[libsigrok.git] / src / hardware / ipdbg-la / protocol.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2016 Eva Kissling <eva.kissling@bluewin.ch>
 *
 * 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>

#ifdef _WIN32
#define _WIN32_WINNT 0x0501
#include <winsock2.h>
#include <ws2tcpip.h>
#else
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <sys/ioctl.h>
#endif
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include "protocol.h"

#define BUFFER_SIZE 4

/* Top-level command opcodes */
#define CMD_SET_TRIGGER            0x00
#define CMD_CFG_TRIGGER            0xF0
#define CMD_CFG_LA                 0x0F
#define CMD_START                  0xFE
#define CMD_RESET                  0xEE

#define CMD_GET_BUS_WIDTHS         0xAA
#define CMD_GET_LA_ID              0xBB
#define CMD_ESCAPE                 0x55

/* Trigger subfunction command opcodes */
#define CMD_TRIG_MASKS             0xF1
#define CMD_TRIG_MASK              0xF3
#define CMD_TRIG_VALUE             0xF7

#define CMD_TRIG_MASKS_LAST        0xF9
#define CMD_TRIG_MASK_LAST         0xFB
#define CMD_TRIG_VALUE_LAST        0xFF

#define CMD_TRIG_SELECT_EDGE_MASK  0xF5
#define CMD_TRIG_SET_EDGE_MASK     0xF6

/* LA subfunction command opcodes */
#define CMD_LA_DELAY               0x1F

static gboolean data_available(struct ipdbg_la_tcp *tcp)
{
#ifdef _WIN32
	u_long bytes_available;
	if(ioctlsocket(tcp->socket, FIONREAD, &bytes_available) != 0){
#else
	int bytes_available;
	if (ioctl(tcp->socket, FIONREAD, &bytes_available) < 0){ 	// TIOCMGET
#endif
		sr_err("FIONREAD failed: %s\n", g_strerror(errno));
		return FALSE;
	}
	return (bytes_available > 0);
}

SR_PRIV struct ipdbg_la_tcp *ipdbg_la_tcp_new(void)
{
	struct ipdbg_la_tcp *tcp;

	tcp = g_malloc0(sizeof(struct ipdbg_la_tcp));
	tcp->address = NULL;
	tcp->port = NULL;
	tcp->socket = -1;

	return tcp;
}

SR_PRIV void ipdbg_la_tcp_free(struct ipdbg_la_tcp *tcp)
{
	g_free(tcp->address);
	g_free(tcp->port);
}

SR_PRIV int ipdbg_la_tcp_open(struct ipdbg_la_tcp *tcp)
{
	struct addrinfo hints;
	struct addrinfo *results, *res;
	int err;

	memset(&hints, 0, sizeof(hints));
	hints.ai_family = AF_UNSPEC;
	hints.ai_socktype = SOCK_STREAM;
	hints.ai_protocol = IPPROTO_TCP;

	err = getaddrinfo(tcp->address, tcp->port, &hints, &results);

	if (err) {
		sr_err("Address lookup failed: %s:%s: %s", tcp->address,
			tcp->port, gai_strerror(err));
		return SR_ERR;
	}

	for (res = results; res; res = res->ai_next) {
		if ((tcp->socket = socket(res->ai_family, res->ai_socktype,
			res->ai_protocol)) < 0)
			continue;
		if (connect(tcp->socket, res->ai_addr, res->ai_addrlen) != 0) {
			close(tcp->socket);
			tcp->socket = -1;
			continue;
		}
		break;
	}

	freeaddrinfo(results);

	if (tcp->socket < 0) {
		sr_err("Failed to connect to %s:%s: %s", tcp->address, tcp->port,
			g_strerror(errno));
		return SR_ERR;
	}

	return SR_OK;
}

SR_PRIV int ipdbg_la_tcp_close(struct ipdbg_la_tcp *tcp)
{
	int ret = SR_OK;

#ifdef _WIN32
	if (shutdown(tcp->socket, SD_SEND) != SOCKET_ERROR)
	{
		char recvbuf[16];
		int recvbuflen = 16;
		// Receive until the peer closes the connection
		while(recv(tcp->socket, recvbuf, recvbuflen, 0) > 0);
	}
#endif
	if (close(tcp->socket) < 0)
		ret = SR_ERR;

	tcp->socket = -1;

	return ret;
}

static int tcp_send(struct ipdbg_la_tcp *tcp, const uint8_t *buf, size_t len)
{
	int out;
	out = send(tcp->socket, (const char *)buf, len, 0);

	if (out < 0) {
		sr_err("Send error: %s", g_strerror(errno));
		return SR_ERR;
	}

	if (out < (int)len)
		sr_dbg("Only sent %d/%d bytes of data.", out, (int)len);

	return SR_OK;
}

static int tcp_receive_blocking(struct ipdbg_la_tcp *tcp,
	uint8_t *buf, int bufsize)
{
	int received = 0;
	int error_count = 0;

	/* Timeout after 500ms of not receiving data */
	/* increase timeout in case lab is not just beside the office */
	while ((received < bufsize) && (error_count < 2000)) {
		int recd = ipdbg_la_tcp_receive(tcp, buf, bufsize-received);
		if ( recd > 0 ) {
			buf += recd;
			received += recd;
		} else {
			error_count++;
			g_usleep(1000);  /* Sleep for 1ms */
		}
	}

	return received;
}

SR_PRIV int ipdbg_la_tcp_receive(struct ipdbg_la_tcp *tcp,
	uint8_t *buf, size_t bufsize)
{
	int received = 0;
	if (data_available(tcp))
		received = recv(tcp->socket, (char *)buf, bufsize, 0);
	if (received < 0) {
		sr_err("Receive error: %s", g_strerror(errno));
		return -1;
	} else
		return received;
}

