[libsigrok.git] / src / hardware / asix-sigma / api.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2010-2012 Håvard Espeland <gus@ping.uio.no>,
 * Copyright (C) 2010 Martin Stensgård <mastensg@ping.uio.no>
 * Copyright (C) 2010 Carl Henrik Lunde <chlunde@ping.uio.no>
 *
 * 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/>.
 */

/*
 * ASIX SIGMA/SIGMA2 logic analyzer driver
 */

#include <config.h>
#include "protocol.h"

SR_PRIV struct sr_dev_driver asix_sigma_driver_info;

/*
 * Channel numbers seem to go from 1-16, according to this image:
 * http://tools.asix.net/img/sigma_sigmacab_pins_720.jpg
 * (the cable has two additional GND pins, and a TI and TO pin)
 */
static const char *channel_names[] = {
	"1", "2", "3", "4", "5", "6", "7", "8",
	"9", "10", "11", "12", "13", "14", "15", "16",
};

static const uint32_t drvopts[] = {
	SR_CONF_LOGIC_ANALYZER,
};

static const uint32_t devopts[] = {
	SR_CONF_LIMIT_MSEC | SR_CONF_GET | SR_CONF_SET,
	SR_CONF_LIMIT_SAMPLES | SR_CONF_SET,
	SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
	SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
	SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET,
};

static const int32_t trigger_matches[] = {
	SR_TRIGGER_ZERO,
	SR_TRIGGER_ONE,
	SR_TRIGGER_RISING,
	SR_TRIGGER_FALLING,
};


static int dev_clear(const struct sr_dev_driver *di)
{
	return std_dev_clear(di, sigma_clear_helper);
}

static GSList *scan(struct sr_dev_driver *di, GSList *options)
{
	struct sr_dev_inst *sdi;
	struct drv_context *drvc;
	struct dev_context *devc;
	GSList *devices;
	struct ftdi_device_list *devlist;
	char serial_txt[10];
	uint32_t serial;
	int ret;
	unsigned int i;

	(void)options;

	drvc = di->context;

	devices = NULL;

	devc = g_malloc0(sizeof(struct dev_context));

	ftdi_init(&devc->ftdic);

	/* Look for SIGMAs. */

	if ((ret = ftdi_usb_find_all(&devc->ftdic, &devlist,
	    USB_VENDOR, USB_PRODUCT)) <= 0) {
		if (ret < 0)
			sr_err("ftdi_usb_find_all(): %d", ret);
		goto free;
	}

	/* Make sure it's a version 1 or 2 SIGMA. */
	ftdi_usb_get_strings(&devc->ftdic, devlist->dev, NULL, 0, NULL, 0,
			     serial_txt, sizeof(serial_txt));
	sscanf(serial_txt, "%x", &serial);

	if (serial < 0xa6010000 || serial > 0xa602ffff) {
		sr_err("Only SIGMA and SIGMA2 are supported "
		       "in this version of libsigrok.");
		goto free;
	}

	sr_info("Found ASIX SIGMA - Serial: %s", serial_txt);

	devc->cur_samplerate = samplerates[0];
	devc->period_ps = 0;
	devc->limit_msec = 0;
	devc->cur_firmware = -1;
	devc->num_channels = 0;
	devc->samples_per_event = 0;
	devc->capture_ratio = 50;
	devc->use_triggers = 0;

	/* Register SIGMA device. */
	sdi = g_malloc0(sizeof(struct sr_dev_inst));
	sdi->status = SR_ST_INITIALIZING;
	sdi->vendor = g_strdup(USB_VENDOR_NAME);
	sdi->model = g_strdup(USB_MODEL_NAME);
	sdi->driver = di;

	for (i = 0; i < ARRAY_SIZE(channel_names); i++)
		sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE, channel_names[i]);

	devices = g_slist_append(devices, sdi);
	drvc->instances = g_slist_append(drvc->instances, sdi);
	sdi->priv = devc;

