[libsigrok.git] / src / hardware / zeroplus-logic-cube / api.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2010-2012 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 <config.h>
#include "protocol.h"

#define USB_INTERFACE			0
#define USB_CONFIGURATION		1
#define NUM_TRIGGER_STAGES		4
#define PACKET_SIZE			2048	/* ?? */

//#define ZP_EXPERIMENTAL

struct zp_model {
	uint16_t vid;
	uint16_t pid;
	const char *model_name;
	unsigned int channels;
	unsigned int sample_depth;	/* In Ksamples/channel */
	unsigned int max_sampling_freq;
};

/*
 * Note -- 16032, 16064 and 16128 *usually* -- but not always -- have the
 * same 128K sample depth.
 */
static const struct zp_model zeroplus_models[] = {
	{0x0c12, 0x7002, "LAP-16128U",    16, 128,  200},
	{0x0c12, 0x7007, "LAP-16032U",    16, 32,   200},
	{0x0c12, 0x7009, "LAP-C(16064)",  16, 64,   100},
	{0x0c12, 0x700a, "LAP-C(16128)",  16, 128,  200},
	{0x0c12, 0x700b, "LAP-C(32128)",  32, 128,  200},
	{0x0c12, 0x700c, "LAP-C(321000)", 32, 1024, 200},
	{0x0c12, 0x700d, "LAP-C(322000)", 32, 2048, 200},
	{0x0c12, 0x700e, "LAP-C(16032)",  16, 32,   100},
	{0x0c12, 0x7016, "LAP-C(162000)", 16, 2048, 200},
	{0x0c12, 0x7025, "LAP-C(16128+)", 16, 128,  200},
	{0x0c12, 0x7064, "Logian-16L",    16, 128,  200},
	{0x0c12, 0x7100, "AKIP-9101",     16, 256,  200},
	ALL_ZERO
};

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

static const uint32_t devopts[] = {
	SR_CONF_LIMIT_SAMPLES | SR_CONF_SET | SR_CONF_LIST,
	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,
	SR_CONF_VOLTAGE_THRESHOLD | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
};

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

/*
 * ZEROPLUS LAP-C (16032) numbers the 16 channels A0-A7 and B0-B7.
 * We currently ignore other untested/unsupported devices here.
 */
static const char *channel_names[] = {
	"A0", "A1", "A2", "A3", "A4", "A5", "A6", "A7",
	"B0", "B1", "B2", "B3", "B4", "B5", "B6", "B7",
	"C0", "C1", "C2", "C3", "C4", "C5", "C6", "C7",
	"D0", "D1", "D2", "D3", "D4", "D5", "D6", "D7",
};

/*
 * The hardware supports more samplerates than these, but these are the
 * options hardcoded into the vendor's Windows GUI.
 */

static const uint64_t samplerates_100[] = {
	SR_HZ(100),
	SR_HZ(500),
	SR_KHZ(1),
	SR_KHZ(5),
	SR_KHZ(25),
	SR_KHZ(50),
	SR_KHZ(100),
	SR_KHZ(200),
	SR_KHZ(400),
	SR_KHZ(800),
	SR_MHZ(1),
	SR_MHZ(10),
	SR_MHZ(25),
	SR_MHZ(50),
	SR_MHZ(80),
	SR_MHZ(100),
};

const uint64_t samplerates_200[] = {
	SR_HZ(100),
	SR_HZ(500),
	SR_KHZ(1),
	SR_KHZ(5),
	SR_KHZ(25),
	SR_KHZ(50),
	SR_KHZ(100),
	SR_KHZ(200),
	SR_KHZ(400),
	SR_KHZ(800),
	SR_MHZ(1),
	SR_MHZ(10),
	SR_MHZ(25),
	SR_MHZ(50),
	SR_MHZ(80),
	SR_MHZ(100),
	SR_MHZ(150),
	SR_MHZ(200),
};

SR_PRIV int zp_set_samplerate(struct dev_context *devc, uint64_t samplerate)
{
	int i;

	for (i = 0; ARRAY_SIZE(samplerates_200); i++)
		if (samplerate == samplerates_200[i])
			break;

	if (i == ARRAY_SIZE(samplerates_200) || samplerate > devc->max_samplerate) {
		sr_err("Unsupported samplerate: %" PRIu64 "Hz.", samplerate);
		return SR_ERR_ARG;
	}

	sr_info("Setting samplerate to %" PRIu64 "Hz.", samplerate);

	if (samplerate >= SR_MHZ(1))
		analyzer_set_freq(samplerate / SR_MHZ(1), FREQ_SCALE_MHZ);
	else if (samplerate >= SR_KHZ(1))
		analyzer_set_freq(samplerate / SR_KHZ(1), FREQ_SCALE_KHZ);
	else
		analyzer_set_freq(samplerate, FREQ_SCALE_HZ);

	devc->cur_samplerate = samplerate;

	return SR_OK;
}

static GSList *scan(struct sr_dev_driver *di, GSList *options)
{
	struct sr_dev_inst *sdi;
	struct drv_context *drvc;
	struct dev_context *devc;
	const struct zp_model *prof;
	struct libusb_device_descriptor des;
	struct libusb_device_handle *hdl;
	libusb_device **devlist;
	GSList *devices;
	int ret, i, j;
	const struct zp_model *check;
	char serial_num[64], connection_id[64];

	(void)options;

	drvc = di->context;

	devices = NULL;

	/* Find all ZEROPLUS analyzers and add them to device list. */
	libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist); /* TODO: Errors. */

	for (i = 0; devlist[i]; i++) {
		libusb_get_device_descriptor(devlist[i], &des);