SR_PRIV int ipdbg_la_convert_trigger(const struct sr_dev_inst *sdi)
{
	struct dev_context *devc;
	struct sr_trigger *trigger;
	struct sr_trigger_stage *stage;
	struct sr_trigger_match *match;
	const GSList *l, *m;

	devc = sdi->priv;

	devc->num_stages = 0;
	devc->num_transfers = 0;
	devc->raw_sample_buf = NULL;

	for (uint64_t i = 0; i < devc->data_width_bytes; i++) {
		devc->trigger_mask[i] = 0;
		devc->trigger_value[i] = 0;
		devc->trigger_mask_last[i] = 0;
		devc->trigger_value_last[i] = 0;
		devc->trigger_edge_mask[i] = 0;
	}

	if (!(trigger = sr_session_trigger_get(sdi->session)))
		return SR_OK;

	for (l = trigger->stages; l; l = l->next) {
		stage = l->data;
		for (m = stage->matches; m; m = m->next) {
			match = m->data;
			int byte_idx = match->channel->index / 8;
			uint8_t match_bit = 1 << (match->channel->index % 8);

			if (!match->channel->enabled)
				/* Ignore disabled channels with a trigger. */
				continue;

			if (match->match == SR_TRIGGER_ONE) {
				devc->trigger_value[byte_idx] |= match_bit;
				devc->trigger_mask[byte_idx] |= match_bit;
				devc->trigger_mask_last[byte_idx] &= ~match_bit;
				devc->trigger_edge_mask[byte_idx] &= ~match_bit;
			} else if (match->match == SR_TRIGGER_ZERO) {
				devc->trigger_value[byte_idx] &= ~match_bit;
				devc->trigger_mask[byte_idx] |= match_bit;
				devc->trigger_mask_last[byte_idx] &= ~match_bit;
				devc->trigger_edge_mask[byte_idx] &= ~match_bit;
			} else if (match->match == SR_TRIGGER_RISING) {
				devc->trigger_value[byte_idx] |= match_bit;
				devc->trigger_value_last[byte_idx] &=
				    ~match_bit;
				devc->trigger_mask[byte_idx] |= match_bit;
				devc->trigger_mask_last[byte_idx] |= match_bit;
				devc->trigger_edge_mask[byte_idx] &= ~match_bit;
			} else if (match->match == SR_TRIGGER_FALLING) {
				devc->trigger_value[byte_idx] &= ~match_bit;
				devc->trigger_value_last[byte_idx] |= match_bit;
				devc->trigger_mask[byte_idx] |= match_bit;
				devc->trigger_mask_last[byte_idx] |= match_bit;
				devc->trigger_edge_mask[byte_idx] &= ~match_bit;
			} else if (match->match == SR_TRIGGER_EDGE) {
				devc->trigger_mask[byte_idx] &= ~match_bit;
				devc->trigger_mask_last[byte_idx] &= ~match_bit;
				devc->trigger_edge_mask[byte_idx] |= match_bit;
			}
		}
	}

	return SR_OK;
}

SR_PRIV int ipdbg_la_receive_data(int fd, int revents, void *cb_data)
{
	const struct sr_dev_inst *sdi;
	struct dev_context *devc;

	(void)fd;
	(void)revents;

	sdi = cb_data;
	if (!sdi)
		return FALSE;

	if (!(devc = sdi->priv))
		return FALSE;

	struct ipdbg_la_tcp *tcp = sdi->conn;
	struct sr_datafeed_packet packet;
	struct sr_datafeed_logic logic;

	if (!devc->raw_sample_buf) {
		devc->raw_sample_buf =
			g_try_malloc(devc->limit_samples * devc->data_width_bytes);
		if (!devc->raw_sample_buf) {
			sr_err("Sample buffer malloc failed.");
			return FALSE;
		}
	}

	if (devc->num_transfers <
		(devc->limit_samples_max * devc->data_width_bytes)) {
		const size_t bufsize = 1024;
		uint8_t buffer[bufsize];

		const int recd = ipdbg_la_tcp_receive(tcp, buffer, bufsize);
		if ( recd > 0) {
			int num_move = (((devc->num_transfers + recd) <=
							 (devc->limit_samples * devc->data_width_bytes))
			?
				recd
			:
				(int)((devc->limit_samples * devc->data_width_bytes) -
						devc->num_transfers));
			if ( num_move > 0 )
				memcpy(&(devc->raw_sample_buf[devc->num_transfers]),
						buffer, num_move);
			devc->num_transfers += recd;
		}
	} else {
		if (devc->delay_value > 0) {
			/* There are pre-trigger samples, send those first. */
			packet.type = SR_DF_LOGIC;
			packet.payload = &logic;
			logic.length = devc->delay_value * devc->data_width_bytes;
			logic.unitsize = devc->data_width_bytes;
			logic.data = devc->raw_sample_buf;
			sr_session_send(cb_data, &packet);
		}

		/* Send the trigger. */
		packet.type = SR_DF_TRIGGER;
		sr_session_send(cb_data, &packet);

		/* Send post-trigger samples. */
		packet.type = SR_DF_LOGIC;
		packet.payload = &logic;
		logic.length = (devc->limit_samples - devc->delay_value) *
			devc->data_width_bytes;
		logic.unitsize = devc->data_width_bytes;
		logic.data = devc->raw_sample_buf +
			(devc->delay_value * devc->data_width_bytes);
		sr_session_send(cb_data, &packet);

		g_free(devc->raw_sample_buf);
		devc->raw_sample_buf = NULL;

		ipdbg_la_abort_acquisition(sdi);
	}

	return TRUE;
}

static int send_escaping(struct ipdbg_la_tcp *tcp, uint8_t *data_to_send,
	uint32_t length)
{
	uint8_t escape = CMD_ESCAPE;

	while (length--) {
		uint8_t payload = *data_to_send++;

		if (payload == CMD_RESET)
			if (tcp_send(tcp, &escape, 1) != SR_OK)
				sr_warn("Couldn't send escape");

