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

/*
 * This file is part of the sigrok project.
 *
 * Copyright (C) 2011-2012 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 <ftdi.h>
#include <glib.h>
#include <string.h>
#include "libsigrok.h"
#include "libsigrok-internal.h"
#include "driver.h"

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

/*
 * 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,
};

/* Function prototypes. */
static int hw_dev_acquisition_stop(const struct sr_dev_inst *sdi,
		void *cb_data);

static void clear_instances(void)
{
	GSList *l;
	struct sr_dev_inst *sdi;
	struct drv_context *drvc;
	struct dev_context *devc;

	drvc = cdi->priv;

	/* Properly close all devices. */
	for (l = drvc->instances; l; l = l->next) {
		if (!(sdi = l->data)) {
			/* Log error, but continue cleaning up the rest. */
			sr_err("la8: %s: sdi was NULL, continuing", __func__);
			continue;
		}
		if (sdi->priv) {
			devc = sdi->priv;
			ftdi_free(devc->ftdic);
		}
		sr_dev_inst_free(sdi);
	}
	g_slist_free(drvc->instances);
	drvc->instances = NULL;

}

static int hw_init(void)
{
	struct drv_context *drvc;

	if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
		sr_err("chronovu-la8: driver context malloc failed.");
		return SR_ERR;
	}
	cdi->priv = drvc;

	return SR_OK;
}

static GSList *hw_scan(GSList *options)
{
	struct sr_dev_inst *sdi;
	struct sr_probe *probe;
	struct drv_context *drvc;
	struct dev_context *devc;
	GSList *devices;
	unsigned int i;
	int ret;

	(void)options;
	drvc = cdi->priv;
	devices = NULL;

	/* Allocate memory for our private device context. */
	if (!(devc = g_try_malloc(sizeof(struct dev_context)))) {
		sr_err("la8: %s: struct context malloc failed", __func__);
		goto err_free_nothing;
	}

	/* 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->session_dev_id = 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 probes 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("la8: %s: final_buf malloc failed", __func__);
		goto err_free_devc;
	}

	/* Allocate memory for the FTDI context (ftdic) and initialize it. */
	if (!(devc->ftdic = ftdi_new())) {
		sr_err("la8: %s: ftdi_new failed", __func__);
		goto err_free_final_buf;
	}

	/* Check for the device and temporarily open it. */
	for (i = 0; i < ARRAY_SIZE(usb_pids); i++) {
		sr_dbg("la8: 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("la8: 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("la8: %s: sr_dev_inst_new failed", __func__);
		goto err_close_ftdic;
	}
	sdi->driver = cdi;
	sdi->priv = devc;

	for (i = 0; probe_names[i]; i++) {
		if (!(probe = sr_probe_new(i, SR_PROBE_ANALOG, TRUE,
				probe_names[i])))
			return NULL;
		sdi->probes = g_slist_append(sdi->probes, probe);
	}

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

	sr_spew("la8: Device init successful.");

	/* Close device. We'll reopen it again when we need it. */
	(void) la8_close(devc); /* Log, but ignore errors. */

	return devices;

err_close_ftdic:
	(void) la8_close(devc); /* Log, but ignore errors. */
err_free_ftdic:
	free(devc->ftdic); /* NOT g_free()! */
err_free_final_buf:
	g_free(devc->final_buf);
err_free_devc:
	g_free(devc);
err_free_nothing:

	return NULL;
}

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

	if (!(devc = sdi->priv)) {
		sr_err("la8: %s: sdi->priv was NULL", __func__);
		return SR_ERR_BUG;
	}

	sr_dbg("la8: 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("la8: %s: ftdi_usb_open_desc: (%d) %s",
		       __func__, ret, ftdi_get_error_string(devc->ftdic));
		(void) la8_close_usb_reset_sequencer(devc); /* Ignore errors. */
		return SR_ERR;
	}
	sr_dbg("la8: Device opened successfully.");

	/* Purge RX/TX buffers in the FTDI chip. */
	if ((ret = ftdi_usb_purge_buffers(devc->ftdic)) < 0) {
		sr_err("la8: %s: ftdi_usb_purge_buffers: (%d) %s",
		       __func__, ret, ftdi_get_error_string(devc->ftdic));
		(void) la8_close_usb_reset_sequencer(devc); /* Ignore errors. */
		goto err_dev_open_close_ftdic;
	}
	sr_dbg("la8: FTDI buffers purged successfully.");

