--- /dev/null
+/*
+ * This file is part of the libsigrok project.
+ *
+ * Copyright (C) 2013 Marc Schink <sigrok-dev@marcschink.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "protocol.h"
+
+extern struct sr_dev_driver ikalogic_scanalogic2_driver_info;
+static struct sr_dev_driver *di = &ikalogic_scanalogic2_driver_info;
+
+extern uint64_t sl2_samplerates[NUM_SAMPLERATES];
+
+static void stop_acquisition(struct sr_dev_inst *sdi)
+{
+ struct drv_context *drvc = sdi->driver->priv;
+ struct dev_context *devc;
+ struct sr_datafeed_packet packet;
+
+ devc = sdi->priv;
+
+ /* Remove USB file descriptors from polling. */
+ usb_source_remove(sdi->session, drvc->sr_ctx);
+
+ packet.type = SR_DF_END;
+ sr_session_send(devc->cb_data, &packet);
+
+ sdi->status = SR_ST_ACTIVE;
+}
+
+static void abort_acquisition(struct sr_dev_inst *sdi)
+{
+ struct drv_context *drvc = sdi->driver->priv;
+ struct dev_context *devc;
+ struct sr_datafeed_packet packet;
+
+ devc = sdi->priv;
+
+ /* Remove USB file descriptors from polling. */
+ usb_source_remove(sdi->session, drvc->sr_ctx);
+
+ packet.type = SR_DF_END;
+ sr_session_send(devc->cb_data, &packet);
+
+ sdi->driver->dev_close(sdi);
+}
+
+static void buffer_sample_data(const struct sr_dev_inst *sdi)
+{
+ struct dev_context *devc;
+ unsigned int offset, packet_length;
+
+ devc = sdi->priv;
+
+ if (devc->channels[devc->channel]->enabled) {
+ offset = devc->sample_packet * PACKET_NUM_SAMPLE_BYTES;
+
+ /*
+ * Determine the packet length to ensure that the last packet
+ * will not exceed the buffer size.
+ */
+ packet_length = MIN(PACKET_NUM_SAMPLE_BYTES,
+ MAX_DEV_SAMPLE_BYTES - offset);
+
+ /*
+ * Skip the first 4 bytes of the source buffer because they
+ * contain channel and packet information only.
+ */
+ memcpy(devc->sample_buffer[devc->channel] + offset,
+ devc->xfer_data_in + 4, packet_length);
+ }
+}
+
+static void process_sample_data(const struct sr_dev_inst *sdi)
+{
+ struct dev_context *devc;
+ struct sr_datafeed_packet packet;
+ struct sr_datafeed_logic logic;
+ uint8_t i, j, tmp, buffer[PACKET_NUM_SAMPLES], *ptr[NUM_CHANNELS];
+ uint16_t offset, n = 0;
+ int8_t k;
+
+ devc = sdi->priv;
+ offset = devc->sample_packet * PACKET_NUM_SAMPLE_BYTES;
+
+ /*
+ * Array of pointers to the sample data of all channels up to the last
+ * enabled one for an uniform access to them. Note that the currently
+ * received samples always belong to the last enabled channel.
+ */
+ for (i = 0; i < devc->num_enabled_channels - 1; i++)
+ ptr[i] = devc->sample_buffer[devc->channel_map[i]] + offset;
+
+ /*
+ * Skip the first 4 bytes of the buffer because they contain channel
+ * and packet information only.
+ */
+ ptr[i] = devc->xfer_data_in + 4;
+
+ for (i = 0; i < PACKET_NUM_SAMPLE_BYTES; i++) {
+ /* Stop processing if all requested samples are processed. */
+ if (devc->samples_processed == devc->limit_samples)
+ break;
+
+ k = 7;
+
+ if (devc->samples_processed == 0) {
+ /*
+ * Adjust the position of the first sample to be
+ * processed because possibly more samples than
+ * necessary might have been acquired. This is because
+ * the number of acquired samples is always rounded up
+ * to a multiple of 8.
