--- /dev/null
+/*
+ * This file is part of the libsigrok project.
+ *
+ * Copyright 2014 Google, Inc
+ *
+ * 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 2 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 <config.h>
+#include <libusb.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#include <libsigrok/libsigrok.h>
+#include "libsigrok-internal.h"
+#include "protocol.h"
+
+#define TWINKIE_VID 0x18d1
+#define TWINKIE_PID 0x500a
+
+#define USB_INTERFACE 1
+#define USB_CONFIGURATION 1
+
+#define MAX_RENUM_DELAY_MS 3000
+#define NUM_SIMUL_TRANSFERS 32
+
+#define SAMPLE_RATE SR_KHZ(2400)
+
+static const int32_t hwopts[] = {
+ SR_CONF_CONN,
+};
+
+static const int32_t hwcaps[] = {
+ SR_CONF_LOGIC_ANALYZER,
+ SR_CONF_CONTINUOUS,
+ SR_CONF_CONN | SR_CONF_GET,
+ SR_CONF_SAMPLERATE | SR_CONF_GET,
+ SR_CONF_LIMIT_SAMPLES | SR_CONF_SET,
+};
+
+static const struct chan {
+ char *name;
+ int type;
+} chan_defs[] = {
+ {"CC1", SR_CHANNEL_LOGIC},
+ {"CC2", SR_CHANNEL_LOGIC},
+
+ {NULL, 0}
+};
+
+static GSList *scan(struct sr_dev_driver *di, GSList *options)
+{
+ struct drv_context *drvc;
+ struct dev_context *devc;
+ struct sr_dev_inst *sdi;
+ struct sr_usb_dev_inst *usb;
+ struct sr_channel *ch;
+ struct sr_config *src;
+ GSList *l, *devices, *conn_devices;
+ struct libusb_device_descriptor des;
+ libusb_device **devlist;
+ int ret, i, j;
+ const char *conn;
+ char connection_id[64];
+
+ drvc = di->context;
+
+ conn = NULL;
+ for (l = options; l; l = l->next) {
+ src = l->data;
+ switch (src->key) {
+ case SR_CONF_CONN:
+ conn = g_variant_get_string(src->data, NULL);
+ break;
+ }
+ }
+ if (conn)
+ conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
+ else
+ conn_devices = NULL;
+
+ /* Find all Twinkie devices */
+ devices = NULL;
+ libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
+ for (i = 0; devlist[i]; i++) {
+ if (conn) {
+ usb = NULL;
+ for (l = conn_devices; l; l = l->next) {
+ usb = l->data;
+ if (usb->bus == libusb_get_bus_number(devlist[i])
+ && usb->address == libusb_get_device_address(devlist[i]))
+ break;
+ }
+ if (!l)
+ /* This device matched none of the ones that
+ * matched the conn specification. */
+ continue;
+ }
+
+ if ((ret = libusb_get_device_descriptor(devlist[i], &des)) != 0) {
+ sr_warn("Failed to get device descriptor: %s.",
+ libusb_error_name(ret));
+ continue;
+ }
+
+ if (des.idVendor != TWINKIE_VID || des.idProduct != TWINKIE_PID)
+ continue;
+
+ usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
+
+ sdi = g_malloc0(sizeof(struct sr_dev_inst));
+ sdi->status = SR_ST_INITIALIZING;
+ sdi->vendor = g_strdup("Chromium");
+ sdi->model = g_strdup("Twinkie");
+ sdi->driver = di;
+ sdi->connection_id = g_strdup(connection_id);
+
+ for (j = 0; chan_defs[j].name; j++)
+ if (!(ch = sr_channel_new(sdi, j, chan_defs[j].type,
+ TRUE, chan_defs[j].name)))
+ return NULL;
+
+ if (!(devc = g_try_malloc0(sizeof(struct dev_context))))
+ return NULL;
+ sdi->priv = devc;
+ drvc->instances = g_slist_append(drvc->instances, sdi);
