[libsigrok.git] / src / hardware / kecheng-kc-330b / api.c

/*
 * 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 <config.h>
#include <string.h>
#include "protocol.h"

#define USB_CONN "1041.8101"
#define VENDOR "Kecheng"
#define USB_INTERFACE 0

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

static const uint32_t devopts[] = {
	SR_CONF_CONTINUOUS,
	SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET,
	SR_CONF_SAMPLE_INTERVAL | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
	SR_CONF_DATALOG | SR_CONF_GET,
	SR_CONF_SPL_WEIGHT_FREQ | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
	SR_CONF_SPL_WEIGHT_TIME | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
	SR_CONF_DATA_SOURCE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
};

SR_PRIV const uint64_t kecheng_kc_330b_sample_intervals[][2] = {
	{ 1, 8 },
	{ 1, 2 },
	{ 1, 1 },
	{ 2, 1 },
	{ 5, 1 },
	{ 10, 1 },
	{ 60, 1 },
};

static const char *weight_freq[] = {
	"A", "C",
};

static const char *weight_time[] = {
	"F", "S",
};

static const char *data_sources[] = {
	"Live", "Memory",
};

static int scan_kecheng(struct sr_dev_driver *di,
		struct sr_usb_dev_inst *usb, char **model)
{
	struct drv_context *drvc;
	int len, ret;
	unsigned char cmd, buf[32];

	drvc = di->context;
	if (sr_usb_open(drvc->sr_ctx->libusb_ctx, usb) != SR_OK)
		return SR_ERR;

	cmd = CMD_IDENTIFY;
	ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, &cmd, 1, &len, 5);
	if (ret != 0) {
		libusb_close(usb->devhdl);
		sr_dbg("Failed to send Identify command: %s", libusb_error_name(ret));
		return SR_ERR;
	}

	ret = libusb_bulk_transfer(usb->devhdl, EP_IN, buf, 32, &len, 10);
	if (ret != 0) {
		libusb_close(usb->devhdl);
		sr_dbg("Failed to receive response: %s", libusb_error_name(ret));
		return SR_ERR;
	}

	libusb_close(usb->devhdl);
	usb->devhdl = NULL;

	if (len < 2 || buf[0] != (CMD_IDENTIFY | 0x80) || buf[1] > 30) {
		sr_dbg("Invalid response to Identify command");
		return SR_ERR;
	}

	buf[buf[1] + 2] = '\x0';
	*model = g_strndup((const gchar *)buf + 2, 30);

	return SR_OK;
}

static GSList *scan(struct sr_dev_driver *di, GSList *options)
{
	struct drv_context *drvc;
	struct dev_context *devc;
	struct sr_dev_inst *sdi;
	GSList *usb_devices, *devices, *l;
	char *model;

	(void)options;

	drvc = di->context;

	devices = NULL;
	if ((usb_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, USB_CONN))) {
		/* We have a list of sr_usb_dev_inst matching the connection
		 * string. Wrap them in sr_dev_inst and we're done. */
		for (l = usb_devices; l; l = l->next) {
			if (scan_kecheng(di, l->data, &model) != SR_OK)
				continue;
			sdi = g_malloc0(sizeof(struct sr_dev_inst));
			sdi->status = SR_ST_INACTIVE;
			sdi->vendor = g_strdup(VENDOR);
			sdi->model = model; /* Already g_strndup()'d. */
			sdi->inst_type = SR_INST_USB;
			sdi->conn = l->data;
			sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "SPL");
			devc = g_malloc0(sizeof(struct dev_context));
			sdi->priv = devc;
			devc->limit_samples = 0;
			/* The protocol provides no way to read the current
			 * settings, so we'll enforce these. */
			devc->sample_interval = DEFAULT_SAMPLE_INTERVAL;
			devc->alarm_low = DEFAULT_ALARM_LOW;
			devc->alarm_high = DEFAULT_ALARM_HIGH;
			devc->mqflags = DEFAULT_WEIGHT_TIME | DEFAULT_WEIGHT_FREQ;
			devc->data_source = DEFAULT_DATA_SOURCE;
			devc->config_dirty = FALSE;

			/* TODO: Set date/time? */

			devices = g_slist_append(devices, sdi);
		}
		g_slist_free(usb_devices);
	} else
		g_slist_free_full(usb_devices, g_free);

	return std_scan_complete(di, devices);
}

static int dev_open(struct sr_dev_inst *sdi)
{
	struct sr_dev_driver *di = sdi->driver;
	struct drv_context *drvc = di->context;
	struct sr_usb_dev_inst *usb;
	int ret;

	usb = sdi->conn;

	if (sr_usb_open(drvc->sr_ctx->libusb_ctx, usb) != SR_OK)
		return SR_ERR;

	if ((ret = libusb_set_configuration(usb->devhdl, 1))) {
		sr_err("Failed to set configuration: %s.", libusb_error_name(ret));
		return SR_ERR;
	}

	if ((ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE))) {
		sr_err("Failed to claim interface: %s.", libusb_error_name(ret));
		return SR_ERR;
	}

	return SR_OK;
}

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

	usb = sdi->conn;

	if (!usb->devhdl)
		return SR_ERR_BUG;

