[libsigrok.git] / src / hardware / hung-chang-dso-2100 / api.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2015 Daniel Glöckner <daniel-gl@gmx.net>
 *
 * 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 <ieee1284.h>
#include <string.h>
#include "protocol.h"

static const uint32_t scanopts[] = {
	SR_CONF_CONN,
};

static const uint32_t drvopts[] = {
	SR_CONF_OSCILLOSCOPE,
};

static const uint32_t devopts[] = {
	SR_CONF_CONN | SR_CONF_GET,
	SR_CONF_LIMIT_FRAMES | SR_CONF_GET | SR_CONF_SET,
	SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
	SR_CONF_TRIGGER_SOURCE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
	SR_CONF_TRIGGER_SLOPE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
	SR_CONF_BUFFERSIZE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
};

static const uint32_t cgopts[] = {
	SR_CONF_VDIV | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
	SR_CONF_COUPLING | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
	SR_CONF_PROBE_FACTOR | SR_CONF_GET | SR_CONF_SET,
};

static const uint64_t samplerates[] = {
	SR_MHZ(100), SR_MHZ(50),  SR_MHZ(25),   SR_MHZ(20),
	SR_MHZ(10),  SR_MHZ(5),   SR_KHZ(2500), SR_MHZ(2),
	SR_MHZ(1),   SR_KHZ(500), SR_KHZ(250),  SR_KHZ(200),
	SR_KHZ(100), SR_KHZ(50),  SR_KHZ(25),   SR_KHZ(20),
	SR_KHZ(10),  SR_KHZ(5),   SR_HZ(2500),  SR_KHZ(2),
	SR_KHZ(1),   SR_HZ(500),  SR_HZ(250),   SR_HZ(200),
	SR_HZ(100),  SR_HZ(50),   SR_HZ(25),    SR_HZ(20)
};

/* must be in sync with readout_steps[] in protocol.c */
static const uint64_t buffersizes[] = {
	2 * 500, 3 * 500, 4 * 500, 5 * 500,
	6 * 500, 7 * 500, 8 * 500, 9 * 500, 10 * 500,
	12 * 500 - 2, 14 * 500 - 2, 16 * 500 - 2,
	18 * 500 - 2, 20 * 500 - 2, 10240 - 2
};

static const uint64_t vdivs[][2] = {
	{ 10, 1000 },
	{ 20, 1000 },
	{ 50, 1000 },
	{ 100, 1000 },
	{ 200, 1000 },
	{ 500, 1000 },
	{ 1, 1 },
	{ 2, 1 },
	{ 5, 1 },
};

/* Bits 4 and 5 enable relays that add /10 filters to the chain
 * Bits 0 and 1 select an output from a resistor array */
static const uint8_t vdivs_map[] = {
	0x01, 0x02, 0x03, 0x21, 0x22, 0x23, 0x31, 0x32, 0x33
};


static const char *trigger_sources[] = {
	"A", "B", "EXT"
};

static const uint8_t trigger_sources_map[] = {
	0x00, 0x80, 0x40
};

static const char *trigger_slopes[] = {
	"f", "r"
};

static const char *coupling[] = {
	"DC", "AC", "GND"
};

static const uint8_t coupling_map[] = {
	0x00, 0x08, 0x04
};

static GSList *scan_port(GSList *devices, struct parport *port)
{
	struct sr_dev_inst *sdi;
	struct sr_channel *ch;
	struct sr_channel_group *cg;
	struct dev_context *devc;
	int i;

	if (ieee1284_open(port, 0, &i) != E1284_OK) {
		sr_err("Can't open parallel port %s", port->name);
		goto fail1;
	}

	if ((i & (CAP1284_RAW | CAP1284_BYTE)) != (CAP1284_RAW | CAP1284_BYTE)) {
		sr_err("Parallel port %s does not provide low-level bidirection access",
		       port->name);
		goto fail2;
	}

	if (ieee1284_claim(port) != E1284_OK) {
		sr_err("Parallel port %s already in use", port->name);
		goto fail2;
	}

	if (!hung_chang_dso_2100_check_id(port))
		goto fail3;

	sdi = g_malloc0(sizeof(struct sr_dev_inst));
	sdi->status = SR_ST_INACTIVE;
	sdi->vendor = g_strdup("Hung-Chang");
	sdi->model = g_strdup("DSO-2100");
	sdi->inst_type = 0; /* FIXME */
	sdi->conn = port;
	ieee1284_ref(port);

	for (i = 0; i < NUM_CHANNELS; i++) {
		cg = g_malloc0(sizeof(struct sr_channel_group));
		cg->name = g_strdup(trigger_sources[i]);
		ch = sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, FALSE, trigger_sources[i]);
		cg->channels = g_slist_append(cg->channels, ch);
		sdi->channel_groups = g_slist_append(sdi->channel_groups, cg);
	}

	devc = g_malloc0(sizeof(struct dev_context));
	devc->enabled_channel = g_slist_append(NULL, NULL);
	devc->channel = 0;
	devc->rate = 0;
	devc->probe[0] = 10;
	devc->probe[1] = 10;
	devc->cctl[0] = 0x31; /* 1V/div, DC coupling, trigger on channel A*/
	devc->cctl[1] = 0x31; /* 1V/div, DC coupling, no tv sync trigger */
	devc->edge = 0;
	devc->tlevel = 0x80;
	devc->pos[0] = 0x80;
	devc->pos[1] = 0x80;
	devc->offset[0] = 0x80;
	devc->offset[1] = 0x80;
	devc->gain[0] = 0x80;
	devc->gain[1] = 0x80;
	devc->frame_limit = 0;
	devc->last_step = 0; /* buffersize = 1000 */
	sdi->priv = devc;

	devices = g_slist_append(devices, sdi);

fail3:
	ieee1284_release(port);
fail2:
	ieee1284_close(port);
fail1:
	return devices;
}

static GSList *scan(struct sr_dev_driver *di, GSList *options)
{
	struct parport_list ports;
	struct sr_config *src;
	const char *conn = NULL;
	GSList *devices, *option;
	gboolean port_found;
	int i;


	for (option = options; option; option = option->next) {
		src = option->data;
		if (src->key == SR_CONF_CONN) {
			conn = g_variant_get_string(src->data, NULL);
			break;
		}
	}

	if (!conn)
		return NULL;

