[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 <string.h>
#include "protocol.h"

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

static const uint32_t devopts[] = {
	SR_CONF_SOUNDLEVELMETER,
	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",
};

SR_PRIV struct sr_dev_driver kecheng_kc_330b_driver_info;

static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx)
{
	return std_init(sr_ctx, di, LOG_PREFIX);
}

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;
	drvc->instances = NULL;

	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->driver = di;
			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? */

			drvc->instances = g_slist_append(drvc->instances, sdi);
			devices = g_slist_append(devices, sdi);
		}
		g_slist_free(usb_devices);
	} else
		g_slist_free_full(usb_devices, g_free);

	return devices;
}

static GSList *dev_list(const struct sr_dev_driver *di)
{
	return ((struct drv_context *)(di->context))->instances;
}

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

	if (!(drvc = di->context)) {
		sr_err("Driver was not initialized.");
		return SR_ERR;
	}

	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;
	}
	sdi->status = SR_ST_ACTIVE;

	return ret;
}

static int dev_close(struct sr_dev_inst *sdi)
{
	struct sr_dev_driver *di = sdi->driver;
	struct dev_context *devc;
	struct sr_usb_dev_inst *usb;

	if (!di->context) {
		sr_err("Driver was not initialized.");
		return SR_ERR;
	}

	usb = sdi->conn;

	if (!usb->devhdl)
		/*  Nothing to do. */
		return SR_OK;

	/* 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;
	sdi->status = SR_ST_INACTIVE;

	return SR_OK;
}

static int cleanup(const struct sr_dev_driver *di)
{
	int ret;
	struct drv_context *drvc;

	if (!(drvc = di->context))
		/* Can get called on an unused driver, doesn't matter. */
		return SR_OK;

	ret = std_dev_clear(di, NULL);
	g_free(drvc);

	return ret;
}

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 sr_dev_driver *di = sdi->driver;
	struct dev_context *devc;
	uint64_t p, q;
	unsigned int i;
	int tmp, ret;
	const char *tmp_str;

	(void)cg;

	if (sdi->status != SR_ST_ACTIVE)
		return SR_ERR_DEV_CLOSED;

	if (!di->context) {
		sr_err("Driver was not initialized.");
		return SR_ERR;
	}

	devc = sdi->priv;
	ret = SR_OK;
	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))
			ret = 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:
		ret = SR_ERR_NA;
	}

	return ret;
}

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

	(void)sdi;
	(void)cg;

	switch (key) {
	case SR_CONF_DEVICE_OPTIONS:
		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
				devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
		break;
	case SR_CONF_SAMPLE_INTERVAL:
		g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
		for (i = 0; i < ARRAY_SIZE(kecheng_kc_330b_sample_intervals); i++) {
			rational[0] = g_variant_new_uint64(kecheng_kc_330b_sample_intervals[i][0]);
			rational[1] = g_variant_new_uint64(kecheng_kc_330b_sample_intervals[i][1]);
			tuple = g_variant_new_tuple(rational, 2);
			g_variant_builder_add_value(&gvb, tuple);
		}
		*data = g_variant_builder_end(&gvb);
		break;
	case SR_CONF_SPL_WEIGHT_FREQ:
		*data = g_variant_new_strv(weight_freq, ARRAY_SIZE(weight_freq));
		break;
	case SR_CONF_SPL_WEIGHT_TIME:
		*data = g_variant_new_strv(weight_time, ARRAY_SIZE(weight_time));
		break;
	case SR_CONF_DATA_SOURCE:
		*data = g_variant_new_strv(data_sources, ARRAY_SIZE(data_sources));
		break;
	default:
		return SR_ERR_NA;
	}

	return SR_OK;
}

static int dev_acquisition_start(const struct sr_dev_inst *sdi,
		void *cb_data)
{
	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];

	if (sdi->status != SR_ST_ACTIVE)
		return SR_ERR_DEV_CLOSED;

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

	devc->cb_data = cb_data;
	devc->num_samples = 0;

