+/*
+ * This file is part of the sigrok project.
+ *
+ * Copyright (C) 2010 Bert Vermeulen <bert@biot.com>
+ *
+ * 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 <stdio.h>
+#include <stdlib.h>
+#include <sys/time.h>
+#include <inttypes.h>
+#include <glib.h>
+#include <libusb.h>
+#include "config.h"
+#include "sigrok.h"
+
+#define USB_VENDOR 0x0925
+#define USB_PRODUCT 0x3881
+#define USB_VENDOR_NAME "Saleae"
+#define USB_MODEL_NAME "Logic"
+#define USB_MODEL_VERSION ""
+
+#define USB_INTERFACE 0
+#define USB_CONFIGURATION 1
+#define NUM_PROBES 8
+#define NUM_TRIGGER_STAGES 4
+#define TRIGGER_TYPES "01"
+#define FIRMWARE FIRMWARE_DIR "/saleae-logic.firmware"
+
+/* delay in ms */
+#define FIRMWARE_RENUM_DELAY 2000
+#define NUM_SIMUL_TRANSFERS 10
+#define MAX_EMPTY_TRANSFERS NUM_SIMUL_TRANSFERS * 2
+
+/* software trigger implementation: positive values indicate trigger stage */
+#define TRIGGER_FIRED -1
+
+
+/* there is only one model Saleae Logic, and this is what it supports */
+static int capabilities[] = {
+ HWCAP_LOGIC_ANALYZER,
+ HWCAP_SAMPLERATE,
+
+ /* these are really implemented in the driver, not the hardware */
+ HWCAP_LIMIT_SAMPLES,
+ 0
+};
+
+/* list of struct sigrok_device_instance, maintained by opendev() and closedev() */
+static GSList *device_instances = NULL;
+
+/* since we can't keep track of a Saleae Logic device after upgrading the
+ * firmware -- it re-enumerates into a different device address after the
+ * upgrade -- this is like a global lock. No device will open until a proper
+ * delay after the last device was upgraded.
+ */
+GTimeVal firmware_updated = {0};
+
+static libusb_context *usb_context = NULL;
+
+static uint64_t supported_samplerates[] = {
+ KHZ(200),
+ KHZ(250),
+ KHZ(500),
+ MHZ(1),
+ MHZ(2),
+ MHZ(4),
+ MHZ(8),
+ MHZ(12),
+ MHZ(16),
+ MHZ(24),
+ 0
+};
+
+static struct samplerates samplerates = {
+ KHZ(200),
+ MHZ(24),
+ 0,
+ supported_samplerates
+};
+
+/* TODO: all of these should go in a device-specific struct */
+static uint64_t cur_sample_rate = 0;
+static uint64_t limit_samples = 0;
+static uint8_t probe_mask = 0, \
+ trigger_mask[NUM_TRIGGER_STAGES] = {0}, \
+ trigger_value[NUM_TRIGGER_STAGES] = {0}, \
+ trigger_buffer[NUM_TRIGGER_STAGES] = {0};;
+int trigger_stage = TRIGGER_FIRED;
+
+
+static int hw_set_configuration(int device_index, int capability, void *value);
+
+
+/* returns 1 if the device's configuration profile match the Logic firmware's
+ * configuration, 0 otherwise
+ */
+int check_conf_profile(libusb_device *dev)
+{
+ struct libusb_device_descriptor des;
+ struct libusb_config_descriptor *conf_dsc;
+ const struct libusb_interface_descriptor *intf_dsc;
+ int ret;
+
+ ret = -1;
+ conf_dsc = NULL;
+ while(ret == -1)
+ {
+ /* assume it's not a Saleae Logic unless proven wrong */
+ ret = 0;
+
+ if(libusb_get_device_descriptor(dev, &des) != 0)
+ break;
+
+ if(des.bNumConfigurations != 1)
+ /* need exactly 1 configuration */
+ break;
+
+ if(libusb_get_config_descriptor(dev, 0, &conf_dsc) != 0)
+ break;
+
+ if(conf_dsc->bNumInterfaces != 1)
+ /* need exactly 1 interface */
+ break;
+
+ if(conf_dsc->interface[0].num_altsetting != 1)
+ /* need just one alternate setting */
+ break;
+
