[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;
	drvc->instances = NULL;

	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 BV	61	drvc->instances = NULL;
0acdd793 BV	62
6dcb9723 BV	63	conn_devices = NULL;
	64	for (l = options; l; l = l->next) {
	65	src = l->data;
	66	if (src->key != SR_CONF_CONN)
	67	continue;
	68	str = g_variant_get_string(src->data, NULL);
	69	conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, str);
	70	}
	71
	72	libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
	73	for (i = 0; devlist[i]; i++) {
	74	if (conn_devices) {
	75	usb = NULL;
	76	for (l = conn_devices; l; l = l->next) {
	77	usb = l->data;
	78	if (usb->bus == libusb_get_bus_number(devlist[i])
	79	&& usb->address == libusb_get_device_address(devlist[i]))
	80	break;
	81	}
	82	if (!l)
	83	/* This device matched none of the ones that
	84	* matched the conn specification. */
	85	continue;
	86	}
	87
2a8f2d41	88	libusb_get_device_descriptor(devlist[i], &des);
6dcb9723 BV	89
	90	if ((ret = libusb_open(devlist[i], &hdl)) < 0)
	91	continue;
	92
	93	manufacturer[0] = product[0] = '\0';
	94	if (des.iManufacturer && (ret = libusb_get_string_descriptor_ascii(
	95	hdl, des.iManufacturer, (unsigned char *) manufacturer,
	96	sizeof(manufacturer))) < 0) {
	97	sr_warn("Failed to get manufacturer string descriptor: %s.",
	98	libusb_error_name(ret));
	99	}
	100	if (des.iProduct && (ret = libusb_get_string_descriptor_ascii(
	101	hdl, des.iProduct, (unsigned char *) product,
	102	sizeof(product))) < 0) {
	103	sr_warn("Failed to get product string descriptor: %s.",
	104	libusb_error_name(ret));
	105	}
	106	libusb_close(hdl);
	107
	108	if (strncmp(manufacturer, "testo", 5))
	109	continue;
	110
bde9fbd1 SA	111	usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
bde9fbd1 SA	112
6dcb9723 BV	113	/* Hardcode the 435 for now.*/
	114	if (strcmp(product, "testo 435/635/735"))
	115	continue;
	116
aac29cc1	117	sdi = g_malloc0(sizeof(struct sr_dev_inst));
0af636be UH	118	sdi->status = SR_ST_INACTIVE;
	119	sdi->vendor = g_strdup("Testo");
	120	sdi->model = g_strdup("435/635/735");
6dcb9723 BV	121	sdi->driver = di;
	122	sdi->inst_type = SR_INST_USB;
	123	sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]),
	124	libusb_get_device_address(devlist[i]), NULL);
bde9fbd1	125	sdi->connection_id = g_strdup(connection_id);
6dcb9723 BV	126	devc = g_malloc(sizeof(struct dev_context));
6dcb9723 BV	127	devc->model = &models[0];
91b77e6b	128	sr_sw_limits_init(&devc->sw_limits);
6dcb9723 BV	129	sdi->priv = devc;
	130	if (testo_probe_channels(sdi) != SR_OK)
	131	continue;
	132	drvc->instances = g_slist_append(drvc->instances, sdi);
	133	devices = g_slist_append(devices, sdi);
	134	}
	135	libusb_free_device_list(devlist, 1);
	136	g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);
0acdd793 BV	137
	138	return devices;
	139	}
	140
0acdd793 BV	141	static int dev_open(struct sr_dev_inst *sdi)
0acdd793 BV	142	{
4f840ce9	143	struct sr_dev_driver *di = sdi->driver;
41812aca	144	struct drv_context *drvc = di->context;
6dcb9723	145	struct sr_usb_dev_inst *usb;
b75dc14a	146	int ret;
6dcb9723	147
6dcb9723	148	usb = sdi->conn;
