[libsigrok.git] / src / hardware / testo / api.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2014 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 SERIALCOMM "115200/8n1"
static int dev_acquisition_stop(struct sr_dev_inst *sdi);

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

static const uint32_t devopts[] = {
	SR_CONF_MULTIMETER,
	SR_CONF_CONTINUOUS,
	SR_CONF_LIMIT_SAMPLES | SR_CONF_SET | SR_CONF_GET,
	SR_CONF_LIMIT_MSEC | SR_CONF_SET | SR_CONF_GET,
};

static const uint8_t TESTO_x35_REQUEST[] = { 0x12, 0, 0, 0, 1, 1, 0x55, 0xd1, 0xb7 };

static const struct testo_model models[] = {
	{ "435", 9, TESTO_x35_REQUEST },
};

static GSList *scan(struct sr_dev_driver *di, GSList *options)
{
	struct drv_context *drvc;
	struct dev_context *devc;
	struct sr_config *src;
	struct sr_dev_inst *sdi;
	struct sr_usb_dev_inst *usb;
	struct libusb_device_descriptor des;
	libusb_device **devlist;
	struct libusb_device_handle *hdl;
	GSList *conn_devices, *devices, *l;
	int ret, i;
	const char *str;
	char manufacturer[64], product[64], connection_id[64];

	devices = NULL;
	drvc = di->context;

	conn_devices = NULL;
	for (l = options; l; l = l->next) {
		src = l->data;
		if (src->key != SR_CONF_CONN)
			continue;
		str = g_variant_get_string(src->data, NULL);
		conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, str);
	}

	libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
	for (i = 0; devlist[i]; i++) {
		if (conn_devices) {
			usb = NULL;
			for (l = conn_devices; l; l = l->next) {
				usb = l->data;
				if (usb->bus == libusb_get_bus_number(devlist[i])
					&& usb->address == libusb_get_device_address(devlist[i]))
					break;
			}
			if (!l)
				/* This device matched none of the ones that
				 * matched the conn specification. */
				continue;
		}

		libusb_get_device_descriptor(devlist[i], &des);

		if ((ret = libusb_open(devlist[i], &hdl)) < 0)
			continue;

		manufacturer[0] = product[0] = '\0';
		if (des.iManufacturer && (ret = libusb_get_string_descriptor_ascii(
				hdl, des.iManufacturer, (unsigned char *) manufacturer,
				sizeof(manufacturer))) < 0) {
			sr_warn("Failed to get manufacturer string descriptor: %s.",
				libusb_error_name(ret));
		}
		if (des.iProduct && (ret = libusb_get_string_descriptor_ascii(
				hdl, des.iProduct, (unsigned char *) product,
				sizeof(product))) < 0) {
			sr_warn("Failed to get product string descriptor: %s.",
				libusb_error_name(ret));
		}
		libusb_close(hdl);

		if (strncmp(manufacturer, "testo", 5))
			continue;

		usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));

		/* Hardcode the 435 for now.*/
		if (strcmp(product, "testo 435/635/735"))
			continue;

		sdi = g_malloc0(sizeof(struct sr_dev_inst));
		sdi->status = SR_ST_INACTIVE;
		sdi->vendor = g_strdup("Testo");
		sdi->model = g_strdup("435/635/735");
		sdi->driver = di;
		sdi->inst_type = SR_INST_USB;
		sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]),
				libusb_get_device_address(devlist[i]), NULL);
		sdi->connection_id = g_strdup(connection_id);
		devc = g_malloc(sizeof(struct dev_context));
		devc->model = &models[0];
		sr_sw_limits_init(&devc->sw_limits);
		sdi->priv = devc;
		if (testo_probe_channels(sdi) != SR_OK)
			continue;
		drvc->instances = g_slist_append(drvc->instances, sdi);
		devices = g_slist_append(devices, sdi);
	}
	libusb_free_device_list(devlist, 1);
	g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);

	return 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;