+ intf_dsc = &(conf_dsc->interface[0].altsetting[0]);
+ if(intf_dsc->bNumEndpoints != 2)
+ /* need 2 endpoints */
+ break;
+
+ if((intf_dsc->endpoint[0].bEndpointAddress & 0x8f) != (1 | LIBUSB_ENDPOINT_OUT))
+ /* first endpoint should be 1 (outbound) */
+ break;
+
+ if((intf_dsc->endpoint[1].bEndpointAddress & 0x8f) != (2 | LIBUSB_ENDPOINT_IN))
+ /* first endpoint should be 2 (inbound) */
+ break;
+
+ /* if we made it here, it must be a Saleae Logic */
+ ret = 1;
+ }
+ if(conf_dsc)
+ libusb_free_config_descriptor(conf_dsc);
+
+ return ret;
+}
+
+
+struct sigrok_device_instance *sl_open_device(int device_index)
+{
+ struct sigrok_device_instance *sdi;
+ libusb_device **devlist;
+ struct libusb_device_descriptor des;
+ int err, skip, i;
+
+ if(!(sdi = get_sigrok_device_instance(device_instances, device_index)))
+ return NULL;
+
+ libusb_get_device_list(usb_context, &devlist);
+ if(sdi->status == ST_INITIALIZING)
+ {
+ /* this device was renumerating last time we touched it. opendev() guarantees we've
+ * waited long enough for it to have booted properly, so now we need to find it on
+ * the bus and record its new address.
+ */
+ skip = 0;
+ for(i = 0; devlist[i]; i++)
+ {
+ if( (err = libusb_get_device_descriptor(devlist[i], &des)) )
+ {
+ g_warning("failed to get device descriptor: %d", err);
+ continue;
+ }
+
+ if(des.idVendor == USB_VENDOR && des.idProduct == USB_PRODUCT)
+ {
+ if(skip != device_index)
+ {
+ /* skip past devices of this type that aren't the one we want */
+ skip++;
+ continue;
+ }
+
+ /* should check the bus here, since we know that already... but what
+ * are we going to do if it doesn't match after the right number of skips?
+ */
+
+ if( !(err = libusb_open(devlist[i], &(sdi->usb->devhdl))) )
+ {
+ sdi->usb->address = libusb_get_device_address(devlist[i]);
+ sdi->status = ST_ACTIVE;
+ g_message("opened device %d on %d.%d interface %d", sdi->index, sdi->usb->bus,
+ sdi->usb->address, USB_INTERFACE);
+ }
+ else
+ {
+ g_warning("failed to open device: %d", err);
+ sdi = NULL;
+ }
+ }
+ }
+ }
+ else if(sdi->status == ST_INACTIVE)
+ {
+ /* this device is fully enumerated, so we need to find this device by
+ * vendor, product, bus and address */
+ libusb_get_device_list(usb_context, &devlist);
+ for(i = 0; devlist[i]; i++)
+ {
+ if( (err = libusb_get_device_descriptor(devlist[i], &des)) )
+ {
+ g_warning("failed to get device descriptor: %d", err);
+ continue;
+ }
+
+ if(des.idVendor == USB_VENDOR && des.idProduct == USB_PRODUCT)
+ {
+ if(libusb_get_bus_number(devlist[i]) == sdi->usb->bus &&
+ libusb_get_device_address(devlist[i]) == sdi->usb->address)
+ {
+ /* found it */
+ if( !(err = libusb_open(devlist[i], &(sdi->usb->devhdl))) )
+ {
+ sdi->status = ST_ACTIVE;
+ g_message("opened device %d on %d.%d interface %d", sdi->index, sdi->usb->bus,
+ sdi->usb->address, USB_INTERFACE);
+ }
+ else
+ {
+ g_warning("failed to open device: %d", err);
+ sdi = NULL;
+ }
+ }
+ }
+ }
+ }
+ else
+ {
+ /* status must be ST_ACTIVE, i.e. already in use... */
+ sdi = NULL;
+ }
+ libusb_free_device_list(devlist, 1);
+
+ if(sdi && sdi->status != ST_ACTIVE)
+ sdi = NULL;
+
+ return sdi;
+}
+
+
+int upload_firmware(libusb_device *dev)
+{
+ struct libusb_device_handle *hdl;
+ int err;