		/*
		 * Check for expected VID:PID first as soon as we got
		 * the descriptor's content. This avoids access to flaky
		 * unrelated devices which trouble the application even
		 * if they are unrelated to measurement purposes.
		 *
		 * See https://sigrok.org/bugzilla/show_bug.cgi?id=1115
		 * and https://github.com/sigrokproject/libsigrok/pull/165
		 * for a discussion.
		 */
		prof = NULL;
		for (j = 0; zeroplus_models[j].vid; j++) {
			check = &zeroplus_models[j];
			if (des.idVendor != check->vid)
				continue;
			if (des.idProduct != check->pid)
				continue;
			prof = check;
			break;
		}
		if (!prof)
			continue;

		/* Get the device's serial number from USB strings. */
		if ((ret = libusb_open(devlist[i], &hdl)) < 0)
			continue;

		if (des.iSerialNumber == 0) {
			serial_num[0] = '\0';
		} else if ((ret = libusb_get_string_descriptor_ascii(hdl,
				des.iSerialNumber, (unsigned char *) serial_num,
				sizeof(serial_num))) < 0) {
			sr_warn("Failed to get serial number string descriptor: %s.",
				libusb_error_name(ret));
			continue;
		}

		libusb_close(hdl);

		if (usb_get_port_path(devlist[i], connection_id, sizeof(connection_id)) < 0)
			continue;

		sr_info("Found ZEROPLUS %s.", prof->model_name);

		sdi = g_malloc0(sizeof(struct sr_dev_inst));
		sdi->status = SR_ST_INACTIVE;
		sdi->vendor = g_strdup("ZEROPLUS");
		sdi->model = g_strdup(prof->model_name);
		sdi->serial_num = g_strdup(serial_num);
		sdi->connection_id = g_strdup(connection_id);

		devc = g_malloc0(sizeof(struct dev_context));
		sdi->priv = devc;
		devc->prof = prof;
		devc->num_channels = prof->channels;
#ifdef ZP_EXPERIMENTAL
		devc->max_sample_depth = 128 * 1024;
		devc->max_samplerate = 200;
#else
		devc->max_sample_depth = prof->sample_depth * 1024;
		devc->max_samplerate = prof->max_sampling_freq;
#endif
		devc->max_samplerate *= SR_MHZ(1);
		devc->memory_size = MEMORY_SIZE_8K;
		// memset(devc->trigger_buffer, 0, NUM_TRIGGER_STAGES);

		for (j = 0; j < devc->num_channels; j++)
			sr_channel_new(sdi, j, SR_CHANNEL_LOGIC, TRUE,
					channel_names[j]);

		devices = g_slist_append(devices, sdi);
		sdi->inst_type = SR_INST_USB;
		sdi->conn = sr_usb_dev_inst_new(
			libusb_get_bus_number(devlist[i]),
			libusb_get_device_address(devlist[i]), NULL);
	}
	libusb_free_device_list(devlist, 1);

	return std_scan_complete(di, devices);
}

static int dev_open(struct sr_dev_inst *sdi)
{
	struct sr_dev_driver *di = sdi->driver;
	struct dev_context *devc;
	struct drv_context *drvc;
	struct sr_usb_dev_inst *usb;
	int ret;

	drvc = di->context;
	usb = sdi->conn;
	devc = sdi->priv;

	ret = sr_usb_open(drvc->sr_ctx->libusb_ctx, usb);
	if (ret != SR_OK)
		return ret;

	ret = libusb_set_configuration(usb->devhdl, USB_CONFIGURATION);
	if (ret < 0) {
		sr_err("Unable to set USB configuration %d: %s.",
		       USB_CONFIGURATION, libusb_error_name(ret));
		return SR_ERR;
	}

	ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
	if (ret != 0) {
		sr_err("Unable to claim interface: %s.",
		       libusb_error_name(ret));
		return SR_ERR;
	}

	/* Set default configuration after power on. */
	if (analyzer_read_status(usb->devhdl) == 0)
		analyzer_configure(usb->devhdl);

	analyzer_reset(usb->devhdl);
	analyzer_initialize(usb->devhdl);

	//analyzer_set_memory_size(MEMORY_SIZE_512K);
	// analyzer_set_freq(g_freq, g_freq_scale);
	analyzer_set_trigger_count(1);
	// analyzer_set_ramsize_trigger_address((((100 - g_pre_trigger)
	// * get_memory_size(g_memory_size)) / 100) >> 2);

#if 0
	if (g_double_mode == 1)
		analyzer_set_compression(COMPRESSION_DOUBLE);
	else if (g_compression == 1)
		analyzer_set_compression(COMPRESSION_ENABLE);
	else
#endif
	analyzer_set_compression(COMPRESSION_NONE);

	if (devc->cur_samplerate == 0) {
		/* Samplerate hasn't been set. Default to 1MHz. */
		analyzer_set_freq(1, FREQ_SCALE_MHZ);
		devc->cur_samplerate = SR_MHZ(1);
	}

	if (devc->cur_threshold == 0)
		set_voltage_threshold(devc, 1.5);

	return SR_OK;
}

static int dev_close(struct sr_dev_inst *sdi)
{
	struct sr_usb_dev_inst *usb;

	usb = sdi->conn;

	if (!usb->devhdl)
		return SR_ERR_BUG;

	sr_info("Closing device on %d.%d (logical) / %s (physical) interface %d.",
		usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
	libusb_release_interface(usb->devhdl, USB_INTERFACE);
	libusb_reset_device(usb->devhdl);
	libusb_close(usb->devhdl);
	usb->devhdl = NULL;

