[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>
#endif

#include <string.h>
#include <unistd.h>

#ifndef _WIN32
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <sys/ioctl.h>
#endif

#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;
	ioctlsocket(tcp->socket, FIONREAD, &bytes_available);
	return (bytes_available > 0);
#else
	int status;

	if (ioctl(tcp->socket, FIONREAD, &status) < 0) {	// TIOCMGET
		sr_err("FIONREAD failed: %s\n", g_strerror(errno));
		return FALSE;
	}

	return (status < 1) ? FALSE : TRUE;
#endif
}

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;

	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, 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 */
	while ((received < bufsize) && (error_count < 500)) {
		if (ipdbg_la_tcp_receive(tcp, buf) > 0) {
			buf++;
			received++;
		} 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)
{
	int received = 0;

	if (data_available(tcp)) {
		while (received < 1) {
			int len = recv(tcp->socket, buf, 1, 0);

			if (len < 0) {
				sr_err("Receive error: %s", g_strerror(errno));
				return SR_ERR;
			} else
				received += len;
		}

		return received;
	} else
		return -1;
}

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)) {
		uint8_t byte;

		if (ipdbg_la_tcp_receive(tcp, &byte) == 1) {
			if (devc->num_transfers <
				(devc->limit_samples * devc->data_width_bytes))
				devc->raw_sample_buf[devc->num_transfers] = byte;