+
+ g_message("uploading firmware to device on %d.%d",
+ libusb_get_bus_number(dev), libusb_get_device_address(dev));
+
+ err = libusb_open(dev, &hdl);
+ if(err != 0)
+ {
+ g_warning("failed to open device: %d", err);
+ return 1;
+ }
+
+ err = libusb_set_configuration(hdl, USB_CONFIGURATION);
+ if(err != 0)
+ {
+ g_warning("Unable to set configuration: %d", err);
+ return 1;
+ }
+
+ if((ezusb_reset(hdl, 1)) < 0)
+ return 1;
+
+ if(ezusb_install_firmware(hdl, FIRMWARE) != 0)
+ return 1;
+
+ if((ezusb_reset(hdl, 0)) < 0)
+ return 1;
+
+ libusb_close(hdl);
+
+ /* remember when the last firmware update was done */
+ g_get_current_time(&firmware_updated);
+
+ return 0;
+}
+
+
+static void close_device(struct sigrok_device_instance *sdi)
+{
+
+ if(sdi->usb->devhdl)
+ {
+ g_message("closing device %d on %d.%d interface %d", sdi->index, sdi->usb->bus,
+ sdi->usb->address, USB_INTERFACE);
+ libusb_release_interface(sdi->usb->devhdl, USB_INTERFACE);
+ libusb_close(sdi->usb->devhdl);
+ sdi->usb->devhdl = NULL;
+ sdi->status = ST_INACTIVE;
+ }
+
+}
+
+
+static int configure_probes(GSList *probes)
+{
+ struct probe *probe;
+ GSList *l;
+ int probe_bit, stage, i;
+ char *tc;
+
+ probe_mask = 0;
+ for(i = 0; i < NUM_TRIGGER_STAGES; i++)
+ {
+ trigger_mask[i] = 0;
+ trigger_value[i] = 0;
+ }
+
+ stage = -1;
+ for(l = probes; l; l = l->next)
+ {
+ probe = (struct probe *) l->data;
+ if(probe->enabled == FALSE)
+ continue;
+ probe_bit = 1 << (probe->index - 1);
+ probe_mask |= probe_bit;
+ if(probe->trigger)
+ {
+ stage = 0;
+ for(tc = probe->trigger; *tc; tc++)
+ {
+ trigger_mask[stage] |= probe_bit;
+ if(*tc == '1')
+ trigger_value[stage] |= probe_bit;
+ stage++;
+ if(stage > NUM_TRIGGER_STAGES)
+ return SIGROK_NOK;
+ }
+ }
+ }
+
+ if(stage == -1)
+ /* we didn't configure any triggers, make sure acquisition doesn't wait for any */
+ trigger_stage = TRIGGER_FIRED;
+ else
+ trigger_stage = 0;
+
+ return SIGROK_OK;
+}
+
+
+
+/*
+ * API callbacks
+ */
+
+static int hw_init(char *deviceinfo)
+{
+ struct sigrok_device_instance *sdi;
+ struct libusb_device_descriptor des;
+ libusb_device **devlist;
+ int err, devcnt, i;
+
+ if(libusb_init(&usb_context) != 0) {
+ g_warning("Failed to initialize USB.");
+ return 0;
+ }
+ libusb_set_debug(usb_context, 3);
+
+ /* find all Saleae Logic devices and upload firmware to all of them */
+ devcnt = 0;
+ libusb_get_device_list(usb_context, &devlist);
+ for(i = 0; devlist[i]; i++) {
+ err = libusb_get_device_descriptor(devlist[i], &des);
+ if(err != 0) {
+ g_warning("failed to get device descriptor: %d", err);
+ continue;
+ }
+
+ if(des.idVendor == USB_VENDOR && des.idProduct == USB_PRODUCT) {
+ /* definitely a Saleae Logic */
+
+ sdi = sigrok_device_instance_new(devcnt, ST_INITIALIZING,
+ USB_VENDOR_NAME, USB_MODEL_NAME, USB_MODEL_VERSION);
+ if(!sdi)
+ return 0;
+ device_instances = g_slist_append(device_instances, sdi);
+
+ if(check_conf_profile(devlist[i]) == 0)
+ {
+ if(upload_firmware(devlist[i]) > 0)
+ /* continue on the off chance that the device is in a working state */
+ /* TODO: could maybe try a USB reset, or uploading the firmware again... */
+ g_warning("firmware upload failed for device %d", devcnt);
+