	if (ieee1284_find_ports(&ports, 0) != E1284_OK)
		return NULL;

	devices = NULL;
	port_found = FALSE;
	for (i = 0; i < ports.portc; i++)
		if (!strcmp(ports.portv[i]->name, conn)) {
			port_found = TRUE;
			devices = scan_port(devices, ports.portv[i]);
		}

	if (!port_found) {
		sr_err("Parallel port %s not found. Valid names are:", conn);
		for (i = 0; i < ports.portc; i++)
			sr_err("\t%s", ports.portv[i]->name);
	}

	ieee1284_free_ports(&ports);

	return std_scan_complete(di, devices);
}

static void clear_private(void *priv)
{
	struct dev_context *devc = priv;

	g_slist_free(devc->enabled_channel);
}

static int dev_clear(const struct sr_dev_driver *di)
{
	struct drv_context *drvc = di->context;
	struct sr_dev_inst *sdi;
	GSList *l;

	if (drvc) {
		for (l = drvc->instances; l; l = l->next) {
			sdi = l->data;
			ieee1284_unref(sdi->conn);
		}
	}

	return std_dev_clear(di, clear_private);
}

static int dev_open(struct sr_dev_inst *sdi)
{
	struct dev_context *devc = sdi->priv;
	int i;

	if (ieee1284_open(sdi->conn, 0, &i) != E1284_OK)
		goto fail1;

	if (ieee1284_claim(sdi->conn) != E1284_OK)
		goto fail2;

	if (ieee1284_data_dir(sdi->conn, 1) != E1284_OK)
		goto fail3;

	if (hung_chang_dso_2100_move_to(sdi, 1))
		goto fail3;

	devc->samples = g_try_malloc(1000 * sizeof(*devc->samples));
	if (!devc->samples)
		goto fail3;

	return SR_OK;

fail3:
	hung_chang_dso_2100_reset_port(sdi->conn);
	ieee1284_release(sdi->conn);
fail2:
	ieee1284_close(sdi->conn);
fail1:
	return SR_ERR;
}

static int dev_close(struct sr_dev_inst *sdi)
{
	struct dev_context *devc = sdi->priv;

	g_free(devc->samples);
	hung_chang_dso_2100_reset_port(sdi->conn);
	ieee1284_release(sdi->conn);
	ieee1284_close(sdi->conn);

	sdi->status = SR_ST_INACTIVE;

	return SR_OK;
}

static int find_in_array(GVariant *data, const GVariantType *type,
			 const void *arr, int n)
{
	const char * const *sarr;
	const char *s;
	const uint64_t *u64arr;
	const uint8_t *u8arr;
	uint64_t u64;
	uint8_t u8;
	int i;

	if (!g_variant_is_of_type(data, type))
		return -1;

	switch (g_variant_classify(data)) {
	case G_VARIANT_CLASS_STRING:
		s = g_variant_get_string(data, NULL);
		sarr = arr;

		for (i = 0; i < n; i++)
			if (!strcmp(s, sarr[i]))
				return i;
		break;
	case G_VARIANT_CLASS_UINT64:
		u64 = g_variant_get_uint64(data);
		u64arr = arr;

		for (i = 0; i < n; i++)
			if (u64 == u64arr[i])
				return i;
		break;
	case G_VARIANT_CLASS_BYTE:
		u8 = g_variant_get_byte(data);
		u8arr = arr;

		for (i = 0; i < n; i++)
			if (u8 == u8arr[i])
				return i;
	default:
		break;
	}

	return -1;
}

static int reverse_map(uint8_t u, const uint8_t *arr, int n)
{
	GVariant *v = g_variant_new_byte(u);
	int i = find_in_array(v, G_VARIANT_TYPE_BYTE, arr, n);
	g_variant_unref(v);
	return i;
}

static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
		const struct sr_channel_group *cg)
{
	struct dev_context *devc = sdi->priv;
	struct parport *port;
	int ret, i, ch = -1;

	if (cg) /* sr_config_get will validate cg using config_list */
		ch = ((struct sr_channel *)cg->channels->data)->index;

	ret = SR_OK;
	switch (key) {
	case SR_CONF_CONN:
		port = sdi->conn;
		*data = g_variant_new_string(port->name);
		break;
	case SR_CONF_LIMIT_FRAMES:
		*data = g_variant_new_uint64(devc->frame_limit);
		break;
	case SR_CONF_SAMPLERATE:
		*data = g_variant_new_uint64(samplerates[devc->rate]);
		break;
	case SR_CONF_TRIGGER_SOURCE:
		i = reverse_map(devc->cctl[0] & 0xC0, trigger_sources_map,
				ARRAY_SIZE(trigger_sources_map));
		if (i == -1)
			ret = SR_ERR;
		else
			*data = g_variant_new_string(trigger_sources[i]);
		break;
	case SR_CONF_TRIGGER_SLOPE:
		if (devc->edge >= ARRAY_SIZE(trigger_slopes))
			ret = SR_ERR;
		else
			*data = g_variant_new_string(trigger_slopes[devc->edge]);
		break;
	case SR_CONF_BUFFERSIZE:
		*data = g_variant_new_uint64(buffersizes[devc->last_step]);
		break;
	case SR_CONF_VDIV:
		if (ch == -1) {
			ret = SR_ERR_CHANNEL_GROUP;
		} else {
			i = reverse_map(devc->cctl[ch] & 0x33, vdivs_map,
					ARRAY_SIZE(vdivs_map));
			if (i == -1)
				ret = SR_ERR;
			else
				*data = g_variant_new("(tt)", vdivs[i][0],
						      vdivs[i][1]);
		}
		break;
	case SR_CONF_COUPLING:
		if (ch == -1) {
			ret = SR_ERR_CHANNEL_GROUP;
		} else {
			i = reverse_map(devc->cctl[ch] & 0x0C, coupling_map,
					ARRAY_SIZE(coupling_map));
			if (i == -1)
				ret = SR_ERR;
			else
				*data = g_variant_new_string(coupling[i]);
		}
		break;
	case SR_CONF_PROBE_FACTOR:
		if (ch == -1)
			ret = SR_ERR_CHANNEL_GROUP;
		else
			*data = g_variant_new_uint64(devc->probe[ch]);
		break;
	default:
		ret = SR_ERR_NA;
	}

