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

/*
 * This file is part of the sigrok project.
 *
 * Copyright (C) 2010 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 <stdio.h>
#include <stdlib.h>
#include <sys/time.h>
#include <inttypes.h>
#include <glib.h>
#include <libusb.h>
#include <sigrok.h>
#include <sigrok-internal.h>
#include "analyzer.h"

#define USB_VENDOR			0x0c12
#define USB_VENDOR_NAME			"Zeroplus"
#define USB_MODEL_NAME			"Logic Cube"
#define USB_MODEL_VERSION		""

#define USB_INTERFACE			0
#define USB_CONFIGURATION		1
#define NUM_TRIGGER_STAGES		4
#define TRIGGER_TYPES			"01"

#define PACKET_SIZE			2048	/* ?? */

typedef struct {
	unsigned short pid;
	char model_name[64];
	unsigned int channels;
	unsigned int sample_depth;	/* In Ksamples/channel */
	unsigned int max_sampling_freq;
} model_t;

/*
 * Note -- 16032, 16064 and 16128 *usually* -- but not always -- have the
 * same 128K sample depth.
 */
static model_t zeroplus_models[] = {
	{0x7009, "LAP-C(16064)",  16, 64,   100},
	{0x700A, "LAP-C(16128)",  16, 128,  200},
	{0x700B, "LAP-C(32128)",  32, 128,  200},
	{0x700C, "LAP-C(321000)", 32, 1024, 200},
	{0x700D, "LAP-C(322000)", 32, 2048, 200},
	{0x700E, "LAP-C(16032)",  16, 32,   100},
	{0x7016, "LAP-C(162000)", 16, 2048, 200},
};

static int capabilities[] = {
	SR_HWCAP_LOGIC_ANALYZER,
	SR_HWCAP_SAMPLERATE,
	SR_HWCAP_PROBECONFIG,
	SR_HWCAP_CAPTURE_RATIO,

	/* These are really implemented in the driver, not the hardware. */
	SR_HWCAP_LIMIT_SAMPLES,
	0,
};

/* List of struct sr_device_instance, maintained by opendev()/closedev(). */
static GSList *device_instances = NULL;

static libusb_context *usb_context = NULL;

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

/*
 * TODO: We shouldn't support 150MHz and 200MHz on devices that don't go up
 * that high.
 */
static uint64_t supported_samplerates[] = {
	100,
	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),
	0,
};

static struct sr_samplerates samplerates = {
	0, 0, 0,
	supported_samplerates,
};

/* TODO: All of these should go in a device-specific struct. */
static uint64_t cur_samplerate = 0;
static uint64_t limit_samples = 0;
static int num_channels = 32; /* TODO: This isn't initialized before it's needed :( */
static uint64_t memory_size = 0;
static uint8_t probe_mask = 0;
static uint8_t trigger_mask[NUM_TRIGGER_STAGES] = { 0 };
static uint8_t trigger_value[NUM_TRIGGER_STAGES] = { 0 };

// static uint8_t trigger_buffer[NUM_TRIGGER_STAGES] = { 0 };

static int hw_set_configuration(int device_index, int capability, void *value);

static unsigned int get_memory_size(int type)
{
	if (type == MEMORY_SIZE_8K)
		return 8 * 1024;
	else if (type == MEMORY_SIZE_64K)
		return 64 * 1024;
	else if (type == MEMORY_SIZE_128K)
		return 128 * 1024;
	else if (type == MEMORY_SIZE_512K)
		return 512 * 1024;
	else
		return 0;
}

static int opendev4(struct sr_device_instance **sdi, libusb_device *dev,
		    struct libusb_device_descriptor *des)
{
	unsigned int i;
	int err;

	if ((err = libusb_get_device_descriptor(dev, des))) {
		g_warning("failed to get device descriptor: %d", err);
		return -1;
	}

	if (des->idVendor != USB_VENDOR)
		return 0;

	if (libusb_get_bus_number(dev) == (*sdi)->usb->bus
	    && libusb_get_device_address(dev) == (*sdi)->usb->address) {

		for (i = 0; i < ARRAY_SIZE(zeroplus_models); i++) {
			if (!(des->idProduct == zeroplus_models[i].pid))
				continue;

			g_message("Found PID=%04X (%s)", des->idProduct,
				  zeroplus_models[i].model_name);
			num_channels = zeroplus_models[i].channels;
			memory_size = zeroplus_models[i].sample_depth * 1024;
			break;
		}

		if (num_channels == 0) {
			g_warning("Unknown ZeroPlus device %04X",
				  des->idProduct);
			return -2;
		}

