diff --git a/configure.ac b/configure.ac index 94f46558..ce067e32 100644 --- a/configure.ac +++ b/configure.ac @@ -457,6 +457,7 @@ fi AC_CHECK_HEADERS([fcntl.h sys/time.h termios.h]) # Checks for typedefs, structures, and compiler characteristics. +AC_C_BIGENDIAN AC_C_INLINE AC_TYPE_INT8_T AC_TYPE_INT16_T diff --git a/hardware/saleae-logic16/api.c b/hardware/saleae-logic16/api.c index 30be9b23..f49eca19 100644 --- a/hardware/saleae-logic16/api.c +++ b/hardware/saleae-logic16/api.c @@ -34,6 +34,7 @@ #define FX2_FIRMWARE FIRMWARE_DIR "/saleae-logic16-fx2.fw" #define MAX_RENUM_DELAY_MS 3000 +#define NUM_SIMUL_TRANSFERS 32 SR_PRIV struct sr_dev_driver saleae_logic16_driver_info; @@ -45,6 +46,23 @@ static const char *probe_names[NUM_PROBES + 1] = { NULL, }; +static const uint64_t samplerates[] = { + SR_KHZ(500), + SR_MHZ(1), + SR_MHZ(2), + SR_MHZ(4), + SR_MHZ(5), + SR_MHZ(8), + SR_MHZ(10), + SR_KHZ(12500), + SR_MHZ(16), + SR_MHZ(25), + SR_MHZ(32), + SR_MHZ(40), + SR_MHZ(80), + SR_MHZ(100), +}; + static int init(struct sr_context *sr_ctx) { return std_init(sr_ctx, di, LOG_PREFIX); @@ -357,7 +375,7 @@ static int dev_open(struct sr_dev_inst *sdi) if (devc->cur_samplerate == 0) { /* Samplerate hasn't been set; default to the slowest one. */ - devc->cur_samplerate = 500000; + devc->cur_samplerate = samplerates[0]; } return SR_OK; @@ -399,6 +417,7 @@ static int cleanup(void) static int config_get(int key, GVariant **data, const struct sr_dev_inst *sdi) { + struct dev_context *devc; int ret; (void)sdi; @@ -406,7 +425,12 @@ static int config_get(int key, GVariant **data, const struct sr_dev_inst *sdi) ret = SR_OK; switch (key) { - /* TODO */ + case SR_CONF_SAMPLERATE: + if (!sdi) + return SR_ERR; + devc = sdi->priv; + *data = g_variant_new_uint64(devc->cur_samplerate); + break; default: return SR_ERR_NA; } @@ -416,16 +440,22 @@ static int config_get(int key, GVariant **data, const struct sr_dev_inst *sdi) static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi) { + struct dev_context *devc; int ret; - (void)data; - if (sdi->status != SR_ST_ACTIVE) return SR_ERR_DEV_CLOSED; + devc = sdi->priv; + ret = SR_OK; switch (key) { - /* TODO */ + case SR_CONF_SAMPLERATE: + devc->cur_samplerate = g_variant_get_uint64(data); + break; + case SR_CONF_LIMIT_SAMPLES: + devc->limit_samples = g_variant_get_uint64(data); + break; default: ret = SR_ERR_NA; } @@ -435,14 +465,21 @@ static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi) static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi) { + GVariant *gvar; + GVariantBuilder gvb; int ret; (void)sdi; - (void)data; ret = SR_OK; switch (key) { - /* TODO */ + 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; default: return SR_ERR_NA; } @@ -450,31 +487,244 @@ static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi) return ret; } -static int dev_acquisition_start(const struct sr_dev_inst *sdi, - void *cb_data) +static void abort_acquisition(struct dev_context *devc) { - (void)sdi; - (void)cb_data; + 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 unsigned int bytes_per_ms(struct dev_context *devc) +{ + return devc->cur_samplerate * devc->num_channels / 8000; +} + +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 * bytes_per_ms(devc); + 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 * bytes_per_ms(devc) / 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 / bytes_per_ms(devc); + return timeout + timeout / 4; /* Leave a headroom of 25% percent. */ +} + +static int configure_probes(const struct sr_dev_inst *sdi) +{ + struct dev_context *devc; + struct sr_probe *probe; + GSList *l; + uint16_t probe_bit; + + devc = sdi->priv; + + devc->cur_channels = 0; + devc->num_channels = 0; + for (l = sdi->probes; l; l = l->next) { + probe = (struct sr_probe *)l->data; + if (probe->enabled == FALSE) + continue; + + probe_bit = 1 << (probe->index); + + devc->cur_channels |= probe_bit; + +#ifdef WORDS_BIGENDIAN + /* Output logic data should be stored in little endian + format. To speed things up during conversion, do the + switcharoo here instead. */ + + probe_bit = 1 << (probe->index ^ 8); +#endif + + devc->channel_masks[devc->num_channels ++] = probe_bit; + } + + return SR_OK; +} + +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; + + (void)fd; + (void)revents; + + sdi = cb_data; + drvc = di->priv; + devc = sdi->priv; + + tv.tv_sec = tv.tv_usec = 0; + libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv); + + if (devc->num_samples == -2) { + saleae_logic16_abort_acquisition(sdi); + abort_acquisition(devc); + } + + return TRUE; +} + +static int 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, convsize; if (sdi->status != SR_ST_ACTIVE) return SR_ERR_DEV_CLOSED; - /* TODO: configure hardware, reset acquisition state, set up - * callbacks and send header packet. */ + drvc = di->priv; + devc = sdi->priv; + usb = sdi->conn; + + /* Configures devc->cur_channels */ + 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; + devc->cur_channel = 0; + memset(devc->channel_data, 0, sizeof(devc->channel_data)); + + timeout = get_timeout(devc); + num_transfers = get_number_of_transfers(devc); + size = get_buffer_size(devc); + convsize = (size / devc->num_channels + 2) * 16; + devc->submitted_transfers = 0; + devc->usbfd = NULL; + + devc->convbuffer_size = convsize; + if (!(devc->convbuffer = g_try_malloc(convsize))) { + sr_err("Conversion buffer malloc failed."); + return SR_ERR_MALLOC; + } + + 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; + } + + if ((ret = saleae_logic16_setup_acquisition(sdi, devc->cur_samplerate, + devc->cur_channels)) != SR_OK) { + g_free(devc->transfers); + g_free(devc->convbuffer); + return ret; + } + + 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, + 2 | LIBUSB_ENDPOINT_IN, buf, size, + saleae_logic16_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++); + if (!(devc->usbfd = g_try_malloc(sizeof(struct libusb_pollfd) * (i + 1)))) { + abort_acquisition(devc); + free(lupfd); + return SR_ERR; + } + for (i = 0; lupfd[i]; i++) { + sr_source_add(lupfd[i]->fd, lupfd[i]->events, + timeout, receive_data, (void *)sdi); + devc->usbfd[i] = lupfd[i]->fd; + } + devc->usbfd[i] = -1; + free(lupfd); + + /* Send header packet to the session bus. */ + std_session_send_df_header(cb_data, LOG_PREFIX); + + if ((ret = saleae_logic16_start_acquisition(sdi)) != SR_OK) { + abort_acquisition(devc); + return ret; + } return SR_OK; } static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data) { + int ret; + (void)cb_data; if (sdi->status != SR_ST_ACTIVE) return SR_ERR_DEV_CLOSED; - /* TODO: stop acquisition. */ + ret = saleae_logic16_abort_acquisition(sdi); - return SR_OK; + abort_acquisition(sdi->priv); + + return ret; } SR_PRIV struct sr_dev_driver saleae_logic16_driver_info = { diff --git a/hardware/saleae-logic16/protocol.c b/hardware/saleae-logic16/protocol.c index d83dc48f..03808874 100644 --- a/hardware/saleae-logic16/protocol.c +++ b/hardware/saleae-logic16/protocol.c @@ -32,6 +32,16 @@ #define FPGA_FIRMWARE_18 FIRMWARE_DIR"/saleae-logic16-fpga-18.bitstream" #define FPGA_FIRMWARE_33 FIRMWARE_DIR"/saleae-logic16-fpga-33.bitstream" +#define MAX_SAMPLE_RATE SR_MHZ(100) +#define MAX_4CH_SAMPLE_RATE SR_MHZ(50) +#define MAX_7CH_SAMPLE_RATE SR_MHZ(40) +#define MAX_8CH_SAMPLE_RATE SR_MHZ(32) +#define MAX_10CH_SAMPLE_RATE SR_MHZ(25) +#define MAX_13CH_SAMPLE_RATE SR_MHZ(16) + +#define BASE_CLOCK_0_FREQ SR_MHZ(100) +#define BASE_CLOCK_1_FREQ SR_MHZ(160) + #define COMMAND_START_ACQUISITION 1 #define COMMAND_ABORT_ACQUISITION_ASYNC 2 #define COMMAND_WRITE_EEPROM 6 @@ -52,6 +62,8 @@ #define READ_EEPROM_COOKIE2 0x81 #define ABORT_ACQUISITION_SYNC_PATTERN 0x55 +#define MAX_EMPTY_TRANSFERS 64 + static void encrypt(uint8_t *dest, const uint8_t *src, uint8_t cnt) { @@ -384,15 +396,11 @@ static int upload_fpga_bitstream(const struct sr_dev_inst *sdi, if ((ret = configure_led(sdi)) != SR_OK) return ret; - /* XXX */ - if ((ret = configure_led(sdi)) != SR_OK) - return ret; - devc->cur_voltage_range = vrange; return SR_OK; } -SR_PRIV int saleae_logic16_abort_acquisition(const struct sr_dev_inst *sdi) +static int abort_acquisition_sync(const struct sr_dev_inst *sdi) { static const uint8_t command[2] = { COMMAND_ABORT_ACQUISITION_SYNC, @@ -414,6 +422,137 @@ SR_PRIV int saleae_logic16_abort_acquisition(const struct sr_dev_inst *sdi) return SR_OK; } +SR_PRIV int saleae_logic16_setup_acquisition(const struct sr_dev_inst *sdi, + uint64_t samplerate, + uint16_t channels) +{ + uint8_t clock_select, reg1, reg10; + uint64_t div; + int i, ret, nchan = 0; + + if (samplerate == 0 || samplerate > MAX_SAMPLE_RATE) { + sr_err("Unable to sample at %" PRIu64 "Hz.", samplerate); + return SR_ERR; + } + + if (BASE_CLOCK_0_FREQ % samplerate == 0 && + (div = BASE_CLOCK_0_FREQ / samplerate) <= 256) { + clock_select = 0; + } else if (BASE_CLOCK_1_FREQ % samplerate == 0 && + (div = BASE_CLOCK_1_FREQ / samplerate) <= 256) { + clock_select = 1; + } else { + sr_err("Unable to sample at %" PRIu64 "Hz.", samplerate); + return SR_ERR; + } + + for (i=0; i<16; i++) + if (channels & (1U<= 13 && samplerate > MAX_13CH_SAMPLE_RATE) || + (nchan >= 10 && samplerate > MAX_10CH_SAMPLE_RATE) || + (nchan >= 8 && samplerate > MAX_8CH_SAMPLE_RATE) || + (nchan >= 7 && samplerate > MAX_7CH_SAMPLE_RATE) || + (nchan >= 4 && samplerate > MAX_4CH_SAMPLE_RATE)) { + sr_err("Unable to sample at %" PRIu64 "Hz " + "with this many channels.", samplerate); + return SR_ERR; + } + + if ((ret = read_fpga_register(sdi, 1, ®1)) != SR_OK) + return ret; + + if (reg1 != 0x08) { + sr_dbg("Invalid state at acquisition setup: 0x%02x != 0x08", reg1); + return SR_ERR; + } + + if ((ret = write_fpga_register(sdi, 1, 0x40)) != SR_OK) + return ret; + + if ((ret = write_fpga_register(sdi, 10, clock_select)) != SR_OK) + return ret; + + if ((ret = write_fpga_register(sdi, 4, (uint8_t)(div-1))) != SR_OK) + return ret; + + if ((ret = write_fpga_register(sdi, 2, (uint8_t)(channels & 0xff))) != SR_OK) + return ret; + + if ((ret = write_fpga_register(sdi, 3, (uint8_t)(channels >> 8))) != SR_OK) + return ret; + + if ((ret = write_fpga_register(sdi, 1, 0x42)) != SR_OK) + return ret; + + if ((ret = write_fpga_register(sdi, 1, 0x40)) != SR_OK) + return ret; + + if ((ret = read_fpga_register(sdi, 1, ®1)) != SR_OK) + return ret; + + if (reg1 != 0x48) { + sr_dbg("Invalid state at acquisition setup: 0x%02x != 0x48", reg1); + return SR_ERR; + } + + if ((ret = read_fpga_register(sdi, 10, ®10)) != SR_OK) + return ret; + + if (reg10 != clock_select) { + sr_dbg("Invalid state at acquisition setup: 0x%02x != 0x%02x", + reg10, (unsigned)clock_select); + return SR_ERR; + } + + return SR_OK; +} + +SR_PRIV int saleae_logic16_start_acquisition(const struct sr_dev_inst *sdi) +{ + static const uint8_t command[1] = { + COMMAND_START_ACQUISITION, + }; + int ret; + + if ((ret = do_ep1_command(sdi, command, 1, NULL, 0)) != SR_OK) + return ret; + + return write_fpga_register(sdi, 1, 0x41); +} + +SR_PRIV int saleae_logic16_abort_acquisition(const struct sr_dev_inst *sdi) +{ + static const uint8_t command[1] = { + COMMAND_ABORT_ACQUISITION_ASYNC, + }; + int ret; + uint8_t reg1, reg8, reg9; + + if ((ret = do_ep1_command(sdi, command, 1, NULL, 0)) != SR_OK) + return ret; + + if ((ret = write_fpga_register(sdi, 1, 0x00)) != SR_OK) + return ret; + + if ((ret = read_fpga_register(sdi, 1, ®1)) != SR_OK) + return ret; + + if (reg1 != 0x08) { + sr_dbg("Invalid state at acquisition stop: 0x%02x != 0x08", reg1); + return SR_ERR; + } + + if ((ret = read_fpga_register(sdi, 8, ®8)) != SR_OK) + return ret; + + if ((ret = read_fpga_register(sdi, 9, ®9)) != SR_OK) + return ret; + + return SR_OK; +} + SR_PRIV int saleae_logic16_init_device(const struct sr_dev_inst *sdi) { struct dev_context *devc; @@ -423,7 +562,7 @@ SR_PRIV int saleae_logic16_init_device(const struct sr_dev_inst *sdi) devc->cur_voltage_range = VOLTAGE_RANGE_UNKNOWN; - if ((ret = saleae_logic16_abort_acquisition(sdi)) != SR_OK) + if ((ret = abort_acquisition_sync(sdi)) != SR_OK) return ret; if ((ret = read_eeprom(sdi, 8, 8, devc->eeprom_data)) != SR_OK) @@ -435,22 +574,188 @@ SR_PRIV int saleae_logic16_init_device(const struct sr_dev_inst *sdi) return SR_OK; } -SR_PRIV int saleae_logic16_receive_data(int fd, int revents, void *cb_data) +static void finish_acquisition(struct dev_context *devc) { - (void)fd; + struct sr_datafeed_packet packet; + int i; - const struct sr_dev_inst *sdi; - struct dev_context *devc; + /* Terminate session. */ + packet.type = SR_DF_END; + sr_session_send(devc->cb_data, &packet); - if (!(sdi = cb_data)) - return TRUE; - - if (!(devc = sdi->priv)) - return TRUE; - - if (revents == G_IO_IN) { - /* TODO */ + /* Remove fds from polling. */ + if (devc->usbfd != NULL) { + for (i = 0; devc->usbfd[i] != -1; i++) + sr_source_remove(devc->usbfd[i]); + g_free(devc->usbfd); } - return TRUE; + devc->num_transfers = 0; + g_free(devc->transfers); + g_free(devc->convbuffer); +} + +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 size_t convert_sample_data(struct dev_context *devc, + uint8_t *dest, size_t destcnt, + const uint8_t *src, size_t srccnt) +{ + uint16_t *channel_data; + int i, cur_channel; + size_t ret = 0; + + srccnt /= 2; + + channel_data = devc->channel_data; + cur_channel = devc->cur_channel; + + while(srccnt--) { + uint16_t sample, channel_mask; + + sample = src[0] | (src[1] << 8); + src += 2; + + channel_mask = devc->channel_masks[cur_channel]; + + for (i=15; i>=0; --i, sample >>= 1) + if (sample & 1) + channel_data[i] |= channel_mask; + + if (++cur_channel == devc->num_channels) { + cur_channel = 0; + if (destcnt < 16*2) { + sr_err("Conversion buffer too small!"); + break; + } + memcpy(dest, channel_data, 16*2); + memset(channel_data, 0, 16*2); + dest += 16*2; + ret += 16*2; + destcnt -= 16*2; + } + } + + devc->cur_channel = cur_channel; + + return ret; +} + +SR_PRIV void saleae_logic16_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; + size_t converted_length; + + devc = transfer->user_data; + + /* + * If acquisition has already ended, just free any queued up + * transfer that come in. + */ + if (devc->num_samples < 0) { + free_transfer(transfer); + return; + } + + sr_info("receive_transfer(): status %d received %d bytes.", + transfer->status, transfer->actual_length); + + switch (transfer->status) { + case LIBUSB_TRANSFER_NO_DEVICE: + devc->num_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 & 1) { + sr_err("Got an odd number of bytes from the device. This should not happen."); + /* Bail out right away */ + packet_has_error = TRUE; + devc->empty_transfer_count = MAX_EMPTY_TRANSFERS; + } + + 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. + */ + devc->num_samples = -2; + free_transfer(transfer); + } else { + resubmit_transfer(transfer); + } + return; + } else { + devc->empty_transfer_count = 0; + } + + converted_length = + convert_sample_data(devc, + devc->convbuffer, devc->convbuffer_size, + transfer->buffer, transfer->actual_length); + + if (converted_length > 0) { + /* Send the incoming transfer to the session bus. */ + packet.type = SR_DF_LOGIC; + packet.payload = &logic; + logic.length = converted_length; + logic.unitsize = 2; + logic.data = devc->convbuffer; + sr_session_send(devc->cb_data, &packet); + + devc->num_samples += converted_length / 2; + if (devc->limit_samples && + (uint64_t)devc->num_samples > devc->limit_samples) { + devc->num_samples = -2; + free_transfer(transfer); + return; + } + } + + resubmit_transfer(transfer); } diff --git a/hardware/saleae-logic16/protocol.h b/hardware/saleae-logic16/protocol.h index d7ddb9a4..80b20f95 100644 --- a/hardware/saleae-logic16/protocol.h +++ b/hardware/saleae-logic16/protocol.h @@ -53,17 +53,41 @@ struct dev_context { /** The currently configured samplerate of the device. */ uint64_t cur_samplerate; + /** Maximum number of samples to capture, if nonzero */ + uint64_t limit_samples; + /** The currently configured input voltage of the device */ enum voltage_range cur_voltage_range; + /** Channels to use */ + uint16_t cur_channels; + /* * EEPROM data from address 8 */ uint8_t eeprom_data[8]; + + int64_t num_samples; + int submitted_transfers; + int empty_transfer_count; + int num_channels, cur_channel; + uint16_t channel_masks[16]; + uint16_t channel_data[16]; + uint8_t *convbuffer; + size_t convbuffer_size; + + void *cb_data; + unsigned int num_transfers; + struct libusb_transfer **transfers; + int *usbfd; }; +SR_PRIV int saleae_logic16_setup_acquisition(const struct sr_dev_inst *sdi, + uint64_t samplerate, + uint16_t channels); +SR_PRIV int saleae_logic16_start_acquisition(const struct sr_dev_inst *sdi); SR_PRIV int saleae_logic16_abort_acquisition(const struct sr_dev_inst *sdi); SR_PRIV int saleae_logic16_init_device(const struct sr_dev_inst *sdi); -SR_PRIV int saleae_logic16_receive_data(int fd, int revents, void *cb_data); +SR_PRIV void saleae_logic16_receive_transfer(struct libusb_transfer *transfer); #endif