[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/>.
 */

#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 scanopts[] = {
	SR_CONF_CONN,
};

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_CONN | SR_CONF_GET,
	SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
#if ASIX_SIGMA_WITH_TRIGGER
	SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
	SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET,
#endif
};

#if ASIX_SIGMA_WITH_TRIGGER
static const int32_t trigger_matches[] = {
	SR_TRIGGER_ZERO,
	SR_TRIGGER_ONE,
	SR_TRIGGER_RISING,
	SR_TRIGGER_FALLING,
};
#endif

static void clear_helper(struct dev_context *devc)
{
	ftdi_deinit(&devc->ftdic);
}

static int dev_clear(const struct sr_dev_driver *di)
{
	return std_dev_clear_with_callback(di, (std_dev_clear_callback)clear_helper);
}

static gboolean bus_addr_in_devices(int bus, int addr, GSList *devs)
{
	struct sr_usb_dev_inst *usb;

	for (/* EMPTY */; devs; devs = devs->next) {
		usb = devs->data;
		if (usb->bus == bus && usb->address == addr)
			return TRUE;
	}

	return FALSE;
}

static gboolean known_vid_pid(const struct libusb_device_descriptor *des)
{
	if (des->idVendor != USB_VENDOR_ASIX)
		return FALSE;
	if (des->idProduct != USB_PRODUCT_SIGMA && des->idProduct != USB_PRODUCT_OMEGA)
		return FALSE;
	return TRUE;
}

static GSList *scan(struct sr_dev_driver *di, GSList *options)
{
	struct drv_context *drvc;
	libusb_context *usbctx;
	const char *conn;
	GSList *l, *conn_devices;
	struct sr_config *src;
	GSList *devices;
	libusb_device **devlist, *devitem;
	int bus, addr;
	struct libusb_device_descriptor des;
	struct libusb_device_handle *hdl;
	int ret;
	char conn_id[20];
	char serno_txt[16];
	char *end;
	long serno_num, serno_pre;
	enum asix_device_type dev_type;
	const char *dev_text;
	struct sr_dev_inst *sdi;
	struct dev_context *devc;
	size_t devidx, chidx;

	drvc = di->context;
	usbctx = drvc->sr_ctx->libusb_ctx;

	/* Find all devices which match an (optional) conn= spec. */
	conn = NULL;
	for (l = options; l; l = l->next) {
		src = l->data;
		switch (src->key) {
		case SR_CONF_CONN:
			conn = g_variant_get_string(src->data, NULL);
			break;
		}
	}
	conn_devices = NULL;
	if (conn)
		conn_devices = sr_usb_find(usbctx, conn);
	if (conn && !conn_devices)
		return NULL;

	/* Find all ASIX logic analyzers (which match the connection spec). */
	devices = NULL;
	libusb_get_device_list(usbctx, &devlist);
	for (devidx = 0; devlist[devidx]; devidx++) {
		devitem = devlist[devidx];

		/* Check for connection match if a user spec was given. */
		bus = libusb_get_bus_number(devitem);
		addr = libusb_get_device_address(devitem);
		if (conn && !bus_addr_in_devices(bus, addr, conn_devices))
			continue;
		snprintf(conn_id, sizeof(conn_id), "%d.%d", bus, addr);

		/*
		 * Check for known VID:PID pairs. Get the serial number,
		 * to then derive the device type from it.
		 */
		libusb_get_device_descriptor(devitem, &des);
		if (!known_vid_pid(&des))
			continue;
		if (!des.iSerialNumber) {
			sr_warn("Cannot get serial number (index 0).");
			continue;
		}
		ret = libusb_open(devitem, &hdl);
		if (ret < 0) {
			sr_warn("Cannot open USB device %04x.%04x: %s.",
				des.idVendor, des.idProduct,
				libusb_error_name(ret));
			continue;
		}
		ret = libusb_get_string_descriptor_ascii(hdl,
			des.iSerialNumber,
			(unsigned char *)serno_txt, sizeof(serno_txt));
		if (ret < 0) {
			sr_warn("Cannot get serial number (%s).",
				libusb_error_name(ret));
			libusb_close(hdl);
			continue;
		}
		libusb_close(hdl);