		/* Found it. */
		if (!(err = libusb_open(dev, &((*sdi)->usb->devhdl)))) {
			(*sdi)->status = SR_ST_ACTIVE;
			g_message("opened device %d on %d.%d interface %d",
			     (*sdi)->index, (*sdi)->usb->bus,
			     (*sdi)->usb->address, USB_INTERFACE);
		} else {
			g_warning("failed to open device: %d", err);
			*sdi = NULL;
		}
	}

	return 0;
}

static struct sr_device_instance *zp_open_device(int device_index)
{
	struct sr_device_instance *sdi;
	libusb_device **devlist;
	struct libusb_device_descriptor des;
	int err, i;

	if (!(sdi = sr_get_device_instance(device_instances, device_index)))
		return NULL;

	libusb_get_device_list(usb_context, &devlist);
	if (sdi->status == SR_ST_INACTIVE) {
		/* Find the device by vendor, product, bus and address. */
		libusb_get_device_list(usb_context, &devlist);
		for (i = 0; devlist[i]; i++) {
			/* TODO: Error handling. */
			err = opendev4(&sdi, devlist[i], &des);
		}
	} else {
		/* Status must be SR_ST_ACTIVE, i.e. already in use... */
		sdi = NULL;
	}
	libusb_free_device_list(devlist, 1);

	if (sdi && sdi->status != SR_ST_ACTIVE)
		sdi = NULL;

	return sdi;
}

static void close_device(struct sr_device_instance *sdi)
{
	if (!sdi->usb->devhdl)
		return;

	g_message("closing device %d on %d.%d interface %d", sdi->index,
		  sdi->usb->bus, sdi->usb->address, USB_INTERFACE);
	libusb_release_interface(sdi->usb->devhdl, USB_INTERFACE);
	libusb_close(sdi->usb->devhdl);
	sdi->usb->devhdl = NULL;
	sdi->status = SR_ST_INACTIVE;
}

static int configure_probes(GSList *probes)
{
	struct sr_probe *probe;
	GSList *l;
	int probe_bit, stage, i;
	char *tc;

	probe_mask = 0;
	for (i = 0; i < NUM_TRIGGER_STAGES; i++) {
		trigger_mask[i] = 0;
		trigger_value[i] = 0;
	}

	stage = -1;
	for (l = probes; l; l = l->next) {
		probe = (struct sr_probe *)l->data;
		if (probe->enabled == FALSE)
			continue;
		probe_bit = 1 << (probe->index - 1);
		probe_mask |= probe_bit;

		if (probe->trigger) {
			stage = 0;
			for (tc = probe->trigger; *tc; tc++) {
				trigger_mask[stage] |= probe_bit;
				if (*tc == '1')
					trigger_value[stage] |= probe_bit;
				stage++;
				if (stage > NUM_TRIGGER_STAGES)
					return SR_ERR;
			}
		}
	}

	return SR_OK;
}

/*
 * API callbacks
 */

static int hw_init(const char *deviceinfo)
{
	struct sr_device_instance *sdi;
	struct libusb_device_descriptor des;
	libusb_device **devlist;
	int err, devcnt, i;

	/* Avoid compiler warnings. */
	deviceinfo = deviceinfo;

	if (libusb_init(&usb_context) != 0) {
		g_warning("Failed to initialize USB.");
		return 0;
	}

	/* Find all ZeroPlus analyzers and add them to device list. */
	devcnt = 0;
	libusb_get_device_list(usb_context, &devlist);

	for (i = 0; devlist[i]; i++) {
		err = libusb_get_device_descriptor(devlist[i], &des);
		if (err != 0) {
			g_warning("failed to get device descriptor: %d", err);
			continue;
		}

		if (des.idVendor == USB_VENDOR) {
			/*
			 * Definitely a Zeroplus.
			 * TODO: Any way to detect specific model/version in
			 * the zeroplus range?
			 */
			sdi = sr_device_instance_new(devcnt,
					SR_ST_INACTIVE, USB_VENDOR_NAME,
					USB_MODEL_NAME, USB_MODEL_VERSION);
			if (!sdi)
				return 0;
			device_instances =
			    g_slist_append(device_instances, sdi);
			sdi->usb = sr_usb_device_instance_new(
				libusb_get_bus_number(devlist[i]),
				libusb_get_device_address(devlist[i]), NULL);
			devcnt++;
		}
	}
	libusb_free_device_list(devlist, 1);

	return devcnt;
}

static int hw_opendev(int device_index)
{
	struct sr_device_instance *sdi;
	int err;

