                         devc->limit_samples = 0;
 148                         /* The protocol provides no way to read the current
 149                          * settings, so we'll enforce these. */
 150                         devc->sample_interval = DEFAULT_SAMPLE_INTERVAL;
 151                         devc->alarm_low = DEFAULT_ALARM_LOW;
 152                         devc->alarm_high = DEFAULT_ALARM_HIGH;
 153                         devc->mqflags = DEFAULT_WEIGHT_TIME | DEFAULT_WEIGHT_FREQ;
 154                         devc->data_source = DEFAULT_DATA_SOURCE;
 155                         devc->config_dirty = FALSE;
 156
 157                         /* TODO: Set date/time? */
 158
 159                         drvc->instances = g_slist_append(drvc->instances, sdi);
 160                         devices = g_slist_append(devices, sdi);
 161                 }
 162                 g_slist_free(usb_devices);
 163         } else
 164                 g_slist_free_full(usb_devices, g_free);
 165
 166         return devices;
 167 }
 168
 169 static GSList *dev_list(void)
 170 {
 171         struct drv_context *drvc;
 172
 173         drvc = di->priv;
 174
 175         return drvc->instances;
 176 }
 177
 178 static int dev_clear(void)
 179 {
 180         return std_dev_clear(di, NULL);
 181 }
 182
 183 static int dev_open(struct sr_dev_inst *sdi)
 184 {
 185         struct drv_context *drvc;
 186         struct sr_usb_dev_inst *usb;
 187         int ret;
 188
 189         if (!(drvc = di->priv)) {
 190                 sr_err("Driver was not initialized.");
 191                 return SR_ERR;
 192         }
 193
 194         usb = sdi->conn;
 195
 196         if (sr_usb_open(drvc->sr_ctx->libusb_ctx, usb) != SR_OK)
 197                 return SR_ERR;
 198
 199         if ((ret = libusb_set_configuration(usb->devhdl, 1))) {
 200                 sr_err("Failed to set configuration: %s.", libusb_error_name(ret));
 201                 return SR_ERR;
 202         }
 203
 204         if ((ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE))) {
 205                 sr_err("Failed to claim interface: %s.", libusb_error_name(ret));
 206                 return SR_ERR;
 207         }
 208         sdi->status = SR_ST_ACTIVE;
 209
 210         return ret;
 211 }
 212
 213 static int dev_close(struct sr_dev_inst *sdi)
 214 {
 215         struct dev_context *devc;
 216         struct sr_usb_dev_inst *usb;
 217
 218         if (!di->priv) {
 219                 sr_err("Driver was not initialized.");
 220                 return SR_ERR;
 221         }
 222
 223         usb = sdi->conn;
 224
 225         if (!usb->devhdl)
 226                 /*  Nothing to do. */
 227                 return SR_OK;
 228
 229         /* This allows a frontend to configure the device without ever
 230          * doing an acquisition step. */
 231         devc = sdi->priv;
 232         if (!devc->config_dirty)
 233                 kecheng_kc_330b_configure(sdi);
 234
 235         libusb_release_interface(usb->devhdl, USB_INTERFACE);
 236         libusb_close(usb->devhdl);
 237         usb->devhdl = NULL;
 238         sdi->status = SR_ST_INACTIVE;
 239
 240         return SR_OK;
 241 }
 242
 243 static int cleanup(void)
 244 {
 245         int ret;
 246         struct drv_context *drvc;
 247
 248         if (!(drvc = di->priv))
 249                 /* Can get called on an unused driver, doesn't matter. */
 250                 return SR_OK;
 251
 252         ret = dev_clear();
 253         g_free(drvc);
 254         di->priv = NULL;
 255
 256         return ret;
 257 }
 258
 259 static int config_get(int key, GVariant **data, const struct sr_dev_inst *sdi)
 260 {
 261         struct dev_context *devc;
 262         GVariant *rational[2];
 263         const uint64_t *si;
 264         int tmp, ret;
 265
 266         devc = sdi->priv;
 267         switch (key) {
 268         case SR_CONF_LIMIT_SAMPLES:
 269                 *data = g_variant_new_uint64(devc->limit_samples);
 270                 break;
 271         case SR_CONF_SAMPLE_INTERVAL:
 272                 si = kecheng_kc_330b_sample_intervals[devc->sample_interval];
 273                 rational[0] = g_variant_new_uint64(si[0]);
 274                 rational[1] = g_variant_new_uint64(si[1]);
 275                 *data = g_variant_new_tuple(rational, 2);
 276                 break;
 277         case SR_CONF_DATALOG:
 278                 /* There really isn't a way to be sure the device is logging. */
 279                 return SR_ERR_NA;
 280                 break;
 281         case SR_CONF_SPL_WEIGHT_FREQ:
 282                 if (devc->mqflags & SR_MQFLAG_SPL_FREQ_WEIGHT_A)
 283                         *data = g_variant_new_string("A");
 284                 else
 285                         *data = g_variant_new_string("C");
 286                 break;
 287         case SR_CONF_SPL_WEIGHT_TIME:
 288                 if (devc->mqflags & SR_MQFLAG_SPL_TIME_WEIGHT_F)
 289                         *data = g_variant_new_string("F");
 290                 else
 291                         *data = g_variant_new_string("S");
 292                 break;
 293         case SR_CONF_DATA_SOURCE:
 294                 if (devc->data_source == DATA_SOURCE_LIVE)
 295                         *data = g_variant_new_string("Live");
 296                 else
 297                         *data = g_variant_new_string("Memory");
 298                 break;
 299         default:
 300                 return SR_ERR_NA;
 301         }
 302
 303         return SR_OK;
 304 }
 305
 306 static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi)
 307 {
 308         struct dev_context *devc;
 309         uint64_t p, q;
 310         unsigned int i;
 311         int tmp, ret;
 312         const char *tmp_str;
 313
 314         if (sdi->status != SR_ST_ACTIVE)
 315                 return SR_ERR_DEV_CLOSED;
 316
 317         if (!di->priv) {
 318                 sr_err("Driver was not initialized.");
 319                 return SR_ERR;
 320         }
 321
 322         devc = sdi->priv;
 323         ret = SR_OK;
 324         switch (key) {
 325         case SR_CONF_LIMIT_SAMPLES:
 326                 devc->limit_samples = g_variant_get_uint64(data);
 327                 sr_dbg("Setting sample limit to %" PRIu64 ".",
 328                        devc->limit_samples);
 329                 break;
 330         case SR_CONF_SAMPLE_INTERVAL:
 331                 g_variant_get(data, "(tt)", &p, &q);
 332                 for (i = 0; i < ARRAY_SIZE(kecheng_kc_330b_sample_intervals); i++) {
 333                         if (kecheng_kc_330b_sample_intervals[i][0] != p || kecheng_kc_330b_sample_intervals[i][1] != q)
 334                                 continue;
 335                         devc->sample_interval = i;
 336                         devc->config_dirty = TRUE;
 337                         break;
 338                 }
 339                 if (i == ARRAY_SIZE(kecheng_kc_330b_sample_intervals))
 340                         ret = SR_ERR_ARG;
 341                 break;
 342         case SR_CONF_SPL_WEIGHT_FREQ:
 343                 tmp_str = g_variant_get_string(data, NULL);
 344                 if (!strcmp(tmp_str, "A"))
 345                         tmp = SR_MQFLAG_SPL_FREQ_WEIGHT_A;
 346                 else if (!strcmp(tmp_str, "C"))
 347                         tmp = SR_MQFLAG_SPL_FREQ_WEIGHT_C;
 348                 else
 349                         return SR_ERR_ARG;
 350                 devc->mqflags &= ~(SR_MQFLAG_SPL_FREQ_WEIGHT_A | SR_MQFLAG_SPL_FREQ_WEIGHT_C);
 351                 devc->mqflags |= tmp;
 352                 devc->config_dirty = TRUE;
 353                 break;
 354         case SR_CONF_SPL_WEIGHT_TIME:
 355                 tmp_str = g_variant_get_string(data, NULL);
 356                 if (!strcmp(tmp_str, "F"))
 357                         tmp = SR_MQFLAG_SPL_TIME_WEIGHT_F;
 358                 else if (!strcmp(tmp_str, "S"))
 359                         tmp = SR_MQFLAG_SPL_TIME_WEIGHT_S;
 360                 else
 361                         return SR_ERR_ARG;
 362                 devc->mqflags &= ~(SR_MQFLAG_SPL_TIME_WEIGHT_F | SR_MQFLAG_SPL_TIME_WEIGHT_S);
 363                 devc->mqflags |= tmp;
 364                 devc->config_dirty = TRUE;
 365                 break;
 366         case SR_CONF_DATA_SOURCE:
 367                 tmp_str = g_variant_get_string(data, NULL);
 368                 if (!strcmp(tmp_str, "Live"))
 369                         devc->data_source = DATA_SOURCE_LIVE;
 370                 else if (!strcmp(tmp_str, "Memory"))
 371                         devc->data_source = DATA_SOURCE_MEMORY;
 372                 else
 373                         return SR_ERR;
 374                 devc->config_dirty = TRUE;
 375                 break;
 376         default:
 377                 ret = SR_ERR_NA;
 378         }
 379
 380         return ret;
 381 }
 382
 383 static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi)
 384 {
 385         GVariant *tuple, *rational[2];
 386         GVariantBuilder gvb;
 387         unsigned int i;
 388
 389         (void)sdi;
 390
 391         switch (key) {
 392         case SR_CONF_DEVICE_OPTIONS:
 393                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 394                                 hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
 395                 break;
 396         case SR_CONF_SAMPLE_INTERVAL:
 397                 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 398                 for (i = 0; i < ARRAY_SIZE(kecheng_kc_330b_sample_intervals); i++) {
 399                         rational[0] = g_variant_new_uint64(kecheng_kc_330b_sample_intervals[i][0]);
 400                         rational[1] = g_variant_new_uint64(kecheng_kc_330b_sample_intervals[i][1]);
 401                         tuple = g_variant_new_tuple(rational, 2);
 402                         g_variant_builder_add_value(&gvb, tuple);
 403                 }
 404                 *data = g_variant_builder_end(&gvb);
 405                 break;
 406         case SR_CONF_SPL_WEIGHT_FREQ:
 407                 *data = g_variant_new_strv(weight_freq, ARRAY_SIZE(weight_freq));
 408                 break;
 409         case SR_CONF_SPL_WEIGHT_TIME:
 410                 *data = g_variant_new_strv(weight_time, ARRAY_SIZE(weight_time));
 411                 break;
 412         case SR_CONF_DATA_SOURCE:
 413                 *data = g_variant_new_strv(data_sources, ARRAY_SIZE(data_sources));
 414                 break;
 415         default:
 416                 return SR_ERR_NA;
 417         }
 418
 419         return SR_OK;
 420 }
 421
 422 static int dev_acquisition_start(const struct sr_dev_inst *sdi,
 423                 void *cb_data)
 424 {
 425         struct drv_context *drvc;
 426         struct dev_context *devc;
 427         struct sr_datafeed_packet packet;
 428         struct sr_datafeed_meta meta;
 429         struct sr_config *src;
 430         struct sr_usb_dev_inst *usb;
 431         GVariant *gvar, *rational[2];
 432         const struct libusb_pollfd **pfd;
 433         const uint64_t *si;
 434         int stored_mqflags, req_len, buf_len, len, ret, i;
 435         unsigned char buf[9];
 436
 437         if (sdi->status != SR_ST_ACTIVE)
 438                 return SR_ERR_DEV_CLOSED;
 439
 440         drvc = di->priv;
 441         devc = sdi->priv;
 442         usb = sdi->conn;
 443
 444         devc->cb_data = cb_data;
 445         devc->num_samples = 0;
 446
 447         /* Send header packet to the session bus. */
 448         std_session_send_df_header(cb_data, LOG_PREFIX);
 449
 450         if (devc->data_source == DATA_SOURCE_LIVE) {
 451                 /* Force configuration. */
 452                 kecheng_kc_330b_configure(sdi);
 453
 454                 if (kecheng_kc_330b_status_get(sdi, &ret) != SR_OK)
 455                         return SR_ERR;
 456                 if (ret != DEVICE_ACTIVE) {
 457                         sr_err("Device is inactive");
 458                         /* Still continue though, since the device will
 459                          * just return 30.0 until the user hits the button
 460                          * on the device -- and then start feeding good
 461                          * samples back. */
 462                 }
 463         } else {
 464                 if (kecheng_kc_330b_log_info_get(sdi, buf) != SR_OK)
 465                         return SR_ERR;
 466                 stored_mqflags = buf[4] ? SR_MQFLAG_SPL_TIME_WEIGHT_S : SR_MQFLAG_SPL_TIME_WEIGHT_F;
 467                 stored_mqflags |= buf[5] ? SR_MQFLAG_SPL_FREQ_WEIGHT_C : SR_MQFLAG_SPL_FREQ_WEIGHT_A;
 468                 devc->stored_samples = (buf[7] << 8) | buf[8];
 469                 if (devc->stored_samples == 0) {
 470                         /* Notify frontend of empty log by sending start/end packets. */
 471                         packet.type = SR_DF_END;
 472                         sr_session_send(cb_data, &packet);
 473                         return SR_OK;
 474                 }
 475
 476                 if (devc->limit_samples && devc->limit_samples < devc->stored_samples)
 477                         devc->stored_samples = devc->limit_samples;
 478
