src/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 <config.h>
  21 #include <string.h>
  22 #include "protocol.h"
  23
  24 #define USB_CONN "1041.8101"
  25 #define VENDOR "Kecheng"
  26 #define USB_INTERFACE 0
  27
  28 static const uint32_t devopts[] = {
  29         SR_CONF_SOUNDLEVELMETER,
  30         SR_CONF_CONTINUOUS,
  31         SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET,
  32         SR_CONF_SAMPLE_INTERVAL | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  33         SR_CONF_DATALOG | SR_CONF_GET,
  34         SR_CONF_SPL_WEIGHT_FREQ | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  35         SR_CONF_SPL_WEIGHT_TIME | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  36         SR_CONF_DATA_SOURCE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  37 };
  38
  39 SR_PRIV const uint64_t kecheng_kc_330b_sample_intervals[][2] = {
  40         { 1, 8 },
  41         { 1, 2 },
  42         { 1, 1 },
  43         { 2, 1 },
  44         { 5, 1 },
  45         { 10, 1 },
  46         { 60, 1 },
  47 };
  48
  49 static const char *weight_freq[] = {
  50         "A",
  51         "C",
  52 };
  53
  54 static const char *weight_time[] = {
  55         "F",
  56         "S",
  57 };
  58
  59 static const char *data_sources[] = {
  60         "Live",
  61         "Memory",
  62 };
  63
  64 SR_PRIV struct sr_dev_driver kecheng_kc_330b_driver_info;
  65
  66 static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx)
  67 {
  68         return std_init(sr_ctx, di, LOG_PREFIX);
  69 }
  70
  71 static int scan_kecheng(struct sr_dev_driver *di,
  72                 struct sr_usb_dev_inst *usb, char **model)
  73 {
  74         struct drv_context *drvc;
  75         int len, ret;
  76         unsigned char cmd, buf[32];
  77
  78         drvc = di->context;
  79         if (sr_usb_open(drvc->sr_ctx->libusb_ctx, usb) != SR_OK)
  80                 return SR_ERR;
  81
  82         cmd = CMD_IDENTIFY;
  83         ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, &cmd, 1, &len, 5);
  84         if (ret != 0) {
  85                 libusb_close(usb->devhdl);
  86                 sr_dbg("Failed to send Identify command: %s", libusb_error_name(ret));
  87                 return SR_ERR;
  88         }
  89
  90         ret = libusb_bulk_transfer(usb->devhdl, EP_IN, buf, 32, &len, 10);
  91         if (ret != 0) {
  92                 libusb_close(usb->devhdl);
  93                 sr_dbg("Failed to receive response: %s", libusb_error_name(ret));
  94                 return SR_ERR;
  95         }
  96
  97         libusb_close(usb->devhdl);
  98         usb->devhdl = NULL;
  99
 100         if (len < 2 || buf[0] != (CMD_IDENTIFY | 0x80) || buf[1] > 30) {
 101                 sr_dbg("Invalid response to Identify command");
 102                 return SR_ERR;
 103         }
 104
 105         buf[buf[1] + 2] = '\x0';
 106         *model = g_strndup((const gchar *)buf + 2, 30);
 107
 108         return SR_OK;
 109 }
 110
 111 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 112 {
 113         struct drv_context *drvc;
 114         struct dev_context *devc;
 115         struct sr_dev_inst *sdi;
 116         GSList *usb_devices, *devices, *l;
 117         char *model;
 118
 119         (void)options;
 120
 121         drvc = di->context;
 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(di, l->data, &model) != SR_OK)
 130                                 continue;
 131                         sdi = g_malloc0(sizeof(struct sr_dev_inst));
 132                         sdi->status = SR_ST_INACTIVE;
 133                         sdi->vendor = g_strdup(VENDOR);
 134                         sdi->model = model; /* Already g_strndup()'d. */
 135                         sdi->driver = di;
 136                         sdi->inst_type = SR_INST_USB;
 137                         sdi->conn = l->data;
 138                         sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "SPL");
 139                         devc = g_malloc0(sizeof(struct dev_context));
 140                         sdi->priv = devc;
 141                         devc->limit_samples = 0;
 142                         /* The protocol provides no way to read the current