	/* We will open the device again when we need it. */
	ftdi_list_free(&devlist);

	return devices;

free:
	ftdi_deinit(&devc->ftdic);
	g_free(devc);
	return NULL;
}

static int dev_open(struct sr_dev_inst *sdi)
{
	struct dev_context *devc;
	int ret;

	devc = sdi->priv;

	/* Make sure it's an ASIX SIGMA. */
	if ((ret = ftdi_usb_open_desc(&devc->ftdic,
		USB_VENDOR, USB_PRODUCT, USB_DESCRIPTION, NULL)) < 0) {

		sr_err("ftdi_usb_open failed: %s",
		       ftdi_get_error_string(&devc->ftdic));

		return 0;
	}

	sdi->status = SR_ST_ACTIVE;

	return SR_OK;
}

static int dev_close(struct sr_dev_inst *sdi)
{
	struct dev_context *devc;

	devc = sdi->priv;

	/* TODO */
	if (sdi->status == SR_ST_ACTIVE)
		ftdi_usb_close(&devc->ftdic);

	sdi->status = SR_ST_INACTIVE;

	return SR_OK;
}

static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
		const struct sr_channel_group *cg)
{
	struct dev_context *devc;

	(void)cg;

	if (!sdi)
		return SR_ERR;
	devc = sdi->priv;

	switch (key) {
	case SR_CONF_SAMPLERATE:
		*data = g_variant_new_uint64(devc->cur_samplerate);
		break;
	case SR_CONF_LIMIT_MSEC:
		*data = g_variant_new_uint64(devc->limit_msec);
		break;
	case SR_CONF_CAPTURE_RATIO:
		*data = g_variant_new_uint64(devc->capture_ratio);
		break;
	default:
		return SR_ERR_NA;
	}

	return SR_OK;
}

static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
		const struct sr_channel_group *cg)
{
	struct dev_context *devc;
	uint64_t tmp;
	int ret;

	(void)cg;

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

	devc = sdi->priv;

	ret = SR_OK;
	switch (key) {
	case SR_CONF_SAMPLERATE:
		ret = sigma_set_samplerate(sdi, g_variant_get_uint64(data));
		break;
	case SR_CONF_LIMIT_MSEC:
		tmp = g_variant_get_uint64(data);
		if (tmp > 0)
			devc->limit_msec = g_variant_get_uint64(data);
		else
			ret = SR_ERR;
		break;
	case SR_CONF_LIMIT_SAMPLES:
		tmp = g_variant_get_uint64(data);
		devc->limit_msec = tmp * 1000 / devc->cur_samplerate;
		break;
	case SR_CONF_CAPTURE_RATIO:
		tmp = g_variant_get_uint64(data);
		if (tmp <= 100)
			devc->capture_ratio = tmp;
		else
			ret = SR_ERR;
		break;
	default:
		ret = SR_ERR_NA;
	}

	return ret;
}

static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
		const struct sr_channel_group *cg)
{
	GVariant *gvar;
	GVariantBuilder gvb;

	(void)cg;

	switch (key) {
	case SR_CONF_DEVICE_OPTIONS:
		if (!sdi)
			*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
					drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
		else
			*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
					devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
		break;
	case SR_CONF_SAMPLERATE:
		g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
		gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), samplerates,
				SAMPLERATES_COUNT, sizeof(uint64_t));
		g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
		*data = g_variant_builder_end(&gvb);
		break;
	case SR_CONF_TRIGGER_MATCH:
		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
				trigger_matches, ARRAY_SIZE(trigger_matches),
				sizeof(int32_t));
		break;
	default:
		return SR_ERR_NA;
	}

	return SR_OK;
}

static int dev_acquisition_start(const struct sr_dev_inst *sdi)
{
	struct dev_context *devc;
	struct clockselect_50 clockselect;
	int frac, triggerpin, ret;
	uint8_t triggerselect = 0;
	struct triggerinout triggerinout_conf;
	struct triggerlut lut;