		if (payload == CMD_ESCAPE)
			if (tcp_send(tcp, &escape, 1) != SR_OK)
				sr_warn("Couldn't send escape");

		if (tcp_send(tcp, &payload, 1) != SR_OK)
			sr_warn("Couldn't send data");
	}

	return SR_OK;
}

SR_PRIV int ipdbg_la_send_delay(struct dev_context *devc,
	struct ipdbg_la_tcp *tcp)
{
	devc->delay_value = (devc->limit_samples / 100.0) * devc->capture_ratio;

	uint8_t buf;
	buf = CMD_CFG_LA;
	tcp_send(tcp, &buf, 1);
	buf = CMD_LA_DELAY;
	tcp_send(tcp, &buf, 1);

	uint8_t delay_buf[4] = { devc->delay_value & 0x000000ff,
		(devc->delay_value >> 8) & 0x000000ff,
		(devc->delay_value >> 16) & 0x000000ff,
		(devc->delay_value >> 24) & 0x000000ff
	};

	for (uint64_t i = 0; i < devc->addr_width_bytes; i++)
		send_escaping(tcp, &(delay_buf[devc->addr_width_bytes - 1 - i]), 1);

	return SR_OK;
}

SR_PRIV int ipdbg_la_send_trigger(struct dev_context *devc,
	struct ipdbg_la_tcp *tcp)
{
	uint8_t buf;

	/* Mask */
	buf = CMD_CFG_TRIGGER;
	tcp_send(tcp, &buf, 1);
	buf = CMD_TRIG_MASKS;
	tcp_send(tcp, &buf, 1);
	buf = CMD_TRIG_MASK;
	tcp_send(tcp, &buf, 1);

	for (size_t i = 0; i < devc->data_width_bytes; i++)
		send_escaping(tcp,
			devc->trigger_mask + devc->data_width_bytes - 1 - i, 1);

	/* Value */
	buf = CMD_CFG_TRIGGER;
	tcp_send(tcp, &buf, 1);
	buf = CMD_TRIG_MASKS;
	tcp_send(tcp, &buf, 1);
	buf = CMD_TRIG_VALUE;
	tcp_send(tcp, &buf, 1);

	for (size_t i = 0; i < devc->data_width_bytes; i++)
		send_escaping(tcp,
			devc->trigger_value + devc->data_width_bytes - 1 - i, 1);

	/* Mask_last */
	buf = CMD_CFG_TRIGGER;
	tcp_send(tcp, &buf, 1);
	buf = CMD_TRIG_MASKS_LAST;
	tcp_send(tcp, &buf, 1);
	buf = CMD_TRIG_MASK_LAST;
	tcp_send(tcp, &buf, 1);

	for (size_t i = 0; i < devc->data_width_bytes; i++)
		send_escaping(tcp,
			devc->trigger_mask_last + devc->data_width_bytes - 1 - i, 1);

	/* Value_last */
	buf = CMD_CFG_TRIGGER;
	tcp_send(tcp, &buf, 1);
	buf = CMD_TRIG_MASKS_LAST;
	tcp_send(tcp, &buf, 1);
	buf = CMD_TRIG_VALUE_LAST;
	tcp_send(tcp, &buf, 1);

	for (size_t i = 0; i < devc->data_width_bytes; i++)
		send_escaping(tcp,
			devc->trigger_value_last + devc->data_width_bytes - 1 - i, 1);

	/* Edge_mask */
	buf = CMD_CFG_TRIGGER;
	tcp_send(tcp, &buf, 1);
	buf = CMD_TRIG_SELECT_EDGE_MASK;
	tcp_send(tcp, &buf, 1);
	buf = CMD_TRIG_SET_EDGE_MASK;
	tcp_send(tcp, &buf, 1);

	for (size_t i = 0; i < devc->data_width_bytes; i++)
		send_escaping(tcp,
			devc->trigger_edge_mask + devc->data_width_bytes - 1 - i, 1);

	return SR_OK;
}

SR_PRIV void ipdbg_la_get_addrwidth_and_datawidth(
	struct ipdbg_la_tcp *tcp, struct dev_context *devc)
{
	uint8_t buf[8];
	uint8_t read_cmd = CMD_GET_BUS_WIDTHS;

	if (tcp_send(tcp, &read_cmd, 1) != SR_OK)
		sr_warn("Can't send read command");

	if (tcp_receive_blocking(tcp, buf, 8) != 8)
		sr_warn("Can't get address and data width from device");

	devc->data_width = buf[0] & 0x000000FF;
	devc->data_width |= (buf[1] << 8) & 0x0000FF00;
	devc->data_width |= (buf[2] << 16) & 0x00FF0000;
	devc->data_width |= (buf[3] << 24) & 0xFF000000;

	devc->addr_width = buf[4] & 0x000000FF;
	devc->addr_width |= (buf[5] << 8) & 0x0000FF00;
	devc->addr_width |= (buf[6] << 16) & 0x00FF0000;
	devc->addr_width |= (buf[7] << 24) & 0xFF000000;

	const uint8_t host_word_size = 8;

	devc->data_width_bytes =
		(devc->data_width + host_word_size - 1) / host_word_size;
	devc->addr_width_bytes =
		(devc->addr_width + host_word_size - 1) / host_word_size;

	devc->limit_samples_max = (0x01 << devc->addr_width);
	devc->limit_samples = devc->limit_samples_max;

	devc->trigger_mask = g_malloc0(devc->data_width_bytes);
	devc->trigger_value = g_malloc0(devc->data_width_bytes);
	devc->trigger_mask_last = g_malloc0(devc->data_width_bytes);
	devc->trigger_value_last = g_malloc0(devc->data_width_bytes);
	devc->trigger_edge_mask = g_malloc0(devc->data_width_bytes);
}