	/* Enable flow control in the FTDI chip. */
	if ((ret = ftdi_setflowctrl(devc->ftdic, SIO_RTS_CTS_HS)) < 0) {
		sr_err("la8: %s: ftdi_setflowcontrol: (%d) %s",
		       __func__, ret, ftdi_get_error_string(devc->ftdic));
		(void) la8_close_usb_reset_sequencer(devc); /* Ignore errors. */
		goto err_dev_open_close_ftdic;
	}
	sr_dbg("la8: 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) la8_close(devc); /* Log, but ignore errors. */
	return SR_ERR;
}

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

	if (!(devc = sdi->priv)) {
		sr_err("la8: %s: sdi->priv was NULL", __func__);
		return SR_ERR_BUG;
	}

	sr_dbg("la8: Closing device.");

	if (sdi->status == SR_ST_ACTIVE) {
		sr_dbg("la8: Status ACTIVE, closing device.");
		(void) la8_close_usb_reset_sequencer(devc); /* Ignore errors. */
	} else {
		sr_spew("la8: Status not ACTIVE, nothing to do.");
	}

	sdi->status = SR_ST_INACTIVE;

	sr_dbg("la8: Freeing sample buffer.");
	g_free(devc->final_buf);

	return SR_OK;
}

static int hw_cleanup(void)
{

	if (!cdi->priv)
		return SR_OK;

	clear_instances();

	return SR_OK;
}

static int hw_info_get(int info_id, const void **data,
       const struct sr_dev_inst *sdi)
{
	struct dev_context *devc;

	switch (info_id) {
	case SR_DI_HWCAPS:
		*data = hwcaps;
		break;
	case SR_DI_NUM_PROBES:
		*data = GINT_TO_POINTER(NUM_PROBES);
		sr_spew("la8: %s: Returning number of probes: %d.", __func__,
			NUM_PROBES);
		break;
	case SR_DI_PROBE_NAMES:
		*data = probe_names;
		sr_spew("la8: %s: Returning probenames.", __func__);
		break;
	case SR_DI_SAMPLERATES:
		fill_supported_samplerates_if_needed();
		*data = &samplerates;
		sr_spew("la8: %s: Returning samplerates.", __func__);
		break;
	case SR_DI_TRIGGER_TYPES:
		*data = (char *)TRIGGER_TYPES;
		sr_spew("la8: %s: Returning trigger types: %s.", __func__,
			TRIGGER_TYPES);
		break;
	case SR_DI_CUR_SAMPLERATE:
		if (sdi) {
			devc = sdi->priv;
			*data = &devc->cur_samplerate;
			sr_spew("la8: %s: Returning samplerate: %" PRIu64 "Hz.",
				__func__, devc->cur_samplerate);
		} else
			return SR_ERR;
		break;
	default:
		return SR_ERR_ARG;
	}

	return SR_OK;
}

static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
		const void *value)
{
	struct dev_context *devc;

	if (!(devc = sdi->priv)) {
		sr_err("la8: %s: sdi->priv was NULL", __func__);
		return SR_ERR_BUG;
	}

	switch (hwcap) {
	case SR_HWCAP_SAMPLERATE:
		if (set_samplerate(sdi, *(const uint64_t *)value) == SR_ERR) {
			sr_err("la8: %s: setting samplerate failed.", __func__);
			return SR_ERR;
		}
		sr_dbg("la8: SAMPLERATE = %" PRIu64, devc->cur_samplerate);
		break;
	case SR_HWCAP_PROBECONFIG:
		if (configure_probes(devc, (const GSList *)value) != SR_OK) {
			sr_err("la8: %s: probe config failed.", __func__);
			return SR_ERR;
		}
		break;
	case SR_HWCAP_LIMIT_MSEC:
		if (*(const uint64_t *)value == 0) {
			sr_err("la8: %s: LIMIT_MSEC can't be 0.", __func__);
			return SR_ERR;
		}
		devc->limit_msec = *(const uint64_t *)value;
		sr_dbg("la8: LIMIT_MSEC = %" PRIu64, devc->limit_msec);
		break;
	case SR_HWCAP_LIMIT_SAMPLES:
		if (*(const uint64_t *)value < MIN_NUM_SAMPLES) {
			sr_err("la8: %s: LIMIT_SAMPLES too small.", __func__);
			return SR_ERR;
		}
		devc->limit_samples = *(const uint64_t *)value;
		sr_dbg("la8: LIMIT_SAMPLES = %" PRIu64, devc->limit_samples);
		break;
	default:
		/* Unknown capability, return SR_ERR. */
		sr_err("la8: %s: Unknown capability.", __func__);
		return SR_ERR;
		break;
	}

	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;