+ sdi->usb = usb_device_instance_new(libusb_get_bus_number(devlist[i]), 0, NULL);
+ }
+ else {
+ /* already has the firmware on it, so fix the new address */
+ sdi->usb = usb_device_instance_new(libusb_get_bus_number(devlist[i]),
+ libusb_get_device_address(devlist[i]), NULL);
+ }
+ devcnt++;
+ }
+ }
+ libusb_free_device_list(devlist, 1);
+
+ return devcnt;
+}
+
+
+static int hw_opendev(int device_index)
+{
+ GTimeVal cur_time;
+ struct sigrok_device_instance *sdi;
+ int timediff, err;
+ unsigned int cur, upd;
+
+ if(firmware_updated.tv_sec > 0) {
+ /* firmware was recently uploaded */
+ g_get_current_time(&cur_time);
+ cur = cur_time.tv_sec * 1000 + cur_time.tv_usec / 1000;
+ upd = firmware_updated.tv_sec * 1000 + firmware_updated.tv_usec / 1000;
+ timediff = cur - upd;
+ if(timediff < FIRMWARE_RENUM_DELAY) {
+ timediff = FIRMWARE_RENUM_DELAY - timediff;
+ g_message("waiting %d ms for device to reset", timediff);
+ g_usleep(timediff * 1000);
+ firmware_updated.tv_sec = 0;
+ }
+ }
+
+ if( !(sdi = sl_open_device(device_index)) ) {
+ g_warning("unable to open device");
+ return SIGROK_NOK;
+ }
+
+ err = libusb_claim_interface(sdi->usb->devhdl, USB_INTERFACE);
+ if(err != 0) {
+ g_warning("Unable to claim interface: %d", err);
+ return SIGROK_NOK;
+ }
+
+ if(cur_sample_rate == 0) {
+ /* sample rate hasn't been set; default to the slowest it has */
+ if(hw_set_configuration(device_index, HWCAP_SAMPLERATE, &supported_samplerates[0]) == SIGROK_NOK)
+ return SIGROK_NOK;
+ }
+
+ return SIGROK_OK;
+}
+
+
+static void hw_closedev(int device_index)
+{
+ struct sigrok_device_instance *sdi;
+
+ if( (sdi = get_sigrok_device_instance(device_instances, device_index)) )
+ close_device(sdi);
+
+}
+
+
+static void hw_cleanup(void)
+{
+ GSList *l;
+
+ /* properly close all devices */
+ for(l = device_instances; l; l = l->next)
+ close_device( (struct sigrok_device_instance *) l->data);
+
+ /* and free all their memory */
+ for(l = device_instances; l; l = l->next)
+ g_free(l->data);
+ g_slist_free(device_instances);
+ device_instances = NULL;
+
+ if(usb_context)
+ libusb_exit(usb_context);
+ usb_context = NULL;
+
+}
+
+
+static void *hw_get_device_info(int device_index, int device_info_id)
+{
+ struct sigrok_device_instance *sdi;
+ void *info;
+
+ if( !(sdi = get_sigrok_device_instance(device_instances, device_index)) )
+ return NULL;
+
+ info = NULL;
+ switch(device_info_id)
+ {
+ case DI_INSTANCE:
+ info = sdi;
+ break;
+ case DI_NUM_PROBES:
+ info = GINT_TO_POINTER(NUM_PROBES);
+ break;
+ case DI_SAMPLERATES:
+ info = &samplerates;
+ break;
+ case DI_TRIGGER_TYPES:
+ info = TRIGGER_TYPES;
+ break;
+ case DI_CUR_SAMPLE_RATE:
+ info = &cur_sample_rate;
+ break;
+ }
+
+ return info;
+}
+
+
+static int hw_get_status(int device_index)
+{
+ struct sigrok_device_instance *sdi;
+
+ sdi = get_sigrok_device_instance(device_instances, device_index);
+ if(sdi)
+ return sdi->status;
+ else
+ return ST_NOT_FOUND;
+}
+
+
+static int *hw_get_capabilities(void)
+{
+
+ return capabilities;
+}
+
+
+static int set_configuration_samplerate(struct sigrok_device_instance *sdi, uint64_t samplerate)
+{
+ uint8_t divider;
+ int ret, result, i;
+ unsigned char buf[2];
+
+ for(i = 0; supported_samplerates[i]; i++) {
