2 * This file is part of the libsigrok project.
4 * Copyright (C) 2013 Marc Schink <sigrok-dev@marcschink.de>
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.
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.
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/>.
22 extern struct sr_dev_driver ikalogic_scanalogic2_driver_info;
23 static struct sr_dev_driver *di = &ikalogic_scanalogic2_driver_info;
25 extern uint64_t sl2_samplerates[NUM_SAMPLERATES];
27 static void stop_acquisition(struct sr_dev_inst *sdi)
29 struct dev_context *devc;
30 struct sr_datafeed_packet packet;
35 /* Remove USB file descriptors from polling. */
36 for (i = 0; i < devc->num_usbfd; i++)
37 sr_source_remove(devc->usbfd[i]);
41 packet.type = SR_DF_END;
42 sr_session_send(devc->cb_data, &packet);
44 sdi->status = SR_ST_ACTIVE;
47 static void abort_acquisition(struct sr_dev_inst *sdi)
49 struct dev_context *devc;
50 struct sr_datafeed_packet packet;
55 /* Remove USB file descriptors from polling. */
56 for (i = 0; i < devc->num_usbfd; i++)
57 sr_source_remove(devc->usbfd[i]);
61 packet.type = SR_DF_END;
62 sr_session_send(devc->cb_data, &packet);
64 sdi->driver->dev_close(sdi);
67 static void buffer_sample_data(const struct sr_dev_inst *sdi)
69 struct dev_context *devc;
70 unsigned int offset, packet_length;
74 if (devc->probes[devc->channel]->enabled) {
75 offset = devc->sample_packet * PACKET_NUM_SAMPLE_BYTES;
78 * Determine the packet length to ensure that the last packet
79 * will not exceed the buffer size.
81 packet_length = MIN(PACKET_NUM_SAMPLE_BYTES,
82 MAX_DEV_SAMPLE_BYTES - offset);
85 * Skip the first 4 bytes of the source buffer because they
86 * contain channel and packet information only.
88 memcpy(devc->sample_buffer[devc->channel] + offset,
89 devc->xfer_data_in + 4, packet_length);
93 static void process_sample_data(const struct sr_dev_inst *sdi)
95 struct dev_context *devc;
96 struct sr_datafeed_packet packet;
97 struct sr_datafeed_logic logic;
98 uint8_t i, j, tmp, buffer[PACKET_NUM_SAMPLES], *ptr[NUM_PROBES];
99 uint16_t offset, n = 0;
103 offset = devc->sample_packet * PACKET_NUM_SAMPLE_BYTES;
106 * Array of pointers to the sample data of all channels up to the last
107 * enabled one for an uniform access to them. Note that the currently
108 * received samples always belong to the last enabled channel.
110 for (i = 0; i < devc->num_enabled_probes - 1; i++)
111 ptr[i] = devc->sample_buffer[devc->probe_map[i]] + offset;
114 * Skip the first 4 bytes of the buffer because they contain channel
115 * and packet information only.
117 ptr[i] = devc->xfer_data_in + 4;
119 for (i = 0; i < PACKET_NUM_SAMPLE_BYTES; i++) {
120 /* Stop processing if all requested samples are processed. */
121 if (devc->samples_processed == devc->limit_samples)
126 if (devc->samples_processed == 0) {
128 * Adjust the position of the first sample to be
129 * processed because possibly more samples than
130 * necessary might have been acquired. This is because
131 * the number of acquired samples is always rounded up
132 * to a multiple of 8.
134 k = k - (devc->pre_trigger_bytes * 8) +
135 devc->pre_trigger_samples;
137 sr_dbg("Start processing at sample: %d.", 7 - k);
140 * Send the trigger before the first sample is
141 * processed if no pre trigger samples were calculated
142 * through the capture ratio.
144 if (devc->trigger_type != TRIGGER_TYPE_NONE &&
145 devc->pre_trigger_samples == 0) {
146 packet.type = SR_DF_TRIGGER;
147 sr_session_send(devc->cb_data, &packet);
151 for (; k >= 0; k--) {
153 * Stop processing if all requested samples are
156 if (devc->samples_processed == devc->limit_samples)
162 * Extract the current sample for each enabled channel
163 * and store them in the buffer.
165 for (j = 0; j < devc->num_enabled_probes; j++) {
166 tmp = (ptr[j][i] & (1 << k)) >> k;
167 buffer[n] |= tmp << devc->probe_map[j];
171 devc->samples_processed++;
174 * Send all processed samples and the trigger if the
175 * number of processed samples reaches the calculated
176 * number of pre trigger samples.