			devc->num_transfers++;
		}
	} 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
	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2016 Eva Kissling <eva.kissling@bluewin.ch>
	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>
	21
	22	#ifdef _WIN32
	23	#define _WIN32_WINNT 0x0501
	24	#include <winsock2.h>
	25	#include <ws2tcpip.h>
	26	#endif
	27
	28	#include <string.h>
	29	#include <unistd.h>
	30
	31	#ifndef _WIN32
	32	#include <sys/socket.h>
	33	#include <netinet/in.h>
	34	#include <arpa/inet.h>
	35	#include <netdb.h>
	36	#include <sys/ioctl.h>
	37	#endif
	38
	39	#include <errno.h>
	40	#include "protocol.h"
	41
	42	#define BUFFER_SIZE 4
	43
	44	/* Top-level command opcodes */
	45	#define CMD_SET_TRIGGER 0x00
	46	#define CMD_CFG_TRIGGER 0xF0
	47	#define CMD_CFG_LA 0x0F
	48	#define CMD_START 0xFE
	49	#define CMD_RESET 0xEE
	50
	51	#define CMD_GET_BUS_WIDTHS 0xAA
	52	#define CMD_GET_LA_ID 0xBB
	53	#define CMD_ESCAPE 0x55
	54
	55	/* Trigger subfunction command opcodes */
	56	#define CMD_TRIG_MASKS 0xF1
	57	#define CMD_TRIG_MASK 0xF3
	58	#define CMD_TRIG_VALUE 0xF7
	59
	60	#define CMD_TRIG_MASKS_LAST 0xF9
	61	#define CMD_TRIG_MASK_LAST 0xFB
	62	#define CMD_TRIG_VALUE_LAST 0xFF
	63
	64	#define CMD_TRIG_SELECT_EDGE_MASK 0xF5
	65	#define CMD_TRIG_SET_EDGE_MASK 0xF6
	66
	67	/* LA subfunction command opcodes */
	68	#define CMD_LA_DELAY 0x1F
	69
	70	static gboolean data_available(struct ipdbg_la_tcp *tcp)
	71	{
	72	#ifdef __WIN32__
	73	u_long bytes_available;
	74	ioctlsocket(tcp->socket, FIONREAD, &bytes_available);
	75	return (bytes_available > 0);
	76	#else
	77	int status;
	78
	79	if (ioctl(tcp->socket, FIONREAD, &status) < 0) { // TIOCMGET
	80	sr_err("FIONREAD failed: %s\n", g_strerror(errno));
	81	return FALSE;
	82	}
	83
	84	return (status < 1) ? FALSE : TRUE;
	85	#endif
	86	}
	87
	88	SR_PRIV struct ipdbg_la_tcp *ipdbg_la_tcp_new(void)
	89	{
	90	struct ipdbg_la_tcp *tcp;
	91
	92	tcp = g_malloc0(sizeof(struct ipdbg_la_tcp));
	93	tcp->address = NULL;
	94	tcp->port = NULL;
	95	tcp->socket = -1;
	96
	97	return tcp;
	98	}
	99
	100	SR_PRIV void ipdbg_la_tcp_free(struct ipdbg_la_tcp *tcp)
	101	{
	102	g_free(tcp->address);
	103	g_free(tcp->port);
	104	}
	105
	106	SR_PRIV int ipdbg_la_tcp_open(struct ipdbg_la_tcp *tcp)
	107	{
	108	struct addrinfo hints;
	109	struct addrinfo results, res;
	110	int err;
	111
	112	memset(&hints, 0, sizeof(hints));
	113	hints.ai_family = AF_UNSPEC;
	114	hints.ai_socktype = SOCK_STREAM;
	115	hints.ai_protocol = IPPROTO_TCP;
	116
	117	err = getaddrinfo(tcp->address, tcp->port, &hints, &results);
	118
	119	if (err) {
	120	sr_err("Address lookup failed: %s:%s: %s", tcp->address,
	121	tcp->port, gai_strerror(err));
	122	return SR_ERR;
	123	}
	124
	125	for (res = results; res; res = res->ai_next) {
	126	if ((tcp->socket = socket(res->ai_family, res->ai_socktype,
	127	res->ai_protocol)) < 0)
	128	continue;
	129	if (connect(tcp->socket, res->ai_addr, res->ai_addrlen) != 0) {
	130	close(tcp->socket);
	131	tcp->socket = -1;
	132	continue;
	133	}
	134	break;
	135	}
	136
