[libsigrok.git] / hardware / hantek-dso / api.c

/*
 * This file is part of the sigrok project.
 *
 * Copyright (C) 2012 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 <stdint.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <sys/time.h>
#include <inttypes.h>
#include <arpa/inet.h>
#include <glib.h>
#include <libusb.h>
#include "sigrok.h"
#include "sigrok-internal.h"
#include "config.h"
#include "dso.h"


/* Max time in ms before we want to check on events */
#define TICK    1

static int capabilities[] = {
	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,
	0,
};

static const char *probe_names[] = {
	"CH1",
	"CH2",
	NULL,
};

static struct dso_profile dev_profiles[] = {
	{	0x04b4, 0x2090,
		0x04b5, 0x2090,
		"Hantek", "DSO-2090",
		NULL, 2,
		FIRMWARE_DIR "/hantek-dso-2090.fw" },
	{ 0, 0, 0, 0, 0, 0, 0, 0, 0 }
};

static uint64_t buffersizes[] = {
	10240,
	32768,
	/* TODO: 65535 */
	0
};

static struct sr_rational timebases[] = {
	/* microseconds */
	{ 10, 1000000 },
	{ 20, 1000000 },
	{ 40, 1000000 },
	{ 100, 1000000 },
	{ 200, 1000000 },
	{ 400, 1000000 },
	/* milliseconds */
	{ 1, 1000 },
	{ 2, 1000 },
	{ 4, 1000 },
	{ 10, 1000 },
	{ 20, 1000 },
	{ 40, 1000 },
	{ 100, 1000 },
	{ 200, 1000 },
	{ 400, 1000 },
	{0,0}
};

static struct sr_rational vdivs[] = {
	/* millivolts */
	{ 10, 1000 },
	{ 20, 1000 },
	{ 50, 1000 },
	{ 100, 1000 },
	{ 200, 1000 },
	{ 500, 1000 },
	/* volts */
	{ 1, 1 },
	{ 2, 1 },
	{ 5, 1 },
	{0,0}
};

static char *trigger_sources[] = {
	"CH1",
	"CH2",
	"EXT",
	NULL
};

static char *filter_targets[] = {
	"CH1",
	"CH2",
	/* TODO: "TRIGGER", */
	NULL
};

SR_PRIV libusb_context *usb_context = NULL;
SR_PRIV GSList *dev_insts = NULL;


static struct sr_dev_inst *dso_dev_new(int index, struct dso_profile *prof)
{
	struct sr_dev_inst *sdi;
	struct context *ctx;

	sdi = sr_dev_inst_new(index, SR_ST_INITIALIZING,
		prof->vendor, prof->model, prof->model_version);
	if (!sdi)
		return NULL;

	if (!(ctx = g_try_malloc0(sizeof(struct context)))) {
		sr_err("hantek-dso: ctx 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;
	dev_insts = g_slist_append(dev_insts, sdi);

	return sdi;
}

static int configure_probes(struct context *ctx, GSList *probes)
{
	struct sr_probe *probe;
	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;
	}

	return SR_OK;
}

static int hw_init(const char *devinfo)
{
	struct sr_dev_inst *sdi;
	struct libusb_device_descriptor des;
	struct dso_profile *prof;
	struct context *ctx;
	libusb_device **devlist;
	int err, devcnt, i, j;

	/* Avoid compiler warnings. */
	(void)devinfo;

	if (libusb_init(&usb_context) != 0) {
		sr_err("hantek-dso: Failed to initialize USB.");
		return 0;
	}

	/* Find all Hantek DSO devices and upload firmware to all of them. */
	devcnt = 0;
	libusb_get_device_list(usb_context, &devlist);
	for (i = 0; devlist[i]; i++) {
		if ((err = libusb_get_device_descriptor(devlist[i], &des))) {
			sr_err("hantek-dso: failed to get device descriptor: %d", err);
			continue;
		}

		prof = NULL;
		for (j = 0; dev_profiles[j].orig_vid; j++) {
			if (des.idVendor == dev_profiles[j].orig_vid
				&& 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);
				sdi = dso_dev_new(devcnt, prof);
				ctx = sdi->priv;
				if (ezusb_upload_firmware(devlist[i], USB_CONFIGURATION,
						prof->firmware) == SR_OK)
					/* Remember when the firmware on this device was updated */
					g_get_current_time(&ctx->fw_updated);
				else
					sr_err("hantek-dso: firmware upload failed for "
					       "device %d", devcnt);
				/* Dummy USB address of 0xff will get overwritten later. */
				ctx->usb = sr_usb_dev_inst_new(
						libusb_get_bus_number(devlist[i]), 0xff, NULL);
				devcnt++;
				break;
			} else if (des.idVendor == dev_profiles[j].fw_vid
				&& 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);
				sdi = dso_dev_new(devcnt, prof);
				sdi->status = SR_ST_INACTIVE;
				ctx = sdi->priv;
				ctx->usb = sr_usb_dev_inst_new(
						libusb_get_bus_number(devlist[i]),
						libusb_get_device_address(devlist[i]), NULL);
				devcnt++;
				break;
			}
		}
		if (!prof)
			/* not a supported VID/PID */
			continue;
	}
	libusb_free_device_list(devlist, 1);

	return devcnt;
}

static int hw_dev_open(int dev_index)
{
	GTimeVal cur_time;
	struct sr_dev_inst *sdi;
	struct context *ctx;
	int timediff, err;

	if (!(sdi = sr_dev_inst_get(dev_insts, dev_index)))
		return SR_ERR_ARG;
	ctx = sdi->priv;