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

	devc = sdi->priv;

	if (sigma_convert_trigger(sdi) != SR_OK) {
		sr_err("Failed to configure triggers.");
		return SR_ERR;
	}

	/* If the samplerate has not been set, default to 200 kHz. */
	if (devc->cur_firmware == -1) {
		if ((ret = sigma_set_samplerate(sdi, SR_KHZ(200))) != SR_OK)
			return ret;
	}

	/* Enter trigger programming mode. */
	sigma_set_register(WRITE_TRIGGER_SELECT1, 0x20, devc);

	/* 100 and 200 MHz mode. */
	if (devc->cur_samplerate >= SR_MHZ(100)) {
		sigma_set_register(WRITE_TRIGGER_SELECT1, 0x81, devc);

		/* Find which pin to trigger on from mask. */
		for (triggerpin = 0; triggerpin < 8; triggerpin++)
			if ((devc->trigger.risingmask | devc->trigger.fallingmask) &
			    (1 << triggerpin))
				break;

		/* Set trigger pin and light LED on trigger. */
		triggerselect = (1 << LEDSEL1) | (triggerpin & 0x7);

		/* Default rising edge. */
		if (devc->trigger.fallingmask)
			triggerselect |= 1 << 3;

	/* All other modes. */
	} else if (devc->cur_samplerate <= SR_MHZ(50)) {
		sigma_build_basic_trigger(&lut, devc);

		sigma_write_trigger_lut(&lut, devc);

		triggerselect = (1 << LEDSEL1) | (1 << LEDSEL0);
	}

	/* Setup trigger in and out pins to default values. */
	memset(&triggerinout_conf, 0, sizeof(struct triggerinout));
	triggerinout_conf.trgout_bytrigger = 1;
	triggerinout_conf.trgout_enable = 1;

	sigma_write_register(WRITE_TRIGGER_OPTION,
			     (uint8_t *) &triggerinout_conf,
			     sizeof(struct triggerinout), devc);

	/* Go back to normal mode. */
	sigma_set_register(WRITE_TRIGGER_SELECT1, triggerselect, devc);

	/* Set clock select register. */
	if (devc->cur_samplerate == SR_MHZ(200))
		/* Enable 4 channels. */
		sigma_set_register(WRITE_CLOCK_SELECT, 0xf0, devc);
	else if (devc->cur_samplerate == SR_MHZ(100))
		/* Enable 8 channels. */
		sigma_set_register(WRITE_CLOCK_SELECT, 0x00, devc);
	else {
		/*
		 * 50 MHz mode (or fraction thereof). Any fraction down to
		 * 50 MHz / 256 can be used, but is not supported by sigrok API.
		 */
		frac = SR_MHZ(50) / devc->cur_samplerate - 1;

		clockselect.async = 0;
		clockselect.fraction = frac;
		clockselect.disabled_channels = 0;

		sigma_write_register(WRITE_CLOCK_SELECT,
				     (uint8_t *) &clockselect,
				     sizeof(clockselect), devc);
	}

	/* Setup maximum post trigger time. */
	sigma_set_register(WRITE_POST_TRIGGER,
			   (devc->capture_ratio * 255) / 100, devc);

	/* Start acqusition. */
	gettimeofday(&devc->start_tv, 0);
	sigma_set_register(WRITE_MODE, 0x0d, devc);

	std_session_send_df_header(sdi, LOG_PREFIX);