	137	freeaddrinfo(results);
	138
	139	if (tcp->socket < 0) {
	140	sr_err("Failed to connect to %s:%s: %s", tcp->address, tcp->port,
	141	g_strerror(errno));
	142	return SR_ERR;
	143	}
	144
	145	return SR_OK;
	146	}
	147
	148	SR_PRIV int ipdbg_la_tcp_close(struct ipdbg_la_tcp *tcp)
	149	{
	150	int ret = SR_OK;
	151
	152	if (close(tcp->socket) < 0)
	153	ret = SR_ERR;
	154
	155	tcp->socket = -1;
	156
	157	return ret;
	158	}
	159
	160	static int tcp_send(struct ipdbg_la_tcp tcp, const uint8_t buf, size_t len)
	161	{
	162	int out;
	163	out = send(tcp->socket, buf, len, 0);
	164
	165	if (out < 0) {
	166	sr_err("Send error: %s", g_strerror(errno));
	167	return SR_ERR;
	168	}
	169
	170	if (out < (int)len)
	171	sr_dbg("Only sent %d/%d bytes of data.", out, (int)len);
	172
	173	return SR_OK;
	174	}
	175
	176	static int tcp_receive_blocking(struct ipdbg_la_tcp *tcp,
	177	uint8_t *buf, int bufsize)
	178	{
	179	int received = 0;
	180	int error_count = 0;
	181
	182	/* Timeout after 500ms of not receiving data */
	183	while ((received < bufsize) && (error_count < 500)) {
	184	if (ipdbg_la_tcp_receive(tcp, buf) > 0) {
	185	buf++;
	186	received++;
	187	} else {
	188	error_count++;
	189	g_usleep(1000); /* Sleep for 1ms */
	190	}
	191	}
	192
	193	return received;
	194	}
	195
	196	SR_PRIV int ipdbg_la_tcp_receive(struct ipdbg_la_tcp *tcp,
	197	uint8_t *buf)
	198	{
	199	int received = 0;
	200
	201	if (data_available(tcp)) {
	202	while (received < 1) {
	203	int len = recv(tcp->socket, buf, 1, 0);
	204
	205	if (len < 0) {
	206	sr_err("Receive error: %s", g_strerror(errno));
	207	return SR_ERR;
	208	} else
	209	received += len;
	210	}
	211
	212	return received;
	213	} else
	214	return -1;
	215	}
	216
	217	SR_PRIV int ipdbg_la_convert_trigger(const struct sr_dev_inst *sdi)
	218	{
	219	struct dev_context *devc;
	220	struct sr_trigger *trigger;
	221	struct sr_trigger_stage *stage;
	222	struct sr_trigger_match *match;
	223	const GSList l, m;
	224
	225	devc = sdi->priv;
	226
	227	devc->num_stages = 0;
	228	devc->num_transfers = 0;
	229	devc->raw_sample_buf = NULL;
	230
	231	for (uint64_t i = 0; i < devc->data_width_bytes; i++) {
	232	devc->trigger_mask[i] = 0;
	233	devc->trigger_value[i] = 0;
	234	devc->trigger_mask_last[i] = 0;
	235	devc->trigger_value_last[i] = 0;
	236	devc->trigger_edge_mask[i] = 0;
	237	}
	238
	239	if (!(trigger = sr_session_trigger_get(sdi->session)))
	240	return SR_OK;
	241
	242	for (l = trigger->stages; l; l = l->next) {
	243	stage = l->data;
	244	for (m = stage->matches; m; m = m->next) {
	245	match = m->data;
	246	int byte_idx = match->channel->index / 8;
	247	uint8_t match_bit = 1 << (match->channel->index % 8);
	248
	249	if (!match->channel->enabled)
	250	/* Ignore disabled channels with a trigger. */
	251	continue;
	252
	253	if (match->match == SR_TRIGGER_ONE) {
	254	devc->trigger_value[byte_idx] \|= match_bit;
	255	devc->trigger_mask[byte_idx] \|= match_bit;
	256	devc->trigger_mask_last[byte_idx] &= ~match_bit;
	257	devc->trigger_edge_mask[byte_idx] &= ~match_bit;
	258	} else if (match->match == SR_TRIGGER_ZERO) {