b75dc14a LPC	149
	150	ret = sr_usb_open(drvc->sr_ctx->libusb_ctx, usb);
	151	if (ret != SR_OK)
	152	return ret;
0acdd793	153
88b1d4e5 BV	154	if (libusb_has_capability(LIBUSB_CAP_SUPPORTS_DETACH_KERNEL_DRIVER)) {
	155	if (libusb_kernel_driver_active(usb->devhdl, 0) == 1) {
	156	if ((ret = libusb_detach_kernel_driver(usb->devhdl, 0)) < 0) {
	157	sr_err("Failed to detach kernel driver: %s.",
	158	libusb_error_name(ret));
	159	return SR_ERR;
	160	}
	161	}
	162	}
	163
6dcb9723 BV	164	if ((ret = libusb_claim_interface(usb->devhdl, 0))) {
	165	sr_err("Failed to claim interface: %s.", libusb_error_name(ret));
	166	return SR_ERR;
	167	}
0acdd793 BV	168	sdi->status = SR_ST_ACTIVE;
	169
	170	return SR_OK;
	171	}
	172
	173	static int dev_close(struct sr_dev_inst *sdi)
	174	{
6dcb9723 BV	175	struct sr_usb_dev_inst *usb;
6dcb9723 BV	176
6dcb9723 BV	177	usb = sdi->conn;
	178	if (!usb->devhdl)
	179	/* Nothing to do. */
	180	return SR_OK;
0acdd793	181
6dcb9723 BV	182	libusb_release_interface(usb->devhdl, 0);
	183	libusb_close(usb->devhdl);
	184	usb->devhdl = NULL;
0acdd793 BV	185	sdi->status = SR_ST_INACTIVE;
	186
	187	return SR_OK;
	188	}
	189
584560f1	190	static int config_get(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
0acdd793 BV	191	const struct sr_channel_group *cg)
0acdd793 BV	192	{
91b77e6b	193	struct dev_context *devc = sdi->priv;
6dcb9723 BV	194	struct sr_usb_dev_inst *usb;
6dcb9723 BV	195	char str[128];
0acdd793	196
0acdd793 BV	197	(void)cg;
0acdd793 BV	198
0acdd793	199	switch (key) {
6dcb9723 BV	200	case SR_CONF_CONN:
	201	if (!sdi \|\| !sdi->conn)
	202	return SR_ERR_ARG;
	203	usb = sdi->conn;
	204	snprintf(str, 128, "%d.%d", usb->bus, usb->address);
	205	*data = g_variant_new_string(str);
	206	break;
91b77e6b LPC	207	case SR_CONF_LIMIT_MSEC:
	208	case SR_CONF_LIMIT_SAMPLES:
	209	return sr_sw_limits_config_get(&devc->sw_limits, key, data);
0acdd793 BV	210	default:
	211	return SR_ERR_NA;
	212	}
	213
6dcb9723	214	return SR_OK;
0acdd793 BV	215	}
0acdd793 BV	216
584560f1	217	static int config_set(uint32_t key, GVariant data, const struct sr_dev_inst sdi,
0acdd793 BV	218	const struct sr_channel_group *cg)
0acdd793 BV	219	{
91b77e6b	220	struct dev_context *devc = sdi->priv;
0acdd793	221
0acdd793 BV	222	(void)cg;
	223
	224	if (sdi->status != SR_ST_ACTIVE)
	225	return SR_ERR_DEV_CLOSED;
	226
91b77e6b	227	return sr_sw_limits_config_set(&devc->sw_limits, key, data);
0acdd793 BV	228	}
0acdd793 BV	229
584560f1	230	static int config_list(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
0acdd793 BV	231	const struct sr_channel_group *cg)
0acdd793 BV	232	{
0acdd793	233	(void)sdi;
0acdd793 BV	234	(void)cg;
0acdd793 BV	235
0acdd793	236	switch (key) {
6dcb9723	237	case SR_CONF_SCAN_OPTIONS:
584560f1 BV	238	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
584560f1 BV	239	scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
6dcb9723 BV	240	break;
6dcb9723 BV	241	case SR_CONF_DEVICE_OPTIONS:
584560f1 BV	242	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
584560f1 BV	243	devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
6dcb9723	244	break;
0acdd793 BV	245	default:
	246	return SR_ERR_NA;