	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_ARG;

	devc = sdi->priv;

	switch (key) {
	case SR_CONF_SAMPLERATE:
		*data = g_variant_new_uint64(devc->cur_samplerate);
		break;
	case SR_CONF_CAPTURE_RATIO:
		*data = g_variant_new_uint64(devc->capture_ratio);
		break;
	case SR_CONF_VOLTAGE_THRESHOLD:
		*data = std_gvar_tuple_double(devc->cur_threshold, devc->cur_threshold);
		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;
	gdouble low, high;

	(void)cg;

	devc = sdi->priv;

	switch (key) {
	case SR_CONF_SAMPLERATE:
		return zp_set_samplerate(devc, g_variant_get_uint64(data));
	case SR_CONF_LIMIT_SAMPLES:
		return set_limit_samples(devc, g_variant_get_uint64(data));
	case SR_CONF_CAPTURE_RATIO:
		devc->capture_ratio = g_variant_get_uint64(data);
		break;
	case SR_CONF_VOLTAGE_THRESHOLD:
		g_variant_get(data, "(dd)", &low, &high);
		return set_voltage_threshold(devc, (low + high) / 2.0);
	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)
{
	struct dev_context *devc;

	switch (key) {
	case SR_CONF_DEVICE_OPTIONS:
		return STD_CONFIG_LIST(key, data, sdi, cg, NO_OPTS, drvopts, devopts);
	case SR_CONF_SAMPLERATE:
		devc = sdi->priv;
		if (devc->prof->max_sampling_freq == 100)
			*data = std_gvar_samplerates(ARRAY_AND_SIZE(samplerates_100));
		else if (devc->prof->max_sampling_freq == 200)
			*data = std_gvar_samplerates(ARRAY_AND_SIZE(samplerates_200));
		else {
			sr_err("Internal error: Unknown max. samplerate: %d.",
			       devc->prof->max_sampling_freq);
			return SR_ERR_ARG;
		}
		break;
	case SR_CONF_TRIGGER_MATCH:
		*data = std_gvar_array_i32(ARRAY_AND_SIZE(trigger_matches));
		break;
	case SR_CONF_VOLTAGE_THRESHOLD:
		*data = std_gvar_min_max_step_thresholds(-6.0, 6.0, 0.1);
		break;
	case SR_CONF_LIMIT_SAMPLES:
		if (!sdi)
			return SR_ERR_ARG;
		devc = sdi->priv;
		*data = std_gvar_tuple_u64(0, devc->max_sample_depth);
		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 sr_usb_dev_inst *usb;
	struct sr_datafeed_packet packet;
	struct sr_datafeed_logic logic;
	unsigned int samples_read;
	int res;
	unsigned int packet_num, n;
	unsigned char *buf;
	unsigned int status;
	unsigned int stop_address;
	unsigned int now_address;
	unsigned int trigger_address;
	unsigned int trigger_offset;
	unsigned int triggerbar;
	unsigned int ramsize_trigger;
	unsigned int memory_size;
	unsigned int valid_samples;
	unsigned int discard;
	int trigger_now;

	devc = sdi->priv;

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

	usb = sdi->conn;

	set_triggerbar(devc);

	/* Push configured settings to device. */
	analyzer_configure(usb->devhdl);

	analyzer_start(usb->devhdl);
	sr_info("Waiting for data.");
	analyzer_wait_data(usb->devhdl);

	status = analyzer_read_status(usb->devhdl);
	stop_address = analyzer_get_stop_address(usb->devhdl);
	now_address = analyzer_get_now_address(usb->devhdl);
	trigger_address = analyzer_get_trigger_address(usb->devhdl);

	triggerbar = analyzer_get_triggerbar_address();
	ramsize_trigger = analyzer_get_ramsize_trigger_address();

	n = get_memory_size(devc->memory_size);
	memory_size = n / 4;

	sr_info("Status = 0x%x.", status);
	sr_info("Stop address       = 0x%x.", stop_address);
	sr_info("Now address        = 0x%x.", now_address);
	sr_info("Trigger address    = 0x%x.", trigger_address);
	sr_info("Triggerbar address = 0x%x.", triggerbar);
	sr_info("Ramsize trigger    = 0x%x.", ramsize_trigger);
	sr_info("Memory size        = 0x%x.", memory_size);

	std_session_send_df_header(sdi);

	/* Check for empty capture */
	if ((status & STATUS_READY) && !stop_address) {
		std_session_send_df_end(sdi);
		return SR_OK;
	}

	buf = g_malloc(PACKET_SIZE);

	/* Check if the trigger is in the samples we are throwing away */
	trigger_now = now_address == trigger_address ||
		((now_address + 1) % memory_size) == trigger_address;

	/*
	 * STATUS_READY doesn't clear until now_address advances past
	 * addr 0, but for our logic, clear it in that case
	 */
	if (!now_address)
		status &= ~STATUS_READY;

	analyzer_read_start(usb->devhdl);

	/* Calculate how much data to discard */
	discard = 0;
	if (status & STATUS_READY) {
		/*
		 * We haven't wrapped around, we need to throw away data from
		 * our current position to the end of the buffer.
		 * Additionally, the first two samples captured are always
		 * bogus.
		 */
		discard += memory_size - now_address + 2;
		now_address = 2;
	}

	/* If we have more samples than we need, discard them */
	valid_samples = (stop_address - now_address) % memory_size;
	if (valid_samples > ramsize_trigger + triggerbar) {
		discard += valid_samples - (ramsize_trigger + triggerbar);
		now_address += valid_samples - (ramsize_trigger + triggerbar);
	}

	sr_info("Need to discard %d samples.", discard);