+ devices = g_slist_append(devices, sdi);
+
+ sr_dbg("Found a Twinkie dongle.");
+ sdi->status = SR_ST_INACTIVE;
+ sdi->inst_type = SR_INST_USB;
+ sdi->conn = sr_usb_dev_inst_new(
+ libusb_get_bus_number(devlist[i]),
+ libusb_get_device_address(devlist[i]), NULL);
+ }
+ libusb_free_device_list(devlist, 1);
+ g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);
+
+ return devices;
+}
+
+static int twinkie_dev_open(struct sr_dev_inst *sdi)
+{
+ struct sr_dev_driver *di;
+ libusb_device **devlist;
+ struct sr_usb_dev_inst *usb;
+ struct libusb_device_descriptor des;
+ struct drv_context *drvc;
+ int ret, i, device_count;
+ char connection_id[64];
+
+ di = sdi->driver;
+ drvc = di->context;
+ usb = sdi->conn;
+
+ if (sdi->status == SR_ST_ACTIVE)
+ /* Device is already in use. */
+ return SR_ERR;
+
+ device_count = libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
+ if (device_count < 0) {
+ sr_err("Failed to get device list: %s.",
+ libusb_error_name(device_count));
+ return SR_ERR;
+ }
+
+ for (i = 0; i < device_count; i++) {
+ if ((ret = libusb_get_device_descriptor(devlist[i], &des))) {
+ sr_err("Failed to get device descriptor: %s.",
+ libusb_error_name(ret));
+ continue;
+ }
+
+ if (des.idVendor != TWINKIE_VID || des.idProduct != TWINKIE_PID)
+ continue;
+
+ if ((sdi->status == SR_ST_INITIALIZING) ||
+ (sdi->status == SR_ST_INACTIVE)) {
+ /*
+ * Check device by its physical USB bus/port address.
+ */
+ usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
+ if (strcmp(sdi->connection_id, connection_id))
+ /* This is not the one. */
+ continue;
+ }
+
+ if (!(ret = libusb_open(devlist[i], &usb->devhdl))) {
+ if (usb->address == 0xff)
+ /*
+ * First time we touch this device after FW
+ * upload, so we don't know the address yet.
+ */
+ usb->address = libusb_get_device_address(devlist[i]);
+ } else {
+ sr_err("Failed to open device: %s.",
+ libusb_error_name(ret));
+ break;
+ }
+
+ ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
+ if (ret == LIBUSB_ERROR_BUSY) {
+ sr_err("Unable to claim USB interface. Another "
+ "program or driver has already claimed it.");
+ break;
+ } else if (ret == LIBUSB_ERROR_NO_DEVICE) {
+ sr_err("Device has been disconnected.");
+ break;
+ } else if (ret != 0) {
+ sr_err("Unable to claim interface: %s.",
+ libusb_error_name(ret));
+ break;
+ }
+
+ if ((ret = twinkie_init_device(sdi)) != SR_OK) {
+ sr_err("Failed to init device.");
+ break;
+ }
+
+ sdi->status = SR_ST_ACTIVE;
+ sr_info("Opened device %d.%d, interface %d.",
+ usb->bus, usb->address, USB_INTERFACE);
+
+ break;
+ }
+ libusb_free_device_list(devlist, 1);
+
+ if (sdi->status != SR_ST_ACTIVE) {
+ if (usb->devhdl) {
+ libusb_release_interface(usb->devhdl, USB_INTERFACE);
+ libusb_close(usb->devhdl);
+ usb->devhdl = NULL;
+ }
+ return SR_ERR;
+ }
+
+ return SR_OK;
+}
+
+static int dev_open(struct sr_dev_inst *sdi)
+{
+ int ret;
+
+ ret = twinkie_dev_open(sdi);
+ if (ret != SR_OK) {
+ sr_err("Unable to open device.");
+ return SR_ERR;
+ }
+
