X-Git-Url: https://sigrok.org/gitweb/?p=libsigrok.git;a=blobdiff_plain;f=hardware%2Fhantek-dso%2Fapi.c;h=c948e4216a8260ea591f207a5ebaf9d62feeb375;hp=4fd07eab18f38a8244553f2c6057289cb6e11bc3;hb=43cd4637285833706f8a404ca027bcf0ee75b9ae;hpb=2ce9f04629e93c4d202608dec6fa72d52aa44c6c

diff --git a/hardware/hantek-dso/api.c b/hardware/hantek-dso/api.c
index 4fd07eab..c948e421 100644
--- a/hardware/hantek-dso/api.c
+++ b/hardware/hantek-dso/api.c
@@ -1,5 +1,5 @@
 /*
- * This file is part of the sigrok project.
+ * This file is part of the libsigrok project.
  *
  * Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
  *
@@ -31,62 +31,75 @@
 #include <libusb.h>
 #include "libsigrok.h"
 #include "libsigrok-internal.h"
-#include "config.h"
 #include "dso.h"
 
-
 /* Max time in ms before we want to check on USB events */
 /* TODO tune this properly */
-#define TICK    1
-
-static const int hwcaps[] = {
-	SR_HWCAP_OSCILLOSCOPE,
-	SR_HWCAP_LIMIT_SAMPLES,
-	SR_HWCAP_CONTINUOUS,
-	SR_HWCAP_TIMEBASE,
-	SR_HWCAP_BUFFERSIZE,
-	SR_HWCAP_TRIGGER_SOURCE,
-	SR_HWCAP_TRIGGER_SLOPE,
-	SR_HWCAP_HORIZ_TRIGGERPOS,
-	SR_HWCAP_FILTER,
-	SR_HWCAP_VDIV,
-	SR_HWCAP_COUPLING,
-	0,
+#define TICK 1
+
+#define NUM_TIMEBASE  10
+#define NUM_VDIV      8
+
+static const int32_t scanopts[] = {
+	SR_CONF_CONN,
 };
 
-static const char *probe_names[] = {
-	"CH1",
-	"CH2",
+static const int32_t devopts[] = {
+	SR_CONF_OSCILLOSCOPE,
+	SR_CONF_LIMIT_FRAMES,
+	SR_CONF_CONTINUOUS,
+	SR_CONF_TIMEBASE,
+	SR_CONF_BUFFERSIZE,
+	SR_CONF_TRIGGER_SOURCE,
+	SR_CONF_TRIGGER_SLOPE,
+	SR_CONF_HORIZ_TRIGGERPOS,
+	SR_CONF_FILTER,
+	SR_CONF_VDIV,
+	SR_CONF_COUPLING,
+	SR_CONF_NUM_TIMEBASE,
+	SR_CONF_NUM_VDIV,
+};
+
+static const char *channel_names[] = {
+	"CH1", "CH2",
 	NULL,
 };
 
+static const uint64_t buffersizes_32k[] = {
+	10240, 32768,
+};
+static const uint64_t buffersizes_512k[] = {
+	10240, 524288,
+};
+static const uint64_t buffersizes_14k[] = {
+	10240, 14336,
+};
+
 static const struct dso_profile dev_profiles[] = {
 	{	0x04b4, 0x2090, 0x04b5, 0x2090,
 		"Hantek", "DSO-2090",
-		FIRMWARE_DIR "/hantek-dso-2xxx.fw" },
+		buffersizes_32k,
+		FIRMWARE_DIR "/hantek-dso-2090.fw" },
 	{	0x04b4, 0x2150, 0x04b5, 0x2150,
 		"Hantek", "DSO-2150",
-		FIRMWARE_DIR "/hantek-dso-2xxx.fw" },
+		buffersizes_32k,
+		FIRMWARE_DIR "/hantek-dso-2150.fw" },
 	{	0x04b4, 0x2250, 0x04b5, 0x2250,
 		"Hantek", "DSO-2250",
-		FIRMWARE_DIR "/hantek-dso-2xxx.fw" },
+		buffersizes_512k,
+		FIRMWARE_DIR "/hantek-dso-2250.fw" },
 	{	0x04b4, 0x5200, 0x04b5, 0x5200,
 		"Hantek", "DSO-5200",
-		FIRMWARE_DIR "/hantek-dso-5xxx.fw" },
+		buffersizes_14k,
+		FIRMWARE_DIR "/hantek-dso-5200.fw" },
 	{	0x04b4, 0x520a, 0x04b5, 0x520a,
 		"Hantek", "DSO-5200A",
-		FIRMWARE_DIR "/hantek-dso-5xxx.fw" },
-	{ 0, 0, 0, 0, 0, 0, 0 },
-};
-
-static const uint64_t buffersizes[] = {
-	10240,
-	32768,
-	/* TODO: 65535 */
-	0,
+		buffersizes_512k,
+		FIRMWARE_DIR "/hantek-dso-5200A.fw" },
+	{ 0, 0, 0, 0, 0, 0, 0, 0 },
 };
 
-static const struct sr_rational timebases[] = {
+static const uint64_t timebases[][2] = {
 	/* microseconds */
 	{ 10, 1000000 },
 	{ 20, 1000000 },
@@ -104,10 +117,9 @@ static const struct sr_rational timebases[] = {
 	{ 100, 1000 },
 	{ 200, 1000 },
 	{ 400, 1000 },
-	{ 0, 0},
 };
 
-static const struct sr_rational vdivs[] = {
+static const uint64_t vdivs[][2] = {
 	/* millivolts */
 	{ 10, 1000 },
 	{ 20, 1000 },
@@ -119,7 +131,6 @@ static const struct sr_rational vdivs[] = {
 	{ 1, 1 },
 	{ 2, 1 },
 	{ 5, 1 },
-	{ 0, 0 },
 };
 
 static const char *trigger_sources[] = {
@@ -127,144 +138,174 @@ static const char *trigger_sources[] = {
 	"CH2",
 	"EXT",
 	/* TODO: forced */
-	NULL,
 };
 
 static const char *filter_targets[] = {
 	"CH1",
 	"CH2",
 	/* TODO: "TRIGGER", */
-	NULL,
 };
 
 static const char *coupling[] = {
 	"AC",
 	"DC",
 	"GND",
-	NULL,
 };
 
