[libsigrok.git] / hardware / chronovu-la8 / api.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2011-2014 Uwe Hermann <uwe@hermann-uwe.de>
 *
 * 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 2 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, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 */

#include "protocol.h"

SR_PRIV struct sr_dev_driver chronovu_la8_driver_info;
static struct sr_dev_driver *di = &chronovu_la8_driver_info;

/*
 * This will be initialized via config_list()/SR_CONF_SAMPLERATE.
 *
 * Min: 1 sample per 0.01us -> sample time is 0.084s, samplerate 100MHz
 * Max: 1 sample per 2.55us -> sample time is 21.391s, samplerate 392.15kHz
 */
SR_PRIV uint64_t cv_samplerates[255] = { 0 };

SR_PRIV const int32_t cv_hwcaps[] = {
	SR_CONF_LOGIC_ANALYZER,
	SR_CONF_SAMPLERATE,
	SR_CONF_LIMIT_MSEC, /* TODO: Not yet implemented. */
	SR_CONF_LIMIT_SAMPLES, /* TODO: Not yet implemented. */
};

/*
 * The ChronoVu LA8 can have multiple PIDs. Older versions shipped with
 * a standard FTDI USB VID/PID of 0403:6001, newer ones have 0403:8867.
 */ 
static const uint16_t usb_pids[] = {
	0x6001,
	0x8867,
};

static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data);

static void clear_helper(void *priv)
{
	struct dev_context *devc;

	devc = priv;

	ftdi_free(devc->ftdic);
	g_free(devc->final_buf);
}

static int dev_clear(void)
{
	return std_dev_clear(di, clear_helper);
}

static int init(struct sr_context *sr_ctx)
{
	return std_init(sr_ctx, di, LOG_PREFIX);
}

static GSList *scan(GSList *options)
{
	struct sr_dev_inst *sdi;
	struct sr_channel *ch;
	struct drv_context *drvc;
	struct dev_context *devc;
	GSList *devices;
	unsigned int i;
	int ret;

	(void)options;

	drvc = di->priv;

	devices = NULL;

	/* Allocate memory for our private device context. */
	devc = g_try_malloc(sizeof(struct dev_context));

	/* Set some sane defaults. */
	devc->ftdic = NULL;
	devc->cur_samplerate = SR_MHZ(100); /* 100MHz == max. samplerate */
	devc->limit_msec = 0;
	devc->limit_samples = 0;
	devc->cb_data = NULL;
	memset(devc->mangled_buf, 0, BS);
	devc->final_buf = NULL;
	devc->trigger_pattern = 0x00; /* Value irrelevant, see trigger_mask. */
	devc->trigger_mask = 0x00; /* All channels are "don't care". */
	devc->trigger_timeout = 10; /* Default to 10s trigger timeout. */
	devc->trigger_found = 0;
	devc->done = 0;
	devc->block_counter = 0;
	devc->divcount = 0; /* 10ns sample period == 100MHz samplerate */
	devc->usb_pid = 0;

	/* Allocate memory where we'll store the de-mangled data. */
	if (!(devc->final_buf = g_try_malloc(SDRAM_SIZE))) {
		sr_err("Failed to allocate memory for sample buffer.");
		goto err_free_devc;
	}

	/* Allocate memory for the FTDI context (ftdic) and initialize it. */
	if (!(devc->ftdic = ftdi_new())) {
		sr_err("Failed to initialize libftdi.");
		goto err_free_final_buf;
	}

	/* Check for the device and temporarily open it. */
	for (i = 0; i < ARRAY_SIZE(usb_pids); i++) {
		sr_dbg("Probing for VID/PID %04x:%04x.", USB_VENDOR_ID,
		       usb_pids[i]);
		ret = ftdi_usb_open_desc(devc->ftdic, USB_VENDOR_ID,
					 usb_pids[i], USB_DESCRIPTION, NULL);
		if (ret == 0) {
			sr_dbg("Found LA8 device (%04x:%04x).",
			       USB_VENDOR_ID, usb_pids[i]);
			devc->usb_pid = usb_pids[i];
		}
	}

	if (devc->usb_pid == 0)
		goto err_free_ftdic;