+ */
+ k = k - (devc->pre_trigger_bytes * 8) +
+ devc->pre_trigger_samples;
+
+ sr_dbg("Start processing at sample: %d.", 7 - k);
+
+ /*
+ * Send the trigger before the first sample is
+ * processed if no pre trigger samples were calculated
+ * through the capture ratio.
+ */
+ if (devc->trigger_type != TRIGGER_TYPE_NONE &&
+ devc->pre_trigger_samples == 0) {
+ packet.type = SR_DF_TRIGGER;
+ sr_session_send(devc->cb_data, &packet);
+ }
+ }
+
+ for (; k >= 0; k--) {
+ /*
+ * Stop processing if all requested samples are
+ * processed.
+ */
+ if (devc->samples_processed == devc->limit_samples)
+ break;
+
+ buffer[n] = 0;
+
+ /*
+ * Extract the current sample for each enabled channel
+ * and store them in the buffer.
+ */
+ for (j = 0; j < devc->num_enabled_channels; j++) {
+ tmp = (ptr[j][i] & (1 << k)) >> k;
+ buffer[n] |= tmp << devc->channel_map[j];
+ }
+
+ n++;
+ devc->samples_processed++;
+
+ /*
+ * Send all processed samples and the trigger if the
+ * number of processed samples reaches the calculated
+ * number of pre trigger samples.
+ */
+ if (devc->samples_processed == devc->pre_trigger_samples &&
+ devc->trigger_type != TRIGGER_TYPE_NONE) {
+ packet.type = SR_DF_LOGIC;
+ packet.payload = &logic;
+ logic.length = n;
+ logic.unitsize = 1;
+ logic.data = buffer;
+ sr_session_send(devc->cb_data, &packet);
+
+ packet.type = SR_DF_TRIGGER;
+ sr_session_send(devc->cb_data, &packet);
+
+ n = 0;
+ }
+ }
+ }
+
+ if (n > 0) {
+ packet.type = SR_DF_LOGIC;
+ packet.payload = &logic;
+ logic.length = n;
+ logic.unitsize = 1;
+ logic.data = buffer;
+ sr_session_send(devc->cb_data, &packet);
+ }
+}
+
+SR_PRIV int ikalogic_scanalogic2_receive_data(int fd, int revents, void *cb_data)
+{
+ struct sr_dev_inst *sdi;
+ struct dev_context *devc;
+ struct drv_context *drvc;
+ struct timeval tv;
+ int64_t current_time, time_elapsed;
+ int ret = 0;
+
+ (void)fd;
+ (void)revents;
+
+ if (!(sdi = cb_data))
+ return TRUE;
+
+ if (!(devc = sdi->priv))
+ return TRUE;
+
+ drvc = di->priv;
+ current_time = g_get_monotonic_time();
+
+ if (devc->state == STATE_WAIT_DATA_READY &&
+ !devc->wait_data_ready_locked) {
+ time_elapsed = current_time - devc->wait_data_ready_time;
+
+ /*
+ * Check here for stopping in addition to the transfer
+ * callback functions to avoid waiting until the
+ * WAIT_DATA_READY_INTERVAL has expired.