		/*
		 * All ASIX logic analyzers have a serial number, which
		 * reads as a hex number, and tells the device type.
		 */
		ret = sr_atol_base(serno_txt, &serno_num, &end, 16);
		if (ret != SR_OK || !end || *end) {
			sr_warn("Cannot interpret serial number %s.", serno_txt);
			continue;
		}
		dev_type = ASIX_TYPE_NONE;
		dev_text = NULL;
		serno_pre = serno_num >> 16;
		switch (serno_pre) {
		case 0xa601:
			dev_type = ASIX_TYPE_SIGMA;
			dev_text = "SIGMA";
			sr_info("Found SIGMA, serno %s.", serno_txt);
			break;
		case 0xa602:
			dev_type = ASIX_TYPE_SIGMA;
			dev_text = "SIGMA2";
			sr_info("Found SIGMA2, serno %s.", serno_txt);
			break;
		case 0xa603:
			dev_type = ASIX_TYPE_OMEGA;
			dev_text = "OMEGA";
			sr_info("Found OMEGA, serno %s.", serno_txt);
			if (!ASIX_WITH_OMEGA) {
				sr_warn("OMEGA support is not implemented yet.");
				continue;
			}
			break;
		default:
			sr_warn("Unknown serno %s, skipping.", serno_txt);
			continue;
		}

		/* Create a device instance, add it to the result set. */

		sdi = g_malloc0(sizeof(*sdi));
		devices = g_slist_append(devices, sdi);
		sdi->status = SR_ST_INITIALIZING;
		sdi->vendor = g_strdup("ASIX");
		sdi->model = g_strdup(dev_text);
		sdi->serial_num = g_strdup(serno_txt);
		sdi->connection_id = g_strdup(conn_id);
		for (chidx = 0; chidx < ARRAY_SIZE(channel_names); chidx++)
			sr_channel_new(sdi, chidx, SR_CHANNEL_LOGIC,
				TRUE, channel_names[chidx]);

		devc = g_malloc0(sizeof(*devc));
		sdi->priv = devc;
		devc->id.vid = des.idVendor;
		devc->id.pid = des.idProduct;
		devc->id.serno = serno_num;
		devc->id.prefix = serno_pre;
		devc->id.type = dev_type;
		devc->cur_samplerate = samplerates[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;
	}
	libusb_free_device_list(devlist, 1);
	g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);

	return std_scan_complete(di, devices);
}

static int dev_open(struct sr_dev_inst *sdi)
{
	struct dev_context *devc;
	long vid, pid;
	const char *serno;
	int ret;

	devc = sdi->priv;

	if (devc->id.type == ASIX_TYPE_OMEGA && !ASIX_WITH_OMEGA) {
		sr_err("OMEGA support is not implemented yet.");
		return SR_ERR_NA;
	}
	vid = devc->id.vid;
	pid = devc->id.pid;
	serno = sdi->serial_num;

	ret = ftdi_init(&devc->ftdic);
	if (ret < 0) {
		sr_err("Cannot initialize FTDI context (%d): %s.",
			ret, ftdi_get_error_string(&devc->ftdic));
		return SR_ERR_IO;
	}
	ret = ftdi_usb_open_desc_index(&devc->ftdic, vid, pid, NULL, serno, 0);
	if (ret < 0) {
		sr_err("Cannot open device (%d): %s.",
			ret, ftdi_get_error_string(&devc->ftdic));
		return SR_ERR_IO;
	}

	return SR_OK;
}

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

	devc = sdi->priv;

	ret = ftdi_usb_close(&devc->ftdic);
	ftdi_deinit(&devc->ftdic);

	return (ret == 0) ? SR_OK : SR_ERR;
}

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_CONN:
		*data = g_variant_new_string(sdi->connection_id);
		break;
	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;
#if ASIX_SIGMA_WITH_TRIGGER
	case SR_CONF_CAPTURE_RATIO:
		*data = g_variant_new_uint64(devc->capture_ratio);
		break;
#endif
	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;

