[libsigrok.git] / src / serial_libsp.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com>
 * Copyright (C) 2010-2012 Uwe Hermann <uwe@hermann-uwe.de>
 * Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.com>
 * Copyright (C) 2014 Uffe Jakobsen <uffe@uffe.org>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <config.h>
#include <glib.h>
#include <libsigrok/libsigrok.h>
#include "libsigrok-internal.h"
#ifdef HAVE_LIBSERIALPORT
#include <libserialport.h>
#endif
#ifdef G_OS_WIN32
#include <windows.h> /* for HANDLE */
#endif

#define LOG_PREFIX "serial-libsp"

/**
 * @file
 *
 * Serial port handling, wraps the external libserialport dependency.
 */

#ifdef HAVE_LIBSERIALPORT

/**
 * @defgroup grp_serial_libsp Serial port handling, libserialport group
 *
 * Serial port handling functions, based on libserialport.
 *
 * @{
 */

static int sr_ser_libsp_open(struct sr_serial_dev_inst *serial, int flags)
{
	int ret;
	char *error;
	int sp_flags;

	sp_get_port_by_name(serial->port, &serial->sp_data);

	sp_flags = 0;
	if (flags & SERIAL_RDWR)
		sp_flags = (SP_MODE_READ | SP_MODE_WRITE);
	else if (flags & SERIAL_RDONLY)
		sp_flags = SP_MODE_READ;

	ret = sp_open(serial->sp_data, sp_flags);

	switch (ret) {
	case SP_ERR_ARG:
		sr_err("Attempt to open serial port with invalid parameters.");
		return SR_ERR_ARG;
	case SP_ERR_FAIL:
		error = sp_last_error_message();
		sr_err("Error opening port (%d): %s.",
			sp_last_error_code(), error);
		sp_free_error_message(error);
		return SR_ERR;
	}

	return SR_OK;
}

static int sr_ser_libsp_close(struct sr_serial_dev_inst *serial)
{
	int ret;
	char *error;

	if (!serial->sp_data) {
		sr_dbg("Cannot close unopened serial port %s.", serial->port);
		return SR_ERR;
	}

	ret = sp_close(serial->sp_data);

	switch (ret) {
	case SP_ERR_ARG:
		sr_err("Attempt to close an invalid serial port.");
		return SR_ERR_ARG;
	case SP_ERR_FAIL:
		error = sp_last_error_message();
		sr_err("Error closing port (%d): %s.",
			sp_last_error_code(), error);
		sp_free_error_message(error);
		return SR_ERR;
	}

	sp_free_port(serial->sp_data);
	serial->sp_data = NULL;

	return SR_OK;
}

static int sr_ser_libsp_flush(struct sr_serial_dev_inst *serial)
{
	int ret;
	char *error;

	if (!serial->sp_data) {
		sr_dbg("Cannot flush unopened serial port %s.", serial->port);
		return SR_ERR;
	}

	ret = sp_flush(serial->sp_data, SP_BUF_BOTH);

	switch (ret) {
	case SP_ERR_ARG:
		sr_err("Attempt to flush an invalid serial port.");
		return SR_ERR_ARG;
	case SP_ERR_FAIL:
		error = sp_last_error_message();
		sr_err("Error flushing port (%d): %s.",
			sp_last_error_code(), error);
		sp_free_error_message(error);
		return SR_ERR;
	}

	return SR_OK;
}

static int sr_ser_libsp_drain(struct sr_serial_dev_inst *serial)
{
	int ret;
	char *error;

	if (!serial->sp_data) {
		sr_dbg("Cannot drain unopened serial port %s.", serial->port);
		return SR_ERR;
	}

	ret = sp_drain(serial->sp_data);

	if (ret == SP_ERR_FAIL) {
		error = sp_last_error_message();
		sr_err("Error draining port (%d): %s.",
			sp_last_error_code(), error);
		sp_free_error_message(error);
		return SR_ERR;
	}

	return SR_OK;
}

static int sr_ser_libsp_write(struct sr_serial_dev_inst *serial,
	const void *buf, size_t count,
	int nonblocking, unsigned int timeout_ms)
{
	ssize_t ret;
	char *error;