	/* Calculate how far in the trigger is */
	if (trigger_now)
		trigger_offset = 0;
	else
		trigger_offset = (trigger_address - now_address) % memory_size;

	/* Recalculate the number of samples available */
	valid_samples = (stop_address - now_address) % memory_size;

	/* Send the incoming transfer to the session bus. */
	samples_read = 0;
	for (packet_num = 0; packet_num < n / PACKET_SIZE; packet_num++) {
		unsigned int len;
		unsigned int buf_offset;

		res = analyzer_read_data(usb->devhdl, buf, PACKET_SIZE);
		if (res != PACKET_SIZE)
			sr_warn("Tried to read %d bytes, actually read %d.",
				PACKET_SIZE, res);

		if (discard >= PACKET_SIZE / 4) {
			discard -= PACKET_SIZE / 4;
			continue;
		}

		len = PACKET_SIZE - discard * 4;
		buf_offset = discard * 4;
		discard = 0;

		/* Check if we've read all the samples */
		if (samples_read + len / 4 >= valid_samples)
			len = (valid_samples - samples_read) * 4;
		if (!len)
			break;

		if (samples_read < trigger_offset &&
		    samples_read + len / 4 > trigger_offset) {
			/* Send out samples remaining before trigger */
			packet.type = SR_DF_LOGIC;
			packet.payload = &logic;
			logic.length = (trigger_offset - samples_read) * 4;
			logic.unitsize = 4;
			logic.data = buf + buf_offset;
			sr_session_send(sdi, &packet);
			len -= logic.length;
			samples_read += logic.length / 4;
			buf_offset += logic.length;
		}

		if (samples_read == trigger_offset)
			std_session_send_df_trigger(sdi);

		/* Send out data (or data after trigger) */
		packet.type = SR_DF_LOGIC;
		packet.payload = &logic;
		logic.length = len;
		logic.unitsize = 4;
		logic.data = buf + buf_offset;
		sr_session_send(sdi, &packet);
		samples_read += len / 4;
	}
	analyzer_read_stop(usb->devhdl);
	g_free(buf);

	std_session_send_df_end(sdi);

	return SR_OK;
}

static int dev_acquisition_stop(struct sr_dev_inst *sdi)
{
	struct sr_usb_dev_inst *usb;

	std_session_send_df_end(sdi);

	usb = sdi->conn;
	analyzer_reset(usb->devhdl);
	/* TODO: Need to cancel and free any queued up transfers. */