	/* Avoid compiler errors. */
	(void)fd;
	(void)revents;

	if (!(sdi = cb_data)) {
		sr_err("la8: %s: cb_data was NULL", __func__);
		return FALSE;
	}

	if (!(devc = sdi->priv)) {
		sr_err("la8: %s: sdi->priv was NULL", __func__);
		return FALSE;
	}

	if (!devc->ftdic) {
		sr_err("la8: %s: devc->ftdic was NULL", __func__);
		return FALSE;
	}

	/* Get one block of data. */
	if ((ret = la8_read_block(devc)) < 0) {
		sr_err("la8: %s: la8_read_block error: %d", __func__, ret);
		hw_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("la8: 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++)
		send_block_to_session_bus(devc, i);

	hw_dev_acquisition_stop(sdi, sdi);

	return TRUE;
}

static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
		void *cb_data)
{
	struct dev_context *devc;
	struct sr_datafeed_packet packet;
	struct sr_datafeed_header header;
	struct sr_datafeed_meta_logic meta;
	uint8_t buf[4];
	int bytes_written;

	if (!(devc = sdi->priv)) {
		sr_err("la8: %s: sdi->priv was NULL", __func__);
		return SR_ERR_BUG;
	}

	if (!devc->ftdic) {
		sr_err("la8: %s: devc->ftdic was NULL", __func__);
		return SR_ERR_BUG;
	}

	devc->divcount = samplerate_to_divcount(devc->cur_samplerate);
	if (devc->divcount == 0xff) {
		sr_err("la8: %s: invalid divcount/samplerate", __func__);
		return SR_ERR;
	}

	sr_dbg("la8: Starting acquisition.");

	/* 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 = la8_write(devc, buf, 4);

	if (bytes_written < 0) {
		sr_err("la8: Acquisition failed to start.");
		return SR_ERR;
	} else if (bytes_written != 4) {
		sr_err("la8: Acquisition failed to start.");
		return SR_ERR;
	}

	sr_dbg("la8: Acquisition started successfully.");

	devc->session_dev_id = cb_data;

	/* Send header packet to the session bus. */
	sr_dbg("la8: Sending SR_DF_HEADER.");
	packet.type = SR_DF_HEADER;
	packet.payload = &header;
	header.feed_version = 1;
	gettimeofday(&header.starttime, NULL);
	sr_session_send(devc->session_dev_id, &packet);

	/* Send metadata about the SR_DF_LOGIC packets to come. */
	packet.type = SR_DF_META_LOGIC;
	packet.payload = &meta;
	meta.samplerate = devc->cur_samplerate;
	meta.num_probes = NUM_PROBES;
	sr_session_send(devc->session_dev_id, &packet);

	/* 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 LA8. */
	sr_source_add(-1, G_IO_IN, 0, receive_data, (void *)sdi);

	return SR_OK;
}

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

	(void)sdi;

	sr_dbg("la8: Stopping acquisition.");
	sr_source_remove(-1);