	247	}
	248
6dcb9723	249	return SR_OK;
0acdd793 BV	250	}
0acdd793 BV	251
6dcb9723	252	static void receive_data(struct sr_dev_inst sdi, unsigned char data, int len)
0acdd793	253	{
6dcb9723 BV	254	struct dev_context *devc;
6dcb9723 BV	255	int packet_size;
87895640	256	uint16_t crc;
6dcb9723 BV	257
	258	devc = sdi->priv;
	259
	260	if (devc->reply_size + len > MAX_REPLY_SIZE) {
	261	/* Something went very wrong. */
	262	sr_dbg("Receive buffer overrun.");
	263	devc->reply_size = 0;
	264	return;
	265	}
	266
	267	memcpy(devc->reply + devc->reply_size, data, len);
	268	devc->reply_size += len;
	269	/* Sixth byte contains the length of the packet. */
87895640 BV	270	if (devc->reply_size < 7)
	271	return;
	272
	273	packet_size = 7 + devc->reply[6] * 7 + 2;
	274	if (devc->reply_size < packet_size)
	275	return;
	276
	277	if (!testo_check_packet_prefix(devc->reply, devc->reply_size))
	278	return;
	279
	280	crc = crc16_mcrf4xx(0xffff, devc->reply, devc->reply_size - 2);
88b1d4e5	281	if (crc == RL16(&devc->reply[devc->reply_size - 2])) {
87895640	282	testo_receive_packet(sdi);
91b77e6b	283	sr_sw_limits_update_samples_read(&devc->sw_limits, 1);
87895640 BV	284	} else {
87895640 BV	285	sr_dbg("Packet has invalid CRC.");
6dcb9723 BV	286	}
6dcb9723 BV	287
87895640	288	devc->reply_size = 0;
91b77e6b	289	if (sr_sw_limits_check(&devc->sw_limits))
695dc859	290	dev_acquisition_stop(sdi);
87895640 BV	291	else
	292	testo_request_packet(sdi);
	293
6dcb9723 BV	294	}
6dcb9723 BV	295
55462b8b	296	SR_PRIV void LIBUSB_CALL receive_transfer(struct libusb_transfer *transfer)
6dcb9723 BV	297	{
	298	struct dev_context *devc;
	299	struct sr_dev_inst *sdi;
	300	int ret;
	301
	302	sdi = transfer->user_data;
	303	devc = sdi->priv;
	304	if (transfer == devc->out_transfer)
	305	/* Just the command acknowledgement. */
	306	return;
	307
	308	if (transfer->status == LIBUSB_TRANSFER_NO_DEVICE) {
	309	/* USB device was unplugged. */
695dc859	310	dev_acquisition_stop(sdi);
6dcb9723 BV	311	} else if (transfer->status == LIBUSB_TRANSFER_COMPLETED) {
	312	/* First two bytes in any transfer are FTDI status bytes. */
	313	if (transfer->actual_length > 2)
	314	receive_data(sdi, transfer->buffer + 2, transfer->actual_length - 2);
	315	}
	316	/* Anything else is either an error or a timeout, which is fine:
	317	* we were just going to send another transfer request anyway. */
	318
	319	if (sdi->status == SR_ST_ACTIVE) {
	320	if ((ret = libusb_submit_transfer(transfer) != 0)) {
	321	sr_err("Unable to resubmit transfer: %s.",
	322	libusb_error_name(ret));
	323	g_free(transfer->buffer);
	324	libusb_free_transfer(transfer);
695dc859	325	dev_acquisition_stop(sdi);
6dcb9723 BV	326	}
	327	} else {
	328	/* This was the last transfer we're going to receive, so
	329	* clean up now. */
	330	g_free(transfer->buffer);
	331	libusb_free_transfer(transfer);
	332	}
	333	}
	334
	335	static int handle_events(int fd, int revents, void *cb_data)
	336	{
4f840ce9	337	struct sr_dev_driver *di;
6dcb9723	338	struct dev_context *devc;
4f840ce9	339	struct drv_context *drvc;
6dcb9723 BV	340	struct sr_dev_inst *sdi;
6dcb9723 BV	341	struct timeval tv;
6dcb9723 BV	342