+ */
+ if (sdi->status == SR_ST_STOPPING) {
+ if (!devc->stopping_in_progress) {
+ devc->next_state = STATE_RESET_AND_IDLE;
+ devc->stopping_in_progress = TRUE;
+ ret = libusb_submit_transfer(devc->xfer_in);
+ }
+ } else if (time_elapsed >= WAIT_DATA_READY_INTERVAL) {
+ devc->wait_data_ready_locked = TRUE;
+ ret = libusb_submit_transfer(devc->xfer_in);
+ }
+ }
+
+ if (ret != 0) {
+ sr_err("Submit transfer failed: %s.", libusb_error_name(ret));
+ abort_acquisition(sdi);
+ return TRUE;
+ }
+
+ tv.tv_sec = 0;
+ tv.tv_usec = 0;
+
+ libusb_handle_events_timeout_completed(drvc->sr_ctx->libusb_ctx, &tv,
+ NULL);
+
+ /* Check if an error occurred on a transfer. */
+ if (devc->transfer_error)
+ abort_acquisition(sdi);
+
+ return TRUE;
+}
+
+SR_PRIV void sl2_receive_transfer_in( struct libusb_transfer *transfer)
+{
+ struct sr_dev_inst *sdi;
+ struct dev_context *devc;
+ uint8_t last_channel;
+ int ret = 0;
+
+ sdi = transfer->user_data;
+ devc = sdi->priv;
+
+ if (transfer->status != LIBUSB_TRANSFER_COMPLETED) {
+ sr_err("Transfer to device failed: %i.", transfer->status);
+ devc->transfer_error = TRUE;
+ return;
+ }
+
+ if (sdi->status == SR_ST_STOPPING && !devc->stopping_in_progress) {
+ devc->next_state = STATE_RESET_AND_IDLE;
+ devc->stopping_in_progress = TRUE;
+
+ if (libusb_submit_transfer(devc->xfer_in) != 0) {
+ sr_err("Submit transfer failed: %s.",
+ libusb_error_name(ret));
+ devc->transfer_error = TRUE;
+ }
+
+ return;
+ }
+
+ if (devc->state != devc->next_state)
+ sr_spew("State changed from %i to %i.",
+ devc->state, devc->next_state);
+ devc->state = devc->next_state;
+
+ if (devc->state == STATE_WAIT_DATA_READY) {
+ /* Check if the received data are a valid device status. */
+ if (devc->xfer_data_in[0] == 0x05) {
+ if (devc->xfer_data_in[1] == STATUS_WAITING_FOR_TRIGGER)
+ sr_dbg("Waiting for trigger.");
+ else if (devc->xfer_data_in[1] == STATUS_SAMPLING)
+ sr_dbg("Sampling in progress.");
+ }
+
+ /*
+ * Check if the received data are a valid device status and the
+ * sample data are ready.
+ */
+ if (devc->xfer_data_in[0] == 0x05 &&
+ devc->xfer_data_in[1] == STATUS_DATA_READY) {
+ devc->next_state = STATE_RECEIVE_DATA;
+ ret = libusb_submit_transfer(transfer);
+ } else {
+ devc->wait_data_ready_locked = FALSE;
+ devc->wait_data_ready_time = g_get_monotonic_time();
+ }
+ } else if (devc->state == STATE_RECEIVE_DATA) {
+ last_channel = devc->channel_map[devc->num_enabled_channels - 1];
+
+ if (devc->channel < last_channel) {
+ buffer_sample_data(sdi);
+ } else if (devc->channel == last_channel) {
+ process_sample_data(sdi);
+ } else {
+ /*
+ * Stop acquisition because all samples of enabled
+ * channels are processed.
+ */
+ devc->next_state = STATE_RESET_AND_IDLE;
+ }
+
+ devc->sample_packet++;
+ devc->sample_packet %= devc->num_sample_packets;
+
+ if (devc->sample_packet == 0)
+ devc->channel++;
+
+ ret = libusb_submit_transfer(transfer);
+ } else if (devc->state == STATE_RESET_AND_IDLE) {
+ /* Check if the received data are a valid device status. */
+ if (devc->xfer_data_in[0] == 0x05) {
+ if (devc->xfer_data_in[1] == STATUS_DEVICE_READY) {
+ devc->next_state = STATE_IDLE;
+ devc->xfer_data_out[0] = CMD_IDLE;
+ } else {
+ devc->next_state = STATE_WAIT_DEVICE_READY;
+ devc->xfer_data_out[0] = CMD_RESET;
+ }
+
+ ret = libusb_submit_transfer(devc->xfer_out);
+ } else {
+ /*
+ * The received device status is invalid which
+ * indicates that the device is not ready to accept
+ * commands. Request a new device status until a valid
+ * device status is received.