	if (!serial->sp_data) {
		sr_dbg("Cannot use unopened serial port %s.", serial->port);
		return SR_ERR;
	}

	if (nonblocking)
		ret = sp_nonblocking_write(serial->sp_data, buf, count);
	else
		ret = sp_blocking_write(serial->sp_data, buf, count, timeout_ms);

	switch (ret) {
	case SP_ERR_ARG:
		sr_err("Attempted serial port write with invalid arguments.");
		return SR_ERR_ARG;
	case SP_ERR_FAIL:
		error = sp_last_error_message();
		sr_err("Write error (%d): %s.", sp_last_error_code(), error);
		sp_free_error_message(error);
		return SR_ERR;
	}

	return ret;
}

static int sr_ser_libsp_read(struct sr_serial_dev_inst *serial,
	void *buf, size_t count,
	int nonblocking, unsigned int timeout_ms)
{
	ssize_t ret;
	char *error;

	if (!serial->sp_data) {
		sr_dbg("Cannot use unopened serial port %s.", serial->port);
		return SR_ERR;
	}

	if (nonblocking)
		ret = sp_nonblocking_read(serial->sp_data, buf, count);
	else
		ret = sp_blocking_read(serial->sp_data, buf, count, timeout_ms);

	switch (ret) {
	case SP_ERR_ARG:
		sr_err("Attempted serial port read with invalid arguments.");
		return SR_ERR_ARG;
	case SP_ERR_FAIL:
		error = sp_last_error_message();
		sr_err("Read error (%d): %s.", sp_last_error_code(), error);
		sp_free_error_message(error);
		return SR_ERR;
	}

	return ret;
}

static int sr_ser_libsp_set_params(struct sr_serial_dev_inst *serial,
	int baudrate, int bits, int parity, int stopbits,
	int flowcontrol, int rts, int dtr)
{
	int ret;
	char *error;
	struct sp_port_config *config;
	int cts, xonoff;

	if (!serial->sp_data) {
		sr_dbg("Cannot configure unopened serial port %s.", serial->port);
		return SR_ERR;
	}

	sp_new_config(&config);
	sp_set_config_baudrate(config, baudrate);
	sp_set_config_bits(config, bits);
	switch (parity) {
	case 0:
		sp_set_config_parity(config, SP_PARITY_NONE);
		break;
	case 1:
		sp_set_config_parity(config, SP_PARITY_EVEN);
		break;
	case 2:
		sp_set_config_parity(config, SP_PARITY_ODD);
		break;
	default:
		return SR_ERR_ARG;
	}
	sp_set_config_stopbits(config, stopbits);
	rts = flowcontrol == 1 ? SP_RTS_FLOW_CONTROL : rts;
	sp_set_config_rts(config, rts);
	cts = flowcontrol == 1 ? SP_CTS_FLOW_CONTROL : SP_CTS_IGNORE;
	sp_set_config_cts(config, cts);
	sp_set_config_dtr(config, dtr);
	sp_set_config_dsr(config, SP_DSR_IGNORE);
	xonoff = flowcontrol == 2 ? SP_XONXOFF_INOUT : SP_XONXOFF_DISABLED;
	sp_set_config_xon_xoff(config, xonoff);

	ret = sp_set_config(serial->sp_data, config);
	sp_free_config(config);

	switch (ret) {
	case SP_ERR_ARG:
		sr_err("Invalid arguments for setting serial port parameters.");
		return SR_ERR_ARG;
	case SP_ERR_FAIL:
		error = sp_last_error_message();
		sr_err("Error setting serial port parameters (%d): %s.",
			sp_last_error_code(), error);
		sp_free_error_message(error);
		return SR_ERR;
	}

	return SR_OK;
}

#ifdef G_OS_WIN32
typedef HANDLE event_handle;
#else
typedef int event_handle;
#endif

static int sr_ser_libsp_source_add_int(struct sr_serial_dev_inst *serial,
	int events,
	void **keyptr, gintptr *fdptr, unsigned int *pollevtptr)
{
	struct sp_event_set *event_set;
	gintptr poll_fd;
	unsigned int poll_events;
	enum sp_event mask;

