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DSView/libsigrok4DSL/session_driver.c
DreamSourceLab 856e1803a7 Improve the hardware abstraction layer
2018-07-08 17:48:18 +08:00

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/*
* This file is part of the libsigrok project.
*
* Copyright (C) 2013 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 "libsigrok.h"
#include "libsigrok-internal.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/time.h>
#include <zip.h>
#include <assert.h>
#include <string.h>
/* Message logging helpers with subsystem-specific prefix string. */
#define LOG_PREFIX "virtual-session: "
#define sr_log(l, s, args...) sr_log(l, LOG_PREFIX s, ## args)
#define sr_spew(s, args...) sr_spew(LOG_PREFIX s, ## args)
#define sr_dbg(s, args...) sr_dbg(LOG_PREFIX s, ## args)
#define sr_info(s, args...) sr_info(LOG_PREFIX s, ## args)
#define sr_warn(s, args...) sr_warn(LOG_PREFIX s, ## args)
#define sr_err(s, args...) sr_err(LOG_PREFIX s, ## args)
/* size of payloads sent across the session bus */
/** @cond PRIVATE */
#define CHUNKSIZE (512 * 1024)
#define UNITLEN 64
/** @endcond */
static uint64_t samplerates[1];
static uint64_t samplecounts[1];
static const char *maxHeights[] = {
"1X",
"2X",
"3X",
"4X",
"5X",
};
static const uint64_t vdivs[] = {
SR_mV(10),
SR_mV(20),
SR_mV(50),
SR_mV(100),
SR_mV(200),
SR_mV(500),
SR_V(1),
SR_V(2),
};
struct session_vdev {
int version;
char *sessionfile;
char *capturefile;
struct zip *archive;
struct zip_file *capfile;
void *buf;
void *logic_buf;
int bytes_read;
int cur_channel;
int cur_block;
int num_blocks;
gboolean file_opened;
uint64_t samplerate;
uint64_t total_samples;
int64_t trig_time;
uint64_t trig_pos;
int num_probes;
int enabled_probes;
uint64_t timebase;
uint8_t unit_bits;
uint8_t max_height;
struct sr_status mstatus;
};
static GSList *dev_insts = NULL;
static const int hwoptions[] = {
SR_CONF_MAX_HEIGHT,
};
static const int32_t probeOptions[] = {
SR_CONF_PROBE_MAP_UNIT,
SR_CONF_PROBE_MAP_MIN,
SR_CONF_PROBE_MAP_MAX,
};
static const char *probeMapUnits[] = {
"V",
"A",
"℃",
"℉",
"g",
"m",
"m/s",
};
static int trans_data(struct sr_dev_inst *sdi)
{
// translate for old format
struct session_vdev *vdev = sdi->priv;
GSList *l;
struct sr_channel *probe;
assert(vdev->buf != NULL);
assert(vdev->logic_buf != NULL);
assert(CHUNKSIZE % UNITLEN == 0);
//int bytes = ceil(vdev->num_probes / 8.0);
int bytes = 2;
uint8_t *src_ptr = (uint8_t *)vdev->buf;
uint64_t *dest_ptr = (uint64_t *)vdev->logic_buf;
for (int k = 0; k < CHUNKSIZE / (UNITLEN * bytes); k++) {
src_ptr = (uint8_t *)vdev->buf + (k * bytes * UNITLEN);
for (l = sdi->channels; l; l = l->next) {
probe = l->data;
if (!probe->enabled)
continue;
uint64_t mask = 1ULL << probe->index;
uint64_t result = 0;
for (int j = 0; j < UNITLEN; j++) {
if (*(uint64_t *)(src_ptr + j * bytes) & mask)
result += 1ULL << j;
}
*dest_ptr++ = result;
}
}
return SR_OK;
}
static int receive_data(int fd, int revents, const struct sr_dev_inst *cb_sdi)
{
struct sr_dev_inst *sdi;
struct session_vdev *vdev = NULL;