SR_PRIV struct dev_context *ipdbg_la_dev_new(void)
{
	struct dev_context *devc;

	devc = g_malloc0(sizeof(struct dev_context));
	devc->capture_ratio = 50;

	return devc;
}

SR_PRIV int ipdbg_la_send_reset(struct ipdbg_la_tcp *tcp)
{
	uint8_t buf = CMD_RESET;
	if (tcp_send(tcp, &buf, 1) != SR_OK)
		sr_warn("Couldn't send reset");

	return SR_OK;
}

SR_PRIV int ipdbg_la_request_id(struct ipdbg_la_tcp *tcp)
{
	uint8_t buf = CMD_GET_LA_ID;
	if (tcp_send(tcp, &buf, 1) != SR_OK)
		sr_warn("Couldn't send ID request");

	char id[4];
	if (tcp_receive_blocking(tcp, (uint8_t *)id, 4) != 4) {
		sr_err("Couldn't read device ID");
		return SR_ERR;
	}

	if (strncmp(id, "IDBG", 4)) {
		sr_err("Invalid device ID: expected 'IDBG', got '%c%c%c%c'.",
			id[0], id[1], id[2], id[3]);
		return SR_ERR;
	}

	return SR_OK;
}

SR_PRIV void ipdbg_la_abort_acquisition(const struct sr_dev_inst *sdi)
{
	struct ipdbg_la_tcp *tcp = sdi->conn;

	sr_session_source_remove(sdi->session, tcp->socket);

	std_session_send_df_end(sdi);
}

SR_PRIV int ipdbg_la_send_start(struct ipdbg_la_tcp *tcp)
{
	uint8_t buf = CMD_START;

	if (tcp_send(tcp, &buf, 1) != SR_OK)
		sr_warn("Couldn't send start");

