[libsigrok.git] / src / hardware / dslogic / dslogic.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
 * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
 *
 * 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 <math.h>
#include <glib.h>
#include <glib/gstdio.h>
#include "protocol.h"
#include "dslogic.h"

/*
 * This should be larger than the FPGA bitstream image so that it'll get
 * uploaded in one big operation. There seem to be issues when uploading
 * it in chunks.
 */
#define FW_BUFSIZE (1024 * 1024)

#define FPGA_UPLOAD_DELAY (10 * 1000)

#define USB_TIMEOUT (3 * 1000)

SR_PRIV int dslogic_fpga_firmware_upload(const struct sr_dev_inst *sdi)
{
	const char *name = NULL;
	uint64_t sum;
	struct sr_resource bitstream;
	struct drv_context *drvc;
	struct dev_context *devc;
	struct sr_usb_dev_inst *usb;
	unsigned char *buf;
	ssize_t chunksize;
	int transferred;
	int result, ret;
	const uint8_t cmd[3] = {0, 0, 0};

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

	if (!strcmp(devc->profile->model, "DSLogic")) {
		if (devc->cur_threshold < 1.40)
			name = DSLOGIC_FPGA_FIRMWARE_3V3;
		else
			name = DSLOGIC_FPGA_FIRMWARE_5V;
	} else if (!strcmp(devc->profile->model, "DSLogic Pro")){
		name = DSLOGIC_PRO_FPGA_FIRMWARE;
	} else if (!strcmp(devc->profile->model, "DSLogic Plus")){
		name = DSLOGIC_PLUS_FPGA_FIRMWARE;
	} else if (!strcmp(devc->profile->model, "DSLogic Basic")){
		name = DSLOGIC_BASIC_FPGA_FIRMWARE;
	} else if (!strcmp(devc->profile->model, "DSCope")) {
		name = DSCOPE_FPGA_FIRMWARE;
	} else {
		sr_err("Failed to select FPGA firmware.");
		return SR_ERR;
	}

	sr_dbg("Uploading FPGA firmware '%s'.", name);

	result = sr_resource_open(drvc->sr_ctx, &bitstream,
			SR_RESOURCE_FIRMWARE, name);
	if (result != SR_OK)
		return result;

	/* Tell the device firmware is coming. */
	if ((ret = libusb_control_transfer(usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR |
			LIBUSB_ENDPOINT_OUT, DS_CMD_CONFIG, 0x0000, 0x0000,
			(unsigned char *)&cmd, sizeof(cmd), USB_TIMEOUT)) < 0) {
		sr_err("Failed to upload FPGA firmware: %s.", libusb_error_name(ret));
		sr_resource_close(drvc->sr_ctx, &bitstream);
		return SR_ERR;
	}

	/* Give the FX2 time to get ready for FPGA firmware upload. */
	g_usleep(FPGA_UPLOAD_DELAY);

	buf = g_malloc(FW_BUFSIZE);
	sum = 0;
	result = SR_OK;
	while (1) {
		chunksize = sr_resource_read(drvc->sr_ctx, &bitstream,
				buf, FW_BUFSIZE);
		if (chunksize < 0)
			result = SR_ERR;
		if (chunksize <= 0)
			break;

		if ((ret = libusb_bulk_transfer(usb->devhdl, 2 | LIBUSB_ENDPOINT_OUT,
				buf, chunksize, &transferred, USB_TIMEOUT)) < 0) {
			sr_err("Unable to configure FPGA firmware: %s.",
					libusb_error_name(ret));
			result = SR_ERR;
			break;
		}
		sum += transferred;
		sr_spew("Uploaded %" PRIu64 "/%" PRIu64 " bytes.",
			sum, bitstream.size);

		if (transferred != chunksize) {
			sr_err("Short transfer while uploading FPGA firmware.");
			result = SR_ERR;
			break;
		}
	}
	g_free(buf);
	sr_resource_close(drvc->sr_ctx, &bitstream);

	if (result == SR_OK)
		sr_dbg("FPGA firmware upload done.");