-SR_PRIV libusb_context *usb_context = NULL;
 SR_PRIV struct sr_dev_driver hantek_dso_driver_info;
-static struct sr_dev_driver *hdi = &hantek_dso_driver_info;
+static struct sr_dev_driver *di = &hantek_dso_driver_info;
+
+static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data);
 
 static struct sr_dev_inst *dso_dev_new(int index, const struct dso_profile *prof)
 {
 	struct sr_dev_inst *sdi;
-	struct context *ctx;
+	struct sr_channel *ch;
+	struct drv_context *drvc;
+	struct dev_context *devc;
+	int i;
 
 	sdi = sr_dev_inst_new(index, SR_ST_INITIALIZING,
 		prof->vendor, prof->model, NULL);
 	if (!sdi)
 		return NULL;
-	sdi->driver = hdi;
+	sdi->driver = di;
+
+	/*
+	 * Add only the real channels -- EXT isn't a source of data, only
+	 * a trigger source internal to the device.
+	 */
+	for (i = 0; channel_names[i]; i++) {
+		if (!(ch = sr_channel_new(i, SR_CHANNEL_ANALOG, TRUE,
+				channel_names[i])))
+			return NULL;
+		sdi->channels = g_slist_append(sdi->channels, ch);
+	}
 
-	if (!(ctx = g_try_malloc0(sizeof(struct context)))) {
-		sr_err("hantek-dso: ctx malloc failed");
+	if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
+		sr_err("Device context malloc failed.");
 		return NULL;
 	}
-	ctx->profile = prof;
-	ctx->dev_state = IDLE;
-	ctx->timebase = DEFAULT_TIMEBASE;
-	ctx->ch1_enabled = TRUE;
-	ctx->ch2_enabled = TRUE;
-	ctx->voltage_ch1 = DEFAULT_VOLTAGE;
-	ctx->voltage_ch2 = DEFAULT_VOLTAGE;
-	ctx->coupling_ch1 = DEFAULT_COUPLING;
-	ctx->coupling_ch2 = DEFAULT_COUPLING;
-	ctx->voffset_ch1 = DEFAULT_VERT_OFFSET;
-	ctx->voffset_ch2 = DEFAULT_VERT_OFFSET;
-	ctx->voffset_trigger = DEFAULT_VERT_TRIGGERPOS;
-	ctx->framesize = DEFAULT_FRAMESIZE;
-	ctx->triggerslope = SLOPE_POSITIVE;
-	ctx->triggersource = g_strdup(DEFAULT_TRIGGER_SOURCE);
-	ctx->triggerposition = DEFAULT_HORIZ_TRIGGERPOS;
-	sdi->priv = ctx;
-	hdi->instances = g_slist_append(hdi->instances, sdi);
+
+	devc->profile = prof;
+	devc->dev_state = IDLE;
+	devc->timebase = DEFAULT_TIMEBASE;
+	devc->ch1_enabled = TRUE;
+	devc->ch2_enabled = TRUE;
+	devc->voltage_ch1 = DEFAULT_VOLTAGE;
+	devc->voltage_ch2 = DEFAULT_VOLTAGE;
+	devc->coupling_ch1 = DEFAULT_COUPLING;
+	devc->coupling_ch2 = DEFAULT_COUPLING;
+	devc->voffset_ch1 = DEFAULT_VERT_OFFSET;
+	devc->voffset_ch2 = DEFAULT_VERT_OFFSET;
+	devc->voffset_trigger = DEFAULT_VERT_TRIGGERPOS;
+	devc->framesize = DEFAULT_FRAMESIZE;
+	devc->triggerslope = SLOPE_POSITIVE;
+	devc->triggersource = g_strdup(DEFAULT_TRIGGER_SOURCE);
+	devc->triggerposition = DEFAULT_HORIZ_TRIGGERPOS;
+	sdi->priv = devc;
+	drvc = di->priv;
+	drvc->instances = g_slist_append(drvc->instances, sdi);
 
 	return sdi;
 }
 
-static int configure_probes(struct context *ctx, const GSList *probes)
+static int configure_channels(const struct sr_dev_inst *sdi)
 {
-	const struct sr_probe *probe;
+	struct dev_context *devc;
+	struct sr_channel *ch;
 	const GSList *l;
-
-	ctx->ch1_enabled = ctx->ch2_enabled = FALSE;
-	for (l = probes; l; l = l->next) {
-		probe = (struct sr_probe *)l->data;
-		if (probe->index == 1)
-			ctx->ch1_enabled = probe->enabled;
-		else if (probe->index == 2)
-			ctx->ch2_enabled = probe->enabled;
+	int p;
+
+	devc = sdi->priv;
+
+	g_slist_free(devc->enabled_channels);
+	devc->ch1_enabled = devc->ch2_enabled = FALSE;
+	for (l = sdi->channels, p = 0; l; l = l->next, p++) {
+		ch = l->data;
+		if (p == 0)
+			devc->ch1_enabled = ch->enabled;
+		else
+			devc->ch2_enabled = ch->enabled;
+		if (ch->enabled)
+			devc->enabled_channels = g_slist_append(devc->enabled_channels, ch);
 	}
 
 	return SR_OK;
 }
 
-/* Properly close and free all devices. */
-static void clear_instances(void)
+static void clear_dev_context(void *priv)
 {
-	struct sr_dev_inst *sdi;
-	struct context *ctx;
-	GSList *l;
-
-	for (l = hdi->instances; l; l = l->next) {
-		if (!(sdi = l->data)) {
-			/* Log error, but continue cleaning up the rest. */
-			sr_err("hantek-dso: %s: sdi was NULL, continuing", __func__);
-			continue;
-		}
-		if (!(ctx = sdi->priv)) {
-			/* Log error, but continue cleaning up the rest. */
-			sr_err("hantek-dso: %s: sdi->priv was NULL, continuing", __func__);
-			continue;
-		}
-		dso_close(sdi);
-		sr_usb_dev_inst_free(ctx->usb);
-		g_free(ctx->triggersource);
-
-		sr_dev_inst_free(sdi);
-	}
+	struct dev_context *devc;
 
-	g_slist_free(hdi->instances);
-	hdi->instances = NULL;
+	devc = priv;
+	g_free(devc->triggersource);
+	g_slist_free(devc->enabled_channels);
 
 }
 
-static int hw_init(void)
+static int dev_clear(void)
 {
+	return std_dev_clear(di, clear_dev_context);
+}
 
-	if (libusb_init(&usb_context) != 0) {
-		sr_err("hantek-dso: Failed to initialize USB.");
-		return SR_ERR;
-	}
-
-	return SR_OK;
+static int init(struct sr_context *sr_ctx)
+{
+	return std_init(sr_ctx, di, LOG_PREFIX);
 }
 