	/*
	 * if the firmware was recently uploaded, wait up to MAX_RENUM_DELAY ms
	 * for the FX2 to renumerate
	 */
	err = 0;
	if (GTV_TO_MSEC(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 */
		g_usleep(300 * 1000);
		timediff = 0;
		while (timediff < MAX_RENUM_DELAY) {
			if ((err = dso_open(dev_index)) == SR_OK)
				break;
			g_usleep(100 * 1000);
			g_get_current_time(&cur_time);
			timediff = GTV_TO_MSEC(cur_time) - GTV_TO_MSEC(ctx->fw_updated);
		}
		sr_info("hantek-dso: device came back after %d ms", timediff);
	} else {
		err = dso_open(dev_index);
	}

	if (err != SR_OK) {
		sr_err("hantek-dso: unable to open device");
		return SR_ERR;
	}

	err = libusb_claim_interface(ctx->usb->devhdl, USB_INTERFACE);
	if (err != 0) {
		sr_err("hantek-dso: Unable to claim interface: %d", err);
		return SR_ERR;
	}

	return SR_OK;
}

static int hw_dev_close(int dev_index)
{
	struct sr_dev_inst *sdi;

	if (!(sdi = sr_dev_inst_get(dev_insts, dev_index)))
		return SR_ERR_ARG;

	dso_close(sdi);

	return SR_OK;
}

static int hw_cleanup(void)
{
	GSList *l;
	struct sr_dev_inst *sdi;
	struct context *ctx;

	/* Properly close and free all devices. */
	for (l = dev_insts; 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);
	}

	g_slist_free(dev_insts);
	dev_insts = NULL;

	if (usb_context)
		libusb_exit(usb_context);
	usb_context = NULL;

	return SR_OK;
}

static void *hw_get_device_info(int dev_index, int dev_info_id)
{
	struct sr_dev_inst *sdi;
	struct context *ctx;
	void *info;
	uint64_t tmp;

	if (!(sdi = sr_dev_inst_get(dev_insts, dev_index)))
		return NULL;
	ctx = sdi->priv;

	info = NULL;
	switch (dev_info_id) {
	case SR_DI_INST:
		info = sdi;
		break;
	case SR_DI_NUM_PROBES:
		info = GINT_TO_POINTER(ctx->profile->num_probes);
		break;
	case SR_DI_PROBE_NAMES:
		info = probe_names;
		break;
	case SR_DI_BUFFERSIZES:
		info = buffersizes;
		break;
	case SR_DI_TIMEBASES:
		info = timebases;
		break;
	case SR_DI_TRIGGER_SOURCES:
		info = trigger_sources;
		break;
	case SR_DI_FILTERS:
		info = filter_targets;
		break;
	case SR_DI_VDIVS:
		info = vdivs;
		break;
	/* TODO remove this */
	case SR_DI_CUR_SAMPLERATE:
		info = &tmp;
		break;
	}

	return info;
}

static int hw_get_status(int device_index)
{
	struct sr_dev_inst *sdi;

	if (!(sdi = sr_dev_inst_get(dev_insts, device_index)))
		return SR_ST_NOT_FOUND;

	return sdi->status;
}

static int *hwcap_get_all(void)
{

	return capabilities;
}

static int hw_dev_config_set(int dev_index, int hwcap, void *value)
{
	struct sr_dev_inst *sdi;
	struct context *ctx;
	struct sr_rational tmp_rat;
	float tmp_float;
	uint64_t tmp_u64;
	int ret, i;
	char *tmp_str, **targets;

	if (!(sdi = sr_dev_inst_get(dev_insts, dev_index)))
		return SR_ERR;

	if (sdi->status != SR_ST_ACTIVE)
		return SR_ERR;

	ret = SR_OK;
	ctx = sdi->priv;
	switch (hwcap) {
	case SR_HWCAP_LIMIT_FRAMES:
		ctx->limit_frames = *(uint64_t *)value;
		break;
	case SR_HWCAP_PROBECONFIG:
		ret = configure_probes(ctx, (GSList *) value);
		break;
	case SR_HWCAP_TRIGGER_SLOPE:
		tmp_u64 = *(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 = *(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");
			ret = SR_ERR_ARG;
		} else
			ctx->triggerposition = tmp_float;
		break;
	case SR_HWCAP_BUFFERSIZE:
		tmp_u64 = *(int *)value;
		for (i = 0; buffersizes[i]; i++) {
			if (buffersizes[i] == tmp_u64) {
				ctx->framesize = tmp_u64;
				break;
			}
		}
		if (buffersizes[i] == 0)
			ret = SR_ERR_ARG;
		break;
	case SR_HWCAP_TIMEBASE:
		tmp_rat = *(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;
				break;
			}
		}
		if (timebases[i].p == 0 && timebases[i].q == 0)
			ret = SR_ERR_ARG;
		break;
	case SR_HWCAP_TRIGGER_SOURCE:
		tmp_str = value;
		for (i = 0; trigger_sources[i]; i++) {
			if (!strcmp(tmp_str, trigger_sources[i])) {
				ctx->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);
		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;
			else if (!strcmp(targets[i], "CH2"))
				ctx->filter_ch2 = TRUE;
			else if (!strcmp(targets[i], "TRIGGER"))
				ctx->filter_trigger = TRUE;
			else {
				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 = *(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;
				break;
			}
		}
		if (vdivs[i].p == 0 && vdivs[i].q == 0)
			ret = SR_ERR_ARG;
		break;
	default:
		ret = SR_ERR_ARG;
	}

	return ret;
}

/* 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
 * the libsigrok session bus.
 */
static void receive_transfer(struct libusb_transfer *transfer)
{
	struct sr_datafeed_packet packet;
	struct sr_datafeed_analog analog;
	struct context *ctx;
	float ch1, ch2;
	int num_probes, data_offset, i;

	ctx = transfer->user_data;
	sr_dbg("hantek-dso: receive_transfer(): status %d received %d bytes",
			transfer->status, transfer->actual_length);

	if (transfer->actual_length == 0)
		/* Nothing to send to the bus. */
		return;

	ctx->current_transfer += transfer->actual_length;
	sr_dbg("hantek-dso: got %d of %d in frame", ctx->current_transfer, ctx->framesize * 2);