	/* Register the device with libsigrok. */
	sdi = sr_dev_inst_new(0, SR_ST_INITIALIZING,
			USB_VENDOR_NAME, USB_MODEL_NAME, USB_MODEL_VERSION);
	if (!sdi) {
		sr_err("Failed to create device instance.");
		goto err_close_ftdic;
	}
	sdi->driver = di;
	sdi->priv = devc;

	for (i = 0; cv_channel_names[i]; i++) {
		if (!(ch = sr_channel_new(i, SR_CHANNEL_LOGIC, TRUE,
					  cv_channel_names[i])))
			return NULL;
		sdi->channels = g_slist_append(sdi->channels, ch);
	}

	devices = g_slist_append(devices, sdi);
	drvc->instances = g_slist_append(drvc->instances, sdi);

	/* Close device. We'll reopen it again when we need it. */
	(void) cv_close(devc); /* Log, but ignore errors. */

	return devices;

err_close_ftdic:
	(void) cv_close(devc); /* Log, but ignore errors. */
err_free_ftdic:
	ftdi_free(devc->ftdic); /* NOT free() or g_free()! */
err_free_final_buf:
	g_free(devc->final_buf);
err_free_devc:
	g_free(devc);
err_free_nothing:

	return NULL;
}

static GSList *dev_list(void)
{
	return ((struct drv_context *)(di->priv))->instances;
}

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

	if (!(devc = sdi->priv))
		return SR_ERR_BUG;

	sr_dbg("Opening LA8 device (%04x:%04x).", USB_VENDOR_ID,
	       devc->usb_pid);

	/* Open the device. */
	if ((ret = ftdi_usb_open_desc(devc->ftdic, USB_VENDOR_ID,
			devc->usb_pid, USB_DESCRIPTION, NULL)) < 0) {
		sr_err("Failed to open FTDI device (%d): %s.",
		       ret, ftdi_get_error_string(devc->ftdic));
		(void) cv_close_usb_reset_sequencer(devc); /* Ignore errors. */
		return SR_ERR;
	}
	sr_dbg("Device opened successfully.");

	/* Purge RX/TX buffers in the FTDI chip. */
	if ((ret = ftdi_usb_purge_buffers(devc->ftdic)) < 0) {
		sr_err("Failed to purge FTDI buffers (%d): %s.",
		       ret, ftdi_get_error_string(devc->ftdic));
		(void) cv_close_usb_reset_sequencer(devc); /* Ignore errors. */
		goto err_dev_open_close_ftdic;
	}
	sr_dbg("FTDI buffers purged successfully.");

	/* Enable flow control in the FTDI chip. */
	if ((ret = ftdi_setflowctrl(devc->ftdic, SIO_RTS_CTS_HS)) < 0) {
		sr_err("Failed to enable FTDI flow control (%d): %s.",
		       ret, ftdi_get_error_string(devc->ftdic));
		(void) cv_close_usb_reset_sequencer(devc); /* Ignore errors. */
		goto err_dev_open_close_ftdic;
	}
	sr_dbg("FTDI flow control enabled successfully.");

	/* Wait 100ms. */
	g_usleep(100 * 1000);

	sdi->status = SR_ST_ACTIVE;

	return SR_OK;

err_dev_open_close_ftdic:
	(void) cv_close(devc); /* Log, but ignore errors. */
	return SR_ERR;
}

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

	devc = sdi->priv;

	if (sdi->status == SR_ST_ACTIVE) {
		sr_dbg("Status ACTIVE, closing device.");
		(void) cv_close_usb_reset_sequencer(devc); /* Ignore errors. */
	} else {
		sr_spew("Status not ACTIVE, nothing to do.");
	}

	sdi->status = SR_ST_INACTIVE;

	return SR_OK;
}

static int cleanup(void)
{
	return dev_clear();
}

static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi,
		const struct sr_channel_group *cg)
{
	struct dev_context *devc;