	return SR_OK;
}

static struct sr_dev_driver zeroplus_logic_cube_driver_info = {
	.name = "zeroplus-logic-cube",
	.longname = "ZEROPLUS Logic Cube LAP-C series",
	.api_version = 1,
	.init = std_init,
	.cleanup = std_cleanup,
	.scan = scan,
	.dev_list = std_dev_list,
	.dev_clear = std_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(zeroplus_logic_cube_driver_info);
Commit	Line	Data
	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2010-2012 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 <config.h>
	21	#include "protocol.h"
	22
	23	#define USB_INTERFACE 0
	24	#define USB_CONFIGURATION 1
	25	#define NUM_TRIGGER_STAGES 4
	26	#define PACKET_SIZE 2048 /* ?? */
	27
	28	//#define ZP_EXPERIMENTAL
	29
	30	struct zp_model {
	31	uint16_t vid;
	32	uint16_t pid;
	33	const char *model_name;
	34	unsigned int channels;
	35	unsigned int sample_depth; /* In Ksamples/channel */
	36	unsigned int max_sampling_freq;
	37	};
	38
	39	/*
	40	* Note -- 16032, 16064 and 16128 usually -- but not always -- have the
	41	* same 128K sample depth.
	42	*/
	43	static const struct zp_model zeroplus_models[] = {
	44	{0x0c12, 0x7002, "LAP-16128U", 16, 128, 200},
	45	{0x0c12, 0x7007, "LAP-16032U", 16, 32, 200},
	46	{0x0c12, 0x7009, "LAP-C(16064)", 16, 64, 100},
	47	{0x0c12, 0x700a, "LAP-C(16128)", 16, 128, 200},
	48	{0x0c12, 0x700b, "LAP-C(32128)", 32, 128, 200},
	49	{0x0c12, 0x700c, "LAP-C(321000)", 32, 1024, 200},
	50	{0x0c12, 0x700d, "LAP-C(322000)", 32, 2048, 200},
	51	{0x0c12, 0x700e, "LAP-C(16032)", 16, 32, 100},
	52	{0x0c12, 0x7016, "LAP-C(162000)", 16, 2048, 200},
	53	{0x0c12, 0x7025, "LAP-C(16128+)", 16, 128, 200},
	54	{0x0c12, 0x7064, "Logian-16L", 16, 128, 200},
	55	{0x0c12, 0x7100, "AKIP-9101", 16, 256, 200},
	56	ALL_ZERO
	57	};
	58
	59	static const uint32_t drvopts[] = {
	60	SR_CONF_LOGIC_ANALYZER,
	61	};
	62
	63	static const uint32_t devopts[] = {
	64	SR_CONF_LIMIT_SAMPLES \| SR_CONF_SET \| SR_CONF_LIST,
	65	SR_CONF_SAMPLERATE \| SR_CONF_GET \| SR_CONF_SET \| SR_CONF_LIST,
	66	SR_CONF_TRIGGER_MATCH \| SR_CONF_LIST,
	67	SR_CONF_CAPTURE_RATIO \| SR_CONF_GET \| SR_CONF_SET,
	68	SR_CONF_VOLTAGE_THRESHOLD \| SR_CONF_GET \| SR_CONF_SET \| SR_CONF_LIST,
	69	};
	70
	71	static const int32_t trigger_matches[] = {
	72	SR_TRIGGER_ZERO,
	73	SR_TRIGGER_ONE,
	74	SR_TRIGGER_RISING,
	75	SR_TRIGGER_FALLING,
	76	SR_TRIGGER_EDGE,
	77	};
	78
	79	/*
	80	* ZEROPLUS LAP-C (16032) numbers the 16 channels A0-A7 and B0-B7.
	81	* We currently ignore other untested/unsupported devices here.
	82	*/
	83	static const char *channel_names[] = {
	84	"A0", "A1", "A2", "A3", "A4", "A5", "A6", "A7",
	85	"B0", "B1", "B2", "B3", "B4", "B5", "B6", "B7",
	86	"C0", "C1", "C2", "C3", "C4", "C5", "C6", "C7",
	87	"D0", "D1", "D2", "D3", "D4", "D5", "D6", "D7",
	88	};
	89
	90	/*
	91	* The hardware supports more samplerates than these, but these are the
	92	* options hardcoded into the vendor's Windows GUI.
	93	*/
	94
	95	static const uint64_t samplerates_100[] = {
	96	SR_HZ(100),
	97	SR_HZ(500),
	98	SR_KHZ(1),
	99	SR_KHZ(5),
	100	SR_KHZ(25),
	101	SR_KHZ(50),
	102	SR_KHZ(100),
	103	SR_KHZ(200),
	104	SR_KHZ(400),
	105	SR_KHZ(800),
	106	SR_MHZ(1),
	107	SR_MHZ(10),
	108	SR_MHZ(25),
	109	SR_MHZ(50),
	110	SR_MHZ(80),
	111	SR_MHZ(100),
	112	};
	113
	114	const uint64_t samplerates_200[] = {
	115	SR_HZ(100),
	116	SR_HZ(500),
	117	SR_KHZ(1),
	118	SR_KHZ(5),
	119	SR_KHZ(25),
	120	SR_KHZ(50),
	121	SR_KHZ(100),
	122	SR_KHZ(200),
	123	SR_KHZ(400),
	124	SR_KHZ(800),
	125	SR_MHZ(1),
	126	SR_MHZ(10),
	127	SR_MHZ(25),
	128	SR_MHZ(50),
	129	SR_MHZ(80),
	130	SR_MHZ(100),
	131	SR_MHZ(150),
	132	SR_MHZ(200),
	133	};
	134
	135	SR_PRIV int zp_set_samplerate(struct dev_context *devc, uint64_t samplerate)
	136	{
	137	int i;
	138
	139	for (i = 0; ARRAY_SIZE(samplerates_200); i++)
	140	if (samplerate == samplerates_200[i])
	141	break;
	142
	143	if (i == ARRAY_SIZE(samplerates_200) \|\| samplerate > devc->max_samplerate) {
	144	sr_err("Unsupported samplerate: %" PRIu64 "Hz.", samplerate);
	145	return SR_ERR_ARG;
	146	}
	147
	148	sr_info("Setting samplerate to %" PRIu64 "Hz.", samplerate);
	149
	150	if (samplerate >= SR_MHZ(1))
	151	analyzer_set_freq(samplerate / SR_MHZ(1), FREQ_SCALE_MHZ);
	152	else if (samplerate >= SR_KHZ(1))
	153	analyzer_set_freq(samplerate / SR_KHZ(1), FREQ_SCALE_KHZ);
	154	else
	155	analyzer_set_freq(samplerate, FREQ_SCALE_HZ);
	156
	157	devc->cur_samplerate = samplerate;
	158
	159	return SR_OK;
	160	}
	161
	162	static GSList scan(struct sr_dev_driver di, GSList *options)
	163	{
	164	struct sr_dev_inst *sdi;
	165	struct drv_context *drvc;
	166	struct dev_context *devc;
	167	const struct zp_model *prof;
	168	struct libusb_device_descriptor des;
	169	struct libusb_device_handle *hdl;
	170	libusb_device **devlist;
	171	GSList *devices;
	172	int ret, i, j;
