[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 "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.
 */
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,
	KHZ(1),
	KHZ(5),
	KHZ(25),
	KHZ(50),
	KHZ(100),
	KHZ(200),
	KHZ(400),
	KHZ(800),
	MHZ(1),
	MHZ(10),
	MHZ(25),
	MHZ(50),
	MHZ(80),
	MHZ(100),
	MHZ(150),
	MHZ(200),
	0,
};

static struct 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;
int num_channels = 32; /* TODO: This isn't initialized before it's needed :( */
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;
}

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 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 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(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 > MHZ(1))
		analyzer_set_freq(samplerate / MHZ(1), FREQ_SCALE_MHZ);
	else if (samplerate > KHZ(1))
		analyzer_set_freq(samplerate / 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;
	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;
		session_bus(session_device_id, &packet);
	}
	analyzer_read_stop(sdi->usb->devhdl);
	g_free(buf);

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