	return ret;
}

static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
		const struct sr_channel_group *cg)
{
	struct dev_context *devc = sdi->priv;
	int ret, i, ch = -1;
	uint64_t u, v;

	if (cg) /* sr_config_set will validate cg using config_list */
		ch = ((struct sr_channel *)cg->channels->data)->index;

	ret = SR_OK;
	switch (key) {
	case SR_CONF_LIMIT_FRAMES:
		devc->frame_limit = g_variant_get_uint64(data);
		break;
	case SR_CONF_SAMPLERATE:
		i = find_in_array(data, G_VARIANT_TYPE_UINT64,
				  samplerates, ARRAY_SIZE(samplerates));
		if (i == -1)
			ret = SR_ERR_ARG;
		else
			devc->rate = i;
		break;
	case SR_CONF_TRIGGER_SOURCE:
		i = find_in_array(data, G_VARIANT_TYPE_STRING,
				  trigger_sources, ARRAY_SIZE(trigger_sources));
		if (i == -1)
			ret = SR_ERR_ARG;
		else
			devc->cctl[0] = (devc->cctl[0] & 0x3F)
				      | trigger_sources_map[i];
		break;
	case SR_CONF_TRIGGER_SLOPE:
		i = find_in_array(data, G_VARIANT_TYPE_STRING,
				  trigger_slopes, ARRAY_SIZE(trigger_slopes));
		if (i == -1)
			ret = SR_ERR_ARG;
		else
			devc->edge = i;
		break;
	case SR_CONF_BUFFERSIZE:
		i = find_in_array(data, G_VARIANT_TYPE_UINT64,
				  buffersizes, ARRAY_SIZE(buffersizes));
		if (i == -1)
			ret = SR_ERR_ARG;
		else
			devc->last_step = i;
		break;
	case SR_CONF_VDIV:
		if (ch == -1) {
			ret = SR_ERR_CHANNEL_GROUP;
		} else if (!g_variant_is_of_type(data, G_VARIANT_TYPE("(tt)"))) {
			ret = SR_ERR_ARG;
		} else {
			g_variant_get(data, "(tt)", &u, &v);
			for (i = 0; i < (int)ARRAY_SIZE(vdivs); i++)
				if (vdivs[i][0] == u && vdivs[i][1] == v)
					break;
			if (i == ARRAY_SIZE(vdivs))
				ret = SR_ERR_ARG;
			else
				devc->cctl[ch] = (devc->cctl[ch] & 0xCC)
					       | vdivs_map[i];
		}
		break;
	case SR_CONF_COUPLING:
		if (ch == -1) {
			ret = SR_ERR_CHANNEL_GROUP;
		} else {
			i = find_in_array(data, G_VARIANT_TYPE_STRING,
					  coupling, ARRAY_SIZE(coupling));
			if (i == -1)
				ret = SR_ERR_ARG;
			else
				devc->cctl[ch] = (devc->cctl[ch] & 0xF3)
					       | coupling_map[i];
		}
		break;
	case SR_CONF_PROBE_FACTOR:
		if (ch == -1) {
			ret = SR_ERR_CHANNEL_GROUP;
		} else {
			u = g_variant_get_uint64(data);
			if (!u)
				ret = SR_ERR_ARG;
			else
				devc->probe[ch] = u;
		}
		break;
	default:
		ret = SR_ERR_NA;
	}

	return ret;
}

static int config_channel_set(const struct sr_dev_inst *sdi,
			      struct sr_channel *ch,
			      unsigned int changes)
{
	struct dev_context *devc = sdi->priv;
	uint8_t v;

	if (changes & SR_CHANNEL_SET_ENABLED) {
		if (ch->enabled) {
			v = devc->channel | (1 << ch->index);
			if (v & (v - 1))
				return SR_ERR;
			devc->channel = v;
			devc->enabled_channel->data = ch;
		} else {
			devc->channel &= ~(1 << ch->index);
		}
	}
	return SR_OK;
}

static int config_commit(const struct sr_dev_inst *sdi)
{
	uint8_t state = hung_chang_dso_2100_read_mbox(sdi->conn, 0.02);
	int ret;

	switch (state) {
	case 0x03:
	case 0x14:
	case 0x21:
		/* we will travel the complete config path on our way to state 1 */
		break;
	case 0x00:
		state = 0x01;
		/* Fallthrough */
	default:
		ret = hung_chang_dso_2100_move_to(sdi, 1);
		if (ret != SR_OK)
			return ret;
		/* Fallthrough */
	case 0x01:
		hung_chang_dso_2100_write_mbox(sdi->conn, 4);
	}
	ret = hung_chang_dso_2100_move_to(sdi, 1);
	if (ret != SR_OK)
		return ret;
	return hung_chang_dso_2100_move_to(sdi, state);
}

static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
		const struct sr_channel_group *cg)
{
	GVariantBuilder gvb;
	GVariant *gvar, *rational[2];
	GSList *l;
	int i;

	switch (key) {
		case SR_CONF_SCAN_OPTIONS:
	case SR_CONF_DEVICE_OPTIONS:
		break;
	case SR_CONF_SAMPLERATE:
	case SR_CONF_TRIGGER_SOURCE:
	case SR_CONF_TRIGGER_SLOPE:
	case SR_CONF_BUFFERSIZE:
		if (!sdi || cg)
			return SR_ERR_NA;
		break;
	case SR_CONF_VDIV:
	case SR_CONF_COUPLING:
		if (!sdi)
			return SR_ERR_NA;
		if (!cg)
			return SR_ERR_CHANNEL_GROUP;
		l = g_slist_find(sdi->channel_groups, cg);
		if (!l)
			return SR_ERR_ARG;
		break;
	default:
		return SR_ERR_NA;
	}