	if (!(sdi = zp_open_device(device_index))) {
		g_warning("unable to open device");
		return SR_ERR;
	}

	err = libusb_claim_interface(sdi->usb->devhdl, USB_INTERFACE);
	if (err != 0) {
		g_warning("Unable to claim interface: %d", err);
		return SR_ERR;
	}
	analyzer_reset(sdi->usb->devhdl);
	analyzer_initialize(sdi->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);
	analyzer_set_ramsize_trigger_address(
		(100 * get_memory_size(MEMORY_SIZE_512K) / 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 (cur_samplerate == 0) {
		/* Samplerate hasn't been set. Default to the slowest one. */
		if (hw_set_configuration(device_index, SR_HWCAP_SAMPLERATE,
		     &samplerates.low) == SR_ERR)
			return SR_ERR;
	}

	return SR_OK;
}

static void hw_closedev(int device_index)
{
	struct sr_device_instance *sdi;

	if ((sdi = sr_get_device_instance(device_instances, device_index)))
		close_device(sdi);
}

static void hw_cleanup(void)
{
	GSList *l;

	/* Properly close all devices... */
	for (l = device_instances; l; l = l->next)
		close_device((struct sr_device_instance *)l->data);

	/* ...and free all their memory. */
	for (l = device_instances; l; l = l->next)
		g_free(l->data);
	g_slist_free(device_instances);
	device_instances = NULL;

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

static void *hw_get_device_info(int device_index, int device_info_id)
{
	struct sr_device_instance *sdi;
	void *info = NULL;

	if (!(sdi = sr_get_device_instance(device_instances, device_index)))
		return NULL;

	switch (device_info_id) {
	case SR_DI_INSTANCE:
		info = sdi;
		break;
	case SR_DI_NUM_PROBES:
		info = GINT_TO_POINTER(num_channels);
		break;
	case SR_DI_SAMPLERATES:
		info = &samplerates;
		break;
	case SR_DI_TRIGGER_TYPES:
		info = TRIGGER_TYPES;
		break;
	case SR_DI_CUR_SAMPLERATE:
		info = &cur_samplerate;
		break;
	}

	return info;
}

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

	sdi = sr_get_device_instance(device_instances, device_index);
	if (sdi)
		return sdi->status;
	else
		return SR_ST_NOT_FOUND;
}

static int *hw_get_capabilities(void)
{
	return capabilities;
}

/* TODO: This will set the same samplerate for all devices. */
static int set_configuration_samplerate(uint64_t samplerate)
{
	g_message("%s(%" PRIu64 ")", __FUNCTION__, 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);

	cur_samplerate = samplerate;

	return SR_OK;
}

static int hw_set_configuration(int device_index, int capability, void *value)
{
	struct sr_device_instance *sdi;
	uint64_t *tmp_u64;

	if (!(sdi = sr_get_device_instance(device_instances, device_index)))
		return SR_ERR;

	switch (capability) {
	case SR_HWCAP_SAMPLERATE:
		tmp_u64 = value;
		return set_configuration_samplerate(*tmp_u64);
	case SR_HWCAP_PROBECONFIG:
		return configure_probes((GSList *) value);
	case SR_HWCAP_LIMIT_SAMPLES:
		tmp_u64 = value;
		limit_samples = *tmp_u64;
		return SR_OK;
	default:
		return SR_ERR;
	}
}

static int hw_start_acquisition(int device_index, gpointer session_device_id)
{
	struct sr_device_instance *sdi;
	struct sr_datafeed_packet packet;
	struct sr_datafeed_header header;
	int res;
	unsigned int packet_num;
	unsigned char *buf;

	if (!(sdi = sr_get_device_instance(device_instances, device_index)))
		return SR_ERR;

	/* push configured settings to device */
	analyzer_configure(sdi->usb->devhdl);

	analyzer_start(sdi->usb->devhdl);
	g_message("Waiting for data");
	analyzer_wait_data(sdi->usb->devhdl);

	g_message("Stop address    = 0x%x",
		  analyzer_get_stop_address(sdi->usb->devhdl));
	g_message("Now address     = 0x%x",
		  analyzer_get_now_address(sdi->usb->devhdl));
	g_message("Trigger address = 0x%x",
		  analyzer_get_trigger_address(sdi->usb->devhdl));

	packet.type = SR_DF_HEADER;
	packet.length = sizeof(struct sr_datafeed_header);
	packet.payload = (unsigned char *)&header;
	header.feed_version = 1;
	gettimeofday(&header.starttime, NULL);
	header.samplerate = cur_samplerate;
	header.protocol_id = SR_PROTO_RAW;
	header.num_logic_probes = num_channels;
	header.num_analog_probes = 0;
	sr_session_bus(session_device_id, &packet);

