src/hardware/ikalogic-scanalogic2/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2013 Marc Schink <sigrok-dev@marcschink.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 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 "protocol.h"
  21
  22 static const uint32_t devopts[] = {
  23         SR_CONF_LOGIC_ANALYZER,
  24         SR_CONF_LIMIT_SAMPLES | SR_CONF_SET | SR_CONF_LIST,
  25         SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  26         SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
  27         SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET,
  28 };
  29
  30 static const int32_t trigger_matches[] = {
  31         SR_TRIGGER_RISING,
  32         SR_TRIGGER_FALLING,
  33         SR_TRIGGER_EDGE,
  34 };
  35
  36 SR_PRIV const uint64_t sl2_samplerates[NUM_SAMPLERATES] = {
  37         SR_KHZ(1.25),
  38         SR_KHZ(10),
  39         SR_KHZ(50),
  40         SR_KHZ(100),
  41         SR_KHZ(250),
  42         SR_KHZ(500),
  43         SR_MHZ(1),
  44         SR_MHZ(2.5),
  45         SR_MHZ(5),
  46         SR_MHZ(10),
  47         SR_MHZ(20),
  48 };
  49
  50 static const char *channel_names[] = {
  51         "0", "1", "2", "3",
  52 };
  53
  54 SR_PRIV struct sr_dev_driver ikalogic_scanalogic2_driver_info;
  55
  56 static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx)
  57 {
  58         return std_init(sr_ctx, di, LOG_PREFIX);
  59 }
  60
  61 static GSList *scan(struct sr_dev_driver *di, GSList *options)
  62 {
  63         GSList *usb_devices, *devices, *l;
  64         struct drv_context *drvc;
  65         struct sr_dev_inst *sdi;
  66         struct dev_context *devc;
  67         struct sr_usb_dev_inst *usb;
  68         struct device_info dev_info;
  69         unsigned int i;
  70         int ret;
  71
  72         (void)options;
  73
  74         devices = NULL;
  75         drvc = di->context;
  76         drvc->instances = NULL;
  77
  78         usb_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, USB_VID_PID);
  79
  80         if (!usb_devices)
  81                 return NULL;
  82
  83         for (l = usb_devices; l; l = l->next) {
  84                 usb = l->data;
  85
  86                 if ((ret = sl2_get_device_info(*usb, &dev_info)) < 0) {
  87                         sr_warn("Failed to get device information: %d.", ret);
  88                         sr_usb_dev_inst_free(usb);
  89                         continue;
  90                 }
  91
  92                 devc = g_malloc0(sizeof(struct dev_context));
  93
  94                 if (!(devc->xfer_in = libusb_alloc_transfer(0))) {
  95                         sr_err("Transfer malloc failed.");
  96                         sr_usb_dev_inst_free(usb);
  97                         g_free(devc);
  98                         continue;
  99                 }
 100
 101                 if (!(devc->xfer_out = libusb_alloc_transfer(0))) {
 102                         sr_err("Transfer malloc failed.");
 103                         sr_usb_dev_inst_free(usb);
 104                         libusb_free_transfer(devc->xfer_in);
 105                         g_free(devc);
 106                         continue;
 107                 }
 108
 109                 sdi = g_malloc0(sizeof(struct sr_dev_inst));
 110                 sdi->status = SR_ST_INACTIVE;
 111                 sdi->vendor = g_strdup(VENDOR_NAME);
 112                 sdi->model = g_strdup(MODEL_NAME);
 113                 sdi->version = g_strdup_printf("%u.%u", dev_info.fw_ver_major, dev_info.fw_ver_minor);
 114                 sdi->serial_num = g_strdup_printf("%d", dev_info.serial);
 115                 sdi->priv = devc;
 116                 sdi->driver = di;
 117                 sdi->inst_type = SR_INST_USB;
 118                 sdi->conn = usb;
 119
 120                 for (i = 0; i < ARRAY_SIZE(channel_names); i++)
 121                         devc->channels[i] = sr_channel_new(sdi, i,
 122                                 SR_CHANNEL_LOGIC, TRUE, channel_names[i]);
 123
 124                 devc->state = STATE_IDLE;
 125                 devc->next_state = STATE_IDLE;
 126
 127                 /* Set default samplerate. */
 128                 sl2_set_samplerate(sdi, DEFAULT_SAMPLERATE);
 129
 130                 /* Set default capture ratio. */
 131                 devc->capture_ratio = 0;