	173	const struct zp_model *check;
	174	char serial_num[64], connection_id[64];
	175
	176	(void)options;
	177
	178	drvc = di->context;
	179
	180	devices = NULL;
	181
	182	/* Find all ZEROPLUS analyzers and add them to device list. */
	183	libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist); /* TODO: Errors. */
	184
	185	for (i = 0; devlist[i]; i++) {
	186	libusb_get_device_descriptor(devlist[i], &des);
	187
	188	/*
	189	* Check for expected VID:PID first as soon as we got
	190	* the descriptor's content. This avoids access to flaky
	191	* unrelated devices which trouble the application even
	192	* if they are unrelated to measurement purposes.
	193	*
	194	* See https://sigrok.org/bugzilla/show_bug.cgi?id=1115
	195	* and https://github.com/sigrokproject/libsigrok/pull/165
	196	* for a discussion.
	197	*/
	198	prof = NULL;
	199	for (j = 0; zeroplus_models[j].vid; j++) {
	200	check = &zeroplus_models[j];
	201	if (des.idVendor != check->vid)
	202	continue;
	203	if (des.idProduct != check->pid)
	204	continue;
	205	prof = check;
	206	break;
	207	}
	208	if (!prof)
	209	continue;
	210
	211	/* Get the device's serial number from USB strings. */
	212	if ((ret = libusb_open(devlist[i], &hdl)) < 0)
	213	continue;
	214
	215	if (des.iSerialNumber == 0) {
	216	serial_num[0] = '\0';
	217	} else if ((ret = libusb_get_string_descriptor_ascii(hdl,
	218	des.iSerialNumber, (unsigned char *) serial_num,
	219	sizeof(serial_num))) < 0) {
	220	sr_warn("Failed to get serial number string descriptor: %s.",
	221	libusb_error_name(ret));
	222	continue;
	223	}
	224
	225	libusb_close(hdl);
	226
	227	if (usb_get_port_path(devlist[i], connection_id, sizeof(connection_id)) < 0)
	228	continue;
	229
	230	sr_info("Found ZEROPLUS %s.", prof->model_name);
	231
	232	sdi = g_malloc0(sizeof(struct sr_dev_inst));
	233	sdi->status = SR_ST_INACTIVE;
	234	sdi->vendor = g_strdup("ZEROPLUS");
	235	sdi->model = g_strdup(prof->model_name);
	236	sdi->serial_num = g_strdup(serial_num);
	237	sdi->connection_id = g_strdup(connection_id);
	238
	239	devc = g_malloc0(sizeof(struct dev_context));
	240	sdi->priv = devc;
	241	devc->prof = prof;
	242	devc->num_channels = prof->channels;
	243	#ifdef ZP_EXPERIMENTAL
	244	devc->max_sample_depth = 128 * 1024;
	245	devc->max_samplerate = 200;
	246	#else
	247	devc->max_sample_depth = prof->sample_depth * 1024;
	248	devc->max_samplerate = prof->max_sampling_freq;
	249	#endif
	250	devc->max_samplerate *= SR_MHZ(1);
	251	devc->memory_size = MEMORY_SIZE_8K;
	252	// memset(devc->trigger_buffer, 0, NUM_TRIGGER_STAGES);
	253
	254	for (j = 0; j < devc->num_channels; j++)
	255	sr_channel_new(sdi, j, SR_CHANNEL_LOGIC, TRUE,
	256	channel_names[j]);
	257
	258	devices = g_slist_append(devices, sdi);
	259	sdi->inst_type = SR_INST_USB;
	260	sdi->conn = sr_usb_dev_inst_new(
	261	libusb_get_bus_number(devlist[i]),
	262	libusb_get_device_address(devlist[i]), NULL);
	263	}
	264	libusb_free_device_list(devlist, 1);
	265
	266	return std_scan_complete(di, devices);
	267	}
	268
	269	static int dev_open(struct sr_dev_inst *sdi)
	270	{
	271	struct sr_dev_driver *di = sdi->driver;
	272	struct dev_context *devc;
	273	struct drv_context *drvc;
	274	struct sr_usb_dev_inst *usb;
	275	int ret;
	276
	277	drvc = di->context;
	278	usb = sdi->conn;
	279	devc = sdi->priv;
	280
	281	ret = sr_usb_open(drvc->sr_ctx->libusb_ctx, usb);
	282	if (ret != SR_OK)
	283	return ret;
	284
	285	ret = libusb_set_configuration(usb->devhdl, USB_CONFIGURATION);
	286	if (ret < 0) {
	287	sr_err("Unable to set USB configuration %d: %s.",
	288	USB_CONFIGURATION, libusb_error_name(ret));
	289	return SR_ERR;
	290	}
	291
	292	ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
	293	if (ret != 0) {
	294	sr_err("Unable to claim interface: %s.",
	295	libusb_error_name(ret));
	296	return SR_ERR;
	297	}
	298
	299	/* Set default configuration after power on. */
	300	if (analyzer_read_status(usb->devhdl) == 0)
	301	analyzer_configure(usb->devhdl);
	302
	303	analyzer_reset(usb->devhdl);
	304	analyzer_initialize(usb->devhdl);
	305
	306	//analyzer_set_memory_size(MEMORY_SIZE_512K);
	307	// analyzer_set_freq(g_freq, g_freq_scale);
	308	analyzer_set_trigger_count(1);
	309	// analyzer_set_ramsize_trigger_address((((100 - g_pre_trigger)
	310	// * get_memory_size(g_memory_size)) / 100) >> 2);
	311
	312	#if 0
	313	if (g_double_mode == 1)
	314	analyzer_set_compression(COMPRESSION_DOUBLE);
	315	else if (g_compression == 1)
	316	analyzer_set_compression(COMPRESSION_ENABLE);
	317	else
	318	#endif
	319	analyzer_set_compression(COMPRESSION_NONE);
	320
	321	if (devc->cur_samplerate == 0) {
	322	/* Samplerate hasn't been set. Default to 1MHz. */
	323	analyzer_set_freq(1, FREQ_SCALE_MHZ);
	324	devc->cur_samplerate = SR_MHZ(1);
	325	}
	326
	327	if (devc->cur_threshold == 0)
