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 scanopts[] = {
  24         SR_CONF_CONN,
  25 };
  26
  27 static const uint32_t drvopts[] = {
  28         SR_CONF_LOGIC_ANALYZER,
  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(struct dev_context *devc)
  47 {
  48         ftdi_free(devc->ftdic);
  49         g_free(devc->final_buf);
  50 }
  51
  52 static int dev_clear(const struct sr_dev_driver *di)
  53 {
  54         return std_dev_clear_with_callback(di, (std_dev_clear_callback)clear_helper);
  55 }
  56
  57 static int add_device(int model, struct libusb_device_descriptor *des,
  58         const char *serial_num, const char *connection_id, libusb_device *usbdev,
  59         GSList **devices)
  60 {
  61         int ret;
  62         unsigned int i;
  63         struct sr_dev_inst *sdi;
  64         struct dev_context *devc;
  65
  66         ret = SR_OK;
  67
  68         devc = g_malloc0(sizeof(struct dev_context));
  69
  70         /* Set some sane defaults. */
  71         devc->prof = &cv_profiles[model];
  72         devc->ftdic = NULL; /* Will be set in the open() API call. */
  73         devc->cur_samplerate = 0; /* Set later (different for LA8/LA16). */
  74         devc->limit_msec = 0;
  75         devc->limit_samples = 0;
  76         memset(devc->mangled_buf, 0, BS);
  77         devc->final_buf = NULL;
  78         devc->trigger_pattern = 0x0000; /* Irrelevant, see trigger_mask. */
  79         devc->trigger_mask = 0x0000; /* All channels: "don't care". */
  80         devc->trigger_edgemask = 0x0000; /* All channels: "state triggered". */
  81         devc->trigger_found = 0;
  82         devc->done = 0;
  83         devc->block_counter = 0;
  84         devc->divcount = 0;
  85         devc->usb_vid = des->idVendor;
  86         devc->usb_pid = des->idProduct;
  87         memset(devc->samplerates, 0, sizeof(uint64_t) * 255);
  88
  89         /* Allocate memory where we'll store the de-mangled data. */
  90         if (!(devc->final_buf = g_try_malloc(SDRAM_SIZE))) {
  91                 sr_err("Failed to allocate memory for sample buffer.");
  92                 ret = SR_ERR_MALLOC;
  93                 goto err_free_devc;
  94         }
  95
  96         /* We now know the device, set its max. samplerate as default. */
  97         devc->cur_samplerate = devc->prof->max_samplerate;
  98
  99         sdi = g_malloc0(sizeof(struct sr_dev_inst));
 100         sdi->status = SR_ST_INACTIVE;
 101         sdi->vendor = g_strdup("ChronoVu");
 102         sdi->model = g_strdup(devc->prof->modelname);
 103         sdi->serial_num = g_strdup(serial_num);
 104         sdi->connection_id = g_strdup(connection_id);
 105         sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(usbdev),
 106                 libusb_get_device_address(usbdev), NULL);
 107         sdi->priv = devc;
 108
 109         for (i = 0; i < devc->prof->num_channels; i++)
 110                 sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE,
 111                                 cv_channel_names[i]);
 112
 113         *devices = g_slist_append(*devices, sdi);
 114
 115         if (ret == SR_OK)
 116                 return SR_OK;
 117
 118 err_free_devc:
 119         g_free(devc);
 120
 121         return ret;
 122 }
 123
 124 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 125 {
 126         int i, ret, model;
 127         struct drv_context *drvc;
 128         GSList *devices, *conn_devices, *l;
 129         struct sr_usb_dev_inst *usb;
 130         struct sr_config *src;
 131         struct libusb_device_descriptor des;
 132         libusb_device **devlist;
 133         struct libusb_device_handle *hdl;
 134         const char *conn;
 135         char product[64], serial_num[64], connection_id[64];
 136
 137         drvc = di->context;
 138
 139         conn = NULL;
 140         for (l = options; l; l = l->next) {
 141                 src = l->data;
 142                 switch (src->key) {
 143                 case SR_CONF_CONN:
 144                         conn = g_variant_get_string(src->data, NULL);
 145                         break;
 146                 }
 147         }
 148         if (conn)
 149                 conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
 150         else
 151                 conn_devices = NULL;
 152
 153         devices = NULL;
 154         libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
 155
 156         for (i = 0; devlist[i]; i++) {
 157                 if (conn) {
 158                         for (l = conn_devices; l; l = l->next) {
 159                                 usb = l->data;
 160                                 if (usb->bus == libusb_get_bus_number(devlist[i])