	(void)cg;

	switch (id) {
	case SR_CONF_SAMPLERATE:
		if (!sdi || !(devc = sdi->priv))
			return SR_ERR_BUG;
		*data = g_variant_new_uint64(devc->cur_samplerate);
		break;
	default:
		return SR_ERR_NA;
	}

	return SR_OK;
}

static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi,
		const struct sr_channel_group *cg)
{
	struct dev_context *devc;

	(void)cg;

	if (sdi->status != SR_ST_ACTIVE)
		return SR_ERR_DEV_CLOSED;

	if (!(devc = sdi->priv))
		return SR_ERR_BUG;

	switch (id) {
	case SR_CONF_SAMPLERATE:
		if (set_samplerate(sdi, g_variant_get_uint64(data)) < 0)
			return SR_ERR;
		break;
	case SR_CONF_LIMIT_MSEC:
		if (g_variant_get_uint64(data) == 0)
			return SR_ERR_ARG;
		devc->limit_msec = g_variant_get_uint64(data);
		break;
	case SR_CONF_LIMIT_SAMPLES:
		if (g_variant_get_uint64(data) == 0)
			return SR_ERR_ARG;
		devc->limit_samples = g_variant_get_uint64(data);
		break;
	default:
		return SR_ERR_NA;
	}

	return SR_OK;
}

static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
		const struct sr_channel_group *cg)
{
	GVariant *gvar, *grange[2];
	GVariantBuilder gvb;

	(void)sdi;
	(void)cg;

	switch (key) {
	case SR_CONF_DEVICE_OPTIONS:
		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
				cv_hwcaps, ARRAY_SIZE(cv_hwcaps),
				sizeof(int32_t));
		break;
	case SR_CONF_SAMPLERATE:
		cv_fill_samplerates_if_needed();
		g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
		gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
				cv_samplerates, ARRAY_SIZE(cv_samplerates),
				sizeof(uint64_t));
		g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
		*data = g_variant_builder_end(&gvb);
		break;
	case SR_CONF_LIMIT_SAMPLES:
		grange[0] = g_variant_new_uint64(0);
		grange[1] = g_variant_new_uint64(MAX_NUM_SAMPLES);
		*data = g_variant_new_tuple(grange, 2);
		break;
	case SR_CONF_TRIGGER_TYPE:
		*data = g_variant_new_string(TRIGGER_TYPE);
		break;
	default:
		return SR_ERR_NA;
	}

	return SR_OK;
}

static int receive_data(int fd, int revents, void *cb_data)
{
	int i, ret;
	struct sr_dev_inst *sdi;
	struct dev_context *devc;

	(void)fd;
	(void)revents;

	if (!(sdi = cb_data)) {
		sr_err("cb_data was NULL.");
		return FALSE;
	}

	if (!(devc = sdi->priv)) {
		sr_err("sdi->priv was NULL.");
		return FALSE;
	}

	if (!devc->ftdic) {
		sr_err("devc->ftdic was NULL.");
		return FALSE;
	}

	/* Get one block of data. */
	if ((ret = cv_read_block(devc)) < 0) {
		sr_err("Failed to read data block: %d.", ret);
		dev_acquisition_stop(sdi, sdi);
		return FALSE;
	}

	/* We need to get exactly NUM_BLOCKS blocks (i.e. 8MB) of data. */
	if (devc->block_counter != (NUM_BLOCKS - 1)) {
		devc->block_counter++;
		return TRUE;
	}

	sr_dbg("Sampling finished, sending data to session bus now.");

	/* All data was received and demangled, send it to the session bus. */
	for (i = 0; i < NUM_BLOCKS; i++)
		cv_send_block_to_session_bus(devc, i);

	dev_acquisition_stop(sdi, sdi);

	return TRUE;
}

static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
{
	struct dev_context *devc;
	uint8_t buf[4];
	int bytes_written;

	if (sdi->status != SR_ST_ACTIVE)
		return SR_ERR_DEV_CLOSED;

	if (!(devc = sdi->priv)) {
		sr_err("sdi->priv was NULL.");
		return SR_ERR_BUG;
	}

	if (!devc->ftdic) {
		sr_err("devc->ftdic was NULL.");
		return SR_ERR_BUG;
	}

	devc->divcount = cv_samplerate_to_divcount(devc->cur_samplerate);
	if (devc->divcount == 0xff) {
		sr_err("Invalid divcount/samplerate.");
		return SR_ERR;
	}