	if ((events & (G_IO_IN | G_IO_ERR)) && (events & G_IO_OUT)) {
		sr_err("Cannot poll input/error and output simultaneously.");
		return SR_ERR_ARG;
	}
	if (!serial->sp_data) {
		sr_err("Invalid serial port.");
		return SR_ERR_ARG;
	}

	if (sp_new_event_set(&event_set) != SP_OK)
		return SR_ERR;

	mask = 0;
	if (events & G_IO_IN)
		mask |= SP_EVENT_RX_READY;
	if (events & G_IO_OUT)
		mask |= SP_EVENT_TX_READY;
	if (events & G_IO_ERR)
		mask |= SP_EVENT_ERROR;

	if (sp_add_port_events(event_set, serial->sp_data, mask) != SP_OK) {
		sp_free_event_set(event_set);
		return SR_ERR;
	}
	if (event_set->count != 1) {
		sr_err("Unexpected number (%u) of event handles to poll.",
			event_set->count);
		sp_free_event_set(event_set);
		return SR_ERR;
	}

	poll_fd = (gintptr) ((event_handle *)event_set->handles)[0];
	mask = event_set->masks[0];

	sp_free_event_set(event_set);

	poll_events = 0;
	if (mask & SP_EVENT_RX_READY)
		poll_events |= G_IO_IN;
	if (mask & SP_EVENT_TX_READY)
		poll_events |= G_IO_OUT;
	if (mask & SP_EVENT_ERROR)
		poll_events |= G_IO_ERR;

	/*
	 * Using serial->sp_data as the key for the event source is not quite
	 * proper, as it makes it impossible to create another event source
	 * for the same serial port. However, these fixed keys will soon be
	 * removed from the API anyway, so this is OK for now.
	 */
	*keyptr = serial->sp_data;
	*fdptr = poll_fd;
	*pollevtptr = poll_events;

	return SR_OK;
}

static int sr_ser_libsp_source_add(struct sr_session *session,
	struct sr_serial_dev_inst *serial, int events, int timeout,
	sr_receive_data_callback cb, void *cb_data)
{
	int ret;
	void *key;
	gintptr poll_fd;
	unsigned int poll_events;

	ret = sr_ser_libsp_source_add_int(serial, events,
		&key, &poll_fd, &poll_events);
	if (ret != SR_OK)
		return ret;

	return sr_session_fd_source_add(session,
		key, poll_fd, poll_events,
		timeout, cb, cb_data);
}

static int sr_ser_libsp_source_remove(struct sr_session *session,
	struct sr_serial_dev_inst *serial)
{
	void *key;

	key = serial->sp_data;
	return sr_session_source_remove_internal(session, key);
}

static GSList *sr_ser_libsp_list(GSList *list, sr_ser_list_append_t append)
{
	struct sp_port **ports;
	size_t i;
	const char *name;
	const char *desc;

	if (sp_list_ports(&ports) != SP_OK)
		return list;

	for (i = 0; ports[i]; i++) {
		name = sp_get_port_name(ports[i]);
		desc = sp_get_port_description(ports[i]);
		list = append(list, name, desc);
	}

	sp_free_port_list(ports);

	return list;
}

static GSList *sr_ser_libsp_find_usb(GSList *list, sr_ser_find_append_t append,
	uint16_t vendor_id, uint16_t product_id)
{
	struct sp_port **ports;
	int i, vid, pid;

	if (sp_list_ports(&ports) != SP_OK)
		return list;

	for (i = 0; ports[i]; i++) {
		if (sp_get_port_transport(ports[i]) != SP_TRANSPORT_USB)
			continue;
		if (sp_get_port_usb_vid_pid(ports[i], &vid, &pid) != SP_OK)
			continue;
		if (vendor_id && vid != vendor_id)
			continue;
		if (product_id && pid != product_id)
			continue;
		list = append(list, sp_get_port_name(ports[i]));
	}

	sp_free_port_list(ports);

	return list;
}

static int sr_ser_libsp_get_frame_format(struct sr_serial_dev_inst *serial,
	int *baud, int *bits)
{
	struct sp_port_config *config;
	int ret, tmp;
	enum sp_parity parity;

	if (sp_new_config(&config) < 0)
		return SR_ERR_MALLOC;
	*baud = *bits = 0;
	ret = SR_OK;
	do {
		if (sp_get_config(serial->sp_data, config) < 0) {
			ret = SR_ERR_NA;
			break;
		}

		if (sp_get_config_baudrate(config, &tmp) < 0) {
			ret = SR_ERR_NA;
			break;
		}
		*baud = tmp;