 161                                         && usb->address == libusb_get_device_address(devlist[i]))
 162                                         break;
 163                         }
 164                         if (!l)
 165                                 /* This device matched none of the ones that
 166                                  * matched the conn specification. */
 167                                 continue;
 168                 }
 169
 170                 libusb_get_device_descriptor(devlist[i], &des);
 171
 172                 if ((ret = libusb_open(devlist[i], &hdl)) < 0)
 173                         continue;
 174
 175                 if (des.iProduct == 0) {
 176                         product[0] = '\0';
 177                 } else if ((ret = libusb_get_string_descriptor_ascii(hdl,
 178                                 des.iProduct, (unsigned char *)product,
 179                                 sizeof(product))) < 0) {
 180                         sr_warn("Failed to get product string descriptor: %s.",
 181                                 libusb_error_name(ret));
 182                         continue;
 183                 }
 184
 185                 if (des.iSerialNumber == 0) {
 186                         serial_num[0] = '\0';
 187                 } else if ((ret = libusb_get_string_descriptor_ascii(hdl,
 188                                 des.iSerialNumber, (unsigned char *)serial_num,
 189                                 sizeof(serial_num))) < 0) {
 190                         sr_warn("Failed to get serial number string descriptor: %s.",
 191                                 libusb_error_name(ret));
 192                         continue;
 193                 }
 194
 195                 libusb_close(hdl);
 196
 197                 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
 198
 199                 if (!strcmp(product, "ChronoVu LA8"))
 200                         model = 0;
 201                 else if (!strcmp(product, "ChronoVu LA16"))
 202                         model = 1;
 203                 else
 204                         continue; /* Unknown iProduct string, ignore. */
 205
 206                 sr_dbg("Found %s (%04x:%04x, %d.%d, %s).",
 207                        product, des.idVendor, des.idProduct,
 208                        libusb_get_bus_number(devlist[i]),
 209                        libusb_get_device_address(devlist[i]), connection_id);
 210
 211                 if ((ret = add_device(model, &des, serial_num, connection_id,
 212                                         devlist[i], &devices)) < 0) {
 213                         sr_dbg("Failed to add device: %d.", ret);
 214                 }
 215         }
 216
 217         libusb_free_device_list(devlist, 1);
 218         g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);
 219
 220         return std_scan_complete(di, devices);
 221 }
 222
 223 static int dev_open(struct sr_dev_inst *sdi)
 224 {
 225         struct dev_context *devc;
 226         int ret;
 227
 228         devc = sdi->priv;
 229
 230         if (!(devc->ftdic = ftdi_new())) {
 231                 sr_err("Failed to initialize libftdi.");
 232                 return SR_ERR;
 233         }
 234
 235         sr_dbg("Opening %s device (%04x:%04x).", devc->prof->modelname,
 236                devc->usb_vid, devc->usb_pid);
 237
 238         if ((ret = ftdi_usb_open_desc(devc->ftdic, devc->usb_vid,
 239                         devc->usb_pid, devc->prof->iproduct, NULL)) < 0) {
 240                 sr_err("Failed to open FTDI device (%d): %s.",
 241                        ret, ftdi_get_error_string(devc->ftdic));
 242                 goto err_ftdi_free;
 243         }
 244
 245         if ((ret = ftdi_usb_purge_buffers(devc->ftdic)) < 0) {
 246                 sr_err("Failed to purge FTDI buffers (%d): %s.",
 247                        ret, ftdi_get_error_string(devc->ftdic));
 248                 goto err_ftdi_free;
 249         }
 250
 251         if ((ret = ftdi_setflowctrl(devc->ftdic, SIO_RTS_CTS_HS)) < 0) {
 252                 sr_err("Failed to enable FTDI flow control (%d): %s.",
 253                        ret, ftdi_get_error_string(devc->ftdic));
 254                 goto err_ftdi_free;
 255         }
 256
 257         g_usleep(100 * 1000);
 258
 259         return SR_OK;
 260
 261 err_ftdi_free:
 262         ftdi_free(devc->ftdic); /* Close device (if open), free FTDI context. */
 263         devc->ftdic = NULL;
 264         return SR_ERR;
 265 }
 266
 267 static int dev_close(struct sr_dev_inst *sdi)
 268 {
 269         int ret;
 270         struct dev_context *devc;
 271
 272         devc = sdi->priv;
 273
 274         if (!devc->ftdic)