	num_probes = (ctx->ch1_enabled && ctx->ch2_enabled) ? 2 : 1;
	packet.type = SR_DF_ANALOG;
	packet.payload = &analog;
	/* TODO: support for 5xxx series 9-bit samples */
	analog.num_samples = transfer->actual_length / 2;
	analog.data = g_try_malloc(analog.num_samples * sizeof(float) * num_probes);
	data_offset = 0;
	for (i = 0; i < analog.num_samples; i++) {
		/* 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.
		 */
		/* TODO: support for 5xxx series 9-bit samples */
		if (ctx->ch1_enabled) {
			ch1 = (*(transfer->buffer + i * 2 + 1) / 255.0);
			analog.data[data_offset++] = ch1;
		}
		if (ctx->ch2_enabled) {
			ch2 = (*(transfer->buffer + i * 2) / 255.0);
			analog.data[data_offset++] = ch2;
		}
	}
	g_free(transfer->buffer);
	libusb_free_transfer(transfer);
	sr_session_send(ctx->cb_data, &packet);

	if (ctx->current_transfer >= ctx->framesize * 2) {
		/* That's the last chunk in this frame. */
		packet.type = SR_DF_FRAME_END;
		sr_session_send(ctx->cb_data, &packet);

		if (ctx->limit_frames && ++ctx->num_frames == ctx->limit_frames) {
			/* Terminate session */
			/* TODO: don't leave pending USB transfers hanging */
			packet.type = SR_DF_END;
			sr_session_send(ctx->cb_data, &packet);
		} else {
			ctx->current_transfer = 0;
			ctx->dev_state = NEW_CAPTURE;
		}
	}

}

static int handle_event(int fd, int revents, void *cb_data)
{
	struct sr_datafeed_packet packet;
	struct timeval tv;
	struct context *ctx;
	int capturestate;

	/* Avoid compiler warnings. */
	(void)fd;
	(void)revents;

	/* Always handle pending libusb events. */
	tv.tv_sec = tv.tv_usec = 0;
	libusb_handle_events_timeout(usb_context, &tv);

	ctx = cb_data;
	/* TODO: ugh */
	if (ctx->dev_state == NEW_CAPTURE) {
		if (dso_capture_start(ctx) != SR_OK)
			return TRUE;
		if (dso_enable_trigger(ctx) != SR_OK)
			return TRUE;
//		if (dso_force_trigger(ctx) != SR_OK)
//			return TRUE;
		sr_dbg("hantek-dso: successfully requested next chunk");
		ctx->dev_state = CAPTURE;
		return TRUE;
	}
	if (ctx->dev_state != CAPTURE)
		return TRUE;

	if ((capturestate = dso_get_capturestate(ctx)) == CAPTURE_UNKNOWN) {
		/* Generated by the function, not the hardware. */
		return TRUE;
	}

	sr_dbg("hantek-dso: capturestate %d", capturestate);
	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)
				break;
			if (dso_enable_trigger(ctx) != SR_OK)
				break;
//			if (dso_force_trigger(ctx) != SR_OK)
//				break;
			sr_dbg("hantek-dso: successfully requested next chunk");
		}
		break;
	case CAPTURE_FILLING:
		/* no data yet */
		break;
	case CAPTURE_READY_8BIT:
		/* Tell the scope to send us the first frame. */
		if (dso_get_channeldata(ctx, receive_transfer) != SR_OK)
			break;

		/* 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;

		/* Tell the frontend a new frame is on the way. */
		packet.type = SR_DF_FRAME_BEGIN;
		sr_session_send(cb_data, &packet);
		break;
	case CAPTURE_READY_9BIT:
		/* TODO */
		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");
	}

	return TRUE;
}

static int hw_start_acquisition(int device_index, 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(dev_insts, device_index)))
		return SR_ERR;

	if (sdi->status != SR_ST_ACTIVE)
		return SR_ERR;

	ctx = sdi->priv;
	ctx->cb_data = cb_data;

	if (dso_init(ctx) != SR_OK)
		return SR_ERR;

	if (dso_capture_start(ctx) != 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);

	/* 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 = ctx->profile->num_probes;
	sr_session_send(cb_data, &packet);

	return SR_OK;
}

/* TODO: doesn't really cancel pending transfers so they might come in after
 * SR_DF_END is sent.
 */
static int hw_stop_acquisition(int device_index, gpointer session_device_id)
{
	struct sr_datafeed_packet packet;
	struct sr_dev_inst *sdi;
	struct context *ctx;

	if (!(sdi = sr_dev_inst_get(dev_insts, device_index)))
		return SR_ERR;

	if (sdi->status != SR_ST_ACTIVE)
		return SR_ERR;

	ctx = sdi->priv;
	ctx->dev_state = IDLE;

	packet.type = SR_DF_END;
	sr_session_send(session_device_id, &packet);