	343	(void)fd;
	344	(void)revents;
	345
	346	sdi = cb_data;
	347	devc = sdi->priv;
4f840ce9	348	di = sdi->driver;
41812aca	349	drvc = di->context;
6dcb9723	350
91b77e6b LPC	351	if (sr_sw_limits_check(&devc->sw_limits))
91b77e6b LPC	352	dev_acquisition_stop(sdi);
6dcb9723 BV	353
6dcb9723 BV	354	if (sdi->status == SR_ST_STOPPING) {
102f1239	355	usb_source_remove(sdi->session, drvc->sr_ctx);
6dcb9723	356	dev_close(sdi);
3be42bc2	357	std_session_send_df_end(sdi, LOG_PREFIX);
6dcb9723 BV	358	}
	359
	360	memset(&tv, 0, sizeof(struct timeval));
	361	libusb_handle_events_timeout_completed(drvc->sr_ctx->libusb_ctx, &tv,
	362	NULL);
	363
	364	return TRUE;
	365	}
	366
695dc859	367	static int dev_acquisition_start(const struct sr_dev_inst *sdi)
6dcb9723	368	{
4f840ce9	369	struct sr_dev_driver *di = sdi->driver;
6dcb9723 BV	370	struct drv_context *drvc;
	371	struct dev_context *devc;
	372	struct sr_usb_dev_inst *usb;
	373	struct libusb_transfer *transfer;
	374	int ret;
	375	unsigned char *buf;
0acdd793	376
41812aca	377	drvc = di->context;
0acdd793 BV	378	if (sdi->status != SR_ST_ACTIVE)
	379	return SR_ERR_DEV_CLOSED;
	380
6dcb9723 BV	381
	382	devc = sdi->priv;
	383	usb = sdi->conn;
6dcb9723 BV	384	devc->reply_size = 0;
6dcb9723 BV	385
695dc859	386	std_session_send_df_header(sdi, LOG_PREFIX);
6dcb9723	387
102f1239 BV	388	usb_source_add(sdi->session, drvc->sr_ctx, 100,
102f1239 BV	389	handle_events, (void *)sdi);
6dcb9723 BV	390
	391	if (testo_set_serial_params(usb) != SR_OK)
	392	return SR_ERR;
	393
	394	devc->out_transfer = libusb_alloc_transfer(0);
	395	if (testo_request_packet(sdi) != SR_OK)
	396	return SR_ERR;
	397
a95f142e	398	buf = g_malloc(MAX_REPLY_SIZE);
6dcb9723 BV	399	transfer = libusb_alloc_transfer(0);
	400	libusb_fill_bulk_transfer(transfer, usb->devhdl, EP_IN, buf,
	401	MAX_REPLY_SIZE, receive_transfer, (void *)sdi, 100);
	402	if ((ret = libusb_submit_transfer(transfer) != 0)) {
	403	sr_err("Unable to submit transfer: %s.", libusb_error_name(ret));
	404	libusb_free_transfer(transfer);
	405	g_free(buf);
	406	return SR_ERR;
	407	}
	408	devc->reply_size = 0;
0acdd793	409
91b77e6b LPC	410	sr_sw_limits_acquisition_start(&devc->sw_limits);
91b77e6b LPC	411
0acdd793 BV	412	return SR_OK;
	413	}
	414
695dc859	415	static int dev_acquisition_stop(struct sr_dev_inst *sdi)
0acdd793	416	{
0acdd793 BV	417	if (sdi->status != SR_ST_ACTIVE)
	418	return SR_ERR_DEV_CLOSED;
	419
6dcb9723	420	sdi->status = SR_ST_STOPPING;
0acdd793 BV	421
	422	return SR_OK;
	423	}
	424
dd5c48a6	425	static struct sr_dev_driver testo_driver_info = {
0acdd793 BV	426	.name = "testo",
	427	.longname = "Testo",
	428	.api_version = 1,
c2fdcc25	429	.init = std_init,
700d6b64	430	.cleanup = std_cleanup,
0acdd793	431	.scan = scan,
c01bf34c	432	.dev_list = std_dev_list,
0acdd793 BV	433	.config_get = config_get,
	434	.config_set = config_set,
	435	.config_list = config_list,
	436	.dev_open = dev_open,
	437	.dev_close = dev_close,
	438	.dev_acquisition_start = dev_acquisition_start,
	439	.dev_acquisition_stop = dev_acquisition_stop,
41812aca	440	.context = NULL,
0acdd793	441	};
dd5c48a6	442	SR_REGISTER_DEV_DRIVER(testo_driver_info);