 143                          * settings, so we'll enforce these. */
 144                         devc->sample_interval = DEFAULT_SAMPLE_INTERVAL;
 145                         devc->alarm_low = DEFAULT_ALARM_LOW;
 146                         devc->alarm_high = DEFAULT_ALARM_HIGH;
 147                         devc->mqflags = DEFAULT_WEIGHT_TIME | DEFAULT_WEIGHT_FREQ;
 148                         devc->data_source = DEFAULT_DATA_SOURCE;
 149                         devc->config_dirty = FALSE;
 150
 151                         /* TODO: Set date/time? */
 152
 153                         drvc->instances = g_slist_append(drvc->instances, sdi);
 154                         devices = g_slist_append(devices, sdi);
 155                 }
 156                 g_slist_free(usb_devices);
 157         } else
 158                 g_slist_free_full(usb_devices, g_free);
 159
 160         return devices;
 161 }
 162
 163 static GSList *dev_list(const struct sr_dev_driver *di)
 164 {
 165         return ((struct drv_context *)(di->context))->instances;
 166 }
 167
 168 static int dev_open(struct sr_dev_inst *sdi)
 169 {
 170         struct sr_dev_driver *di = sdi->driver;
 171         struct drv_context *drvc;
 172         struct sr_usb_dev_inst *usb;
 173         int ret;
 174
 175         if (!(drvc = di->context)) {
 176                 sr_err("Driver was not initialized.");
 177                 return SR_ERR;
 178         }
 179
 180         usb = sdi->conn;
 181
 182         if (sr_usb_open(drvc->sr_ctx->libusb_ctx, usb) != SR_OK)
 183                 return SR_ERR;
 184
 185         if ((ret = libusb_set_configuration(usb->devhdl, 1))) {
 186                 sr_err("Failed to set configuration: %s.", libusb_error_name(ret));
 187                 return SR_ERR;
 188         }
 189
 190         if ((ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE))) {
 191                 sr_err("Failed to claim interface: %s.", libusb_error_name(ret));
 192                 return SR_ERR;
 193         }
 194         sdi->status = SR_ST_ACTIVE;
 195
 196         return ret;
 197 }
 198
 199 static int dev_close(struct sr_dev_inst *sdi)
 200 {
 201         struct sr_dev_driver *di = sdi->driver;
 202         struct dev_context *devc;
 203         struct sr_usb_dev_inst *usb;
 204
 205         if (!di->context) {
 206                 sr_err("Driver was not initialized.");
 207                 return SR_ERR;
 208         }
 209
 210         usb = sdi->conn;
 211
 212         if (!usb->devhdl)
 213                 /*  Nothing to do. */
 214                 return SR_OK;
 215
 216         /* This allows a frontend to configure the device without ever
 217          * doing an acquisition step. */
 218         devc = sdi->priv;
 219         if (!devc->config_dirty)
 220                 kecheng_kc_330b_configure(sdi);
 221
 222         libusb_release_interface(usb->devhdl, USB_INTERFACE);
 223         libusb_close(usb->devhdl);
 224         usb->devhdl = NULL;
 225         sdi->status = SR_ST_INACTIVE;
 226
 227         return SR_OK;
 228 }
 229
 230 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 231                 const struct sr_channel_group *cg)
 232 {
 233         struct dev_context *devc;
 234         GVariant *rational[2];
 235         const uint64_t *si;
 236
 237         (void)cg;
 238
 239         devc = sdi->priv;
 240         switch (key) {
 241         case SR_CONF_LIMIT_SAMPLES:
 242                 *data = g_variant_new_uint64(devc->limit_samples);
 243                 break;
 244         case SR_CONF_SAMPLE_INTERVAL:
 245                 si = kecheng_kc_330b_sample_intervals[devc->sample_interval];
 246                 rational[0] = g_variant_new_uint64(si[0]);
 247                 rational[1] = g_variant_new_uint64(si[1]);
 248                 *data = g_variant_new_tuple(rational, 2);
 249                 break;
 250         case SR_CONF_DATALOG:
 251                 /* There really isn't a way to be sure the device is logging. */
 252                 return SR_ERR_NA;
 253                 break;
 254         case SR_CONF_SPL_WEIGHT_FREQ:
 255                 if (devc->mqflags & SR_MQFLAG_SPL_FREQ_WEIGHT_A)
