/* * This file is part of the sigrok project. * * Copyright (C) 2013 Bert Vermeulen * Copyright (C) 2012 Joel Holdsworth * * 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 . */ #include #include #include #include #include #include "libsigrok.h" #include "libsigrok-internal.h" #include "fx2lafw.h" #include "command.h" static const struct fx2lafw_profile supported_fx2[] = { /* * CWAV USBee AX * EE Electronics ESLA201A * ARMFLY AX-Pro */ { 0x08a9, 0x0014, "CWAV", "USBee AX", NULL, FIRMWARE_DIR "/fx2lafw-cwav-usbeeax.fw", 0 }, /* * CWAV USBee DX * XZL-Studio DX */ { 0x08a9, 0x0015, "CWAV", "USBee DX", NULL, FIRMWARE_DIR "/fx2lafw-cwav-usbeedx.fw", DEV_CAPS_16BIT }, /* * CWAV USBee SX */ { 0x08a9, 0x0009, "CWAV", "USBee SX", NULL, FIRMWARE_DIR "/fx2lafw-cwav-usbeesx.fw", 0 }, /* * Saleae Logic * EE Electronics ESLA100 * Robomotic MiniLogic * Robomotic BugLogic 3 */ { 0x0925, 0x3881, "Saleae", "Logic", NULL, FIRMWARE_DIR "/fx2lafw-saleae-logic.fw", 0 }, /* * Default Cypress FX2 without EEPROM, e.g.: * Lcsoft Mini Board * Braintechnology USB Interface V2.x */ { 0x04B4, 0x8613, "Cypress", "FX2", NULL, FIRMWARE_DIR "/fx2lafw-cypress-fx2.fw", DEV_CAPS_16BIT }, /* * Braintechnology USB-LPS */ { 0x16d0, 0x0498, "Braintechnology", "USB-LPS", NULL, FIRMWARE_DIR "/fx2lafw-braintechnology-usb-lps.fw", DEV_CAPS_16BIT }, { 0, 0, 0, 0, 0, 0, 0 } }; static const int32_t hwcaps[] = { SR_CONF_LOGIC_ANALYZER, SR_CONF_TRIGGER_TYPE, SR_CONF_SAMPLERATE, /* These are really implemented in the driver, not the hardware. */ SR_CONF_LIMIT_SAMPLES, SR_CONF_CONTINUOUS, }; static const char *probe_names[] = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15", NULL, }; static const uint64_t samplerates[] = { SR_KHZ(20), SR_KHZ(25), SR_KHZ(50), SR_KHZ(100), SR_KHZ(200), SR_KHZ(250), SR_KHZ(500), SR_MHZ(1), SR_MHZ(2), SR_MHZ(3), SR_MHZ(4), SR_MHZ(6), SR_MHZ(8), SR_MHZ(12), SR_MHZ(16), SR_MHZ(24), }; SR_PRIV struct sr_dev_driver fx2lafw_driver_info; static struct sr_dev_driver *di = &fx2lafw_driver_info; static int hw_dev_close(struct sr_dev_inst *sdi); static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data); /** * Check the USB configuration to determine if this is an fx2lafw device. * * @return TRUE if the device's configuration profile match fx2lafw * configuration, FALSE otherwise. */ static gboolean check_conf_profile(libusb_device *dev) { struct libusb_device_descriptor des; struct libusb_device_handle *hdl; gboolean ret; unsigned char strdesc[64]; hdl = NULL; ret = FALSE; while (!ret) { /* Assume the FW has not been loaded, unless proven wrong. */ if (libusb_get_device_descriptor(dev, &des) != 0) break; if (libusb_open(dev, &hdl) != 0) break; if (libusb_get_string_descriptor_ascii(hdl, des.iManufacturer, strdesc, sizeof(strdesc)) < 0) break; if (strncmp((const char *)strdesc, "sigrok", 6)) break; if (libusb_get_string_descriptor_ascii(hdl, des.iProduct, strdesc, sizeof(strdesc)) < 0) break; if (strncmp((const char *)strdesc, "fx2lafw", 7)) break; /* If we made it here, it must be an fx2lafw. */ ret = TRUE; } if (hdl) libusb_close(hdl); return ret; } static int fx2lafw_dev_open(struct sr_dev_inst *sdi) { libusb_device **devlist; struct sr_usb_dev_inst *usb; struct libusb_device_descriptor des; struct dev_context *devc; struct drv_context *drvc; struct version_info vi; int ret, skip, i, device_count; uint8_t revid; drvc = di->priv; devc = sdi->priv; usb = sdi->conn; if (sdi->status == SR_ST_ACTIVE) /* Device is already in use. */ return SR_ERR; skip = 0; 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 != devc->profile->vid || des.idProduct != devc->profile->pid) continue; if (sdi->status == SR_ST_INITIALIZING) { if (skip != sdi->index) { /* Skip devices of this type that aren't the one we want. */ skip += 1; continue; } } else if (sdi->status == SR_ST_INACTIVE) { /* * This device is fully enumerated, so we need to find * this device by vendor, product, bus and address. */ if (libusb_get_bus_number(devlist[i]) != usb->bus || libusb_get_device_address(devlist[i]) != usb->address) /* 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 = command_get_fw_version(usb->devhdl, &vi); if (ret != SR_OK) { sr_err("Failed to get firmware version."); break; } ret = command_get_revid_version(usb->devhdl, &revid); if (ret != SR_OK) { sr_err("Failed to get REVID."); break; } /* * Changes in major version mean incompatible/API changes, so * bail out if we encounter an incompatible version. * Different minor versions are OK, they should be compatible. */ if (vi.major != FX2LAFW_REQUIRED_VERSION_MAJOR) { sr_err("Expected firmware version %d.x, " "got %d.