	328	set_voltage_threshold(devc, 1.5);
	329
	330	return SR_OK;
	331	}
	332
	333	static int dev_close(struct sr_dev_inst *sdi)
	334	{
	335	struct sr_usb_dev_inst *usb;
	336
	337	usb = sdi->conn;
	338
	339	if (!usb->devhdl)
	340	return SR_ERR_BUG;
	341
	342	sr_info("Closing device on %d.%d (logical) / %s (physical) interface %d.",
	343	usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
	344	libusb_release_interface(usb->devhdl, USB_INTERFACE);
	345	libusb_reset_device(usb->devhdl);
	346	libusb_close(usb->devhdl);
	347	usb->devhdl = NULL;
	348
	349	return SR_OK;
	350	}
	351
	352	static int config_get(uint32_t key, GVariant **data,
	353	const struct sr_dev_inst sdi, const struct sr_channel_group cg)
	354	{
	355	struct dev_context *devc;
	356
	357	(void)cg;
	358
	359	if (!sdi)
	360	return SR_ERR_ARG;
	361
	362	devc = sdi->priv;
	363
	364	switch (key) {
	365	case SR_CONF_SAMPLERATE:
	366	*data = g_variant_new_uint64(devc->cur_samplerate);
	367	break;
	368	case SR_CONF_CAPTURE_RATIO:
	369	*data = g_variant_new_uint64(devc->capture_ratio);
	370	break;
	371	case SR_CONF_VOLTAGE_THRESHOLD:
	372	*data = std_gvar_tuple_double(devc->cur_threshold, devc->cur_threshold);
	373	break;
	374	default:
	375	return SR_ERR_NA;
	376	}
	377
	378	return SR_OK;
	379	}
	380
	381	static int config_set(uint32_t key, GVariant *data,
	382	const struct sr_dev_inst sdi, const struct sr_channel_group cg)
	383	{
	384	struct dev_context *devc;
	385	gdouble low, high;
	386
	387	(void)cg;
	388
	389	devc = sdi->priv;
	390
	391	switch (key) {
	392	case SR_CONF_SAMPLERATE:
	393	return zp_set_samplerate(devc, g_variant_get_uint64(data));
	394	case SR_CONF_LIMIT_SAMPLES:
	395	return set_limit_samples(devc, g_variant_get_uint64(data));
	396	case SR_CONF_CAPTURE_RATIO:
	397	devc->capture_ratio = g_variant_get_uint64(data);
	398	break;
	399	case SR_CONF_VOLTAGE_THRESHOLD:
	400	g_variant_get(data, "(dd)", &low, &high);
	401	return set_voltage_threshold(devc, (low + high) / 2.0);
	402	default:
	403	return SR_ERR_NA;
	404	}
	405
	406	return SR_OK;
	407	}
	408
	409	static int config_list(uint32_t key, GVariant **data,
	410	const struct sr_dev_inst sdi, const struct sr_channel_group cg)
	411	{
	412	struct dev_context *devc;
	413
	414	switch (key) {
	415	case SR_CONF_DEVICE_OPTIONS:
	416	return STD_CONFIG_LIST(key, data, sdi, cg, NO_OPTS, drvopts, devopts);
	417	case SR_CONF_SAMPLERATE:
	418	devc = sdi->priv;
	419	if (devc->prof->max_sampling_freq == 100)
	420	*data = std_gvar_samplerates(ARRAY_AND_SIZE(samplerates_100));
	421	else if (devc->prof->max_sampling_freq == 200)
	422	*data = std_gvar_samplerates(ARRAY_AND_SIZE(samplerates_200));
	423	else {
	424	sr_err("Internal error: Unknown max. samplerate: %d.",
	425	devc->prof->max_sampling_freq);
	426	return SR_ERR_ARG;
	427	}
	428	break;
	429	case SR_CONF_TRIGGER_MATCH:
	430	*data = std_gvar_array_i32(ARRAY_AND_SIZE(trigger_matches));
	431	break;
	432	case SR_CONF_VOLTAGE_THRESHOLD:
	433	*data = std_gvar_min_max_step_thresholds(-6.0, 6.0, 0.1);
	434	break;
	435	case SR_CONF_LIMIT_SAMPLES:
	436	if (!sdi)
	437	return SR_ERR_ARG;
	438	devc = sdi->priv;
	439	*data = std_gvar_tuple_u64(0, devc->max_sample_depth);
	440	break;
	441	default:
	442	return SR_ERR_NA;
	443	}
	444
	445	return SR_OK;
	446	}
	447
	448	static int dev_acquisition_start(const struct sr_dev_inst *sdi)
	449	{
	450	struct dev_context *devc;
	451	struct sr_usb_dev_inst *usb;
	452	struct sr_datafeed_packet packet;
	453	struct sr_datafeed_logic logic;
	454	unsigned int samples_read;
	455	int res;
	456	unsigned int packet_num, n;
	457	unsigned char *buf;
	458	unsigned int status;
	459	unsigned int stop_address;
	460	unsigned int now_address;
	461	unsigned int trigger_address;
	462	unsigned int trigger_offset;
	463	unsigned int triggerbar;
	464	unsigned int ramsize_trigger;
	465	unsigned int memory_size;
	466	unsigned int valid_samples;
	467	unsigned int discard;
	468	int trigger_now;
	469
	470	devc = sdi->priv;
	471
	472	if (analyzer_add_triggers(sdi) != SR_OK) {
	473	sr_err("Failed to configure triggers.");
	474	return SR_ERR;
	475	}
	476
	477	usb = sdi->conn;
	478
	479	set_triggerbar(devc);
	480
	481	/* Push configured settings to device. */
	482	analyzer_configure(usb->devhdl);
	483
	484	analyzer_start(usb->devhdl);
	485	sr_info("Waiting for data.");
	486	analyzer_wait_data(usb->devhdl);
	487
	488	status = analyzer_read_status(usb->devhdl);
	489	stop_address = analyzer_get_stop_address(usb->devhdl);
	490	now_address = analyzer_get_now_address(usb->devhdl);
	491	trigger_address = analyzer_get_trigger_address(usb->devhdl);
	492
	493	triggerbar = analyzer_get_triggerbar_address();
	494	ramsize_trigger = analyzer_get_ramsize_trigger_address();
	495
	496	n = get_memory_size(devc->memory_size);
	497	memory_size = n / 4;
	498
