[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"

/*
 * 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_GET | 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 dev_context *devc;
	struct ftdi_device_list *devlist;
	char serial_txt[10];
	uint32_t serial;
	int ret;
	unsigned int i;

	(void)options;

	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->limit_samples = 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);

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

	sdi->priv = devc;

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

	return std_scan_complete(di, g_slist_append(NULL, sdi));

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_LIMIT_SAMPLES:
		*data = g_variant_new_uint64(devc->limit_samples);
		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_samples = tmp;
		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(samplerates[0]));
		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);

	/* 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;
}

static 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,
};
SR_REGISTER_DEV_DRIVER(asix_sigma_driver_info);
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
3ba56876	29	/*
	30	* Channel numbers seem to go from 1-16, according to this image:
	31	* http://tools.asix.net/img/sigma_sigmacab_pins_720.jpg
	32	* (the cable has two additional GND pins, and a TI and TO pin)
	33	*/
	34	static const char *channel_names[] = {
	35	"1", "2", "3", "4", "5", "6", "7", "8",
	36	"9", "10", "11", "12", "13", "14", "15", "16",
	37	};
	38
	39	static const uint32_t drvopts[] = {
	40	SR_CONF_LOGIC_ANALYZER,
	41	};
	42
	43	static const uint32_t devopts[] = {
	44	SR_CONF_LIMIT_MSEC \| SR_CONF_GET \| SR_CONF_SET,
2f7e529c	45	SR_CONF_LIMIT_SAMPLES \| SR_CONF_GET \| SR_CONF_SET,
3ba56876	46	SR_CONF_SAMPLERATE \| SR_CONF_GET \| SR_CONF_SET \| SR_CONF_LIST,
	47	SR_CONF_TRIGGER_MATCH \| SR_CONF_LIST,
	48	SR_CONF_CAPTURE_RATIO \| SR_CONF_GET \| SR_CONF_SET,
	49	};
	50
	51	static const int32_t trigger_matches[] = {
	52	SR_TRIGGER_ZERO,
	53	SR_TRIGGER_ONE,
	54	SR_TRIGGER_RISING,
	55	SR_TRIGGER_FALLING,
	56	};
	57
	58
	59	static int dev_clear(const struct sr_dev_driver *di)
	60	{
	61	return std_dev_clear(di, sigma_clear_helper);
	62	}
	63
3ba56876	64	static GSList scan(struct sr_dev_driver di, GSList *options)
	65	{
	66	struct sr_dev_inst *sdi;
3ba56876	67	struct dev_context *devc;
3ba56876	68	struct ftdi_device_list *devlist;
	69	char serial_txt[10];
	70	uint32_t serial;
	71	int ret;
	72	unsigned int i;
	73
	74	(void)options;
	75
3ba56876	76	devc = g_malloc0(sizeof(struct dev_context));
	77
	78	ftdi_init(&devc->ftdic);
	79
	80	/* Look for SIGMAs. */
	81
	82	if ((ret = ftdi_usb_find_all(&devc->ftdic, &devlist,
	83	USB_VENDOR, USB_PRODUCT)) <= 0) {
	84	if (ret < 0)
	85	sr_err("ftdi_usb_find_all(): %d", ret);
	86	goto free;
	87	}
	88
	89	/* Make sure it's a version 1 or 2 SIGMA. */
	90	ftdi_usb_get_strings(&devc->ftdic, devlist->dev, NULL, 0, NULL, 0,
	91	serial_txt, sizeof(serial_txt));
	92	sscanf(serial_txt, "%x", &serial);
	93
	94	if (serial < 0xa6010000 \|\| serial > 0xa602ffff) {