	(void)cg;

	devc = sdi->priv;

	switch (key) {
	case SR_CONF_SAMPLERATE:
		return sigma_set_samplerate(sdi, g_variant_get_uint64(data));
	case SR_CONF_LIMIT_MSEC:
		devc->limit_msec = g_variant_get_uint64(data);
		break;
	case SR_CONF_LIMIT_SAMPLES:
		devc->limit_samples = g_variant_get_uint64(data);
		devc->limit_msec = sigma_limit_samples_to_msec(devc,
						devc->limit_samples);
		break;
#if ASIX_SIGMA_WITH_TRIGGER
	case SR_CONF_CAPTURE_RATIO:
		devc->capture_ratio = g_variant_get_uint64(data);
		break;
#endif
	default:
		return SR_ERR_NA;
	}

	return SR_OK;
}

static int config_list(uint32_t key, GVariant **data,
	const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
{
	switch (key) {
	case SR_CONF_SCAN_OPTIONS:
	case SR_CONF_DEVICE_OPTIONS:
		if (cg)
			return SR_ERR_NA;
		return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
	case SR_CONF_SAMPLERATE:
		*data = std_gvar_samplerates(samplerates, samplerates_count);
		break;
#if ASIX_SIGMA_WITH_TRIGGER
	case SR_CONF_TRIGGER_MATCH:
		*data = std_gvar_array_i32(ARRAY_AND_SIZE(trigger_matches));
		break;
#endif
	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 triggerpin, ret;
	uint8_t triggerselect;
	struct triggerinout triggerinout_conf;
	struct triggerlut lut;
	uint8_t regval;
	uint8_t clock_bytes[sizeof(clockselect)];
	size_t clock_idx;

	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);

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

	} else if (devc->cur_samplerate <= SR_MHZ(50)) {
		/* All other modes. */
		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. */
	clockselect.async = 0;
	clockselect.fraction = 1 - 1;		/* Divider 1. */
	clockselect.disabled_channels = 0x0000;	/* All channels enabled. */
	if (devc->cur_samplerate == SR_MHZ(200)) {
		/* Enable 4 channels. */
		clockselect.disabled_channels = 0xf0ff;
	} else if (devc->cur_samplerate == SR_MHZ(100)) {
		/* Enable 8 channels. */
		clockselect.disabled_channels = 0x00ff;
	} else {
		/*
		 * 50 MHz mode, or fraction thereof. The 50MHz reference
		 * can get divided by any integer in the range 1 to 256.
		 * Divider minus 1 gets written to the hardware.
		 * (The driver lists a discrete set of sample rates, but
		 * all of them fit the above description.)
		 */
		clockselect.fraction = SR_MHZ(50) / devc->cur_samplerate - 1;
	}
	clock_idx = 0;
	clock_bytes[clock_idx++] = clockselect.async;
	clock_bytes[clock_idx++] = clockselect.fraction;
	clock_bytes[clock_idx++] = clockselect.disabled_channels & 0xff;
	clock_bytes[clock_idx++] = clockselect.disabled_channels >> 8;
	sigma_write_register(WRITE_CLOCK_SELECT, clock_bytes, clock_idx, devc);

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

	/* Start acqusition. */
	devc->start_time = g_get_monotonic_time();
	regval =  WMR_TRGRES | WMR_SDRAMWRITEEN;
#if ASIX_SIGMA_WITH_TRIGGER
	regval |= WMR_TRGEN;
#endif
	sigma_set_register(WRITE_MODE, regval, 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;