	/* This allows a frontend to configure the device without ever
	 * doing an acquisition step. */
	devc = sdi->priv;
	if (!devc->config_dirty)
		kecheng_kc_330b_configure(sdi);

	libusb_release_interface(usb->devhdl, USB_INTERFACE);
	libusb_close(usb->devhdl);
	usb->devhdl = NULL;

	return SR_OK;
}

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;
	GVariant *rational[2];
	const uint64_t *si;

	(void)cg;

	devc = sdi->priv;
	switch (key) {
	case SR_CONF_LIMIT_SAMPLES:
		*data = g_variant_new_uint64(devc->limit_samples);
		break;
	case SR_CONF_SAMPLE_INTERVAL:
		si = kecheng_kc_330b_sample_intervals[devc->sample_interval];
		rational[0] = g_variant_new_uint64(si[0]);
		rational[1] = g_variant_new_uint64(si[1]);
		*data = g_variant_new_tuple(rational, 2);
		break;
	case SR_CONF_DATALOG:
		/* There really isn't a way to be sure the device is logging. */
		return SR_ERR_NA;
		break;
	case SR_CONF_SPL_WEIGHT_FREQ:
		if (devc->mqflags & SR_MQFLAG_SPL_FREQ_WEIGHT_A)
			*data = g_variant_new_string("A");
		else
			*data = g_variant_new_string("C");
		break;
	case SR_CONF_SPL_WEIGHT_TIME:
		if (devc->mqflags & SR_MQFLAG_SPL_TIME_WEIGHT_F)
			*data = g_variant_new_string("F");
		else
			*data = g_variant_new_string("S");
		break;
	case SR_CONF_DATA_SOURCE:
		if (devc->data_source == DATA_SOURCE_LIVE)
			*data = g_variant_new_string("Live");
		else
			*data = g_variant_new_string("Memory");
		break;
	default:
		return SR_ERR_NA;
	}

	return SR_OK;
}

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;
	uint64_t p, q;
	unsigned int i;
	int tmp;
	const char *tmp_str;

	(void)cg;

	devc = sdi->priv;
	switch (key) {
	case SR_CONF_LIMIT_SAMPLES:
		devc->limit_samples = g_variant_get_uint64(data);
		sr_dbg("Setting sample limit to %" PRIu64 ".",
		       devc->limit_samples);
		break;
	case SR_CONF_SAMPLE_INTERVAL:
		g_variant_get(data, "(tt)", &p, &q);
		for (i = 0; i < ARRAY_SIZE(kecheng_kc_330b_sample_intervals); i++) {
			if (kecheng_kc_330b_sample_intervals[i][0] != p || kecheng_kc_330b_sample_intervals[i][1] != q)
				continue;
			devc->sample_interval = i;
			devc->config_dirty = TRUE;
			break;
		}
		if (i == ARRAY_SIZE(kecheng_kc_330b_sample_intervals))
			return SR_ERR_ARG;
		break;
	case SR_CONF_SPL_WEIGHT_FREQ:
		tmp_str = g_variant_get_string(data, NULL);
		if (!strcmp(tmp_str, "A"))
			tmp = SR_MQFLAG_SPL_FREQ_WEIGHT_A;
		else if (!strcmp(tmp_str, "C"))
			tmp = SR_MQFLAG_SPL_FREQ_WEIGHT_C;
		else
			return SR_ERR_ARG;
		devc->mqflags &= ~(SR_MQFLAG_SPL_FREQ_WEIGHT_A | SR_MQFLAG_SPL_FREQ_WEIGHT_C);
		devc->mqflags |= tmp;
		devc->config_dirty = TRUE;
		break;
	case SR_CONF_SPL_WEIGHT_TIME:
		tmp_str = g_variant_get_string(data, NULL);
		if (!strcmp(tmp_str, "F"))
			tmp = SR_MQFLAG_SPL_TIME_WEIGHT_F;
		else if (!strcmp(tmp_str, "S"))
			tmp = SR_MQFLAG_SPL_TIME_WEIGHT_S;
		else
			return SR_ERR_ARG;
		devc->mqflags &= ~(SR_MQFLAG_SPL_TIME_WEIGHT_F | SR_MQFLAG_SPL_TIME_WEIGHT_S);
		devc->mqflags |= tmp;
		devc->config_dirty = TRUE;
		break;
	case SR_CONF_DATA_SOURCE:
		tmp_str = g_variant_get_string(data, NULL);
		if (!strcmp(tmp_str, "Live"))
			devc->data_source = DATA_SOURCE_LIVE;
		else if (!strcmp(tmp_str, "Memory"))
			devc->data_source = DATA_SOURCE_MEMORY;
		else
			return SR_ERR;
		devc->config_dirty = TRUE;
		break;
	default:
		return SR_ERR_NA;
	}