 132
 133                 /* Set default after trigger delay. */
 134                 devc->after_trigger_delay = 0;
 135
 136                 memset(devc->xfer_buf_in, 0, LIBUSB_CONTROL_SETUP_SIZE +
 137                         PACKET_LENGTH);
 138                 memset(devc->xfer_buf_out, 0, LIBUSB_CONTROL_SETUP_SIZE +
 139                         PACKET_LENGTH);
 140
 141                 libusb_fill_control_setup(devc->xfer_buf_in,
 142                         USB_REQUEST_TYPE_IN, USB_HID_GET_REPORT,
 143                         USB_HID_REPORT_TYPE_FEATURE, USB_INTERFACE,
 144                         PACKET_LENGTH);
 145                 libusb_fill_control_setup(devc->xfer_buf_out,
 146                         USB_REQUEST_TYPE_OUT, USB_HID_SET_REPORT,
 147                         USB_HID_REPORT_TYPE_FEATURE, USB_INTERFACE,
 148                         PACKET_LENGTH);
 149
 150                 devc->xfer_data_in = devc->xfer_buf_in +
 151                         LIBUSB_CONTROL_SETUP_SIZE;
 152                 devc->xfer_data_out = devc->xfer_buf_out +
 153                         LIBUSB_CONTROL_SETUP_SIZE;
 154
 155                 drvc->instances = g_slist_append(drvc->instances, sdi);
 156                 devices = g_slist_append(devices, sdi);
 157         }
 158
 159         g_slist_free(usb_devices);
 160
 161         return devices;
 162 }
 163
 164 static GSList *dev_list(const struct sr_dev_driver *di)
 165 {
 166         return ((struct drv_context *)(di->context))->instances;
 167 }
 168
 169 static void clear_dev_context(void *priv)
 170 {
 171         struct dev_context *devc;
 172
 173         devc = priv;
 174
 175         sr_dbg("Device context cleared.");
 176
 177         libusb_free_transfer(devc->xfer_in);
 178         libusb_free_transfer(devc->xfer_out);
 179         g_free(devc);
 180 }
 181
 182 static int dev_clear(const struct sr_dev_driver *di)
 183 {
 184         return std_dev_clear(di, &clear_dev_context);
 185 }
 186
 187 static int dev_open(struct sr_dev_inst *sdi)
 188 {
 189         struct sr_dev_driver *di = sdi->driver;
 190         struct drv_context *drvc;
 191         struct dev_context *devc;
 192         struct sr_usb_dev_inst *usb;
 193         uint8_t buffer[PACKET_LENGTH];
 194         int ret;
 195
 196         if (!(drvc = di->context)) {
 197                 sr_err("Driver was not initialized.");
 198                 return SR_ERR;
 199         }
 200
 201         usb = sdi->conn;
 202         devc = sdi->priv;
 203
 204         if (sr_usb_open(drvc->sr_ctx->libusb_ctx, usb) != SR_OK)
 205                 return SR_ERR;
 206
 207         /*
 208          * Determine if a kernel driver is active on this interface and, if so,
 209          * detach it.
 210          */
 211         if (libusb_kernel_driver_active(usb->devhdl, USB_INTERFACE) == 1) {
 212                 ret = libusb_detach_kernel_driver(usb->devhdl, USB_INTERFACE);
 213                 if (ret < 0) {
 214                         sr_err("Failed to detach kernel driver: %s.",
 215                                 libusb_error_name(ret));
 216                         return SR_ERR;
 217                 }
 218         }
 219
 220         if ((ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE)) < 0) {
 221                 sr_err("Failed to claim interface: %s.",
 222                         libusb_error_name(ret));
 223                 return SR_ERR;
 224         }
 225
 226         libusb_fill_control_transfer(devc->xfer_in, usb->devhdl,
 227                 devc->xfer_buf_in, sl2_receive_transfer_in,
 228                 sdi, USB_TIMEOUT_MS);
 229
 230         libusb_fill_control_transfer(devc->xfer_out, usb->devhdl,
 231                 devc->xfer_buf_out, sl2_receive_transfer_out,
 232                 sdi, USB_TIMEOUT_MS);
 233
 234         memset(buffer, 0, sizeof(buffer));
 235
 236         buffer[0] = CMD_RESET;
 237         if ((ret = sl2_transfer_out(usb->devhdl, buffer)) != PACKET_LENGTH) {
 238                 sr_err("Device reset failed: %s.", libusb_error_name(ret));
 239                 return SR_ERR;
 240         }
 241
 242         /*
 243          * Set the device to idle state. If the device is not in idle state it
 244          * possibly will reset itself after a few seconds without being used
 245          * and thereby close the connection.