	259	devc->trigger_value[byte_idx] &= ~match_bit;
	260	devc->trigger_mask[byte_idx] \|= match_bit;
	261	devc->trigger_mask_last[byte_idx] &= ~match_bit;
	262	devc->trigger_edge_mask[byte_idx] &= ~match_bit;
	263	} else if (match->match == SR_TRIGGER_RISING) {
	264	devc->trigger_value[byte_idx] \|= match_bit;
	265	devc->trigger_value_last[byte_idx] &=
	266	~match_bit;
	267	devc->trigger_mask[byte_idx] \|= match_bit;
	268	devc->trigger_mask_last[byte_idx] \|= match_bit;
	269	devc->trigger_edge_mask[byte_idx] &= ~match_bit;
	270	} else if (match->match == SR_TRIGGER_FALLING) {
	271	devc->trigger_value[byte_idx] &= ~match_bit;
	272	devc->trigger_value_last[byte_idx] \|= match_bit;
	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	} else if (match->match == SR_TRIGGER_EDGE) {
	277	devc->trigger_mask[byte_idx] &= ~match_bit;
	278	devc->trigger_mask_last[byte_idx] &= ~match_bit;
	279	devc->trigger_edge_mask[byte_idx] \|= match_bit;
	280	}
	281	}
	282	}
	283
	284	return SR_OK;
	285	}
	286
	287	SR_PRIV int ipdbg_la_receive_data(int fd, int revents, void *cb_data)
	288	{
	289	const struct sr_dev_inst *sdi;
	290	struct dev_context *devc;
	291
	292	(void)fd;
	293	(void)revents;
	294
	295	sdi = cb_data;
	296	if (!sdi)
	297	return FALSE;
	298
	299	if (!(devc = sdi->priv))
	300	return FALSE;
	301
	302	struct ipdbg_la_tcp *tcp = sdi->conn;
	303	struct sr_datafeed_packet packet;
	304	struct sr_datafeed_logic logic;
	305
	306	if (!devc->raw_sample_buf) {
	307	devc->raw_sample_buf =
	308	g_try_malloc(devc->limit_samples * devc->data_width_bytes);
	309	if (!devc->raw_sample_buf) {
	310	sr_err("Sample buffer malloc failed.");
	311	return FALSE;
	312	}
	313	}
	314
	315	if (devc->num_transfers <
	316	(devc->limit_samples_max * devc->data_width_bytes)) {
	317	uint8_t byte;
	318
	319	if (ipdbg_la_tcp_receive(tcp, &byte) == 1) {
	320	if (devc->num_transfers <
	321	(devc->limit_samples * devc->data_width_bytes))
	322	devc->raw_sample_buf[devc->num_transfers] = byte;
	323
	324	devc->num_transfers++;
	325	}
	326	} else {
	327	if (devc->delay_value > 0) {
	328	/* There are pre-trigger samples, send those first. */
	329	packet.type = SR_DF_LOGIC;
	330	packet.payload = &logic;
	331	logic.length = devc->delay_value * devc->data_width_bytes;
	332	logic.unitsize = devc->data_width_bytes;
	333	logic.data = devc->raw_sample_buf;
	334	sr_session_send(cb_data, &packet);
	335	}
	336
	337	/* Send the trigger. */
	338	packet.type = SR_DF_TRIGGER;
	339	sr_session_send(cb_data, &packet);
	340
	341	/* Send post-trigger samples. */
	342	packet.type = SR_DF_LOGIC;
	343	packet.payload = &logic;
	344	logic.length = (devc->limit_samples - devc->delay_value) *
	345	devc->data_width_bytes;
	346	logic.unitsize = devc->data_width_bytes;
	347	logic.data = devc->raw_sample_buf +
	348	(devc->delay_value * devc->data_width_bytes);
	349	sr_session_send(cb_data, &packet);
	350
	351	g_free(devc->raw_sample_buf);
	352	devc->raw_sample_buf = NULL;
	353
	354	ipdbg_la_abort_acquisition(sdi);
	355	}
	356
	357	return TRUE;
	358	}
	359