	return SR_OK;
}

static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
		const struct sr_channel_group *cg)
{
	switch (key) {
	case SR_CONF_DEVICE_OPTIONS:
		return STD_CONFIG_LIST(key, data, sdi, cg, NULL, drvopts, devopts);
	case SR_CONF_SAMPLE_INTERVAL:
		*data = std_gvar_tuple_array(&kecheng_kc_330b_sample_intervals,
				ARRAY_SIZE(kecheng_kc_330b_sample_intervals));
		break;
	case SR_CONF_SPL_WEIGHT_FREQ:
		*data = g_variant_new_strv(ARRAY_AND_SIZE(weight_freq));
		break;
	case SR_CONF_SPL_WEIGHT_TIME:
		*data = g_variant_new_strv(ARRAY_AND_SIZE(weight_time));
		break;
	case SR_CONF_DATA_SOURCE:
		*data = g_variant_new_strv(ARRAY_AND_SIZE(data_sources));
		break;
	default:
		return SR_ERR_NA;
	}

	return SR_OK;
}

static int dev_acquisition_start(const struct sr_dev_inst *sdi)
{
	struct sr_dev_driver *di = sdi->driver;
	struct drv_context *drvc;
	struct dev_context *devc;
	struct sr_datafeed_packet packet;
	struct sr_datafeed_meta meta;
	struct sr_config *src;
	struct sr_usb_dev_inst *usb;
	GVariant *gvar, *rational[2];
	const uint64_t *si;
	int req_len, buf_len, len, ret;
	unsigned char buf[9];

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

	devc->num_samples = 0;

	std_session_send_df_header(sdi);

	if (devc->data_source == DATA_SOURCE_LIVE) {
		/* Force configuration. */
		kecheng_kc_330b_configure(sdi);

		if (kecheng_kc_330b_status_get(sdi, &ret) != SR_OK)
			return SR_ERR;
		if (ret != DEVICE_ACTIVE) {
			sr_err("Device is inactive");
			/* Still continue though, since the device will
			 * just return 30.0 until the user hits the button
			 * on the device -- and then start feeding good
			 * samples back. */
		}
	} else {
		if (kecheng_kc_330b_log_info_get(sdi, buf) != SR_OK)
			return SR_ERR;
		devc->mqflags = buf[4] ? SR_MQFLAG_SPL_TIME_WEIGHT_S : SR_MQFLAG_SPL_TIME_WEIGHT_F;
		devc->mqflags |= buf[5] ? SR_MQFLAG_SPL_FREQ_WEIGHT_C : SR_MQFLAG_SPL_FREQ_WEIGHT_A;
		devc->stored_samples = (buf[7] << 8) | buf[8];
		if (devc->stored_samples == 0) {
			/* Notify frontend of empty log by sending start/end packets. */
			std_session_send_df_end(sdi);
			return SR_OK;
		}

		if (devc->limit_samples && devc->limit_samples < devc->stored_samples)
			devc->stored_samples = devc->limit_samples;

		si = kecheng_kc_330b_sample_intervals[buf[1]];
		rational[0] = g_variant_new_uint64(si[0]);
		rational[1] = g_variant_new_uint64(si[1]);
		gvar = g_variant_new_tuple(rational, 2);
		src = sr_config_new(SR_CONF_SAMPLE_INTERVAL, gvar);
		packet.type = SR_DF_META;
		packet.payload = &meta;
		meta.config = g_slist_append(NULL, src);
		sr_session_send(sdi, &packet);
		g_free(src);
	}

	if (!(devc->xfer = libusb_alloc_transfer(0)))
		return SR_ERR;

	usb_source_add(sdi->session, drvc->sr_ctx, 10,
		kecheng_kc_330b_handle_events, (void *)sdi);

	if (devc->data_source == DATA_SOURCE_LIVE) {
		buf[0] = CMD_GET_LIVE_SPL;
		buf_len = 1;
		devc->state = LIVE_SPL_WAIT;
		devc->last_live_request = g_get_monotonic_time() / 1000;
		req_len = 3;
	} else {
		buf[0] = CMD_GET_LOG_DATA;
		buf[1] = 0;
		buf[2] = 0;
		buf_len = 4;
		devc->state = LOG_DATA_WAIT;
		if (devc->stored_samples < 63)
			buf[3] = devc->stored_samples;
		else
			buf[3] = 63;
		/* Command ack byte + 2 bytes per sample. */
		req_len = 1 + buf[3] * 2;
	}

	ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, buf, buf_len, &len, 5);
	if (ret != 0 || len != 1) {
		sr_dbg("Failed to start acquisition: %s", libusb_error_name(ret));
		libusb_free_transfer(devc->xfer);
		return SR_ERR;
	}

	libusb_fill_bulk_transfer(devc->xfer, usb->devhdl, EP_IN, devc->buf,
			req_len, kecheng_kc_330b_receive_transfer, (void *)sdi, 15);
	if (libusb_submit_transfer(devc->xfer) != 0) {
		libusb_free_transfer(devc->xfer);
		return SR_ERR;
	}

	return SR_OK;
}

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

	/* Signal USB transfer handler to clean up and stop. */
	sdi->status = SR_ST_STOPPING;