	/* Send end packet to the session bus. */
	sr_dbg("la8: 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 = hw_init,
	.cleanup = hw_cleanup,
	.scan = hw_scan,
	.dev_open = hw_dev_open,
	.dev_close = hw_dev_close,
	.info_get = hw_info_get,
	.dev_config_set = hw_dev_config_set,
	.dev_acquisition_start = hw_dev_acquisition_start,
	.dev_acquisition_stop = hw_dev_acquisition_stop,
	.priv = NULL,
};
Commit	Line	Data
b908f067 UH	1	/*
	2	* This file is part of the sigrok project.
	3	*
	4	* Copyright (C) 2011-2012 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 <ftdi.h>
	22	#include <glib.h>
	23	#include <string.h>
45c59c8b BV	24	#include "libsigrok.h"
45c59c8b BV	25	#include "libsigrok-internal.h"
b908f067 UH	26	#include "driver.h"
b908f067 UH	27
765ef2f7 BV	28	SR_PRIV struct sr_dev_driver chronovu_la8_driver_info;
765ef2f7 BV	29	static struct sr_dev_driver *cdi = &chronovu_la8_driver_info;
b908f067	30
74e5f12d UH	31	/*
	32	* The ChronoVu LA8 can have multiple PIDs. Older versions shipped with
	33	* a standard FTDI USB VID/PID of 0403:6001, newer ones have 0403:8867.
	34	*/
	35	static const uint16_t usb_pids[] = {
	36	0x6001,
	37	0x8867,
	38	};
	39
b908f067	40	/* Function prototypes. */
3ffb6964 BV	41	static int hw_dev_acquisition_stop(const struct sr_dev_inst *sdi,
3ffb6964 BV	42	void *cb_data);
b908f067	43
c4f3ed4b BV	44	static void clear_instances(void)
	45	{
	46	GSList *l;
	47	struct sr_dev_inst *sdi;
1644fb24 BV	48	struct drv_context *drvc;
	49	struct dev_context *devc;
	50
	51	drvc = cdi->priv;
c4f3ed4b BV	52
c4f3ed4b BV	53	/* Properly close all devices. */
1644fb24	54	for (l = drvc->instances; l; l = l->next) {
c4f3ed4b BV	55	if (!(sdi = l->data)) {
	56	/* Log error, but continue cleaning up the rest. */
	57	sr_err("la8: %s: sdi was NULL, continuing", __func__);
	58	continue;
	59	}
	60	if (sdi->priv) {
1644fb24 BV	61	devc = sdi->priv;
1644fb24 BV	62	ftdi_free(devc->ftdic);
c4f3ed4b BV	63	}
	64	sr_dev_inst_free(sdi);
	65	}
1644fb24 BV	66	g_slist_free(drvc->instances);
1644fb24 BV	67	drvc->instances = NULL;
c4f3ed4b BV	68
	69	}
	70
40dda2c3	71	static int hw_init(void)
61136ea6	72	{
1644fb24	73	struct drv_context *drvc;
61136ea6	74
1644fb24 BV	75	if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
	76	sr_err("chronovu-la8: driver context malloc failed.");
	77	return SR_ERR;
	78	}
	79	cdi->priv = drvc;
61136ea6 BV	80
	81	return SR_OK;
	82	}
	83
c4f3ed4b	84	static GSList hw_scan(GSList options)
b908f067	85	{
b908f067	86	struct sr_dev_inst *sdi;
87ca93c5	87	struct sr_probe *probe;
1644fb24 BV	88	struct drv_context *drvc;
1644fb24 BV	89	struct dev_context *devc;
c4f3ed4b	90	GSList *devices;
9c4311c5 BV	91	unsigned int i;
9c4311c5 BV	92	int ret;
c4f3ed4b BV	93
c4f3ed4b BV	94	(void)options;
1644fb24	95	drvc = cdi->priv;
c4f3ed4b	96	devices = NULL;
b908f067	97
1644fb24 BV	98	/* Allocate memory for our private device context. */
1644fb24 BV	99	if (!(devc = g_try_malloc(sizeof(struct dev_context)))) {
b908f067 UH	100	sr_err("la8: %s: struct context malloc failed", __func__);
	101	goto err_free_nothing;
	102	}
	103
	104	/* Set some sane defaults. */
1644fb24 BV	105	devc->ftdic = NULL;
	106	devc->cur_samplerate = SR_MHZ(100); /* 100MHz == max. samplerate */
	107	devc->limit_msec = 0;
	108	devc->limit_samples = 0;
	109	devc->session_dev_id = NULL;
	110	memset(devc->mangled_buf, 0, BS);
	111	devc->final_buf = NULL;
	112	devc->trigger_pattern = 0x00; /* Value irrelevant, see trigger_mask. */
	113	devc->trigger_mask = 0x00; /* All probes are "don't care". */