%d.", FX2LAFW_REQUIRED_VERSION_MAJOR, vi.major, vi.minor); break; } sdi->status = SR_ST_ACTIVE; sr_info("Opened device %d on %d.%d, " "interface %d, firmware %d.%d.", sdi->index, usb->bus, usb->address, USB_INTERFACE, vi.major, vi.minor); sr_info("Detected REVID=%d, it's a Cypress CY7C68013%s.", revid, (revid != 1) ? " (FX2)" : "A (FX2LP)"); break; } libusb_free_device_list(devlist, 1); if (sdi->status != SR_ST_ACTIVE) return SR_ERR; return SR_OK; } static int configure_probes(const struct sr_dev_inst *sdi) { struct dev_context *devc; struct sr_probe *probe; GSList *l; int probe_bit, stage, i; char *tc; devc = sdi->priv; for (i = 0; i < NUM_TRIGGER_STAGES; i++) { devc->trigger_mask[i] = 0; devc->trigger_value[i] = 0; } stage = -1; for (l = sdi->probes; l; l = l->next) { probe = (struct sr_probe *)l->data; if (probe->enabled == FALSE) continue; if (probe->index > 7) devc->sample_wide = TRUE; probe_bit = 1 << (probe->index); if (!(probe->trigger)) continue; stage = 0; for (tc = probe->trigger; *tc; tc++) { devc->trigger_mask[stage] |= probe_bit; if (*tc == '1') devc->trigger_value[stage] |= probe_bit; stage++; if (stage > NUM_TRIGGER_STAGES) return SR_ERR; } } if (stage == -1) /* * We didn't configure any triggers, make sure acquisition * doesn't wait for any. */ devc->trigger_stage = TRIGGER_FIRED; else devc->trigger_stage = 0; return SR_OK; } static struct dev_context *fx2lafw_dev_new(void) { struct dev_context *devc; if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) { sr_err("Device context malloc failed."); return NULL; } devc->trigger_stage = TRIGGER_FIRED; return devc; } static int clear_instances(void) { return std_dev_clear(di, NULL); } static int hw_init(struct sr_context *sr_ctx) { return std_hw_init(sr_ctx, di, DRIVER_LOG_DOMAIN); } static GSList *hw_scan(GSList *options) { struct drv_context *drvc; struct dev_context *devc; struct sr_dev_inst *sdi; struct sr_usb_dev_inst *usb; struct sr_probe *probe; struct sr_config *src; const struct fx2lafw_profile *prof; GSList *l, *devices, *conn_devices; struct libusb_device_descriptor des; libusb_device **devlist; int devcnt, num_logic_probes, ret, i, j; const char *conn; (void)options; drvc = di->priv; /* This scan always invalidates any previous scans. */ clear_instances(); 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 fx2lafw compatible devices and upload firmware to them. */ 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; } prof = NULL; for (j = 0; supported_fx2[j].vid; j++) { if (des.idVendor == supported_fx2[j].vid && des.idProduct == supported_fx2[j].pid) { prof = &supported_fx2[j]; } } /* Skip if the device was not found. */ if (!prof) continue; devcnt = g_slist_length(drvc->instances); sdi = sr_dev_inst_new(devcnt, SR_ST_INITIALIZING, prof->vendor, prof->model, prof->model_version); if (!sdi) return NULL; sdi->driver = di; /* Fill in probelist according to this device's profile. */ num_logic_probes = prof->dev_caps & DEV_CAPS_16BIT ? 16 : 8; for (j = 0; j < num_logic_probes; j++) { if (!