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

	/* Fill acquisition parameters into buf[]. */
	buf[0] = devc->divcount;
	buf[1] = 0xff; /* This byte must always be 0xff. */
	buf[2] = devc->trigger_pattern;
	buf[3] = devc->trigger_mask;

	/* Start acquisition. */
	bytes_written = cv_write(devc, buf, 4);

	if (bytes_written < 0) {
		sr_err("Acquisition failed to start: %d.", bytes_written);
		return SR_ERR;
	} else if (bytes_written != 4) {
		sr_err("Acquisition failed to start: %d.", bytes_written);
		return SR_ERR;
	}

	sr_dbg("Hardware acquisition started successfully.");

	devc->cb_data = cb_data;

	/* Send header packet to the session bus. */
	std_session_send_df_header(cb_data, LOG_PREFIX);

	/* Time when we should be done (for detecting trigger timeouts). */
	devc->done = (devc->divcount + 1) * 0.08388608 + time(NULL)
			+ devc->trigger_timeout;
	devc->block_counter = 0;
	devc->trigger_found = 0;

	/* Hook up a dummy handler to receive data from the device. */
	sr_source_add(-1, G_IO_IN, 0, receive_data, (void *)sdi);

	return SR_OK;
}

static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
{
	struct sr_datafeed_packet packet;

	(void)sdi;

	sr_dbg("Stopping acquisition.");
	sr_source_remove(-1);

	/* Send end packet to the session bus. */
	sr_dbg("Sending SR_DF_END.");
	packet.type = SR_DF_END;
	sr_session_send(cb_data, &packet);