+ return SR_OK;
+}
+
+static int dev_close(struct sr_dev_inst *sdi)
+{
+ struct sr_usb_dev_inst *usb;
+
+ usb = sdi->conn;
+ if (usb->devhdl == NULL)
+ return SR_ERR;
+
+ sr_info("Closing device %d.%d interface %d.",
+ usb->bus, usb->address, USB_INTERFACE);
+ libusb_release_interface(usb->devhdl, USB_INTERFACE);
+ libusb_close(usb->devhdl);
+ usb->devhdl = NULL;
+ sdi->status = SR_ST_INACTIVE;
+
+ return SR_OK;
+}
+
+static int dev_clear(const struct sr_dev_driver *di)
+{
+ return std_dev_clear(di, NULL);
+}
+
+static int config_get(uint32_t key, GVariant **data,
+ const struct sr_dev_inst *sdi,
+ const struct sr_channel_group *cg)
+{
+ struct sr_usb_dev_inst *usb;
+ char str[128];
+ int ret;
+
+ (void)cg;
+
+ ret = SR_OK;
+ switch (key) {
+ case SR_CONF_CONN:
+ if (!sdi || !sdi->conn)
+ return SR_ERR_ARG;
+ usb = sdi->conn;
+ if (usb->address == 255)
+ /* Device still needs to re-enumerate after firmware
+ * upload, so we don't know its (future) address. */
+ return SR_ERR;
+ snprintf(str, 128, "%d.%d", usb->bus, usb->address);
+ *data = g_variant_new_string(str);
+ break;
+ case SR_CONF_SAMPLERATE:
+ *data = g_variant_new_uint64(SAMPLE_RATE);
+ break;
+ default:
+ return SR_ERR_NA;
+ }
+
+ return ret;
+}
+
+static int config_set(uint32_t key, GVariant *data,
+ const struct sr_dev_inst *sdi,
+ const struct sr_channel_group *cg)
+{
+ struct dev_context *devc;
+ int ret;
+
+ (void)cg;
+
+ if (sdi->status != SR_ST_ACTIVE)
+ return SR_ERR_DEV_CLOSED;
+
+ devc = sdi->priv;
+
+ ret = SR_OK;
+ switch (key) {
+ case SR_CONF_LIMIT_SAMPLES:
+ devc->limit_samples = g_variant_get_uint64(data);
+ break;
+ default:
+ ret = SR_ERR_NA;
+ }
+
+ return ret;
+}
+
+static int config_list(uint32_t key, GVariant **data,
+ const struct sr_dev_inst *sdi,
+ const struct sr_channel_group *cg)
+{
+ int ret;
+
+ (void)sdi;
+ (void)cg;
+
+ ret = SR_OK;
+ switch (key) {
+ case SR_CONF_SCAN_OPTIONS:
+ *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
+ hwopts, ARRAY_SIZE(hwopts), sizeof(int32_t));
+ break;
+ case SR_CONF_DEVICE_OPTIONS:
+ *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
+ hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
+ break;
+ default:
+ return SR_ERR_NA;
+ }
+
+ return ret;
+}
+
+static void abort_acquisition(struct dev_context *devc)
+{
+ int i;
+
+ devc->sent_samples = -1;
+
+ for (i = devc->num_transfers - 1; i >= 0; i--) {
+ if (devc->transfers[i])
+ libusb_cancel_transfer(devc->transfers[i]);
+ }
+}
+
+static int receive_data(int fd, int revents, void *cb_data)
+{
+ struct timeval tv;
+ struct dev_context *devc;
+ struct drv_context *drvc;
+ const struct sr_dev_inst *sdi;
+ struct sr_dev_driver *di;
+
+ (void)fd;
+ (void)revents;
+
+ sdi = cb_data;
+ di = sdi->driver;
+ drvc = di->context;
+ devc = sdi->priv;
+
+ tv.tv_sec = tv.tv_usec = 0;
+ libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
+
+ if (devc->sent_samples == -2) {
+ abort_acquisition(devc);
+ }
+
+ return TRUE;
+}
+
+static int dev_acquisition_start(const struct sr_dev_inst *sdi)