	114	devc->trigger_timeout = 10; /* Default to 10s trigger timeout. */
	115	devc->trigger_found = 0;
	116	devc->done = 0;
	117	devc->block_counter = 0;
	118	devc->divcount = 0; /* 10ns sample period == 100MHz samplerate */
	119	devc->usb_pid = 0;
b908f067 UH	120
b908f067 UH	121	/* Allocate memory where we'll store the de-mangled data. */
1644fb24	122	if (!(devc->final_buf = g_try_malloc(SDRAM_SIZE))) {
b908f067	123	sr_err("la8: %s: final_buf malloc failed", __func__);
1644fb24	124	goto err_free_devc;
b908f067 UH	125	}
	126
	127	/* Allocate memory for the FTDI context (ftdic) and initialize it. */
1644fb24	128	if (!(devc->ftdic = ftdi_new())) {
b908f067 UH	129	sr_err("la8: %s: ftdi_new failed", __func__);
	130	goto err_free_final_buf;
	131	}
	132
	133	/* Check for the device and temporarily open it. */
74e5f12d UH	134	for (i = 0; i < ARRAY_SIZE(usb_pids); i++) {
	135	sr_dbg("la8: Probing for VID/PID %04x:%04x.", USB_VENDOR_ID,
	136	usb_pids[i]);
1644fb24	137	ret = ftdi_usb_open_desc(devc->ftdic, USB_VENDOR_ID,
74e5f12d UH	138	usb_pids[i], USB_DESCRIPTION, NULL);
	139	if (ret == 0) {
	140	sr_dbg("la8: Found LA8 device (%04x:%04x).",
	141	USB_VENDOR_ID, usb_pids[i]);
1644fb24	142	devc->usb_pid = usb_pids[i];
74e5f12d	143	}
b908f067	144	}
74e5f12d	145
1644fb24	146	if (devc->usb_pid == 0)
74e5f12d	147	goto err_free_ftdic;
b908f067 UH	148
	149	/* Register the device with libsigrok. */
	150	sdi = sr_dev_inst_new(0, SR_ST_INITIALIZING,
	151	USB_VENDOR_NAME, USB_MODEL_NAME, USB_MODEL_VERSION);
	152	if (!sdi) {
	153	sr_err("la8: %s: sr_dev_inst_new failed", __func__);
	154	goto err_close_ftdic;
	155	}
cfe8a84d	156	sdi->driver = cdi;
1644fb24	157	sdi->priv = devc;
b908f067	158
87ca93c5 BV	159	for (i = 0; probe_names[i]; i++) {
	160	if (!(probe = sr_probe_new(i, SR_PROBE_ANALOG, TRUE,
	161	probe_names[i])))
	162	return NULL;
	163	sdi->probes = g_slist_append(sdi->probes, probe);
	164	}
	165
c4f3ed4b	166	devices = g_slist_append(devices, sdi);
1644fb24	167	drvc->instances = g_slist_append(drvc->instances, sdi);
b908f067 UH	168
	169	sr_spew("la8: Device init successful.");
	170
	171	/* Close device. We'll reopen it again when we need it. */
1644fb24	172	(void) la8_close(devc); /* Log, but ignore errors. */
b908f067	173
c4f3ed4b	174	return devices;
b908f067 UH	175
b908f067 UH	176	err_close_ftdic:
1644fb24	177	(void) la8_close(devc); /* Log, but ignore errors. */
b908f067	178	err_free_ftdic:
1644fb24	179	free(devc->ftdic); /* NOT g_free()! */
b908f067	180	err_free_final_buf:
1644fb24 BV	181	g_free(devc->final_buf);
	182	err_free_devc:
	183	g_free(devc);
b908f067 UH	184	err_free_nothing:
b908f067 UH	185
c4f3ed4b	186	return NULL;
b908f067 UH	187	}
b908f067 UH	188
25a0f108	189	static int hw_dev_open(struct sr_dev_inst *sdi)
b908f067	190	{
1644fb24	191	struct dev_context *devc;
25a0f108	192	int ret;
b908f067	193
1644fb24	194	if (!(devc = sdi->priv)) {
b908f067 UH	195	sr_err("la8: %s: sdi->priv was NULL", __func__);
	196	return SR_ERR_BUG;
	197	}
	198
	199	sr_dbg("la8: Opening LA8 device (%04x:%04x).", USB_VENDOR_ID,
1644fb24	200	devc->usb_pid);
b908f067 UH	201
b908f067 UH	202	/* Open the device. */
1644fb24 BV	203	if ((ret = ftdi_usb_open_desc(devc->ftdic, USB_VENDOR_ID,
1644fb24 BV	204	devc->usb_pid, USB_DESCRIPTION, NULL)) < 0) {
b908f067	205	sr_err("la8: %s: ftdi_usb_open_desc: (%d) %s",
1644fb24 BV	206	__func__, ret, ftdi_get_error_string(devc->ftdic));
1644fb24 BV	207	(void) la8_close_usb_reset_sequencer(devc); /* Ignore errors. */
b908f067 UH	208	return SR_ERR;
	209	}