	return SR_OK;
}

SR_PRIV struct sr_dev_driver hantek_dso_plugin_info = {
	.name = "hantek-dso",
	.longname = "Hantek DSO",
	.api_version = 1,
	.init = hw_init,
	.cleanup = hw_cleanup,
	.dev_open = hw_dev_open,
	.dev_close = hw_dev_close,
	.dev_info_get = hw_get_device_info,
	.dev_status_get = hw_get_status,
	.hwcap_get_all = hwcap_get_all,
	.dev_config_set = hw_dev_config_set,
	.dev_acquisition_start = hw_start_acquisition,
	.dev_acquisition_stop = hw_stop_acquisition,
};
Commit	Line	Data
3b533202 BV	1	/*
	2	* This file is part of the sigrok project.
	3	*
	4	* Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
	5	*
	6	* This program is free software: you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation, either version 3 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	18	*/
	19
	20	#include <stdio.h>
	21	#include <stdint.h>
	22	#include <stdlib.h>
	23	#include <sys/types.h>
	24	#include <sys/stat.h>
	25	#include <fcntl.h>
	26	#include <unistd.h>
	27	#include <string.h>
	28	#include <sys/time.h>
	29	#include <inttypes.h>
	30	#include <arpa/inet.h>
	31	#include <glib.h>
	32	#include <libusb.h>
	33	#include "sigrok.h"
	34	#include "sigrok-internal.h"
	35	#include "config.h"
	36	#include "dso.h"
	37
	38
	39	/* Max time in ms before we want to check on events */
	40	#define TICK 1
	41
	42	static int capabilities[] = {
	43	SR_HWCAP_OSCILLOSCOPE,
ae88b97b	44	SR_HWCAP_LIMIT_SAMPLES,
3b533202	45	SR_HWCAP_CONTINUOUS,
a370ef19 BV	46	SR_HWCAP_TIMEBASE,
	47	SR_HWCAP_BUFFERSIZE,
	48	SR_HWCAP_TRIGGER_SOURCE,
	49	SR_HWCAP_TRIGGER_SLOPE,
	50	SR_HWCAP_HORIZ_TRIGGERPOS,
ebb781a6	51	SR_HWCAP_FILTER,
313deed2	52	SR_HWCAP_VDIV,
3b533202 BV	53	0,
	54	};
	55
	56	static const char *probe_names[] = {
	57	"CH1",
	58	"CH2",
	59	NULL,
	60	};
	61
	62	static struct dso_profile dev_profiles[] = {
	63	{ 0x04b4, 0x2090,
	64	0x04b5, 0x2090,
	65	"Hantek", "DSO-2090",
	66	NULL, 2,
	67	FIRMWARE_DIR "/hantek-dso-2090.fw" },
	68	{ 0, 0, 0, 0, 0, 0, 0, 0, 0 }
	69	};
	70
a370ef19 BV	71	static uint64_t buffersizes[] = {
	72	10240,
	73	32768,
	74	/* TODO: 65535 */
	75	0
	76	};
	77
	78	static struct sr_rational timebases[] = {
	79	/* microseconds */
	80	{ 10, 1000000 },
	81	{ 20, 1000000 },
	82	{ 40, 1000000 },
	83	{ 100, 1000000 },
	84	{ 200, 1000000 },
	85	{ 400, 1000000 },
	86	/* milliseconds */
	87	{ 1, 1000 },
	88	{ 2, 1000 },
	89	{ 4, 1000 },
	90	{ 10, 1000 },
	91	{ 20, 1000 },
	92	{ 40, 1000 },
	93	{ 100, 1000 },
	94	{ 200, 1000 },
	95	{ 400, 1000 },
	96	{0,0}
	97	};
	98
313deed2 BV	99	static struct sr_rational vdivs[] = {
	100	/* millivolts */
	101	{ 10, 1000 },
	102	{ 20, 1000 },
	103	{ 50, 1000 },
	104	{ 100, 1000 },
	105	{ 200, 1000 },
	106	{ 500, 1000 },
	107	/* volts */
	108	{ 1, 1 },
	109	{ 2, 1 },
	110	{ 5, 1 },
	111	{0,0}
	112	};
	113
a370ef19 BV	114	static char *trigger_sources[] = {
	115	"CH1",
	116	"CH2",
	117	"EXT",
	118	NULL
	119	};
3b533202	120
ebb781a6 BV	121	static char *filter_targets[] = {
	122	"CH1",
	123	"CH2",
	124	/* TODO: "TRIGGER", */
	125	NULL
	126	};
	127
3b533202 BV	128	SR_PRIV libusb_context *usb_context = NULL;
	129	SR_PRIV GSList *dev_insts = NULL;
	130
	131
	132	static struct sr_dev_inst dso_dev_new(int index, struct dso_profile prof)
	133	{
	134	struct sr_dev_inst *sdi;
	135	struct context *ctx;
	136
	137	sdi = sr_dev_inst_new(index, SR_ST_INITIALIZING,
	138	prof->vendor, prof->model, prof->model_version);
	139	if (!sdi)
	140	return NULL;
	141
	142	if (!(ctx = g_try_malloc0(sizeof(struct context)))) {
	143	sr_err("hantek-dso: ctx malloc failed");
	144	return NULL;
	145	}
	146	ctx->profile = prof;
	147	ctx->dev_state = IDLE;
	148	ctx->timebase = DEFAULT_TIMEBASE;
	149	ctx->ch1_enabled = TRUE;
	150	ctx->ch2_enabled = TRUE;
	151	ctx->voltage_ch1 = DEFAULT_VOLTAGE;
	152	ctx->voltage_ch2 = DEFAULT_VOLTAGE;
	153	ctx->coupling_ch1 = DEFAULT_COUPLING;
	154	ctx->coupling_ch2 = DEFAULT_COUPLING;
	155	ctx->voffset_ch1 = DEFAULT_VERT_OFFSET;
	156	ctx->voffset_ch2 = DEFAULT_VERT_OFFSET;
	157	ctx->voffset_trigger = DEFAULT_VERT_TRIGGERPOS;
3b533202 BV	158	ctx->framesize = DEFAULT_FRAMESIZE;
3b533202 BV	159	ctx->triggerslope = SLOPE_POSITIVE;
a370ef19	160	ctx->triggersource = g_strdup(DEFAULT_TRIGGER_SOURCE);
3b533202 BV	161	ctx->triggerposition = DEFAULT_HORIZ_TRIGGERPOS;
	162	sdi->priv = ctx;
	163	dev_insts = g_slist_append(dev_insts, sdi);
	164
	165	return sdi;