	/* Add capture source. */
	sr_session_source_add(sdi->session, -1, 0, 10, sigma_receive_data, (void *)sdi);

	devc->state.state = SIGMA_CAPTURE;

	return SR_OK;
}

static int dev_acquisition_stop(struct sr_dev_inst *sdi)
{
	struct dev_context *devc;

	devc = sdi->priv;
	devc->state.state = SIGMA_IDLE;

	sr_session_source_remove(sdi->session, -1);

	return SR_OK;
}

SR_PRIV struct sr_dev_driver asix_sigma_driver_info = {
	.name = "asix-sigma",
	.longname = "ASIX SIGMA/SIGMA2",
	.api_version = 1,
	.init = std_init,
	.cleanup = std_cleanup,
	.scan = scan,
	.dev_list = std_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,
	.context = NULL,
};
Commit	Line	Data
3ba56876	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2010-2012 Håvard Espeland <gus@ping.uio.no>,
	5	* Copyright (C) 2010 Martin Stensgård <mastensg@ping.uio.no>
	6	* Copyright (C) 2010 Carl Henrik Lunde <chlunde@ping.uio.no>
	7	*
	8	* This program is free software: you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation, either version 3 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	20	*/
	21
	22	/*
	23	* ASIX SIGMA/SIGMA2 logic analyzer driver
	24	*/
	25
	26	#include <config.h>
	27	#include "protocol.h"
	28
	29	SR_PRIV struct sr_dev_driver asix_sigma_driver_info;
	30
	31	/*
	32	* Channel numbers seem to go from 1-16, according to this image:
	33	* http://tools.asix.net/img/sigma_sigmacab_pins_720.jpg
	34	* (the cable has two additional GND pins, and a TI and TO pin)
	35	*/
	36	static const char *channel_names[] = {
	37	"1", "2", "3", "4", "5", "6", "7", "8",
	38	"9", "10", "11", "12", "13", "14", "15", "16",
	39	};
	40
	41	static const uint32_t drvopts[] = {
	42	SR_CONF_LOGIC_ANALYZER,
	43	};
	44
	45	static const uint32_t devopts[] = {
	46	SR_CONF_LIMIT_MSEC \| SR_CONF_GET \| SR_CONF_SET,
	47	SR_CONF_LIMIT_SAMPLES \| SR_CONF_SET,
	48	SR_CONF_SAMPLERATE \| SR_CONF_GET \| SR_CONF_SET \| SR_CONF_LIST,
	49	SR_CONF_TRIGGER_MATCH \| SR_CONF_LIST,
	50	SR_CONF_CAPTURE_RATIO \| SR_CONF_GET \| SR_CONF_SET,
	51	};
	52
	53	static const int32_t trigger_matches[] = {
	54	SR_TRIGGER_ZERO,
	55	SR_TRIGGER_ONE,
	56	SR_TRIGGER_RISING,
	57	SR_TRIGGER_FALLING,
	58	};
	59
	60
	61	static int dev_clear(const struct sr_dev_driver *di)
	62	{
	63	return std_dev_clear(di, sigma_clear_helper);
	64	}
65
3ba56876	66	static GSList scan(struct sr_dev_driver di, GSList *options)
	67	{
	68	struct sr_dev_inst *sdi;
	69	struct drv_context *drvc;
	70	struct dev_context *devc;
	71	GSList *devices;
	72	struct ftdi_device_list *devlist;
	73	char serial_txt[10];
	74	uint32_t serial;
	75	int ret;
	76	unsigned int i;
	77
	78	(void)options;
	79
	80	drvc = di->context;
	81
	82	devices = NULL;
	83
	84	devc = g_malloc0(sizeof(struct dev_context));
	85
	86	ftdi_init(&devc->ftdic);
	87
	88	/* Look for SIGMAs. */
	89
	90	if ((ret = ftdi_usb_find_all(&devc->ftdic, &devlist,
	91	USB_VENDOR, USB_PRODUCT)) <= 0) {
	92	if (ret < 0)
	93	sr_err("ftdi_usb_find_all(): %d", ret);
	94	goto free;
	95	}
	96
	97	/* Make sure it's a version 1 or 2 SIGMA. */