		*bits += 1;	/* Start bit. */
		if (sp_get_config_bits(config, &tmp) < 0) {
			ret = SR_ERR_NA;
			break;
		}
		*bits += tmp;
		if (sp_get_config_parity(config, &parity) < 0) {
			ret = SR_ERR_NA;
			break;
		}
		*bits += (parity != SP_PARITY_NONE) ? 1 : 0;
		if (sp_get_config_stopbits(config, &tmp) < 0) {
			ret = SR_ERR_NA;
			break;
		}
		*bits += tmp;
	} while (FALSE);
	sp_free_config(config);

	return ret;
}

static size_t sr_ser_libsp_get_rx_avail(struct sr_serial_dev_inst *serial)
{
	int rc;

	if (!serial)
		return 0;

	rc = sp_input_waiting(serial->sp_data);
	if (rc < 0)
		return 0;

	return rc;
}

static struct ser_lib_functions serlib_sp = {
	.open = sr_ser_libsp_open,
	.close = sr_ser_libsp_close,
	.flush = sr_ser_libsp_flush,
	.drain = sr_ser_libsp_drain,
	.write = sr_ser_libsp_write,
	.read = sr_ser_libsp_read,
	.set_params = sr_ser_libsp_set_params,
	.setup_source_add = sr_ser_libsp_source_add,
	.setup_source_remove = sr_ser_libsp_source_remove,
	.list = sr_ser_libsp_list,
	.find_usb = sr_ser_libsp_find_usb,
	.get_frame_format = sr_ser_libsp_get_frame_format,
	.get_rx_avail = sr_ser_libsp_get_rx_avail,
};
SR_PRIV struct ser_lib_functions *ser_lib_funcs_libsp = &serlib_sp;

#else

SR_PRIV struct ser_lib_functions *ser_lib_funcs_libsp = NULL;