	210	sr_dbg("la8: Device opened successfully.");
	211
	212	/* Purge RX/TX buffers in the FTDI chip. */
1644fb24	213	if ((ret = ftdi_usb_purge_buffers(devc->ftdic)) < 0) {
b908f067	214	sr_err("la8: %s: ftdi_usb_purge_buffers: (%d) %s",
1644fb24 BV	215	__func__, ret, ftdi_get_error_string(devc->ftdic));
1644fb24 BV	216	(void) la8_close_usb_reset_sequencer(devc); /* Ignore errors. */
b908f067 UH	217	goto err_dev_open_close_ftdic;
	218	}
	219	sr_dbg("la8: FTDI buffers purged successfully.");
	220
	221	/* Enable flow control in the FTDI chip. */
1644fb24	222	if ((ret = ftdi_setflowctrl(devc->ftdic, SIO_RTS_CTS_HS)) < 0) {
b908f067	223	sr_err("la8: %s: ftdi_setflowcontrol: (%d) %s",
1644fb24 BV	224	__func__, ret, ftdi_get_error_string(devc->ftdic));
1644fb24 BV	225	(void) la8_close_usb_reset_sequencer(devc); /* Ignore errors. */
b908f067 UH	226	goto err_dev_open_close_ftdic;
	227	}
	228	sr_dbg("la8: FTDI flow control enabled successfully.");
	229
	230	/* Wait 100ms. */
	231	g_usleep(100 * 1000);
	232
	233	sdi->status = SR_ST_ACTIVE;
	234
	235	return SR_OK;
	236
	237	err_dev_open_close_ftdic:
1644fb24	238	(void) la8_close(devc); /* Log, but ignore errors. */
b908f067 UH	239	return SR_ERR;
	240	}
	241
25a0f108	242	static int hw_dev_close(struct sr_dev_inst *sdi)
b908f067	243	{
1644fb24	244	struct dev_context *devc;
b908f067	245
1644fb24	246	if (!(devc = sdi->priv)) {
b908f067 UH	247	sr_err("la8: %s: sdi->priv was NULL", __func__);
	248	return SR_ERR_BUG;
	249	}
	250
	251	sr_dbg("la8: Closing device.");
	252
	253	if (sdi->status == SR_ST_ACTIVE) {
	254	sr_dbg("la8: Status ACTIVE, closing device.");
1644fb24	255	(void) la8_close_usb_reset_sequencer(devc); /* Ignore errors. */
b908f067 UH	256	} else {
	257	sr_spew("la8: Status not ACTIVE, nothing to do.");
	258	}
	259
	260	sdi->status = SR_ST_INACTIVE;
	261
	262	sr_dbg("la8: Freeing sample buffer.");
1644fb24	263	g_free(devc->final_buf);
b908f067 UH	264
	265	return SR_OK;
	266	}
	267
	268	static int hw_cleanup(void)
	269	{
b908f067	270
cf1ebd54 BV	271	if (!cdi->priv)
	272	return SR_OK;
	273
c4f3ed4b	274	clear_instances();
b908f067	275
c4f3ed4b	276	return SR_OK;
b908f067 UH	277	}
b908f067 UH	278
6a2761fd BV	279	static int hw_info_get(int info_id, const void **data,
6a2761fd BV	280	const struct sr_dev_inst *sdi)
b908f067	281	{
1644fb24	282	struct dev_context *devc;
b908f067	283
6a2761fd	284	switch (info_id) {
7566601c BV	285	case SR_DI_HWCAPS:
	286	*data = hwcaps;
	287	break;
b908f067	288	case SR_DI_NUM_PROBES:
6a2761fd	289	*data = GINT_TO_POINTER(NUM_PROBES);
b908f067 UH	290	sr_spew("la8: %s: Returning number of probes: %d.", __func__,
	291	NUM_PROBES);
	292	break;
	293	case SR_DI_PROBE_NAMES:
6a2761fd	294	*data = probe_names;
b908f067 UH	295	sr_spew("la8: %s: Returning probenames.", __func__);
	296	break;
	297	case SR_DI_SAMPLERATES:
	298	fill_supported_samplerates_if_needed();
6a2761fd	299	*data = &samplerates;
b908f067 UH	300	sr_spew("la8: %s: Returning samplerates.", __func__);
	301	break;
	302	case SR_DI_TRIGGER_TYPES:
6a2761fd	303	data = (char )TRIGGER_TYPES;
b908f067 UH	304	sr_spew("la8: %s: Returning trigger types: %s.", __func__,
	305	TRIGGER_TYPES);
	306	break;
	307	case SR_DI_CUR_SAMPLERATE:
6a2761fd	308	if (sdi) {
1644fb24 BV	309	devc = sdi->priv;
1644fb24 BV	310	*data = &devc->cur_samplerate;
6a2761fd	311	sr_spew("la8: %s: Returning samplerate: %" PRIu64 "Hz.",
1644fb24	312	__func__, devc->cur_samplerate);
6a2761fd BV	313	} else
6a2761fd BV	314	return SR_ERR;
b908f067	315	break;
cfe8a84d BV	316	default:
cfe8a84d BV	317	return SR_ERR_ARG;
