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