	return result;
}

SR_PRIV int dslogic_start_acquisition(const struct sr_dev_inst *sdi)
{
	struct sr_usb_dev_inst *usb;
	struct dslogic_mode mode;
	int ret;

	mode.flags = DS_START_FLAGS_MODE_LA | DS_START_FLAGS_SAMPLE_WIDE;
	mode.sample_delay_h = mode.sample_delay_l = 0;

	usb = sdi->conn;
	ret = libusb_control_transfer(usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR |
			LIBUSB_ENDPOINT_OUT, DS_CMD_START, 0x0000, 0x0000,
			(unsigned char *)&mode, sizeof(mode), USB_TIMEOUT);
	if (ret < 0) {
		sr_err("Failed to send start command: %s.", libusb_error_name(ret));
		return SR_ERR;
	}

	return SR_OK;
}

SR_PRIV int dslogic_stop_acquisition(const struct sr_dev_inst *sdi)
{
	struct sr_usb_dev_inst *usb;
	struct dslogic_mode mode;
	int ret;

	mode.flags = DS_START_FLAGS_STOP;
	mode.sample_delay_h = mode.sample_delay_l = 0;

	usb = sdi->conn;
	ret = libusb_control_transfer(usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR |
			LIBUSB_ENDPOINT_OUT, DS_CMD_START, 0x0000, 0x0000,
			(unsigned char *)&mode, sizeof(struct dslogic_mode), USB_TIMEOUT);
	if (ret < 0) {
		sr_err("Failed to send stop command: %s.", libusb_error_name(ret));
		return SR_ERR;
	}

	return SR_OK;
}

/*
 * Get the session trigger and configure the FPGA structure
 * accordingly.
 */
static void dslogic_set_trigger(const struct sr_dev_inst *sdi,
	struct dslogic_fpga_config *cfg)
{
	struct sr_trigger *trigger;
	struct sr_trigger_stage *stage;
	struct sr_trigger_match *match;
	struct dev_context *devc;
	const GSList *l, *m;
	int num_enabled_channels = 0, num_trigger_stages = 0;
	int channelbit, i = 0;
	uint32_t trigger_point;

	devc = sdi->priv;

	cfg->ch_en = 0;
	for (l = sdi->channels; l; l = l->next) {
		const struct sr_channel *const probe = (struct sr_channel *)l->data;
		if (probe->enabled) {
			num_enabled_channels++;
			cfg->ch_en |= 1 << probe->index;
		}
	}

	cfg->trig_mask0[0] = 0xffff;
	cfg->trig_mask1[0] = 0xffff;

	cfg->trig_value0[0] = 0;
	cfg->trig_value1[0] = 0;

	cfg->trig_edge0[0] = 0;
	cfg->trig_edge1[0] = 0;

	cfg->trig_logic0[0] = 2;
	cfg->trig_logic1[0] = 2;

	cfg->trig_count[0] = 0;

	cfg->trig_glb = num_enabled_channels << 4;

	for (i = 1; i < NUM_TRIGGER_STAGES; i++) {
		cfg->trig_mask0[i] = 0xffff;
		cfg->trig_mask1[i] = 0xffff;
		cfg->trig_value0[i] = 0;
		cfg->trig_value1[i] = 0;
		cfg->trig_edge0[i] = 0;
		cfg->trig_edge1[i] = 0;
		cfg->trig_logic0[i] = 2;
		cfg->trig_logic1[i] = 2;
		cfg->trig_count[i] = 0;
	}

	trigger_point = (devc->capture_ratio * devc->limit_samples) / 100;
	if (trigger_point < DSLOGIC_ATOMIC_SAMPLES)
		trigger_point = DSLOGIC_ATOMIC_SAMPLES;
	const uint32_t mem_depth = devc->profile->mem_depth;
	const uint32_t max_trigger_point = devc->continuous_mode ? ((mem_depth * 10) / 100) :
		((mem_depth * DS_MAX_TRIG_PERCENT) / 100);
	if (trigger_point > max_trigger_point)
		trigger_point = max_trigger_point;
	cfg->trig_pos = trigger_point & ~(DSLOGIC_ATOMIC_SAMPLES - 1);