 256                         *data = g_variant_new_string("A");
 257                 else
 258                         *data = g_variant_new_string("C");
 259                 break;
 260         case SR_CONF_SPL_WEIGHT_TIME:
 261                 if (devc->mqflags & SR_MQFLAG_SPL_TIME_WEIGHT_F)
 262                         *data = g_variant_new_string("F");
 263                 else
 264                         *data = g_variant_new_string("S");
 265                 break;
 266         case SR_CONF_DATA_SOURCE:
 267                 if (devc->data_source == DATA_SOURCE_LIVE)
 268                         *data = g_variant_new_string("Live");
 269                 else
 270                         *data = g_variant_new_string("Memory");
 271                 break;
 272         default:
 273                 return SR_ERR_NA;
 274         }
 275
 276         return SR_OK;
 277 }
 278
 279 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 280                 const struct sr_channel_group *cg)
 281 {
 282         struct sr_dev_driver *di = sdi->driver;
 283         struct dev_context *devc;
 284         uint64_t p, q;
 285         unsigned int i;
 286         int tmp, ret;
 287         const char *tmp_str;
 288
 289         (void)cg;
 290
 291         if (sdi->status != SR_ST_ACTIVE)
 292                 return SR_ERR_DEV_CLOSED;
 293
 294         if (!di->context) {
 295                 sr_err("Driver was not initialized.");
 296                 return SR_ERR;
 297         }
 298
 299         devc = sdi->priv;
 300         ret = SR_OK;
 301         switch (key) {
 302         case SR_CONF_LIMIT_SAMPLES:
 303                 devc->limit_samples = g_variant_get_uint64(data);
 304                 sr_dbg("Setting sample limit to %" PRIu64 ".",
 305                        devc->limit_samples);
 306                 break;
 307         case SR_CONF_SAMPLE_INTERVAL:
 308                 g_variant_get(data, "(tt)", &p, &q);
 309                 for (i = 0; i < ARRAY_SIZE(kecheng_kc_330b_sample_intervals); i++) {
 310                         if (kecheng_kc_330b_sample_intervals[i][0] != p || kecheng_kc_330b_sample_intervals[i][1] != q)
 311                                 continue;
 312                         devc->sample_interval = i;
 313                         devc->config_dirty = TRUE;
 314                         break;
 315                 }
 316                 if (i == ARRAY_SIZE(kecheng_kc_330b_sample_intervals))
 317                         ret = SR_ERR_ARG;
 318                 break;
 319         case SR_CONF_SPL_WEIGHT_FREQ:
 320                 tmp_str = g_variant_get_string(data, NULL);
 321                 if (!strcmp(tmp_str, "A"))
 322                         tmp = SR_MQFLAG_SPL_FREQ_WEIGHT_A;
 323                 else if (!strcmp(tmp_str, "C"))
 324                         tmp = SR_MQFLAG_SPL_FREQ_WEIGHT_C;
 325                 else
 326                         return SR_ERR_ARG;
 327                 devc->mqflags &= ~(SR_MQFLAG_SPL_FREQ_WEIGHT_A | SR_MQFLAG_SPL_FREQ_WEIGHT_C);
 328                 devc->mqflags |= tmp;
 329                 devc->config_dirty = TRUE;
 330                 break;
 331         case SR_CONF_SPL_WEIGHT_TIME:
 332                 tmp_str = g_variant_get_string(data, NULL);
 333                 if (!strcmp(tmp_str, "F"))
 334                         tmp = SR_MQFLAG_SPL_TIME_WEIGHT_F;
 335                 else if (!strcmp(tmp_str, "S"))
 336                         tmp = SR_MQFLAG_SPL_TIME_WEIGHT_S;
 337                 else
 338                         return SR_ERR_ARG;
 339                 devc->mqflags &= ~(SR_MQFLAG_SPL_TIME_WEIGHT_F | SR_MQFLAG_SPL_TIME_WEIGHT_S);
 340                 devc->mqflags |= tmp;
 341                 devc->config_dirty = TRUE;
 342                 break;
 343         case SR_CONF_DATA_SOURCE:
 344                 tmp_str = g_variant_get_string(data, NULL);
 345                 if (!strcmp(tmp_str, "Live"))
 346                         devc->data_source = DATA_SOURCE_LIVE;
 347                 else if (!strcmp(tmp_str, "Memory"))
 348                         devc->data_source = DATA_SOURCE_MEMORY;
 349                 else
 350                         return SR_ERR;