	/*
	 * When acquisition is currently running, keep the receive
	 * routine registered and have it stop the acquisition upon the
	 * next invocation. Else unregister the receive routine here
	 * already. The detour is required to have sample data retrieved
	 * for forced acquisition stops.
	 */
	if (devc->state.state == SIGMA_CAPTURE) {
		devc->state.state = SIGMA_STOPPING;
	} else {
		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
3ba56876	22	#include <config.h>
	23	#include "protocol.h"
	24
3ba56876	25	/*
	26	* Channel numbers seem to go from 1-16, according to this image:
	27	* http://tools.asix.net/img/sigma_sigmacab_pins_720.jpg
	28	* (the cable has two additional GND pins, and a TI and TO pin)
	29	*/
	30	static const char *channel_names[] = {
	31	"1", "2", "3", "4", "5", "6", "7", "8",
	32	"9", "10", "11", "12", "13", "14", "15", "16",
	33	};
	34
53a939ab GS	35	static const uint32_t scanopts[] = {
	36	SR_CONF_CONN,
	37	};
	38
3ba56876	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,
53a939ab	46	SR_CONF_CONN \| SR_CONF_GET,
3ba56876	47	SR_CONF_SAMPLERATE \| SR_CONF_GET \| SR_CONF_SET \| SR_CONF_LIST,
de3f7acb	48	#if ASIX_SIGMA_WITH_TRIGGER
3ba56876	49	SR_CONF_TRIGGER_MATCH \| SR_CONF_LIST,
3ba56876	50	SR_CONF_CAPTURE_RATIO \| SR_CONF_GET \| SR_CONF_SET,
de3f7acb	51	#endif
3ba56876	52	};
3ba56876	53
eac48b34	54	#if ASIX_SIGMA_WITH_TRIGGER
3ba56876	55	static const int32_t trigger_matches[] = {
	56	SR_TRIGGER_ZERO,
	57	SR_TRIGGER_ONE,
	58	SR_TRIGGER_RISING,
	59	SR_TRIGGER_FALLING,
	60	};
eac48b34	61	#endif
3ba56876	62
3553451f	63	static void clear_helper(struct dev_context *devc)
53279f13	64	{
53279f13 UH	65	ftdi_deinit(&devc->ftdic);
	66	}
	67
3ba56876	68	static int dev_clear(const struct sr_dev_driver *di)
3ba56876	69	{
3553451f	70	return std_dev_clear_with_callback(di, (std_dev_clear_callback)clear_helper);
3ba56876	71	}
3ba56876	72
53a939ab	73	static gboolean bus_addr_in_devices(int bus, int addr, GSList *devs)
3ba56876	74	{
53a939ab	75	struct sr_usb_dev_inst *usb;
3ba56876	76
53a939ab GS	77	for (/* EMPTY */; devs; devs = devs->next) {
	78	usb = devs->data;
	79	if (usb->bus == bus && usb->address == addr)
	80	return TRUE;
	81	}
3ba56876	82
53a939ab GS	83	return FALSE;
53a939ab GS	84	}
3ba56876	85
53a939ab GS	86	static gboolean known_vid_pid(const struct libusb_device_descriptor *des)
	87	{
	88	if (des->idVendor != USB_VENDOR_ASIX)
	89	return FALSE;
	90	if (des->idProduct != USB_PRODUCT_SIGMA && des->idProduct != USB_PRODUCT_OMEGA)
	91	return FALSE;
	92	return TRUE;
	93	}
3ba56876	94
53a939ab GS	95	static GSList scan(struct sr_dev_driver di, GSList *options)
	96	{
	97	struct drv_context *drvc;
	98	libusb_context *usbctx;
	99	const char *conn;
	100	GSList l, conn_devices;
	101	struct sr_config *src;
	102	GSList *devices;
	103	libusb_device *devlist, devitem;
	104	int bus, addr;
	105	struct libusb_device_descriptor des;
	106	struct libusb_device_handle *hdl;
	107	int ret;
	108	char conn_id[20];
	109	char serno_txt[16];
	110	char *end;
	111	long serno_num, serno_pre;
	112	enum asix_device_type dev_type;
	113	const char *dev_text;
	114	struct sr_dev_inst *sdi;
	115	struct dev_context *devc;
	116	size_t devidx, chidx;
	117
	118	drvc = di->context;
	119	usbctx = drvc->sr_ctx->libusb_ctx;
	120
	121	/* Find all devices which match an (optional) conn= spec. */
	122	conn = NULL;
	123	for (l = options; l; l = l->next) {
	124	src = l->data;