+ */
+ ret = libusb_submit_transfer(transfer);
+ }
+ } else if (devc->state == STATE_WAIT_DEVICE_READY) {
+ /* Check if the received data are a valid device status. */
+ if (devc->xfer_data_in[0] == 0x05) {
+ if (devc->xfer_data_in[1] == STATUS_DEVICE_READY) {
+ devc->next_state = STATE_IDLE;
+ devc->xfer_data_out[0] = CMD_IDLE;
+ } else {
+ /*
+ * The received device status is valid but the
+ * device is not ready. Probably the device did
+ * not recognize the last reset. Reset the
+ * device again.
+ */
+ devc->xfer_data_out[0] = CMD_RESET;
+ }
+
+ ret = libusb_submit_transfer(devc->xfer_out);
+ } else {
+ /*
+ * The device is not ready and therefore not able to
+ * change to the idle state. Request a new device
+ * status until the device is ready.
+ */
+ ret = libusb_submit_transfer(transfer);
+ }
+ }
+
+ if (ret != 0) {
+ sr_err("Submit transfer failed: %s.", libusb_error_name(ret));
+ devc->transfer_error = TRUE;
+ }
+}
+
+SR_PRIV void sl2_receive_transfer_out( struct libusb_transfer *transfer)
+{
+ struct sr_dev_inst *sdi;
+ struct dev_context *devc;
+ int ret = 0;
+
+ sdi = transfer->user_data;
+ devc = sdi->priv;
+
+ if (transfer->status != LIBUSB_TRANSFER_COMPLETED) {
+ sr_err("Transfer to device failed: %i.", transfer->status);
+ devc->transfer_error = TRUE;
+ return;
+ }
+
+ if (sdi->status == SR_ST_STOPPING && !devc->stopping_in_progress) {
+ devc->next_state = STATE_RESET_AND_IDLE;
+ devc->stopping_in_progress = TRUE;
+
+ if (libusb_submit_transfer(devc->xfer_in) != 0) {
+ sr_err("Submit transfer failed: %s.",
+ libusb_error_name(ret));
+
+ devc->transfer_error = TRUE;
+ }
+
+ return;
+ }
+
+ if (devc->state != devc->next_state)
+ sr_spew("State changed from %i to %i.",
+ devc->state, devc->next_state);
+ devc->state = devc->next_state;
+
+ if (devc->state == STATE_IDLE) {
+ stop_acquisition(sdi);
+ } else if (devc->state == STATE_SAMPLE) {
+ devc->next_state = STATE_WAIT_DATA_READY;
+ ret = libusb_submit_transfer(devc->xfer_in);
+ } else if (devc->state == STATE_WAIT_DEVICE_READY) {
+ ret = libusb_submit_transfer(devc->xfer_in);
+ }
+
+ if (ret != 0) {
+ sr_err("Submit transfer failed: %s.", libusb_error_name(ret));
+ devc->transfer_error = TRUE;
+ }
+}
+
+SR_PRIV int sl2_set_samplerate(const struct sr_dev_inst *sdi,
+ uint64_t samplerate)
+{
+ struct dev_context *devc;
+ unsigned int i;
+
+ devc = sdi->priv;
+
+ for (i = 0; i < NUM_SAMPLERATES; i++) {
+ if (sl2_samplerates[i] == samplerate) {
+ devc->samplerate = samplerate;
+ devc->samplerate_id = NUM_SAMPLERATES - i - 1;
+ return SR_OK;
+ }
+ }
+
+ return SR_ERR_ARG;
+}
+
+SR_PRIV int sl2_set_limit_samples(const struct sr_dev_inst *sdi,
+ uint64_t limit_samples)
+{
+ struct dev_context *devc;
+
+ devc = sdi->priv;
+
+ if (limit_samples == 0) {
+ sr_err("Invalid number of limit samples: %" PRIu64 ".",
+ limit_samples);
+ return SR_ERR_ARG;
+ }
+
+ if (limit_samples > MAX_SAMPLES)
+ limit_samples = MAX_SAMPLES;
+
+ sr_dbg("Limit samples set to %" PRIu64 ".", limit_samples);
+
+ devc->limit_samples = limit_samples;
+
+ return SR_OK;
+}
+