	if (!(trigger = sr_session_trigger_get(sdi->session))) {
		sr_dbg("No session trigger found");
		return;
	}

	for (l = trigger->stages; l; l = l->next) {
		stage = l->data;
		num_trigger_stages++;
		for (m = stage->matches; m; m = m->next) {
			match = m->data;
			if (!match->channel->enabled)
				/* Ignore disabled channels with a trigger. */
				continue;
			channelbit = 1 << (match->channel->index);
			/* Simple trigger support (event). */
			if (match->match == SR_TRIGGER_ONE) {
				cfg->trig_mask0[0] &= ~channelbit;
				cfg->trig_mask1[0] &= ~channelbit;
				cfg->trig_value0[0] |= channelbit;
				cfg->trig_value1[0] |= channelbit;
			} else if (match->match == SR_TRIGGER_ZERO) {
				cfg->trig_mask0[0] &= ~channelbit;
				cfg->trig_mask1[0] &= ~channelbit;
			} else if (match->match == SR_TRIGGER_FALLING) {
				cfg->trig_mask0[0] &= ~channelbit;
				cfg->trig_mask1[0] &= ~channelbit;
				cfg->trig_edge0[0] |= channelbit;
				cfg->trig_edge1[0] |= channelbit;
			} else if (match->match == SR_TRIGGER_RISING) {
				cfg->trig_mask0[0] &= ~channelbit;
				cfg->trig_mask1[0] &= ~channelbit;
				cfg->trig_value0[0] |= channelbit;
				cfg->trig_value1[0] |= channelbit;
				cfg->trig_edge0[0] |= channelbit;
				cfg->trig_edge1[0] |= channelbit;
			} else if (match->match == SR_TRIGGER_EDGE) {
				cfg->trig_edge0[0] |= channelbit;
				cfg->trig_edge1[0] |= channelbit;
			}
		}
	}

	cfg->trig_glb |= num_trigger_stages;

	return;
}

SR_PRIV int dslogic_fpga_configure(const struct sr_dev_inst *sdi)
{
	struct dev_context *devc;
	struct sr_usb_dev_inst *usb;
	uint8_t c[3];
	struct dslogic_fpga_config cfg;
	uint16_t v16;
	uint32_t v32;
	int transferred, len, ret;

	sr_dbg("Configuring FPGA.");

	usb = sdi->conn;
	devc = sdi->priv;

	WL32(&cfg.sync, DS_CFG_START);
	WL16(&cfg.mode_header, DS_CFG_MODE);
	WL16(&cfg.divider_header, DS_CFG_DIVIDER);
	WL16(&cfg.count_header, DS_CFG_COUNT);
	WL16(&cfg.trig_pos_header, DS_CFG_TRIG_POS);
	WL16(&cfg.trig_glb_header, DS_CFG_TRIG_GLB);
	WL16(&cfg.ch_en_header, DS_CFG_CH_EN);
	WL16(&cfg.trig_header, DS_CFG_TRIG);
	WL32(&cfg.end_sync, DS_CFG_END);

	/* Pass in the length of a fixed-size struct. Really. */
	len = sizeof(struct dslogic_fpga_config) / 2;
	c[0] = len & 0xff;
	c[1] = (len >> 8) & 0xff;
	c[2] = (len >> 16) & 0xff;

	ret = libusb_control_transfer(usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR |
			LIBUSB_ENDPOINT_OUT, DS_CMD_SETTING, 0x0000, 0x0000,
			c, sizeof(c), USB_TIMEOUT);
	if (ret < 0) {
		sr_err("Failed to send FPGA configure command: %s.",
			libusb_error_name(ret));
		return SR_ERR;
	}

	v16 = 0x0000;

	if (devc->mode == DS_OP_INTERNAL_TEST)
		v16 = DS_MODE_INT_TEST;
	else if (devc->mode == DS_OP_EXTERNAL_TEST)
		v16 = DS_MODE_EXT_TEST;
	else if (devc->mode == DS_OP_LOOPBACK_TEST)
		v16 = DS_MODE_LPB_TEST;