-static GSList *hw_scan(GSList *options)
+static GSList *scan(GSList *options)
 {
+	struct drv_context *drvc;
+	struct dev_context *devc;
 	struct sr_dev_inst *sdi;
+	struct sr_usb_dev_inst *usb;
+	struct sr_config *src;
 	const struct dso_profile *prof;
-	struct context *ctx;
-	GSList *devices;
+	GSList *l, *devices, *conn_devices;
 	struct libusb_device_descriptor des;
 	libusb_device **devlist;
 	int devcnt, ret, i, j;
+	const char *conn;
+
+	drvc = di->priv;
 
-	(void)options;
 	devcnt = 0;
 	devices = 0;
-	hdi->instances = NULL;
 
-	clear_instances();
+	conn = NULL;
+	for (l = options; l; l = l->next) {
+		src = l->data;
+		if (src->key == 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 Hantek DSO devices and upload firmware to all of them. */
-	libusb_get_device_list(usb_context, &devlist);
+	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))) {
-			sr_err("hantek-dso: failed to get device descriptor: %d", ret);
+			sr_err("Failed to get device descriptor: %s.",
+					libusb_error_name(ret));
 			continue;
 		}
 
@@ -274,19 +315,19 @@ static GSList *hw_scan(GSList *options)
 				&& des.idProduct == dev_profiles[j].orig_pid) {
 				/* Device matches the pre-firmware profile. */
 				prof = &dev_profiles[j];
-				sr_dbg("hantek-dso: Found a %s %s.", prof->vendor, prof->model);
+				sr_dbg("Found a %s %s.", prof->vendor, prof->model);
 				sdi = dso_dev_new(devcnt, prof);
 				devices = g_slist_append(devices, sdi);
-				ctx = sdi->priv;
+				devc = sdi->priv;
 				if (ezusb_upload_firmware(devlist[i], USB_CONFIGURATION,
 						prof->firmware) == SR_OK)
 					/* Remember when the firmware on this device was updated */
-					ctx->fw_updated = g_get_monotonic_time();
+					devc->fw_updated = g_get_monotonic_time();
 				else
-					sr_err("hantek-dso: firmware upload failed for "
-					       "device %d", devcnt);
+					sr_err("Firmware upload failed for "
+					        "device %d.", devcnt);
 				/* Dummy USB address of 0xff will get overwritten later. */
-				ctx->usb = sr_usb_dev_inst_new(
+				sdi->conn = sr_usb_dev_inst_new(
 						libusb_get_bus_number(devlist[i]), 0xff, NULL);
 				devcnt++;
 				break;
@@ -294,12 +335,13 @@ static GSList *hw_scan(GSList *options)
 				&& des.idProduct == dev_profiles[j].fw_pid) {
 				/* Device matches the post-firmware profile. */
 				prof = &dev_profiles[j];
-				sr_dbg("hantek-dso: Found a %s %s.", prof->vendor, prof->model);
+				sr_dbg("Found a %s %s.", prof->vendor, prof->model);
 				sdi = dso_dev_new(devcnt, prof);
 				sdi->status = SR_ST_INACTIVE;
 				devices = g_slist_append(devices, sdi);
-				ctx = sdi->priv;
-				ctx->usb = sr_usb_dev_inst_new(
+				devc = sdi->priv;
+				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);
 				devcnt++;
@@ -315,247 +357,221 @@ static GSList *hw_scan(GSList *options)
 	return devices;
 }
 
-static int hw_dev_open(int dev_index)
+static GSList *dev_list(void)
 {
-	struct sr_dev_inst *sdi;
-	struct context *ctx;
+	return ((struct drv_context *)(di->priv))->instances;
+}
+
+static int dev_open(struct sr_dev_inst *sdi)
+{
+	struct dev_context *devc;
+	struct sr_usb_dev_inst *usb;
 	int64_t timediff_us, timediff_ms;
 	int err;
 
-	if (!(sdi = sr_dev_inst_get(hdi->instances, dev_index)))
-		return SR_ERR_ARG;
-	ctx = sdi->priv;
+	devc = sdi->priv;
+	usb = sdi->conn;
 
 	/*
-	 * if the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
-	 * for the FX2 to renumerate
+	 * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
+	 * for the FX2 to renumerate.
 	 */
 	err = SR_ERR;
-	if (ctx->fw_updated > 0) {
-		sr_info("hantek-dso: waiting for device to reset");
-		/* takes at least 300ms for the FX2 to be gone from the USB bus */
+	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 ((err = dso_open(dev_index)) == SR_OK)
+			if ((err = dso_open(sdi)) == SR_OK)
 				break;
 			g_usleep(100 * 1000);
-			timediff_us = g_get_monotonic_time() - ctx->fw_updated;
+			timediff_us = g_get_monotonic_time() - devc->fw_updated;
 			timediff_ms = timediff_us / 1000;
-			sr_spew("hantek-dso: waited %" PRIi64 " ms", timediff_ms);
+			sr_spew("Waited %" PRIi64 " ms.", timediff_ms);
 		}
-		sr_info("hantek-dso: device came back after %d ms", timediff_ms);
+		sr_info("Device came back after %d ms.", timediff_ms);
 	} else {
-		err = dso_open(dev_index);
+		err = dso_open(sdi);
 	}
 
 	if (err != SR_OK) {
-		sr_err("hantek-dso: unable to open device");
+		sr_err("Unable to open device.");
 		return SR_ERR;
 	}
 
-	err = libusb_claim_interface(ctx->usb->devhdl, USB_INTERFACE);
+	err = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
 	if (err != 0) {
-		sr_err("hantek-dso: Unable to claim interface: %d", err);
+		sr_err("Unable to claim interface: %s.",
+			   libusb_error_name(err));
 		return SR_ERR;
 	}
 
 	return SR_OK;
 }
 
-static int hw_dev_close(int dev_index)
+static int dev_close(struct sr_dev_inst *sdi)
 {
-	struct sr_dev_inst *sdi;
-
-	if (!(sdi = sr_dev_inst_get(hdi->instances, dev_index)))
-		return SR_ERR_ARG;
-
 	dso_close(sdi);
 
 	return SR_OK;
 }
 
-static int hw_cleanup(void)
+static int cleanup(void)
 {
-
-	clear_instances();
-
-	if (usb_context)
-		libusb_exit(usb_context);
-	usb_context = NULL;
-
-	return SR_OK;
+	return dev_clear();
 }
 