	125	switch (src->key) {
	126	case SR_CONF_CONN:
	127	conn = g_variant_get_string(src->data, NULL);
	128	break;
	129	}
3ba56876	130	}
53a939ab GS	131	conn_devices = NULL;
	132	if (conn)
	133	conn_devices = sr_usb_find(usbctx, conn);
	134	if (conn && !conn_devices)
	135	return NULL;
	136
	137	/* Find all ASIX logic analyzers (which match the connection spec). */
	138	devices = NULL;
	139	libusb_get_device_list(usbctx, &devlist);
	140	for (devidx = 0; devlist[devidx]; devidx++) {
	141	devitem = devlist[devidx];
	142
	143	/* Check for connection match if a user spec was given. */
	144	bus = libusb_get_bus_number(devitem);
	145	addr = libusb_get_device_address(devitem);
	146	if (conn && !bus_addr_in_devices(bus, addr, conn_devices))
	147	continue;
	148	snprintf(conn_id, sizeof(conn_id), "%d.%d", bus, addr);
	149
	150	/*
	151	* Check for known VID:PID pairs. Get the serial number,
	152	* to then derive the device type from it.
	153	*/
	154	libusb_get_device_descriptor(devitem, &des);
	155	if (!known_vid_pid(&des))
	156	continue;
	157	if (!des.iSerialNumber) {
	158	sr_warn("Cannot get serial number (index 0).");
	159	continue;
	160	}
	161	ret = libusb_open(devitem, &hdl);
	162	if (ret < 0) {
	163	sr_warn("Cannot open USB device %04x.%04x: %s.",
	164	des.idVendor, des.idProduct,
	165	libusb_error_name(ret));
	166	continue;
	167	}
	168	ret = libusb_get_string_descriptor_ascii(hdl,
	169	des.iSerialNumber,
	170	(unsigned char *)serno_txt, sizeof(serno_txt));
	171	if (ret < 0) {
	172	sr_warn("Cannot get serial number (%s).",
	173	libusb_error_name(ret));
	174	libusb_close(hdl);
	175	continue;
	176	}
	177	libusb_close(hdl);
	178
	179	/*
	180	* All ASIX logic analyzers have a serial number, which
	181	* reads as a hex number, and tells the device type.
	182	*/
	183	ret = sr_atol_base(serno_txt, &serno_num, &end, 16);
	184	if (ret != SR_OK \|\| !end \|\| *end) {
	185	sr_warn("Cannot interpret serial number %s.", serno_txt);
	186	continue;
	187	}
	188	dev_type = ASIX_TYPE_NONE;
	189	dev_text = NULL;
	190	serno_pre = serno_num >> 16;
	191	switch (serno_pre) {
	192	case 0xa601:
	193	dev_type = ASIX_TYPE_SIGMA;
	194	dev_text = "SIGMA";
195	sr_info("Found SIGMA, serno %s.", serno_txt);
196	break;
197	case 0xa602:
198	dev_type = ASIX_TYPE_SIGMA;
199	dev_text = "SIGMA2";
200	sr_info("Found SIGMA2, serno %s.", serno_txt);
201	break;
202	case 0xa603:
203	dev_type = ASIX_TYPE_OMEGA;
204	dev_text = "OMEGA";
205	sr_info("Found OMEGA, serno %s.", serno_txt);
206	if (!ASIX_WITH_OMEGA) {
207	sr_warn("OMEGA support is not implemented yet.");
208	continue;
209	}
210	break;
211	default:
212	sr_warn("Unknown serno %s, skipping.", serno_txt);
213	continue;
214	}
215
216	/* Create a device instance, add it to the result set. */
217
218	sdi = g_malloc0(sizeof(*sdi));
219	devices = g_slist_append(devices, sdi);
220	sdi->status = SR_ST_INITIALIZING;
221	sdi->vendor = g_strdup("ASIX");
222	sdi->model = g_strdup(dev_text);
223	sdi->serial_num = g_strdup(serno_txt);
224	sdi->connection_id = g_strdup(conn_id);
225	for (chidx = 0; chidx < ARRAY_SIZE(channel_names); chidx++)
226	sr_channel_new(sdi, chidx, SR_CHANNEL_LOGIC,
227	TRUE, channel_names[chidx]);
228
229	devc = g_malloc0(sizeof(*devc));
230	sdi->priv = devc;
231	devc->id.vid = des.idVendor;
232	devc->id.pid = des.idProduct;
233	devc->id.serno = serno_num;
234	devc->id.prefix = serno_pre;
235	devc->id.type = dev_type;
236	devc->cur_samplerate = samplerates[0];