	devc = sdi->priv;
	if (devc->data_source == DATA_SOURCE_MEMORY && devc->config_dirty) {
		/* The protocol doesn't have a command to clear stored data;
		 * it clears it whenever new configuration is set. That means
		 * we can't just configure the device any time we want when
		 * it's in DATA_SOURCE_MEMORY mode. The only safe time to do
		 * it is now, when we're sure we've pulled in all the stored
		 * data. */
		kecheng_kc_330b_configure(sdi);
	}

	return SR_OK;
}

static struct sr_dev_driver kecheng_kc_330b_driver_info = {
	.name = "kecheng-kc-330b",
	.longname = "Kecheng KC-330B",
	.api_version = 1,
	.init = std_init,
	.cleanup = std_cleanup,
	.scan = scan,
	.dev_list = std_dev_list,
	.dev_clear = std_dev_clear,
	.config_get = config_get,
	.config_set = config_set,
	.config_list = config_list,
	.dev_open = dev_open,
	.dev_close = dev_close,
	.dev_acquisition_start = dev_acquisition_start,
	.dev_acquisition_stop = dev_acquisition_stop,
	.context = NULL,
};
SR_REGISTER_DEV_DRIVER(kecheng_kc_330b_driver_info);
Commit	Line	Data
ed759a08 BV	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
	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>
bc7be4a9	21	#include <string.h>
ed759a08 BV	22	#include "protocol.h"
ed759a08 BV	23
a8806f03 BV	24	#define USB_CONN "1041.8101"
	25	#define VENDOR "Kecheng"
	26	#define USB_INTERFACE 0
a8806f03	27
05199c0a	28	static const uint32_t drvopts[] = {
a8806f03	29	SR_CONF_SOUNDLEVELMETER,
05199c0a UH	30	};
	31
	32	static const uint32_t devopts[] = {
a8806f03	33	SR_CONF_CONTINUOUS,
5827f61b BV	34	SR_CONF_LIMIT_SAMPLES \| SR_CONF_GET \| SR_CONF_SET,
	35	SR_CONF_SAMPLE_INTERVAL \| SR_CONF_GET \| SR_CONF_SET \| SR_CONF_LIST,
	36	SR_CONF_DATALOG \| SR_CONF_GET,
	37	SR_CONF_SPL_WEIGHT_FREQ \| SR_CONF_GET \| SR_CONF_SET \| SR_CONF_LIST,
	38	SR_CONF_SPL_WEIGHT_TIME \| SR_CONF_GET \| SR_CONF_SET \| SR_CONF_LIST,
	39	SR_CONF_DATA_SOURCE \| SR_CONF_GET \| SR_CONF_SET \| SR_CONF_LIST,
bc7be4a9 BV	40	};
bc7be4a9 BV	41
df035528	42	SR_PRIV const uint64_t kecheng_kc_330b_sample_intervals[][2] = {
bc7be4a9 BV	43	{ 1, 8 },
	44	{ 1, 2 },
	45	{ 1, 1 },
	46	{ 2, 1 },
	47	{ 5, 1 },
	48	{ 10, 1 },
	49	{ 60, 1 },
	50	};
	51
	52	static const char *weight_freq[] = {
f8195cb2	53	"A", "C",
bc7be4a9 BV	54	};
	55
	56	static const char *weight_time[] = {
f8195cb2	57	"F", "S",
bc7be4a9 BV	58	};
	59
	60	static const char *data_sources[] = {
f8195cb2	61	"Live", "Memory",
a8806f03 BV	62	};
a8806f03 BV	63
4f840ce9 ML	64	static int scan_kecheng(struct sr_dev_driver *di,
4f840ce9 ML	65	struct sr_usb_dev_inst usb, char *model)
a8806f03 BV	66	{
	67	struct drv_context *drvc;
	68	int len, ret;
	69	unsigned char cmd, buf[32];
	70
41812aca	71	drvc = di->context;
a8806f03 BV	72	if (sr_usb_open(drvc->sr_ctx->libusb_ctx, usb) != SR_OK)
	73	return SR_ERR;
	74
	75	cmd = CMD_IDENTIFY;
	76	ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, &cmd, 1, &len, 5);
	77	if (ret != 0) {
	78	libusb_close(usb->devhdl);
	79	sr_dbg("Failed to send Identify command: %s", libusb_error_name(ret));
	80	return SR_ERR;
	81	}
	82
	83	ret = libusb_bulk_transfer(usb->devhdl, EP_IN, buf, 32, &len, 10);
	84	if (ret != 0) {
	85	libusb_close(usb->devhdl);
	86	sr_dbg("Failed to receive response: %s", libusb_error_name(ret));
	87	return SR_ERR;
	88	}
	89
	90	libusb_close(usb->devhdl);
	91	usb->devhdl = NULL;
	92
	93	if (len < 2 \|\| buf[0] != (CMD_IDENTIFY \| 0x80) \|\| buf[1] > 30) {
	94	sr_dbg("Invalid response to Identify command");
	95	return SR_ERR;
	96	}
	97
	98	buf[buf[1] + 2] = '\x0';