-static int hw_info_get(int info_id, const void **data,
-       const struct sr_dev_inst *sdi)
+static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi,
+		const struct sr_channel_group *cg)
 {
-	uint64_t tmp;
-
-	switch (info_id) {
-	case SR_DI_INST:
-		*data = sdi;
-		break;
-	case SR_DI_HWCAPS:
-		*data = hwcaps;
-		break;
-	case SR_DI_NUM_PROBES:
-		*data = GINT_TO_POINTER(NUM_PROBES);
-		break;
-	case SR_DI_PROBE_NAMES:
-		*data = probe_names;
-		break;
-	case SR_DI_BUFFERSIZES:
-		*data = buffersizes;
-		break;
-	case SR_DI_TIMEBASES:
-		*data = timebases;
+	struct sr_usb_dev_inst *usb;
+	char str[128];
+
+	(void)cg;
+
+	switch (id) {
+	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_DI_TRIGGER_SOURCES:
-		*data = trigger_sources;
+	case SR_CONF_NUM_TIMEBASE:
+		*data = g_variant_new_int32(NUM_TIMEBASE);
 		break;
-	case SR_DI_FILTERS:
-		*data = filter_targets;
-		break;
-	case SR_DI_VDIVS:
-		*data = vdivs;
-		break;
-	case SR_DI_COUPLING:
-		*data = coupling;
-		break;
-	/* TODO remove this */
-	case SR_DI_CUR_SAMPLERATE:
-		*data = &tmp;
+	case SR_CONF_NUM_VDIV:
+		*data = g_variant_new_int32(NUM_VDIV);
 		break;
 	default:
-		return SR_ERR_ARG;
+		return SR_ERR_NA;
 	}
 
 	return SR_OK;
 }
 
-static int hw_dev_status_get(int dev_index)
-{
-	struct sr_dev_inst *sdi;
-
-	if (!(sdi = sr_dev_inst_get(hdi->instances, dev_index)))
-		return SR_ST_NOT_FOUND;
-
-	return sdi->status;
-}
-
-static int hw_dev_config_set(int dev_index, int hwcap, const void *value)
+static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi,
+		const struct sr_channel_group *cg)
 {
-	struct sr_dev_inst *sdi;
-	struct context *ctx;
-	struct sr_rational tmp_rat;
-	float tmp_float;
-	uint64_t tmp_u64;
-	int ret, i;
+	struct dev_context *devc;
+	double tmp_double;
+	uint64_t tmp_u64, p, q;
+	int tmp_int, ret;
+	unsigned int i;
+	const char *tmp_str;
 	char **targets;
 
-	if (!(sdi = sr_dev_inst_get(hdi->instances, dev_index)))
-		return SR_ERR;
+	(void)cg;
 
 	if (sdi->status != SR_ST_ACTIVE)
-		return SR_ERR;
+		return SR_ERR_DEV_CLOSED;
 