	98	ftdi_usb_get_strings(&devc->ftdic, devlist->dev, NULL, 0, NULL, 0,
	99	serial_txt, sizeof(serial_txt));
	100	sscanf(serial_txt, "%x", &serial);
	101
	102	if (serial < 0xa6010000 \|\| serial > 0xa602ffff) {
	103	sr_err("Only SIGMA and SIGMA2 are supported "
	104	"in this version of libsigrok.");
	105	goto free;
	106	}
	107
	108	sr_info("Found ASIX SIGMA - Serial: %s", serial_txt);
	109
	110	devc->cur_samplerate = samplerates[0];
	111	devc->period_ps = 0;
	112	devc->limit_msec = 0;
	113	devc->cur_firmware = -1;
	114	devc->num_channels = 0;
	115	devc->samples_per_event = 0;
	116	devc->capture_ratio = 50;
	117	devc->use_triggers = 0;
	118
	119	/* Register SIGMA device. */
	120	sdi = g_malloc0(sizeof(struct sr_dev_inst));
	121	sdi->status = SR_ST_INITIALIZING;
	122	sdi->vendor = g_strdup(USB_VENDOR_NAME);
	123	sdi->model = g_strdup(USB_MODEL_NAME);
	124	sdi->driver = di;
	125
	126	for (i = 0; i < ARRAY_SIZE(channel_names); i++)
	127	sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE, channel_names[i]);
	128
	129	devices = g_slist_append(devices, sdi);
130	drvc->instances = g_slist_append(drvc->instances, sdi);
131	sdi->priv = devc;
132
133	/* We will open the device again when we need it. */
134	ftdi_list_free(&devlist);
135
136	return devices;
137
138	free:
139	ftdi_deinit(&devc->ftdic);
140	g_free(devc);
141	return NULL;
142	}
143
3ba56876	144	static int dev_open(struct sr_dev_inst *sdi)
	145	{
	146	struct dev_context *devc;
	147	int ret;
	148
	149	devc = sdi->priv;
	150
	151	/* Make sure it's an ASIX SIGMA. */
	152	if ((ret = ftdi_usb_open_desc(&devc->ftdic,
	153	USB_VENDOR, USB_PRODUCT, USB_DESCRIPTION, NULL)) < 0) {
	154
	155	sr_err("ftdi_usb_open failed: %s",
	156	ftdi_get_error_string(&devc->ftdic));
	157
	158	return 0;
	159	}
	160
	161	sdi->status = SR_ST_ACTIVE;
	162
	163	return SR_OK;
	164	}
	165
	166	static int dev_close(struct sr_dev_inst *sdi)
	167	{
	168	struct dev_context *devc;
	169
	170	devc = sdi->priv;
	171
	172	/* TODO */
	173	if (sdi->status == SR_ST_ACTIVE)
	174	ftdi_usb_close(&devc->ftdic);
	175
	176	sdi->status = SR_ST_INACTIVE;
	177
	178	return SR_OK;
	179	}
	180
3ba56876	181	static int config_get(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	182	const struct sr_channel_group *cg)
	183	{
	184	struct dev_context *devc;
	185
	186	(void)cg;
	187
	188	if (!sdi)
	189	return SR_ERR;
	190	devc = sdi->priv;
	191
	192	switch (key) {
	193	case SR_CONF_SAMPLERATE:
	194	*data = g_variant_new_uint64(devc->cur_samplerate);
	195	break;
	196	case SR_CONF_LIMIT_MSEC:
	197	*data = g_variant_new_uint64(devc->limit_msec);
	198	break;
	199	case SR_CONF_CAPTURE_RATIO:
	200	*data = g_variant_new_uint64(devc->capture_ratio);
	201	break;
	202	default:
	203	return SR_ERR_NA;
	204	}
	205
	206	return SR_OK;
	207	}
	208
	209	static int config_set(uint32_t key, GVariant data, const struct sr_dev_inst sdi,
	210	const struct sr_channel_group *cg)
	211	{
	212	struct dev_context *devc;
	213	uint64_t tmp;
	214	int ret;
	215
	216	(void)cg;
	217
	218	if (sdi->status != SR_ST_ACTIVE)
	219	return SR_ERR_DEV_CLOSED;
	220