	if (devc->cur_samplerate == DS_MAX_LOGIC_SAMPLERATE * 2)
		v16 |= DS_MODE_HALF_MODE;
	else if (devc->cur_samplerate == DS_MAX_LOGIC_SAMPLERATE * 4)
		v16 |= DS_MODE_QUAR_MODE;

	if (devc->continuous_mode)
		v16 |= DS_MODE_STREAM_MODE;
	if (devc->external_clock) {
		v16 |= DS_MODE_CLK_TYPE;
		if (devc->clock_edge == DS_EDGE_FALLING)
			v16 |= DS_MODE_CLK_EDGE;
	}
	if (devc->limit_samples > DS_MAX_LOGIC_DEPTH *
		ceil(devc->cur_samplerate * 1.0 / DS_MAX_LOGIC_SAMPLERATE)
		&& !devc->continuous_mode) {
		/* Enable RLE for long captures.
		 * Without this, captured data present errors.
		 */
		v16 |= DS_MODE_RLE_MODE;
	}

	WL16(&cfg.mode, v16);
	v32 = ceil(DS_MAX_LOGIC_SAMPLERATE * 1.0 / devc->cur_samplerate);
	WL32(&cfg.divider, v32);

	/* Number of 16-sample units. */
	WL32(&cfg.count, devc->limit_samples / 16);

	dslogic_set_trigger(sdi, &cfg);

	len = sizeof(struct dslogic_fpga_config);
	ret = libusb_bulk_transfer(usb->devhdl, 2 | LIBUSB_ENDPOINT_OUT,
			(unsigned char *)&cfg, len, &transferred, USB_TIMEOUT);
	if (ret < 0 || transferred != len) {
		sr_err("Failed to send FPGA configuration: %s.", libusb_error_name(ret));
		return SR_ERR;
	}

	return SR_OK;
}

static int to_bytes_per_ms(struct dev_context *devc)
{
	if (devc->cur_samplerate > SR_MHZ(100))
		return SR_MHZ(100) / 1000 * 2;
	return devc->cur_samplerate / 1000 * 2;
}

static size_t get_buffer_size(struct dev_context *devc)
{
	size_t s;

	/*
	 * The buffer should be large enough to hold 10ms of data and
	 * a multiple of 512.
	 */
	s = 10 * to_bytes_per_ms(devc);
	// s = to_bytes_per_ms(devc->cur_samplerate);
	return (s + 511) & ~511;
}

SR_PRIV int dslogic_get_number_of_transfers(struct dev_context *devc)
{
	unsigned int n;

	/* Total buffer size should be able to hold about 100ms of data. */
	n = (100 * to_bytes_per_ms(devc) / get_buffer_size(devc));
	sr_info("New calculation: %d", n);

	if (n > NUM_SIMUL_TRANSFERS)
		return NUM_SIMUL_TRANSFERS;