237	devc->limit_msec = 0;
238	devc->limit_samples = 0;
239	devc->cur_firmware = -1;
240	devc->num_channels = 0;
241	devc->samples_per_event = 0;
242	devc->capture_ratio = 50;
243	devc->use_triggers = 0;
3ba56876	244	}
53a939ab GS	245	libusb_free_device_list(devlist, 1);
53a939ab GS	246	g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);
3ba56876	247
53a939ab	248	return std_scan_complete(di, devices);
3ba56876	249	}
3ba56876	250
3ba56876	251	static int dev_open(struct sr_dev_inst *sdi)
	252	{
	253	struct dev_context *devc;
53a939ab GS	254	long vid, pid;
53a939ab GS	255	const char *serno;
3ba56876	256	int ret;
	257
	258	devc = sdi->priv;
	259
53a939ab GS	260	if (devc->id.type == ASIX_TYPE_OMEGA && !ASIX_WITH_OMEGA) {
	261	sr_err("OMEGA support is not implemented yet.");
	262	return SR_ERR_NA;
	263	}
	264	vid = devc->id.vid;
	265	pid = devc->id.pid;
	266	serno = sdi->serial_num;
	267
	268	ret = ftdi_init(&devc->ftdic);
	269	if (ret < 0) {
	270	sr_err("Cannot initialize FTDI context (%d): %s.",
	271	ret, ftdi_get_error_string(&devc->ftdic));
	272	return SR_ERR_IO;
	273	}
	274	ret = ftdi_usb_open_desc_index(&devc->ftdic, vid, pid, NULL, serno, 0);
	275	if (ret < 0) {
	276	sr_err("Cannot open device (%d): %s.",
	277	ret, ftdi_get_error_string(&devc->ftdic));
	278	return SR_ERR_IO;
3ba56876	279	}
3ba56876	280
3ba56876	281	return SR_OK;
	282	}
	283
	284	static int dev_close(struct sr_dev_inst *sdi)
	285	{
	286	struct dev_context *devc;
53a939ab	287	int ret;
3ba56876	288
	289	devc = sdi->priv;
	290
53a939ab GS	291	ret = ftdi_usb_close(&devc->ftdic);
	292	ftdi_deinit(&devc->ftdic);
	293
	294	return (ret == 0) ? SR_OK : SR_ERR;
3ba56876	295	}
3ba56876	296
dd7a72ea UH	297	static int config_get(uint32_t key, GVariant **data,
dd7a72ea UH	298	const struct sr_dev_inst sdi, const struct sr_channel_group cg)
3ba56876	299	{
	300	struct dev_context *devc;
	301
	302	(void)cg;
	303
	304	if (!sdi)
	305	return SR_ERR;
	306	devc = sdi->priv;
	307
	308	switch (key) {
53a939ab GS	309	case SR_CONF_CONN:
	310	*data = g_variant_new_string(sdi->connection_id);
	311	break;
3ba56876	312	case SR_CONF_SAMPLERATE:
	313	*data = g_variant_new_uint64(devc->cur_samplerate);
	314	break;
	315	case SR_CONF_LIMIT_MSEC:
	316	*data = g_variant_new_uint64(devc->limit_msec);
	317	break;
2f7e529c GS	318	case SR_CONF_LIMIT_SAMPLES:
	319	*data = g_variant_new_uint64(devc->limit_samples);
	320	break;
de3f7acb	321	#if ASIX_SIGMA_WITH_TRIGGER
3ba56876	322	case SR_CONF_CAPTURE_RATIO:
	323	*data = g_variant_new_uint64(devc->capture_ratio);
	324	break;
de3f7acb	325	#endif
3ba56876	326	default:
	327	return SR_ERR_NA;
	328	}
	329
	330	return SR_OK;
	331	}
	332
dd7a72ea UH	333	static int config_set(uint32_t key, GVariant *data,
dd7a72ea UH	334	const struct sr_dev_inst sdi, const struct sr_channel_group cg)
3ba56876	335	{
3ba56876	336	struct dev_context *devc;
3ba56876	337
	338	(void)cg;
	339
3ba56876	340	devc = sdi->priv;
3ba56876	341
3ba56876	342	switch (key) {
3ba56876	343	case SR_CONF_SAMPLERATE:
758906aa	344	return sigma_set_samplerate(sdi, g_variant_get_uint64(data));
3ba56876	345	case SR_CONF_LIMIT_MSEC:
50ccb36f	346	devc->limit_msec = g_variant_get_uint64(data);
3ba56876	347	break;
3ba56876	348	case SR_CONF_LIMIT_SAMPLES:
efad7ccc UH	349	devc->limit_samples = g_variant_get_uint64(data);
	350	devc->limit_msec = sigma_limit_samples_to_msec(devc,
	351	devc->limit_samples);
3ba56876	352	break;