+SR_PRIV int sl2_convert_trigger(const struct sr_dev_inst *sdi)
+{
+ struct dev_context *devc;
+ struct sr_trigger *trigger;
+ struct sr_trigger_stage *stage;
+ struct sr_trigger_match *match;
+ const GSList *l, *m;
+ int num_triggers_anyedge;
+
+ devc = sdi->priv;
+
+ /* Disable the trigger by default. */
+ devc->trigger_channel = TRIGGER_CHANNEL_0;
+ devc->trigger_type = TRIGGER_TYPE_NONE;
+
+ if (!(trigger = sr_session_trigger_get(sdi->session)))
+ return SR_OK;
+
+ if (g_slist_length(trigger->stages) > 1) {
+ sr_err("This device only supports 1 trigger stage.");
+ return SR_ERR;
+ }
+
+ num_triggers_anyedge = 0;
+ for (l = trigger->stages; l; l = l->next) {
+ stage = l->data;
+ for (m = stage->matches; m; m = m->next) {
+ match = m->data;
+ if (!match->channel->enabled)
+ /* Ignore disabled channels with a trigger. */
+ continue;
+ devc->trigger_channel = match->channel->index + 1;
+ switch (match->match) {
+ case SR_TRIGGER_RISING:
+ devc->trigger_type = TRIGGER_TYPE_POSEDGE;
+ break;
+ case SR_TRIGGER_FALLING:
+ devc->trigger_type = TRIGGER_TYPE_NEGEDGE;
+ break;
+ case SR_TRIGGER_EDGE:
+ devc->trigger_type = TRIGGER_TYPE_ANYEDGE;
+ num_triggers_anyedge++;
+ break;
+ }
+ }
+ }
+
+ /*
+ * Set trigger to any edge on all channels if the trigger for each
+ * channel is set to any edge.
+ */
+ if (num_triggers_anyedge == NUM_CHANNELS) {
+ devc->trigger_channel = TRIGGER_CHANNEL_ALL;
+ devc->trigger_type = TRIGGER_TYPE_ANYEDGE;
+ }
+
+ sr_dbg("Trigger set to channel 0x%02x and type 0x%02x.",
+ devc->trigger_channel, devc->trigger_type);
+
+ return SR_OK;
+}
+
+SR_PRIV int sl2_set_capture_ratio(const struct sr_dev_inst *sdi,
+ uint64_t capture_ratio)
+{
+ struct dev_context *devc;
+
+ devc = sdi->priv;
+
+ if (capture_ratio > 100) {
+ sr_err("Invalid capture ratio: %" PRIu64 " %%.", capture_ratio);
+ return SR_ERR_ARG;
+ }
+
+ sr_info("Capture ratio set to %" PRIu64 " %%.", capture_ratio);
+
+ devc->capture_ratio = capture_ratio;
+
+ return SR_OK;
+}
+
+SR_PRIV int sl2_set_after_trigger_delay(const struct sr_dev_inst *sdi,
+ uint64_t after_trigger_delay)
+{
+ struct dev_context *devc;
+
+ devc = sdi->priv;
+
+ if (after_trigger_delay > MAX_AFTER_TRIGGER_DELAY) {
+ sr_err("Invalid after trigger delay: %" PRIu64 " ms.",
+ after_trigger_delay);
+ return SR_ERR_ARG;
+ }
+
+ sr_info("After trigger delay set to %" PRIu64 " ms.",
+ after_trigger_delay);
+
+ devc->after_trigger_delay = after_trigger_delay;
+
+ return SR_OK;
+}
+
+SR_PRIV void sl2_calculate_trigger_samples(const struct sr_dev_inst *sdi)
+{
+ struct dev_context *devc;
+ uint64_t pre_trigger_samples, post_trigger_samples;
+ uint16_t pre_trigger_bytes, post_trigger_bytes;
+ uint8_t cr;
+
+ devc = sdi->priv;
+ cr = devc->capture_ratio;
+
+ /* Ignore the capture ratio if no trigger is enabled. */
+ if (devc->trigger_type == TRIGGER_TYPE_NONE)
+ cr = 0;
+
+ pre_trigger_samples = (devc->limit_samples * cr) / 100;
+ post_trigger_samples = (devc->limit_samples * (100 - cr)) / 100;
+
+ /*
+ * Increase the number of post trigger samples by one to compensate the
+ * possible loss of a sample through integer rounding.