	/* Send header packet to the session bus. */
	std_session_send_df_header(cb_data, LOG_PREFIX);

	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. */
			packet.type = SR_DF_END;
			sr_session_send(cb_data, &packet);
			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(devc->cb_data, &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, void *cb_data)
{
	struct dev_context *devc;

	(void)cb_data;

	if (sdi->status != SR_ST_ACTIVE)
		return SR_ERR_DEV_CLOSED;

	/* 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;
}

SR_PRIV struct sr_dev_driver kecheng_kc_330b_driver_info = {
	.name = "kecheng-kc-330b",
	.longname = "Kecheng KC-330B",
	.api_version = 1,
	.init = init,
	.cleanup = cleanup,
	.scan = scan,
	.dev_list = dev_list,
	.dev_clear = NULL,
	.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,
};
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
bc7be4a9	20	#include <string.h>
ed759a08 BV	21	#include "protocol.h"
ed759a08 BV	22
a8806f03 BV	23	#define USB_CONN "1041.8101"
	24	#define VENDOR "Kecheng"
	25	#define USB_INTERFACE 0
a8806f03	26
f254bc4b	27	static const uint32_t devopts[] = {
a8806f03	28	SR_CONF_SOUNDLEVELMETER,
a8806f03	29	SR_CONF_CONTINUOUS,
5827f61b BV	30	SR_CONF_LIMIT_SAMPLES \| SR_CONF_GET \| SR_CONF_SET,
	31	SR_CONF_SAMPLE_INTERVAL \| SR_CONF_GET \| SR_CONF_SET \| SR_CONF_LIST,
	32	SR_CONF_DATALOG \| SR_CONF_GET,
	33	SR_CONF_SPL_WEIGHT_FREQ \| SR_CONF_GET \| SR_CONF_SET \| SR_CONF_LIST,
	34	SR_CONF_SPL_WEIGHT_TIME \| SR_CONF_GET \| SR_CONF_SET \| SR_CONF_LIST,
	35	SR_CONF_DATA_SOURCE \| SR_CONF_GET \| SR_CONF_SET \| SR_CONF_LIST,
bc7be4a9 BV	36	};
bc7be4a9 BV	37
df035528	38	SR_PRIV const uint64_t kecheng_kc_330b_sample_intervals[][2] = {
bc7be4a9 BV	39	{ 1, 8 },
	40	{ 1, 2 },
	41	{ 1, 1 },
	42	{ 2, 1 },
	43	{ 5, 1 },
	44	{ 10, 1 },
	45	{ 60, 1 },
	46	};
	47
	48	static const char *weight_freq[] = {
	49	"A",
	50	"C",
	51	};
	52
	53	static const char *weight_time[] = {
	54	"F",
	55	"S",
	56	};
	57
	58	static const char *data_sources[] = {
	59	"Live",
	60	"Memory",
a8806f03 BV	61	};
a8806f03 BV	62
ed759a08	63	SR_PRIV struct sr_dev_driver kecheng_kc_330b_driver_info;
ed759a08	64
4f840ce9	65	static int init(struct sr_dev_driver di, struct sr_context sr_ctx)
ed759a08 BV	66	{
	67	return std_init(sr_ctx, di, LOG_PREFIX);
	68	}
	69
4f840ce9 ML	70	static int scan_kecheng(struct sr_dev_driver *di,
4f840ce9 ML	71	struct sr_usb_dev_inst usb, char *model)
a8806f03 BV	72	{
	73	struct drv_context *drvc;
	74	int len, ret;
	75	unsigned char cmd, buf[32];
	76
41812aca	77	drvc = di->context;
a8806f03 BV	78	if (sr_usb_open(drvc->sr_ctx->libusb_ctx, usb) != SR_OK)
	79	return SR_ERR;
	80
	81	cmd = CMD_IDENTIFY;
	82	ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, &cmd, 1, &len, 5);
	83	if (ret != 0) {