	return SR_OK;
}
Commit	Line	Data
a4210e18 EK	1	/*
	2	* This file is part of the libsigrok project.
	3	*
932ef10f	4	* Copyright (C) 2016 Eva Kissling <eva.kissling@bluewin.ch>
a4210e18 EK	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
	20	#include <config.h>
7f4c9a04	21
a4210e18 EK	22	#ifdef _WIN32
	23	#define _WIN32_WINNT 0x0501
	24	#include <winsock2.h>
	25	#include <ws2tcpip.h>
00f0016c	26	#else
a4210e18 EK	27	#include <sys/socket.h>
	28	#include <netinet/in.h>
	29	#include <arpa/inet.h>
	30	#include <netdb.h>
24fbd9f8	31	#include <sys/ioctl.h>
a4210e18	32	#endif
00f0016c UH	33	#include <string.h>
00f0016c UH	34	#include <unistd.h>
a4210e18 EK	35	#include <errno.h>
	36	#include "protocol.h"
	37
7f4c9a04	38	#define BUFFER_SIZE 4
2f15f5bf	39
7f4c9a04 SA	40	/* Top-level command opcodes */
	41	#define CMD_SET_TRIGGER 0x00
	42	#define CMD_CFG_TRIGGER 0xF0
	43	#define CMD_CFG_LA 0x0F
	44	#define CMD_START 0xFE
	45	#define CMD_RESET 0xEE
2f15f5bf	46
7f4c9a04 SA	47	#define CMD_GET_BUS_WIDTHS 0xAA
	48	#define CMD_GET_LA_ID 0xBB
	49	#define CMD_ESCAPE 0x55
2f15f5bf	50
7f4c9a04 SA	51	/* Trigger subfunction command opcodes */
	52	#define CMD_TRIG_MASKS 0xF1
	53	#define CMD_TRIG_MASK 0xF3
	54	#define CMD_TRIG_VALUE 0xF7
2f15f5bf	55
7f4c9a04 SA	56	#define CMD_TRIG_MASKS_LAST 0xF9
	57	#define CMD_TRIG_MASK_LAST 0xFB
	58	#define CMD_TRIG_VALUE_LAST 0xFF
2f15f5bf	59
7f4c9a04 SA	60	#define CMD_TRIG_SELECT_EDGE_MASK 0xF5
7f4c9a04 SA	61	#define CMD_TRIG_SET_EDGE_MASK 0xF6
2f15f5bf	62
7f4c9a04 SA	63	/* LA subfunction command opcodes */
7f4c9a04 SA	64	#define CMD_LA_DELAY 0x1F
a66099c6	65
4d33f5e1	66	static gboolean data_available(struct ipdbg_la_tcp *tcp)
b51288e3	67	{
00f0016c	68	#ifdef _WIN32
3bfdadf6	69	u_long bytes_available;
c54ca323	70	if(ioctlsocket(tcp->socket, FIONREAD, &bytes_available) != 0){
b51288e3	71	#else
c54ca323	72	int bytes_available;
	73	if (ioctl(tcp->socket, FIONREAD, &bytes_available) < 0){ // TIOCMGET
	74	#endif
4838c6ca	75	sr_err("FIONREAD failed: %s\n", g_strerror(errno));
4465837b	76	return FALSE;
9d2e5483	77	}
c54ca323	78	return (bytes_available > 0);
b51288e3 EK	79	}
b51288e3 EK	80
8a9788e2	81	SR_PRIV struct ipdbg_la_tcp *ipdbg_la_tcp_new(void)
a4210e18	82	{
8a9788e2	83	struct ipdbg_la_tcp *tcp;
a4210e18	84
8a9788e2	85	tcp = g_malloc0(sizeof(struct ipdbg_la_tcp));
9d2e5483 SA	86	tcp->address = NULL;
	87	tcp->port = NULL;
	88	tcp->socket = -1;
a4210e18	89
9d2e5483	90	return tcp;
a4210e18 EK	91	}
a4210e18 EK	92
8a9788e2	93	SR_PRIV void ipdbg_la_tcp_free(struct ipdbg_la_tcp *tcp)
7f4c9a04	94	{
9d2e5483 SA	95	g_free(tcp->address);
9d2e5483 SA	96	g_free(tcp->port);
7f4c9a04 SA	97	}
7f4c9a04 SA	98
8a9788e2	99	SR_PRIV int ipdbg_la_tcp_open(struct ipdbg_la_tcp *tcp)
a4210e18	100	{
9d2e5483 SA	101	struct addrinfo hints;
	102	struct addrinfo results, res;
	103	int err;
	104
	105	memset(&hints, 0, sizeof(hints));
	106	hints.ai_family = AF_UNSPEC;
	107	hints.ai_socktype = SOCK_STREAM;
	108	hints.ai_protocol = IPPROTO_TCP;
	109
	110	err = getaddrinfo(tcp->address, tcp->port, &hints, &results);
	111
	112	if (err) {
	113	sr_err("Address lookup failed: %s:%s: %s", tcp->address,
	114	tcp->port, gai_strerror(err));
	115	return SR_ERR;
	116	}
	117
	118	for (res = results; res; res = res->ai_next) {
	119	if ((tcp->socket = socket(res->ai_family, res->ai_socktype,
	120	res->ai_protocol)) < 0)
	121	continue;
	122	if (connect(tcp->socket, res->ai_addr, res->ai_addrlen) != 0) {
	123	close(tcp->socket);
	124	tcp->socket = -1;
	125	continue;
	126	}
	127	break;
	128	}
	129
	130	freeaddrinfo(results);
	131
	132	if (tcp->socket < 0) {
	133	sr_err("Failed to connect to %s:%s: %s", tcp->address, tcp->port,
	134	g_strerror(errno));
	135	return SR_ERR;
	136	}
	137
	138	return SR_OK;
a4210e18 EK	139	}
a4210e18 EK	140
8a9788e2	141	SR_PRIV int ipdbg_la_tcp_close(struct ipdbg_la_tcp *tcp)
7f4c9a04	142	{
9d2e5483	143	int ret = SR_OK;
7f4c9a04	144
c54ca323	145	#ifdef _WIN32
	146	if (shutdown(tcp->socket, SD_SEND) != SOCKET_ERROR)
	147	{
	148	char recvbuf[16];
	149	int recvbuflen = 16;
	150	// Receive until the peer closes the connection
	151	while(recv(tcp->socket, recvbuf, recvbuflen, 0) > 0);
	152	}
	153	#endif
9d2e5483 SA	154	if (close(tcp->socket) < 0)
9d2e5483 SA	155	ret = SR_ERR;
7f4c9a04	156
9d2e5483	157	tcp->socket = -1;
7f4c9a04	158
9d2e5483	159	return ret;
7f4c9a04 SA	160	}
7f4c9a04 SA	161
4d33f5e1	162	static int tcp_send(struct ipdbg_la_tcp tcp, const uint8_t buf, size_t len)
a4210e18	163	{
9d2e5483	164	int out;
9be587a1	165	out = send(tcp->socket, (const char *)buf, len, 0);
a4210e18	166
9d2e5483 SA	167	if (out < 0) {
	168	sr_err("Send error: %s", g_strerror(errno));
	169	return SR_ERR;