+{
+ struct sr_dev_driver *di = sdi->driver;
+ struct dev_context *devc;
+ struct drv_context *drvc;
+ struct sr_usb_dev_inst *usb;
+ struct libusb_transfer *transfer;
+ unsigned int i, timeout, num_transfers;
+ int ret;
+ unsigned char *buf;
+ size_t size, convsize;
+
+ if (sdi->status != SR_ST_ACTIVE)
+ return SR_ERR_DEV_CLOSED;
+
+ drvc = di->context;
+ devc = sdi->priv;
+ usb = sdi->conn;
+
+ devc->sent_samples = 0;
+ /* reset per-CC context */
+ memset(devc->cc, 0, sizeof(devc->cc));
+
+ timeout = 1000;
+ num_transfers = 10;
+ size = 10*1024;
+ convsize = size * 8 * 256 /* largest size : only rollbacks/no edges */;
+ devc->submitted_transfers = 0;
+
+ devc->convbuffer_size = convsize;
+ if (!(devc->convbuffer = g_try_malloc(convsize))) {
+ sr_err("Conversion buffer malloc failed.");
+ return SR_ERR_MALLOC;
+ }
+ memset(devc->convbuffer, 0, devc->convbuffer_size);
+
+ devc->transfers = g_try_malloc0(sizeof(*devc->transfers) * num_transfers);
+ if (!devc->transfers) {
+ sr_err("USB transfers malloc failed.");
+ g_free(devc->convbuffer);
+ return SR_ERR_MALLOC;
+ }
+
+ devc->num_transfers = num_transfers;
+ for (i = 0; i < num_transfers; i++) {
+ if (!(buf = g_try_malloc(size))) {
+ sr_err("USB transfer buffer malloc failed.");
+ if (devc->submitted_transfers)
+ abort_acquisition(devc);
+ else {
+ g_free(devc->transfers);
+ g_free(devc->convbuffer);
+ }
+ return SR_ERR_MALLOC;
+ }
+ transfer = libusb_alloc_transfer(0);
+ libusb_fill_bulk_transfer(transfer, usb->devhdl,
+ 3 | LIBUSB_ENDPOINT_IN, buf, size,
+ twinkie_receive_transfer, (void *)sdi, timeout);
+ if ((ret = libusb_submit_transfer(transfer)) != 0) {
+ sr_err("Failed to submit transfer: %s.",
+ libusb_error_name(ret));
+ libusb_free_transfer(transfer);
+ g_free(buf);
+ abort_acquisition(devc);
+ return SR_ERR;
+ }
+ devc->transfers[i] = transfer;
+ devc->submitted_transfers++;
+ }
+
+ devc->ctx = drvc->sr_ctx;
+
+ usb_source_add(sdi->session, devc->ctx, timeout, receive_data,
+ (void *)sdi);
+
+ /* Send header packet to the session bus. */
+ std_session_send_df_header(sdi);
+
+ if ((ret = twinkie_start_acquisition(sdi)) != SR_OK) {
+ abort_acquisition(devc);
+ return ret;
+ }
+
+ return SR_OK;
+}
+
+static int dev_acquisition_stop(struct sr_dev_inst *sdi)
+{
+ if (sdi->status != SR_ST_ACTIVE)
+ return SR_ERR_DEV_CLOSED;
+
+ abort_acquisition(sdi->priv);
+
+ return SR_OK;
+}
+
+static struct sr_dev_driver chromium_twinkie_driver_info = {
+ .name = "chromium-twinkie",
+ .longname = "Chromium Twinkie",
+ .api_version = 1,
+ .init = std_init,
+ .cleanup = std_cleanup,
+ .scan = scan,
+ .dev_list = std_dev_list,
+ .dev_clear = dev_clear,
+ .config_get = config_get,
+ .config_set = config_set,
+ .config_list = config_list,
+ .dev_open = dev_open,
+ .dev_close = dev_close,
+ .dev_acquisition_start = dev_acquisition_start,
+ .dev_acquisition_stop = dev_acquisition_stop,
+};
+SR_REGISTER_DEV_DRIVER(chromium_twinkie_driver_info);
--- /dev/null
+/*
+ * This file is part of the libsigrok project.