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

	if (libusb_has_capability(LIBUSB_CAP_SUPPORTS_DETACH_KERNEL_DRIVER)) {
		if (libusb_kernel_driver_active(usb->devhdl, 0) == 1) {
			if ((ret = libusb_detach_kernel_driver(usb->devhdl, 0)) < 0) {
				sr_err("Failed to detach kernel driver: %s.",
					   libusb_error_name(ret));
				return SR_ERR;
			}
		}
	}

	if ((ret = libusb_claim_interface(usb->devhdl, 0))) {
		sr_err("Failed to claim interface: %s.", libusb_error_name(ret));
		return SR_ERR;
	}
	sdi->status = SR_ST_ACTIVE;

	return SR_OK;
}

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

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

	libusb_release_interface(usb->devhdl, 0);
	libusb_close(usb->devhdl);
	usb->devhdl = NULL;
	sdi->status = SR_ST_INACTIVE;

	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 = sdi->priv;
	struct sr_usb_dev_inst *usb;
	char str[128];

	(void)cg;

	switch (key) {
	case SR_CONF_CONN:
		if (!sdi || !sdi->conn)
			return SR_ERR_ARG;
		usb = sdi->conn;
		snprintf(str, 128, "%d.%d", usb->bus, usb->address);
		*data = g_variant_new_string(str);
		break;
	case SR_CONF_LIMIT_MSEC:
	case SR_CONF_LIMIT_SAMPLES:
		return sr_sw_limits_config_get(&devc->sw_limits, key, data);
	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 = sdi->priv;

	(void)cg;

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

	return sr_sw_limits_config_set(&devc->sw_limits, key, data);
}

static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
		const struct sr_channel_group *cg)
{
	(void)sdi;
	(void)cg;

	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:
		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
				devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
		break;
	default:
		return SR_ERR_NA;
	}

	return SR_OK;
}

static void receive_data(struct sr_dev_inst *sdi, unsigned char *data, int len)
{
	struct dev_context *devc;
	int packet_size;
	uint16_t crc;

	devc = sdi->priv;

	if (devc->reply_size + len > MAX_REPLY_SIZE) {
		/* Something went very wrong. */
		sr_dbg("Receive buffer overrun.");
		devc->reply_size = 0;
		return;
	}

	memcpy(devc->reply + devc->reply_size, data, len);
	devc->reply_size += len;
	/* Sixth byte contains the length of the packet. */
	if (devc->reply_size < 7)
		return;

	packet_size = 7 + devc->reply[6] * 7 + 2;
	if (devc->reply_size < packet_size)
		return;

	if (!testo_check_packet_prefix(devc->reply, devc->reply_size))
		return;

	crc = crc16_mcrf4xx(0xffff, devc->reply, devc->reply_size - 2);
	if (crc == RL16(&devc->reply[devc->reply_size - 2])) {
		testo_receive_packet(sdi);
		sr_sw_limits_update_samples_read(&devc->sw_limits, 1);
	} else {
		sr_dbg("Packet has invalid CRC.");
	}

	devc->reply_size = 0;
	if (sr_sw_limits_check(&devc->sw_limits))
		dev_acquisition_stop(sdi);
	else
		testo_request_packet(sdi);

}

SR_PRIV void LIBUSB_CALL receive_transfer(struct libusb_transfer *transfer)
{
	struct dev_context *devc;
	struct sr_dev_inst *sdi;
	int ret;

	sdi = transfer->user_data;
	devc = sdi->priv;
	if (transfer == devc->out_transfer)
		/* Just the command acknowledgement. */
		return;

	if (transfer->status == LIBUSB_TRANSFER_NO_DEVICE) {
		/* USB device was unplugged. */
		dev_acquisition_stop(sdi);
	} else if (transfer->status == LIBUSB_TRANSFER_COMPLETED) {
		/* First two bytes in any transfer are FTDI status bytes. */
		if (transfer->actual_length > 2)
			receive_data(sdi, transfer->buffer + 2, transfer->actual_length - 2);
	}
	/* Anything else is either an error or a timeout, which is fine:
	 * we were just going to send another transfer request anyway. */

	if (sdi->status == SR_ST_ACTIVE) {
		if ((ret = libusb_submit_transfer(transfer) != 0)) {
			sr_err("Unable to resubmit transfer: %s.",
			       libusb_error_name(ret));
			g_free(transfer->buffer);
			libusb_free_transfer(transfer);
			dev_acquisition_stop(sdi);
		}
	} else {
		/* This was the last transfer we're going to receive, so
		 * clean up now. */
		g_free(transfer->buffer);
		libusb_free_transfer(transfer);
	}
}

static int handle_events(int fd, int revents, void *cb_data)
{
	struct sr_dev_driver *di;
	struct dev_context *devc;
	struct drv_context *drvc;
	struct sr_dev_inst *sdi;
	struct timeval tv;