	99	model = g_strndup((const gchar )buf + 2, 30);
a8806f03 BV	100
	101	return SR_OK;
	102	}
	103
4f840ce9	104	static GSList scan(struct sr_dev_driver di, GSList *options)
ed759a08 BV	105	{
ed759a08 BV	106	struct drv_context *drvc;
a8806f03 BV	107	struct dev_context *devc;
a8806f03 BV	108	struct sr_dev_inst *sdi;
a8806f03 BV	109	GSList usb_devices, devices, *l;
a8806f03 BV	110	char *model;
ed759a08 BV	111
	112	(void)options;
	113
41812aca	114	drvc = di->context;
ed759a08	115
a8806f03 BV	116	devices = NULL;
	117	if ((usb_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, USB_CONN))) {
	118	/* We have a list of sr_usb_dev_inst matching the connection
	119	* string. Wrap them in sr_dev_inst and we're done. */
	120	for (l = usb_devices; l; l = l->next) {
4f840ce9	121	if (scan_kecheng(di, l->data, &model) != SR_OK)
a8806f03	122	continue;
aac29cc1	123	sdi = g_malloc0(sizeof(struct sr_dev_inst));
0af636be UH	124	sdi->status = SR_ST_INACTIVE;
	125	sdi->vendor = g_strdup(VENDOR);
	126	sdi->model = model; /* Already g_strndup()'d. */
a8806f03 BV	127	sdi->inst_type = SR_INST_USB;
a8806f03 BV	128	sdi->conn = l->data;
5e23fcab	129	sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "SPL");
f57d8ffe	130	devc = g_malloc0(sizeof(struct dev_context));
a8806f03 BV	131	sdi->priv = devc;
a8806f03 BV	132	devc->limit_samples = 0;
bc7be4a9 BV	133	/* The protocol provides no way to read the current
	134	* settings, so we'll enforce these. */
	135	devc->sample_interval = DEFAULT_SAMPLE_INTERVAL;
	136	devc->alarm_low = DEFAULT_ALARM_LOW;
	137	devc->alarm_high = DEFAULT_ALARM_HIGH;
	138	devc->mqflags = DEFAULT_WEIGHT_TIME \| DEFAULT_WEIGHT_FREQ;
	139	devc->data_source = DEFAULT_DATA_SOURCE;
85ed4ab3	140	devc->config_dirty = FALSE;
bc7be4a9 BV	141
bc7be4a9 BV	142	/* TODO: Set date/time? */
a8806f03	143
a8806f03 BV	144	devices = g_slist_append(devices, sdi);
	145	}
	146	g_slist_free(usb_devices);
	147	} else
	148	g_slist_free_full(usb_devices, g_free);
ed759a08	149
15a5bfe4	150	return std_scan_complete(di, devices);
ed759a08 BV	151	}
ed759a08 BV	152
ed759a08 BV	153	static int dev_open(struct sr_dev_inst *sdi)
ed759a08 BV	154	{
4f840ce9	155	struct sr_dev_driver *di = sdi->driver;
efa98402	156	struct drv_context *drvc = di->context;
a8806f03 BV	157	struct sr_usb_dev_inst *usb;
	158	int ret;
	159
a8806f03	160	usb = sdi->conn;
ed759a08	161
a8806f03 BV	162	if (sr_usb_open(drvc->sr_ctx->libusb_ctx, usb) != SR_OK)
a8806f03 BV	163	return SR_ERR;
ed759a08	164
85ed4ab3 BV	165	if ((ret = libusb_set_configuration(usb->devhdl, 1))) {
	166	sr_err("Failed to set configuration: %s.", libusb_error_name(ret));
	167	return SR_ERR;
	168	}
	169
a8806f03 BV	170	if ((ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE))) {
	171	sr_err("Failed to claim interface: %s.", libusb_error_name(ret));
	172	return SR_ERR;
	173	}
ed759a08	174
7e463623	175	return SR_OK;
ed759a08 BV	176	}
	177
	178	static int dev_close(struct sr_dev_inst *sdi)
	179	{
85ed4ab3	180	struct dev_context *devc;
a8806f03 BV	181	struct sr_usb_dev_inst *usb;
a8806f03 BV	182
a8806f03	183	usb = sdi->conn;
ed759a08	184
a8806f03	185	if (!usb->devhdl)
f1ba6b4b	186	return SR_ERR_BUG;
ed759a08	187
85ed4ab3 BV	188	/* This allows a frontend to configure the device without ever
	189	* doing an acquisition step. */
	190	devc = sdi->priv;
	191	if (!devc->config_dirty)
	192	kecheng_kc_330b_configure(sdi);
	193
a8806f03 BV	194	libusb_release_interface(usb->devhdl, USB_INTERFACE);
	195	libusb_close(usb->devhdl);
	196	usb->devhdl = NULL;
ed759a08 BV	197
	198	return SR_OK;
	199	}
	200