(probe = sr_probe_new(j, SR_PROBE_LOGIC, TRUE, probe_names[j]))) return NULL; sdi->probes = g_slist_append(sdi->probes, probe); } devc = fx2lafw_dev_new(); devc->profile = prof; sdi->priv = devc; drvc->instances = g_slist_append(drvc->instances, sdi); devices = g_slist_append(devices, sdi); if (check_conf_profile(devlist[i])) { /* Already has the firmware, so fix the new address. */ sr_dbg("Found an fx2lafw device."); 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); } else { if (ezusb_upload_firmware(devlist[i], USB_CONFIGURATION, prof->firmware) == SR_OK) /* Store when this device's FW was updated. */ devc->fw_updated = g_get_monotonic_time(); else sr_err("Firmware upload failed for " "device %d.", devcnt); sdi->inst_type = SR_INST_USB; sdi->conn = sr_usb_dev_inst_new (libusb_get_bus_number(devlist[i]), 0xff, NULL); } } libusb_free_device_list(devlist, 1); return devices; } static GSList *hw_dev_list(void) { return ((struct drv_context *)(di->priv))->instances; } static int hw_dev_open(struct sr_dev_inst *sdi) { struct sr_usb_dev_inst *usb; struct dev_context *devc; int ret; int64_t timediff_us, timediff_ms; devc = sdi->priv; usb = sdi->conn; /* * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS * milliseconds for the FX2 to renumerate. */ ret = SR_ERR; if (devc->fw_updated > 0) { sr_info("Waiting for device to reset."); /* Takes >= 300ms for the FX2 to be gone from the USB bus. */ g_usleep(300 * 1000); timediff_ms = 0; while (timediff_ms < MAX_RENUM_DELAY_MS) { if ((ret = fx2lafw_dev_open(sdi)) == SR_OK) break; g_usleep(100 * 1000); timediff_us = g_get_monotonic_time() - devc->fw_updated; timediff_ms = timediff_us / 1000; sr_spew("Waited %" PRIi64 "ms.", timediff_ms); } if (ret != SR_OK) { sr_err("Device failed to renumerate."); return SR_ERR; } sr_info("Device came back after %" PRIi64 "ms.", timediff_ms); } else { sr_info("Firmware upload was not needed."); ret = fx2lafw_dev_open(sdi); } if (ret != SR_OK) { sr_err("Unable to open device."); return SR_ERR; } ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE); if (ret != 0) { switch(ret) { case LIBUSB_ERROR_BUSY: sr_err("Unable to claim USB interface. Another " "program or driver has already claimed it."); break; case LIBUSB_ERROR_NO_DEVICE: sr_err("Device has been disconnected."); break; default: sr_err("Unable to claim interface: %s.", libusb_error_name(ret)); break; } return SR_ERR; } if (devc->cur_samplerate == 0) { /* Samplerate hasn't been set; default to the slowest one. */ devc->cur_samplerate = samplerates[0]; } return SR_OK; } static int hw_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("fx2lafw: Closing device %d on %d.%d interface %d.", sdi->index, 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 hw_cleanup(void) { struct drv_context *drvc; int ret; if (!(drvc = di->priv)) return SR_OK; ret = clear_instances(); g_free(drvc); di->priv = NULL; return ret; } static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi) { struct dev_context *devc; switch (id) { case SR_CONF_SAMPLERATE: if (sdi) { devc = sdi->priv; *data = g_variant_new_uint64(devc->cur_samplerate); } else return SR_ERR; break; default: return SR_ERR_NA; } return SR_OK; } static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi) { struct dev_context *devc; int ret; devc = sdi->priv; if (id == SR_CONF_SAMPLERATE) { devc->cur_samplerate = g_variant_get_uint64(data); ret = SR_OK; } else if (id == SR_CONF_LIMIT_SAMPLES) { devc->limit_samples = g_variant_get_uint64(data); ret = SR_OK; } else { ret = SR_ERR_NA; } return ret; } static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi) { GVariant *gvar; GVariantBuilder gvb; (void)sdi; switch (key) { case SR_CONF_DEVICE_OPTIONS: *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32, hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t)); break; case SR_CONF_SAMPLERATE: g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}")); gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), samplerates, ARRAY_SIZE(samplerates), sizeof(uint64_t)); g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar); *data = g_variant_builder_end(&gvb); break; case SR_CONF_TRIGGER_TYPE: *data = g_variant_new_string(TRIGGER_TYPE); break; default: return SR_ERR_NA; } return SR_OK; } static int receive_data(int fd, int revents, void *cb_data) { struct timeval tv; struct drv_context *drvc; (void)fd; (void)revents; (void)cb_data; drvc = di->priv; tv.tv_sec = tv.tv_usec = 0; libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv); return TRUE; } static void abort_acquisition(struct dev_context *devc) { int i; devc->num_samples = -1; for (i = devc->num_transfers - 1; i >= 0; i--) { if (devc->transfers[i]) libusb_cancel_transfer(devc->transfers[i]); } } static void finish_acquisition(struct dev_context *devc) { struct sr_datafeed_packet packet; struct drv_context *drvc = di->priv; const struct libusb_pollfd **lupfd; int i; /* Terminate session. */ packet.type = SR_DF_END; sr_session_send(devc->cb_data, &packet); /* Remove fds from polling. */ lupfd = libusb_get_pollfds(drvc->sr_ctx->libusb_ctx); for (i = 0; lupfd[i]; i++) sr_source_remove(lupfd[i]->fd); free(lupfd); /* NOT g_free()! */ devc->num_transfers = 0; g_free(devc->transfers); } static void free_transfer(struct libusb_transfer *transfer) { struct dev_context *devc; unsigned int i; devc = transfer->user_data; 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(devc); } static void resubmit_transfer(struct libusb_transfer *transfer) { int ret; if ((ret = libusb_submit_transfer(transfer)) == LIBUSB_SUCCESS) return; free_transfer(transfer); /* TODO: Stop session? */ sr_err("%s: %s", __func__, libusb_error_name(ret)); } static void receive_transfer(struct libusb_transfer *transfer) { gboolean packet_has_error = FALSE; struct sr_datafeed_packet packet; struct sr_datafeed_logic logic; struct dev_context *devc; int trigger_offset, i, sample_width, cur_sample_count; int trigger_offset_bytes; uint8_t *cur_buf; devc = transfer->user_data; /* * If acquisition has already ended, just free any queued up * transfer that come in. */ if (devc->num_samples == -1) { free_transfer(transfer); return; } sr_info("receive_transfer(): status %d received %d bytes.", transfer->status, transfer->actual_length); /* Save incoming transfer before reusing the transfer struct. */ cur_buf = transfer->buffer; sample_width = devc->sample_wide ? 2 : 1; cur_sample_count = transfer->actual_length / sample_width; switch (transfer->status) { case LIBUSB_TRANSFER_NO_DEVICE: abort_acquisition(devc); 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 == 0 || packet_has_error) { devc->empty_transfer_count++; if (devc->empty_transfer_count > MAX_EMPTY_TRANSFERS) { /* * The FX2 gave up. End the acquisition, the frontend * will work out that the samplecount is short. */ abort_acquisition(devc); free_transfer(transfer); } else { resubmit_transfer(transfer); } return; } else { devc->empty_transfer_count = 0; } trigger_offset = 0; if (devc->trigger_stage >= 0) { for (i = 0; i < cur_sample_count; i++) { const uint16_t cur_sample = devc->sample_wide ? *((const uint16_t*)cur_buf + i) : *((const uint8_t*)cur_buf + i); if ((cur_sample & devc->trigger_mask[devc->trigger_stage]) == devc->trigger_value[devc->trigger_stage]) { /* Match on this trigger stage. */ devc->trigger_buffer[devc->trigger_stage] = cur_sample; devc->trigger_stage++; if (devc->trigger_stage == NUM_TRIGGER_STAGES || devc->trigger_mask[devc->trigger_stage] == 0) { /* Match on all trigger stages, we're done. */ trigger_offset = i + 1; /* * TODO: Send pre-trigger buffer to session bus. * Tell the frontend we hit the trigger here. */ packet.type = SR_DF_TRIGGER; packet.payload = NULL; sr_session_send(devc->cb_data, &packet); /* * Send the samples that triggered it, * since we're skipping past them. */ packet.type = SR_DF_LOGIC; packet.payload = &logic; logic.unitsize = sizeof(*devc->trigger_buffer); logic.length = devc->trigger_stage * logic.unitsize; logic.data = devc->trigger_buffer; sr_session_send(devc->cb_data, &packet); devc->trigger_stage = TRIGGER_FIRED; break; } } else if (devc->trigger_stage > 0) { /* * We had a match before, but not in the next sample. However, we may * have a match on this stage in the next bit -- trigger on 0001 will * fail on seeing 00001, so we need to go back to stage 0 -- but at * the next sample from the one that matched originally, which the * counter increment at the end of the loop takes care