	return n;
}
Commit	Line	Data
	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
	5	* Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
	6	*
	7	* This program is free software: you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation, either version 3 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	19	*/
	20
	21	#include <config.h>
	22	#include <math.h>
	23	#include <glib.h>
	24	#include <glib/gstdio.h>
	25	#include "protocol.h"
	26	#include "dslogic.h"
	27
	28	/*
	29	* This should be larger than the FPGA bitstream image so that it'll get
	30	* uploaded in one big operation. There seem to be issues when uploading
	31	* it in chunks.
	32	*/
	33	#define FW_BUFSIZE (1024 * 1024)
	34
	35	#define FPGA_UPLOAD_DELAY (10 * 1000)
	36
	37	#define USB_TIMEOUT (3 * 1000)
	38
	39	SR_PRIV int dslogic_fpga_firmware_upload(const struct sr_dev_inst *sdi)
	40	{
	41	const char *name = NULL;
	42	uint64_t sum;
	43	struct sr_resource bitstream;
	44	struct drv_context *drvc;
	45	struct dev_context *devc;
	46	struct sr_usb_dev_inst *usb;
	47	unsigned char *buf;
	48	ssize_t chunksize;
	49	int transferred;
	50	int result, ret;
	51	const uint8_t cmd[3] = {0, 0, 0};
	52
	53	drvc = sdi->driver->context;
	54	devc = sdi->priv;
	55	usb = sdi->conn;
	56
	57	if (!strcmp(devc->profile->model, "DSLogic")) {
	58	if (devc->cur_threshold < 1.40)
	59	name = DSLOGIC_FPGA_FIRMWARE_3V3;
	60	else
	61	name = DSLOGIC_FPGA_FIRMWARE_5V;
	62	} else if (!strcmp(devc->profile->model, "DSLogic Pro")){
	63	name = DSLOGIC_PRO_FPGA_FIRMWARE;
	64	} else if (!strcmp(devc->profile->model, "DSLogic Plus")){
	65	name = DSLOGIC_PLUS_FPGA_FIRMWARE;
	66	} else if (!strcmp(devc->profile->model, "DSLogic Basic")){
	67	name = DSLOGIC_BASIC_FPGA_FIRMWARE;
	68	} else if (!strcmp(devc->profile->model, "DSCope")) {
	69	name = DSCOPE_FPGA_FIRMWARE;
	70	} else {
	71	sr_err("Failed to select FPGA firmware.");
	72	return SR_ERR;
	73	}
	74
	75	sr_dbg("Uploading FPGA firmware '%s'.", name);
	76
	77	result = sr_resource_open(drvc->sr_ctx, &bitstream,
	78	SR_RESOURCE_FIRMWARE, name);
	79	if (result != SR_OK)
	80	return result;
	81
	82	/* Tell the device firmware is coming. */
	83	if ((ret = libusb_control_transfer(usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR \|
	84	LIBUSB_ENDPOINT_OUT, DS_CMD_CONFIG, 0x0000, 0x0000,
	85	(unsigned char *)&cmd, sizeof(cmd), USB_TIMEOUT)) < 0) {
	86	sr_err("Failed to upload FPGA firmware: %s.", libusb_error_name(ret));
	87	sr_resource_close(drvc->sr_ctx, &bitstream);
	88	return SR_ERR;
	89	}
	90
	91	/* Give the FX2 time to get ready for FPGA firmware upload. */
	92	g_usleep(FPGA_UPLOAD_DELAY);
	93
	94	buf = g_malloc(FW_BUFSIZE);
	95	sum = 0;
	96	result = SR_OK;
	97	while (1) {
	98	chunksize = sr_resource_read(drvc->sr_ctx, &bitstream,
	99	buf, FW_BUFSIZE);
	100	if (chunksize < 0)
	101	result = SR_ERR;
	102	if (chunksize <= 0)
	103	break;
	104
	105	if ((ret = libusb_bulk_transfer(usb->devhdl, 2 \| LIBUSB_ENDPOINT_OUT,
	106	buf, chunksize, &transferred, USB_TIMEOUT)) < 0) {
	107	sr_err("Unable to configure FPGA firmware: %s.",