	buf = g_malloc(PACKET_SIZE);
	if (!buf)
		return SR_ERR;
	analyzer_read_start(sdi->usb->devhdl);
	/* Send the incoming transfer to the session bus. */
	for (packet_num = 0; packet_num < (memory_size * 4 / PACKET_SIZE);
	     packet_num++) {
		res = analyzer_read_data(sdi->usb->devhdl, buf, PACKET_SIZE);
#if 0
		g_message("Tried to read %llx bytes, actually read %x bytes",
			  PACKET_SIZE, res);
#endif

		packet.type = SR_DF_LOGIC;
		packet.length = PACKET_SIZE;
		packet.unitsize = 4;
		packet.payload = buf;
		sr_session_bus(session_device_id, &packet);
	}
	analyzer_read_stop(sdi->usb->devhdl);
	g_free(buf);

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

	return SR_OK;
}

/* This stops acquisition on ALL devices, ignoring device_index. */
static void hw_stop_acquisition(int device_index, gpointer session_device_id)
{
	struct sr_datafeed_packet packet;
	struct sr_device_instance *sdi;

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

	if (!(sdi = sr_get_device_instance(device_instances, device_index)))
		return; /* TODO: Cry? */

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

struct sr_device_plugin zeroplus_logic_cube_plugin_info = {
	"zeroplus-logic-cube",
	"Zeroplus Logic Cube LAP-C series",
	1,
	hw_init,
	hw_cleanup,
	hw_opendev,
	hw_closedev,
	hw_get_device_info,
	hw_get_status,
	hw_get_capabilities,
	hw_set_configuration,
	hw_start_acquisition,
	hw_stop_acquisition,
};
Commit	Line	Data
	1	/*
	2	* This file is part of the sigrok project.
	3	*
	4	* Copyright (C) 2010 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 <stdio.h>
	22	#include <stdlib.h>
	23	#include <sys/time.h>
	24	#include <inttypes.h>
	25	#include <glib.h>
	26	#include <libusb.h>
	27	#include <sigrok.h>
	28	#include <sigrok-internal.h>
	29	#include "analyzer.h"
	30
	31	#define USB_VENDOR 0x0c12
	32	#define USB_VENDOR_NAME "Zeroplus"
	33	#define USB_MODEL_NAME "Logic Cube"
	34	#define USB_MODEL_VERSION ""
	35
	36	#define USB_INTERFACE 0
	37	#define USB_CONFIGURATION 1
	38	#define NUM_TRIGGER_STAGES 4
	39	#define TRIGGER_TYPES "01"
	40
	41	#define PACKET_SIZE 2048 /* ?? */
	42
	43	typedef struct {
	44	unsigned short pid;
	45	char model_name[64];
	46	unsigned int channels;
	47	unsigned int sample_depth; /* In Ksamples/channel */
	48	unsigned int max_sampling_freq;
	49	} model_t;
	50
	51	/*
	52	* Note -- 16032, 16064 and 16128 usually -- but not always -- have the
	53	* same 128K sample depth.
	54	*/
	55	static model_t zeroplus_models[] = {
	56	{0x7009, "LAP-C(16064)", 16, 64, 100},
	57	{0x700A, "LAP-C(16128)", 16, 128, 200},
	58	{0x700B, "LAP-C(32128)", 32, 128, 200},
	59	{0x700C, "LAP-C(321000)", 32, 1024, 200},
	60	{0x700D, "LAP-C(322000)", 32, 2048, 200},
	61	{0x700E, "LAP-C(16032)", 16, 32, 100},
	62	{0x7016, "LAP-C(162000)", 16, 2048, 200},
	63	};
	64
	65	static int capabilities[] = {
	66	SR_HWCAP_LOGIC_ANALYZER,
	67	SR_HWCAP_SAMPLERATE,
	68	SR_HWCAP_PROBECONFIG,
	69	SR_HWCAP_CAPTURE_RATIO,
	70
	71	/* These are really implemented in the driver, not the hardware. */
	72	SR_HWCAP_LIMIT_SAMPLES,
	73	0,
	74	};
	75
	76	/* List of struct sr_device_instance, maintained by opendev()/closedev(). */
	77	static GSList *device_instances = NULL;
	78
	79	static libusb_context *usb_context = NULL;
	80
	81	/*
	82	* The hardware supports more samplerates than these, but these are the
	83	* options hardcoded into the vendor's Windows GUI.
	84	*/
	85
	86	/*