 275                 return SR_ERR_BUG;
 276
 277         if ((ret = ftdi_usb_close(devc->ftdic)) < 0)
 278                 sr_err("Failed to close FTDI device (%d): %s.",
 279                        ret, ftdi_get_error_string(devc->ftdic));
 280
 281         return (ret == 0) ? SR_OK : SR_ERR;
 282 }
 283
 284 static int config_get(uint32_t key, GVariant **data,
 285         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 286 {
 287         struct dev_context *devc;
 288         struct sr_usb_dev_inst *usb;
 289
 290         (void)cg;
 291
 292         switch (key) {
 293         case SR_CONF_CONN:
 294                 if (!sdi || !(usb = sdi->conn))
 295                         return SR_ERR_ARG;
 296                 *data = g_variant_new_printf("%d.%d", usb->bus, usb->address);
 297                 break;
 298         case SR_CONF_SAMPLERATE:
 299                 if (!sdi)
 300                         return SR_ERR_BUG;
 301                 devc = sdi->priv;
 302                 *data = g_variant_new_uint64(devc->cur_samplerate);
 303                 break;
 304         default:
 305                 return SR_ERR_NA;
 306         }
 307
 308         return SR_OK;
 309 }
 310
 311 static int config_set(uint32_t key, GVariant *data,
 312         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 313 {
 314         struct dev_context *devc;
 315
 316         (void)cg;
 317
 318         devc = sdi->priv;
 319
 320         switch (key) {
 321         case SR_CONF_SAMPLERATE:
 322                 if (cv_set_samplerate(sdi, g_variant_get_uint64(data)) < 0)
 323                         return SR_ERR;
 324                 break;
 325         case SR_CONF_LIMIT_MSEC:
 326                 devc->limit_msec = g_variant_get_uint64(data);
 327                 break;
 328         case SR_CONF_LIMIT_SAMPLES:
 329                 devc->limit_samples = g_variant_get_uint64(data);
 330                 break;
 331         default:
 332                 return SR_ERR_NA;
 333         }
 334
 335         return SR_OK;
 336 }
 337
 338 static int config_list(uint32_t key, GVariant **data,
 339         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 340 {
 341         struct dev_context *devc;
 342
 343         devc = (sdi) ? sdi->priv : NULL;
 344
 345         switch (key) {
 346         case SR_CONF_SCAN_OPTIONS:
 347         case SR_CONF_DEVICE_OPTIONS:
 348                 return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
 349         case SR_CONF_SAMPLERATE:
 350                 cv_fill_samplerates_if_needed(sdi);
 351                 *data = std_gvar_samplerates(ARRAY_AND_SIZE(devc->samplerates));
 352                 break;
 353         case SR_CONF_LIMIT_SAMPLES:
 354                 if (!devc || !devc->prof)
 355                         return SR_ERR_BUG;
 356                 *data = std_gvar_tuple_u64(0, (devc->prof->model == CHRONOVU_LA8) ? MAX_NUM_SAMPLES : MAX_NUM_SAMPLES / 2);
 357                 break;
 358         case SR_CONF_TRIGGER_MATCH:
 359                 if (!devc || !devc->prof)
 360                         return SR_ERR_BUG;
 361                 *data = std_gvar_array_i32(trigger_matches, devc->prof->num_trigger_matches);
 362                 break;
 363         default:
 364                 return SR_ERR_NA;
 365         }
 366
 367         return SR_OK;
 368 }
 369
 370 static int receive_data(int fd, int revents, void *cb_data)
 371 {
 372         int i, ret;
 373         struct sr_dev_inst *sdi;
 374         struct dev_context *devc;
 375
 376         (void)fd;
 377         (void)revents;
 378
 379         if (!(sdi = cb_data)) {
 380                 sr_err("cb_data was NULL.");
 381                 return FALSE;
 382         }
 383
 384         if (!(devc = sdi->priv)) {
 385                 sr_err("sdi->priv was NULL.");
 386                 return FALSE;
 387         }
 388
 389         if (!devc->ftdic) {
 390                 sr_err("devc->ftdic was NULL.");
 391                 return FALSE;
 392         }
 393
 394         /* Get one block of data. */
 395         if ((ret = cv_read_block(devc)) < 0) {
 396                 sr_err("Failed to read data block: %d.", ret);
 397                 sr_dev_acquisition_stop(sdi);
 398                 return FALSE;
 399         }
 400
 401         /* We need to get exactly NUM_BLOCKS blocks (i.e. 8MB) of data. */
 402         if (devc->block_counter != (NUM_BLOCKS - 1)) {
 403                 devc->block_counter++;
 404                 return TRUE;
 405         }
 406
 407         sr_dbg("Sampling finished, sending data to session bus now.");
 408
 409         /*
 410          * All data was received and demangled, send it to the session bus.