+ */
+ if (pre_trigger_samples + post_trigger_samples != devc->limit_samples)
+ post_trigger_samples++;
+
+ /*
+ * The device requires the number of samples in multiples of 8 which
+ * will also be called sample bytes in the following.
+ */
+ pre_trigger_bytes = pre_trigger_samples / 8;
+ post_trigger_bytes = post_trigger_samples / 8;
+
+ /*
+ * Round up the number of sample bytes to ensure that at least the
+ * requested number of samples will be acquired. Note that due to this
+ * rounding the buffer to store these sample bytes needs to be at least
+ * one sample byte larger than the minimal number of sample bytes
+ * needed to store the requested samples.
+ */
+ if (pre_trigger_samples % 8 != 0)
+ pre_trigger_bytes++;
+
+ if (post_trigger_samples % 8 != 0)
+ post_trigger_bytes++;
+
+ sr_info("Pre trigger samples: %" PRIu64 ".", pre_trigger_samples);
+ sr_info("Post trigger samples: %" PRIu64 ".", post_trigger_samples);
+ sr_dbg("Pre trigger sample bytes: %" PRIu16 ".", pre_trigger_bytes);
+ sr_dbg("Post trigger sample bytes: %" PRIu16 ".", post_trigger_bytes);
+
+ devc->pre_trigger_samples = pre_trigger_samples;
+ devc->pre_trigger_bytes = pre_trigger_bytes;
+ devc->post_trigger_bytes = post_trigger_bytes;
+}
+
+SR_PRIV int sl2_get_device_info(struct sr_usb_dev_inst usb,
+ struct device_info *dev_info)
+{
+ struct drv_context *drvc;
+ uint8_t buffer[PACKET_LENGTH];
+ int ret;
+
+ drvc = di->priv;
+
+ if (!dev_info)
+ return SR_ERR_ARG;
+
+ if (sr_usb_open(drvc->sr_ctx->libusb_ctx, &usb) != SR_OK)
+ return SR_ERR;
+
+ /*
+ * Determine if a kernel driver is active on this interface and, if so,
+ * detach it.
+ */
+ if (libusb_kernel_driver_active(usb.devhdl, USB_INTERFACE) == 1) {
+ ret = libusb_detach_kernel_driver(usb.devhdl,
+ USB_INTERFACE);
+
+ if (ret < 0) {
+ sr_err("Failed to detach kernel driver: %s.",
+ libusb_error_name(ret));
+ libusb_close(usb.devhdl);
+ return SR_ERR;
+ }
+ }
+
+ ret = libusb_claim_interface(usb.devhdl, USB_INTERFACE);
+
+ if (ret) {
+ sr_err("Failed to claim interface: %s.",
+ libusb_error_name(ret));
+ libusb_close(usb.devhdl);
+ return SR_ERR;
+ }
+
+ memset(buffer, 0, sizeof(buffer));
+
+ /*
+ * Reset the device to ensure it is in a proper state to request the
+ * device information.