 	ret = SR_OK;
-	ctx = sdi->priv;
-	switch (hwcap) {
-	case SR_HWCAP_LIMIT_FRAMES:
-		ctx->limit_frames = *(const uint64_t *)value;
+	devc = sdi->priv;
+	switch (id) {
+	case SR_CONF_LIMIT_FRAMES:
+		devc->limit_frames = g_variant_get_uint64(data);
 		break;
-	case SR_HWCAP_PROBECONFIG:
-		ret = configure_probes(ctx, (const GSList *)value);
+	case SR_CONF_TRIGGER_SLOPE:
+		tmp_str = g_variant_get_string(data, NULL);
+		if (!tmp_str || !(tmp_str[0] == 'f' || tmp_str[0] == 'r'))
+			return SR_ERR_ARG;
+		devc->triggerslope = (tmp_str[0] == 'r')
+			? SLOPE_POSITIVE : SLOPE_NEGATIVE;
 		break;
-	case SR_HWCAP_TRIGGER_SLOPE:
-		tmp_u64 = *(const int *)value;
-		if (tmp_u64 != SLOPE_NEGATIVE && tmp_u64 != SLOPE_POSITIVE)
-			ret = SR_ERR_ARG;
-		ctx->triggerslope = tmp_u64;
-		break;
-	case SR_HWCAP_HORIZ_TRIGGERPOS:
-		tmp_float = *(const float *)value;
-		if (tmp_float < 0.0 || tmp_float > 1.0) {
-			sr_err("hantek-dso: trigger position should be between 0.0 and 1.0");
+	case SR_CONF_HORIZ_TRIGGERPOS:
+		tmp_double = g_variant_get_double(data);
+		if (tmp_double < 0.0 || tmp_double > 1.0) {
+			sr_err("Trigger position should be between 0.0 and 1.0.");
 			ret = SR_ERR_ARG;
 		} else
-			ctx->triggerposition = tmp_float;
+			devc->triggerposition = tmp_double;
 		break;
-	case SR_HWCAP_BUFFERSIZE:
-		tmp_u64 = *(const int *)value;
-		for (i = 0; buffersizes[i]; i++) {
-			if (buffersizes[i] == tmp_u64) {
-				ctx->framesize = tmp_u64;
+	case SR_CONF_BUFFERSIZE:
+		tmp_u64 = g_variant_get_uint64(data);
+		for (i = 0; i < 2; i++) {
+			if (devc->profile->buffersizes[i] == tmp_u64) {
+				devc->framesize = tmp_u64;
 				break;
 			}
 		}
-		if (buffersizes[i] == 0)
+		if (i == 2)
 			ret = SR_ERR_ARG;
 		break;
-	case SR_HWCAP_TIMEBASE:
-		tmp_rat = *(const struct sr_rational *)value;
-		for (i = 0; timebases[i].p && timebases[i].q; i++) {
-			if (timebases[i].p == tmp_rat.p
-					&& timebases[i].q == tmp_rat.q) {
-				ctx->timebase = i;
+	case SR_CONF_TIMEBASE:
+		g_variant_get(data, "(tt)", &p, &q);
+		tmp_int = -1;
+		for (i = 0; i < ARRAY_SIZE(timebases); i++) {
+			if (timebases[i][0] == p && timebases[i][1] == q) {
+				tmp_int = i;
 				break;
 			}
 		}
-		if (timebases[i].p == 0 && timebases[i].q == 0)
+		if (tmp_int >= 0)
+			devc->timebase = tmp_int;
+		else
 			ret = SR_ERR_ARG;
 		break;
-	case SR_HWCAP_TRIGGER_SOURCE:
+	case SR_CONF_TRIGGER_SOURCE:
+		tmp_str = g_variant_get_string(data, NULL);
 		for (i = 0; trigger_sources[i]; i++) {
-			if (!strcmp(value, trigger_sources[i])) {
-				ctx->triggersource = g_strdup(value);
+			if (!strcmp(tmp_str, trigger_sources[i])) {
+				devc->triggersource = g_strdup(tmp_str);
 				break;
 			}
 		}
 		if (trigger_sources[i] == 0)
 			ret = SR_ERR_ARG;
 		break;
-	case SR_HWCAP_FILTER:
-		ctx->filter_ch1 = ctx->filter_ch2 = ctx->filter_trigger = 0;
-		targets = g_strsplit(value, ",", 0);
+	case SR_CONF_FILTER:
+		tmp_str = g_variant_get_string(data, NULL);
+		devc->filter_ch1 = devc->filter_ch2 = devc->filter_trigger = 0;
+		targets = g_strsplit(tmp_str, ",", 0);
 		for (i = 0; targets[i]; i++) {
 			if (targets[i] == '\0')
 				/* Empty filter string can be used to clear them all. */
 				;
 			else if (!strcmp(targets[i], "CH1"))
-				ctx->filter_ch1 = TRUE;
+				devc->filter_ch1 = TRUE;
 			else if (!strcmp(targets[i], "CH2"))
-				ctx->filter_ch2 = TRUE;
+				devc->filter_ch2 = TRUE;
 			else if (!strcmp(targets[i], "TRIGGER"))
-				ctx->filter_trigger = TRUE;
+				devc->filter_trigger = TRUE;
 			else {
-				sr_err("invalid filter target %s", targets[i]);
+				sr_err("Invalid filter target %s.", targets[i]);
 				ret = SR_ERR_ARG;
 			}
 		}
 		g_strfreev(targets);
 		break;
-	case SR_HWCAP_VDIV:
-		/* TODO not supporting vdiv per channel yet */
-		tmp_rat = *(const struct sr_rational *)value;
-		for (i = 0; vdivs[i].p && vdivs[i].q; i++) {
-			if (vdivs[i].p == tmp_rat.p
-					&& vdivs[i].q == tmp_rat.q) {
-				ctx->voltage_ch1 = i;
-				ctx->voltage_ch2 = i;
+	case SR_CONF_VDIV:
+		/* TODO: Not supporting vdiv per channel yet. */
+		g_variant_get(data, "(tt)", &p, &q);
+		tmp_int = -1;
+		for (i = 0; i < ARRAY_SIZE(vdivs); i++) {
+			if (vdivs[i][0] == p && vdivs[i][1] == q) {
+				tmp_int = i;
 				break;
 			}
 		}
-		if (vdivs[i].p == 0 && vdivs[i].q == 0)
+		if (tmp_int >= 0) {
+			devc->voltage_ch1 = tmp_int;
+			devc->voltage_ch2 = tmp_int;
+		} else
 			ret = SR_ERR_ARG;
 		break;
-	case SR_HWCAP_COUPLING:
-		/* TODO not supporting coupling per channel yet */
+	case SR_CONF_COUPLING:
+		tmp_str = g_variant_get_string(data, NULL);
+		/* TODO: Not supporting coupling per channel yet. */
 		for (i = 0; coupling[i]; i++) {
-			if (!strcmp(value, coupling[i])) {
-				ctx->coupling_ch1 = i;
-				ctx->coupling_ch2 = i;
+			if (!strcmp(tmp_str, coupling[i])) {
+				devc->coupling_ch1 = i;
+				devc->coupling_ch2 = i;
 				break;
 			}
 		}
@@ -563,72 +579,146 @@ static int hw_dev_config_set(int dev_index, int hwcap, const void *value)
 			ret = SR_ERR_ARG;
 		break;
 	default:
-		ret = SR_ERR_ARG;
+		ret = SR_ERR_NA;
+		break;
 	}
 
 	return ret;
 }
 
-static void send_chunk(struct context *ctx, unsigned char *buf,
+static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
+		const struct sr_channel_group *cg)
+{
+	struct dev_context *devc;
+	GVariant *tuple, *rational[2];
+	GVariantBuilder gvb;
+	unsigned int i;
+
+	(void)cg;
+
+	switch (key) {
+	case SR_CONF_SCAN_OPTIONS:
+		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
+				scanopts, ARRAY_SIZE(scanopts), sizeof(int32_t));
+		break;
+	case SR_CONF_DEVICE_OPTIONS:
+		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
+				devopts, ARRAY_SIZE(devopts), sizeof(int32_t));
+		break;
+	case SR_CONF_BUFFERSIZE:
+		if (!sdi)
+			return SR_ERR_ARG;
+		devc = sdi->priv;
+		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT64,
+				devc->profile->buffersizes, 2, sizeof(uint64_t));
+		break;
+	case SR_CONF_COUPLING:
+		*data = g_variant_new_strv(coupling, ARRAY_SIZE(coupling));
+		break;
+	case SR_CONF_VDIV:
+		g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
+		for (i = 0; i < ARRAY_SIZE(vdivs); i++) {
+			rational[0] = g_variant_new_uint64(vdivs[i][0]);
+			rational[1] = g_variant_new_uint64(vdivs[i][1]);
+			tuple = g_variant_new_tuple(rational, 2);
+			g_variant_builder_add_value(&gvb, tuple);
+		}
+		*data = g_variant_builder_end(&gvb);
+		break;
+	case SR_CONF_FILTER:
+		*data = g_variant_new_strv(filter_targets,
+				ARRAY_SIZE(filter_targets));
+		break;
+	case SR_CONF_TIMEBASE:
+		g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
+		for (i = 0; i < ARRAY_SIZE(timebases); i++) {
+			rational[0] = g_variant_new_uint64(timebases[i][0]);
+			rational[1] = g_variant_new_uint64(timebases[i][1]);
+			tuple = g_variant_new_tuple(rational, 2);
+			g_variant_builder_add_value(&gvb, tuple);
+		}
+		*data = g_variant_builder_end(&gvb);
+		break;
+	case SR_CONF_TRIGGER_SOURCE:
+		*data = g_variant_new_strv(trigger_sources,
+				ARRAY_SIZE(trigger_sources));
+		break;
+	default:
+		return SR_ERR_NA;
+	}
+
+	return SR_OK;
+}
+
+static void send_chunk(struct sr_dev_inst *sdi, unsigned char *buf,
 		int num_samples)
 {
 	struct sr_datafeed_packet packet;
 	struct sr_datafeed_analog analog;
+	struct dev_context *devc;
 	float ch1, ch2, range;
-	int num_probes, data_offset, i;
+	int num_channels, data_offset, i;
 