	87	* TODO: We shouldn't support 150MHz and 200MHz on devices that don't go up
	88	* that high.
	89	*/
	90	static uint64_t supported_samplerates[] = {
	91	100,
	92	500,
	93	SR_KHZ(1),
	94	SR_KHZ(5),
	95	SR_KHZ(25),
	96	SR_KHZ(50),
	97	SR_KHZ(100),
	98	SR_KHZ(200),
	99	SR_KHZ(400),
	100	SR_KHZ(800),
	101	SR_MHZ(1),
	102	SR_MHZ(10),
	103	SR_MHZ(25),
	104	SR_MHZ(50),
	105	SR_MHZ(80),
	106	SR_MHZ(100),
	107	SR_MHZ(150),
	108	SR_MHZ(200),
	109	0,
	110	};
	111
	112	static struct sr_samplerates samplerates = {
	113	0, 0, 0,
	114	supported_samplerates,
	115	};
	116
	117	/* TODO: All of these should go in a device-specific struct. */
	118	static uint64_t cur_samplerate = 0;
	119	static uint64_t limit_samples = 0;
	120	static int num_channels = 32; /* TODO: This isn't initialized before it's needed :( */
	121	static uint64_t memory_size = 0;
	122	static uint8_t probe_mask = 0;
	123	static uint8_t trigger_mask[NUM_TRIGGER_STAGES] = { 0 };
	124	static uint8_t trigger_value[NUM_TRIGGER_STAGES] = { 0 };
	125
	126	// static uint8_t trigger_buffer[NUM_TRIGGER_STAGES] = { 0 };
	127
	128	static int hw_set_configuration(int device_index, int capability, void *value);
	129
	130	static unsigned int get_memory_size(int type)
	131	{
	132	if (type == MEMORY_SIZE_8K)
	133	return 8 * 1024;
	134	else if (type == MEMORY_SIZE_64K)
	135	return 64 * 1024;
	136	else if (type == MEMORY_SIZE_128K)
	137	return 128 * 1024;
	138	else if (type == MEMORY_SIZE_512K)
	139	return 512 * 1024;
	140	else
	141	return 0;
	142	}
	143
	144	static int opendev4(struct sr_device_instance *sdi, libusb_device dev,
	145	struct libusb_device_descriptor *des)
	146	{
	147	unsigned int i;
	148	int err;
	149
	150	if ((err = libusb_get_device_descriptor(dev, des))) {
	151	g_warning("failed to get device descriptor: %d", err);
	152	return -1;
	153	}
	154
	155	if (des->idVendor != USB_VENDOR)
	156	return 0;
	157
	158	if (libusb_get_bus_number(dev) == (*sdi)->usb->bus
	159	&& libusb_get_device_address(dev) == (*sdi)->usb->address) {
	160
	161	for (i = 0; i < ARRAY_SIZE(zeroplus_models); i++) {
	162	if (!(des->idProduct == zeroplus_models[i].pid))
	163	continue;
	164
	165	g_message("Found PID=%04X (%s)", des->idProduct,
	166	zeroplus_models[i].model_name);
	167	num_channels = zeroplus_models[i].channels;
	168	memory_size = zeroplus_models[i].sample_depth * 1024;
	169	break;
	170	}
	171
	172	if (num_channels == 0) {
	173	g_warning("Unknown ZeroPlus device %04X",
	174	des->idProduct);
	175	return -2;
	176	}
	177
	178	/* Found it. */
	179	if (!(err = libusb_open(dev, &((*sdi)->usb->devhdl)))) {
	180	(*sdi)->status = SR_ST_ACTIVE;
	181	g_message("opened device %d on %d.%d interface %d",
	182	(sdi)->index, (sdi)->usb->bus,
	183	(*sdi)->usb->address, USB_INTERFACE);
	184	} else {
	185	g_warning("failed to open device: %d", err);
	186	*sdi = NULL;
	187	}
	188	}
	189
	190	return 0;
	191	}
	192
	193	static struct sr_device_instance *zp_open_device(int device_index)
	194	{
	195	struct sr_device_instance *sdi;
	196	libusb_device **devlist;
	197	struct libusb_device_descriptor des;
	198	int err, i;
	199
	200	if (!(sdi = sr_get_device_instance(device_instances, device_index)))
	201	return NULL;
	202
	203	libusb_get_device_list(usb_context, &devlist);
	204	if (sdi->status == SR_ST_INACTIVE) {
	205	/* Find the device by vendor, product, bus and address. */
	206	libusb_get_device_list(usb_context, &devlist);
	207	for (i = 0; devlist[i]; i++) {