	return SR_OK;
}

SR_PRIV struct sr_dev_driver chronovu_la8_driver_info = {
	.name = "chronovu-la8",
	.longname = "ChronoVu LA8",
	.api_version = 1,
	.init = init,
	.cleanup = cleanup,
	.scan = scan,
	.dev_list = dev_list,
	.dev_clear = dev_clear,
	.config_get = config_get,
	.config_set = config_set,
	.config_list = config_list,
	.dev_open = dev_open,
	.dev_close = dev_close,
	.dev_acquisition_start = dev_acquisition_start,
	.dev_acquisition_stop = dev_acquisition_stop,
	.priv = NULL,
};
Commit	Line	Data
	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2011-2014 Uwe Hermann <uwe@hermann-uwe.de>
	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 2 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, write to the Free Software
	18	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	19	*/
	20
	21	#include "protocol.h"
	22
	23	SR_PRIV struct sr_dev_driver chronovu_la8_driver_info;
	24	static struct sr_dev_driver *di = &chronovu_la8_driver_info;
	25
	26	/*
	27	* This will be initialized via config_list()/SR_CONF_SAMPLERATE.
	28	*
	29	* Min: 1 sample per 0.01us -> sample time is 0.084s, samplerate 100MHz
	30	* Max: 1 sample per 2.55us -> sample time is 21.391s, samplerate 392.15kHz
	31	*/
	32	SR_PRIV uint64_t cv_samplerates[255] = { 0 };
	33
	34	SR_PRIV const int32_t cv_hwcaps[] = {
	35	SR_CONF_LOGIC_ANALYZER,
	36	SR_CONF_SAMPLERATE,
	37	SR_CONF_LIMIT_MSEC, /* TODO: Not yet implemented. */
	38	SR_CONF_LIMIT_SAMPLES, /* TODO: Not yet implemented. */
	39	};
	40
	41	/*
	42	* The ChronoVu LA8 can have multiple PIDs. Older versions shipped with
	43	* a standard FTDI USB VID/PID of 0403:6001, newer ones have 0403:8867.
	44	*/
	45	static const uint16_t usb_pids[] = {
	46	0x6001,
	47	0x8867,
	48	};
	49
	50	static int dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data);
	51
	52	static void clear_helper(void *priv)
	53	{
	54	struct dev_context *devc;
	55
	56	devc = priv;
	57
	58	ftdi_free(devc->ftdic);
	59	g_free(devc->final_buf);
	60	}
	61
	62	static int dev_clear(void)
	63	{
	64	return std_dev_clear(di, clear_helper);
	65	}
	66
	67	static int init(struct sr_context *sr_ctx)
	68	{
	69	return std_init(sr_ctx, di, LOG_PREFIX);
	70	}
	71
	72	static GSList scan(GSList options)
	73	{
	74	struct sr_dev_inst *sdi;
	75	struct sr_channel *ch;
	76	struct drv_context *drvc;
	77	struct dev_context *devc;
	78	GSList *devices;
	79	unsigned int i;
	80	int ret;
	81
	82	(void)options;
	83
	84	drvc = di->priv;
	85
	86	devices = NULL;
	87
	88	/* Allocate memory for our private device context. */
	89	devc = g_try_malloc(sizeof(struct dev_context));
	90
	91	/* Set some sane defaults. */
	92	devc->ftdic = NULL;
	93	devc->cur_samplerate = SR_MHZ(100); /* 100MHz == max. samplerate */
	94	devc->limit_msec = 0;
	95	devc->limit_samples = 0;
	96	devc->cb_data = NULL;
	97	memset(devc->mangled_buf, 0, BS);
	98	devc->final_buf = NULL;
	99	devc->trigger_pattern = 0x00; /* Value irrelevant, see trigger_mask. */
	100	devc->trigger_mask = 0x00; /* All channels are "don't care". */
	101	devc->trigger_timeout = 10; /* Default to 10s trigger timeout. */
	102	devc->trigger_found = 0;
	103	devc->done = 0;
	104	devc->block_counter = 0;
	105	devc->divcount = 0; /* 10ns sample period == 100MHz samplerate */
	106	devc->usb_pid = 0;
	107
	108	/* Allocate memory where we'll store the de-mangled data. */
	109	if (!(devc->final_buf = g_try_malloc(SDRAM_SIZE))) {
	110	sr_err("Failed to allocate memory for sample buffer.");
	111	goto err_free_devc;
	112	}
	113