-	num_probes = (ctx->ch1_enabled && ctx->ch2_enabled) ? 2 : 1;
+	devc = sdi->priv;
+	num_channels = (devc->ch1_enabled && devc->ch2_enabled) ? 2 : 1;
 	packet.type = SR_DF_ANALOG;
 	packet.payload = &analog;
 	/* TODO: support for 5xxx series 9-bit samples */
+	analog.channels = devc->enabled_channels;
 	analog.num_samples = num_samples;
 	analog.mq = SR_MQ_VOLTAGE;
 	analog.unit = SR_UNIT_VOLT;
-	analog.data = g_try_malloc(analog.num_samples * sizeof(float) * num_probes);
+	/* TODO: Check malloc return value. */
+	analog.data = g_try_malloc(analog.num_samples * sizeof(float) * num_channels);
 	data_offset = 0;
 	for (i = 0; i < analog.num_samples; i++) {
-		/* The device always sends data for both channels. If a channel
+		/*
+		 * The device always sends data for both channels. If a channel
 		 * is disabled, it contains a copy of the enabled channel's
-		 * data. However, we only send the requested channels to the bus.
+		 * data. However, we only send the requested channels to
+		 * the bus.
 		 *
-		 * Voltage values are encoded as a value 0-255 (0-512 on the 5200*),
-		 * where the value is a point in the range represented by the vdiv
-		 * setting. There are 8 vertical divs, so e.g. 500mV/div represents
-		 * 4V peak-to-peak where 0 = -2V and 255 = +2V.
+		 * Voltage values are encoded as a value 0-255 (0-512 on the
+		 * DSO-5200*), where the value is a point in the range
+		 * represented by the vdiv setting. There are 8 vertical divs,
+		 * so e.g. 500mV/div represents 4V peak-to-peak where 0 = -2V
+		 * and 255 = +2V.
 		 */
-		/* TODO: support for 5xxx series 9-bit samples */
-		if (ctx->ch1_enabled) {
-			range = ((float)vdivs[ctx->voltage_ch1].p / vdivs[ctx->voltage_ch1].q) * 8;
+		/* TODO: Support for DSO-5xxx series 9-bit samples. */
+		if (devc->ch1_enabled) {
+			range = ((float)vdivs[devc->voltage_ch1][0] / vdivs[devc->voltage_ch1][1]) * 8;
 			ch1 = range / 255 * *(buf + i * 2 + 1);
 			/* Value is centered around 0V. */
 			ch1 -= range / 2;
 			analog.data[data_offset++] = ch1;
 		}
-		if (ctx->ch2_enabled) {
-			range = ((float)vdivs[ctx->voltage_ch2].p / vdivs[ctx->voltage_ch2].q) * 8;
+		if (devc->ch2_enabled) {
+			range = ((float)vdivs[devc->voltage_ch2][0] / vdivs[devc->voltage_ch2][1]) * 8;
 			ch2 = range / 255 * *(buf + i * 2);
 			ch2 -= range / 2;
 			analog.data[data_offset++] = ch2;
 		}
 	}
-	sr_session_send(ctx->cb_data, &packet);
-
+	sr_session_send(devc->cb_data, &packet);
 }
 
-/* Called by libusb (as triggered by handle_event()) when a transfer comes in.
+/*
+ * Called by libusb (as triggered by handle_event()) when a transfer comes in.
  * Only channel data comes in asynchronously, and all transfers for this are
- * queued up beforehand, so this just needs so chuck the incoming data onto
+ * queued up beforehand, so this just needs to chuck the incoming data onto
  * the libsigrok session bus.
  */
 static void receive_transfer(struct libusb_transfer *transfer)
 {
 	struct sr_datafeed_packet packet;
-	struct context *ctx;
+	struct sr_dev_inst *sdi;
+	struct dev_context *devc;
 	int num_samples, pre;
 
-	ctx = transfer->user_data;
-	sr_dbg("hantek-dso: receive_transfer(): status %d received %d bytes",
-			transfer->status, transfer->actual_length);
+	sdi = transfer->user_data;
+	devc = sdi->priv;
+	sr_spew("receive_transfer(): status %d received %d bytes.",
+		   transfer->status, transfer->actual_length);
 
 	if (transfer->actual_length == 0)
 		/* Nothing to send to the bus. */
@@ -636,235 +726,232 @@ static void receive_transfer(struct libusb_transfer *transfer)
 
 	num_samples = transfer->actual_length / 2;
 
-	sr_dbg("hantek-dso: got %d-%d/%d samples in frame", ctx->samp_received + 1,
-			ctx->samp_received + num_samples, ctx->framesize);
+	sr_spew("Got %d-%d/%d samples in frame.", devc->samp_received + 1,
+		   devc->samp_received + num_samples, devc->framesize);
 
-	/* The device always sends a full frame, but the beginning of the frame
+	/*
+	 * The device always sends a full frame, but the beginning of the frame
 	 * doesn't represent the trigger point. The offset at which the trigger
 	 * happened came in with the capture state, so we need to start sending
-	 * from there up the session bus. The samples in the frame buffer before
-	 * that trigger point came after the end of the device's frame buffer was
-	 * reached, and it wrapped around to overwrite up until the trigger point.
+	 * from there up the session bus. The samples in the frame buffer
+	 * before that trigger point came after the end of the device's frame
+	 * buffer was reached, and it wrapped around to overwrite up until the
+	 * trigger point.
 	 */
-	if (ctx->samp_received < ctx->trigger_offset) {
+	if (devc->samp_received < devc->trigger_offset) {
 		/* Trigger point not yet reached. */
-		if (ctx->samp_received + num_samples < ctx->trigger_offset) {
+		if (devc->samp_received + num_samples < devc->trigger_offset) {
 			/* The entire chunk is before the trigger point. */
-			memcpy(ctx->framebuf + ctx->samp_buffered * 2,
+			memcpy(devc->framebuf + devc->samp_buffered * 2,
 					transfer->buffer, num_samples * 2);
-			ctx->samp_buffered += num_samples;
+			devc->samp_buffered += num_samples;
 		} else {
-			/* This chunk hits or overruns the trigger point.
+			/*
+			 * This chunk hits or overruns the trigger point.
 			 * Store the part before the trigger fired, and
-			 * send the rest up to the session bus. */
-			pre = ctx->trigger_offset - ctx->samp_received;
-			memcpy(ctx->framebuf + ctx->samp_buffered * 2,
+			 * send the rest up to the session bus.
+			 */
+			pre = devc->trigger_offset - devc->samp_received;
+			memcpy(devc->framebuf + devc->samp_buffered * 2,
 					transfer->buffer, pre * 2);
-			ctx->samp_buffered += pre;
+			devc->samp_buffered += pre;
 