	switch (key) {
	case SR_CONF_SCAN_OPTIONS:
		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
				scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
		break;
	case SR_CONF_DEVICE_OPTIONS:
		if (!sdi)
			*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
					drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
		else if (!cg)
			*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
					devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
		else
			*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
					cgopts, ARRAY_SIZE(cgopts), sizeof(uint32_t));
		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));
		g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
		*data = g_variant_builder_end(&gvb);
		break;
	case SR_CONF_TRIGGER_SOURCE:
		*data = g_variant_new_strv(trigger_sources, ARRAY_SIZE(trigger_sources));
		break;
	case SR_CONF_TRIGGER_SLOPE:
		*data = g_variant_new_strv(trigger_slopes, ARRAY_SIZE(trigger_slopes));
		break;
	case SR_CONF_BUFFERSIZE:
		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT64,
				buffersizes, ARRAY_SIZE(buffersizes), sizeof(uint64_t));
		break;
	case SR_CONF_VDIV:
		g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
		for (i = 0; i < (int)ARRAY_SIZE(vdivs); i++) {
			rational[0] = g_variant_new_uint64(vdivs[i][0]);
			rational[1] = g_variant_new_uint64(vdivs[i][1]);
			gvar = g_variant_new_tuple(rational, 2);
			g_variant_builder_add_value(&gvb, gvar);
		}
		*data = g_variant_builder_end(&gvb);
		break;
	case SR_CONF_COUPLING:
		*data = g_variant_new_strv(coupling, ARRAY_SIZE(coupling));
		break;
	}

	return SR_OK;
}

static int dev_acquisition_start(const struct sr_dev_inst *sdi)
{
	struct dev_context *devc = sdi->priv;
	int ret;

	if (devc->channel) {
		static const float res_array[] = {0.5, 1, 2, 5};
		static const uint8_t relays[] = {100, 10, 10, 1};
		devc->factor = devc->probe[devc->channel - 1] / 32.0;
		devc->factor *= res_array[devc->cctl[devc->channel - 1] & 0x03];
		devc->factor /= relays[(devc->cctl[devc->channel - 1] >> 4) & 0x03];
	}
	devc->frame = 0;
	devc->state_known = TRUE;
	devc->step = 0;
	devc->adc2 = FALSE;
	devc->retries = MAX_RETRIES;

	ret = hung_chang_dso_2100_move_to(sdi, 0x21);
	if (ret != SR_OK)
		return ret;

	std_session_send_df_header(sdi);

	sr_session_source_add(sdi->session, -1, 0, 8,
			      hung_chang_dso_2100_poll, (void *)sdi);

	return SR_OK;
}

static int dev_acquisition_stop(struct sr_dev_inst *sdi)
{
	std_session_send_df_end(sdi);
	sr_session_source_remove(sdi->session, -1);
	hung_chang_dso_2100_move_to(sdi, 1);