struct sr_datafeed_packet packet;
struct sr_datafeed_logic logic;
struct sr_datafeed_dso dso;
struct sr_datafeed_analog analog;
GSList *l;
int ret;
char file_name[32];
struct sr_channel *probe = NULL;
GSList *pl;
int channel;
(void)fd;
//(void)revents;
sr_dbg("Feed chunk.");
ret = 0;
packet.status = SR_PKT_OK;
for (l = dev_insts; l; l = l->next) {
sdi = l->data;
vdev = sdi->priv;
if (!vdev)
/* already done with this instance */
continue;
assert(vdev->unit_bits > 0);
assert(vdev->cur_channel >= 0);
if (vdev->cur_channel < vdev->num_probes) {
if (vdev->version == 1) {
ret = zip_fread(vdev->capfile, vdev->buf, CHUNKSIZE);
} else if (vdev->version == 2) {
channel = vdev->cur_channel;
pl = sdi->channels;
while (channel--)
pl = pl->next;
probe = (struct sr_channel *)pl->data;
if (!vdev->file_opened) {
char *type_name = (probe->type == SR_CHANNEL_LOGIC) ? "L" :
(probe->type == SR_CHANNEL_DSO) ? "O" :
(probe->type == SR_CHANNEL_ANALOG) ? "A" : "U";
snprintf(file_name, 31, "%s-%d/%d", type_name,
sdi->mode == LOGIC ? probe->index : 0, vdev->cur_block);
if (!(vdev->capfile = zip_fopen(vdev->archive, file_name, 0))) {
sr_err("Failed to open capture file '%s' in "
"session file '%s'.", file_name, vdev->sessionfile);
} else {
vdev->file_opened = TRUE;
}
}
if (vdev->file_opened)
ret = zip_fread(vdev->capfile, vdev->buf, CHUNKSIZE);
}
if (!vdev->file_opened) {
packet.type = SR_DF_END;
packet.status = SR_PKT_SOURCE_ERROR;
sr_session_send(cb_sdi, &packet);
sr_session_source_remove(-1);
return FALSE;
}
if (ret > 0) {
if (sdi->mode == DSO) {
packet.type = SR_DF_DSO;
packet.payload = &dso;
dso.num_samples = ret / vdev->num_probes;
dso.data = vdev->buf;
dso.probes = sdi->channels;
dso.mq = SR_MQ_VOLTAGE;
dso.unit = SR_UNIT_VOLT;
dso.mqflags = SR_MQFLAG_AC;
} else if (sdi->mode == ANALOG){
packet.type = SR_DF_ANALOG;
packet.payload = &analog;
analog.probes = sdi->channels;
analog.num_samples = ret / vdev->num_probes / ((vdev->unit_bits + 7) / 8);
analog.unit_bits = vdev->unit_bits;
analog.mq = SR_MQ_VOLTAGE;
analog.unit = SR_UNIT_VOLT;
analog.mqflags = SR_MQFLAG_AC;
analog.data = vdev->buf;
} else {
packet.type = SR_DF_LOGIC;
packet.payload = &logic;
logic.length = ret;
logic.format = (vdev->version == 2) ? LA_SPLIT_DATA : LA_CROSS_DATA;
if (probe)
logic.index = probe->index;
else
logic.index = 0;
logic.order = vdev->cur_channel;
if (vdev->version == 1) {
logic.length = ret / 16 * vdev->enabled_probes;
logic.data = vdev->logic_buf;
trans_data(sdi);
} else if (vdev->version == 2) {
logic.length = ret;
logic.data = vdev->buf;
}
}
vdev->bytes_read += ret;
sr_session_send(cb_sdi, &packet);
} else {
/* done with this capture file */
zip_fclose(vdev->capfile);
if (vdev->version == 1) {
vdev->cur_channel++;
} else if (vdev->version == 2) {
vdev->file_opened = FALSE;
vdev->cur_block++;
if (vdev->cur_block == vdev->num_blocks) {
vdev->cur_block = 0;
vdev->cur_channel++;
}
}
}
}
}
if (!vdev ||
vdev->cur_channel >= vdev->num_probes ||
revents == -1) {
packet.type = SR_DF_END;
sr_session_send(cb_sdi, &packet);
sr_session_source_remove(-1);