de3f7acb	353	#if ASIX_SIGMA_WITH_TRIGGER
3ba56876	354	case SR_CONF_CAPTURE_RATIO:
efad7ccc	355	devc->capture_ratio = g_variant_get_uint64(data);
3ba56876	356	break;
de3f7acb	357	#endif
3ba56876	358	default:
758906aa	359	return SR_ERR_NA;
3ba56876	360	}
3ba56876	361
758906aa	362	return SR_OK;
3ba56876	363	}
3ba56876	364
dd7a72ea UH	365	static int config_list(uint32_t key, GVariant **data,
dd7a72ea UH	366	const struct sr_dev_inst sdi, const struct sr_channel_group cg)
3ba56876	367	{
3ba56876	368	switch (key) {
53a939ab	369	case SR_CONF_SCAN_OPTIONS:
3ba56876	370	case SR_CONF_DEVICE_OPTIONS:
53a939ab GS	371	if (cg)
	372	return SR_ERR_NA;
	373	return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
3ba56876	374	case SR_CONF_SAMPLERATE:
463160cb	375	*data = std_gvar_samplerates(samplerates, samplerates_count);
3ba56876	376	break;
de3f7acb	377	#if ASIX_SIGMA_WITH_TRIGGER
3ba56876	378	case SR_CONF_TRIGGER_MATCH:
53012da6	379	*data = std_gvar_array_i32(ARRAY_AND_SIZE(trigger_matches));
3ba56876	380	break;
de3f7acb	381	#endif
3ba56876	382	default:
	383	return SR_ERR_NA;
	384	}
	385
	386	return SR_OK;
	387	}
	388
695dc859	389	static int dev_acquisition_start(const struct sr_dev_inst *sdi)
3ba56876	390	{
	391	struct dev_context *devc;
	392	struct clockselect_50 clockselect;
8256ed15	393	int triggerpin, ret;
f06fb3e9	394	uint8_t triggerselect;
3ba56876	395	struct triggerinout triggerinout_conf;
3ba56876	396	struct triggerlut lut;
22f64ed8	397	uint8_t regval;
8256ed15 GS	398	uint8_t clock_bytes[sizeof(clockselect)];
8256ed15 GS	399	size_t clock_idx;
3ba56876	400
3ba56876	401	devc = sdi->priv;
	402
	403	if (sigma_convert_trigger(sdi) != SR_OK) {
	404	sr_err("Failed to configure triggers.");
	405	return SR_ERR;
	406	}
	407
	408	/* If the samplerate has not been set, default to 200 kHz. */
	409	if (devc->cur_firmware == -1) {
	410	if ((ret = sigma_set_samplerate(sdi, SR_KHZ(200))) != SR_OK)
	411	return ret;
	412	}
	413
	414	/* Enter trigger programming mode. */
	415	sigma_set_register(WRITE_TRIGGER_SELECT1, 0x20, devc);
	416
f06fb3e9	417	triggerselect = 0;
3ba56876	418	if (devc->cur_samplerate >= SR_MHZ(100)) {
f06fb3e9	419	/* 100 and 200 MHz mode. */
3ba56876	420	sigma_set_register(WRITE_TRIGGER_SELECT1, 0x81, devc);
	421
	422	/* Find which pin to trigger on from mask. */
0a1f7b09	423	for (triggerpin = 0; triggerpin < 8; triggerpin++)
3ba56876	424	if ((devc->trigger.risingmask \| devc->trigger.fallingmask) &
	425	(1 << triggerpin))
	426	break;
	427
	428	/* Set trigger pin and light LED on trigger. */
	429	triggerselect = (1 << LEDSEL1) \| (triggerpin & 0x7);
	430
	431	/* Default rising edge. */
	432	if (devc->trigger.fallingmask)
	433	triggerselect \|= 1 << 3;
	434
3ba56876	435	} else if (devc->cur_samplerate <= SR_MHZ(50)) {
f06fb3e9	436	/* All other modes. */
3ba56876	437	sigma_build_basic_trigger(&lut, devc);
	438
	439	sigma_write_trigger_lut(&lut, devc);
	440
	441	triggerselect = (1 << LEDSEL1) \| (1 << LEDSEL0);
	442	}
	443
	444	/* Setup trigger in and out pins to default values. */
	445	memset(&triggerinout_conf, 0, sizeof(struct triggerinout));
	446	triggerinout_conf.trgout_bytrigger = 1;
	447	triggerinout_conf.trgout_enable = 1;
	448
	449	sigma_write_register(WRITE_TRIGGER_OPTION,
	450	(uint8_t *) &triggerinout_conf,
	451	sizeof(struct triggerinout), devc);
	452
	453	/* Go back to normal mode. */
	454	sigma_set_register(WRITE_TRIGGER_SELECT1, triggerselect, devc);