	return SR_OK;
}

static struct sr_dev_driver hung_chang_dso_2100_driver_info = {
	.name = "hung-chang-dso-2100",
	.longname = "Hung-Chang DSO-2100",
	.api_version = 1,
	.init = std_init,
	.cleanup = std_cleanup,
	.scan = scan,
	.dev_list = std_dev_list,
	.dev_clear = dev_clear,
	.config_get = config_get,
	.config_set = config_set,
	.config_channel_set = config_channel_set,
	.config_commit = config_commit,
	.config_list = config_list,
	.dev_open = dev_open,
	.dev_close = dev_close,
	.dev_acquisition_start = dev_acquisition_start,
	.dev_acquisition_stop = dev_acquisition_stop,
	.context = NULL,
};
SR_REGISTER_DEV_DRIVER(hung_chang_dso_2100_driver_info);
Commit	Line	Data
05ac4a98 DG	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2015 Daniel Glöckner <daniel-gl@gmx.net>
	5	*
	6	* This program is free software: you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation, either version 3 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	18	*/
	19
6ec6c43b	20	#include <config.h>
c9404469 DG	21	#include <ieee1284.h>
c9404469 DG	22	#include <string.h>
05ac4a98 DG	23	#include "protocol.h"
05ac4a98 DG	24
c9404469 DG	25	static const uint32_t scanopts[] = {
	26	SR_CONF_CONN,
	27	};
	28
	29	static const uint32_t drvopts[] = {
	30	SR_CONF_OSCILLOSCOPE,
	31	};
	32
	33	static const uint32_t devopts[] = {
	34	SR_CONF_CONN \| SR_CONF_GET,
	35	SR_CONF_LIMIT_FRAMES \| SR_CONF_GET \| SR_CONF_SET,
	36	SR_CONF_SAMPLERATE \| SR_CONF_GET \| SR_CONF_SET \| SR_CONF_LIST,
	37	SR_CONF_TRIGGER_SOURCE \| SR_CONF_GET \| SR_CONF_SET \| SR_CONF_LIST,
	38	SR_CONF_TRIGGER_SLOPE \| SR_CONF_GET \| SR_CONF_SET \| SR_CONF_LIST,
	39	SR_CONF_BUFFERSIZE \| SR_CONF_GET \| SR_CONF_SET \| SR_CONF_LIST,
	40	};
	41
	42	static const uint32_t cgopts[] = {
	43	SR_CONF_VDIV \| SR_CONF_GET \| SR_CONF_SET \| SR_CONF_LIST,
	44	SR_CONF_COUPLING \| SR_CONF_GET \| SR_CONF_SET \| SR_CONF_LIST,
	45	SR_CONF_PROBE_FACTOR \| SR_CONF_GET \| SR_CONF_SET,
	46	};
	47
	48	static const uint64_t samplerates[] = {
	49	SR_MHZ(100), SR_MHZ(50), SR_MHZ(25), SR_MHZ(20),
	50	SR_MHZ(10), SR_MHZ(5), SR_KHZ(2500), SR_MHZ(2),
	51	SR_MHZ(1), SR_KHZ(500), SR_KHZ(250), SR_KHZ(200),
	52	SR_KHZ(100), SR_KHZ(50), SR_KHZ(25), SR_KHZ(20),
	53	SR_KHZ(10), SR_KHZ(5), SR_HZ(2500), SR_KHZ(2),
	54	SR_KHZ(1), SR_HZ(500), SR_HZ(250), SR_HZ(200),
	55	SR_HZ(100), SR_HZ(50), SR_HZ(25), SR_HZ(20)
	56	};
	57
	58	/* must be in sync with readout_steps[] in protocol.c */
	59	static const uint64_t buffersizes[] = {
	60	2 * 500, 3 * 500, 4 * 500, 5 * 500,
	61	6 * 500, 7 * 500, 8 * 500, 9 * 500, 10 * 500,
	62	12 * 500 - 2, 14 * 500 - 2, 16 * 500 - 2,
	63	18 * 500 - 2, 20 * 500 - 2, 10240 - 2
	64	};
	65
	66	static const uint64_t vdivs[][2] = {
	67	{ 10, 1000 },
	68	{ 20, 1000 },
	69	{ 50, 1000 },
	70	{ 100, 1000 },
	71	{ 200, 1000 },
	72	{ 500, 1000 },
	73	{ 1, 1 },
	74	{ 2, 1 },
	75	{ 5, 1 },
	76	};
	77
	78	/* Bits 4 and 5 enable relays that add /10 filters to the chain
	79	* Bits 0 and 1 select an output from a resistor array */
	80	static const uint8_t vdivs_map[] = {
	81	0x01, 0x02, 0x03, 0x21, 0x22, 0x23, 0x31, 0x32, 0x33
	82	};
	83
	84
	85	static const char *trigger_sources[] = {
	86	"A", "B", "EXT"
	87	};
	88
89	static const uint8_t trigger_sources_map[] = {
90	0x00, 0x80, 0x40
91	};
92
93	static const char *trigger_slopes[] = {
94	"f", "r"
95	};
96
97	static const char *coupling[] = {
98	"DC", "AC", "GND"
99	};
100
101	static const uint8_t coupling_map[] = {
102	0x00, 0x08, 0x04
103	};
104
15a5bfe4	105	static GSList scan_port(GSList devices, struct parport *port)
05ac4a98	106	{
c9404469 DG	107	struct sr_dev_inst *sdi;
	108	struct sr_channel *ch;
	109	struct sr_channel_group *cg;
	110	struct dev_context *devc;
c9404469	111	int i;
05ac4a98	112
c9404469 DG	113	if (ieee1284_open(port, 0, &i) != E1284_OK) {
	114	sr_err("Can't open parallel port %s", port->name);
	115	goto fail1;
	116	}
05ac4a98	117
c9404469 DG	118	if ((i & (CAP1284_RAW \| CAP1284_BYTE)) != (CAP1284_RAW \| CAP1284_BYTE)) {
	119	sr_err("Parallel port %s does not provide low-level bidirection access",
	120	port->name);
	121	goto fail2;
	122	}
	123
	124	if (ieee1284_claim(port) != E1284_OK) {
	125	sr_err("Parallel port %s already in use", port->name);
	126	goto fail2;
	127	}
	128
	129	if (!hung_chang_dso_2100_check_id(port))
	130	goto fail3;
	131
	132	sdi = g_malloc0(sizeof(struct sr_dev_inst));
	133	sdi->status = SR_ST_INACTIVE;
	134	sdi->vendor = g_strdup("Hung-Chang");
	135	sdi->model = g_strdup("DSO-2100");
c9404469 DG	136	sdi->inst_type = 0; /* FIXME */
	137	sdi->conn = port;
	138	ieee1284_ref(port);
	139
	140	for (i = 0; i < NUM_CHANNELS; i++) {
	141	cg = g_malloc0(sizeof(struct sr_channel_group));
	142	cg->name = g_strdup(trigger_sources[i]);
	143	ch = sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, FALSE, trigger_sources[i]);
	144	cg->channels = g_slist_append(cg->channels, ch);
	145	sdi->channel_groups = g_slist_append(sdi->channel_groups, cg);
	146	}
	147
	148	devc = g_malloc0(sizeof(struct dev_context));
	149	devc->enabled_channel = g_slist_append(NULL, NULL);
	150	devc->channel = 0;
	151	devc->rate = 0;
	152	devc->probe[0] = 10;
	153	devc->probe[1] = 10;
	154	devc->cctl[0] = 0x31; /* 1V/div, DC coupling, trigger on channel A*/