	166	}
	167
	168	static int configure_probes(struct context ctx, GSList probes)
	169	{
	170	struct sr_probe *probe;
	171	GSList *l;
	172
6e71ef3b	173	ctx->ch1_enabled = ctx->ch2_enabled = FALSE;
3b533202 BV	174	for (l = probes; l; l = l->next) {
3b533202 BV	175	probe = (struct sr_probe *)l->data;
6e71ef3b	176	if (probe->index == 1)
3b533202	177	ctx->ch1_enabled = probe->enabled;
6e71ef3b	178	else if (probe->index == 2)
3b533202 BV	179	ctx->ch2_enabled = probe->enabled;
	180	}
	181
	182	return SR_OK;
	183	}
	184
	185	static int hw_init(const char *devinfo)
	186	{
	187	struct sr_dev_inst *sdi;
	188	struct libusb_device_descriptor des;
	189	struct dso_profile *prof;
	190	struct context *ctx;
	191	libusb_device **devlist;
	192	int err, devcnt, i, j;
	193
	194	/* Avoid compiler warnings. */
	195	(void)devinfo;
	196
	197	if (libusb_init(&usb_context) != 0) {
	198	sr_err("hantek-dso: Failed to initialize USB.");
	199	return 0;
	200	}
	201
	202	/* Find all Hantek DSO devices and upload firmware to all of them. */
	203	devcnt = 0;
	204	libusb_get_device_list(usb_context, &devlist);
	205	for (i = 0; devlist[i]; i++) {
	206	if ((err = libusb_get_device_descriptor(devlist[i], &des))) {
	207	sr_err("hantek-dso: failed to get device descriptor: %d", err);
	208	continue;
	209	}
	210
	211	prof = NULL;
	212	for (j = 0; dev_profiles[j].orig_vid; j++) {
	213	if (des.idVendor == dev_profiles[j].orig_vid
	214	&& des.idProduct == dev_profiles[j].orig_pid) {
	215	/* Device matches the pre-firmware profile. */
	216	prof = &dev_profiles[j];
	217	sr_dbg("hantek-dso: Found a %s %s.", prof->vendor, prof->model);
	218	sdi = dso_dev_new(devcnt, prof);
	219	ctx = sdi->priv;
	220	if (ezusb_upload_firmware(devlist[i], USB_CONFIGURATION,
	221	prof->firmware) == SR_OK)
	222	/* Remember when the firmware on this device was updated */
	223	g_get_current_time(&ctx->fw_updated);
	224	else
	225	sr_err("hantek-dso: firmware upload failed for "
	226	"device %d", devcnt);
	227	/* Dummy USB address of 0xff will get overwritten later. */
	228	ctx->usb = sr_usb_dev_inst_new(
	229	libusb_get_bus_number(devlist[i]), 0xff, NULL);
	230	devcnt++;
	231	break;
	232	} else if (des.idVendor == dev_profiles[j].fw_vid
	233	&& des.idProduct == dev_profiles[j].fw_pid) {
	234	/* Device matches the post-firmware profile. */
	235	prof = &dev_profiles[j];
	236	sr_dbg("hantek-dso: Found a %s %s.", prof->vendor, prof->model);
	237	sdi = dso_dev_new(devcnt, prof);
	238	sdi->status = SR_ST_INACTIVE;
	239	ctx = sdi->priv;
	240	ctx->usb = sr_usb_dev_inst_new(
	241	libusb_get_bus_number(devlist[i]),
	242	libusb_get_device_address(devlist[i]), NULL);
243	devcnt++;
244	break;
245	}
246	}
247	if (!prof)
248	/* not a supported VID/PID */
249	continue;
250	}
251	libusb_free_device_list(devlist, 1);
252
253	return devcnt;
254	}
255
256	static int hw_dev_open(int dev_index)
257	{
258	GTimeVal cur_time;
259	struct sr_dev_inst *sdi;
260	struct context *ctx;
261	int timediff, err;
262
263	if (!(sdi = sr_dev_inst_get(dev_insts, dev_index)))
264	return SR_ERR_ARG;
265	ctx = sdi->priv;
266
267	/*
268	* if the firmware was recently uploaded, wait up to MAX_RENUM_DELAY ms
269	* for the FX2 to renumerate
270	*/
271	err = 0;
272	if (GTV_TO_MSEC(ctx->fw_updated) > 0) {
273	sr_info("hantek-dso: waiting for device to reset");
274	/* takes at least 300ms for the FX2 to be gone from the USB bus */
275	g_usleep(300 * 1000);
276	timediff = 0;
277	while (timediff < MAX_RENUM_DELAY) {
278	if ((err = dso_open(dev_index)) == SR_OK)
279	break;
280	g_usleep(100 * 1000);
281	g_get_current_time(&cur_time);
282	timediff = GTV_TO_MSEC(cur_time) - GTV_TO_MSEC(ctx->fw_updated);
283	}
284	sr_info("hantek-dso: device came back after %d ms", timediff);
285	} else {
286	err = dso_open(dev_index);
287	}
288
289	if (err != SR_OK) {
290	sr_err("hantek-dso: unable to open device");
291	return SR_ERR;
292	}
293
294	err = libusb_claim_interface(ctx->usb->devhdl, USB_INTERFACE);
295	if (err != 0) {
296	sr_err("hantek-dso: Unable to claim interface: %d", err);
297	return SR_ERR;
298	}
299
300	return SR_OK;
301	}
302
303	static int hw_dev_close(int dev_index)
304	{
305	struct sr_dev_inst *sdi;
306
307	if (!(sdi = sr_dev_inst_get(dev_insts, dev_index)))
308	return SR_ERR_ARG;
309
310	dso_close(sdi);
311
312	return SR_OK;
313	}
314
315	static int hw_cleanup(void)
316	{
317	GSList *l;