178 if (devc->samples_processed == devc->pre_trigger_samples &&
179 devc->trigger_type != TRIGGER_TYPE_NONE) {
180 packet.type = SR_DF_LOGIC;
181 packet.payload = &logic;
185 sr_session_send(devc->cb_data, &packet);
187 packet.type = SR_DF_TRIGGER;
188 sr_session_send(devc->cb_data, &packet);
196 packet.type = SR_DF_LOGIC;
197 packet.payload = &logic;
201 sr_session_send(devc->cb_data, &packet);
205 SR_PRIV int ikalogic_scanalogic2_receive_data(int fd, int revents, void *cb_data)
207 struct sr_dev_inst *sdi;
208 struct dev_context *devc;
209 struct drv_context *drvc;
211 int64_t current_time, time_elapsed;
217 if (!(sdi = cb_data))
220 if (!(devc = sdi->priv))
224 current_time = g_get_monotonic_time();
226 if (devc->state == STATE_WAIT_DATA_READY &&
227 !devc->wait_data_ready_locked) {
228 time_elapsed = current_time - devc->wait_data_ready_time;
231 * Check here for stopping in addition to the transfer
232 * callback functions to avoid waiting until the
233 * WAIT_DATA_READY_INTERVAL has expired.
235 if (sdi->status == SR_ST_STOPPING) {
236 if (!devc->stopping_in_progress) {
237 devc->next_state = STATE_RESET_AND_IDLE;
238 devc->stopping_in_progress = TRUE;
239 ret = libusb_submit_transfer(devc->xfer_in);
241 } else if (time_elapsed >= WAIT_DATA_READY_INTERVAL) {
242 devc->wait_data_ready_locked = TRUE;
243 ret = libusb_submit_transfer(devc->xfer_in);
248 sr_err("Submit transfer failed: %s.", libusb_error_name(ret));
249 abort_acquisition(sdi);
256 libusb_handle_events_timeout_completed(drvc->sr_ctx->libusb_ctx, &tv,
259 /* Check if an error occurred on a transfer. */
260 if (devc->transfer_error)
261 abort_acquisition(sdi);
266 SR_PRIV void sl2_receive_transfer_in( struct libusb_transfer *transfer)
268 struct sr_dev_inst *sdi;
269 struct dev_context *devc;
270 uint8_t last_channel;
273 sdi = transfer->user_data;
276 if (transfer->status != LIBUSB_TRANSFER_COMPLETED) {
277 sr_err("Transfer to device failed: %i.", transfer->status);
278 devc->transfer_error = TRUE;
282 if (sdi->status == SR_ST_STOPPING && !devc->stopping_in_progress) {
283 devc->next_state = STATE_RESET_AND_IDLE;
284 devc->stopping_in_progress = TRUE;
286 if (libusb_submit_transfer(devc->xfer_in) != 0) {
287 sr_err("Submit transfer failed: %s.",
288 libusb_error_name(ret));
289 devc->transfer_error = TRUE;
295 if (devc->state != devc->next_state)
296 sr_spew("State changed from %i to %i.",
297 devc->state, devc->next_state);
298 devc->state = devc->next_state;
300 if (devc->state == STATE_WAIT_DATA_READY) {
301 /* Check if the received data are a valid device status. */
302 if (devc->xfer_data_in[0] == 0x05) {
303 if (devc->xfer_data_in[1] == STATUS_WAITING_FOR_TRIGGER)
304 sr_dbg("Waiting for trigger.");
305 else if (devc->xfer_data_in[1] == STATUS_SAMPLING)
306 sr_dbg("Sampling in progress.");
310 * Check if the received data are a valid device status and the
311 * sample data are ready.
313 if (devc->xfer_data_in[0] == 0x05 &&
314 devc->xfer_data_in[1] == STATUS_DATA_READY) {
315 devc->next_state = STATE_RECEIVE_DATA;
316 ret = libusb_submit_transfer(transfer);
318 devc->wait_data_ready_locked = FALSE;
319 devc->wait_data_ready_time = g_get_monotonic_time();
321 } else if (devc->state == STATE_RECEIVE_DATA) {
322 last_channel = devc->probe_map[devc->num_enabled_probes - 1];
324 if (devc->channel < last_channel) {
325 buffer_sample_data(sdi);
326 } else if (devc->channel == last_channel) {
327 process_sample_data(sdi);
330 * Stop acquisition because all samples of enabled
331 * probes are processed.