	84	libusb_close(usb->devhdl);
	85	sr_dbg("Failed to send Identify command: %s", libusb_error_name(ret));
	86	return SR_ERR;
	87	}
	88
	89	ret = libusb_bulk_transfer(usb->devhdl, EP_IN, buf, 32, &len, 10);
	90	if (ret != 0) {
	91	libusb_close(usb->devhdl);
	92	sr_dbg("Failed to receive response: %s", libusb_error_name(ret));
	93	return SR_ERR;
	94	}
	95
	96	libusb_close(usb->devhdl);
	97	usb->devhdl = NULL;
	98
	99	if (len < 2 \|\| buf[0] != (CMD_IDENTIFY \| 0x80) \|\| buf[1] > 30) {
	100	sr_dbg("Invalid response to Identify command");
	101	return SR_ERR;
	102	}
	103
	104	buf[buf[1] + 2] = '\x0';
	105	model = g_strndup((const gchar )buf + 2, 30);
a8806f03 BV	106
	107	return SR_OK;
	108	}
	109
4f840ce9	110	static GSList scan(struct sr_dev_driver di, GSList *options)
ed759a08 BV	111	{
ed759a08 BV	112	struct drv_context *drvc;
a8806f03 BV	113	struct dev_context *devc;
a8806f03 BV	114	struct sr_dev_inst *sdi;
a8806f03 BV	115	GSList usb_devices, devices, *l;
a8806f03 BV	116	char *model;
ed759a08 BV	117
	118	(void)options;
	119
41812aca	120	drvc = di->context;
ed759a08 BV	121	drvc->instances = NULL;
ed759a08 BV	122
a8806f03 BV	123	devices = NULL;
	124	if ((usb_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, USB_CONN))) {
	125	/* We have a list of sr_usb_dev_inst matching the connection
	126	* string. Wrap them in sr_dev_inst and we're done. */
	127	for (l = usb_devices; l; l = l->next) {
4f840ce9	128	if (scan_kecheng(di, l->data, &model) != SR_OK)
a8806f03	129	continue;
aac29cc1	130	sdi = g_malloc0(sizeof(struct sr_dev_inst));
0af636be UH	131	sdi->status = SR_ST_INACTIVE;
	132	sdi->vendor = g_strdup(VENDOR);
	133	sdi->model = model; /* Already g_strndup()'d. */
a8806f03 BV	134	sdi->driver = di;
	135	sdi->inst_type = SR_INST_USB;
	136	sdi->conn = l->data;
5e23fcab	137	sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "SPL");
f57d8ffe	138	devc = g_malloc0(sizeof(struct dev_context));
a8806f03 BV	139	sdi->priv = devc;
a8806f03 BV	140	devc->limit_samples = 0;
bc7be4a9 BV	141	/* The protocol provides no way to read the current
	142	* settings, so we'll enforce these. */
	143	devc->sample_interval = DEFAULT_SAMPLE_INTERVAL;
	144	devc->alarm_low = DEFAULT_ALARM_LOW;
	145	devc->alarm_high = DEFAULT_ALARM_HIGH;
	146	devc->mqflags = DEFAULT_WEIGHT_TIME \| DEFAULT_WEIGHT_FREQ;
	147	devc->data_source = DEFAULT_DATA_SOURCE;
85ed4ab3	148	devc->config_dirty = FALSE;
bc7be4a9 BV	149
bc7be4a9 BV	150	/* TODO: Set date/time? */
a8806f03 BV	151
	152	drvc->instances = g_slist_append(drvc->instances, sdi);
	153	devices = g_slist_append(devices, sdi);
	154	}
	155	g_slist_free(usb_devices);
	156	} else
	157	g_slist_free_full(usb_devices, g_free);
ed759a08 BV	158
	159	return devices;
	160	}
	161
4f840ce9	162	static GSList dev_list(const struct sr_dev_driver di)