	155	devc->cctl[1] = 0x31; /* 1V/div, DC coupling, no tv sync trigger */
	156	devc->edge = 0;
	157	devc->tlevel = 0x80;
	158	devc->pos[0] = 0x80;
	159	devc->pos[1] = 0x80;
	160	devc->offset[0] = 0x80;
	161	devc->offset[1] = 0x80;
	162	devc->gain[0] = 0x80;
	163	devc->gain[1] = 0x80;
	164	devc->frame_limit = 0;
	165	devc->last_step = 0; /* buffersize = 1000 */
	166	sdi->priv = devc;
	167
c9404469 DG	168	devices = g_slist_append(devices, sdi);
	169
	170	fail3:
	171	ieee1284_release(port);
	172	fail2:
	173	ieee1284_close(port);
	174	fail1:
	175	return devices;
	176	}
	177
	178	static GSList scan(struct sr_dev_driver di, GSList *options)
	179	{
	180	struct parport_list ports;
	181	struct sr_config *src;
	182	const char *conn = NULL;
	183	GSList devices, option;
	184	gboolean port_found;
	185	int i;
	186
	187
	188	for (option = options; option; option = option->next) {
	189	src = option->data;
	190	if (src->key == SR_CONF_CONN) {
	191	conn = g_variant_get_string(src->data, NULL);
	192	break;
	193	}
	194	}
	195
	196	if (!conn)
	197	return NULL;
05ac4a98	198
c9404469 DG	199	if (ieee1284_find_ports(&ports, 0) != E1284_OK)
	200	return NULL;
	201
	202	devices = NULL;
	203	port_found = FALSE;
	204	for (i = 0; i < ports.portc; i++)
	205	if (!strcmp(ports.portv[i]->name, conn)) {
	206	port_found = TRUE;
15a5bfe4	207	devices = scan_port(devices, ports.portv[i]);
c9404469 DG	208	}
	209
	210	if (!port_found) {
	211	sr_err("Parallel port %s not found. Valid names are:", conn);
	212	for (i = 0; i < ports.portc; i++)
	213	sr_err("\t%s", ports.portv[i]->name);
	214	}
	215
	216	ieee1284_free_ports(&ports);
05ac4a98	217
15a5bfe4	218	return std_scan_complete(di, devices);
05ac4a98 DG	219	}
05ac4a98 DG	220
c9404469 DG	221	static void clear_private(void *priv)
	222	{
	223	struct dev_context *devc = priv;
	224
	225	g_slist_free(devc->enabled_channel);
	226	}
	227
05ac4a98 DG	228	static int dev_clear(const struct sr_dev_driver *di)
05ac4a98 DG	229	{
c9404469 DG	230	struct drv_context *drvc = di->context;
	231	struct sr_dev_inst *sdi;
	232	GSList *l;
	233
	234	if (drvc) {
	235	for (l = drvc->instances; l; l = l->next) {
	236	sdi = l->data;
	237	ieee1284_unref(sdi->conn);
	238	}
	239	}
	240
	241	return std_dev_clear(di, clear_private);
05ac4a98 DG	242	}
	243
	244	static int dev_open(struct sr_dev_inst *sdi)
	245	{
c9404469 DG	246	struct dev_context *devc = sdi->priv;
	247	int i;
	248
c9404469 DG	249	if (ieee1284_open(sdi->conn, 0, &i) != E1284_OK)
c9404469 DG	250	goto fail1;
05ac4a98	251
c9404469 DG	252	if (ieee1284_claim(sdi->conn) != E1284_OK)
	253	goto fail2;
	254
	255	if (ieee1284_data_dir(sdi->conn, 1) != E1284_OK)
	256	goto fail3;
	257
	258	if (hung_chang_dso_2100_move_to(sdi, 1))
	259	goto fail3;
	260
	261	devc->samples = g_try_malloc(1000 * sizeof(*devc->samples));
	262	if (!devc->samples)
	263	goto fail3;
05ac4a98	264
05ac4a98	265	return SR_OK;
c9404469 DG	266
	267	fail3:
	268	hung_chang_dso_2100_reset_port(sdi->conn);
	269	ieee1284_release(sdi->conn);
	270	fail2:
	271	ieee1284_close(sdi->conn);
	272	fail1:
	273	return SR_ERR;
05ac4a98 DG	274	}
	275
	276	static int dev_close(struct sr_dev_inst *sdi)
	277	{
c9404469	278	struct dev_context *devc = sdi->priv;
05ac4a98	279
c9404469 DG	280	g_free(devc->samples);
	281	hung_chang_dso_2100_reset_port(sdi->conn);
	282	ieee1284_release(sdi->conn);
	283	ieee1284_close(sdi->conn);
093e1cba	284
05ac4a98 DG	285	sdi->status = SR_ST_INACTIVE;
	286
	287	return SR_OK;
	288	}
	289
c9404469 DG	290	static int find_in_array(GVariant data, const GVariantType type,
	291	const void *arr, int n)
	292	{
	293	const char * const *sarr;
	294	const char *s;
	295	const uint64_t *u64arr;
	296	const uint8_t *u8arr;
	297	uint64_t u64;
	298	uint8_t u8;
	299	int i;
	300
	301	if (!g_variant_is_of_type(data, type))
	302	return -1;
	303
	304	switch (g_variant_classify(data)) {
	305	case G_VARIANT_CLASS_STRING:
	306	s = g_variant_get_string(data, NULL);
	307	sarr = arr;
	308
	309	for (i = 0; i < n; i++)
	310	if (!strcmp(s, sarr[i]))
	311	return i;
	312	break;
	313	case G_VARIANT_CLASS_UINT64:
	314	u64 = g_variant_get_uint64(data);
	315	u64arr = arr;
	316
	317	for (i = 0; i < n; i++)
	318	if (u64 == u64arr[i])
	319	return i;
	320	break;
	321	case G_VARIANT_CLASS_BYTE:
	322	u8 = g_variant_get_byte(data);
	323	u8arr = arr;
	324
	325	for (i = 0; i < n; i++)
	326	if (u8 == u8arr[i])
	327	return i;
	328	default:
	329	break;
	330	}
	331
	332	return -1;
	333	}
	334
	335	static int reverse_map(uint8_t u, const uint8_t *arr, int n)
	336	{
	337	GVariant *v = g_variant_new_byte(u);
	338	int i = find_in_array(v, G_VARIANT_TYPE_BYTE, arr, n);
	339	g_variant_unref(v);
	340	return i;
05ac4a98 DG	341	}
	342
	343	static int config_get(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	344	const struct sr_channel_group *cg)
	345	{
c9404469 DG	346	struct dev_context *devc = sdi->priv;
	347	struct parport *port;
	348	int ret, i, ch = -1;
05ac4a98	349
c9404469 DG	350	if (cg) /* sr_config_get will validate cg using config_list */
c9404469 DG	351	ch = ((struct sr_channel *)cg->channels->data)->index;
05ac4a98 DG	352
	353	ret = SR_OK;
	354	switch (key) {
c9404469 DG	355	case SR_CONF_CONN:
	356	port = sdi->conn;
	357	*data = g_variant_new_string(port->name);
	358	break;