333 devc->next_state = STATE_RESET_AND_IDLE;
336 devc->sample_packet++;
337 devc->sample_packet %= devc->num_sample_packets;
339 if (devc->sample_packet == 0)
342 ret = libusb_submit_transfer(transfer);
343 } else if (devc->state == STATE_RESET_AND_IDLE) {
344 /* Check if the received data are a valid device status. */
345 if (devc->xfer_data_in[0] == 0x05) {
346 if (devc->xfer_data_in[1] == STATUS_DEVICE_READY) {
347 devc->next_state = STATE_IDLE;
348 devc->xfer_data_out[0] = CMD_IDLE;
350 devc->next_state = STATE_WAIT_DEVICE_READY;
351 devc->xfer_data_out[0] = CMD_RESET;
354 ret = libusb_submit_transfer(devc->xfer_out);
357 * The received device status is invalid which
358 * indicates that the device is not ready to accept
359 * commands. Request a new device status until a valid
360 * device status is received.
362 ret = libusb_submit_transfer(transfer);
364 } else if (devc->state == STATE_WAIT_DEVICE_READY) {
365 /* Check if the received data are a valid device status. */
366 if (devc->xfer_data_in[0] == 0x05) {
367 if (devc->xfer_data_in[1] == STATUS_DEVICE_READY) {
368 devc->next_state = STATE_IDLE;
369 devc->xfer_data_out[0] = CMD_IDLE;
372 * The received device status is valid but the
373 * device is not ready. Probably the device did
374 * not recognize the last reset. Reset the
377 devc->xfer_data_out[0] = CMD_RESET;
380 ret = libusb_submit_transfer(devc->xfer_out);
383 * The device is not ready and therefore not able to
384 * change to the idle state. Request a new device
385 * status until the device is ready.
387 ret = libusb_submit_transfer(transfer);
392 sr_err("Submit transfer failed: %s.", libusb_error_name(ret));
393 devc->transfer_error = TRUE;
397 SR_PRIV void sl2_receive_transfer_out( struct libusb_transfer *transfer)
399 struct sr_dev_inst *sdi;
400 struct dev_context *devc;
403 sdi = transfer->user_data;
406 if (transfer->status != LIBUSB_TRANSFER_COMPLETED) {
407 sr_err("Transfer to device failed: %i.", transfer->status);
408 devc->transfer_error = TRUE;
412 if (sdi->status == SR_ST_STOPPING && !devc->stopping_in_progress) {
413 devc->next_state = STATE_RESET_AND_IDLE;
414 devc->stopping_in_progress = TRUE;
416 if (libusb_submit_transfer(devc->xfer_in) != 0) {
417 sr_err("Submit transfer failed: %s.",
418 libusb_error_name(ret));
420 devc->transfer_error = TRUE;
426 if (devc->state != devc->next_state)
427 sr_spew("State changed from %i to %i.",
428 devc->state, devc->next_state);
429 devc->state = devc->next_state;
431 if (devc->state == STATE_IDLE) {
432 stop_acquisition(sdi);
433 } else if (devc->state == STATE_SAMPLE) {
434 devc->next_state = STATE_WAIT_DATA_READY;
435 ret = libusb_submit_transfer(devc->xfer_in);
436 } else if (devc->state == STATE_WAIT_DEVICE_READY) {
437 ret = libusb_submit_transfer(devc->xfer_in);
441 sr_err("Submit transfer failed: %s.", libusb_error_name(ret));
442 devc->transfer_error = TRUE;
446 SR_PRIV int sl2_set_samplerate(const struct sr_dev_inst *sdi,
449 struct dev_context *devc;
454 for (i = 0; i < NUM_SAMPLERATES; i++) {
455 if (sl2_samplerates[i] == samplerate) {
456 devc->samplerate = samplerate;
457 devc->samplerate_id = NUM_SAMPLERATES - i - 1;
465 SR_PRIV int sl2_set_limit_samples(const struct sr_dev_inst *sdi,
466 uint64_t limit_samples)
468 struct dev_context *devc;
472 if (limit_samples == 0) {
473 sr_err("Invalid number of limit samples: %" PRIu64 ".",
478 if (limit_samples > MAX_SAMPLES)
479 limit_samples = MAX_SAMPLES;
481 sr_dbg("Limit samples set to %" PRIu64 ".", limit_samples);
483 devc->limit_samples = limit_samples;
488 SR_PRIV void sl2_configure_trigger(const struct sr_dev_inst *sdi)
490 struct dev_context *devc;
491 struct sr_probe *probe;
492 uint8_t trigger_type;
493 int probe_index, num_triggers_anyedge;
499 /* Disable the trigger by default. */
500 devc->trigger_channel = TRIGGER_CHANNEL_0;
501 devc->trigger_type = TRIGGER_TYPE_NONE;
503 num_triggers_anyedge = 0;
505 for (l = sdi->probes, probe_index = 0; l; l = l->next, probe_index++) {
507 trigger = probe->trigger;
509 if (!trigger || !probe->enabled)
514 trigger_type = TRIGGER_TYPE_POSEDGE;
517 trigger_type = TRIGGER_TYPE_NEGEDGE;
520 trigger_type = TRIGGER_TYPE_ANYEDGE;
521 num_triggers_anyedge++;
527 devc->trigger_channel = probe_index + 1;
528 devc->trigger_type = trigger_type;
532 * Set trigger to any edge on all channels if the trigger for each
533 * channel is set to any edge.