b908f067 UH	318	}
b908f067 UH	319
6a2761fd	320	return SR_OK;
b908f067 UH	321	}
b908f067 UH	322
6f4b1868 BV	323	static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
6f4b1868 BV	324	const void *value)
b908f067	325	{
1644fb24	326	struct dev_context *devc;
b908f067	327
1644fb24	328	if (!(devc = sdi->priv)) {
b908f067 UH	329	sr_err("la8: %s: sdi->priv was NULL", __func__);
	330	return SR_ERR_BUG;
	331	}
	332
b908f067 UH	333	switch (hwcap) {
	334	case SR_HWCAP_SAMPLERATE:
	335	if (set_samplerate(sdi, (const uint64_t )value) == SR_ERR) {
	336	sr_err("la8: %s: setting samplerate failed.", __func__);
	337	return SR_ERR;
	338	}
1644fb24	339	sr_dbg("la8: SAMPLERATE = %" PRIu64, devc->cur_samplerate);
b908f067 UH	340	break;
b908f067 UH	341	case SR_HWCAP_PROBECONFIG:
1644fb24	342	if (configure_probes(devc, (const GSList *)value) != SR_OK) {
b908f067 UH	343	sr_err("la8: %s: probe config failed.", __func__);
	344	return SR_ERR;
	345	}
	346	break;
	347	case SR_HWCAP_LIMIT_MSEC:
	348	if ((const uint64_t )value == 0) {
	349	sr_err("la8: %s: LIMIT_MSEC can't be 0.", __func__);
	350	return SR_ERR;
	351	}
1644fb24 BV	352	devc->limit_msec = (const uint64_t )value;
1644fb24 BV	353	sr_dbg("la8: LIMIT_MSEC = %" PRIu64, devc->limit_msec);
b908f067 UH	354	break;
	355	case SR_HWCAP_LIMIT_SAMPLES:
	356	if ((const uint64_t )value < MIN_NUM_SAMPLES) {
	357	sr_err("la8: %s: LIMIT_SAMPLES too small.", __func__);
	358	return SR_ERR;
	359	}
1644fb24 BV	360	devc->limit_samples = (const uint64_t )value;
1644fb24 BV	361	sr_dbg("la8: LIMIT_SAMPLES = %" PRIu64, devc->limit_samples);
b908f067 UH	362	break;
	363	default:
	364	/* Unknown capability, return SR_ERR. */
	365	sr_err("la8: %s: Unknown capability.", __func__);
	366	return SR_ERR;
	367	break;
	368	}
	369
	370	return SR_OK;
	371	}
	372
	373	static int receive_data(int fd, int revents, void *cb_data)
	374	{
	375	int i, ret;
	376	struct sr_dev_inst *sdi;
1644fb24	377	struct dev_context *devc;
b908f067 UH	378
	379	/* Avoid compiler errors. */
	380	(void)fd;
	381	(void)revents;
	382
	383	if (!(sdi = cb_data)) {
	384	sr_err("la8: %s: cb_data was NULL", __func__);
	385	return FALSE;
	386	}
	387
1644fb24	388	if (!(devc = sdi->priv)) {
b908f067 UH	389	sr_err("la8: %s: sdi->priv was NULL", __func__);
	390	return FALSE;
	391	}
	392
1644fb24 BV	393	if (!devc->ftdic) {
1644fb24 BV	394	sr_err("la8: %s: devc->ftdic was NULL", __func__);
b908f067 UH	395	return FALSE;
	396	}
	397
	398	/* Get one block of data. */
1644fb24	399	if ((ret = la8_read_block(devc)) < 0) {
b908f067	400	sr_err("la8: %s: la8_read_block error: %d", __func__, ret);
3ffb6964	401	hw_dev_acquisition_stop(sdi, sdi);
b908f067 UH	402	return FALSE;
	403	}
	404
	405	/* We need to get exactly NUM_BLOCKS blocks (i.e. 8MB) of data. */
1644fb24 BV	406	if (devc->block_counter != (NUM_BLOCKS - 1)) {
1644fb24 BV	407	devc->block_counter++;
b908f067 UH	408	return TRUE;
	409	}
	410
	411	sr_dbg("la8: Sampling finished, sending data to session bus now.");
	412
	413	/* All data was received and demangled, send it to the session bus. */
	414	for (i = 0; i < NUM_BLOCKS; i++)
1644fb24	415	send_block_to_session_bus(devc, i);
b908f067	416
3ffb6964	417	hw_dev_acquisition_stop(sdi, sdi);
b908f067	418
b908f067 UH	419	return TRUE;
	420	}
	421
3ffb6964 BV	422	static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
3ffb6964 BV	423	void *cb_data)
b908f067	424	{
1644fb24	425	struct dev_context *devc;
b908f067 UH	426	struct sr_datafeed_packet packet;
	427	struct sr_datafeed_header header;
	428	struct sr_datafeed_meta_logic meta;