	359	case SR_CONF_LIMIT_FRAMES:
	360	*data = g_variant_new_uint64(devc->frame_limit);
	361	break;
	362	case SR_CONF_SAMPLERATE:
	363	*data = g_variant_new_uint64(samplerates[devc->rate]);
	364	break;
	365	case SR_CONF_TRIGGER_SOURCE:
	366	i = reverse_map(devc->cctl[0] & 0xC0, trigger_sources_map,
	367	ARRAY_SIZE(trigger_sources_map));
	368	if (i == -1)
	369	ret = SR_ERR;
	370	else
	371	*data = g_variant_new_string(trigger_sources[i]);
	372	break;
	373	case SR_CONF_TRIGGER_SLOPE:
	374	if (devc->edge >= ARRAY_SIZE(trigger_slopes))
	375	ret = SR_ERR;
	376	else
	377	*data = g_variant_new_string(trigger_slopes[devc->edge]);
	378	break;
	379	case SR_CONF_BUFFERSIZE:
	380	*data = g_variant_new_uint64(buffersizes[devc->last_step]);
	381	break;
	382	case SR_CONF_VDIV:
	383	if (ch == -1) {
	384	ret = SR_ERR_CHANNEL_GROUP;
	385	} else {
	386	i = reverse_map(devc->cctl[ch] & 0x33, vdivs_map,
	387	ARRAY_SIZE(vdivs_map));
	388	if (i == -1)
	389	ret = SR_ERR;
	390	else
	391	*data = g_variant_new("(tt)", vdivs[i][0],
	392	vdivs[i][1]);
	393	}
	394	break;
	395	case SR_CONF_COUPLING:
	396	if (ch == -1) {
	397	ret = SR_ERR_CHANNEL_GROUP;
	398	} else {
	399	i = reverse_map(devc->cctl[ch] & 0x0C, coupling_map,
	400	ARRAY_SIZE(coupling_map));
	401	if (i == -1)
	402	ret = SR_ERR;
	403	else
	404	*data = g_variant_new_string(coupling[i]);
	405	}
	406	break;
	407	case SR_CONF_PROBE_FACTOR:
	408	if (ch == -1)
	409	ret = SR_ERR_CHANNEL_GROUP;
	410	else
	411	*data = g_variant_new_uint64(devc->probe[ch]);
	412	break;
05ac4a98	413	default:
c9404469	414	ret = SR_ERR_NA;
05ac4a98 DG	415	}
	416
	417	return ret;
	418	}
	419
	420	static int config_set(uint32_t key, GVariant data, const struct sr_dev_inst sdi,
	421	const struct sr_channel_group *cg)
	422	{
c9404469 DG	423	struct dev_context *devc = sdi->priv;
	424	int ret, i, ch = -1;
	425	uint64_t u, v;
05ac4a98	426
c9404469 DG	427	if (cg) /* sr_config_set will validate cg using config_list */
c9404469 DG	428	ch = ((struct sr_channel *)cg->channels->data)->index;
05ac4a98	429
05ac4a98 DG	430	ret = SR_OK;
05ac4a98 DG	431	switch (key) {
c9404469 DG	432	case SR_CONF_LIMIT_FRAMES:
	433	devc->frame_limit = g_variant_get_uint64(data);
	434	break;
	435	case SR_CONF_SAMPLERATE:
	436	i = find_in_array(data, G_VARIANT_TYPE_UINT64,
	437	samplerates, ARRAY_SIZE(samplerates));
	438	if (i == -1)
	439	ret = SR_ERR_ARG;
	440	else
	441	devc->rate = i;
	442	break;
	443	case SR_CONF_TRIGGER_SOURCE:
	444	i = find_in_array(data, G_VARIANT_TYPE_STRING,
	445	trigger_sources, ARRAY_SIZE(trigger_sources));
	446	if (i == -1)
	447	ret = SR_ERR_ARG;
	448	else
	449	devc->cctl[0] = (devc->cctl[0] & 0x3F)
	450	\| trigger_sources_map[i];
	451	break;
	452	case SR_CONF_TRIGGER_SLOPE:
	453	i = find_in_array(data, G_VARIANT_TYPE_STRING,
	454	trigger_slopes, ARRAY_SIZE(trigger_slopes));
	455	if (i == -1)
	456	ret = SR_ERR_ARG;
	457	else
	458	devc->edge = i;
	459	break;
	460	case SR_CONF_BUFFERSIZE:
	461	i = find_in_array(data, G_VARIANT_TYPE_UINT64,
	462	buffersizes, ARRAY_SIZE(buffersizes));
	463	if (i == -1)
	464	ret = SR_ERR_ARG;
	465	else
	466	devc->last_step = i;
	467	break;
	468	case SR_CONF_VDIV:
	469	if (ch == -1) {
	470	ret = SR_ERR_CHANNEL_GROUP;
	471	} else if (!g_variant_is_of_type(data, G_VARIANT_TYPE("(tt)"))) {
	472	ret = SR_ERR_ARG;
	473	} else {
	474	g_variant_get(data, "(tt)", &u, &v);
	475	for (i = 0; i < (int)ARRAY_SIZE(vdivs); i++)
	476	if (vdivs[i][0] == u && vdivs[i][1] == v)
	477	break;
	478	if (i == ARRAY_SIZE(vdivs))
	479	ret = SR_ERR_ARG;
	480	else
	481	devc->cctl[ch] = (devc->cctl[ch] & 0xCC)
	482	\| vdivs_map[i];
	483	}
	484	break;
	485	case SR_CONF_COUPLING:
	486	if (ch == -1) {
	487	ret = SR_ERR_CHANNEL_GROUP;
	488	} else {
	489	i = find_in_array(data, G_VARIANT_TYPE_STRING,
	490	coupling, ARRAY_SIZE(coupling));
	491	if (i == -1)
	492	ret = SR_ERR_ARG;
	493	else
	494	devc->cctl[ch] = (devc->cctl[ch] & 0xF3)
	495	\| coupling_map[i];
496	}
497	break;
498	case SR_CONF_PROBE_FACTOR:
499	if (ch == -1) {
500	ret = SR_ERR_CHANNEL_GROUP;
501	} else {
502	u = g_variant_get_uint64(data);
503	if (!u)
504	ret = SR_ERR_ARG;
505	else
506	devc->probe[ch] = u;
507	}
508	break;
05ac4a98 DG	509	default:
	510	ret = SR_ERR_NA;
	511	}
	512
	513	return ret;
	514	}
	515
c9404469 DG	516	static int config_channel_set(const struct sr_dev_inst *sdi,
	517	struct sr_channel *ch,
	518	unsigned int changes)
	519	{
	520	struct dev_context *devc = sdi->priv;
	521	uint8_t v;
	522
	523	if (changes & SR_CHANNEL_SET_ENABLED) {
	524	if (ch->enabled) {
	525	v = devc->channel \| (1 << ch->index);
	526	if (v & (v - 1))
	527	return SR_ERR;
	528	devc->channel = v;
	529	devc->enabled_channel->data = ch;
	530	} else {
	531	devc->channel &= ~(1 << ch->index);
	532	}
	533	}
	534	return SR_OK;
	535	}
	536
	537	static int config_commit(const struct sr_dev_inst *sdi)
05ac4a98	538	{
c9404469	539	uint8_t state = hung_chang_dso_2100_read_mbox(sdi->conn, 0.02);
05ac4a98 DG	540	int ret;
05ac4a98 DG	541
c9404469 DG	542	switch (state) {
	543	case 0x03:
	544	case 0x14:
	545	case 0x21:
	546	/* we will travel the complete config path on our way to state 1 */
	547	break;
	548	case 0x00:
	549	state = 0x01;
276d7b18	550	/* Fallthrough */
c9404469 DG	551	default:
	552	ret = hung_chang_dso_2100_move_to(sdi, 1);
	553	if (ret != SR_OK)
	554	return ret;
276d7b18	555	/* Fallthrough */
c9404469 DG	556	case 0x01:
	557	hung_chang_dso_2100_write_mbox(sdi->conn, 4);
	558	}
	559	ret = hung_chang_dso_2100_move_to(sdi, 1);
	560	if (ret != SR_OK)
	561	return ret;
	562	return hung_chang_dso_2100_move_to(sdi, state);
	563	}
	564
	565	static int config_list(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	566	const struct sr_channel_group *cg)
	567	{
	568	GVariantBuilder gvb;
	569	GVariant gvar, rational[2];
	570	GSList *l;
	571	int i;
05ac4a98	572
05ac4a98	573	switch (key) {
c9404469 DG	574	case SR_CONF_SCAN_OPTIONS:
	575	case SR_CONF_DEVICE_OPTIONS:
	576	break;
	577	case SR_CONF_SAMPLERATE:
	578	case SR_CONF_TRIGGER_SOURCE:
	579	case SR_CONF_TRIGGER_SLOPE:
	580	case SR_CONF_BUFFERSIZE:
	581	if (!sdi \|\| cg)
	582	return SR_ERR_NA;
	583	break;
	584	case SR_CONF_VDIV:
	585	case SR_CONF_COUPLING:
	586	if (!sdi)
	587	return SR_ERR_NA;
	588	if (!cg)
	589	return SR_ERR_CHANNEL_GROUP;
	590	l = g_slist_find(sdi->channel_groups, cg);
	591	if (!l)
	592	return SR_ERR_ARG;
	593	break;
05ac4a98 DG	594	default:
	595	return SR_ERR_NA;
	596	}
	597
c9404469 DG	598	switch (key) {
	599	case SR_CONF_SCAN_OPTIONS:
	600	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	601	scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
	602	break;
	603	case SR_CONF_DEVICE_OPTIONS:
	604	if (!sdi)
	605	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	606	drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
	607	else if (!cg)
	608	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	609	devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
	610	else
	611	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	612	cgopts, ARRAY_SIZE(cgopts), sizeof(uint32_t));
	613	break;
	614	case SR_CONF_SAMPLERATE:
	615	g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
	616	gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
	617	samplerates, ARRAY_SIZE(samplerates), sizeof(uint64_t));
	618	g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
	619	*data = g_variant_builder_end(&gvb);
	620	break;
	621	case SR_CONF_TRIGGER_SOURCE:
	622	*data = g_variant_new_strv(trigger_sources, ARRAY_SIZE(trigger_sources));
	623	break;
	624	case SR_CONF_TRIGGER_SLOPE:
	625	*data = g_variant_new_strv(trigger_slopes, ARRAY_SIZE(trigger_slopes));
	626	break;
	627	case SR_CONF_BUFFERSIZE:
	628	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT64,
	629	buffersizes, ARRAY_SIZE(buffersizes), sizeof(uint64_t));
	630	break;
	631	case SR_CONF_VDIV:
	632	g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
	633	for (i = 0; i < (int)ARRAY_SIZE(vdivs); i++) {
	634	rational[0] = g_variant_new_uint64(vdivs[i][0]);
	635	rational[1] = g_variant_new_uint64(vdivs[i][1]);
	636	gvar = g_variant_new_tuple(rational, 2);
	637	g_variant_builder_add_value(&gvb, gvar);
	638	}
	639	*data = g_variant_builder_end(&gvb);
	640	break;
	641	case SR_CONF_COUPLING:
	642	*data = g_variant_new_strv(coupling, ARRAY_SIZE(coupling));
	643	break;
	644	}
	645
	646	return SR_OK;
05ac4a98 DG	647	}
05ac4a98 DG	648
695dc859	649	static int dev_acquisition_start(const struct sr_dev_inst *sdi)
05ac4a98	650	{
c9404469 DG	651	struct dev_context *devc = sdi->priv;
c9404469 DG	652	int ret;
05ac4a98	653
c9404469 DG	654	if (devc->channel) {
	655	static const float res_array[] = {0.5, 1, 2, 5};
	656	static const uint8_t relays[] = {100, 10, 10, 1};
	657	devc->factor = devc->probe[devc->channel - 1] / 32.0;
	658	devc->factor *= res_array[devc->cctl[devc->channel - 1] & 0x03];
	659	devc->factor /= relays[(devc->cctl[devc->channel - 1] >> 4) & 0x03];
	660	}
	661	devc->frame = 0;
c9404469 DG	662	devc->state_known = TRUE;
	663	devc->step = 0;
	664	devc->adc2 = FALSE;
	665	devc->retries = MAX_RETRIES;
	666
	667	ret = hung_chang_dso_2100_move_to(sdi, 0x21);
	668	if (ret != SR_OK)
	669	return ret;
	670
bee2b016	671	std_session_send_df_header(sdi);
c9404469	672
b165a242	673	sr_session_source_add(sdi->session, -1, 0, 8,
c9404469	674	hung_chang_dso_2100_poll, (void *)sdi);
05ac4a98 DG	675
	676	return SR_OK;
	677	}
	678
d2f7c417	679	static int dev_acquisition_stop(struct sr_dev_inst *sdi)
05ac4a98	680	{
bee2b016	681	std_session_send_df_end(sdi);
b165a242	682	sr_session_source_remove(sdi->session, -1);
c9404469	683	hung_chang_dso_2100_move_to(sdi, 1);
05ac4a98 DG	684
	685	return SR_OK;
	686	}
	687
dd5c48a6	688	static struct sr_dev_driver hung_chang_dso_2100_driver_info = {
05ac4a98 DG	689	.name = "hung-chang-dso-2100",
	690	.longname = "Hung-Chang DSO-2100",
	691	.api_version = 1,
c2fdcc25	692	.init = std_init,
700d6b64	693	.cleanup = std_cleanup,
05ac4a98	694	.scan = scan,
c01bf34c	695	.dev_list = std_dev_list,
05ac4a98 DG	696	.dev_clear = dev_clear,
	697	.config_get = config_get,
	698	.config_set = config_set,
c9404469 DG	699	.config_channel_set = config_channel_set,
c9404469 DG	700	.config_commit = config_commit,
05ac4a98 DG	701	.config_list = config_list,
	702	.dev_open = dev_open,
	703	.dev_close = dev_close,
	704	.dev_acquisition_start = dev_acquisition_start,
	705	.dev_acquisition_stop = dev_acquisition_stop,
	706	.context = NULL,
	707	};
dd5c48a6	708	SR_REGISTER_DEV_DRIVER(hung_chang_dso_2100_driver_info);