of. */ i -= devc->trigger_stage; if (i < -1) i = -1; /* Oops, went back past this buffer. */ /* Reset trigger stage. */ devc->trigger_stage = 0; } } } if (devc->trigger_stage == TRIGGER_FIRED) { /* Send the incoming transfer to the session bus. */ trigger_offset_bytes = trigger_offset * sample_width; packet.type = SR_DF_LOGIC; packet.payload = &logic; logic.length = transfer->actual_length - trigger_offset_bytes; logic.unitsize = sample_width; logic.data = cur_buf + trigger_offset_bytes; sr_session_send(devc->cb_data, &packet); devc->num_samples += cur_sample_count; if (devc->limit_samples && (unsigned int)devc->num_samples > devc->limit_samples) { abort_acquisition(devc); free_transfer(transfer); return; } } else { /* * TODO: Buffer pre-trigger data in capture * ratio-sized buffer. */ } resubmit_transfer(transfer); } static unsigned int to_bytes_per_ms(unsigned int samplerate) { return samplerate / 1000; } static size_t get_buffer_size(struct dev_context *devc) { size_t s; /* * The buffer should be large enough to hold 10ms of data and * a multiple of 512. */ s = 10 * to_bytes_per_ms(devc->cur_samplerate); return (s + 511) & ~511; } static unsigned int get_number_of_transfers(struct dev_context *devc) { unsigned int n; /* Total buffer size should be able to hold about 500ms of data. */ n = 500 * to_bytes_per_ms(devc->cur_samplerate) / get_buffer_size(devc); if (n > NUM_SIMUL_TRANSFERS) return NUM_SIMUL_TRANSFERS; return n; } static unsigned int get_timeout(struct dev_context *devc) { size_t total_size; unsigned int timeout; total_size = get_buffer_size(devc) * get_number_of_transfers(devc); timeout = total_size / to_bytes_per_ms(devc->cur_samplerate); return timeout + timeout / 4; /* Leave a headroom of 25% percent. */ } static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data) { struct dev_context *devc; struct drv_context *drvc; struct sr_usb_dev_inst *usb; struct libusb_transfer *transfer; const struct libusb_pollfd **lupfd; unsigned int i, timeout, num_transfers; int ret; unsigned char *buf; size_t size; drvc = di->priv; devc = sdi->priv; usb = sdi->conn; if (devc->submitted_transfers != 0) return SR_ERR; if (configure_probes(sdi) != SR_OK) { sr_err("Failed to configure probes."); return SR_ERR; } devc->cb_data = cb_data; devc->num_samples = 0; devc->empty_transfer_count = 0; timeout = get_timeout(devc); num_transfers = get_number_of_transfers(devc); size = get_buffer_size(devc); devc->transfers = g_try_malloc0(sizeof(*devc->transfers) * num_transfers); if (!devc->transfers) { sr_err("USB transfers malloc failed."); 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."); return SR_ERR_MALLOC; } transfer = libusb_alloc_transfer(0); libusb_fill_bulk_transfer(transfer, usb->devhdl, 2 | LIBUSB_ENDPOINT_IN, buf, size, receive_transfer, devc, 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++; } lupfd = libusb_get_pollfds(drvc->sr_ctx->libusb_ctx); for (i = 0; lupfd[i]; i++) sr_source_add(lupfd[i]->fd, lupfd[i]->events, timeout, receive_data, NULL); free(lupfd); /* NOT g_free()! */ /* Send header packet to the session bus. */ std_session_send_df_header(cb_data, DRIVER_LOG_DOMAIN); if ((ret = command_start_acquisition (usb->devhdl, devc->cur_samplerate, devc->sample_wide)) != SR_OK) { abort_acquisition(devc); return ret; } return SR_OK; } /* TODO: This stops acquisition on ALL devices, ignoring dev_index. */ static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data) { (void)cb_data; abort_acquisition(sdi->priv); return SR_OK; } SR_PRIV struct sr_dev_driver fx2lafw_driver_info = { .name = "fx2lafw", .longname = "fx2lafw (generic driver for FX2 based LAs)", .api_version = 1, .init = hw_init, .cleanup = hw_cleanup, .scan = hw_scan, .dev_list = hw_dev_list, .dev_clear = clear_instances, .config_get = config_get, .config_set = config_set, .config_list = config_list, .dev_open = hw_dev_open, .dev_close = hw_dev_close, .dev_acquisition_start = hw_dev_acquisition_start, .dev_acquisition_stop = hw_dev_acquisition_stop, .priv = NULL, };