	95	sr_err("Only SIGMA and SIGMA2 are supported "
	96	"in this version of libsigrok.");
	97	goto free;
	98	}
	99
	100	sr_info("Found ASIX SIGMA - Serial: %s", serial_txt);
	101
	102	devc->cur_samplerate = samplerates[0];
	103	devc->period_ps = 0;
	104	devc->limit_msec = 0;
2f7e529c	105	devc->limit_samples = 0;
3ba56876	106	devc->cur_firmware = -1;
	107	devc->num_channels = 0;
	108	devc->samples_per_event = 0;
	109	devc->capture_ratio = 50;
	110	devc->use_triggers = 0;
	111
	112	/* Register SIGMA device. */
	113	sdi = g_malloc0(sizeof(struct sr_dev_inst));
	114	sdi->status = SR_ST_INITIALIZING;
	115	sdi->vendor = g_strdup(USB_VENDOR_NAME);
	116	sdi->model = g_strdup(USB_MODEL_NAME);
3ba56876	117
	118	for (i = 0; i < ARRAY_SIZE(channel_names); i++)
	119	sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE, channel_names[i]);
	120
3ba56876	121	sdi->priv = devc;
	122
	123	/* We will open the device again when we need it. */
	124	ftdi_list_free(&devlist);
	125
43376f33	126	return std_scan_complete(di, g_slist_append(NULL, sdi));
3ba56876	127
	128	free:
	129	ftdi_deinit(&devc->ftdic);
	130	g_free(devc);
	131	return NULL;
	132	}
	133
3ba56876	134	static int dev_open(struct sr_dev_inst *sdi)
	135	{
	136	struct dev_context *devc;
	137	int ret;
	138
	139	devc = sdi->priv;
	140
	141	/* Make sure it's an ASIX SIGMA. */
	142	if ((ret = ftdi_usb_open_desc(&devc->ftdic,
	143	USB_VENDOR, USB_PRODUCT, USB_DESCRIPTION, NULL)) < 0) {
	144
	145	sr_err("ftdi_usb_open failed: %s",
	146	ftdi_get_error_string(&devc->ftdic));
	147
	148	return 0;
	149	}
	150
	151	sdi->status = SR_ST_ACTIVE;
	152
	153	return SR_OK;
	154	}
	155
	156	static int dev_close(struct sr_dev_inst *sdi)
	157	{
	158	struct dev_context *devc;
	159
	160	devc = sdi->priv;
	161
	162	/* TODO */
	163	if (sdi->status == SR_ST_ACTIVE)
	164	ftdi_usb_close(&devc->ftdic);
	165
	166	sdi->status = SR_ST_INACTIVE;
	167
	168	return SR_OK;
	169	}
	170
3ba56876	171	static int config_get(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	172	const struct sr_channel_group *cg)
	173	{
	174	struct dev_context *devc;
	175
	176	(void)cg;
	177
	178	if (!sdi)
	179	return SR_ERR;
	180	devc = sdi->priv;
	181
	182	switch (key) {
	183	case SR_CONF_SAMPLERATE:
	184	*data = g_variant_new_uint64(devc->cur_samplerate);
	185	break;
	186	case SR_CONF_LIMIT_MSEC:
	187	*data = g_variant_new_uint64(devc->limit_msec);
	188	break;
2f7e529c GS	189	case SR_CONF_LIMIT_SAMPLES:
	190	*data = g_variant_new_uint64(devc->limit_samples);
	191	break;
3ba56876	192	case SR_CONF_CAPTURE_RATIO:
	193	*data = g_variant_new_uint64(devc->capture_ratio);
	194	break;
	195	default:
	196	return SR_ERR_NA;
	197	}
	198
	199	return SR_OK;
	200	}
	201
	202	static int config_set(uint32_t key, GVariant data, const struct sr_dev_inst sdi,
	203	const struct sr_channel_group *cg)
	204	{
	205	struct dev_context *devc;
	206	uint64_t tmp;
	207	int ret;
	208
	209	(void)cg;
	210
	211	if (sdi->status != SR_ST_ACTIVE)
	212	return SR_ERR_DEV_CLOSED;
	213
	214	devc = sdi->priv;
	215
	216	ret = SR_OK;
	217	switch (key) {
	218	case SR_CONF_SAMPLERATE:
	219	ret = sigma_set_samplerate(sdi, g_variant_get_uint64(data));
	220	break;
	221	case SR_CONF_LIMIT_MSEC:
	222	tmp = g_variant_get_uint64(data);
	223	if (tmp > 0)
	224	devc->limit_msec = g_variant_get_uint64(data);
	225	else
	226	ret = SR_ERR;
	227	break;
	228	case SR_CONF_LIMIT_SAMPLES:
	229	tmp = g_variant_get_uint64(data);
2f7e529c	230	devc->limit_samples = tmp;
3ba56876	231	devc->limit_msec = tmp * 1000 / devc->cur_samplerate;
	232	break;
	233	case SR_CONF_CAPTURE_RATIO:
	234	tmp = g_variant_get_uint64(data);
	235	if (tmp <= 100)
	236	devc->capture_ratio = tmp;
	237	else
	238	ret = SR_ERR;
	239	break;
	240	default:
	241	ret = SR_ERR_NA;
	242	}
	243
	244	return ret;
	245	}
	246
	247	static int config_list(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	248	const struct sr_channel_group *cg)
	249	{
	250	GVariant *gvar;
	251	GVariantBuilder gvb;
	252
	253	(void)cg;
	254
	255	switch (key) {
	256	case SR_CONF_DEVICE_OPTIONS:
	257	if (!sdi)
	258	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	259	drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
	260	else
	261	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	262	devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
	263	break;
	264	case SR_CONF_SAMPLERATE:
	265	g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
	266	gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), samplerates,
4154a516	267	samplerates_count, sizeof(samplerates[0]));
3ba56876	268	g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
	269	*data = g_variant_builder_end(&gvb);
	270	break;
	271	case SR_CONF_TRIGGER_MATCH:
	272	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
	273	trigger_matches, ARRAY_SIZE(trigger_matches),
	274	sizeof(int32_t));
	275	break;
	276	default:
	277	return SR_ERR_NA;
	278	}
	279
	280	return SR_OK;
	281	}
	282
695dc859	283	static int dev_acquisition_start(const struct sr_dev_inst *sdi)
3ba56876	284	{
	285	struct dev_context *devc;
	286	struct clockselect_50 clockselect;
	287	int frac, triggerpin, ret;
	288	uint8_t triggerselect = 0;
	289	struct triggerinout triggerinout_conf;
	290	struct triggerlut lut;
	291
	292	if (sdi->status != SR_ST_ACTIVE)
	293	return SR_ERR_DEV_CLOSED;
	294
	295	devc = sdi->priv;
	296
	297	if (sigma_convert_trigger(sdi) != SR_OK) {
	298	sr_err("Failed to configure triggers.");
	299	return SR_ERR;
	300	}
	301
	302	/* If the samplerate has not been set, default to 200 kHz. */
	303	if (devc->cur_firmware == -1) {
	304	if ((ret = sigma_set_samplerate(sdi, SR_KHZ(200))) != SR_OK)
	305	return ret;
	306	}
	307
	308	/* Enter trigger programming mode. */
	309	sigma_set_register(WRITE_TRIGGER_SELECT1, 0x20, devc);
	310
	311	/* 100 and 200 MHz mode. */
	312	if (devc->cur_samplerate >= SR_MHZ(100)) {
	313	sigma_set_register(WRITE_TRIGGER_SELECT1, 0x81, devc);
	314
	315	/* Find which pin to trigger on from mask. */
0a1f7b09	316	for (triggerpin = 0; triggerpin < 8; triggerpin++)
3ba56876	317	if ((devc->trigger.risingmask \| devc->trigger.fallingmask) &
	318	(1 << triggerpin))
	319	break;
	320
	321	/* Set trigger pin and light LED on trigger. */