	221	devc = sdi->priv;
	222
	223	ret = SR_OK;
	224	switch (key) {
	225	case SR_CONF_SAMPLERATE:
	226	ret = sigma_set_samplerate(sdi, g_variant_get_uint64(data));
	227	break;
	228	case SR_CONF_LIMIT_MSEC:
	229	tmp = g_variant_get_uint64(data);
	230	if (tmp > 0)
	231	devc->limit_msec = g_variant_get_uint64(data);
	232	else
	233	ret = SR_ERR;
	234	break;
	235	case SR_CONF_LIMIT_SAMPLES:
	236	tmp = g_variant_get_uint64(data);
	237	devc->limit_msec = tmp * 1000 / devc->cur_samplerate;
	238	break;
	239	case SR_CONF_CAPTURE_RATIO:
	240	tmp = g_variant_get_uint64(data);
	241	if (tmp <= 100)
	242	devc->capture_ratio = tmp;
	243	else
	244	ret = SR_ERR;
245	break;
246	default:
247	ret = SR_ERR_NA;
248	}
249
250	return ret;
251	}
252
253	static int config_list(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
254	const struct sr_channel_group *cg)
255	{
256	GVariant *gvar;
257	GVariantBuilder gvb;
258
259	(void)cg;
260
261	switch (key) {
262	case SR_CONF_DEVICE_OPTIONS:
263	if (!sdi)
264	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
265	drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
266	else
267	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
268	devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
269	break;
270	case SR_CONF_SAMPLERATE:
271	g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
272	gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), samplerates,
273	SAMPLERATES_COUNT, sizeof(uint64_t));
274	g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
275	*data = g_variant_builder_end(&gvb);
276	break;
277	case SR_CONF_TRIGGER_MATCH:
278	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
279	trigger_matches, ARRAY_SIZE(trigger_matches),
280	sizeof(int32_t));
281	break;
282	default:
283	return SR_ERR_NA;
284	}
285
286	return SR_OK;
287	}
288
695dc859	289	static int dev_acquisition_start(const struct sr_dev_inst *sdi)
3ba56876	290	{
	291	struct dev_context *devc;
	292	struct clockselect_50 clockselect;
	293	int frac, triggerpin, ret;
	294	uint8_t triggerselect = 0;
	295	struct triggerinout triggerinout_conf;
	296	struct triggerlut lut;
	297
	298	if (sdi->status != SR_ST_ACTIVE)
	299	return SR_ERR_DEV_CLOSED;
	300
	301	devc = sdi->priv;
	302
	303	if (sigma_convert_trigger(sdi) != SR_OK) {
	304	sr_err("Failed to configure triggers.");
	305	return SR_ERR;
	306	}
	307
	308	/* If the samplerate has not been set, default to 200 kHz. */
	309	if (devc->cur_firmware == -1) {
	310	if ((ret = sigma_set_samplerate(sdi, SR_KHZ(200))) != SR_OK)
	311	return ret;
	312	}
	313
	314	/* Enter trigger programming mode. */
	315	sigma_set_register(WRITE_TRIGGER_SELECT1, 0x20, devc);
	316
	317	/* 100 and 200 MHz mode. */
	318	if (devc->cur_samplerate >= SR_MHZ(100)) {
	319	sigma_set_register(WRITE_TRIGGER_SELECT1, 0x81, devc);
	320
	321	/* Find which pin to trigger on from mask. */
0a1f7b09	322	for (triggerpin = 0; triggerpin < 8; triggerpin++)
3ba56876	323	if ((devc->trigger.risingmask \| devc->trigger.fallingmask) &
	324	(1 << triggerpin))
	325	break;
	326
	327	/* Set trigger pin and light LED on trigger. */
