[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>
#endif

#include <errno.h>
#include "protocol.h"

#include <sys/ioctl.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__
	ioctlsocket(tcp->socket, FIONREAD, &bytes_available);
#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  // __WIN32__
}

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