	(void)fd;
	(void)revents;

	sdi = cb_data;
	devc = sdi->priv;
	di = sdi->driver;
	drvc = di->context;

	if (sr_sw_limits_check(&devc->sw_limits))
		dev_acquisition_stop(sdi);

	if (sdi->status == SR_ST_STOPPING) {
		usb_source_remove(sdi->session, drvc->sr_ctx);
		dev_close(sdi);
		std_session_send_df_end(sdi, LOG_PREFIX);
	}

	memset(&tv, 0, sizeof(struct timeval));
	libusb_handle_events_timeout_completed(drvc->sr_ctx->libusb_ctx, &tv,
			NULL);

	return TRUE;
}

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_usb_dev_inst *usb;
	struct libusb_transfer *transfer;
	int ret;
	unsigned char *buf;

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


	devc = sdi->priv;
	usb = sdi->conn;
	devc->reply_size = 0;

	std_session_send_df_header(sdi, LOG_PREFIX);

	usb_source_add(sdi->session, drvc->sr_ctx, 100,
			handle_events, (void *)sdi);

	if (testo_set_serial_params(usb) != SR_OK)
		return SR_ERR;

	devc->out_transfer = libusb_alloc_transfer(0);
	if (testo_request_packet(sdi) != SR_OK)
		return SR_ERR;

	buf = g_malloc(MAX_REPLY_SIZE);
	transfer = libusb_alloc_transfer(0);
	libusb_fill_bulk_transfer(transfer, usb->devhdl, EP_IN, buf,
			MAX_REPLY_SIZE, receive_transfer, (void *)sdi, 100);
	if ((ret = libusb_submit_transfer(transfer) != 0)) {
		sr_err("Unable to submit transfer: %s.", libusb_error_name(ret));
		libusb_free_transfer(transfer);
		g_free(buf);
		return SR_ERR;
	}
	devc->reply_size = 0;

	sr_sw_limits_acquisition_start(&devc->sw_limits);

	return SR_OK;
}

static int dev_acquisition_stop(struct sr_dev_inst *sdi)
{
	if (sdi->status != SR_ST_ACTIVE)
		return SR_ERR_DEV_CLOSED;

	sdi->status = SR_ST_STOPPING;