	208	/* TODO: Error handling. */
	209	err = opendev4(&sdi, devlist[i], &des);
	210	}
	211	} else {
	212	/* Status must be SR_ST_ACTIVE, i.e. already in use... */
	213	sdi = NULL;
	214	}
	215	libusb_free_device_list(devlist, 1);
	216
	217	if (sdi && sdi->status != SR_ST_ACTIVE)
	218	sdi = NULL;
	219
	220	return sdi;
	221	}
	222
	223	static void close_device(struct sr_device_instance *sdi)
	224	{
	225	if (!sdi->usb->devhdl)
	226	return;
	227
	228	g_message("closing device %d on %d.%d interface %d", sdi->index,
	229	sdi->usb->bus, sdi->usb->address, USB_INTERFACE);
	230	libusb_release_interface(sdi->usb->devhdl, USB_INTERFACE);
	231	libusb_close(sdi->usb->devhdl);
	232	sdi->usb->devhdl = NULL;
	233	sdi->status = SR_ST_INACTIVE;
	234	}
	235
	236	static int configure_probes(GSList *probes)
	237	{
	238	struct sr_probe *probe;
	239	GSList *l;
	240	int probe_bit, stage, i;
	241	char *tc;
	242
	243	probe_mask = 0;
	244	for (i = 0; i < NUM_TRIGGER_STAGES; i++) {
	245	trigger_mask[i] = 0;
	246	trigger_value[i] = 0;
	247	}
	248
	249	stage = -1;
	250	for (l = probes; l; l = l->next) {
	251	probe = (struct sr_probe *)l->data;
	252	if (probe->enabled == FALSE)
	253	continue;
	254	probe_bit = 1 << (probe->index - 1);
	255	probe_mask \|= probe_bit;
	256
	257	if (probe->trigger) {
	258	stage = 0;
	259	for (tc = probe->trigger; *tc; tc++) {
	260	trigger_mask[stage] \|= probe_bit;
	261	if (*tc == '1')
	262	trigger_value[stage] \|= probe_bit;
	263	stage++;
	264	if (stage > NUM_TRIGGER_STAGES)
	265	return SR_ERR;
	266	}
	267	}
	268	}
	269
	270	return SR_OK;
	271	}
	272
	273	/*
	274	* API callbacks
	275	*/
	276
	277	static int hw_init(const char *deviceinfo)
	278	{
	279	struct sr_device_instance *sdi;
	280	struct libusb_device_descriptor des;
	281	libusb_device **devlist;
	282	int err, devcnt, i;
	283
	284	/* Avoid compiler warnings. */
	285	deviceinfo = deviceinfo;
	286
	287	if (libusb_init(&usb_context) != 0) {
	288	g_warning("Failed to initialize USB.");
	289	return 0;
	290	}
	291
	292	/* Find all ZeroPlus analyzers and add them to device list. */
	293	devcnt = 0;
	294	libusb_get_device_list(usb_context, &devlist);
	295
	296	for (i = 0; devlist[i]; i++) {
	297	err = libusb_get_device_descriptor(devlist[i], &des);
	298	if (err != 0) {
	299	g_warning("failed to get device descriptor: %d", err);
	300	continue;
	301	}
	302
	303	if (des.idVendor == USB_VENDOR) {
	304	/*
	305	* Definitely a Zeroplus.
	306	* TODO: Any way to detect specific model/version in
	307	* the zeroplus range?
	308	*/
	309	sdi = sr_device_instance_new(devcnt,
	310	SR_ST_INACTIVE, USB_VENDOR_NAME,
	311	USB_MODEL_NAME, USB_MODEL_VERSION);
	312	if (!sdi)
	313	return 0;
	314	device_instances =
	315	g_slist_append(device_instances, sdi);
	316	sdi->usb = sr_usb_device_instance_new(
	317	libusb_get_bus_number(devlist[i]),
	318	libusb_get_device_address(devlist[i]), NULL);
	319	devcnt++;
	320	}
	321	}
	322	libusb_free_device_list(devlist, 1);
	323
	324	return devcnt;
	325	}
	326
	327	static int hw_opendev(int device_index)
	328	{
	329	struct sr_device_instance *sdi;
	330	int err;
	331
	332	if (!(sdi = zp_open_device(device_index))) {
	333	g_warning("unable to open device");
	334	return SR_ERR;
	335	}
	336
	337	err = libusb_claim_interface(sdi->usb->devhdl, USB_INTERFACE);
	338	if (err != 0) {
	339	g_warning("Unable to claim interface: %d", err);
	340	return SR_ERR;
	341	}
	342	analyzer_reset(sdi->usb->devhdl);