584560f1	201	static int config_get(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
53b4680f	202	const struct sr_channel_group *cg)
ed759a08	203	{
a8806f03	204	struct dev_context *devc;
bc7be4a9 BV	205	GVariant *rational[2];
bc7be4a9 BV	206	const uint64_t *si;
ed759a08	207
53b4680f	208	(void)cg;
d3c74a6f	209
a8806f03	210	devc = sdi->priv;
ed759a08	211	switch (key) {
a8806f03 BV	212	case SR_CONF_LIMIT_SAMPLES:
	213	*data = g_variant_new_uint64(devc->limit_samples);
	214	break;
bc7be4a9	215	case SR_CONF_SAMPLE_INTERVAL:
df035528	216	si = kecheng_kc_330b_sample_intervals[devc->sample_interval];
bc7be4a9 BV	217	rational[0] = g_variant_new_uint64(si[0]);
	218	rational[1] = g_variant_new_uint64(si[1]);
	219	*data = g_variant_new_tuple(rational, 2);
	220	break;
	221	case SR_CONF_DATALOG:
85ed4ab3 BV	222	/* There really isn't a way to be sure the device is logging. */
85ed4ab3 BV	223	return SR_ERR_NA;
bc7be4a9 BV	224	break;
	225	case SR_CONF_SPL_WEIGHT_FREQ:
	226	if (devc->mqflags & SR_MQFLAG_SPL_FREQ_WEIGHT_A)
	227	*data = g_variant_new_string("A");
	228	else
	229	*data = g_variant_new_string("C");
	230	break;
	231	case SR_CONF_SPL_WEIGHT_TIME:
	232	if (devc->mqflags & SR_MQFLAG_SPL_TIME_WEIGHT_F)
	233	*data = g_variant_new_string("F");
	234	else
	235	*data = g_variant_new_string("S");
	236	break;
	237	case SR_CONF_DATA_SOURCE:
	238	if (devc->data_source == DATA_SOURCE_LIVE)
	239	*data = g_variant_new_string("Live");
	240	else
	241	*data = g_variant_new_string("Memory");
	242	break;
ed759a08 BV	243	default:
	244	return SR_ERR_NA;
	245	}
	246
a8806f03	247	return SR_OK;
ed759a08 BV	248	}
ed759a08 BV	249
584560f1	250	static int config_set(uint32_t key, GVariant data, const struct sr_dev_inst sdi,
53b4680f	251	const struct sr_channel_group *cg)
ed759a08	252	{
a8806f03	253	struct dev_context *devc;
bc7be4a9 BV	254	uint64_t p, q;
bc7be4a9 BV	255	unsigned int i;
a9010323	256	int tmp;
bc7be4a9	257	const char *tmp_str;
ed759a08	258
53b4680f	259	(void)cg;
d3c74a6f	260
a8806f03	261	devc = sdi->priv;
ed759a08	262	switch (key) {
a8806f03 BV	263	case SR_CONF_LIMIT_SAMPLES:
	264	devc->limit_samples = g_variant_get_uint64(data);
	265	sr_dbg("Setting sample limit to %" PRIu64 ".",
	266	devc->limit_samples);
	267	break;
bc7be4a9 BV	268	case SR_CONF_SAMPLE_INTERVAL:
bc7be4a9 BV	269	g_variant_get(data, "(tt)", &p, &q);
df035528 BV	270	for (i = 0; i < ARRAY_SIZE(kecheng_kc_330b_sample_intervals); i++) {
df035528 BV	271	if (kecheng_kc_330b_sample_intervals[i][0] != p \|\| kecheng_kc_330b_sample_intervals[i][1] != q)
bc7be4a9 BV	272	continue;
bc7be4a9 BV	273	devc->sample_interval = i;
85ed4ab3	274	devc->config_dirty = TRUE;
bc7be4a9 BV	275	break;
bc7be4a9 BV	276	}
df035528	277	if (i == ARRAY_SIZE(kecheng_kc_330b_sample_intervals))
a9010323	278	return SR_ERR_ARG;
bc7be4a9 BV	279	break;
	280	case SR_CONF_SPL_WEIGHT_FREQ:
	281	tmp_str = g_variant_get_string(data, NULL);
	282	if (!strcmp(tmp_str, "A"))
	283	tmp = SR_MQFLAG_SPL_FREQ_WEIGHT_A;
	284	else if (!strcmp(tmp_str, "C"))
	285	tmp = SR_MQFLAG_SPL_FREQ_WEIGHT_C;
	286	else
	287	return SR_ERR_ARG;
	288	devc->mqflags &= ~(SR_MQFLAG_SPL_FREQ_WEIGHT_A \| SR_MQFLAG_SPL_FREQ_WEIGHT_C);
	289	devc->mqflags \|= tmp;
85ed4ab3	290	devc->config_dirty = TRUE;
bc7be4a9 BV	291	break;
	292	case SR_CONF_SPL_WEIGHT_TIME:
	293	tmp_str = g_variant_get_string(data, NULL);
	294	if (!strcmp(tmp_str, "F"))
	295	tmp = SR_MQFLAG_SPL_TIME_WEIGHT_F;
	296	else if (!strcmp(tmp_str, "S"))
	297	tmp = SR_MQFLAG_SPL_TIME_WEIGHT_S;
	298	else
	299	return SR_ERR_ARG;