ed759a08	163	{
41812aca	164	return ((struct drv_context *)(di->context))->instances;
ed759a08 BV	165	}
ed759a08 BV	166
ed759a08 BV	167	static int dev_open(struct sr_dev_inst *sdi)
ed759a08 BV	168	{
4f840ce9	169	struct sr_dev_driver *di = sdi->driver;
a8806f03 BV	170	struct drv_context *drvc;
	171	struct sr_usb_dev_inst *usb;
	172	int ret;
	173
41812aca	174	if (!(drvc = di->context)) {
a8806f03 BV	175	sr_err("Driver was not initialized.");
	176	return SR_ERR;
	177	}
	178
	179	usb = sdi->conn;
ed759a08	180
a8806f03 BV	181	if (sr_usb_open(drvc->sr_ctx->libusb_ctx, usb) != SR_OK)
a8806f03 BV	182	return SR_ERR;
ed759a08	183
85ed4ab3 BV	184	if ((ret = libusb_set_configuration(usb->devhdl, 1))) {
	185	sr_err("Failed to set configuration: %s.", libusb_error_name(ret));
	186	return SR_ERR;
	187	}
	188
a8806f03 BV	189	if ((ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE))) {
	190	sr_err("Failed to claim interface: %s.", libusb_error_name(ret));
	191	return SR_ERR;
	192	}
ed759a08 BV	193	sdi->status = SR_ST_ACTIVE;
ed759a08 BV	194
a8806f03	195	return ret;
ed759a08 BV	196	}
	197
	198	static int dev_close(struct sr_dev_inst *sdi)
	199	{
4f840ce9	200	struct sr_dev_driver *di = sdi->driver;
85ed4ab3	201	struct dev_context *devc;
a8806f03 BV	202	struct sr_usb_dev_inst *usb;
a8806f03 BV	203
41812aca	204	if (!di->context) {
a8806f03 BV	205	sr_err("Driver was not initialized.");
	206	return SR_ERR;
	207	}
	208
	209	usb = sdi->conn;
ed759a08	210
a8806f03 BV	211	if (!usb->devhdl)
	212	/* Nothing to do. */
	213	return SR_OK;
ed759a08	214
85ed4ab3 BV	215	/* This allows a frontend to configure the device without ever
	216	* doing an acquisition step. */
	217	devc = sdi->priv;
	218	if (!devc->config_dirty)
	219	kecheng_kc_330b_configure(sdi);
	220
a8806f03 BV	221	libusb_release_interface(usb->devhdl, USB_INTERFACE);
	222	libusb_close(usb->devhdl);
	223	usb->devhdl = NULL;
ed759a08 BV	224	sdi->status = SR_ST_INACTIVE;
	225
	226	return SR_OK;
	227	}
	228
4f840ce9	229	static int cleanup(const struct sr_dev_driver *di)
ed759a08	230	{
a8806f03 BV	231	int ret;
a8806f03 BV	232	struct drv_context *drvc;
ed759a08	233
41812aca	234	if (!(drvc = di->context))
a8806f03 BV	235	/* Can get called on an unused driver, doesn't matter. */
a8806f03 BV	236	return SR_OK;
ed759a08	237
a6630742	238	ret = std_dev_clear(di, NULL);
a8806f03	239	g_free(drvc);
a8806f03 BV	240
a8806f03 BV	241	return ret;
ed759a08 BV	242	}
ed759a08 BV	243
584560f1	244	static int config_get(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
53b4680f	245	const struct sr_channel_group *cg)
ed759a08	246	{
a8806f03	247	struct dev_context *devc;
bc7be4a9 BV	248	GVariant *rational[2];
bc7be4a9 BV	249	const uint64_t *si;
ed759a08	250
53b4680f	251	(void)cg;
d3c74a6f	252
a8806f03	253	devc = sdi->priv;