+ if(supported_samplerates[i] == samplerate)
+ break;
+ }
+ if(supported_samplerates[i] == 0)
+ return SIGROK_ERR_BADVALUE;
+
+ divider = (uint8_t) (48 / (float) (samplerate/1000000)) - 1;
+
+ g_message("setting sample rate to %"PRIu64" Hz (divider %d)", samplerate, divider);
+ buf[0] = 0x01;
+ buf[1] = divider;
+ ret = libusb_bulk_transfer(sdi->usb->devhdl, 1 | LIBUSB_ENDPOINT_OUT, buf, 2, &result, 500);
+ if(ret != 0) {
+ g_warning("failed to set samplerate: %d", ret);
+ return SIGROK_NOK;
+ }
+ cur_sample_rate = samplerate;
+
+ return SIGROK_OK;
+}
+
+
+static int hw_set_configuration(int device_index, int capability, void *value)
+{
+ struct sigrok_device_instance *sdi;
+ int ret;
+ uint64_t *tmp_u64;
+
+ if( !(sdi = get_sigrok_device_instance(device_instances, device_index)) )
+ return SIGROK_NOK;
+
+ if(capability == HWCAP_SAMPLERATE) {
+ tmp_u64 = value;
+ ret = set_configuration_samplerate(sdi, *tmp_u64);
+ }
+ else if(capability == HWCAP_PROBECONFIG)
+ ret = configure_probes( (GSList *) value);
+ else if(capability == HWCAP_LIMIT_SAMPLES) {
+ limit_samples = strtoull(value, NULL, 10);
+ ret = SIGROK_OK;
+ }
+ else
+ ret = SIGROK_NOK;
+
+ return ret;
+}
+
+
+static int receive_data(int fd, int revents, void *user_data)
+{
+ struct timeval tv;
+
+ tv.tv_sec = tv.tv_usec = 0;
+ libusb_handle_events_timeout(usb_context, &tv);
+
+ return TRUE;
+}
+
+
+void receive_transfer(struct libusb_transfer *transfer)
+{
+ static int num_samples = 0;
+ static int empty_transfer_count = 0;
+
+ struct datafeed_packet packet;
+ void *user_data;
+ int cur_buflen, trigger_offset, i;
+ unsigned char *cur_buf, *new_buf;
+
+ if(transfer == NULL) {
+ /* hw_stop_acquisition() telling us to stop */
+ num_samples = -1;
+ }
+
+ if(num_samples == -1) {
+ /* acquisition has already ended, just free any queued up transfer that come in */
+ libusb_free_transfer(transfer);
+ }
+ else {
+ g_message("receive_transfer(): status %d received %d bytes", transfer->status, transfer->actual_length);
+
+ /* save the incoming transfer before reusing the transfer struct */
+ cur_buf = transfer->buffer;
+ cur_buflen = transfer->actual_length;
+ user_data = transfer->user_data;
+
+ /* fire off a new request */
+ new_buf = g_malloc(4096);
+ transfer->buffer = new_buf;
+ transfer->length = 4096;
+ if(libusb_submit_transfer(transfer) != 0) {
+ /* TODO: stop session? */
+ g_warning("eek");
+ }
+
+ if(cur_buflen == 0) {
+ empty_transfer_count++;
+ if(empty_transfer_count > MAX_EMPTY_TRANSFERS) {
+ /* the FX2 gave up... end the acquisition, the frontend will work
+ * out that the samplecount is short
+ */
+ packet.type = DF_END;
+ session_bus(user_data, &packet);
+ num_samples = -1;
+ }
+ return;
+ }
+ else
+ empty_transfer_count = 0;
+
+ trigger_offset = 0;
+ if(trigger_stage >= 0)
+ {
+ for(i = 0; i < cur_buflen; i++)
+ {
+ if((cur_buf[i] & trigger_mask[trigger_stage]) == trigger_value[trigger_stage])
+ {
+ /* match on this trigger stage */
+ trigger_buffer[trigger_stage] = cur_buf[i];
+ trigger_stage++;
+ if(trigger_stage == NUM_TRIGGER_STAGES || trigger_mask[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 = DF_TRIGGER;
+ packet.length = 0;
+ session_bus(user_data, &packet);
+