	300	devc->mqflags &= ~(SR_MQFLAG_SPL_TIME_WEIGHT_F \| SR_MQFLAG_SPL_TIME_WEIGHT_S);
	301	devc->mqflags \|= tmp;
85ed4ab3	302	devc->config_dirty = TRUE;
bc7be4a9 BV	303	break;
	304	case SR_CONF_DATA_SOURCE:
	305	tmp_str = g_variant_get_string(data, NULL);
	306	if (!strcmp(tmp_str, "Live"))
	307	devc->data_source = DATA_SOURCE_LIVE;
	308	else if (!strcmp(tmp_str, "Memory"))
	309	devc->data_source = DATA_SOURCE_MEMORY;
	310	else
	311	return SR_ERR;
85ed4ab3	312	devc->config_dirty = TRUE;
bc7be4a9	313	break;
ed759a08	314	default:
a9010323	315	return SR_ERR_NA;
ed759a08 BV	316	}
ed759a08 BV	317
a9010323	318	return SR_OK;
ed759a08 BV	319	}
ed759a08 BV	320
584560f1	321	static int config_list(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
53b4680f	322	const struct sr_channel_group *cg)
ed759a08	323	{
ed759a08	324	switch (key) {
a8806f03	325	case SR_CONF_DEVICE_OPTIONS:
05199c0a	326	return STD_CONFIG_LIST(key, data, sdi, cg, NULL, drvopts, devopts);
bc7be4a9	327	case SR_CONF_SAMPLE_INTERVAL:
db944f16 UH	328	*data = std_gvar_tuple_array(&kecheng_kc_330b_sample_intervals,
db944f16 UH	329	ARRAY_SIZE(kecheng_kc_330b_sample_intervals));
bc7be4a9 BV	330	break;
bc7be4a9 BV	331	case SR_CONF_SPL_WEIGHT_FREQ:
53012da6	332	*data = g_variant_new_strv(ARRAY_AND_SIZE(weight_freq));
bc7be4a9 BV	333	break;
bc7be4a9 BV	334	case SR_CONF_SPL_WEIGHT_TIME:
53012da6	335	*data = g_variant_new_strv(ARRAY_AND_SIZE(weight_time));
bc7be4a9 BV	336	break;
bc7be4a9 BV	337	case SR_CONF_DATA_SOURCE:
53012da6	338	*data = g_variant_new_strv(ARRAY_AND_SIZE(data_sources));
bc7be4a9	339	break;
ed759a08 BV	340	default:
	341	return SR_ERR_NA;
	342	}
	343
a8806f03	344	return SR_OK;
ed759a08 BV	345	}
ed759a08 BV	346
695dc859	347	static int dev_acquisition_start(const struct sr_dev_inst *sdi)
ed759a08	348	{
4f840ce9	349	struct sr_dev_driver *di = sdi->driver;
bc7be4a9 BV	350	struct drv_context *drvc;
bc7be4a9 BV	351	struct dev_context *devc;
85ed4ab3 BV	352	struct sr_datafeed_packet packet;
	353	struct sr_datafeed_meta meta;
	354	struct sr_config *src;
bc7be4a9	355	struct sr_usb_dev_inst *usb;
85ed4ab3	356	GVariant gvar, rational[2];
85ed4ab3	357	const uint64_t *si;
7f22cd95	358	int req_len, buf_len, len, ret;
85ed4ab3	359	unsigned char buf[9];
ed759a08	360
41812aca	361	drvc = di->context;
bc7be4a9 BV	362	devc = sdi->priv;
	363	usb = sdi->conn;
	364
bc7be4a9 BV	365	devc->num_samples = 0;
bc7be4a9 BV	366
bee2b016	367	std_session_send_df_header(sdi);
85ed4ab3	368
f336618c	369	if (devc->data_source == DATA_SOURCE_LIVE) {
85ed4ab3 BV	370	/* Force configuration. */
	371	kecheng_kc_330b_configure(sdi);
	372
f336618c BV	373	if (kecheng_kc_330b_status_get(sdi, &ret) != SR_OK)
f336618c BV	374	return SR_ERR;
f336618c BV	375	if (ret != DEVICE_ACTIVE) {
	376	sr_err("Device is inactive");
	377	/* Still continue though, since the device will
	378	* just return 30.0 until the user hits the button
	379	* on the device -- and then start feeding good
	380	* samples back. */
	381	}
85ed4ab3 BV	382	} else {
	383	if (kecheng_kc_330b_log_info_get(sdi, buf) != SR_OK)
	384	return SR_ERR;
7f22cd95 BV	385	devc->mqflags = buf[4] ? SR_MQFLAG_SPL_TIME_WEIGHT_S : SR_MQFLAG_SPL_TIME_WEIGHT_F;
7f22cd95 BV	386	devc->mqflags \|= buf[5] ? SR_MQFLAG_SPL_FREQ_WEIGHT_C : SR_MQFLAG_SPL_FREQ_WEIGHT_A;
85ed4ab3 BV	387	devc->stored_samples = (buf[7] << 8) \| buf[8];
	388	if (devc->stored_samples == 0) {
	389	/* Notify frontend of empty log by sending start/end packets. */
bee2b016	390	std_session_send_df_end(sdi);
85ed4ab3 BV	391	return SR_OK;
	392	}
	393