 			/* The rest of this chunk starts with the trigger point. */
-			sr_dbg("hantek-dso: reached trigger point, %d samples buffered",
-					ctx->samp_buffered);
+			sr_dbg("Reached trigger point, %d samples buffered.",
+				   devc->samp_buffered);
 
 			/* Avoid the corner case where the chunk ended at
 			 * exactly the trigger point. */
 			if (num_samples > pre)
-				send_chunk(ctx, transfer->buffer + pre * 2,
+				send_chunk(sdi, transfer->buffer + pre * 2,
 						num_samples - pre);
 		}
 	} else {
 		/* Already past the trigger point, just send it all out. */
-		send_chunk(ctx, transfer->buffer,
+		send_chunk(sdi, transfer->buffer,
 				num_samples);
 	}
 
-	ctx->samp_received += num_samples;
+	devc->samp_received += num_samples;
 
 	/* Everything in this transfer was either copied to the buffer or
 	 * sent to the session bus. */
 	g_free(transfer->buffer);
 	libusb_free_transfer(transfer);
 
-	if (ctx->samp_received >= ctx->framesize) {
+	if (devc->samp_received >= devc->framesize) {
 		/* That was the last chunk in this frame. Send the buffered
 		 * pre-trigger samples out now, in one big chunk. */
-		sr_dbg("hantek-dso: end of frame, sending %d pre-trigger buffered samples",
-				ctx->samp_buffered);
-		send_chunk(ctx, ctx->framebuf, ctx->samp_buffered);
+		sr_dbg("End of frame, sending %d pre-trigger buffered samples.",
+			   devc->samp_buffered);
+		send_chunk(sdi, devc->framebuf, devc->samp_buffered);
 
 		/* Mark the end of this frame. */
 		packet.type = SR_DF_FRAME_END;
-		sr_session_send(ctx->cb_data, &packet);
+		sr_session_send(devc->cb_data, &packet);
 
-		if (ctx->limit_frames && ++ctx->num_frames == ctx->limit_frames) {
+		if (devc->limit_frames && ++devc->num_frames == devc->limit_frames) {
 			/* Terminate session */
-			/* TODO: don't leave pending USB transfers hanging */
-			packet.type = SR_DF_END;
-			sr_session_send(ctx->cb_data, &packet);
+			devc->dev_state = STOPPING;
 		} else {
-			ctx->dev_state = NEW_CAPTURE;
+			devc->dev_state = NEW_CAPTURE;
 		}
 	}
-
 }
 
 static int handle_event(int fd, int revents, void *cb_data)
 {
+	const struct sr_dev_inst *sdi;
 	struct sr_datafeed_packet packet;
 	struct timeval tv;
-	struct context *ctx;
-	int num_probes;
+	struct dev_context *devc;
+	struct drv_context *drvc = di->priv;
+	int num_channels;
 	uint32_t trigger_offset;
 	uint8_t capturestate;
 
-	/* Avoid compiler warnings. */
 	(void)fd;
 	(void)revents;
 
+	sdi = cb_data;
+	devc = sdi->priv;
+	if (devc->dev_state == STOPPING) {
+		/* We've been told to wind up the acquisition. */
+		sr_dbg("Stopping acquisition.");
+		/*
+		 * TODO: Doesn't really cancel pending transfers so they might
+		 * come in after SR_DF_END is sent.
+		 */
+		usb_source_remove(sdi->session, drvc->sr_ctx);
+
+		packet.type = SR_DF_END;
+		sr_session_send(sdi, &packet);
+
+		devc->dev_state = IDLE;
+
+		return TRUE;
+	}
+
 	/* Always handle pending libusb events. */
 	tv.tv_sec = tv.tv_usec = 0;
-	libusb_handle_events_timeout(usb_context, &tv);
+	libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
 
-	ctx = cb_data;
 	/* TODO: ugh */
-	if (ctx->dev_state == NEW_CAPTURE) {
-		if (dso_capture_start(ctx) != SR_OK)
+	if (devc->dev_state == NEW_CAPTURE) {
+		if (dso_capture_start(sdi) != SR_OK)
 			return TRUE;
-		if (dso_enable_trigger(ctx) != SR_OK)
+		if (dso_enable_trigger(sdi) != SR_OK)
 			return TRUE;
-//		if (dso_force_trigger(ctx) != SR_OK)
+//		if (dso_force_trigger(sdi) != SR_OK)
 //			return TRUE;
-		sr_dbg("hantek-dso: successfully requested next chunk");
-		ctx->dev_state = CAPTURE;
+		sr_dbg("Successfully requested next chunk.");
+		devc->dev_state = CAPTURE;
 		return TRUE;
 	}
-	if (ctx->dev_state != CAPTURE)
+	if (devc->dev_state != CAPTURE)
 		return TRUE;
 
-	if ((dso_get_capturestate(ctx, &capturestate, &trigger_offset)) != SR_OK)
+	if ((dso_get_capturestate(sdi, &capturestate, &trigger_offset)) != SR_OK)
 		return TRUE;
 
-	sr_dbg("hantek-dso: capturestate %d", capturestate);
-	sr_dbg("hantek-dso: trigger offset 0x%.6x", trigger_offset);
+	sr_dbg("Capturestate %d.", capturestate);
+	sr_dbg("Trigger offset 0x%.6x.", trigger_offset);
 	switch (capturestate) {
 	case CAPTURE_EMPTY:
-		if (++ctx->capture_empty_count >= MAX_CAPTURE_EMPTY) {
-			ctx->capture_empty_count = 0;
-			if (dso_capture_start(ctx) != SR_OK)
+		if (++devc->capture_empty_count >= MAX_CAPTURE_EMPTY) {
+			devc->capture_empty_count = 0;
+			if (dso_capture_start(sdi) != SR_OK)
 				break;
-			if (dso_enable_trigger(ctx) != SR_OK)
+			if (dso_enable_trigger(sdi) != SR_OK)
 				break;
-//			if (dso_force_trigger(ctx) != SR_OK)
+//			if (dso_force_trigger(sdi) != SR_OK)
 //				break;
-			sr_dbg("hantek-dso: successfully requested next chunk");
+			sr_dbg("Successfully requested next chunk.");
 		}
 		break;
 	case CAPTURE_FILLING:
-		/* no data yet */
+		/* No data yet. */
 		break;
 	case CAPTURE_READY_8BIT:
 		/* Remember where in the captured frame the trigger is. */
-		ctx->trigger_offset = trigger_offset;
+		devc->trigger_offset = trigger_offset;
 