ed759a08	254	switch (key) {
a8806f03 BV	255	case SR_CONF_LIMIT_SAMPLES:
	256	*data = g_variant_new_uint64(devc->limit_samples);
	257	break;
bc7be4a9	258	case SR_CONF_SAMPLE_INTERVAL:
df035528	259	si = kecheng_kc_330b_sample_intervals[devc->sample_interval];
bc7be4a9 BV	260	rational[0] = g_variant_new_uint64(si[0]);
	261	rational[1] = g_variant_new_uint64(si[1]);
	262	*data = g_variant_new_tuple(rational, 2);
	263	break;
	264	case SR_CONF_DATALOG:
85ed4ab3 BV	265	/* There really isn't a way to be sure the device is logging. */
85ed4ab3 BV	266	return SR_ERR_NA;
bc7be4a9 BV	267	break;
	268	case SR_CONF_SPL_WEIGHT_FREQ:
	269	if (devc->mqflags & SR_MQFLAG_SPL_FREQ_WEIGHT_A)
	270	*data = g_variant_new_string("A");
	271	else
	272	*data = g_variant_new_string("C");
	273	break;
	274	case SR_CONF_SPL_WEIGHT_TIME:
	275	if (devc->mqflags & SR_MQFLAG_SPL_TIME_WEIGHT_F)
	276	*data = g_variant_new_string("F");
	277	else
	278	*data = g_variant_new_string("S");
	279	break;
	280	case SR_CONF_DATA_SOURCE:
	281	if (devc->data_source == DATA_SOURCE_LIVE)
	282	*data = g_variant_new_string("Live");
	283	else
	284	*data = g_variant_new_string("Memory");
	285	break;
ed759a08 BV	286	default:
	287	return SR_ERR_NA;
	288	}
	289
a8806f03	290	return SR_OK;
ed759a08 BV	291	}
ed759a08 BV	292
584560f1	293	static int config_set(uint32_t key, GVariant data, const struct sr_dev_inst sdi,
53b4680f	294	const struct sr_channel_group *cg)
ed759a08	295	{
4f840ce9	296	struct sr_dev_driver *di = sdi->driver;
a8806f03	297	struct dev_context *devc;
bc7be4a9 BV	298	uint64_t p, q;
	299	unsigned int i;
	300	int tmp, ret;
	301	const char *tmp_str;
ed759a08	302
53b4680f	303	(void)cg;
d3c74a6f	304
ed759a08 BV	305	if (sdi->status != SR_ST_ACTIVE)
	306	return SR_ERR_DEV_CLOSED;
	307
41812aca	308	if (!di->context) {
a8806f03 BV	309	sr_err("Driver was not initialized.");
	310	return SR_ERR;
	311	}
	312
	313	devc = sdi->priv;
ed759a08 BV	314	ret = SR_OK;
ed759a08 BV	315	switch (key) {
a8806f03 BV	316	case SR_CONF_LIMIT_SAMPLES:
	317	devc->limit_samples = g_variant_get_uint64(data);
	318	sr_dbg("Setting sample limit to %" PRIu64 ".",
	319	devc->limit_samples);
	320	break;
bc7be4a9 BV	321	case SR_CONF_SAMPLE_INTERVAL:
bc7be4a9 BV	322	g_variant_get(data, "(tt)", &p, &q);
df035528 BV	323	for (i = 0; i < ARRAY_SIZE(kecheng_kc_330b_sample_intervals); i++) {
df035528 BV	324	if (kecheng_kc_330b_sample_intervals[i][0] != p \|\| kecheng_kc_330b_sample_intervals[i][1] != q)
bc7be4a9 BV	325	continue;
bc7be4a9 BV	326	devc->sample_interval = i;
85ed4ab3	327	devc->config_dirty = TRUE;
bc7be4a9 BV	328	break;
bc7be4a9 BV	329	}
df035528	330	if (i == ARRAY_SIZE(kecheng_kc_330b_sample_intervals))
bc7be4a9 BV	331	ret = SR_ERR_ARG;
	332	break;
	333	case SR_CONF_SPL_WEIGHT_FREQ:
	334	tmp_str = g_variant_get_string(data, NULL);