 411          *
 412          * Note: Due to the method how data is spread across the 8MByte of
 413          * SDRAM, we can _not_ send it to the session bus in a streaming
 414          * manner while we receive it. We have to receive and de-mangle the
 415          * full 8MByte first, only then the whole buffer contains valid data.
 416          */
 417         for (i = 0; i < NUM_BLOCKS; i++)
 418                 cv_send_block_to_session_bus(sdi, i);
 419
 420         sr_dev_acquisition_stop(sdi);
 421
 422         return TRUE;
 423 }
 424
 425 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 426 {
 427         struct dev_context *devc;
 428         uint8_t buf[8];
 429         int bytes_to_write, bytes_written;
 430
 431         devc = sdi->priv;
 432
 433         if (!devc->ftdic) {
 434                 sr_err("devc->ftdic was NULL.");
 435                 return SR_ERR_BUG;
 436         }
 437
 438         devc->divcount = cv_samplerate_to_divcount(sdi, devc->cur_samplerate);
 439         if (devc->divcount == 0xff) {
 440                 sr_err("Invalid divcount/samplerate.");
 441                 return SR_ERR;
 442         }
 443
 444         if (cv_convert_trigger(sdi) != SR_OK) {
 445                 sr_err("Failed to configure trigger.");
 446                 return SR_ERR;
 447         }
 448
 449         /* Fill acquisition parameters into buf[]. */
 450         if (devc->prof->model == CHRONOVU_LA8) {
 451                 buf[0] = devc->divcount;
 452                 buf[1] = 0xff; /* This byte must always be 0xff. */
 453                 buf[2] = devc->trigger_pattern & 0xff;
 454                 buf[3] = devc->trigger_mask & 0xff;
 455                 bytes_to_write = 4;
 456         } else {
 457                 buf[0] = devc->divcount;
 458                 buf[1] = 0xff; /* This byte must always be 0xff. */
 459                 buf[2] = (devc->trigger_pattern & 0xff00) >> 8;  /* LSB */
 460                 buf[3] = (devc->trigger_pattern & 0x00ff) >> 0;  /* MSB */
 461                 buf[4] = (devc->trigger_mask & 0xff00) >> 8;     /* LSB */
 462                 buf[5] = (devc->trigger_mask & 0x00ff) >> 0;     /* MSB */
 463                 buf[6] = (devc->trigger_edgemask & 0xff00) >> 8; /* LSB */
 464                 buf[7] = (devc->trigger_edgemask & 0x00ff) >> 0; /* MSB */
 465                 bytes_to_write = 8;
 466         }
 467
 468         /* Start acquisition. */
 469         bytes_written = cv_write(devc, buf, bytes_to_write);
 470
 471         if (bytes_written < 0 || bytes_written != bytes_to_write) {
 472                 sr_err("Acquisition failed to start.");
 473                 return SR_ERR;
 474         }
 475
 476         std_session_send_df_header(sdi);
 477
 478         /* Time when we should be done (for detecting trigger timeouts). */
 479         devc->done = (devc->divcount + 1) * devc->prof->trigger_constant +
 480                         g_get_monotonic_time() + (10 * G_TIME_SPAN_SECOND);
 481         devc->block_counter = 0;
 482         devc->trigger_found = 0;
 483
 484         /* Hook up a dummy handler to receive data from the device. */
 485         sr_session_source_add(sdi->session, -1, 0, 0, receive_data, (void *)sdi);
 486
 487         return SR_OK;
 488 }
 489
 490 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 491 {
 492         sr_session_source_remove(sdi->session, -1);
 493         std_session_send_df_end(sdi);
 494
 495         return SR_OK;
 496 }
 497
 498 static struct sr_dev_driver chronovu_la_driver_info = {
 499         .name = "chronovu-la",
 500         .longname = "ChronoVu LA8/LA16",
 501         .api_version = 1,
 502         .init = std_init,
 503         .cleanup = std_cleanup,
 504         .scan = scan,
 505         .dev_list = std_dev_list,
 506         .dev_clear = dev_clear,
 507         .config_get = config_get,
 508         .config_set = config_set,
 509         .config_list = config_list,
 510         .dev_open = dev_open,
 511         .dev_close = dev_close,
 512         .dev_acquisition_start = dev_acquisition_start,
 513         .dev_acquisition_stop = dev_acquisition_stop,
 514         .context = NULL,
 515 };
 516 SR_REGISTER_DEV_DRIVER(chronovu_la_driver_info);