	455
	456	/* Set clock select register. */
8256ed15 GS	457	clockselect.async = 0;
	458	clockselect.fraction = 1 - 1; /* Divider 1. */
	459	clockselect.disabled_channels = 0x0000; /* All channels enabled. */
	460	if (devc->cur_samplerate == SR_MHZ(200)) {
3ba56876	461	/* Enable 4 channels. */
8256ed15 GS	462	clockselect.disabled_channels = 0xf0ff;
8256ed15 GS	463	} else if (devc->cur_samplerate == SR_MHZ(100)) {
3ba56876	464	/* Enable 8 channels. */
8256ed15 GS	465	clockselect.disabled_channels = 0x00ff;
8256ed15 GS	466	} else {
3ba56876	467	/*
8256ed15 GS	468	* 50 MHz mode, or fraction thereof. The 50MHz reference
	469	* can get divided by any integer in the range 1 to 256.
	470	* Divider minus 1 gets written to the hardware.
	471	* (The driver lists a discrete set of sample rates, but
	472	* all of them fit the above description.)
3ba56876	473	*/
8256ed15	474	clockselect.fraction = SR_MHZ(50) / devc->cur_samplerate - 1;
3ba56876	475	}
8256ed15 GS	476	clock_idx = 0;
	477	clock_bytes[clock_idx++] = clockselect.async;
	478	clock_bytes[clock_idx++] = clockselect.fraction;
	479	clock_bytes[clock_idx++] = clockselect.disabled_channels & 0xff;
	480	clock_bytes[clock_idx++] = clockselect.disabled_channels >> 8;
	481	sigma_write_register(WRITE_CLOCK_SELECT, clock_bytes, clock_idx, devc);
3ba56876	482
	483	/* Setup maximum post trigger time. */
	484	sigma_set_register(WRITE_POST_TRIGGER,
	485	(devc->capture_ratio * 255) / 100, devc);
	486
	487	/* Start acqusition. */
2f425a56	488	devc->start_time = g_get_monotonic_time();
22f64ed8 GS	489	regval = WMR_TRGRES \| WMR_SDRAMWRITEEN;
	490	#if ASIX_SIGMA_WITH_TRIGGER
	491	regval \|= WMR_TRGEN;
	492	#endif
	493	sigma_set_register(WRITE_MODE, regval, devc);
3ba56876	494
bee2b016	495	std_session_send_df_header(sdi);
3ba56876	496
	497	/* Add capture source. */
	498	sr_session_source_add(sdi->session, -1, 0, 10, sigma_receive_data, (void *)sdi);
	499
	500	devc->state.state = SIGMA_CAPTURE;
	501
	502	return SR_OK;
	503	}
	504
695dc859	505	static int dev_acquisition_stop(struct sr_dev_inst *sdi)
3ba56876	506	{
	507	struct dev_context *devc;
	508
3ba56876	509	devc = sdi->priv;
3ba56876	510
dde0175d GS	511	/*
	512	* When acquisition is currently running, keep the receive
	513	* routine registered and have it stop the acquisition upon the
	514	* next invocation. Else unregister the receive routine here
	515	* already. The detour is required to have sample data retrieved
	516	* for forced acquisition stops.
	517	*/
	518	if (devc->state.state == SIGMA_CAPTURE) {
	519	devc->state.state = SIGMA_STOPPING;
	520	} else {
	521	devc->state.state = SIGMA_IDLE;
	522	sr_session_source_remove(sdi->session, -1);
	523	}
3ba56876	524
	525	return SR_OK;
	526	}
	527
dd5c48a6	528	static struct sr_dev_driver asix_sigma_driver_info = {
3ba56876	529	.name = "asix-sigma",
	530	.longname = "ASIX SIGMA/SIGMA2",
	531	.api_version = 1,
c2fdcc25	532	.init = std_init,
700d6b64	533	.cleanup = std_cleanup,
3ba56876	534	.scan = scan,
c01bf34c	535	.dev_list = std_dev_list,
3ba56876	536	.dev_clear = dev_clear,
	537	.config_get = config_get,
	538	.config_set = config_set,
	539	.config_list = config_list,
	540	.dev_open = dev_open,
	541	.dev_close = dev_close,
	542	.dev_acquisition_start = dev_acquisition_start,
	543	.dev_acquisition_stop = dev_acquisition_stop,
	544	.context = NULL,
	545	};
dd5c48a6	546	SR_REGISTER_DEV_DRIVER(asix_sigma_driver_info);