	170	}
a4210e18	171
9d2e5483 SA	172	if (out < (int)len)
9d2e5483 SA	173	sr_dbg("Only sent %d/%d bytes of data.", out, (int)len);
a4210e18	174
9d2e5483	175	return SR_OK;
a4210e18 EK	176	}
a4210e18 EK	177
4d33f5e1	178	static int tcp_receive_blocking(struct ipdbg_la_tcp *tcp,
7f4c9a04	179	uint8_t *buf, int bufsize)
a4210e18	180	{
9d2e5483	181	int received = 0;
ed186484	182	int error_count = 0;
7f4c9a04	183
ed186484	184	/* Timeout after 500ms of not receiving data */
8e249032 DA	185	/* increase timeout in case lab is not just beside the office */
	186	while ((received < bufsize) && (error_count < 2000)) {
	187	int recd = ipdbg_la_tcp_receive(tcp, buf, bufsize-received);
	188	if ( recd > 0 ) {
	189	buf += recd;
	190	received += recd;
ed186484 SA	191	} else {
	192	error_count++;
	193	g_usleep(1000); /* Sleep for 1ms */
9d2e5483 SA	194	}
9d2e5483 SA	195	}
7f4c9a04	196
9d2e5483	197	return received;
a4210e18	198	}
7f4c9a04	199
8a9788e2	200	SR_PRIV int ipdbg_la_tcp_receive(struct ipdbg_la_tcp *tcp,
8e249032	201	uint8_t *buf, size_t bufsize)
b51288e3	202	{
9d2e5483	203	int received = 0;
8e249032 DA	204	if (data_available(tcp))
	205	received = recv(tcp->socket, (char *)buf, bufsize, 0);
	206	if (received < 0) {
	207	sr_err("Receive error: %s", g_strerror(errno));
9d2e5483	208	return -1;
8e249032 DA	209	} else
8e249032 DA	210	return received;
a4210e18 EK	211	}
a4210e18 EK	212
8a9788e2	213	SR_PRIV int ipdbg_la_convert_trigger(const struct sr_dev_inst *sdi)
a4210e18	214	{
1f15efc1	215	struct dev_context *devc;
9d2e5483 SA	216	struct sr_trigger *trigger;
	217	struct sr_trigger_stage *stage;
	218	struct sr_trigger_match *match;
	219	const GSList l, m;
	220
	221	devc = sdi->priv;
	222
	223	devc->num_stages = 0;
	224	devc->num_transfers = 0;
	225	devc->raw_sample_buf = NULL;
	226
ac3625be	227	for (uint64_t i = 0; i < devc->data_width_bytes; i++) {
9d2e5483 SA	228	devc->trigger_mask[i] = 0;
	229	devc->trigger_value[i] = 0;
	230	devc->trigger_mask_last[i] = 0;
	231	devc->trigger_value_last[i] = 0;
	232	devc->trigger_edge_mask[i] = 0;
	233	}
	234
	235	if (!(trigger = sr_session_trigger_get(sdi->session)))
	236	return SR_OK;
	237
	238	for (l = trigger->stages; l; l = l->next) {
	239	stage = l->data;
	240	for (m = stage->matches; m; m = m->next) {
	241	match = m->data;
	242	int byte_idx = match->channel->index / 8;
	243	uint8_t match_bit = 1 << (match->channel->index % 8);
	244
	245	if (!match->channel->enabled)
	246	/* Ignore disabled channels with a trigger. */
	247	continue;
	248
	249	if (match->match == SR_TRIGGER_ONE) {
	250	devc->trigger_value[byte_idx] \|= match_bit;
	251	devc->trigger_mask[byte_idx] \|= match_bit;
	252	devc->trigger_mask_last[byte_idx] &= ~match_bit;
	253	devc->trigger_edge_mask[byte_idx] &= ~match_bit;
	254	} else if (match->match == SR_TRIGGER_ZERO) {
	255	devc->trigger_value[byte_idx] &= ~match_bit;
	256	devc->trigger_mask[byte_idx] \|= match_bit;
	257	devc->trigger_mask_last[byte_idx] &= ~match_bit;
	258	devc->trigger_edge_mask[byte_idx] &= ~match_bit;
	259	} else if (match->match == SR_TRIGGER_RISING) {
	260	devc->trigger_value[byte_idx] \|= match_bit;
	261	devc->trigger_value_last[byte_idx] &=
	262	~match_bit;
	263	devc->trigger_mask[byte_idx] \|= match_bit;
	264	devc->trigger_mask_last[byte_idx] \|= match_bit;
	265	devc->trigger_edge_mask[byte_idx] &= ~match_bit;
	266	} else if (match->match == SR_TRIGGER_FALLING) {
	267	devc->trigger_value[byte_idx] &= ~match_bit;
	268	devc->trigger_value_last[byte_idx] \|= match_bit;
	269	devc->trigger_mask[byte_idx] \|= match_bit;
	270	devc->trigger_mask_last[byte_idx] \|= match_bit;
	271	devc->trigger_edge_mask[byte_idx] &= ~match_bit;
	272	} else if (match->match == SR_TRIGGER_EDGE) {
	273	devc->trigger_mask[byte_idx] &= ~match_bit;
	274	devc->trigger_mask_last[byte_idx] &= ~match_bit;
	275	devc->trigger_edge_mask[byte_idx] \|= match_bit;
	276	}
	277	}
	278	}
	279
	280	return SR_OK;
a4210e18 EK	281	}
a4210e18 EK	282
8a9788e2	283	SR_PRIV int ipdbg_la_receive_data(int fd, int revents, void *cb_data)
a4210e18	284	{
9d2e5483	285	const struct sr_dev_inst *sdi;
1f15efc1	286	struct dev_context *devc;
9d2e5483 SA	287
	288	(void)fd;
	289	(void)revents;
	290
703fb454	291	sdi = cb_data;
9d2e5483 SA	292	if (!sdi)
	293	return FALSE;
	294
	295	if (!(devc = sdi->priv))
	296	return FALSE;
	297
8a9788e2	298	struct ipdbg_la_tcp *tcp = sdi->conn;
9d2e5483 SA	299	struct sr_datafeed_packet packet;
	300	struct sr_datafeed_logic logic;
	301
	302	if (!devc->raw_sample_buf) {
	303	devc->raw_sample_buf =
ac3625be	304	g_try_malloc(devc->limit_samples * devc->data_width_bytes);
9d2e5483	305	if (!devc->raw_sample_buf) {
fac36d0a	306	sr_err("Sample buffer malloc failed.");