	429	uint8_t buf[4];
	430	int bytes_written;
	431
1644fb24	432	if (!(devc = sdi->priv)) {
b908f067 UH	433	sr_err("la8: %s: sdi->priv was NULL", __func__);
	434	return SR_ERR_BUG;
	435	}
	436
1644fb24 BV	437	if (!devc->ftdic) {
1644fb24 BV	438	sr_err("la8: %s: devc->ftdic was NULL", __func__);
b908f067 UH	439	return SR_ERR_BUG;
	440	}
	441
1644fb24 BV	442	devc->divcount = samplerate_to_divcount(devc->cur_samplerate);
1644fb24 BV	443	if (devc->divcount == 0xff) {
b908f067 UH	444	sr_err("la8: %s: invalid divcount/samplerate", __func__);
	445	return SR_ERR;
	446	}
	447
	448	sr_dbg("la8: Starting acquisition.");
	449
	450	/* Fill acquisition parameters into buf[]. */
1644fb24	451	buf[0] = devc->divcount;
b908f067	452	buf[1] = 0xff; /* This byte must always be 0xff. */
1644fb24 BV	453	buf[2] = devc->trigger_pattern;
1644fb24 BV	454	buf[3] = devc->trigger_mask;
b908f067 UH	455
b908f067 UH	456	/* Start acquisition. */
1644fb24	457	bytes_written = la8_write(devc, buf, 4);
b908f067 UH	458
	459	if (bytes_written < 0) {
	460	sr_err("la8: Acquisition failed to start.");
	461	return SR_ERR;
	462	} else if (bytes_written != 4) {
	463	sr_err("la8: Acquisition failed to start.");
afc88319	464	return SR_ERR;
b908f067 UH	465	}
	466
	467	sr_dbg("la8: Acquisition started successfully.");
	468
1644fb24	469	devc->session_dev_id = cb_data;
b908f067 UH	470
	471	/* Send header packet to the session bus. */
	472	sr_dbg("la8: Sending SR_DF_HEADER.");
	473	packet.type = SR_DF_HEADER;
	474	packet.payload = &header;
	475	header.feed_version = 1;
	476	gettimeofday(&header.starttime, NULL);
1644fb24	477	sr_session_send(devc->session_dev_id, &packet);
b908f067 UH	478
	479	/* Send metadata about the SR_DF_LOGIC packets to come. */
	480	packet.type = SR_DF_META_LOGIC;
	481	packet.payload = &meta;
1644fb24	482	meta.samplerate = devc->cur_samplerate;
b908f067	483	meta.num_probes = NUM_PROBES;
1644fb24	484	sr_session_send(devc->session_dev_id, &packet);
b908f067 UH	485
b908f067 UH	486	/* Time when we should be done (for detecting trigger timeouts). */
1644fb24 BV	487	devc->done = (devc->divcount + 1) * 0.08388608 + time(NULL)
	488	+ devc->trigger_timeout;
	489	devc->block_counter = 0;
	490	devc->trigger_found = 0;
b908f067 UH	491
b908f067 UH	492	/* Hook up a dummy handler to receive data from the LA8. */
3ffb6964	493	sr_source_add(-1, G_IO_IN, 0, receive_data, (void *)sdi);
b908f067 UH	494
	495	return SR_OK;
	496	}
	497
3ffb6964 BV	498	static int hw_dev_acquisition_stop(const struct sr_dev_inst *sdi,
3ffb6964 BV	499	void *cb_data)
b908f067	500	{
b908f067 UH	501	struct sr_datafeed_packet packet;
b908f067 UH	502
afc88319	503	(void)sdi;
b908f067	504
afc88319	505	sr_dbg("la8: Stopping acquisition.");
7021f985 BV	506	sr_source_remove(-1);
7021f985 BV	507
b908f067 UH	508	/* Send end packet to the session bus. */
	509	sr_dbg("la8: Sending SR_DF_END.");
	510	packet.type = SR_DF_END;
	511	sr_session_send(cb_data, &packet);
	512
	513	return SR_OK;
	514	}
	515
	516	SR_PRIV struct sr_dev_driver chronovu_la8_driver_info = {
	517	.name = "chronovu-la8",
	518	.longname = "ChronoVu LA8",
	519	.api_version = 1,
	520	.init = hw_init,
	521	.cleanup = hw_cleanup,
61136ea6	522	.scan = hw_scan,
b908f067 UH	523	.dev_open = hw_dev_open,
b908f067 UH	524	.dev_close = hw_dev_close,
6a2761fd	525	.info_get = hw_info_get,
b908f067 UH	526	.dev_config_set = hw_dev_config_set,
	527	.dev_acquisition_start = hw_dev_acquisition_start,
	528	.dev_acquisition_stop = hw_dev_acquisition_stop,
1644fb24	529	.priv = NULL,
b908f067	530	};