	322	triggerselect = (1 << LEDSEL1) \| (triggerpin & 0x7);
	323
	324	/* Default rising edge. */
	325	if (devc->trigger.fallingmask)
	326	triggerselect \|= 1 << 3;
	327
	328	/* All other modes. */
	329	} else if (devc->cur_samplerate <= SR_MHZ(50)) {
	330	sigma_build_basic_trigger(&lut, devc);
	331
	332	sigma_write_trigger_lut(&lut, devc);
	333
	334	triggerselect = (1 << LEDSEL1) \| (1 << LEDSEL0);
	335	}
	336
	337	/* Setup trigger in and out pins to default values. */
	338	memset(&triggerinout_conf, 0, sizeof(struct triggerinout));
	339	triggerinout_conf.trgout_bytrigger = 1;
	340	triggerinout_conf.trgout_enable = 1;
	341
	342	sigma_write_register(WRITE_TRIGGER_OPTION,
	343	(uint8_t *) &triggerinout_conf,
	344	sizeof(struct triggerinout), devc);
	345
	346	/* Go back to normal mode. */
	347	sigma_set_register(WRITE_TRIGGER_SELECT1, triggerselect, devc);
	348
	349	/* Set clock select register. */
	350	if (devc->cur_samplerate == SR_MHZ(200))
	351	/* Enable 4 channels. */
	352	sigma_set_register(WRITE_CLOCK_SELECT, 0xf0, devc);
	353	else if (devc->cur_samplerate == SR_MHZ(100))
	354	/* Enable 8 channels. */
	355	sigma_set_register(WRITE_CLOCK_SELECT, 0x00, devc);
	356	else {
	357	/*
	358	* 50 MHz mode (or fraction thereof). Any fraction down to
	359	* 50 MHz / 256 can be used, but is not supported by sigrok API.
	360	*/
	361	frac = SR_MHZ(50) / devc->cur_samplerate - 1;
	362
	363	clockselect.async = 0;
	364	clockselect.fraction = frac;
	365	clockselect.disabled_channels = 0;
	366
	367	sigma_write_register(WRITE_CLOCK_SELECT,
	368	(uint8_t *) &clockselect,
	369	sizeof(clockselect), devc);
	370	}
	371
	372	/* Setup maximum post trigger time. */
	373	sigma_set_register(WRITE_POST_TRIGGER,
	374	(devc->capture_ratio * 255) / 100, devc);
	375
	376	/* Start acqusition. */
	377	gettimeofday(&devc->start_tv, 0);
	378	sigma_set_register(WRITE_MODE, 0x0d, devc);
	379
bee2b016	380	std_session_send_df_header(sdi);
3ba56876	381
	382	/* Add capture source. */
	383	sr_session_source_add(sdi->session, -1, 0, 10, sigma_receive_data, (void *)sdi);
	384
	385	devc->state.state = SIGMA_CAPTURE;
	386
	387	return SR_OK;
	388	}
	389
695dc859	390	static int dev_acquisition_stop(struct sr_dev_inst *sdi)
3ba56876	391	{
	392	struct dev_context *devc;
	393
3ba56876	394	devc = sdi->priv;
	395	devc->state.state = SIGMA_IDLE;
	396
	397	sr_session_source_remove(sdi->session, -1);
	398
	399	return SR_OK;
	400	}
	401
dd5c48a6	402	static struct sr_dev_driver asix_sigma_driver_info = {
3ba56876	403	.name = "asix-sigma",
	404	.longname = "ASIX SIGMA/SIGMA2",
	405	.api_version = 1,
c2fdcc25	406	.init = std_init,
700d6b64	407	.cleanup = std_cleanup,
3ba56876	408	.scan = scan,
c01bf34c	409	.dev_list = std_dev_list,
3ba56876	410	.dev_clear = dev_clear,
	411	.config_get = config_get,
	412	.config_set = config_set,
	413	.config_list = config_list,
	414	.dev_open = dev_open,
	415	.dev_close = dev_close,
	416	.dev_acquisition_start = dev_acquisition_start,
	417	.dev_acquisition_stop = dev_acquisition_stop,
	418	.context = NULL,
	419	};
dd5c48a6	420	SR_REGISTER_DEV_DRIVER(asix_sigma_driver_info);