}
return TRUE;
}
/* driver callbacks */
static int dev_clear(void);
static int init(struct sr_context *sr_ctx)
{
(void)sr_ctx;
return SR_OK;
}
static int dev_clear(void)
{
GSList *l;
for (l = dev_insts; l; l = l->next)
sr_dev_inst_free(l->data);
g_slist_free(dev_insts);
dev_insts = NULL;
return SR_OK;
}
static int dev_open(struct sr_dev_inst *sdi)
{
if (!(sdi->priv = g_try_malloc0(sizeof(struct session_vdev)))) {
sr_err("%s: sdi->priv malloc failed", __func__);
return SR_ERR_MALLOC;
}
struct session_vdev *vdev;
vdev = sdi->priv;
if (!(vdev->buf = g_try_malloc(CHUNKSIZE + sizeof(uint64_t)))) {
sr_err("%s: vdev->buf malloc failed", __func__);
return SR_ERR_MALLOC;
}
vdev->trig_pos = 0;
vdev->trig_time = 0;
vdev->cur_block = 0;
vdev->cur_channel = 0;
vdev->file_opened = FALSE;
vdev->num_blocks = 0;
vdev->unit_bits = 1;
vdev->max_height = 0;
dev_insts = g_slist_append(dev_insts, sdi);
return SR_OK;
}
static int dev_close(struct sr_dev_inst *sdi)
{
const struct session_vdev *const vdev = sdi->priv;
g_free(vdev->sessionfile);
g_free(vdev->capturefile);
g_free(vdev->buf);
if (vdev->logic_buf)
g_free(vdev->logic_buf);
g_free(sdi->priv);
sdi->priv = NULL;
return SR_OK;
}
static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi,
const struct sr_channel *ch,
const struct sr_channel_group *cg)
{
(void)cg;
struct session_vdev *vdev;
switch (id) {
case SR_CONF_SAMPLERATE:
if (sdi) {
vdev = sdi->priv;
*data = g_variant_new_uint64(vdev->samplerate);
} else
return SR_ERR;
break;
case SR_CONF_LIMIT_SAMPLES:
if (sdi) {
vdev = sdi->priv;
*data = g_variant_new_uint64(vdev->total_samples);
} else
return SR_ERR;
break;
case SR_CONF_TRIGGER_TIME:
if (sdi) {
vdev = sdi->priv;
*data = g_variant_new_int64(vdev->trig_time);
} else
return SR_ERR;
break;
case SR_CONF_TIMEBASE:
if (sdi) {
vdev = sdi->priv;
*data = g_variant_new_uint64(vdev->timebase);
} else
return SR_ERR;
break;
case SR_CONF_MAX_TIMEBASE:
if (!sdi)
return SR_ERR;
*data = g_variant_new_uint64(MAX_TIMEBASE);
break;
case SR_CONF_UNIT_BITS:
if (sdi) {
vdev = sdi->priv;
*data = g_variant_new_byte(vdev->unit_bits);
} else
return SR_ERR;
break;
case SR_CONF_PROBE_EN:
if (sdi && ch) {
*data = g_variant_new_boolean(ch->enabled);
} else
return SR_ERR;
break;
case SR_CONF_PROBE_COUPLING:
if (sdi && ch) {
*data = g_variant_new_byte(ch->coupling);
} else
return SR_ERR;
break;
case SR_CONF_PROBE_VDIV:
if (sdi && ch) {
*data = g_variant_new_uint64(ch->vdiv);
} else
return SR_ERR;
break;
case SR_CONF_PROBE_FACTOR:
if (sdi && ch) {
*data = g_variant_new_uint64(ch->vfactor);
} else
return SR_ERR;
break;
case SR_CONF_PROBE_VPOS:
if (sdi && ch) {
*data = g_variant_new_double(ch->vpos);
} else
return SR_ERR;
break;
case SR_CONF_PROBE_MAP_UNIT:
if (!sdi || !ch)
return SR_ERR;
*data = g_variant_new_string(ch->map_unit);
break;
case SR_CONF_PROBE_MAP_MIN:
if (!sdi || !ch)
return SR_ERR;
*data = g_variant_new_double(ch->map_min);
break;
case SR_CONF_PROBE_MAP_MAX:
if (!sdi || !ch)
return SR_ERR;
*data = g_variant_new_double(ch->map_max);
break;
case SR_CONF_TRIGGER_VALUE:
if (sdi && ch) {
*data = g_variant_new_byte(ch->trig_value);
} else
return SR_ERR;
break;
case SR_CONF_MAX_DSO_SAMPLERATE:
if (!sdi)
return SR_ERR;
vdev = sdi->priv;
*data = g_variant_new_uint64(vdev->samplerate);
break;
case SR_CONF_MAX_DSO_SAMPLELIMITS:
if (!sdi)
return SR_ERR;
vdev = sdi->priv;
*data = g_variant_new_uint64(vdev->total_samples);
break;
case SR_CONF_HW_DEPTH:
if (!sdi)
return SR_ERR;
vdev = sdi->priv;
*data = g_variant_new_uint64(vdev->total_samples);
break;
case SR_CONF_MAX_HEIGHT:
if (!sdi)
return SR_ERR;
vdev = sdi->priv;
*data = g_variant_new_string(maxHeights[vdev->max_height]);
break;
case SR_CONF_MAX_HEIGHT_VALUE:
if (!sdi)
return SR_ERR;
vdev = sdi->priv;
*data = g_variant_new_byte(vdev->max_height);
break;
case SR_CONF_VLD_CH_NUM:
if (!sdi)
return SR_ERR;
vdev = sdi->priv;
*data = g_variant_new_int16(vdev->num_probes);
break;
case SR_CONF_FILE_VERSION:
if (!sdi)
return SR_ERR;
vdev = sdi->priv;
*data = g_variant_new_int16(vdev->version);
break;
default:
return SR_ERR_ARG;
}
return SR_OK;
}
static int config_set(int id, GVariant *data, struct sr_dev_inst *sdi,
struct sr_channel *ch,
struct sr_channel_group *cg)
{
(void)cg;
struct session_vdev *vdev;
const char *stropt;
unsigned int i;
vdev = sdi->priv;
switch (id) {
case SR_CONF_SAMPLERATE:
vdev->samplerate = g_variant_get_uint64(data);
samplerates[0] = vdev->samplerate;
sr_info("Setting samplerate to %" PRIu64 ".", vdev->samplerate);
break;
case SR_CONF_TIMEBASE:
vdev->timebase = g_variant_get_uint64(data);
sr_info("Setting timebase to %" PRIu64 ".", vdev->timebase);
break;
case SR_CONF_UNIT_BITS:
vdev->unit_bits = g_variant_get_byte(data);
sr_info("Setting unit bits to %d.", vdev->unit_bits);
break;
case SR_CONF_SESSIONFILE:
vdev->sessionfile = g_strdup(g_variant_get_bytestring(data));
sr_info("Setting sessionfile to '%s'.", vdev->sessionfile);
break;
case SR_CONF_CAPTUREFILE:
vdev->capturefile = g_strdup(g_variant_get_bytestring(data));
sr_info("Setting capturefile to '%s'.", vdev->capturefile);
break;
case SR_CONF_FILE_VERSION:
vdev->version = g_variant_get_int16(data);
sr_info("Setting file version to '%d'.", vdev->version);
break;
case SR_CONF_LIMIT_SAMPLES:
vdev->total_samples = g_variant_get_uint64(data);
samplecounts[0] = vdev->total_samples;
sr_info("Setting limit samples to %" PRIu64 ".", vdev->total_samples);
break;
case SR_CONF_TRIGGER_TIME:
vdev->trig_time = g_variant_get_int64(data);
sr_info("Setting trigger time to %" PRId64 ".", vdev->trig_time);
break;
case SR_CONF_TRIGGER_POS:
vdev->trig_pos = g_variant_get_uint64(data);
sr_info("Setting trigger position to %" PRIu64 ".", vdev->trig_pos);
break;
case SR_CONF_NUM_BLOCKS:
vdev->num_blocks = g_variant_get_uint64(data);
sr_info("Setting block number to %" PRIu64 ".", vdev->num_blocks);
break;
case SR_CONF_CAPTURE_NUM_PROBES:
vdev->num_probes = g_variant_get_uint64(data);
if (sdi->mode == LOGIC) {
if (!(vdev->logic_buf = g_try_malloc(CHUNKSIZE/16*vdev->num_probes))) {
sr_err("%s: vdev->logic_buf malloc failed", __func__);
}
}
break;
case SR_CONF_PROBE_EN:
ch->enabled = g_variant_get_boolean(data);
break;
case SR_CONF_PROBE_COUPLING:
ch->coupling = g_variant_get_byte(data);
break;
case SR_CONF_PROBE_VDIV:
ch->vdiv = g_variant_get_uint64(data);
break;
case SR_CONF_PROBE_FACTOR:
ch->vfactor = g_variant_get_uint64(data);
break;
case SR_CONF_PROBE_VPOS:
ch->vpos = g_variant_get_double(data);
break;
case SR_CONF_PROBE_MAP_UNIT:
ch->map_unit = g_variant_get_string(data, NULL);
break;
case SR_CONF_PROBE_MAP_MIN:
ch->map_min = g_variant_get_double(data);
break;
case SR_CONF_PROBE_MAP_MAX:
ch->map_max = g_variant_get_double(data);
break;
case SR_CONF_TRIGGER_VALUE:
ch->trig_value = g_variant_get_byte(data);
break;
case SR_CONF_STATUS_PERIOD:
if (ch->index == 0)
vdev->mstatus.ch0_period = g_variant_get_uint64(data);
else
vdev->mstatus.ch1_period = g_variant_get_uint64(data);
break;
case SR_CONF_STATUS_PCNT:
if (ch->index == 0)
vdev->mstatus.ch0_pcnt = g_variant_get_uint64(data);
else
vdev->mstatus.ch1_pcnt = g_variant_get_uint64(data);
break;
case SR_CONF_STATUS_MAX:
if (ch->index == 0)
vdev->mstatus.ch0_max = g_variant_get_uint64(data);
else
vdev->mstatus.ch1_max = g_variant_get_uint64(data);
break;
case SR_CONF_STATUS_MIN:
if (ch->index == 0)
vdev->mstatus.ch0_min = g_variant_get_uint64(data);
else
vdev->mstatus.ch1_min = g_variant_get_uint64(data);
break;
case SR_CONF_MAX_HEIGHT:
stropt = g_variant_get_string(data, NULL);
for (i = 0; i < ARRAY_SIZE(maxHeights); i++) {
if (!strcmp(stropt, maxHeights[i])) {
vdev->max_height = i;
break;
}
}
sr_dbg("%s: setting Signal Max Height to %d",
__func__, vdev->max_height);
break;
default:
sr_err("Unknown capability: %d.", id);
return SR_ERR;
}
return SR_OK;
}
static int config_list(int key, GVariant **data,
const struct sr_dev_inst *sdi,
const struct sr_channel_group *cg)
{
(void)cg;
GVariant *gvar;
GVariantBuilder gvb;
(void)sdi;
switch (key) {
case SR_CONF_DEVICE_OPTIONS:
// *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
// hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
*data = g_variant_new_from_data(G_VARIANT_TYPE("ai"),
hwoptions, ARRAY_SIZE(hwoptions)*sizeof(int32_t), TRUE, NULL, NULL);
break;
case SR_CONF_SAMPLERATE:
g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
// gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), samplerates,
// ARRAY_SIZE(samplerates), sizeof(uint64_t));
gvar = g_variant_new_from_data(G_VARIANT_TYPE("at"),
samplerates, ARRAY_SIZE(samplerates)*sizeof(uint64_t), TRUE, NULL, NULL);
g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
*data = g_variant_builder_end(&gvb);
break;
case SR_CONF_LIMIT_SAMPLES:
g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
gvar = g_variant_new_from_data(G_VARIANT_TYPE("at"),
samplecounts, ARRAY_SIZE(samplecounts)*sizeof(uint64_t), TRUE, NULL, NULL);
g_variant_builder_add(&gvb, "{sv}", "samplecounts", gvar);
*data = g_variant_builder_end(&gvb);
break;
case SR_CONF_MAX_HEIGHT:
*data = g_variant_new_strv(maxHeights, ARRAY_SIZE(maxHeights));
break;
case SR_CONF_PROBE_CONFIGS:
*data = g_variant_new_from_data(G_VARIANT_TYPE("ai"),