	114	/* Allocate memory for the FTDI context (ftdic) and initialize it. */
	115	if (!(devc->ftdic = ftdi_new())) {
	116	sr_err("Failed to initialize libftdi.");
	117	goto err_free_final_buf;
	118	}
	119
	120	/* Check for the device and temporarily open it. */
	121	for (i = 0; i < ARRAY_SIZE(usb_pids); i++) {
	122	sr_dbg("Probing for VID/PID %04x:%04x.", USB_VENDOR_ID,
	123	usb_pids[i]);
	124	ret = ftdi_usb_open_desc(devc->ftdic, USB_VENDOR_ID,
	125	usb_pids[i], USB_DESCRIPTION, NULL);
	126	if (ret == 0) {
	127	sr_dbg("Found LA8 device (%04x:%04x).",
	128	USB_VENDOR_ID, usb_pids[i]);
	129	devc->usb_pid = usb_pids[i];
	130	}
	131	}
	132
	133	if (devc->usb_pid == 0)
	134	goto err_free_ftdic;
	135
	136	/* Register the device with libsigrok. */
	137	sdi = sr_dev_inst_new(0, SR_ST_INITIALIZING,
	138	USB_VENDOR_NAME, USB_MODEL_NAME, USB_MODEL_VERSION);
	139	if (!sdi) {
	140	sr_err("Failed to create device instance.");
	141	goto err_close_ftdic;
	142	}
	143	sdi->driver = di;
	144	sdi->priv = devc;
	145
	146	for (i = 0; cv_channel_names[i]; i++) {
	147	if (!(ch = sr_channel_new(i, SR_CHANNEL_LOGIC, TRUE,
	148	cv_channel_names[i])))
	149	return NULL;
	150	sdi->channels = g_slist_append(sdi->channels, ch);
	151	}
	152
	153	devices = g_slist_append(devices, sdi);
	154	drvc->instances = g_slist_append(drvc->instances, sdi);
	155
	156	/* Close device. We'll reopen it again when we need it. */
	157	(void) cv_close(devc); /* Log, but ignore errors. */
	158
	159	return devices;
	160
	161	err_close_ftdic:
	162	(void) cv_close(devc); /* Log, but ignore errors. */
	163	err_free_ftdic:
	164	ftdi_free(devc->ftdic); /* NOT free() or g_free()! */
	165	err_free_final_buf:
	166	g_free(devc->final_buf);
	167	err_free_devc:
	168	g_free(devc);
	169	err_free_nothing:
	170
	171	return NULL;
	172	}
	173
	174	static GSList *dev_list(void)
	175	{
	176	return ((struct drv_context *)(di->priv))->instances;
	177	}
	178
	179	static int dev_open(struct sr_dev_inst *sdi)
	180	{
	181	struct dev_context *devc;
	182	int ret;
	183
	184	if (!(devc = sdi->priv))
	185	return SR_ERR_BUG;
	186
	187	sr_dbg("Opening LA8 device (%04x:%04x).", USB_VENDOR_ID,
	188	devc->usb_pid);
	189
	190	/* Open the device. */
	191	if ((ret = ftdi_usb_open_desc(devc->ftdic, USB_VENDOR_ID,
	192	devc->usb_pid, USB_DESCRIPTION, NULL)) < 0) {
	193	sr_err("Failed to open FTDI device (%d): %s.",
	194	ret, ftdi_get_error_string(devc->ftdic));
	195	(void) cv_close_usb_reset_sequencer(devc); /* Ignore errors. */
	196	return SR_ERR;
	197	}
	198	sr_dbg("Device opened successfully.");
	199
	200	/* Purge RX/TX buffers in the FTDI chip. */
	201	if ((ret = ftdi_usb_purge_buffers(devc->ftdic)) < 0) {
	202	sr_err("Failed to purge FTDI buffers (%d): %s.",
	203	ret, ftdi_get_error_string(devc->ftdic));
	204	(void) cv_close_usb_reset_sequencer(devc); /* Ignore errors. */
	205	goto err_dev_open_close_ftdic;
	206	}
	207	sr_dbg("FTDI buffers purged successfully.");
	208
	209	/* Enable flow control in the FTDI chip. */
	210	if ((ret = ftdi_setflowctrl(devc->ftdic, SIO_RTS_CTS_HS)) < 0) {
	211	sr_err("Failed to enable FTDI flow control (%d): %s.",
	212	ret, ftdi_get_error_string(devc->ftdic));
	213	(void) cv_close_usb_reset_sequencer(devc); /* Ignore errors. */
	214	goto err_dev_open_close_ftdic;
	215	}
	216	sr_dbg("FTDI flow control enabled successfully.");
	217
	218	/* Wait 100ms. */
	219	g_usleep(100 * 1000);
	220
	221	sdi->status = SR_ST_ACTIVE;
	222
	223	return SR_OK;
	224
	225	err_dev_open_close_ftdic:
	226	(void) cv_close(devc); /* Log, but ignore errors. */