	108	libusb_error_name(ret));
	109	result = SR_ERR;
	110	break;
	111	}
	112	sum += transferred;
	113	sr_spew("Uploaded %" PRIu64 "/%" PRIu64 " bytes.",
	114	sum, bitstream.size);
	115
	116	if (transferred != chunksize) {
	117	sr_err("Short transfer while uploading FPGA firmware.");
	118	result = SR_ERR;
	119	break;
	120	}
	121	}
	122	g_free(buf);
	123	sr_resource_close(drvc->sr_ctx, &bitstream);
	124
	125	if (result == SR_OK)
	126	sr_dbg("FPGA firmware upload done.");
	127
	128	return result;
	129	}
	130
	131	SR_PRIV int dslogic_start_acquisition(const struct sr_dev_inst *sdi)
	132	{
	133	struct sr_usb_dev_inst *usb;
	134	struct dslogic_mode mode;
	135	int ret;
	136
	137	mode.flags = DS_START_FLAGS_MODE_LA \| DS_START_FLAGS_SAMPLE_WIDE;
	138	mode.sample_delay_h = mode.sample_delay_l = 0;
	139
	140	usb = sdi->conn;
	141	ret = libusb_control_transfer(usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR \|
	142	LIBUSB_ENDPOINT_OUT, DS_CMD_START, 0x0000, 0x0000,
	143	(unsigned char *)&mode, sizeof(mode), USB_TIMEOUT);
	144	if (ret < 0) {
	145	sr_err("Failed to send start command: %s.", libusb_error_name(ret));
	146	return SR_ERR;
	147	}
	148
	149	return SR_OK;
	150	}
	151
	152	SR_PRIV int dslogic_stop_acquisition(const struct sr_dev_inst *sdi)
	153	{
	154	struct sr_usb_dev_inst *usb;
	155	struct dslogic_mode mode;
	156	int ret;
	157
	158	mode.flags = DS_START_FLAGS_STOP;
	159	mode.sample_delay_h = mode.sample_delay_l = 0;
	160
	161	usb = sdi->conn;
	162	ret = libusb_control_transfer(usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR \|
	163	LIBUSB_ENDPOINT_OUT, DS_CMD_START, 0x0000, 0x0000,
	164	(unsigned char *)&mode, sizeof(struct dslogic_mode), USB_TIMEOUT);
	165	if (ret < 0) {
	166	sr_err("Failed to send stop command: %s.", libusb_error_name(ret));
	167	return SR_ERR;
	168	}
	169
	170	return SR_OK;
	171	}
	172
	173	/*
	174	* Get the session trigger and configure the FPGA structure
	175	* accordingly.
	176	*/
	177	static void dslogic_set_trigger(const struct sr_dev_inst *sdi,
	178	struct dslogic_fpga_config *cfg)
	179	{
	180	struct sr_trigger *trigger;
	181	struct sr_trigger_stage *stage;
	182	struct sr_trigger_match *match;
	183	struct dev_context *devc;
	184	const GSList l, m;
	185	int num_enabled_channels = 0, num_trigger_stages = 0;
	186	int channelbit, i = 0;
	187	uint32_t trigger_point;
	188
	189	devc = sdi->priv;
	190
	191	cfg->ch_en = 0;
	192	for (l = sdi->channels; l; l = l->next) {
	193	const struct sr_channel const probe = (struct sr_channel )l->data;
	194	if (probe->enabled) {
	195	num_enabled_channels++;
	196	cfg->ch_en \|= 1 << probe->index;
	197	}
	198	}
	199
	200	cfg->trig_mask0[0] = 0xffff;
	201	cfg->trig_mask1[0] = 0xffff;
	202
	203	cfg->trig_value0[0] = 0;
	204	cfg->trig_value1[0] = 0;
	205
	206	cfg->trig_edge0[0] = 0;
	207	cfg->trig_edge1[0] = 0;
	208
	209	cfg->trig_logic0[0] = 2;
	210	cfg->trig_logic1[0] = 2;
	211
	212	cfg->trig_count[0] = 0;
	213
	214	cfg->trig_glb = num_enabled_channels << 4;
	215
	216	for (i = 1; i < NUM_TRIGGER_STAGES; i++) {
	217	cfg->trig_mask0[i] = 0xffff;