535 if (num_triggers_anyedge == NUM_PROBES) {
536 devc->trigger_channel = TRIGGER_CHANNEL_ALL;
537 devc->trigger_type = TRIGGER_TYPE_ANYEDGE;
540 sr_dbg("Trigger set to channel 0x%02x and type 0x%02x.",
541 devc->trigger_channel, devc->trigger_type);
544 SR_PRIV int sl2_set_capture_ratio(const struct sr_dev_inst *sdi,
545 uint64_t capture_ratio)
547 struct dev_context *devc;
551 if (capture_ratio > 100) {
552 sr_err("Invalid capture ratio: %" PRIu64 " %%.", capture_ratio);
556 sr_info("Capture ratio set to %" PRIu64 " %%.", capture_ratio);
558 devc->capture_ratio = capture_ratio;
563 SR_PRIV int sl2_set_after_trigger_delay(const struct sr_dev_inst *sdi,
564 uint64_t after_trigger_delay)
566 struct dev_context *devc;
570 if (after_trigger_delay > MAX_AFTER_TRIGGER_DELAY) {
571 sr_err("Invalid after trigger delay: %" PRIu64 " ms.",
572 after_trigger_delay);
576 sr_info("After trigger delay set to %" PRIu64 " ms.",
577 after_trigger_delay);
579 devc->after_trigger_delay = after_trigger_delay;
584 SR_PRIV void sl2_calculate_trigger_samples(const struct sr_dev_inst *sdi)
586 struct dev_context *devc;
587 uint64_t pre_trigger_samples, post_trigger_samples;
588 uint16_t pre_trigger_bytes, post_trigger_bytes;
592 cr = devc->capture_ratio;
594 /* Ignore the capture ratio if no trigger is enabled. */
595 if (devc->trigger_type == TRIGGER_TYPE_NONE)
598 pre_trigger_samples = (devc->limit_samples * cr) / 100;
599 post_trigger_samples = (devc->limit_samples * (100 - cr)) / 100;
602 * Increase the number of post trigger samples by one to compensate the
603 * possible loss of a sample through integer rounding.
605 if (pre_trigger_samples + post_trigger_samples != devc->limit_samples)
606 post_trigger_samples++;
609 * The device requires the number of samples in multiples of 8 which
610 * will also be called sample bytes in the following.
612 pre_trigger_bytes = pre_trigger_samples / 8;
613 post_trigger_bytes = post_trigger_samples / 8;
616 * Round up the number of sample bytes to ensure that at least the
617 * requested number of samples will be acquired. Note that due to this
618 * rounding the buffer to store these sample bytes needs to be at least
619 * one sample byte larger than the minimal number of sample bytes
620 * needed to store the requested samples.