	343	analyzer_initialize(sdi->usb->devhdl);
	344
	345	analyzer_set_memory_size(MEMORY_SIZE_512K);
	346	// analyzer_set_freq(g_freq, g_freq_scale);
	347	analyzer_set_trigger_count(1);
	348	// analyzer_set_ramsize_trigger_address((((100 - g_pre_trigger)
	349	// * get_memory_size(g_memory_size)) / 100) >> 2);
	350	analyzer_set_ramsize_trigger_address(
	351	(100 * get_memory_size(MEMORY_SIZE_512K) / 100) >> 2);
	352
	353	#if 0
	354	if (g_double_mode == 1)
	355	analyzer_set_compression(COMPRESSION_DOUBLE);
	356	else if (g_compression == 1)
	357	analyzer_set_compression(COMPRESSION_ENABLE);
	358	else
	359	#endif
	360	analyzer_set_compression(COMPRESSION_NONE);
	361
	362	if (cur_samplerate == 0) {
	363	/* Samplerate hasn't been set. Default to the slowest one. */
	364	if (hw_set_configuration(device_index, SR_HWCAP_SAMPLERATE,
	365	&samplerates.low) == SR_ERR)
	366	return SR_ERR;
	367	}
	368
	369	return SR_OK;
	370	}
	371
	372	static void hw_closedev(int device_index)
	373	{
	374	struct sr_device_instance *sdi;
	375
	376	if ((sdi = sr_get_device_instance(device_instances, device_index)))
	377	close_device(sdi);
	378	}
	379
	380	static void hw_cleanup(void)
	381	{
	382	GSList *l;
	383
	384	/* Properly close all devices... */
	385	for (l = device_instances; l; l = l->next)
	386	close_device((struct sr_device_instance *)l->data);
	387
	388	/* ...and free all their memory. */
	389	for (l = device_instances; l; l = l->next)
	390	g_free(l->data);
	391	g_slist_free(device_instances);
	392	device_instances = NULL;
	393
	394	if (usb_context)
	395	libusb_exit(usb_context);
	396	usb_context = NULL;
	397	}
	398
	399	static void *hw_get_device_info(int device_index, int device_info_id)
	400	{
	401	struct sr_device_instance *sdi;
	402	void *info = NULL;
	403
	404	if (!(sdi = sr_get_device_instance(device_instances, device_index)))
	405	return NULL;
	406
	407	switch (device_info_id) {
	408	case SR_DI_INSTANCE:
	409	info = sdi;
	410	break;
	411	case SR_DI_NUM_PROBES:
	412	info = GINT_TO_POINTER(num_channels);
	413	break;
	414	case SR_DI_SAMPLERATES:
	415	info = &samplerates;
	416	break;
	417	case SR_DI_TRIGGER_TYPES:
	418	info = TRIGGER_TYPES;
	419	break;
	420	case SR_DI_CUR_SAMPLERATE:
	421	info = &cur_samplerate;
	422	break;
	423	}
	424
	425	return info;
	426	}
	427
	428	static int hw_get_status(int device_index)
	429	{
	430	struct sr_device_instance *sdi;
	431
	432	sdi = sr_get_device_instance(device_instances, device_index);
	433	if (sdi)
	434	return sdi->status;
	435	else
	436	return SR_ST_NOT_FOUND;
	437	}
	438
	439	static int *hw_get_capabilities(void)
	440	{
	441	return capabilities;
	442	}
	443
	444	/* TODO: This will set the same samplerate for all devices. */
	445	static int set_configuration_samplerate(uint64_t samplerate)
	446	{
	447	g_message("%s(%" PRIu64 ")", __FUNCTION__, samplerate);
	448	if (samplerate > SR_MHZ(1))
	449	analyzer_set_freq(samplerate / SR_MHZ(1), FREQ_SCALE_MHZ);
	450	else if (samplerate > SR_KHZ(1))
	451	analyzer_set_freq(samplerate / SR_KHZ(1), FREQ_SCALE_KHZ);
	452	else
	453	analyzer_set_freq(samplerate, FREQ_SCALE_HZ);
	454
	455	cur_samplerate = samplerate;
	456
	457	return SR_OK;
	458	}
	459
	460	static int hw_set_configuration(int device_index, int capability, void *value)
	461	{
	462	struct sr_device_instance *sdi;
	463	uint64_t *tmp_u64;
	464
	465	if (!(sdi = sr_get_device_instance(device_instances, device_index)))