	return SR_OK;
}

static struct sr_dev_driver testo_driver_info = {
	.name = "testo",
	.longname = "Testo",
	.api_version = 1,
	.init = std_init,
	.cleanup = std_cleanup,
	.scan = scan,
	.dev_list = std_dev_list,
	.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(testo_driver_info);
Commit	Line	Data
0acdd793 BV	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2014 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>
6dcb9723	21	#include <string.h>
0acdd793 BV	22	#include "protocol.h"
0acdd793 BV	23
6dcb9723	24	#define SERIALCOMM "115200/8n1"
695dc859	25	static int dev_acquisition_stop(struct sr_dev_inst *sdi);
6dcb9723	26
584560f1	27	static const uint32_t scanopts[] = {
6dcb9723 BV	28	SR_CONF_CONN,
	29	};
	30
584560f1	31	static const uint32_t devopts[] = {
6dcb9723	32	SR_CONF_MULTIMETER,
6dcb9723	33	SR_CONF_CONTINUOUS,
91b77e6b LPC	34	SR_CONF_LIMIT_SAMPLES \| SR_CONF_SET \| SR_CONF_GET,
91b77e6b LPC	35	SR_CONF_LIMIT_MSEC \| SR_CONF_SET \| SR_CONF_GET,
6dcb9723 BV	36	};
6dcb9723 BV	37
329733d9 UH	38	static const uint8_t TESTO_x35_REQUEST[] = { 0x12, 0, 0, 0, 1, 1, 0x55, 0xd1, 0xb7 };
	39
	40	static const struct testo_model models[] = {
6dcb9723 BV	41	{ "435", 9, TESTO_x35_REQUEST },
6dcb9723 BV	42	};
0acdd793	43
4f840ce9	44	static GSList scan(struct sr_dev_driver di, GSList *options)
0acdd793 BV	45	{
0acdd793 BV	46	struct drv_context *drvc;
6dcb9723 BV	47	struct dev_context *devc;
	48	struct sr_config *src;
	49	struct sr_dev_inst *sdi;
	50	struct sr_usb_dev_inst *usb;
	51	struct libusb_device_descriptor des;
	52	libusb_device **devlist;
	53	struct libusb_device_handle *hdl;
	54	GSList conn_devices, devices, *l;
bde9fbd1	55	int ret, i;
6dcb9723	56	const char *str;
bde9fbd1	57	char manufacturer[64], product[64], connection_id[64];
0acdd793 BV	58
0acdd793 BV	59	devices = NULL;
41812aca	60	drvc = di->context;
0acdd793	61
6dcb9723 BV	62	conn_devices = NULL;
	63	for (l = options; l; l = l->next) {
	64	src = l->data;
	65	if (src->key != SR_CONF_CONN)
	66	continue;
	67	str = g_variant_get_string(src->data, NULL);
	68	conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, str);
	69	}
	70
	71	libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
	72	for (i = 0; devlist[i]; i++) {
	73	if (conn_devices) {
	74	usb = NULL;
	75	for (l = conn_devices; l; l = l->next) {
	76	usb = l->data;
	77	if (usb->bus == libusb_get_bus_number(devlist[i])
	78	&& usb->address == libusb_get_device_address(devlist[i]))
	79	break;
	80	}
	81	if (!l)
	82	/* This device matched none of the ones that
	83	* matched the conn specification. */
	84	continue;
	85	}
	86
2a8f2d41	87	libusb_get_device_descriptor(devlist[i], &des);
6dcb9723 BV	88
	89	if ((ret = libusb_open(devlist[i], &hdl)) < 0)
	90	continue;
	91
	92	manufacturer[0] = product[0] = '\0';
	93	if (des.iManufacturer && (ret = libusb_get_string_descriptor_ascii(
	94	hdl, des.iManufacturer, (unsigned char *) manufacturer,
	95	sizeof(manufacturer))) < 0) {
	96	sr_warn("Failed to get manufacturer string descriptor: %s.",
	97	libusb_error_name(ret));
	98	}
	99	if (des.iProduct && (ret = libusb_get_string_descriptor_ascii(
	100	hdl, des.iProduct, (unsigned char *) product,
	101	sizeof(product))) < 0) {
	102	sr_warn("Failed to get product string descriptor: %s.",
	103	libusb_error_name(ret));
	104	}
	105	libusb_close(hdl);
	106
	107	if (strncmp(manufacturer, "testo", 5))
	108	continue;
	109
bde9fbd1 SA	110	usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
bde9fbd1 SA	111
6dcb9723 BV	112	/* Hardcode the 435 for now.*/
	113	if (strcmp(product, "testo 435/635/735"))