	335	if (!strcmp(tmp_str, "A"))
	336	tmp = SR_MQFLAG_SPL_FREQ_WEIGHT_A;
	337	else if (!strcmp(tmp_str, "C"))
	338	tmp = SR_MQFLAG_SPL_FREQ_WEIGHT_C;
	339	else
	340	return SR_ERR_ARG;
	341	devc->mqflags &= ~(SR_MQFLAG_SPL_FREQ_WEIGHT_A \| SR_MQFLAG_SPL_FREQ_WEIGHT_C);
	342	devc->mqflags \|= tmp;
85ed4ab3	343	devc->config_dirty = TRUE;
bc7be4a9 BV	344	break;
	345	case SR_CONF_SPL_WEIGHT_TIME:
	346	tmp_str = g_variant_get_string(data, NULL);
	347	if (!strcmp(tmp_str, "F"))
	348	tmp = SR_MQFLAG_SPL_TIME_WEIGHT_F;
	349	else if (!strcmp(tmp_str, "S"))
	350	tmp = SR_MQFLAG_SPL_TIME_WEIGHT_S;
	351	else
	352	return SR_ERR_ARG;
	353	devc->mqflags &= ~(SR_MQFLAG_SPL_TIME_WEIGHT_F \| SR_MQFLAG_SPL_TIME_WEIGHT_S);
	354	devc->mqflags \|= tmp;
85ed4ab3	355	devc->config_dirty = TRUE;
bc7be4a9 BV	356	break;
	357	case SR_CONF_DATA_SOURCE:
	358	tmp_str = g_variant_get_string(data, NULL);
	359	if (!strcmp(tmp_str, "Live"))
	360	devc->data_source = DATA_SOURCE_LIVE;
	361	else if (!strcmp(tmp_str, "Memory"))
	362	devc->data_source = DATA_SOURCE_MEMORY;
	363	else
	364	return SR_ERR;
85ed4ab3	365	devc->config_dirty = TRUE;
bc7be4a9	366	break;
ed759a08 BV	367	default:
	368	ret = SR_ERR_NA;
	369	}
	370
	371	return ret;
	372	}
	373
584560f1	374	static int config_list(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
53b4680f	375	const struct sr_channel_group *cg)
ed759a08	376	{
bc7be4a9 BV	377	GVariant tuple, rational[2];
	378	GVariantBuilder gvb;
	379	unsigned int i;
ed759a08 BV	380
ed759a08 BV	381	(void)sdi;
53b4680f	382	(void)cg;
ed759a08	383
ed759a08	384	switch (key) {
a8806f03	385	case SR_CONF_DEVICE_OPTIONS:
584560f1	386	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
f254bc4b	387	devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
a8806f03	388	break;
bc7be4a9 BV	389	case SR_CONF_SAMPLE_INTERVAL:
bc7be4a9 BV	390	g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
df035528 BV	391	for (i = 0; i < ARRAY_SIZE(kecheng_kc_330b_sample_intervals); i++) {
	392	rational[0] = g_variant_new_uint64(kecheng_kc_330b_sample_intervals[i][0]);
	393	rational[1] = g_variant_new_uint64(kecheng_kc_330b_sample_intervals[i][1]);
bc7be4a9 BV	394	tuple = g_variant_new_tuple(rational, 2);
	395	g_variant_builder_add_value(&gvb, tuple);
	396	}
	397	*data = g_variant_builder_end(&gvb);
	398	break;
	399	case SR_CONF_SPL_WEIGHT_FREQ:
	400	*data = g_variant_new_strv(weight_freq, ARRAY_SIZE(weight_freq));
	401	break;
	402	case SR_CONF_SPL_WEIGHT_TIME:
	403	*data = g_variant_new_strv(weight_time, ARRAY_SIZE(weight_time));
	404	break;
	405	case SR_CONF_DATA_SOURCE:
	406	*data = g_variant_new_strv(data_sources, ARRAY_SIZE(data_sources));
	407	break;
ed759a08 BV	408	default:
	409	return SR_ERR_NA;
	410	}
	411
a8806f03	412	return SR_OK;
ed759a08 BV	413	}