9d2e5483 SA	307	return FALSE;
	308	}
	309	}
	310
	311	if (devc->num_transfers <
ac3625be	312	(devc->limit_samples_max * devc->data_width_bytes)) {
8e249032 DA	313	const size_t bufsize = 1024;
	314	uint8_t buffer[bufsize];
	315
	316	const int recd = ipdbg_la_tcp_receive(tcp, buffer, bufsize);
	317	if ( recd > 0) {
	318	int num_move = (((devc->num_transfers + recd) <=
	319	(devc->limit_samples * devc->data_width_bytes))
	320	?
	321	recd
	322	:
	323	(int)((devc->limit_samples * devc->data_width_bytes) -
	324	devc->num_transfers));
	325	if ( num_move > 0 )
	326	memcpy(&(devc->raw_sample_buf[devc->num_transfers]),
	327	buffer, num_move);
	328	devc->num_transfers += recd;
9d2e5483 SA	329	}
	330	} else {
	331	if (devc->delay_value > 0) {
	332	/* There are pre-trigger samples, send those first. */
	333	packet.type = SR_DF_LOGIC;
	334	packet.payload = &logic;
ac3625be UH	335	logic.length = devc->delay_value * devc->data_width_bytes;
ac3625be UH	336	logic.unitsize = devc->data_width_bytes;
9d2e5483 SA	337	logic.data = devc->raw_sample_buf;
	338	sr_session_send(cb_data, &packet);
	339	}
	340
	341	/* Send the trigger. */
	342	packet.type = SR_DF_TRIGGER;
	343	sr_session_send(cb_data, &packet);
	344
	345	/* Send post-trigger samples. */
	346	packet.type = SR_DF_LOGIC;
	347	packet.payload = &logic;
	348	logic.length = (devc->limit_samples - devc->delay_value) *
ac3625be UH	349	devc->data_width_bytes;
ac3625be UH	350	logic.unitsize = devc->data_width_bytes;
9d2e5483	351	logic.data = devc->raw_sample_buf +
ac3625be	352	(devc->delay_value * devc->data_width_bytes);
9d2e5483 SA	353	sr_session_send(cb_data, &packet);
	354
	355	g_free(devc->raw_sample_buf);
	356	devc->raw_sample_buf = NULL;
	357
8a9788e2	358	ipdbg_la_abort_acquisition(sdi);
9d2e5483 SA	359	}
	360
	361	return TRUE;
a4210e18 EK	362	}
a4210e18 EK	363
4d33f5e1 UH	364	static int send_escaping(struct ipdbg_la_tcp tcp, uint8_t data_to_send,
	365	uint32_t length)
	366	{
	367	uint8_t escape = CMD_ESCAPE;
	368
	369	while (length--) {
	370	uint8_t payload = *data_to_send++;
	371
	372	if (payload == CMD_RESET)
	373	if (tcp_send(tcp, &escape, 1) != SR_OK)
	374	sr_warn("Couldn't send escape");
	375
	376	if (payload == CMD_ESCAPE)
	377	if (tcp_send(tcp, &escape, 1) != SR_OK)
	378	sr_warn("Couldn't send escape");
	379
	380	if (tcp_send(tcp, &payload, 1) != SR_OK)
	381	sr_warn("Couldn't send data");
	382	}
	383
	384	return SR_OK;
	385	}
	386
1f15efc1	387	SR_PRIV int ipdbg_la_send_delay(struct dev_context *devc,
8a9788e2	388	struct ipdbg_la_tcp *tcp)
a4210e18	389	{
9d2e5483	390	devc->delay_value = (devc->limit_samples / 100.0) * devc->capture_ratio;
a4210e18	391
9d2e5483 SA	392	uint8_t buf;
9d2e5483 SA	393	buf = CMD_CFG_LA;
4d33f5e1	394	tcp_send(tcp, &buf, 1);
9d2e5483	395	buf = CMD_LA_DELAY;
4d33f5e1	396	tcp_send(tcp, &buf, 1);
a4210e18	397
9d2e5483 SA	398	uint8_t delay_buf[4] = { devc->delay_value & 0x000000ff,
	399	(devc->delay_value >> 8) & 0x000000ff,
	400	(devc->delay_value >> 16) & 0x000000ff,
	401	(devc->delay_value >> 24) & 0x000000ff
	402	};
a4210e18	403
ac3625be UH	404	for (uint64_t i = 0; i < devc->addr_width_bytes; i++)
ac3625be UH	405	send_escaping(tcp, &(delay_buf[devc->addr_width_bytes - 1 - i]), 1);
a4210e18	406
9d2e5483	407	return SR_OK;
a4210e18 EK	408	}
a4210e18 EK	409
1f15efc1	410	SR_PRIV int ipdbg_la_send_trigger(struct dev_context *devc,
8a9788e2	411	struct ipdbg_la_tcp *tcp)
a4210e18	412	{
9d2e5483 SA	413	uint8_t buf;
	414
	415	/* Mask */
	416	buf = CMD_CFG_TRIGGER;
4d33f5e1	417	tcp_send(tcp, &buf, 1);
9d2e5483	418	buf = CMD_TRIG_MASKS;
4d33f5e1	419	tcp_send(tcp, &buf, 1);
9d2e5483	420	buf = CMD_TRIG_MASK;
4d33f5e1	421	tcp_send(tcp, &buf, 1);
9d2e5483	422
ac3625be	423	for (size_t i = 0; i < devc->data_width_bytes; i++)
9d2e5483	424	send_escaping(tcp,
ac3625be	425	devc->trigger_mask + devc->data_width_bytes - 1 - i, 1);
9d2e5483 SA	426
	427	/* Value */
	428	buf = CMD_CFG_TRIGGER;
4d33f5e1	429	tcp_send(tcp, &buf, 1);
9d2e5483	430	buf = CMD_TRIG_MASKS;
4d33f5e1	431	tcp_send(tcp, &buf, 1);
9d2e5483	432	buf = CMD_TRIG_VALUE;
4d33f5e1	433	tcp_send(tcp, &buf, 1);
9d2e5483	434
ac3625be	435	for (size_t i = 0; i < devc->data_width_bytes; i++)
9d2e5483	436	send_escaping(tcp,
ac3625be	437	devc->trigger_value + devc->data_width_bytes - 1 - i, 1);
9d2e5483 SA	438
	439	/* Mask_last */
	440	buf = CMD_CFG_TRIGGER;
4d33f5e1	441	tcp_send(tcp, &buf, 1);
9d2e5483	442	buf = CMD_TRIG_MASKS_LAST;
4d33f5e1	443	tcp_send(tcp, &buf, 1);
9d2e5483	444	buf = CMD_TRIG_MASK_LAST;
4d33f5e1	445	tcp_send(tcp, &buf, 1);
9d2e5483	446
ac3625be	447	for (size_t i = 0; i < devc->data_width_bytes; i++)
9d2e5483	448	send_escaping(tcp,