	114	continue;
	115
aac29cc1	116	sdi = g_malloc0(sizeof(struct sr_dev_inst));
0af636be UH	117	sdi->status = SR_ST_INACTIVE;
	118	sdi->vendor = g_strdup("Testo");
	119	sdi->model = g_strdup("435/635/735");
6dcb9723 BV	120	sdi->driver = di;
	121	sdi->inst_type = SR_INST_USB;
	122	sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]),
	123	libusb_get_device_address(devlist[i]), NULL);
bde9fbd1	124	sdi->connection_id = g_strdup(connection_id);
6dcb9723 BV	125	devc = g_malloc(sizeof(struct dev_context));
6dcb9723 BV	126	devc->model = &models[0];
91b77e6b	127	sr_sw_limits_init(&devc->sw_limits);
6dcb9723 BV	128	sdi->priv = devc;
	129	if (testo_probe_channels(sdi) != SR_OK)
	130	continue;
	131	drvc->instances = g_slist_append(drvc->instances, sdi);
	132	devices = g_slist_append(devices, sdi);
	133	}
	134	libusb_free_device_list(devlist, 1);
	135	g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);
0acdd793 BV	136
	137	return devices;
	138	}
	139
0acdd793 BV	140	static int dev_open(struct sr_dev_inst *sdi)
0acdd793 BV	141	{
4f840ce9	142	struct sr_dev_driver *di = sdi->driver;
41812aca	143	struct drv_context *drvc = di->context;
6dcb9723	144	struct sr_usb_dev_inst *usb;
b75dc14a	145	int ret;
6dcb9723	146
6dcb9723	147	usb = sdi->conn;
b75dc14a LPC	148
	149	ret = sr_usb_open(drvc->sr_ctx->libusb_ctx, usb);
	150	if (ret != SR_OK)
	151	return ret;
0acdd793	152
88b1d4e5 BV	153	if (libusb_has_capability(LIBUSB_CAP_SUPPORTS_DETACH_KERNEL_DRIVER)) {
	154	if (libusb_kernel_driver_active(usb->devhdl, 0) == 1) {
	155	if ((ret = libusb_detach_kernel_driver(usb->devhdl, 0)) < 0) {
	156	sr_err("Failed to detach kernel driver: %s.",
	157	libusb_error_name(ret));
	158	return SR_ERR;
	159	}
	160	}
	161	}
	162
6dcb9723 BV	163	if ((ret = libusb_claim_interface(usb->devhdl, 0))) {
	164	sr_err("Failed to claim interface: %s.", libusb_error_name(ret));
	165	return SR_ERR;
	166	}
0acdd793 BV	167	sdi->status = SR_ST_ACTIVE;
	168
	169	return SR_OK;
	170	}
	171
	172	static int dev_close(struct sr_dev_inst *sdi)
	173	{
6dcb9723 BV	174	struct sr_usb_dev_inst *usb;
6dcb9723 BV	175
6dcb9723 BV	176	usb = sdi->conn;
	177	if (!usb->devhdl)
	178	/* Nothing to do. */
	179	return SR_OK;
0acdd793	180
6dcb9723 BV	181	libusb_release_interface(usb->devhdl, 0);
	182	libusb_close(usb->devhdl);
	183	usb->devhdl = NULL;
0acdd793 BV	184	sdi->status = SR_ST_INACTIVE;
	185
	186	return SR_OK;
	187	}
	188
584560f1	189	static int config_get(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
0acdd793 BV	190	const struct sr_channel_group *cg)
0acdd793 BV	191	{
91b77e6b	192	struct dev_context *devc = sdi->priv;
6dcb9723 BV	193	struct sr_usb_dev_inst *usb;
6dcb9723 BV	194	char str[128];
0acdd793	195
0acdd793 BV	196	(void)cg;
0acdd793 BV	197
0acdd793	198	switch (key) {
6dcb9723 BV	199	case SR_CONF_CONN:
	200	if (!sdi \|\| !sdi->conn)
	201	return SR_ERR_ARG;
	202	usb = sdi->conn;
	203	snprintf(str, 128, "%d.%d", usb->bus, usb->address);
	204	*data = g_variant_new_string(str);
	205	break;
91b77e6b LPC	206	case SR_CONF_LIMIT_MSEC:
	207	case SR_CONF_LIMIT_SAMPLES:
	208	return sr_sw_limits_config_get(&devc->sw_limits, key, data);
0acdd793 BV	209	default:
	210	return SR_ERR_NA;
	211	}
	212
6dcb9723	213	return SR_OK;
0acdd793 BV	214	}
0acdd793 BV	215
584560f1	216	static int config_set(uint32_t key, GVariant data, const struct sr_dev_inst sdi,
0acdd793 BV	217	const struct sr_channel_group *cg)
0acdd793 BV	218	{
91b77e6b	219	struct dev_context *devc = sdi->priv;
0acdd793	220
0acdd793 BV	221	(void)cg;
	222
	223	if (sdi->status != SR_ST_ACTIVE)