	414
	415	static int dev_acquisition_start(const struct sr_dev_inst *sdi,
85ed4ab3	416	void *cb_data)
ed759a08	417	{
4f840ce9	418	struct sr_dev_driver *di = sdi->driver;
bc7be4a9 BV	419	struct drv_context *drvc;
bc7be4a9 BV	420	struct dev_context *devc;
85ed4ab3 BV	421	struct sr_datafeed_packet packet;
	422	struct sr_datafeed_meta meta;
	423	struct sr_config *src;
bc7be4a9	424	struct sr_usb_dev_inst *usb;
85ed4ab3	425	GVariant gvar, rational[2];
85ed4ab3	426	const uint64_t *si;
7f22cd95	427	int req_len, buf_len, len, ret;
85ed4ab3	428	unsigned char buf[9];
ed759a08 BV	429
	430	if (sdi->status != SR_ST_ACTIVE)
	431	return SR_ERR_DEV_CLOSED;
	432
41812aca	433	drvc = di->context;
bc7be4a9 BV	434	devc = sdi->priv;
	435	usb = sdi->conn;
	436
	437	devc->cb_data = cb_data;
	438	devc->num_samples = 0;
	439
85ed4ab3 BV	440	/* Send header packet to the session bus. */
	441	std_session_send_df_header(cb_data, LOG_PREFIX);
	442
f336618c	443	if (devc->data_source == DATA_SOURCE_LIVE) {
85ed4ab3 BV	444	/* Force configuration. */
	445	kecheng_kc_330b_configure(sdi);
	446
f336618c BV	447	if (kecheng_kc_330b_status_get(sdi, &ret) != SR_OK)
f336618c BV	448	return SR_ERR;
f336618c BV	449	if (ret != DEVICE_ACTIVE) {
	450	sr_err("Device is inactive");
	451	/* Still continue though, since the device will
	452	* just return 30.0 until the user hits the button
	453	* on the device -- and then start feeding good
	454	* samples back. */
	455	}
85ed4ab3 BV	456	} else {
	457	if (kecheng_kc_330b_log_info_get(sdi, buf) != SR_OK)
	458	return SR_ERR;
7f22cd95 BV	459	devc->mqflags = buf[4] ? SR_MQFLAG_SPL_TIME_WEIGHT_S : SR_MQFLAG_SPL_TIME_WEIGHT_F;
7f22cd95 BV	460	devc->mqflags \|= buf[5] ? SR_MQFLAG_SPL_FREQ_WEIGHT_C : SR_MQFLAG_SPL_FREQ_WEIGHT_A;
85ed4ab3 BV	461	devc->stored_samples = (buf[7] << 8) \| buf[8];
	462	if (devc->stored_samples == 0) {
	463	/* Notify frontend of empty log by sending start/end packets. */
	464	packet.type = SR_DF_END;
	465	sr_session_send(cb_data, &packet);
	466	return SR_OK;
	467	}
	468
	469	if (devc->limit_samples && devc->limit_samples < devc->stored_samples)
	470	devc->stored_samples = devc->limit_samples;
	471
	472	si = kecheng_kc_330b_sample_intervals[buf[1]];
	473	rational[0] = g_variant_new_uint64(si[0]);
	474	rational[1] = g_variant_new_uint64(si[1]);
	475	gvar = g_variant_new_tuple(rational, 2);
	476	src = sr_config_new(SR_CONF_SAMPLE_INTERVAL, gvar);
	477	packet.type = SR_DF_META;
	478	packet.payload = &meta;
	479	meta.config = g_slist_append(NULL, src);
	480	sr_session_send(devc->cb_data, &packet);
	481	g_free(src);
f336618c BV	482	}
f336618c BV	483
df035528 BV	484	if (!(devc->xfer = libusb_alloc_transfer(0)))
	485	return SR_ERR;
	486
102f1239	487	usb_source_add(sdi->session, drvc->sr_ctx, 10,