	466	return SR_ERR;
	467
	468	switch (capability) {
	469	case SR_HWCAP_SAMPLERATE:
	470	tmp_u64 = value;
	471	return set_configuration_samplerate(*tmp_u64);
	472	case SR_HWCAP_PROBECONFIG:
	473	return configure_probes((GSList *) value);
	474	case SR_HWCAP_LIMIT_SAMPLES:
	475	tmp_u64 = value;
	476	limit_samples = *tmp_u64;
	477	return SR_OK;
	478	default:
	479	return SR_ERR;
	480	}
	481	}
	482
	483	static int hw_start_acquisition(int device_index, gpointer session_device_id)
	484	{
	485	struct sr_device_instance *sdi;
	486	struct sr_datafeed_packet packet;
	487	struct sr_datafeed_header header;
	488	int res;
	489	unsigned int packet_num;
	490	unsigned char *buf;
	491
	492	if (!(sdi = sr_get_device_instance(device_instances, device_index)))
	493	return SR_ERR;
	494
	495	/* push configured settings to device */
	496	analyzer_configure(sdi->usb->devhdl);
	497
	498	analyzer_start(sdi->usb->devhdl);
	499	g_message("Waiting for data");
	500	analyzer_wait_data(sdi->usb->devhdl);
	501
	502	g_message("Stop address = 0x%x",
	503	analyzer_get_stop_address(sdi->usb->devhdl));
	504	g_message("Now address = 0x%x",
	505	analyzer_get_now_address(sdi->usb->devhdl));
	506	g_message("Trigger address = 0x%x",
	507	analyzer_get_trigger_address(sdi->usb->devhdl));
	508
	509	packet.type = SR_DF_HEADER;
	510	packet.length = sizeof(struct sr_datafeed_header);
	511	packet.payload = (unsigned char *)&header;
	512	header.feed_version = 1;
	513	gettimeofday(&header.starttime, NULL);
	514	header.samplerate = cur_samplerate;
	515	header.protocol_id = SR_PROTO_RAW;
	516	header.num_logic_probes = num_channels;
	517	header.num_analog_probes = 0;
	518	sr_session_bus(session_device_id, &packet);
	519
	520	buf = g_malloc(PACKET_SIZE);
	521	if (!buf)
	522	return SR_ERR;
	523	analyzer_read_start(sdi->usb->devhdl);
	524	/* Send the incoming transfer to the session bus. */
	525	for (packet_num = 0; packet_num < (memory_size * 4 / PACKET_SIZE);
	526	packet_num++) {
	527	res = analyzer_read_data(sdi->usb->devhdl, buf, PACKET_SIZE);
	528	#if 0
	529	g_message("Tried to read %llx bytes, actually read %x bytes",
	530	PACKET_SIZE, res);
	531	#endif
	532
	533	packet.type = SR_DF_LOGIC;
	534	packet.length = PACKET_SIZE;
	535	packet.unitsize = 4;
	536	packet.payload = buf;
	537	sr_session_bus(session_device_id, &packet);
	538	}
	539	analyzer_read_stop(sdi->usb->devhdl);
	540	g_free(buf);
	541
	542	packet.type = SR_DF_END;
	543	sr_session_bus(session_device_id, &packet);
	544
	545	return SR_OK;
	546	}
	547
	548	/* This stops acquisition on ALL devices, ignoring device_index. */
	549	static void hw_stop_acquisition(int device_index, gpointer session_device_id)
	550	{
	551	struct sr_datafeed_packet packet;
	552	struct sr_device_instance *sdi;
	553
	554	packet.type = SR_DF_END;
	555	sr_session_bus(session_device_id, &packet);
	556
	557	if (!(sdi = sr_get_device_instance(device_instances, device_index)))
	558	return; /* TODO: Cry? */
	559
	560	analyzer_reset(sdi->usb->devhdl);
	561	/* TODO: Need to cancel and free any queued up transfers. */
	562	}
	563
	564	struct sr_device_plugin zeroplus_logic_cube_plugin_info = {
	565	"zeroplus-logic-cube",
	566	"Zeroplus Logic Cube LAP-C series",
	567	1,
	568	hw_init,
	569	hw_cleanup,
	570	hw_opendev,
	571	hw_closedev,
	572	hw_get_device_info,
	573	hw_get_status,
	574	hw_get_capabilities,
	575	hw_set_configuration,
	576	hw_start_acquisition,
	577	hw_stop_acquisition,
	578	};