+ *
+ * Copyright 2014 Google, Inc
+ *
+ * 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 2 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 <config.h>
+#include <stdint.h>
+#include <string.h>
+#include <libusb.h>
+#include <stdio.h>
+#include <errno.h>
+#include <math.h>
+#include <libsigrok/libsigrok.h>
+#include "libsigrok-internal.h"
+#include "protocol.h"
+
+SR_PRIV int twinkie_start_acquisition(const struct sr_dev_inst *sdi)
+{
+ (void)sdi;
+
+ return SR_OK;
+}
+
+SR_PRIV int twinkie_init_device(const struct sr_dev_inst *sdi)
+{
+ (void)sdi;
+
+ return SR_OK;
+}
+
+static void finish_acquisition(struct sr_dev_inst *sdi)
+{
+ struct sr_datafeed_packet packet;
+ struct dev_context *devc = sdi->priv;
+
+ /* Terminate session. */
+ packet.type = SR_DF_END;
+ sr_session_send(sdi, &packet);
+
+ /* Remove fds from polling. */
+ usb_source_remove(sdi->session, devc->ctx);
+
+ devc->num_transfers = 0;
+ g_free(devc->transfers);
+ g_free(devc->convbuffer);
+}
+
+static void free_transfer(struct libusb_transfer *transfer)
+{
+ struct sr_dev_inst *sdi;
+ struct dev_context *devc;
+ unsigned int i;
+
+ sdi = transfer->user_data;
+ devc = sdi->priv;
+
+ g_free(transfer->buffer);
+ transfer->buffer = NULL;
+ libusb_free_transfer(transfer);
+
+ for (i = 0; i < devc->num_transfers; i++) {
+ if (devc->transfers[i] == transfer) {
+ devc->transfers[i] = NULL;
+ break;
+ }
+ }
+
+ devc->submitted_transfers--;
+ if (devc->submitted_transfers == 0)
+ finish_acquisition(sdi);
+}
+
+static void export_samples(const struct sr_dev_inst *sdi, size_t cnt)
+{
+ struct sr_datafeed_packet packet;
+ struct sr_datafeed_logic logic;
+ struct dev_context *devc = sdi->priv;
+
+ /* export the received data */
+ packet.type = SR_DF_LOGIC;
+ packet.payload = &logic;
+ if (devc->limit_samples &&
+ cnt > devc->limit_samples - devc->sent_samples)
+ cnt = devc->limit_samples - devc->sent_samples;
+ logic.length = cnt;
+ logic.unitsize = 1;
+ logic.data = devc->convbuffer;
+ sr_session_send(sdi, &packet);
+ devc->sent_samples += cnt;
+}
+
+static void expand_sample_data(const struct sr_dev_inst *sdi,
+ const uint8_t *src, size_t srccnt)
+{
+ struct dev_context *devc = sdi->priv;
+ int i, f;
+ size_t b;
+ size_t rdy_samples, left_samples;
+ int frames = srccnt / 64;
+
+ for (f = 0; f < frames; f++) {
+ int ch = (src[1] >> 4) & 3; /* samples channel number */
+ int bit = 1 << ch; /* channel bit mask */
+ struct cc_context *cc = devc->cc + ch;
+ uint8_t *dest = devc->convbuffer + cc->idx;
+
+ if (ch >= 2) /* only acquires CCx channels */
+ continue;
+
+ /* TODO: check timestamp, overflow, sequence number */
+
+ /* skip header, go to edges data */
+ src+=4;
+ for (i = 0; i < 60; i++,src++)
+ if (*src == cc->prev_src) {
+ cc->rollbacks++;
+ } else {
+ uint8_t diff = *src - cc->prev_src;
+ int fixup = cc->rollbacks && (((int)*src < (int)cc->prev_src) || (*src == 0xff));