	227	return SR_ERR;
	228	}
	229
	230	static int dev_close(struct sr_dev_inst *sdi)
	231	{
	232	struct dev_context *devc;
	233
	234	devc = sdi->priv;
	235
	236	if (sdi->status == SR_ST_ACTIVE) {
	237	sr_dbg("Status ACTIVE, closing device.");
	238	(void) cv_close_usb_reset_sequencer(devc); /* Ignore errors. */
	239	} else {
	240	sr_spew("Status not ACTIVE, nothing to do.");
	241	}
	242
	243	sdi->status = SR_ST_INACTIVE;
	244
	245	return SR_OK;
	246	}
	247
	248	static int cleanup(void)
	249	{
	250	return dev_clear();
	251	}
	252
	253	static int config_get(int id, GVariant *data, const struct sr_dev_inst sdi,
	254	const struct sr_channel_group *cg)
	255	{
	256	struct dev_context *devc;
	257
	258	(void)cg;
	259
	260	switch (id) {
	261	case SR_CONF_SAMPLERATE:
	262	if (!sdi \|\| !(devc = sdi->priv))
	263	return SR_ERR_BUG;
	264	*data = g_variant_new_uint64(devc->cur_samplerate);
	265	break;
	266	default:
	267	return SR_ERR_NA;
	268	}
	269
	270	return SR_OK;
	271	}
	272
	273	static int config_set(int id, GVariant data, const struct sr_dev_inst sdi,
	274	const struct sr_channel_group *cg)
	275	{
	276	struct dev_context *devc;
	277
	278	(void)cg;
	279
	280	if (sdi->status != SR_ST_ACTIVE)
	281	return SR_ERR_DEV_CLOSED;
	282
	283	if (!(devc = sdi->priv))
	284	return SR_ERR_BUG;
	285
	286	switch (id) {
	287	case SR_CONF_SAMPLERATE:
	288	if (set_samplerate(sdi, g_variant_get_uint64(data)) < 0)
	289	return SR_ERR;
	290	break;
	291	case SR_CONF_LIMIT_MSEC:
	292	if (g_variant_get_uint64(data) == 0)
	293	return SR_ERR_ARG;
	294	devc->limit_msec = g_variant_get_uint64(data);
	295	break;
	296	case SR_CONF_LIMIT_SAMPLES:
	297	if (g_variant_get_uint64(data) == 0)
	298	return SR_ERR_ARG;
	299	devc->limit_samples = g_variant_get_uint64(data);
	300	break;
	301	default:
	302	return SR_ERR_NA;
	303	}
	304
	305	return SR_OK;
	306	}
	307
	308	static int config_list(int key, GVariant *data, const struct sr_dev_inst sdi,
	309	const struct sr_channel_group *cg)
	310	{
	311	GVariant gvar, grange[2];
	312	GVariantBuilder gvb;
	313
	314	(void)sdi;
	315	(void)cg;
	316
	317	switch (key) {
	318	case SR_CONF_DEVICE_OPTIONS:
	319	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
	320	cv_hwcaps, ARRAY_SIZE(cv_hwcaps),
	321	sizeof(int32_t));
	322	break;
	323	case SR_CONF_SAMPLERATE:
	324	cv_fill_samplerates_if_needed();
	325	g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
	326	gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
	327	cv_samplerates, ARRAY_SIZE(cv_samplerates),
	328	sizeof(uint64_t));
	329	g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
	330	*data = g_variant_builder_end(&gvb);
	331	break;
	332	case SR_CONF_LIMIT_SAMPLES:
	333	grange[0] = g_variant_new_uint64(0);
	334	grange[1] = g_variant_new_uint64(MAX_NUM_SAMPLES);
	335	*data = g_variant_new_tuple(grange, 2);
	336	break;
	337	case SR_CONF_TRIGGER_TYPE:
	338	*data = g_variant_new_string(TRIGGER_TYPE);
	339	break;
	340	default:
	341	return SR_ERR_NA;
	342	}
	343
	344	return SR_OK;
	345	}
	346
	347	static int receive_data(int fd, int revents, void *cb_data)
	348	{
	349	int i, ret;
	350	struct sr_dev_inst *sdi;
	351	struct dev_context *devc;
	352
	353	(void)fd;
	354	(void)revents;
	355
	356	if (!(sdi = cb_data)) {
	357	sr_err("cb_data was NULL.");
	358	return FALSE;
	359	}
	360
	361	if (!(devc = sdi->priv)) {
	362	sr_err("sdi->priv was NULL.");
	363	return FALSE;
	364	}
	365
	366	if (!devc->ftdic) {
	367	sr_err("devc->ftdic was NULL.");
	368	return FALSE;
	369	}
	370
	371	/* Get one block of data. */