	360	static int send_escaping(struct ipdbg_la_tcp tcp, uint8_t data_to_send,
	361	uint32_t length)
	362	{
	363	uint8_t escape = CMD_ESCAPE;
	364
	365	while (length--) {
	366	uint8_t payload = *data_to_send++;
	367
	368	if (payload == CMD_RESET)
	369	if (tcp_send(tcp, &escape, 1) != SR_OK)
	370	sr_warn("Couldn't send escape");
	371
	372	if (payload == CMD_ESCAPE)
	373	if (tcp_send(tcp, &escape, 1) != SR_OK)
	374	sr_warn("Couldn't send escape");
	375
	376	if (tcp_send(tcp, &payload, 1) != SR_OK)
	377	sr_warn("Couldn't send data");
	378	}
	379
	380	return SR_OK;
	381	}
	382
	383	SR_PRIV int ipdbg_la_send_delay(struct dev_context *devc,
	384	struct ipdbg_la_tcp *tcp)
	385	{
	386	devc->delay_value = (devc->limit_samples / 100.0) * devc->capture_ratio;
	387
	388	uint8_t buf;
	389	buf = CMD_CFG_LA;
	390	tcp_send(tcp, &buf, 1);
	391	buf = CMD_LA_DELAY;
	392	tcp_send(tcp, &buf, 1);
	393
	394	uint8_t delay_buf[4] = { devc->delay_value & 0x000000ff,
	395	(devc->delay_value >> 8) & 0x000000ff,
	396	(devc->delay_value >> 16) & 0x000000ff,
	397	(devc->delay_value >> 24) & 0x000000ff
	398	};
	399
	400	for (uint64_t i = 0; i < devc->addr_width_bytes; i++)
	401	send_escaping(tcp, &(delay_buf[devc->addr_width_bytes - 1 - i]), 1);
	402
	403	return SR_OK;
	404	}
	405
	406	SR_PRIV int ipdbg_la_send_trigger(struct dev_context *devc,
	407	struct ipdbg_la_tcp *tcp)
	408	{
	409	uint8_t buf;
	410
	411	/* Mask */
	412	buf = CMD_CFG_TRIGGER;
	413	tcp_send(tcp, &buf, 1);
	414	buf = CMD_TRIG_MASKS;
	415	tcp_send(tcp, &buf, 1);
	416	buf = CMD_TRIG_MASK;
	417	tcp_send(tcp, &buf, 1);
	418
	419	for (size_t i = 0; i < devc->data_width_bytes; i++)
	420	send_escaping(tcp,
	421	devc->trigger_mask + devc->data_width_bytes - 1 - i, 1);
	422
	423	/* Value */
	424	buf = CMD_CFG_TRIGGER;
	425	tcp_send(tcp, &buf, 1);
	426	buf = CMD_TRIG_MASKS;
	427	tcp_send(tcp, &buf, 1);
	428	buf = CMD_TRIG_VALUE;
	429	tcp_send(tcp, &buf, 1);
	430
	431	for (size_t i = 0; i < devc->data_width_bytes; i++)
	432	send_escaping(tcp,
	433	devc->trigger_value + devc->data_width_bytes - 1 - i, 1);
	434
	435	/* Mask_last */
	436	buf = CMD_CFG_TRIGGER;
	437	tcp_send(tcp, &buf, 1);
	438	buf = CMD_TRIG_MASKS_LAST;
	439	tcp_send(tcp, &buf, 1);
	440	buf = CMD_TRIG_MASK_LAST;
	441	tcp_send(tcp, &buf, 1);
	442
	443	for (size_t i = 0; i < devc->data_width_bytes; i++)
	444	send_escaping(tcp,
	445	devc->trigger_mask_last + devc->data_width_bytes - 1 - i, 1);
	446
	447	/* Value_last */
	448	buf = CMD_CFG_TRIGGER;
	449	tcp_send(tcp, &buf, 1);
	450	buf = CMD_TRIG_MASKS_LAST;
	451	tcp_send(tcp, &buf, 1);
	452	buf = CMD_TRIG_VALUE_LAST;
	453	tcp_send(tcp, &buf, 1);
	454
	455	for (size_t i = 0; i < devc->data_width_bytes; i++)
	456	send_escaping(tcp,
	457	devc->trigger_value_last + devc->data_width_bytes - 1 - i, 1);
	458
	459	/* Edge_mask */
	460	buf = CMD_CFG_TRIGGER;
	461	tcp_send(tcp, &buf, 1);
	462	buf = CMD_TRIG_SELECT_EDGE_MASK;
	463	tcp_send(tcp, &buf, 1);
	464	buf = CMD_TRIG_SET_EDGE_MASK;
	465	tcp_send(tcp, &buf, 1);
	466
	467	for (size_t i = 0; i < devc->data_width_bytes; i++)