	224	return SR_ERR_DEV_CLOSED;
	225
91b77e6b	226	return sr_sw_limits_config_set(&devc->sw_limits, key, data);
0acdd793 BV	227	}
0acdd793 BV	228
584560f1	229	static int config_list(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
0acdd793 BV	230	const struct sr_channel_group *cg)
0acdd793 BV	231	{
0acdd793	232	(void)sdi;
0acdd793 BV	233	(void)cg;
0acdd793 BV	234
0acdd793	235	switch (key) {
6dcb9723	236	case SR_CONF_SCAN_OPTIONS:
584560f1 BV	237	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
584560f1 BV	238	scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
6dcb9723 BV	239	break;
6dcb9723 BV	240	case SR_CONF_DEVICE_OPTIONS:
584560f1 BV	241	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
584560f1 BV	242	devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
6dcb9723	243	break;
0acdd793 BV	244	default:
	245	return SR_ERR_NA;
	246	}
	247
6dcb9723	248	return SR_OK;
0acdd793 BV	249	}
0acdd793 BV	250
6dcb9723	251	static void receive_data(struct sr_dev_inst sdi, unsigned char data, int len)
0acdd793	252	{
6dcb9723 BV	253	struct dev_context *devc;
6dcb9723 BV	254	int packet_size;
87895640	255	uint16_t crc;
6dcb9723 BV	256
	257	devc = sdi->priv;
	258
	259	if (devc->reply_size + len > MAX_REPLY_SIZE) {
	260	/* Something went very wrong. */
	261	sr_dbg("Receive buffer overrun.");
	262	devc->reply_size = 0;
	263	return;
	264	}
	265
	266	memcpy(devc->reply + devc->reply_size, data, len);
	267	devc->reply_size += len;
	268	/* Sixth byte contains the length of the packet. */
87895640 BV	269	if (devc->reply_size < 7)
	270	return;
	271
	272	packet_size = 7 + devc->reply[6] * 7 + 2;
	273	if (devc->reply_size < packet_size)
	274	return;
	275
	276	if (!testo_check_packet_prefix(devc->reply, devc->reply_size))
	277	return;
	278
	279	crc = crc16_mcrf4xx(0xffff, devc->reply, devc->reply_size - 2);
88b1d4e5	280	if (crc == RL16(&devc->reply[devc->reply_size - 2])) {
87895640	281	testo_receive_packet(sdi);
91b77e6b	282	sr_sw_limits_update_samples_read(&devc->sw_limits, 1);
87895640 BV	283	} else {
87895640 BV	284	sr_dbg("Packet has invalid CRC.");
6dcb9723 BV	285	}
6dcb9723 BV	286
87895640	287	devc->reply_size = 0;
91b77e6b	288	if (sr_sw_limits_check(&devc->sw_limits))
695dc859	289	dev_acquisition_stop(sdi);
87895640 BV	290	else
	291	testo_request_packet(sdi);
	292
6dcb9723 BV	293	}
6dcb9723 BV	294
55462b8b	295	SR_PRIV void LIBUSB_CALL receive_transfer(struct libusb_transfer *transfer)
6dcb9723 BV	296	{
	297	struct dev_context *devc;
	298	struct sr_dev_inst *sdi;
	299	int ret;
	300
	301	sdi = transfer->user_data;
	302	devc = sdi->priv;
	303	if (transfer == devc->out_transfer)
	304	/* Just the command acknowledgement. */
	305	return;
	306
	307	if (transfer->status == LIBUSB_TRANSFER_NO_DEVICE) {
	308	/* USB device was unplugged. */
695dc859	309	dev_acquisition_stop(sdi);
6dcb9723 BV	310	} else if (transfer->status == LIBUSB_TRANSFER_COMPLETED) {
	311	/* First two bytes in any transfer are FTDI status bytes. */
	312	if (transfer->actual_length > 2)
	313	receive_data(sdi, transfer->buffer + 2, transfer->actual_length - 2);
	314	}
	315	/* Anything else is either an error or a timeout, which is fine:
	316	* we were just going to send another transfer request anyway. */
	317
	318	if (sdi->status == SR_ST_ACTIVE) {
	319	if ((ret = libusb_submit_transfer(transfer) != 0)) {
	320	sr_err("Unable to resubmit transfer: %s.",
	321	libusb_error_name(ret));
	322	g_free(transfer->buffer);
	323	libusb_free_transfer(transfer);
695dc859	324	dev_acquisition_stop(sdi);
6dcb9723 BV	325	}
	326	} else {
	327	/* This was the last transfer we're going to receive, so