-		num_probes = (ctx->ch1_enabled && ctx->ch2_enabled) ? 2 : 1;
-		ctx->framebuf = g_try_malloc(ctx->framesize * num_probes * 2);
-		ctx->samp_buffered = ctx->samp_received = 0;
+		num_channels = (devc->ch1_enabled && devc->ch2_enabled) ? 2 : 1;
+		/* TODO: Check malloc return value. */
+		devc->framebuf = g_try_malloc(devc->framesize * num_channels * 2);
+		devc->samp_buffered = devc->samp_received = 0;
 
 		/* Tell the scope to send us the first frame. */
-		if (dso_get_channeldata(ctx, receive_transfer) != SR_OK)
+		if (dso_get_channeldata(sdi, receive_transfer) != SR_OK)
 			break;
 
-		/* Don't hit the state machine again until we're done fetching
+		/*
+		 * Don't hit the state machine again until we're done fetching
 		 * the data we just told the scope to send.
 		 */
-		ctx->dev_state = FETCH_DATA;
+		devc->dev_state = FETCH_DATA;
 
 		/* Tell the frontend a new frame is on the way. */
 		packet.type = SR_DF_FRAME_BEGIN;
-		sr_session_send(cb_data, &packet);
+		sr_session_send(sdi, &packet);
 		break;
 	case CAPTURE_READY_9BIT:
 		/* TODO */
-		sr_err("not yet supported");
+		sr_err("Not yet supported.");
 		break;
 	case CAPTURE_TIMEOUT:
 		/* Doesn't matter, we'll try again next time. */
 		break;
 	default:
-		sr_dbg("unknown capture state");
+		sr_dbg("Unknown capture state: %d.", capturestate);
+		break;
 	}
 
 	return TRUE;
 }
 
-static int hw_dev_acquisition_start(int dev_index, void *cb_data)
+static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 {
-	const struct libusb_pollfd **lupfd;
-	struct sr_datafeed_packet packet;
-	struct sr_datafeed_header header;
-	struct sr_datafeed_meta_analog meta;
-	struct sr_dev_inst *sdi;
-	struct context *ctx;
-	int i;
-
-	if (!(sdi = sr_dev_inst_get(hdi->instances, dev_index)))
-		return SR_ERR;
+	struct dev_context *devc;
+	struct drv_context *drvc = di->priv;
 
 	if (sdi->status != SR_ST_ACTIVE)
-		return SR_ERR;
+		return SR_ERR_DEV_CLOSED;
 
-	ctx = sdi->priv;
-	ctx->cb_data = cb_data;
+	devc = sdi->priv;
+	devc->cb_data = cb_data;
 
-	if (dso_init(ctx) != SR_OK)
+	if (configure_channels(sdi) != SR_OK) {
+		sr_err("Failed to configure channels.");
 		return SR_ERR;
+	}
 
-	if (dso_capture_start(ctx) != SR_OK)
+	if (dso_init(sdi) != SR_OK)
 		return SR_ERR;
 
-	ctx->dev_state = CAPTURE;
-	lupfd = libusb_get_pollfds(usb_context);
-	for (i = 0; lupfd[i]; i++)
-		sr_source_add(lupfd[i]->fd, lupfd[i]->events, TICK, handle_event,
-			      ctx);
-	free(lupfd);
+	if (dso_capture_start(sdi) != SR_OK)
+		return SR_ERR;
+
+	devc->dev_state = CAPTURE;
+	usb_source_add(sdi->session, drvc->sr_ctx, TICK, handle_event, (void *)sdi);
 
 	/* Send header packet to the session bus. */
-	packet.type = SR_DF_HEADER;
-	packet.payload = (unsigned char *)&header;
-	header.feed_version = 1;
-	gettimeofday(&header.starttime, NULL);
-	sr_session_send(cb_data, &packet);
-
-	/* Send metadata about the SR_DF_ANALOG packets to come. */
-	packet.type = SR_DF_META_ANALOG;
-	packet.payload = &meta;
-	meta.num_probes = NUM_PROBES;
-	sr_session_send(cb_data, &packet);
+	std_session_send_df_header(cb_data, LOG_PREFIX);
 
 	return SR_OK;
 }
 
-/* TODO: doesn't really cancel pending transfers so they might come in after
- * SR_DF_END is sent.
- */
-static int hw_dev_acquisition_stop(int dev_index, void *cb_data)
+static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 {
-	struct sr_datafeed_packet packet;
-	struct sr_dev_inst *sdi;
-	struct context *ctx;
+	struct dev_context *devc;
 
-	if (!(sdi = sr_dev_inst_get(hdi->instances, dev_index)))
-		return SR_ERR;
+	(void)cb_data;
 
 	if (sdi->status != SR_ST_ACTIVE)
 		return SR_ERR;
 
-	ctx = sdi->priv;
-	ctx->dev_state = IDLE;
-
-	packet.type = SR_DF_END;
-	sr_session_send(cb_data, &packet);
+	devc = sdi->priv;
+	devc->dev_state = STOPPING;
 
 	return SR_OK;
 }
@@ -873,15 +960,17 @@ SR_PRIV struct sr_dev_driver hantek_dso_driver_info = {
 	.name = "hantek-dso",
 	.longname = "Hantek DSO",
 	.api_version = 1,
-	.init = hw_init,
-	.cleanup = hw_cleanup,
-	.scan = hw_scan,
-	.dev_open = hw_dev_open,
-	.dev_close = hw_dev_close,
-	.info_get = hw_info_get,
-	.dev_status_get = hw_dev_status_get,
-	.dev_config_set = hw_dev_config_set,
-	.dev_acquisition_start = hw_dev_acquisition_start,
-	.dev_acquisition_stop = hw_dev_acquisition_stop,
-	.instances = NULL,
+	.init = init,
+	.cleanup = cleanup,
+	.scan = scan,
+	.dev_list = 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,
+	.priv = NULL,
 };