+ */
+ buffer[0] = CMD_RESET;
+ if ((ret = sl2_transfer_out(usb.devhdl, buffer)) != PACKET_LENGTH) {
+ sr_err("Resetting of device failed: %s.",
+ libusb_error_name(ret));
+ libusb_release_interface(usb.devhdl, USB_INTERFACE);
+ libusb_close(usb.devhdl);
+ return SR_ERR;
+ }
+
+ buffer[0] = CMD_INFO;
+ if ((ret = sl2_transfer_out(usb.devhdl, buffer)) != PACKET_LENGTH) {
+ sr_err("Requesting of device information failed: %s.",
+ libusb_error_name(ret));
+ libusb_release_interface(usb.devhdl, USB_INTERFACE);
+ libusb_close(usb.devhdl);
+ return SR_ERR;
+ }
+
+ if ((ret = sl2_transfer_in(usb.devhdl, buffer)) != PACKET_LENGTH) {
+ sr_err("Receiving of device information failed: %s.",
+ libusb_error_name(ret));
+ libusb_release_interface(usb.devhdl, USB_INTERFACE);
+ libusb_close(usb.devhdl);
+ return SR_ERR;
+ }
+
+ memcpy(&(dev_info->serial), buffer + 1, sizeof(uint32_t));
+ dev_info->serial = GUINT32_FROM_LE(dev_info->serial);
+
+ dev_info->fw_ver_major = buffer[5];
+ dev_info->fw_ver_minor = buffer[6];
+
+ buffer[0] = CMD_RESET;
+ if ((ret = sl2_transfer_out(usb.devhdl, buffer)) != PACKET_LENGTH) {
+ sr_err("Device reset failed: %s.", libusb_error_name(ret));
+ libusb_release_interface(usb.devhdl, USB_INTERFACE);
+ libusb_close(usb.devhdl);
+ return SR_ERR;
+ }
+
+ /*
+ * Set the device to idle state. If the device is not in idle state it
+ * possibly will reset itself after a few seconds without being used
+ * and thereby close the connection.
+ */
+ buffer[0] = CMD_IDLE;
+ if ((ret = sl2_transfer_out(usb.devhdl, buffer)) != PACKET_LENGTH) {
+ sr_err("Failed to set device in idle state: %s.",
+ libusb_error_name(ret));
+ libusb_release_interface(usb.devhdl, USB_INTERFACE);
+ libusb_close(usb.devhdl);
+ return SR_ERR;
+ }
+
+ ret = libusb_release_interface(usb.devhdl, USB_INTERFACE);
+
+ if (ret < 0) {
+ sr_err("Failed to release interface: %s.",
+ libusb_error_name(ret));
+ libusb_close(usb.devhdl);
+ return SR_ERR;
+ }
+
+ libusb_close(usb.devhdl);
+
+ return SR_OK;
+}
+
+SR_PRIV int sl2_transfer_in(libusb_device_handle *dev_handle, uint8_t *data)
+{
+ return libusb_control_transfer(dev_handle, USB_REQUEST_TYPE_IN,
+ USB_HID_GET_REPORT, USB_HID_REPORT_TYPE_FEATURE, USB_INTERFACE,
+ (unsigned char *)data, PACKET_LENGTH, USB_TIMEOUT);
+}
+
+SR_PRIV int sl2_transfer_out(libusb_device_handle *dev_handle, uint8_t *data)
+{
+ return libusb_control_transfer(dev_handle, USB_REQUEST_TYPE_OUT,
+ USB_HID_SET_REPORT, USB_HID_REPORT_TYPE_FEATURE, USB_INTERFACE,
+ (unsigned char *)data, PACKET_LENGTH, USB_TIMEOUT);
+}
projects / libsigrok.git / blobdiff