	328	* clean up now. */
	329	g_free(transfer->buffer);
	330	libusb_free_transfer(transfer);
	331	}
	332	}
	333
	334	static int handle_events(int fd, int revents, void *cb_data)
	335	{
4f840ce9	336	struct sr_dev_driver *di;
6dcb9723	337	struct dev_context *devc;
4f840ce9	338	struct drv_context *drvc;
6dcb9723 BV	339	struct sr_dev_inst *sdi;
6dcb9723 BV	340	struct timeval tv;
6dcb9723 BV	341
	342	(void)fd;
	343	(void)revents;
	344
	345	sdi = cb_data;
	346	devc = sdi->priv;
4f840ce9	347	di = sdi->driver;
41812aca	348	drvc = di->context;
6dcb9723	349
91b77e6b LPC	350	if (sr_sw_limits_check(&devc->sw_limits))
91b77e6b LPC	351	dev_acquisition_stop(sdi);
6dcb9723 BV	352
6dcb9723 BV	353	if (sdi->status == SR_ST_STOPPING) {
102f1239	354	usb_source_remove(sdi->session, drvc->sr_ctx);
6dcb9723	355	dev_close(sdi);
3be42bc2	356	std_session_send_df_end(sdi, LOG_PREFIX);
6dcb9723 BV	357	}
	358
	359	memset(&tv, 0, sizeof(struct timeval));
	360	libusb_handle_events_timeout_completed(drvc->sr_ctx->libusb_ctx, &tv,
	361	NULL);
	362
	363	return TRUE;
	364	}
	365
695dc859	366	static int dev_acquisition_start(const struct sr_dev_inst *sdi)
6dcb9723	367	{
4f840ce9	368	struct sr_dev_driver *di = sdi->driver;
6dcb9723 BV	369	struct drv_context *drvc;
	370	struct dev_context *devc;
	371	struct sr_usb_dev_inst *usb;
	372	struct libusb_transfer *transfer;
	373	int ret;
	374	unsigned char *buf;
0acdd793	375
41812aca	376	drvc = di->context;
0acdd793 BV	377	if (sdi->status != SR_ST_ACTIVE)
	378	return SR_ERR_DEV_CLOSED;
	379
6dcb9723 BV	380
	381	devc = sdi->priv;
	382	usb = sdi->conn;
6dcb9723 BV	383	devc->reply_size = 0;
6dcb9723 BV	384
695dc859	385	std_session_send_df_header(sdi, LOG_PREFIX);
6dcb9723	386
102f1239 BV	387	usb_source_add(sdi->session, drvc->sr_ctx, 100,
102f1239 BV	388	handle_events, (void *)sdi);
6dcb9723 BV	389
	390	if (testo_set_serial_params(usb) != SR_OK)
	391	return SR_ERR;
	392
	393	devc->out_transfer = libusb_alloc_transfer(0);
	394	if (testo_request_packet(sdi) != SR_OK)
	395	return SR_ERR;
	396
a95f142e	397	buf = g_malloc(MAX_REPLY_SIZE);
6dcb9723 BV	398	transfer = libusb_alloc_transfer(0);
	399	libusb_fill_bulk_transfer(transfer, usb->devhdl, EP_IN, buf,
	400	MAX_REPLY_SIZE, receive_transfer, (void *)sdi, 100);
	401	if ((ret = libusb_submit_transfer(transfer) != 0)) {
	402	sr_err("Unable to submit transfer: %s.", libusb_error_name(ret));
	403	libusb_free_transfer(transfer);
	404	g_free(buf);
	405	return SR_ERR;
	406	}
	407	devc->reply_size = 0;
0acdd793	408
91b77e6b LPC	409	sr_sw_limits_acquisition_start(&devc->sw_limits);
91b77e6b LPC	410
0acdd793 BV	411	return SR_OK;
	412	}
	413
695dc859	414	static int dev_acquisition_stop(struct sr_dev_inst *sdi)
0acdd793	415	{
0acdd793 BV	416	if (sdi->status != SR_ST_ACTIVE)
	417	return SR_ERR_DEV_CLOSED;
	418
6dcb9723	419	sdi->status = SR_ST_STOPPING;
0acdd793 BV	420
	421	return SR_OK;
	422	}
	423
dd5c48a6	424	static struct sr_dev_driver testo_driver_info = {
0acdd793 BV	425	.name = "testo",
	426	.longname = "Testo",
	427	.api_version = 1,
c2fdcc25	428	.init = std_init,
700d6b64	429	.cleanup = std_cleanup,
0acdd793	430	.scan = scan,
c01bf34c	431	.dev_list = std_dev_list,
0acdd793 BV	432	.config_get = config_get,
	433	.config_set = config_set,
	434	.config_list = config_list,
	435	.dev_open = dev_open,
	436	.dev_close = dev_close,
	437	.dev_acquisition_start = dev_acquisition_start,
	438	.dev_acquisition_stop = dev_acquisition_stop,
41812aca	439	.context = NULL,
0acdd793	440	};
dd5c48a6	441	SR_REGISTER_DEV_DRIVER(testo_driver_info);