	218	cfg->trig_mask1[i] = 0xffff;
	219	cfg->trig_value0[i] = 0;
	220	cfg->trig_value1[i] = 0;
	221	cfg->trig_edge0[i] = 0;
	222	cfg->trig_edge1[i] = 0;
	223	cfg->trig_logic0[i] = 2;
	224	cfg->trig_logic1[i] = 2;
	225	cfg->trig_count[i] = 0;
	226	}
	227
	228	trigger_point = (devc->capture_ratio * devc->limit_samples) / 100;
	229	if (trigger_point < DSLOGIC_ATOMIC_SAMPLES)
	230	trigger_point = DSLOGIC_ATOMIC_SAMPLES;
	231	const uint32_t mem_depth = devc->profile->mem_depth;
	232	const uint32_t max_trigger_point = devc->continuous_mode ? ((mem_depth * 10) / 100) :
	233	((mem_depth * DS_MAX_TRIG_PERCENT) / 100);
	234	if (trigger_point > max_trigger_point)
	235	trigger_point = max_trigger_point;
	236	cfg->trig_pos = trigger_point & ~(DSLOGIC_ATOMIC_SAMPLES - 1);
	237
	238	if (!(trigger = sr_session_trigger_get(sdi->session))) {
	239	sr_dbg("No session trigger found");
	240	return;
	241	}
	242
	243	for (l = trigger->stages; l; l = l->next) {
	244	stage = l->data;
	245	num_trigger_stages++;
	246	for (m = stage->matches; m; m = m->next) {
	247	match = m->data;
	248	if (!match->channel->enabled)
	249	/* Ignore disabled channels with a trigger. */
	250	continue;
	251	channelbit = 1 << (match->channel->index);
	252	/* Simple trigger support (event). */
	253	if (match->match == SR_TRIGGER_ONE) {
	254	cfg->trig_mask0[0] &= ~channelbit;
	255	cfg->trig_mask1[0] &= ~channelbit;
	256	cfg->trig_value0[0] \|= channelbit;
	257	cfg->trig_value1[0] \|= channelbit;
	258	} else if (match->match == SR_TRIGGER_ZERO) {
	259	cfg->trig_mask0[0] &= ~channelbit;
	260	cfg->trig_mask1[0] &= ~channelbit;
	261	} else if (match->match == SR_TRIGGER_FALLING) {
	262	cfg->trig_mask0[0] &= ~channelbit;
	263	cfg->trig_mask1[0] &= ~channelbit;
	264	cfg->trig_edge0[0] \|= channelbit;
	265	cfg->trig_edge1[0] \|= channelbit;
	266	} else if (match->match == SR_TRIGGER_RISING) {
	267	cfg->trig_mask0[0] &= ~channelbit;
	268	cfg->trig_mask1[0] &= ~channelbit;
	269	cfg->trig_value0[0] \|= channelbit;
	270	cfg->trig_value1[0] \|= channelbit;
	271	cfg->trig_edge0[0] \|= channelbit;
	272	cfg->trig_edge1[0] \|= channelbit;
	273	} else if (match->match == SR_TRIGGER_EDGE) {
	274	cfg->trig_edge0[0] \|= channelbit;
	275	cfg->trig_edge1[0] \|= channelbit;
	276	}
	277	}
	278	}
	279
	280	cfg->trig_glb \|= num_trigger_stages;
	281
	282	return;
	283	}
	284
	285	SR_PRIV int dslogic_fpga_configure(const struct sr_dev_inst *sdi)
	286	{
	287	struct dev_context *devc;
	288	struct sr_usb_dev_inst *usb;
	289	uint8_t c[3];
	290	struct dslogic_fpga_config cfg;
	291	uint16_t v16;
	292	uint32_t v32;
	293	int transferred, len, ret;
	294
	295	sr_dbg("Configuring FPGA.");
	296
	297	usb = sdi->conn;
	298	devc = sdi->priv;
	299
	300	WL32(&cfg.sync, DS_CFG_START);
	301	WL16(&cfg.mode_header, DS_CFG_MODE);
	302	WL16(&cfg.divider_header, DS_CFG_DIVIDER);
	303	WL16(&cfg.count_header, DS_CFG_COUNT);
	304	WL16(&cfg.trig_pos_header, DS_CFG_TRIG_POS);
	305	WL16(&cfg.trig_glb_header, DS_CFG_TRIG_GLB);
	306	WL16(&cfg.ch_en_header, DS_CFG_CH_EN);
	307	WL16(&cfg.trig_header, DS_CFG_TRIG);