ac3625be	449	devc->trigger_mask_last + devc->data_width_bytes - 1 - i, 1);
9d2e5483 SA	450
	451	/* Value_last */
	452	buf = CMD_CFG_TRIGGER;
4d33f5e1	453	tcp_send(tcp, &buf, 1);
9d2e5483	454	buf = CMD_TRIG_MASKS_LAST;
4d33f5e1	455	tcp_send(tcp, &buf, 1);
9d2e5483	456	buf = CMD_TRIG_VALUE_LAST;
4d33f5e1	457	tcp_send(tcp, &buf, 1);
9d2e5483	458
ac3625be	459	for (size_t i = 0; i < devc->data_width_bytes; i++)
9d2e5483	460	send_escaping(tcp,
ac3625be	461	devc->trigger_value_last + devc->data_width_bytes - 1 - i, 1);
9d2e5483 SA	462
	463	/* Edge_mask */
	464	buf = CMD_CFG_TRIGGER;
4d33f5e1	465	tcp_send(tcp, &buf, 1);
9d2e5483	466	buf = CMD_TRIG_SELECT_EDGE_MASK;
4d33f5e1	467	tcp_send(tcp, &buf, 1);
9d2e5483	468	buf = CMD_TRIG_SET_EDGE_MASK;
4d33f5e1	469	tcp_send(tcp, &buf, 1);
9d2e5483	470
ac3625be	471	for (size_t i = 0; i < devc->data_width_bytes; i++)
9d2e5483	472	send_escaping(tcp,
ac3625be	473	devc->trigger_edge_mask + devc->data_width_bytes - 1 - i, 1);
9d2e5483 SA	474
9d2e5483 SA	475	return SR_OK;
a4210e18 EK	476	}
a4210e18 EK	477
8a9788e2	478	SR_PRIV void ipdbg_la_get_addrwidth_and_datawidth(
1f15efc1	479	struct ipdbg_la_tcp tcp, struct dev_context devc)
a4210e18	480	{
9d2e5483 SA	481	uint8_t buf[8];
9d2e5483 SA	482	uint8_t read_cmd = CMD_GET_BUS_WIDTHS;
a4210e18	483
4d33f5e1	484	if (tcp_send(tcp, &read_cmd, 1) != SR_OK)
9d2e5483	485	sr_warn("Can't send read command");
a4210e18	486
4d33f5e1	487	if (tcp_receive_blocking(tcp, buf, 8) != 8)
9d2e5483	488	sr_warn("Can't get address and data width from device");
b51288e3	489
ac3625be UH	490	devc->data_width = buf[0] & 0x000000FF;
	491	devc->data_width \|= (buf[1] << 8) & 0x0000FF00;
	492	devc->data_width \|= (buf[2] << 16) & 0x00FF0000;
	493	devc->data_width \|= (buf[3] << 24) & 0xFF000000;
a4210e18	494
ac3625be UH	495	devc->addr_width = buf[4] & 0x000000FF;
	496	devc->addr_width \|= (buf[5] << 8) & 0x0000FF00;
	497	devc->addr_width \|= (buf[6] << 16) & 0x00FF0000;
	498	devc->addr_width \|= (buf[7] << 24) & 0xFF000000;
a4210e18	499
ac3625be	500	const uint8_t host_word_size = 8;
a4210e18	501
ac3625be UH	502	devc->data_width_bytes =
	503	(devc->data_width + host_word_size - 1) / host_word_size;
	504	devc->addr_width_bytes =
	505	(devc->addr_width + host_word_size - 1) / host_word_size;
a4210e18	506
ac3625be	507	devc->limit_samples_max = (0x01 << devc->addr_width);
9d2e5483 SA	508	devc->limit_samples = devc->limit_samples_max;
9d2e5483 SA	509
ac3625be UH	510	devc->trigger_mask = g_malloc0(devc->data_width_bytes);
	511	devc->trigger_value = g_malloc0(devc->data_width_bytes);
	512	devc->trigger_mask_last = g_malloc0(devc->data_width_bytes);
	513	devc->trigger_value_last = g_malloc0(devc->data_width_bytes);
	514	devc->trigger_edge_mask = g_malloc0(devc->data_width_bytes);
a4210e18 EK	515	}
a4210e18 EK	516
1f15efc1	517	SR_PRIV struct dev_context *ipdbg_la_dev_new(void)
a4210e18	518	{
1f15efc1	519	struct dev_context *devc;
a4210e18	520
1f15efc1	521	devc = g_malloc0(sizeof(struct dev_context));
9d2e5483	522	devc->capture_ratio = 50;
a4210e18	523
9d2e5483	524	return devc;
a4210e18 EK	525	}
a4210e18 EK	526
8a9788e2	527	SR_PRIV int ipdbg_la_send_reset(struct ipdbg_la_tcp *tcp)
a4210e18	528	{
9d2e5483	529	uint8_t buf = CMD_RESET;
4d33f5e1	530	if (tcp_send(tcp, &buf, 1) != SR_OK)
9d2e5483	531	sr_warn("Couldn't send reset");
7f4c9a04	532
9d2e5483	533	return SR_OK;
a4210e18 EK	534	}
a4210e18 EK	535
8a9788e2	536	SR_PRIV int ipdbg_la_request_id(struct ipdbg_la_tcp *tcp)
a4210e18	537	{
9d2e5483	538	uint8_t buf = CMD_GET_LA_ID;
4d33f5e1	539	if (tcp_send(tcp, &buf, 1) != SR_OK)
9d2e5483	540	sr_warn("Couldn't send ID request");
a4210e18	541
9d2e5483	542	char id[4];
4d33f5e1	543	if (tcp_receive_blocking(tcp, (uint8_t *)id, 4) != 4) {
ed186484 SA	544	sr_err("Couldn't read device ID");
	545	return SR_ERR;
	546	}
a4210e18	547
9d2e5483 SA	548	if (strncmp(id, "IDBG", 4)) {
	549	sr_err("Invalid device ID: expected 'IDBG', got '%c%c%c%c'.",
	550	id[0], id[1], id[2], id[3]);
	551	return SR_ERR;
	552	}
a4210e18	553
9d2e5483	554	return SR_OK;
a4210e18 EK	555	}
a4210e18 EK	556
8a9788e2	557	SR_PRIV void ipdbg_la_abort_acquisition(const struct sr_dev_inst *sdi)
a4210e18	558	{
8a9788e2	559	struct ipdbg_la_tcp *tcp = sdi->conn;
a4210e18	560
9d2e5483	561	sr_session_source_remove(sdi->session, tcp->socket);
a4210e18	562
9d2e5483	563	std_session_send_df_end(sdi);
a4210e18 EK	564	}
a4210e18 EK	565
8a9788e2	566	SR_PRIV int ipdbg_la_send_start(struct ipdbg_la_tcp *tcp)
a4210e18	567	{
9d2e5483	568	uint8_t buf = CMD_START;
a4210e18	569
4d33f5e1	570	if (tcp_send(tcp, &buf, 1) != SR_OK)
9d2e5483	571	sr_warn("Couldn't send start");
7f4c9a04	572
9d2e5483	573	return SR_OK;
a4210e18	574	}