 351                 devc->config_dirty = TRUE;
 352                 break;
 353         default:
 354                 ret = SR_ERR_NA;
 355         }
 356
 357         return ret;
 358 }
 359
 360 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 361                 const struct sr_channel_group *cg)
 362 {
 363         GVariant *tuple, *rational[2];
 364         GVariantBuilder gvb;
 365         unsigned int i;
 366
 367         (void)sdi;
 368         (void)cg;
 369
 370         switch (key) {
 371         case SR_CONF_DEVICE_OPTIONS:
 372                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 373                                 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 374                 break;
 375         case SR_CONF_SAMPLE_INTERVAL:
 376                 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 377                 for (i = 0; i < ARRAY_SIZE(kecheng_kc_330b_sample_intervals); i++) {
 378                         rational[0] = g_variant_new_uint64(kecheng_kc_330b_sample_intervals[i][0]);
 379                         rational[1] = g_variant_new_uint64(kecheng_kc_330b_sample_intervals[i][1]);
 380                         tuple = g_variant_new_tuple(rational, 2);
 381                         g_variant_builder_add_value(&gvb, tuple);
 382                 }
 383                 *data = g_variant_builder_end(&gvb);
 384                 break;
 385         case SR_CONF_SPL_WEIGHT_FREQ:
 386                 *data = g_variant_new_strv(weight_freq, ARRAY_SIZE(weight_freq));
 387                 break;
 388         case SR_CONF_SPL_WEIGHT_TIME:
 389                 *data = g_variant_new_strv(weight_time, ARRAY_SIZE(weight_time));
 390                 break;
 391         case SR_CONF_DATA_SOURCE:
 392                 *data = g_variant_new_strv(data_sources, ARRAY_SIZE(data_sources));
 393                 break;
 394         default:
 395                 return SR_ERR_NA;
 396         }
 397
 398         return SR_OK;
 399 }
 400
 401 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 402 {
 403         struct sr_dev_driver *di = sdi->driver;
 404         struct drv_context *drvc;
 405         struct dev_context *devc;
 406         struct sr_datafeed_packet packet;
 407         struct sr_datafeed_meta meta;
 408         struct sr_config *src;
 409         struct sr_usb_dev_inst *usb;
 410         GVariant *gvar, *rational[2];
 411         const uint64_t *si;
 412         int req_len, buf_len, len, ret;
 413         unsigned char buf[9];
 414
 415         if (sdi->status != SR_ST_ACTIVE)
 416                 return SR_ERR_DEV_CLOSED;
 417
 418         drvc = di->context;
 419         devc = sdi->priv;
 420         usb = sdi->conn;
 421
 422         devc->num_samples = 0;
 423
 424         std_session_send_df_header(sdi, LOG_PREFIX);
 425
 426         if (devc->data_source == DATA_SOURCE_LIVE) {
 427                 /* Force configuration. */
 428                 kecheng_kc_330b_configure(sdi);
 429
 430                 if (kecheng_kc_330b_status_get(sdi, &ret) != SR_OK)
 431                         return SR_ERR;
 432                 if (ret != DEVICE_ACTIVE) {
 433                         sr_err("Device is inactive");
 434                         /* Still continue though, since the device will
 435                          * just return 30.0 until the user hits the button
 436                          * on the device -- and then start feeding good
 437                          * samples back. */
 438                 }
 439         } else {
 440                 if (kecheng_kc_330b_log_info_get(sdi, buf) != SR_OK)
 441                         return SR_ERR;
 442                 devc->mqflags = buf[4] ? SR_MQFLAG_SPL_TIME_WEIGHT_S : SR_MQFLAG_SPL_TIME_WEIGHT_F;
 443                 devc->mqflags |= buf[5] ? SR_MQFLAG_SPL_FREQ_WEIGHT_C : SR_MQFLAG_SPL_FREQ_WEIGHT_A;
 444                 devc->stored_samples = (buf[7] << 8) | buf[8];
 445                 if (devc->stored_samples == 0) {
 446                         /* Notify frontend of empty log by sending start/end packets. */
 447                         std_session_send_df_end(sdi, LOG_PREFIX);
 448                         return SR_OK;
 449                 }
 450