 246          */
 247         buffer[0] = CMD_IDLE;
 248         if ((ret = sl2_transfer_out(usb->devhdl, buffer)) != PACKET_LENGTH) {
 249                 sr_err("Failed to set device in idle state: %s.",
 250                         libusb_error_name(ret));
 251                 return SR_ERR;
 252         }
 253
 254         sdi->status = SR_ST_ACTIVE;
 255
 256         return SR_OK;
 257 }
 258
 259 static int dev_close(struct sr_dev_inst *sdi)
 260 {
 261         struct sr_dev_driver *di = sdi->driver;
 262         struct sr_usb_dev_inst *usb;
 263
 264         if (!di->context) {
 265                 sr_err("Driver was not initialized.");
 266                 return SR_ERR;
 267         }
 268
 269         usb = sdi->conn;
 270
 271         if (!usb->devhdl)
 272                 return SR_OK;
 273
 274         libusb_release_interface(usb->devhdl, USB_INTERFACE);
 275         libusb_close(usb->devhdl);
 276
 277         usb->devhdl = NULL;
 278         sdi->status = SR_ST_INACTIVE;
 279
 280         return SR_OK;
 281 }
 282
 283 static int cleanup(const struct sr_dev_driver *di)
 284 {
 285         return dev_clear(di);
 286 }
 287
 288 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 289                 const struct sr_channel_group *cg)
 290 {
 291         struct dev_context *devc;
 292         int ret;
 293
 294         (void)cg;
 295
 296         ret = SR_OK;
 297         devc = sdi->priv;
 298
 299         switch (key) {
 300         case SR_CONF_SAMPLERATE:
 301                 *data = g_variant_new_uint64(devc->samplerate);
 302                 break;
 303         case SR_CONF_CAPTURE_RATIO:
 304                 *data = g_variant_new_uint64(devc->capture_ratio);
 305                 break;
 306         default:
 307                 return SR_ERR_NA;
 308         }
 309
 310         return ret;
 311 }
 312
 313 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 314                 const struct sr_channel_group *cg)
 315 {
 316         uint64_t samplerate, limit_samples, capture_ratio;
 317         int ret;
 318
 319         (void)cg;
 320
 321         if (sdi->status != SR_ST_ACTIVE)
 322                 return SR_ERR_DEV_CLOSED;
 323
 324         ret = SR_OK;
 325
 326         switch (key) {
 327         case SR_CONF_LIMIT_SAMPLES:
 328                 limit_samples = g_variant_get_uint64(data);
 329                 ret = sl2_set_limit_samples(sdi, limit_samples);
 330                 break;
 331         case SR_CONF_SAMPLERATE:
 332                 samplerate = g_variant_get_uint64(data);
 333                 ret = sl2_set_samplerate(sdi, samplerate);
 334                 break;
 335         case SR_CONF_CAPTURE_RATIO:
 336                 capture_ratio = g_variant_get_uint64(data);
 337                 ret = sl2_set_capture_ratio(sdi, capture_ratio);
 338                 break;
 339         default:
 340                 return SR_ERR_NA;
 341         }
 342
 343         return ret;
 344 }
 345
 346 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 347                 const struct sr_channel_group *cg)
 348 {
 349         GVariant *gvar, *grange[2];
 350         GVariantBuilder gvb;
 351         int ret;
 352
 353         (void)sdi;
 354         (void)cg;
 355
 356         ret = SR_OK;
 357         switch (key) {
 358         case SR_CONF_DEVICE_OPTIONS:
 359                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 360                                 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 361                 break;
 362         case SR_CONF_SAMPLERATE:
 363                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 364                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
 365                         sl2_samplerates, ARRAY_SIZE(sl2_samplerates),
 366                         sizeof(uint64_t));
 367                 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
 368                 *data = g_variant_builder_end(&gvb);
 369                 break;
 370         case SR_CONF_TRIGGER_MATCH:
 371                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 372                                 trigger_matches, ARRAY_SIZE(trigger_matches),
 373                                 sizeof(int32_t));
 374                 break;
 375         case SR_CONF_LIMIT_SAMPLES:
 376                 grange[0] = g_variant_new_uint64(0);
 377                 grange[1] = g_variant_new_uint64(MAX_SAMPLES);
 378                 *data = g_variant_new_tuple(grange, 2);
 379                 break;
 380         default:
 381                 return SR_ERR_NA;
 382         }
 383
 384         return ret;
 385 }
 386
 387 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 388 {
 389         struct sr_dev_driver *di = sdi->driver;
 390         struct drv_context *drvc;
 391         struct dev_context *devc;
 392         uint16_t trigger_bytes, tmp;
 393         unsigned int i, j;
 394         int ret;
 395
 396         if (sdi->status != SR_ST_ACTIVE)
 397                 return SR_ERR_DEV_CLOSED;
 398
 399         devc = sdi->priv;
 400         drvc = di->context;
 401
 402         devc->cb_data = cb_data;
 403         devc->wait_data_ready_locked = TRUE;
 404         devc->stopping_in_progress = FALSE;
 405         devc->transfer_error = FALSE;
 406         devc->samples_processed = 0;
 407         devc->channel = 0;
 408         devc->sample_packet = 0;
 409
 410         /*
 411          * The trigger must be configured first because the calculation of the
 412          * pre and post trigger samples depends on a configured trigger.