	499	sr_info("Status = 0x%x.", status);
	500	sr_info("Stop address = 0x%x.", stop_address);
	501	sr_info("Now address = 0x%x.", now_address);
	502	sr_info("Trigger address = 0x%x.", trigger_address);
	503	sr_info("Triggerbar address = 0x%x.", triggerbar);
	504	sr_info("Ramsize trigger = 0x%x.", ramsize_trigger);
	505	sr_info("Memory size = 0x%x.", memory_size);
	506
	507	std_session_send_df_header(sdi);
	508
	509	/* Check for empty capture */
	510	if ((status & STATUS_READY) && !stop_address) {
	511	std_session_send_df_end(sdi);
	512	return SR_OK;
	513	}
	514
	515	buf = g_malloc(PACKET_SIZE);
	516
	517	/* Check if the trigger is in the samples we are throwing away */
	518	trigger_now = now_address == trigger_address \|\|
	519	((now_address + 1) % memory_size) == trigger_address;
	520
	521	/*
	522	* STATUS_READY doesn't clear until now_address advances past
	523	* addr 0, but for our logic, clear it in that case
	524	*/
	525	if (!now_address)
	526	status &= ~STATUS_READY;
	527
	528	analyzer_read_start(usb->devhdl);
	529
	530	/* Calculate how much data to discard */
	531	discard = 0;
	532	if (status & STATUS_READY) {
	533	/*
	534	* We haven't wrapped around, we need to throw away data from
	535	* our current position to the end of the buffer.
	536	* Additionally, the first two samples captured are always
	537	* bogus.
	538	*/
	539	discard += memory_size - now_address + 2;
	540	now_address = 2;
	541	}
	542
	543	/* If we have more samples than we need, discard them */
	544	valid_samples = (stop_address - now_address) % memory_size;
	545	if (valid_samples > ramsize_trigger + triggerbar) {
	546	discard += valid_samples - (ramsize_trigger + triggerbar);
	547	now_address += valid_samples - (ramsize_trigger + triggerbar);
	548	}
	549
	550	sr_info("Need to discard %d samples.", discard);
	551
	552	/* Calculate how far in the trigger is */
	553	if (trigger_now)
	554	trigger_offset = 0;
	555	else
	556	trigger_offset = (trigger_address - now_address) % memory_size;
	557
	558	/* Recalculate the number of samples available */
	559	valid_samples = (stop_address - now_address) % memory_size;
	560
	561	/* Send the incoming transfer to the session bus. */
	562	samples_read = 0;
	563	for (packet_num = 0; packet_num < n / PACKET_SIZE; packet_num++) {
	564	unsigned int len;
	565	unsigned int buf_offset;
	566
	567	res = analyzer_read_data(usb->devhdl, buf, PACKET_SIZE);
	568	if (res != PACKET_SIZE)
	569	sr_warn("Tried to read %d bytes, actually read %d.",
	570	PACKET_SIZE, res);
	571
	572	if (discard >= PACKET_SIZE / 4) {
	573	discard -= PACKET_SIZE / 4;
	574	continue;
	575	}
	576
	577	len = PACKET_SIZE - discard * 4;
	578	buf_offset = discard * 4;
	579	discard = 0;
	580
	581	/* Check if we've read all the samples */
	582	if (samples_read + len / 4 >= valid_samples)
	583	len = (valid_samples - samples_read) * 4;
	584	if (!len)
	585	break;
	586
	587	if (samples_read < trigger_offset &&
	588	samples_read + len / 4 > trigger_offset) {
	589	/* Send out samples remaining before trigger */
	590	packet.type = SR_DF_LOGIC;
	591	packet.payload = &logic;
	592	logic.length = (trigger_offset - samples_read) * 4;
	593	logic.unitsize = 4;
	594	logic.data = buf + buf_offset;
	595	sr_session_send(sdi, &packet);
	596	len -= logic.length;
	597	samples_read += logic.length / 4;
	598	buf_offset += logic.length;
	599	}
	600
	601	if (samples_read == trigger_offset)
	602	std_session_send_df_trigger(sdi);
	603
	604	/* Send out data (or data after trigger) */
	605	packet.type = SR_DF_LOGIC;
	606	packet.payload = &logic;
	607	logic.length = len;
	608	logic.unitsize = 4;
	609	logic.data = buf + buf_offset;
	610	sr_session_send(sdi, &packet);
	611	samples_read += len / 4;
	612	}
	613	analyzer_read_stop(usb->devhdl);
	614	g_free(buf);
	615
	616	std_session_send_df_end(sdi);
	617
	618	return SR_OK;
	619	}
	620
	621	static int dev_acquisition_stop(struct sr_dev_inst *sdi)
	622	{
	623	struct sr_usb_dev_inst *usb;
	624
	625	std_session_send_df_end(sdi);
	626
	627	usb = sdi->conn;
	628	analyzer_reset(usb->devhdl);
	629	/* TODO: Need to cancel and free any queued up transfers. */
	630
	631	return SR_OK;
	632	}
	633
	634	static struct sr_dev_driver zeroplus_logic_cube_driver_info = {
	635	.name = "zeroplus-logic-cube",
	636	.longname = "ZEROPLUS Logic Cube LAP-C series",
	637	.api_version = 1,
	638	.init = std_init,
	639	.cleanup = std_cleanup,
	640	.scan = scan,
	641	.dev_list = std_dev_list,
	642	.dev_clear = std_dev_clear,
	643	.config_get = config_get,
	644	.config_set = config_set,
	645	.config_list = config_list,
	646	.dev_open = dev_open,
	647	.dev_close = dev_close,
	648	.dev_acquisition_start = dev_acquisition_start,
	649	.dev_acquisition_stop = dev_acquisition_stop,
	650	.context = NULL,
	651	};
	652	SR_REGISTER_DEV_DRIVER(zeroplus_logic_cube_driver_info);