+ size_t total = (fixup ? cc->rollbacks - 1 : cc->rollbacks) * 256 + diff;
+
+ if (total + cc->idx > devc->convbuffer_size) {
+ sr_warn("overflow %d+%zd/%zd\n",
+ cc->idx, total,
+ devc->convbuffer_size);
+ /* reset current decoding */
+ cc->rollbacks = 0;
+ break;
+ }
+
+ /* insert bits in the buffer */
+ if (cc->level)
+ for (b = 0 ; b < total ; b++, dest++)
+ *dest |= bit;
+ else
+ dest += total;
+ cc->idx += total;
+
+ /* flip level on the next edge */
+ cc->level = ~cc->level;
+
+ cc->rollbacks = 0;
+ cc->prev_src = *src;
+ }
+ /* expand repeated rollbacks */
+ if (cc->rollbacks > 1) {
+ size_t total = 256 * (cc->rollbacks - 1);
+ if (total + cc->idx > devc->convbuffer_size) {
+ sr_warn("overflow %d+%zd/%zd\n",
+ cc->idx, total, devc->convbuffer_size);
+ /* reset current decoding */
+ total = 0;
+ }
+ /* insert bits in the buffer */
+ if (cc->level)
+ for (b = 0 ; b < total ; b++, dest++)
+ *dest |= bit ;
+ cc->idx += total;
+ cc->rollbacks = 1;
+ }
+ }
+
+ /* samples ready to be pushed (with both channels) */
+ rdy_samples = MIN(devc->cc[0].idx, devc->cc[1].idx);
+ left_samples = MAX(devc->cc[0].idx, devc->cc[1].idx) - rdy_samples;
+ /* skip empty transfer */
+ if (rdy_samples == 0)
+ return;
+
+ export_samples(sdi, rdy_samples);
+
+ /* clean up what we have sent */
+ memmove(devc->convbuffer, devc->convbuffer + rdy_samples, left_samples);
+ memset(devc->convbuffer + left_samples, 0, rdy_samples);
+ devc->cc[0].idx -= rdy_samples;
+ devc->cc[1].idx -= rdy_samples;
+}
+
+SR_PRIV void twinkie_receive_transfer(struct libusb_transfer *transfer)
+{
+ gboolean packet_has_error = FALSE;
+ struct sr_dev_inst *sdi;
+ struct dev_context *devc;
+
+ sdi = transfer->user_data;
+ devc = sdi->priv;
+
+ /*
+ * If acquisition has already ended, just free any queued up
+ * transfer that come in.
+ */
+ if (devc->sent_samples < 0) {
+ free_transfer(transfer);
+ return;
+ }
+
+ if (transfer->status || transfer->actual_length)
+ sr_info("receive_transfer(): status %d received %d bytes.",
+ transfer->status, transfer->actual_length);
+
+ switch (transfer->status) {
+ case LIBUSB_TRANSFER_NO_DEVICE:
+ devc->sent_samples = -2;
+ free_transfer(transfer);
+ return;
+ case LIBUSB_TRANSFER_COMPLETED:
+ case LIBUSB_TRANSFER_TIMED_OUT: /* We may have received some data though. */
+ break;
+ default:
+ packet_has_error = TRUE;
+ break;
+ }
+
+ if (transfer->actual_length % 64) {
+ sr_err("Bad USB packet size.");
+ packet_has_error = TRUE;
+ }
+
+ if (transfer->actual_length == 0 || packet_has_error)
+ goto resubmit;
+
+ /* decode received edges */
+ expand_sample_data(sdi, transfer->buffer, transfer->actual_length);
+
+ if (devc->limit_samples &&
+ (uint64_t)devc->sent_samples >= devc->limit_samples) {
+ devc->sent_samples = -2;
+ free_transfer(transfer);
+ return;
+ }
+resubmit:
+ if (libusb_submit_transfer(transfer) != LIBUSB_SUCCESS)
+ free_transfer(transfer);
+}
projects / libsigrok.git / commitdiff