probeOptions, ARRAY_SIZE(probeOptions)*sizeof(int32_t), TRUE, NULL, NULL);
break;
case SR_CONF_PROBE_VDIV:
g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
gvar = g_variant_new_from_data(G_VARIANT_TYPE("at"),
vdivs, ARRAY_SIZE(vdivs)*sizeof(uint64_t), TRUE, NULL, NULL);
g_variant_builder_add(&gvb, "{sv}", "vdivs", gvar);
*data = g_variant_builder_end(&gvb);
break;
case SR_CONF_PROBE_MAP_UNIT:
*data = g_variant_new_strv(probeMapUnits, ARRAY_SIZE(probeMapUnits));
break;
default:
return SR_ERR_ARG;
}
return SR_OK;
}
static int dev_status_get(const struct sr_dev_inst *sdi, struct sr_status *status, gboolean prg, int begin, int end)
{
(void)prg;
(void)begin;
(void)end;
struct session_vdev *vdev;
if (sdi) {
vdev = sdi->priv;
*status = vdev->mstatus;
return SR_OK;
} else {
return SR_ERR;
}
}
static int dev_acquisition_start(struct sr_dev_inst *sdi,
void *cb_data)
{
(void)cb_data;
struct zip_stat zs;
struct session_vdev *vdev;
struct sr_datafeed_packet packet;
int ret;
GSList *l;
struct sr_channel *probe;
vdev = sdi->priv;
vdev->enabled_probes = 0;
packet.status = SR_PKT_OK;
sr_info("Opening archive %s file %s", vdev->sessionfile,
vdev->capturefile);
if (!(vdev->archive = zip_open(vdev->sessionfile, 0, &ret))) {
sr_err("Failed to open session file '%s': "
"zip error %d\n", vdev->sessionfile, ret);
return SR_ERR;
}
if (vdev->version == 1) {
if (zip_stat(vdev->archive, vdev->capturefile, 0, &zs) == -1) {
sr_err("Failed to check capture file '%s' in "
"session file '%s'.", vdev->capturefile, vdev->sessionfile);
return SR_ERR;
}
if (!(vdev->capfile = zip_fopen(vdev->archive, vdev->capturefile, 0))) {
sr_err("Failed to open capture file '%s' in "
"session file '%s'.", vdev->capturefile, vdev->sessionfile);
return SR_ERR;
}
vdev->file_opened = TRUE;
vdev->cur_channel = vdev->num_probes - 1;
} else {
if (sdi->mode == LOGIC)
vdev->cur_channel = 0;
else
vdev->cur_channel = vdev->num_probes - 1;
}
for (l = sdi->channels; l; l = l->next) {
probe = l->data;
if (probe->enabled)
vdev->enabled_probes++;
}
/* Send header packet to the session bus. */
std_session_send_df_header(sdi, LOG_PREFIX);
/* Send trigger packet to the session bus */
if (vdev->trig_pos != 0) {
struct ds_trigger_pos session_trigger;
if (sdi->mode == DSO)
session_trigger.real_pos = vdev->trig_pos * vdev->enabled_probes / vdev->num_probes;
else
session_trigger.real_pos = vdev->trig_pos;
packet.type = SR_DF_TRIGGER;
packet.payload = &session_trigger;
sr_session_send(sdi, &packet);
}
/* freewheeling source */
sr_session_source_add(-1, 0, 0, receive_data, sdi);
return SR_OK;
}
/** @private */
SR_PRIV struct sr_dev_driver session_driver = {
.name = "virtual-session",
.longname = "Session-emulating driver",
.api_version = 1,
.init = init,
.cleanup = dev_clear,
.scan = NULL,
.dev_list = NULL,
.dev_mode_list = NULL,
.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_status_get = dev_status_get,
.dev_acquisition_start = dev_acquisition_start,
.dev_acquisition_stop = NULL,
.priv = NULL,
};
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