	328	triggerselect = (1 << LEDSEL1) \| (triggerpin & 0x7);
	329
	330	/* Default rising edge. */
	331	if (devc->trigger.fallingmask)
	332	triggerselect \|= 1 << 3;
	333
	334	/* All other modes. */
	335	} else if (devc->cur_samplerate <= SR_MHZ(50)) {
	336	sigma_build_basic_trigger(&lut, devc);
	337
	338	sigma_write_trigger_lut(&lut, devc);
	339
	340	triggerselect = (1 << LEDSEL1) \| (1 << LEDSEL0);
	341	}
	342
	343	/* Setup trigger in and out pins to default values. */
	344	memset(&triggerinout_conf, 0, sizeof(struct triggerinout));
	345	triggerinout_conf.trgout_bytrigger = 1;
	346	triggerinout_conf.trgout_enable = 1;
	347
	348	sigma_write_register(WRITE_TRIGGER_OPTION,
	349	(uint8_t *) &triggerinout_conf,
	350	sizeof(struct triggerinout), devc);
	351
	352	/* Go back to normal mode. */
	353	sigma_set_register(WRITE_TRIGGER_SELECT1, triggerselect, devc);
	354
	355	/* Set clock select register. */
	356	if (devc->cur_samplerate == SR_MHZ(200))
	357	/* Enable 4 channels. */
	358	sigma_set_register(WRITE_CLOCK_SELECT, 0xf0, devc);
	359	else if (devc->cur_samplerate == SR_MHZ(100))
	360	/* Enable 8 channels. */
	361	sigma_set_register(WRITE_CLOCK_SELECT, 0x00, devc);
	362	else {
	363	/*
	364	* 50 MHz mode (or fraction thereof). Any fraction down to
	365	* 50 MHz / 256 can be used, but is not supported by sigrok API.
	366	*/
	367	frac = SR_MHZ(50) / devc->cur_samplerate - 1;
	368
	369	clockselect.async = 0;
	370	clockselect.fraction = frac;
	371	clockselect.disabled_channels = 0;
	372
	373	sigma_write_register(WRITE_CLOCK_SELECT,
	374	(uint8_t *) &clockselect,
	375	sizeof(clockselect), devc);
	376	}
	377
	378	/* Setup maximum post trigger time. */
	379	sigma_set_register(WRITE_POST_TRIGGER,
	380	(devc->capture_ratio * 255) / 100, devc);
	381
	382	/* Start acqusition. */
	383	gettimeofday(&devc->start_tv, 0);
	384	sigma_set_register(WRITE_MODE, 0x0d, devc);
	385
3ba56876	386	std_session_send_df_header(sdi, LOG_PREFIX);
	387
	388	/* Add capture source. */
	389	sr_session_source_add(sdi->session, -1, 0, 10, sigma_receive_data, (void *)sdi);
	390
	391	devc->state.state = SIGMA_CAPTURE;
	392
	393	return SR_OK;
	394	}
	395
695dc859	396	static int dev_acquisition_stop(struct sr_dev_inst *sdi)
3ba56876	397	{
	398	struct dev_context *devc;
	399
3ba56876	400	devc = sdi->priv;
	401	devc->state.state = SIGMA_IDLE;
	402
	403	sr_session_source_remove(sdi->session, -1);
	404
	405	return SR_OK;
	406	}
	407
	408	SR_PRIV struct sr_dev_driver asix_sigma_driver_info = {
	409	.name = "asix-sigma",
	410	.longname = "ASIX SIGMA/SIGMA2",
	411	.api_version = 1,
c2fdcc25	412	.init = std_init,
700d6b64	413	.cleanup = std_cleanup,
3ba56876	414	.scan = scan,
c01bf34c	415	.dev_list = std_dev_list,
3ba56876	416	.dev_clear = dev_clear,
	417	.config_get = config_get,
	418	.config_set = config_set,
	419	.config_list = config_list,
	420	.dev_open = dev_open,
	421	.dev_close = dev_close,
	422	.dev_acquisition_start = dev_acquisition_start,
	423	.dev_acquisition_stop = dev_acquisition_stop,
	424	.context = NULL,
	425	};