	308	WL32(&cfg.end_sync, DS_CFG_END);
	309
	310	/* Pass in the length of a fixed-size struct. Really. */
	311	len = sizeof(struct dslogic_fpga_config) / 2;
	312	c[0] = len & 0xff;
	313	c[1] = (len >> 8) & 0xff;
	314	c[2] = (len >> 16) & 0xff;
	315
	316	ret = libusb_control_transfer(usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR \|
	317	LIBUSB_ENDPOINT_OUT, DS_CMD_SETTING, 0x0000, 0x0000,
	318	c, sizeof(c), USB_TIMEOUT);
	319	if (ret < 0) {
	320	sr_err("Failed to send FPGA configure command: %s.",
	321	libusb_error_name(ret));
	322	return SR_ERR;
	323	}
	324
	325	v16 = 0x0000;
	326
	327	if (devc->mode == DS_OP_INTERNAL_TEST)
	328	v16 = DS_MODE_INT_TEST;
	329	else if (devc->mode == DS_OP_EXTERNAL_TEST)
	330	v16 = DS_MODE_EXT_TEST;
	331	else if (devc->mode == DS_OP_LOOPBACK_TEST)
	332	v16 = DS_MODE_LPB_TEST;
	333
	334	if (devc->cur_samplerate == DS_MAX_LOGIC_SAMPLERATE * 2)
	335	v16 \|= DS_MODE_HALF_MODE;
	336	else if (devc->cur_samplerate == DS_MAX_LOGIC_SAMPLERATE * 4)
	337	v16 \|= DS_MODE_QUAR_MODE;
	338
	339	if (devc->continuous_mode)
	340	v16 \|= DS_MODE_STREAM_MODE;
	341	if (devc->external_clock) {
	342	v16 \|= DS_MODE_CLK_TYPE;
	343	if (devc->clock_edge == DS_EDGE_FALLING)
	344	v16 \|= DS_MODE_CLK_EDGE;
	345	}
	346	if (devc->limit_samples > DS_MAX_LOGIC_DEPTH *
	347	ceil(devc->cur_samplerate * 1.0 / DS_MAX_LOGIC_SAMPLERATE)
	348	&& !devc->continuous_mode) {
	349	/* Enable RLE for long captures.
	350	* Without this, captured data present errors.
	351	*/
	352	v16 \|= DS_MODE_RLE_MODE;
	353	}
	354
	355	WL16(&cfg.mode, v16);
	356	v32 = ceil(DS_MAX_LOGIC_SAMPLERATE * 1.0 / devc->cur_samplerate);
	357	WL32(&cfg.divider, v32);
	358
	359	/* Number of 16-sample units. */
	360	WL32(&cfg.count, devc->limit_samples / 16);
	361
	362	dslogic_set_trigger(sdi, &cfg);
	363
	364	len = sizeof(struct dslogic_fpga_config);
	365	ret = libusb_bulk_transfer(usb->devhdl, 2 \| LIBUSB_ENDPOINT_OUT,
	366	(unsigned char *)&cfg, len, &transferred, USB_TIMEOUT);
	367	if (ret < 0 \|\| transferred != len) {
	368	sr_err("Failed to send FPGA configuration: %s.", libusb_error_name(ret));
	369	return SR_ERR;
	370	}
	371
	372	return SR_OK;
	373	}
	374
	375	static int to_bytes_per_ms(struct dev_context *devc)
	376	{
	377	if (devc->cur_samplerate > SR_MHZ(100))
	378	return SR_MHZ(100) / 1000 * 2;
	379	return devc->cur_samplerate / 1000 * 2;
	380	}
	381
	382	static size_t get_buffer_size(struct dev_context *devc)
	383	{
	384	size_t s;
	385
	386	/*
	387	* The buffer should be large enough to hold 10ms of data and
	388	* a multiple of 512.
	389	*/
	390	s = 10 * to_bytes_per_ms(devc);
	391	// s = to_bytes_per_ms(devc->cur_samplerate);
	392	return (s + 511) & ~511;
	393	}
	394
	395	SR_PRIV int dslogic_get_number_of_transfers(struct dev_context *devc)
	396	{
	397	unsigned int n;
	398
	399	/* Total buffer size should be able to hold about 100ms of data. */
	400	n = (100 * to_bytes_per_ms(devc) / get_buffer_size(devc));
	401	sr_info("New calculation: %d", n);
	402
	403	if (n > NUM_SIMUL_TRANSFERS)
	404	return NUM_SIMUL_TRANSFERS;
	405
	406	return n;
	407	}