 413          */
 414         sl2_convert_trigger(sdi);
 415         sl2_calculate_trigger_samples(sdi);
 416
 417         trigger_bytes = devc->pre_trigger_bytes + devc->post_trigger_bytes;
 418
 419         /* Calculate the number of expected sample packets. */
 420         devc->num_sample_packets = trigger_bytes / PACKET_NUM_SAMPLE_BYTES;
 421
 422         /* Round up the number of expected sample packets. */
 423         if (trigger_bytes % PACKET_NUM_SAMPLE_BYTES != 0)
 424                 devc->num_sample_packets++;
 425
 426         devc->num_enabled_channels = 0;
 427
 428         /*
 429          * Count the number of enabled channels and number them for a sequential
 430          * access.
 431          */
 432         for (i = 0, j = 0; i < NUM_CHANNELS; i++) {
 433                 if (devc->channels[i]->enabled) {
 434                         devc->num_enabled_channels++;
 435                         devc->channel_map[j] = i;
 436                         j++;
 437                 }
 438         }
 439
 440         sr_dbg("Number of enabled channels: %i.", devc->num_enabled_channels);
 441
 442         /* Set up the transfer buffer for the acquisition. */
 443         devc->xfer_data_out[0] = CMD_SAMPLE;
 444         devc->xfer_data_out[1] = 0x00;
 445
 446         tmp = GUINT16_TO_LE(devc->pre_trigger_bytes);
 447         memcpy(devc->xfer_data_out + 2, &tmp, sizeof(tmp));
 448
 449         tmp = GUINT16_TO_LE(devc->post_trigger_bytes);
 450         memcpy(devc->xfer_data_out + 4, &tmp, sizeof(tmp));
 451
 452         devc->xfer_data_out[6] = devc->samplerate_id;
 453         devc->xfer_data_out[7] = devc->trigger_type;
 454         devc->xfer_data_out[8] = devc->trigger_channel;
 455         devc->xfer_data_out[9] = 0x00;
 456
 457         tmp = GUINT16_TO_LE(devc->after_trigger_delay);
 458         memcpy(devc->xfer_data_out + 10, &tmp, sizeof(tmp));
 459
 460         if ((ret = libusb_submit_transfer(devc->xfer_out)) != 0) {
 461                 sr_err("Submit transfer failed: %s.", libusb_error_name(ret));
 462                 return SR_ERR;
 463         }
 464
 465         usb_source_add(sdi->session, drvc->sr_ctx, 100,
 466                         ikalogic_scanalogic2_receive_data, (void *)sdi);
 467
 468         sr_dbg("Acquisition started successfully.");
 469
 470         /* Send header packet to the session bus. */
 471         std_session_send_df_header(cb_data, LOG_PREFIX);
 472
 473         devc->next_state = STATE_SAMPLE;
 474
 475         return SR_OK;
 476 }
 477
 478 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 479 {
 480         (void)cb_data;
 481
 482         if (sdi->status != SR_ST_ACTIVE)
 483                 return SR_ERR_DEV_CLOSED;
 484
 485         sr_dbg("Stopping acquisition.");
 486
 487         sdi->status = SR_ST_STOPPING;
 488
 489         return SR_OK;
 490 }
 491
 492 SR_PRIV struct sr_dev_driver ikalogic_scanalogic2_driver_info = {
 493         .name = "ikalogic-scanalogic2",
 494         .longname = "IKALOGIC Scanalogic-2",
 495         .api_version = 1,
 496         .init = init,
 497         .cleanup = cleanup,
 498         .scan = scan,
 499         .dev_list = dev_list,
 500         .dev_clear = dev_clear,
 501         .config_get = config_get,
 502         .config_set = config_set,
 503         .config_list = config_list,
 504         .dev_open = dev_open,
 505         .dev_close = dev_close,
 506         .dev_acquisition_start = dev_acquisition_start,
 507         .dev_acquisition_stop = dev_acquisition_stop,
 508         .context = NULL,
 509 };