6c60facc	488	kecheng_kc_330b_handle_events, (void *)sdi);
bc7be4a9	489
85ed4ab3 BV	490	if (devc->data_source == DATA_SOURCE_LIVE) {
	491	buf[0] = CMD_GET_LIVE_SPL;
	492	buf_len = 1;
	493	devc->state = LIVE_SPL_WAIT;
	494	devc->last_live_request = g_get_monotonic_time() / 1000;
	495	req_len = 3;
	496	} else {
	497	buf[0] = CMD_GET_LOG_DATA;
	498	buf[1] = 0;
	499	buf[2] = 0;
	500	buf_len = 4;
	501	devc->state = LOG_DATA_WAIT;
	502	if (devc->stored_samples < 63)
	503	buf[3] = devc->stored_samples;
	504	else
	505	buf[3] = 63;
	506	/* Command ack byte + 2 bytes per sample. */
	507	req_len = 1 + buf[3] * 2;
	508	}
	509
	510	ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, buf, buf_len, &len, 5);
bc7be4a9 BV	511	if (ret != 0 \|\| len != 1) {
bc7be4a9 BV	512	sr_dbg("Failed to start acquisition: %s", libusb_error_name(ret));
df035528 BV	513	libusb_free_transfer(devc->xfer);
	514	return SR_ERR;
	515	}
df035528 BV	516
df035528 BV	517	libusb_fill_bulk_transfer(devc->xfer, usb->devhdl, EP_IN, devc->buf,
85ed4ab3	518	req_len, kecheng_kc_330b_receive_transfer, (void *)sdi, 15);
df035528 BV	519	if (libusb_submit_transfer(devc->xfer) != 0) {
df035528 BV	520	libusb_free_transfer(devc->xfer);
bc7be4a9 BV	521	return SR_ERR;
bc7be4a9 BV	522	}
ed759a08 BV	523
	524	return SR_OK;
	525	}
	526
	527	static int dev_acquisition_stop(struct sr_dev_inst sdi, void cb_data)
	528	{
85ed4ab3 BV	529	struct dev_context *devc;
85ed4ab3 BV	530
ed759a08 BV	531	(void)cb_data;
	532
	533	if (sdi->status != SR_ST_ACTIVE)
	534	return SR_ERR_DEV_CLOSED;
	535
df035528 BV	536	/* Signal USB transfer handler to clean up and stop. */
df035528 BV	537	sdi->status = SR_ST_STOPPING;
ed759a08	538
85ed4ab3 BV	539	devc = sdi->priv;
	540	if (devc->data_source == DATA_SOURCE_MEMORY && devc->config_dirty) {
	541	/* The protocol doesn't have a command to clear stored data;
	542	* it clears it whenever new configuration is set. That means
	543	* we can't just configure the device any time we want when
	544	* it's in DATA_SOURCE_MEMORY mode. The only safe time to do
	545	* it is now, when we're sure we've pulled in all the stored
	546	* data. */
	547	kecheng_kc_330b_configure(sdi);
	548	}
	549
ed759a08 BV	550	return SR_OK;
	551	}
	552
	553	SR_PRIV struct sr_dev_driver kecheng_kc_330b_driver_info = {
	554	.name = "kecheng-kc-330b",
	555	.longname = "Kecheng KC-330B",
	556	.api_version = 1,
	557	.init = init,
	558	.cleanup = cleanup,
	559	.scan = scan,
	560	.dev_list = dev_list,
a6630742	561	.dev_clear = NULL,
ed759a08 BV	562	.config_get = config_get,
	563	.config_set = config_set,
	564	.config_list = config_list,
	565	.dev_open = dev_open,
	566	.dev_close = dev_close,
	567	.dev_acquisition_start = dev_acquisition_start,
	568	.dev_acquisition_stop = dev_acquisition_stop,
41812aca	569	.context = NULL,
ed759a08	570	};