622 if (pre_trigger_samples % 8 != 0)
625 if (post_trigger_samples % 8 != 0)
626 post_trigger_bytes++;
628 sr_info("Pre trigger samples: %" PRIu64 ".", pre_trigger_samples);
629 sr_info("Post trigger samples: %" PRIu64 ".", post_trigger_samples);
630 sr_dbg("Pre trigger sample bytes: %" PRIu16 ".", pre_trigger_bytes);
631 sr_dbg("Post trigger sample bytes: %" PRIu16 ".", post_trigger_bytes);
633 devc->pre_trigger_samples = pre_trigger_samples;
634 devc->pre_trigger_bytes = pre_trigger_bytes;
635 devc->post_trigger_bytes = post_trigger_bytes;
638 SR_PRIV int sl2_get_device_info(struct sr_usb_dev_inst usb,
639 struct device_info *dev_info)
641 struct drv_context *drvc;
642 uint8_t buffer[PACKET_LENGTH];
650 if (sr_usb_open(drvc->sr_ctx->libusb_ctx, &usb) != SR_OK)
654 * Determine if a kernel driver is active on this interface and, if so,
657 if (libusb_kernel_driver_active(usb.devhdl, USB_INTERFACE) == 1) {
658 ret = libusb_detach_kernel_driver(usb.devhdl,
662 sr_err("Failed to detach kernel driver: %s.",
663 libusb_error_name(ret));
664 libusb_close(usb.devhdl);
669 ret = libusb_claim_interface(usb.devhdl, USB_INTERFACE);
672 sr_err("Failed to claim interface: %s.",
673 libusb_error_name(ret));
674 libusb_close(usb.devhdl);
678 memset(buffer, 0, sizeof(buffer));
681 * Reset the device to ensure it is in a proper state to request the
682 * device information.
684 buffer[0] = CMD_RESET;
685 if ((ret = sl2_transfer_out(usb.devhdl, buffer)) != PACKET_LENGTH) {
686 sr_err("Resetting of device failed: %s.",
687 libusb_error_name(ret));
688 libusb_release_interface(usb.devhdl, USB_INTERFACE);
689 libusb_close(usb.devhdl);
693 buffer[0] = CMD_INFO;
694 if ((ret = sl2_transfer_out(usb.devhdl, buffer)) != PACKET_LENGTH) {
695 sr_err("Requesting of device information failed: %s.",
696 libusb_error_name(ret));
697 libusb_release_interface(usb.devhdl, USB_INTERFACE);
698 libusb_close(usb.devhdl);
702 if ((ret = sl2_transfer_in(usb.devhdl, buffer)) != PACKET_LENGTH) {
703 sr_err("Receiving of device information failed: %s.",
704 libusb_error_name(ret));
705 libusb_release_interface(usb.devhdl, USB_INTERFACE);
706 libusb_close(usb.devhdl);
710 memcpy(&(dev_info->serial), buffer + 1, sizeof(uint32_t));
711 dev_info->serial = GUINT32_FROM_LE(dev_info->serial);
713 dev_info->fw_ver_major = buffer[5];
714 dev_info->fw_ver_minor = buffer[6];
716 buffer[0] = CMD_RESET;
717 if ((ret = sl2_transfer_out(usb.devhdl, buffer)) != PACKET_LENGTH) {
718 sr_err("Device reset failed: %s.", libusb_error_name(ret));
719 libusb_release_interface(usb.devhdl, USB_INTERFACE);
720 libusb_close(usb.devhdl);
725 * Set the device to idle state. If the device is not in idle state it
726 * possibly will reset itself after a few seconds without being used
727 * and thereby close the connection.
729 buffer[0] = CMD_IDLE;
730 if ((ret = sl2_transfer_out(usb.devhdl, buffer)) != PACKET_LENGTH) {
731 sr_err("Failed to set device in idle state: %s.",
732 libusb_error_name(ret));
733 libusb_release_interface(usb.devhdl, USB_INTERFACE);
734 libusb_close(usb.devhdl);
738 ret = libusb_release_interface(usb.devhdl, USB_INTERFACE);
741 sr_err("Failed to release interface: %s.",
742 libusb_error_name(ret));
743 libusb_close(usb.devhdl);
747 libusb_close(usb.devhdl);
752 SR_PRIV int sl2_transfer_in(libusb_device_handle *dev_handle, uint8_t *data)
754 return libusb_control_transfer(dev_handle, USB_REQUEST_TYPE_IN,
755 USB_HID_GET_REPORT, USB_HID_REPORT_TYPE_FEATURE, USB_INTERFACE,
756 (unsigned char *)data, PACKET_LENGTH, USB_TIMEOUT);
759 SR_PRIV int sl2_transfer_out(libusb_device_handle *dev_handle, uint8_t *data)
761 return libusb_control_transfer(dev_handle, USB_REQUEST_TYPE_OUT,
762 USB_HID_SET_REPORT, USB_HID_REPORT_TYPE_FEATURE, USB_INTERFACE,
763 (unsigned char *)data, PACKET_LENGTH, USB_TIMEOUT);