318	struct sr_dev_inst *sdi;
319	struct context *ctx;
320
321	/* Properly close and free all devices. */
322	for (l = dev_insts; l; l = l->next) {
323	if (!(sdi = l->data)) {
324	/* Log error, but continue cleaning up the rest. */
325	sr_err("hantek-dso: %s: sdi was NULL, continuing", __func__);
326	continue;
327	}
328	if (!(ctx = sdi->priv)) {
329	/* Log error, but continue cleaning up the rest. */
330	sr_err("hantek-dso: %s: sdi->priv was NULL, continuing", __func__);
331	continue;
332	}
333	dso_close(sdi);
334	sr_usb_dev_inst_free(ctx->usb);
a370ef19 BV	335	g_free(ctx->triggersource);
a370ef19 BV	336
3b533202 BV	337	sr_dev_inst_free(sdi);
	338	}
	339
	340	g_slist_free(dev_insts);
	341	dev_insts = NULL;
	342
	343	if (usb_context)
	344	libusb_exit(usb_context);
	345	usb_context = NULL;
	346
	347	return SR_OK;
	348	}
	349
	350	static void *hw_get_device_info(int dev_index, int dev_info_id)
	351	{
	352	struct sr_dev_inst *sdi;
	353	struct context *ctx;
	354	void *info;
	355	uint64_t tmp;
	356
	357	if (!(sdi = sr_dev_inst_get(dev_insts, dev_index)))
	358	return NULL;
	359	ctx = sdi->priv;
	360
	361	info = NULL;
	362	switch (dev_info_id) {
	363	case SR_DI_INST:
	364	info = sdi;
	365	break;
	366	case SR_DI_NUM_PROBES:
	367	info = GINT_TO_POINTER(ctx->profile->num_probes);
	368	break;
	369	case SR_DI_PROBE_NAMES:
	370	info = probe_names;
	371	break;
a370ef19 BV	372	case SR_DI_BUFFERSIZES:
	373	info = buffersizes;
	374	break;
	375	case SR_DI_TIMEBASES:
	376	info = timebases;
	377	break;
	378	case SR_DI_TRIGGER_SOURCES:
	379	info = trigger_sources;
	380	break;
ebb781a6 BV	381	case SR_DI_FILTERS:
	382	info = filter_targets;
	383	break;
313deed2 BV	384	case SR_DI_VDIVS:
	385	info = vdivs;
	386	break;
3b533202 BV	387	/* TODO remove this */
	388	case SR_DI_CUR_SAMPLERATE:
	389	info = &tmp;
	390	break;
	391	}
	392
	393	return info;
	394	}
	395
	396	static int hw_get_status(int device_index)
	397	{
	398	struct sr_dev_inst *sdi;
	399
	400	if (!(sdi = sr_dev_inst_get(dev_insts, device_index)))
	401	return SR_ST_NOT_FOUND;
	402
	403	return sdi->status;
	404	}
	405
	406	static int *hwcap_get_all(void)
	407	{
	408
	409	return capabilities;
	410	}
	411
	412	static int hw_dev_config_set(int dev_index, int hwcap, void *value)
	413	{
	414	struct sr_dev_inst *sdi;
	415	struct context *ctx;
a370ef19 BV	416	struct sr_rational tmp_rat;
	417	float tmp_float;
	418	uint64_t tmp_u64;
	419	int ret, i;
ebb781a6	420	char tmp_str, *targets;
3b533202 BV	421
	422	if (!(sdi = sr_dev_inst_get(dev_insts, dev_index)))
	423	return SR_ERR;
	424
	425	if (sdi->status != SR_ST_ACTIVE)
	426	return SR_ERR;
	427
a370ef19	428	ret = SR_OK;
3b533202 BV	429	ctx = sdi->priv;
3b533202 BV	430	switch (hwcap) {
ae88b97b BV	431	case SR_HWCAP_LIMIT_FRAMES:
	432	ctx->limit_frames = (uint64_t )value;
	433	break;
3b533202 BV	434	case SR_HWCAP_PROBECONFIG:
	435	ret = configure_probes(ctx, (GSList *) value);
	436	break;
a370ef19 BV	437	case SR_HWCAP_TRIGGER_SLOPE:
	438	tmp_u64 = (int )value;
	439	if (tmp_u64 != SLOPE_NEGATIVE && tmp_u64 != SLOPE_POSITIVE)
	440	ret = SR_ERR_ARG;
	441	ctx->triggerslope = tmp_u64;
	442	break;
	443	case SR_HWCAP_HORIZ_TRIGGERPOS:
	444	tmp_float = (float )value;
	445	if (tmp_float < 0.0 \|\| tmp_float > 1.0) {
	446	sr_err("hantek-dso: trigger position should be between 0.0 and 1.0");
3b533202	447	ret = SR_ERR_ARG;
a370ef19 BV	448	} else
	449	ctx->triggerposition = tmp_float;
	450	break;
	451	case SR_HWCAP_BUFFERSIZE:
	452	tmp_u64 = (int )value;
	453	for (i = 0; buffersizes[i]; i++) {
	454	if (buffersizes[i] == tmp_u64) {
	455	ctx->framesize = tmp_u64;
	456	break;
	457	}
	458	}
	459	if (buffersizes[i] == 0)
	460	ret = SR_ERR_ARG;
	461	break;
	462	case SR_HWCAP_TIMEBASE:
	463	tmp_rat = (struct sr_rational )value;
	464	for (i = 0; timebases[i].p && timebases[i].q; i++) {
	465	if (timebases[i].p == tmp_rat.p
	466	&& timebases[i].q == tmp_rat.q) {
	467	ctx->timebase = i;
	468	break;
	469	}
	470	}
	471	if (timebases[i].p == 0 && timebases[i].q == 0)
	472	ret = SR_ERR_ARG;
	473	break;
	474	case SR_HWCAP_TRIGGER_SOURCE:
	475	tmp_str = value;
	476	for (i = 0; trigger_sources[i]; i++) {
	477	if (!strcmp(tmp_str, trigger_sources[i])) {
	478	ctx->triggersource = g_strdup(tmp_str);
	479	break;
	480	}
	481	}
	482	if (trigger_sources[i] == 0)
	483	ret = SR_ERR_ARG;
	484	break;
ebb781a6 BV	485	case SR_HWCAP_FILTER:
	486	ctx->filter_ch1 = ctx->filter_ch2 = ctx->filter_trigger = 0;
	487	targets = g_strsplit(value, ",", 0);
	488	for (i = 0; targets[i]; i++) {
	489	if (targets[i] == '\0')
	490	/* Empty filter string can be used to clear them all. */
	491	;
	492	else if (!strcmp(targets[i], "CH1"))
	493	ctx->filter_ch1 = TRUE;
	494	else if (!strcmp(targets[i], "CH2"))
	495	ctx->filter_ch2 = TRUE;
	496	else if (!strcmp(targets[i], "TRIGGER"))
	497	ctx->filter_trigger = TRUE;
	498	else {
	499	sr_err("invalid filter target %s", targets[i]);
	500	ret = SR_ERR_ARG;
	501	}
	502	}
	503	g_strfreev(targets);
	504	break;
313deed2 BV	505	case SR_HWCAP_VDIV:
	506	/* TODO not supporting vdiv per channel yet */
	507	tmp_rat = (struct sr_rational )value;
	508	for (i = 0; vdivs[i].p && vdivs[i].q; i++) {
	509	if (vdivs[i].p == tmp_rat.p
	510	&& vdivs[i].q == tmp_rat.q) {
	511	ctx->voltage_ch1 = i;
	512	ctx->voltage_ch2 = i;
	513	break;
	514	}
	515	}
	516	if (vdivs[i].p == 0 && vdivs[i].q == 0)
	517	ret = SR_ERR_ARG;
	518	break;
3b533202 BV	519	default:
	520	ret = SR_ERR_ARG;
	521	}
	522
	523	return ret;
	524	}
	525
	526	/* Called by libusb (as triggered by handle_event()) when a transfer comes in.
	527	* Only channel data comes in asynchronously, and all transfers for this are
	528	* queued up beforehand, so this just needs so chuck the incoming data onto
	529	* the libsigrok session bus.
	530	*/
	531	static void receive_transfer(struct libusb_transfer *transfer)
	532	{
	533	struct sr_datafeed_packet packet;
	534	struct sr_datafeed_analog analog;
	535	struct context *ctx;
	536	float ch1, ch2;
6e71ef3b	537	int num_probes, data_offset, i;
3b533202 BV	538
	539	ctx = transfer->user_data;
	540	sr_dbg("hantek-dso: receive_transfer(): status %d received %d bytes",
	541	transfer->status, transfer->actual_length);
	542
	543	if (transfer->actual_length == 0)
	544	/* Nothing to send to the bus. */
	545	return;
	546
	547	ctx->current_transfer += transfer->actual_length;
	548	sr_dbg("hantek-dso: got %d of %d in frame", ctx->current_transfer, ctx->framesize * 2);
3b533202	549
6e71ef3b	550	num_probes = (ctx->ch1_enabled && ctx->ch2_enabled) ? 2 : 1;
3b533202 BV	551	packet.type = SR_DF_ANALOG;
3b533202 BV	552	packet.payload = &analog;
6e71ef3b	553	/* TODO: support for 5xxx series 9-bit samples */
3b533202	554	analog.num_samples = transfer->actual_length / 2;
6e71ef3b BV	555	analog.data = g_try_malloc(analog.num_samples * sizeof(float) * num_probes);
6e71ef3b BV	556	data_offset = 0;
3b533202	557	for (i = 0; i < analog.num_samples; i++) {
6e71ef3b BV	558	/* The device always sends data for both channels. If a channel
	559	* is disabled, it contains a copy of the enabled channel's
	560	* data. However, we only send the requested channels to the bus.
	561	*/
3b533202	562	/* TODO: support for 5xxx series 9-bit samples */
6e71ef3b BV	563	if (ctx->ch1_enabled) {
	564	ch1 = ((transfer->buffer + i 2 + 1) / 255.0);
	565	analog.data[data_offset++] = ch1;
	566	}
	567	if (ctx->ch2_enabled) {
	568	ch2 = ((transfer->buffer + i 2) / 255.0);
	569	analog.data[data_offset++] = ch2;
	570	}
3b533202 BV	571	}
	572	g_free(transfer->buffer);
	573	libusb_free_transfer(transfer);
3b533202 BV	574	sr_session_send(ctx->cb_data, &packet);
3b533202 BV	575
ae88b97b BV	576	if (ctx->current_transfer >= ctx->framesize * 2) {
	577	/* That's the last chunk in this frame. */
	578	packet.type = SR_DF_FRAME_END;
	579	sr_session_send(ctx->cb_data, &packet);
	580
	581	if (ctx->limit_frames && ++ctx->num_frames == ctx->limit_frames) {
	582	/* Terminate session */
6e71ef3b	583	/* TODO: don't leave pending USB transfers hanging */
ae88b97b BV	584	packet.type = SR_DF_END;
	585	sr_session_send(ctx->cb_data, &packet);
	586	} else {
	587	ctx->current_transfer = 0;
	588	ctx->dev_state = NEW_CAPTURE;
	589	}
	590	}
	591
3b533202 BV	592	}
	593
	594	static int handle_event(int fd, int revents, void *cb_data)
	595	{
ae88b97b	596	struct sr_datafeed_packet packet;
3b533202 BV	597	struct timeval tv;
	598	struct context *ctx;
	599	int capturestate;
	600
	601	/* Avoid compiler warnings. */
	602	(void)fd;
	603	(void)revents;
	604
	605	/* Always handle pending libusb events. */
	606	tv.tv_sec = tv.tv_usec = 0;
	607	libusb_handle_events_timeout(usb_context, &tv);
	608
	609	ctx = cb_data;
	610	/* TODO: ugh */
	611	if (ctx->dev_state == NEW_CAPTURE) {
	612	if (dso_capture_start(ctx) != SR_OK)