	468	send_escaping(tcp,
	469	devc->trigger_edge_mask + devc->data_width_bytes - 1 - i, 1);
	470
	471	return SR_OK;
	472	}
	473
	474	SR_PRIV void ipdbg_la_get_addrwidth_and_datawidth(
	475	struct ipdbg_la_tcp tcp, struct dev_context devc)
	476	{
	477	uint8_t buf[8];
	478	uint8_t read_cmd = CMD_GET_BUS_WIDTHS;
	479
	480	if (tcp_send(tcp, &read_cmd, 1) != SR_OK)
	481	sr_warn("Can't send read command");
	482
	483	if (tcp_receive_blocking(tcp, buf, 8) != 8)
	484	sr_warn("Can't get address and data width from device");
	485
	486	devc->data_width = buf[0] & 0x000000FF;
	487	devc->data_width \|= (buf[1] << 8) & 0x0000FF00;
	488	devc->data_width \|= (buf[2] << 16) & 0x00FF0000;
	489	devc->data_width \|= (buf[3] << 24) & 0xFF000000;
	490
	491	devc->addr_width = buf[4] & 0x000000FF;
	492	devc->addr_width \|= (buf[5] << 8) & 0x0000FF00;
	493	devc->addr_width \|= (buf[6] << 16) & 0x00FF0000;
	494	devc->addr_width \|= (buf[7] << 24) & 0xFF000000;
	495
	496	const uint8_t host_word_size = 8;
	497
	498	devc->data_width_bytes =
	499	(devc->data_width + host_word_size - 1) / host_word_size;
	500	devc->addr_width_bytes =
	501	(devc->addr_width + host_word_size - 1) / host_word_size;
	502
	503	devc->limit_samples_max = (0x01 << devc->addr_width);
	504	devc->limit_samples = devc->limit_samples_max;
	505
	506	devc->trigger_mask = g_malloc0(devc->data_width_bytes);
	507	devc->trigger_value = g_malloc0(devc->data_width_bytes);
	508	devc->trigger_mask_last = g_malloc0(devc->data_width_bytes);
	509	devc->trigger_value_last = g_malloc0(devc->data_width_bytes);
	510	devc->trigger_edge_mask = g_malloc0(devc->data_width_bytes);
	511	}
	512
	513	SR_PRIV struct dev_context *ipdbg_la_dev_new(void)
	514	{
	515	struct dev_context *devc;
	516
	517	devc = g_malloc0(sizeof(struct dev_context));
	518	devc->capture_ratio = 50;
	519
	520	return devc;
	521	}
	522
	523	SR_PRIV int ipdbg_la_send_reset(struct ipdbg_la_tcp *tcp)
	524	{
	525	uint8_t buf = CMD_RESET;
	526	if (tcp_send(tcp, &buf, 1) != SR_OK)
	527	sr_warn("Couldn't send reset");
	528
	529	return SR_OK;
	530	}
	531
	532	SR_PRIV int ipdbg_la_request_id(struct ipdbg_la_tcp *tcp)
	533	{
	534	uint8_t buf = CMD_GET_LA_ID;
	535	if (tcp_send(tcp, &buf, 1) != SR_OK)
	536	sr_warn("Couldn't send ID request");
	537
	538	char id[4];
	539	if (tcp_receive_blocking(tcp, (uint8_t *)id, 4) != 4) {
	540	sr_err("Couldn't read device ID");
	541	return SR_ERR;
	542	}
	543
	544	if (strncmp(id, "IDBG", 4)) {
	545	sr_err("Invalid device ID: expected 'IDBG', got '%c%c%c%c'.",
	546	id[0], id[1], id[2], id[3]);
	547	return SR_ERR;
	548	}
	549
	550	return SR_OK;
	551	}
	552
	553	SR_PRIV void ipdbg_la_abort_acquisition(const struct sr_dev_inst *sdi)
	554	{
	555	struct ipdbg_la_tcp *tcp = sdi->conn;
	556
	557	sr_session_source_remove(sdi->session, tcp->socket);
	558
	559	std_session_send_df_end(sdi);
	560	}
	561
	562	SR_PRIV int ipdbg_la_send_start(struct ipdbg_la_tcp *tcp)
	563	{
	564	uint8_t buf = CMD_START;
	565
	566	if (tcp_send(tcp, &buf, 1) != SR_OK)
	567	sr_warn("Couldn't send start");
	568
	569	return SR_OK;
	570	}