+ /* send the samples that triggered it, since we're skipping past them */
+ packet.type = DF_LOGIC8;
+ packet.length = trigger_stage;
+ packet.payload = trigger_buffer;
+ session_bus(user_data, &packet);
+ break;
+
+ trigger_stage = TRIGGER_FIRED;
+ }
+ }
+ else if(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 -= trigger_stage;
+ if(i < -1)
+ /* oops, went back past this buffer */
+ i = -1;
+ /* reset trigger stage */
+ trigger_stage = 0;
+ }
+ }
+ }
+
+ if(trigger_stage == TRIGGER_FIRED)
+ {
+ /* send the incoming transfer to the session bus */
+ packet.type = DF_LOGIC8;
+ packet.length = cur_buflen - trigger_offset;
+ packet.payload = cur_buf + trigger_offset;
+ session_bus(user_data, &packet);
+ g_free(cur_buf);
+
+ num_samples += cur_buflen;
+ if(num_samples > limit_samples)
+ {
+ /* end the acquisition */
+ packet.type = DF_END;
+ session_bus(user_data, &packet);
+ num_samples = -1;
+ }
+ }
+ else
+ {
+ /* TODO: buffer pre-trigger data in capture ratio-sized buffer */
+
+ }
+ }
+
+}
+
+
+static int hw_start_acquisition(int device_index, gpointer session_device_id)
+{
+ struct sigrok_device_instance *sdi;
+ struct datafeed_packet *packet;
+ struct datafeed_header *header;
+ struct libusb_transfer *transfer;
+ const struct libusb_pollfd **lupfd;
+ int size, i;
+ unsigned char *buf;
+
+ if( !(sdi = get_sigrok_device_instance(device_instances, device_index)))
+ return SIGROK_NOK;
+
+ packet = g_malloc(sizeof(struct datafeed_packet));
+ header = g_malloc(sizeof(struct datafeed_header));
+ if(!packet || !header)
+ return SIGROK_NOK;
+
+ /* start with 2K transfer, subsequently increased to 4K */
+ size = 2048;
+ for(i = 0; i < NUM_SIMUL_TRANSFERS; i++) {
+ buf = g_malloc(size);
+ transfer = libusb_alloc_transfer(0);
+ libusb_fill_bulk_transfer(transfer, sdi->usb->devhdl, 2 | LIBUSB_ENDPOINT_IN, buf, size,
+ receive_transfer, session_device_id, 40);
+ if(libusb_submit_transfer(transfer) != 0) {
+ /* TODO: free them all */
+ libusb_free_transfer(transfer);
+ g_free(buf);
+ return SIGROK_NOK;
+ }
+ size = 4096;
+ }
+
+ lupfd = libusb_get_pollfds(usb_context);
+ for(i = 0; lupfd[i]; i++)
+ source_add(lupfd[i]->fd, lupfd[i]->events, -1, receive_data, NULL);
+ free(lupfd);
+
+ packet->type = DF_HEADER;
+ packet->length = sizeof(struct datafeed_header);
+ packet->payload = (unsigned char *) header;
+ header->feed_version = 1;
+ gettimeofday(&header->starttime, NULL);
+ header->rate = cur_sample_rate;
+ header->protocol_id = PROTO_RAW;
+ header->num_probes = NUM_PROBES;
+ session_bus(session_device_id, packet);
+ g_free(header);
+ g_free(packet);
+
+ return SIGROK_OK;
+}
+
+
+/* this stops acquisition on ALL devices, ignoring device_index */
+static void hw_stop_acquisition(int device_index, gpointer session_device_id)
+{
+ struct datafeed_packet packet;
+
+ packet.type = DF_END;
+ session_bus(session_device_id, &packet);
+
+ receive_transfer(NULL);
+
+ /* TODO: need to cancel and free any queued up transfers */
+
+}
+
+
+
+struct device_plugin saleae_logic_plugin_info = {
+ "saleae-logic",
+ 1,
+ hw_init,
+ hw_cleanup,
+
+ hw_opendev,
+ hw_closedev,
+ hw_get_device_info,
+ hw_get_status,
+ hw_get_capabilities,
+ hw_set_configuration,
+ hw_start_acquisition,
+ hw_stop_acquisition
+};
+