 479                 si = kecheng_kc_330b_sample_intervals[buf[1]];
 480                 rational[0] = g_variant_new_uint64(si[0]);
 481                 rational[1] = g_variant_new_uint64(si[1]);
 482                 gvar = g_variant_new_tuple(rational, 2);
 483                 src = sr_config_new(SR_CONF_SAMPLE_INTERVAL, gvar);
 484                 packet.type = SR_DF_META;
 485                 packet.payload = &meta;
 486                 meta.config = g_slist_append(NULL, src);
 487                 sr_session_send(devc->cb_data, &packet);
 488                 g_free(src);
 489         }
 490
 491         if (!(devc->xfer = libusb_alloc_transfer(0)))
 492                 return SR_ERR;
 493
 494         pfd = libusb_get_pollfds(drvc->sr_ctx->libusb_ctx);
 495         for (i = 0; pfd[i]; i++) {
 496                 /* Handle USB events every 10ms. */
 497                 sr_source_add(pfd[i]->fd, pfd[i]->events, 10,
 498                                 kecheng_kc_330b_handle_events, (void *)sdi);
 499                 /* We'll need to remove this fd later. */
 500                 devc->usbfd[i] = pfd[i]->fd;
 501         }
 502         devc->usbfd[i] = -1;
 503
 504         if (devc->data_source == DATA_SOURCE_LIVE) {
 505                 buf[0] = CMD_GET_LIVE_SPL;
 506                 buf_len = 1;
 507                 devc->state = LIVE_SPL_WAIT;
 508                 devc->last_live_request = g_get_monotonic_time() / 1000;
 509                 req_len = 3;
 510         } else {
 511                 buf[0] = CMD_GET_LOG_DATA;
 512                 buf[1] = 0;
 513                 buf[2] = 0;
 514                 buf_len = 4;
 515                 devc->state = LOG_DATA_WAIT;
 516                 if (devc->stored_samples < 63)
 517                         buf[3] = devc->stored_samples;
 518                 else
 519                         buf[3] = 63;
 520                 /* Command ack byte + 2 bytes per sample. */
 521                 req_len = 1 + buf[3] * 2;
 522         }
 523
 524         ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, buf, buf_len, &len, 5);
 525         if (ret != 0 || len != 1) {
 526                 sr_dbg("Failed to start acquisition: %s", libusb_error_name(ret));
 527                 libusb_free_transfer(devc->xfer);
 528                 return SR_ERR;
 529         }
 530
 531         libusb_fill_bulk_transfer(devc->xfer, usb->devhdl, EP_IN, devc->buf,
 532                         req_len, kecheng_kc_330b_receive_transfer, (void *)sdi, 15);
 533         if (libusb_submit_transfer(devc->xfer) != 0) {
 534                 libusb_free_transfer(devc->xfer);
 535                 return SR_ERR;
 536         }
 537
 538         return SR_OK;
 539 }
 540
 541 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 542 {
 543         struct dev_context *devc;
 544
 545         (void)cb_data;
 546
 547         if (sdi->status != SR_ST_ACTIVE)
 548                 return SR_ERR_DEV_CLOSED;
 549
 550         /* Signal USB transfer handler to clean up and stop. */
 551         sdi->status = SR_ST_STOPPING;
 552
 553         devc = sdi->priv;
 554         if (devc->data_source == DATA_SOURCE_MEMORY && devc->config_dirty) {
 555                 /* The protocol doesn't have a command to clear stored data;
 556                  * it clears it whenever new configuration is set. That means
 557                  * we can't just configure the device any time we want when
 558                  * it's in DATA_SOURCE_MEMORY mode. The only safe time to do
 559                  * it is now, when we're sure we've pulled in all the stored
 560                  * data. */
 561                 kecheng_kc_330b_configure(sdi);
 562         }
 563
 564         return SR_OK;
 565 }
 566
 567 SR_PRIV struct sr_dev_driver kecheng_kc_330b_driver_info = {
 568         .name = "kecheng-kc-330b",
 569         .longname = "Kecheng KC-330B",
 570         .api_version = 1,
 571         .init = init,
 572         .cleanup = cleanup,
 573         .scan = scan,
 574         .dev_list = dev_list,
 575         .dev_clear = dev_clear,
 576         .config_get = config_get,
 577         .config_set = config_set,
 578         .config_list = config_list,
 579         .dev_open = dev_open,
 580         .dev_close = dev_close,
 581         .dev_acquisition_start = dev_acquisition_start,
 582         .dev_acquisition_stop = dev_acquisition_stop,
 583         .priv = NULL,
 584 };