	613	return TRUE;
	614	if (dso_enable_trigger(ctx) != SR_OK)
	615	return TRUE;
a370ef19 BV	616	// if (dso_force_trigger(ctx) != SR_OK)
a370ef19 BV	617	// return TRUE;
3b533202 BV	618	sr_dbg("hantek-dso: successfully requested next chunk");
	619	ctx->dev_state = CAPTURE;
	620	return TRUE;
	621	}
	622	if (ctx->dev_state != CAPTURE)
	623	return TRUE;
	624
	625	if ((capturestate = dso_get_capturestate(ctx)) == CAPTURE_UNKNOWN) {
	626	/* Generated by the function, not the hardware. */
	627	return TRUE;
	628	}
	629
	630	sr_dbg("hantek-dso: capturestate %d", capturestate);
	631	switch (capturestate) {
	632	case CAPTURE_EMPTY:
	633	if (++ctx->capture_empty_count >= MAX_CAPTURE_EMPTY) {
	634	ctx->capture_empty_count = 0;
	635	if (dso_capture_start(ctx) != SR_OK)
	636	break;
	637	if (dso_enable_trigger(ctx) != SR_OK)
	638	break;
a370ef19 BV	639	// if (dso_force_trigger(ctx) != SR_OK)
a370ef19 BV	640	// break;
3b533202 BV	641	sr_dbg("hantek-dso: successfully requested next chunk");
	642	}
	643	break;
	644	case CAPTURE_FILLING:
	645	/* no data yet */
	646	break;
	647	case CAPTURE_READY_8BIT:
	648	/* Tell the scope to send us the first frame. */
	649	if (dso_get_channeldata(ctx, receive_transfer) != SR_OK)
	650	break;
ae88b97b BV	651
	652	/* Don't hit the state machine again until we're done fetching
	653	* the data we just told the scope to send.
	654	*/
3b533202	655	ctx->dev_state = FETCH_DATA;
ae88b97b BV	656
	657	/* Tell the frontend a new frame is on the way. */
	658	packet.type = SR_DF_FRAME_BEGIN;
	659	sr_session_send(cb_data, &packet);
3b533202 BV	660	break;
	661	case CAPTURE_READY_9BIT:
	662	/* TODO */
	663	sr_err("not yet supported");
	664	break;
	665	case CAPTURE_TIMEOUT:
	666	/* Doesn't matter, we'll try again next time. */
	667	break;
	668	default:
	669	sr_dbg("unknown capture state");
	670	}
	671
	672	return TRUE;
	673	}
	674
	675	static int hw_start_acquisition(int device_index, void *cb_data)
	676	{
	677	const struct libusb_pollfd **lupfd;
	678	struct sr_datafeed_packet packet;
	679	struct sr_datafeed_header header;
	680	struct sr_datafeed_meta_analog meta;
	681	struct sr_dev_inst *sdi;
	682	struct context *ctx;
	683	int i;
	684
	685	if (!(sdi = sr_dev_inst_get(dev_insts, device_index)))
	686	return SR_ERR;
	687
	688	if (sdi->status != SR_ST_ACTIVE)
	689	return SR_ERR;
	690
	691	ctx = sdi->priv;
	692	ctx->cb_data = cb_data;
	693
	694	if (dso_init(ctx) != SR_OK)
	695	return SR_ERR;
	696
	697	if (dso_capture_start(ctx) != SR_OK)
	698	return SR_ERR;
	699
	700	ctx->dev_state = CAPTURE;
	701	lupfd = libusb_get_pollfds(usb_context);
	702	for (i = 0; lupfd[i]; i++)
	703	sr_source_add(lupfd[i]->fd, lupfd[i]->events, TICK, handle_event,
	704	ctx);
	705	free(lupfd);
	706
	707	/* Send header packet to the session bus. */
	708	packet.type = SR_DF_HEADER;
	709	packet.payload = (unsigned char *)&header;
	710	header.feed_version = 1;
	711	gettimeofday(&header.starttime, NULL);
	712	sr_session_send(cb_data, &packet);
	713
	714	/* Send metadata about the SR_DF_ANALOG packets to come. */
	715	packet.type = SR_DF_META_ANALOG;
	716	packet.payload = &meta;
	717	meta.num_probes = ctx->profile->num_probes;
	718	sr_session_send(cb_data, &packet);
	719
	720	return SR_OK;
	721	}
	722
	723	/* TODO: doesn't really cancel pending transfers so they might come in after
724	* SR_DF_END is sent.
725	*/
726	static int hw_stop_acquisition(int device_index, gpointer session_device_id)
727	{
728	struct sr_datafeed_packet packet;
729	struct sr_dev_inst *sdi;
730	struct context *ctx;
731
732	if (!(sdi = sr_dev_inst_get(dev_insts, device_index)))
733	return SR_ERR;
734
735	if (sdi->status != SR_ST_ACTIVE)
736	return SR_ERR;
737
738	ctx = sdi->priv;
739	ctx->dev_state = IDLE;
740
741	packet.type = SR_DF_END;
742	sr_session_send(session_device_id, &packet);
743
744	return SR_OK;
745	}
746
747	SR_PRIV struct sr_dev_driver hantek_dso_plugin_info = {
748	.name = "hantek-dso",
749	.longname = "Hantek DSO",
750	.api_version = 1,
751	.init = hw_init,
752	.cleanup = hw_cleanup,
753	.dev_open = hw_dev_open,
754	.dev_close = hw_dev_close,
755	.dev_info_get = hw_get_device_info,
756	.dev_status_get = hw_get_status,
757	.hwcap_get_all = hwcap_get_all,
758	.dev_config_set = hw_dev_config_set,
759	.dev_acquisition_start = hw_start_acquisition,
760	.dev_acquisition_stop = hw_stop_acquisition,
761	};