	372	if ((ret = cv_read_block(devc)) < 0) {
	373	sr_err("Failed to read data block: %d.", ret);
	374	dev_acquisition_stop(sdi, sdi);
	375	return FALSE;
	376	}
	377
	378	/* We need to get exactly NUM_BLOCKS blocks (i.e. 8MB) of data. */
	379	if (devc->block_counter != (NUM_BLOCKS - 1)) {
	380	devc->block_counter++;
	381	return TRUE;
	382	}
	383
	384	sr_dbg("Sampling finished, sending data to session bus now.");
	385
	386	/* All data was received and demangled, send it to the session bus. */
	387	for (i = 0; i < NUM_BLOCKS; i++)
	388	cv_send_block_to_session_bus(devc, i);
	389
	390	dev_acquisition_stop(sdi, sdi);
	391
	392	return TRUE;
	393	}
	394
	395	static int dev_acquisition_start(const struct sr_dev_inst sdi, void cb_data)
	396	{
	397	struct dev_context *devc;
	398	uint8_t buf[4];
	399	int bytes_written;
	400
	401	if (sdi->status != SR_ST_ACTIVE)
	402	return SR_ERR_DEV_CLOSED;
	403
	404	if (!(devc = sdi->priv)) {
	405	sr_err("sdi->priv was NULL.");
	406	return SR_ERR_BUG;
	407	}
	408
	409	if (!devc->ftdic) {
	410	sr_err("devc->ftdic was NULL.");
	411	return SR_ERR_BUG;
	412	}
	413
	414	devc->divcount = cv_samplerate_to_divcount(devc->cur_samplerate);
	415	if (devc->divcount == 0xff) {
	416	sr_err("Invalid divcount/samplerate.");
	417	return SR_ERR;
	418	}
	419
	420	if (cv_configure_channels(sdi) != SR_OK) {
	421	sr_err("Failed to configure channels.");
	422	return SR_ERR;
	423	}
	424
	425	/* Fill acquisition parameters into buf[]. */
	426	buf[0] = devc->divcount;
	427	buf[1] = 0xff; /* This byte must always be 0xff. */
	428	buf[2] = devc->trigger_pattern;
	429	buf[3] = devc->trigger_mask;
	430
	431	/* Start acquisition. */
	432	bytes_written = cv_write(devc, buf, 4);
	433
	434	if (bytes_written < 0) {
	435	sr_err("Acquisition failed to start: %d.", bytes_written);
	436	return SR_ERR;
	437	} else if (bytes_written != 4) {
	438	sr_err("Acquisition failed to start: %d.", bytes_written);
	439	return SR_ERR;
	440	}
	441
	442	sr_dbg("Hardware acquisition started successfully.");
	443
	444	devc->cb_data = cb_data;
	445
	446	/* Send header packet to the session bus. */
	447	std_session_send_df_header(cb_data, LOG_PREFIX);
	448
	449	/* Time when we should be done (for detecting trigger timeouts). */
	450	devc->done = (devc->divcount + 1) * 0.08388608 + time(NULL)
	451	+ devc->trigger_timeout;
	452	devc->block_counter = 0;
	453	devc->trigger_found = 0;
	454
	455	/* Hook up a dummy handler to receive data from the device. */
	456	sr_source_add(-1, G_IO_IN, 0, receive_data, (void *)sdi);
	457
	458	return SR_OK;
	459	}
	460
	461	static int dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
	462	{
	463	struct sr_datafeed_packet packet;
	464
	465	(void)sdi;
	466
	467	sr_dbg("Stopping acquisition.");
	468	sr_source_remove(-1);
	469
	470	/* Send end packet to the session bus. */
	471	sr_dbg("Sending SR_DF_END.");
	472	packet.type = SR_DF_END;
	473	sr_session_send(cb_data, &packet);
	474
	475	return SR_OK;
	476	}
	477
	478	SR_PRIV struct sr_dev_driver chronovu_la8_driver_info = {
	479	.name = "chronovu-la8",
	480	.longname = "ChronoVu LA8",
	481	.api_version = 1,
	482	.init = init,
	483	.cleanup = cleanup,
	484	.scan = scan,
	485	.dev_list = dev_list,
	486	.dev_clear = dev_clear,
	487	.config_get = config_get,
	488	.config_set = config_set,
	489	.config_list = config_list,
	490	.dev_open = dev_open,
	491	.dev_close = dev_close,
	492	.dev_acquisition_start = dev_acquisition_start,
	493	.dev_acquisition_stop = dev_acquisition_stop,
	494	.priv = NULL,
	495	};