 451                 if (devc->limit_samples && devc->limit_samples < devc->stored_samples)
 452                         devc->stored_samples = devc->limit_samples;
 453
 454                 si = kecheng_kc_330b_sample_intervals[buf[1]];
 455                 rational[0] = g_variant_new_uint64(si[0]);
 456                 rational[1] = g_variant_new_uint64(si[1]);
 457                 gvar = g_variant_new_tuple(rational, 2);
 458                 src = sr_config_new(SR_CONF_SAMPLE_INTERVAL, gvar);
 459                 packet.type = SR_DF_META;
 460                 packet.payload = &meta;
 461                 meta.config = g_slist_append(NULL, src);
 462                 sr_session_send(sdi, &packet);
 463                 g_free(src);
 464         }
 465
 466         if (!(devc->xfer = libusb_alloc_transfer(0)))
 467                 return SR_ERR;
 468
 469         usb_source_add(sdi->session, drvc->sr_ctx, 10,
 470                 kecheng_kc_330b_handle_events, (void *)sdi);
 471
 472         if (devc->data_source == DATA_SOURCE_LIVE) {
 473                 buf[0] = CMD_GET_LIVE_SPL;
 474                 buf_len = 1;
 475                 devc->state = LIVE_SPL_WAIT;
 476                 devc->last_live_request = g_get_monotonic_time() / 1000;
 477                 req_len = 3;
 478         } else {
 479                 buf[0] = CMD_GET_LOG_DATA;
 480                 buf[1] = 0;
 481                 buf[2] = 0;
 482                 buf_len = 4;
 483                 devc->state = LOG_DATA_WAIT;
 484                 if (devc->stored_samples < 63)
 485                         buf[3] = devc->stored_samples;
 486                 else
 487                         buf[3] = 63;
 488                 /* Command ack byte + 2 bytes per sample. */
 489                 req_len = 1 + buf[3] * 2;
 490         }
 491
 492         ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, buf, buf_len, &len, 5);
 493         if (ret != 0 || len != 1) {
 494                 sr_dbg("Failed to start acquisition: %s", libusb_error_name(ret));
 495                 libusb_free_transfer(devc->xfer);
 496                 return SR_ERR;
 497         }
 498
 499         libusb_fill_bulk_transfer(devc->xfer, usb->devhdl, EP_IN, devc->buf,
 500                         req_len, kecheng_kc_330b_receive_transfer, (void *)sdi, 15);
 501         if (libusb_submit_transfer(devc->xfer) != 0) {
 502                 libusb_free_transfer(devc->xfer);
 503                 return SR_ERR;
 504         }
 505
 506         return SR_OK;
 507 }
 508
 509 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 510 {
 511         struct dev_context *devc;
 512
 513         if (sdi->status != SR_ST_ACTIVE)
 514                 return SR_ERR_DEV_CLOSED;
 515
 516         /* Signal USB transfer handler to clean up and stop. */
 517         sdi->status = SR_ST_STOPPING;
 518
 519         devc = sdi->priv;
 520         if (devc->data_source == DATA_SOURCE_MEMORY && devc->config_dirty) {
 521                 /* The protocol doesn't have a command to clear stored data;
 522                  * it clears it whenever new configuration is set. That means
 523                  * we can't just configure the device any time we want when
 524                  * it's in DATA_SOURCE_MEMORY mode. The only safe time to do
 525                  * it is now, when we're sure we've pulled in all the stored
 526                  * data. */
 527                 kecheng_kc_330b_configure(sdi);
 528         }
 529
 530         return SR_OK;
 531 }
 532
 533 SR_PRIV struct sr_dev_driver kecheng_kc_330b_driver_info = {
 534         .name = "kecheng-kc-330b",
 535         .longname = "Kecheng KC-330B",
 536         .api_version = 1,
 537         .init = init,
 538         .cleanup = std_cleanup,
 539         .scan = scan,
 540         .dev_list = dev_list,
 541         .dev_clear = NULL,
 542         .config_get = config_get,
 543         .config_set = config_set,
 544         .config_list = config_list,
 545         .dev_open = dev_open,
 546         .dev_close = dev_close,
 547         .dev_acquisition_start = dev_acquisition_start,
 548         .dev_acquisition_stop = dev_acquisition_stop,
 549         .context = NULL,
 550 };