	394	if (devc->limit_samples && devc->limit_samples < devc->stored_samples)
	395	devc->stored_samples = devc->limit_samples;
	396
	397	si = kecheng_kc_330b_sample_intervals[buf[1]];
	398	rational[0] = g_variant_new_uint64(si[0]);
	399	rational[1] = g_variant_new_uint64(si[1]);
	400	gvar = g_variant_new_tuple(rational, 2);
	401	src = sr_config_new(SR_CONF_SAMPLE_INTERVAL, gvar);
	402	packet.type = SR_DF_META;
	403	packet.payload = &meta;
	404	meta.config = g_slist_append(NULL, src);
695dc859	405	sr_session_send(sdi, &packet);
85ed4ab3	406	g_free(src);
f336618c BV	407	}
f336618c BV	408
df035528 BV	409	if (!(devc->xfer = libusb_alloc_transfer(0)))
	410	return SR_ERR;
	411
102f1239	412	usb_source_add(sdi->session, drvc->sr_ctx, 10,
6c60facc	413	kecheng_kc_330b_handle_events, (void *)sdi);
bc7be4a9	414
85ed4ab3 BV	415	if (devc->data_source == DATA_SOURCE_LIVE) {
	416	buf[0] = CMD_GET_LIVE_SPL;
	417	buf_len = 1;
	418	devc->state = LIVE_SPL_WAIT;
	419	devc->last_live_request = g_get_monotonic_time() / 1000;
	420	req_len = 3;
	421	} else {
	422	buf[0] = CMD_GET_LOG_DATA;
	423	buf[1] = 0;
	424	buf[2] = 0;
	425	buf_len = 4;
	426	devc->state = LOG_DATA_WAIT;
	427	if (devc->stored_samples < 63)
	428	buf[3] = devc->stored_samples;
	429	else
	430	buf[3] = 63;
	431	/* Command ack byte + 2 bytes per sample. */
	432	req_len = 1 + buf[3] * 2;
	433	}
	434
	435	ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, buf, buf_len, &len, 5);
bc7be4a9 BV	436	if (ret != 0 \|\| len != 1) {
bc7be4a9 BV	437	sr_dbg("Failed to start acquisition: %s", libusb_error_name(ret));
df035528 BV	438	libusb_free_transfer(devc->xfer);
	439	return SR_ERR;
	440	}
df035528 BV	441
df035528 BV	442	libusb_fill_bulk_transfer(devc->xfer, usb->devhdl, EP_IN, devc->buf,
85ed4ab3	443	req_len, kecheng_kc_330b_receive_transfer, (void *)sdi, 15);
df035528 BV	444	if (libusb_submit_transfer(devc->xfer) != 0) {
df035528 BV	445	libusb_free_transfer(devc->xfer);
bc7be4a9 BV	446	return SR_ERR;
bc7be4a9 BV	447	}
ed759a08 BV	448
	449	return SR_OK;
	450	}
	451
695dc859	452	static int dev_acquisition_stop(struct sr_dev_inst *sdi)
ed759a08	453	{
85ed4ab3 BV	454	struct dev_context *devc;
85ed4ab3 BV	455
df035528 BV	456	/* Signal USB transfer handler to clean up and stop. */
df035528 BV	457	sdi->status = SR_ST_STOPPING;
ed759a08	458
85ed4ab3 BV	459	devc = sdi->priv;
	460	if (devc->data_source == DATA_SOURCE_MEMORY && devc->config_dirty) {
	461	/* The protocol doesn't have a command to clear stored data;
	462	* it clears it whenever new configuration is set. That means
	463	* we can't just configure the device any time we want when
	464	* it's in DATA_SOURCE_MEMORY mode. The only safe time to do
	465	* it is now, when we're sure we've pulled in all the stored
	466	* data. */
	467	kecheng_kc_330b_configure(sdi);
	468	}
	469
ed759a08 BV	470	return SR_OK;
	471	}
	472
dd5c48a6	473	static struct sr_dev_driver kecheng_kc_330b_driver_info = {
ed759a08 BV	474	.name = "kecheng-kc-330b",
	475	.longname = "Kecheng KC-330B",
	476	.api_version = 1,
c2fdcc25	477	.init = std_init,
700d6b64	478	.cleanup = std_cleanup,
ed759a08	479	.scan = scan,
c01bf34c	480	.dev_list = std_dev_list,
f778bf02	481	.dev_clear = std_dev_clear,
ed759a08 BV	482	.config_get = config_get,
	483	.config_set = config_set,
	484	.config_list = config_list,
	485	.dev_open = dev_open,
	486	.dev_close = dev_close,
	487	.dev_acquisition_start = dev_acquisition_start,
	488	.dev_acquisition_stop = dev_acquisition_stop,
41812aca	489	.context = NULL,
ed759a08	490	};
dd5c48a6	491	SR_REGISTER_DEV_DRIVER(kecheng_kc_330b_driver_info);