#endif
Commit	Line	Data
ae4c1fb6 GS	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com>
	5	* Copyright (C) 2010-2012 Uwe Hermann <uwe@hermann-uwe.de>
	6	* Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.com>
	7	* Copyright (C) 2014 Uffe Jakobsen <uffe@uffe.org>
	8	*
	9	* This program is free software: you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License as published by
	11	* the Free Software Foundation, either version 3 of the License, or
	12	* (at your option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	* GNU General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	21	*/
	22
	23	#include <config.h>
	24	#include <glib.h>
	25	#include <libsigrok/libsigrok.h>
	26	#include "libsigrok-internal.h"
	27	#ifdef HAVE_LIBSERIALPORT
	28	#include <libserialport.h>
	29	#endif
	30	#ifdef G_OS_WIN32
	31	#include <windows.h> /* for HANDLE */
	32	#endif
	33
ae4c1fb6	34	#define LOG_PREFIX "serial-libsp"
ae4c1fb6 GS	35
	36	/**
	37	* @file
	38	*
	39	* Serial port handling, wraps the external libserialport dependency.
	40	*/
	41
a7b8692e GS	42	#ifdef HAVE_LIBSERIALPORT
a7b8692e GS	43
ae4c1fb6 GS	44	/**
	45	* @defgroup grp_serial_libsp Serial port handling, libserialport group
	46	*
	47	* Serial port handling functions, based on libserialport.
	48	*
	49	* @{
	50	*/
	51
a7b8692e	52	static int sr_ser_libsp_open(struct sr_serial_dev_inst *serial, int flags)
ae4c1fb6 GS	53	{
	54	int ret;
	55	char *error;
	56	int sp_flags;
	57
	58	sp_get_port_by_name(serial->port, &serial->sp_data);
	59
	60	sp_flags = 0;
	61	if (flags & SERIAL_RDWR)
	62	sp_flags = (SP_MODE_READ \| SP_MODE_WRITE);
	63	else if (flags & SERIAL_RDONLY)
	64	sp_flags = SP_MODE_READ;
	65
	66	ret = sp_open(serial->sp_data, sp_flags);
	67
	68	switch (ret) {
	69	case SP_ERR_ARG:
	70	sr_err("Attempt to open serial port with invalid parameters.");
	71	return SR_ERR_ARG;
	72	case SP_ERR_FAIL:
	73	error = sp_last_error_message();
	74	sr_err("Error opening port (%d): %s.",
	75	sp_last_error_code(), error);
	76	sp_free_error_message(error);
	77	return SR_ERR;
	78	}
	79
	80	return SR_OK;
	81	}
	82
a7b8692e	83	static int sr_ser_libsp_close(struct sr_serial_dev_inst *serial)
ae4c1fb6 GS	84	{
	85	int ret;
	86	char *error;
	87
	88	if (!serial->sp_data) {
	89	sr_dbg("Cannot close unopened serial port %s.", serial->port);
	90	return SR_ERR;
	91	}
	92
	93	ret = sp_close(serial->sp_data);
	94
	95	switch (ret) {
	96	case SP_ERR_ARG:
	97	sr_err("Attempt to close an invalid serial port.");
	98	return SR_ERR_ARG;
	99	case SP_ERR_FAIL:
	100	error = sp_last_error_message();
	101	sr_err("Error closing port (%d): %s.",
	102	sp_last_error_code(), error);
	103	sp_free_error_message(error);
	104	return SR_ERR;
	105	}
	106
	107	sp_free_port(serial->sp_data);
	108	serial->sp_data = NULL;
	109
	110	return SR_OK;
	111	}
	112
a7b8692e	113	static int sr_ser_libsp_flush(struct sr_serial_dev_inst *serial)
ae4c1fb6 GS	114	{
	115	int ret;
	116	char *error;
	117
	118	if (!serial->sp_data) {
	119	sr_dbg("Cannot flush unopened serial port %s.", serial->port);
	120	return SR_ERR;
	121	}
	122
	123	ret = sp_flush(serial->sp_data, SP_BUF_BOTH);
	124
	125	switch (ret) {
	126	case SP_ERR_ARG:
	127	sr_err("Attempt to flush an invalid serial port.");
	128	return SR_ERR_ARG;
	129	case SP_ERR_FAIL:
	130	error = sp_last_error_message();
	131	sr_err("Error flushing port (%d): %s.",
	132	sp_last_error_code(), error);
	133	sp_free_error_message(error);
	134	return SR_ERR;
	135	}
	136
	137	return SR_OK;
	138	}
	139
a7b8692e	140	static int sr_ser_libsp_drain(struct sr_serial_dev_inst *serial)
ae4c1fb6 GS	141	{
	142	int ret;
	143	char *error;
	144
	145	if (!serial->sp_data) {
	146	sr_dbg("Cannot drain unopened serial port %s.", serial->port);
	147	return SR_ERR;
	148	}
	149
	150	ret = sp_drain(serial->sp_data);
	151
	152	if (ret == SP_ERR_FAIL) {
	153	error = sp_last_error_message();
	154	sr_err("Error draining port (%d): %s.",
	155	sp_last_error_code(), error);
	156	sp_free_error_message(error);
	157	return SR_ERR;
	158	}
	159
	160	return SR_OK;
	161	}
	162
a7b8692e	163	static int sr_ser_libsp_write(struct sr_serial_dev_inst *serial,
ae4c1fb6 GS	164	const void *buf, size_t count,
	165	int nonblocking, unsigned int timeout_ms)
	166	{
	167	ssize_t ret;
	168	char *error;
	169
	170	if (!serial->sp_data) {
	171	sr_dbg("Cannot use unopened serial port %s.", serial->port);
	172	return SR_ERR;
	173	}
	174
	175	if (nonblocking)
	176	ret = sp_nonblocking_write(serial->sp_data, buf, count);
	177	else
	178	ret = sp_blocking_write(serial->sp_data, buf, count, timeout_ms);
	179
	180	switch (ret) {
	181	case SP_ERR_ARG:
	182	sr_err("Attempted serial port write with invalid arguments.");
	183	return SR_ERR_ARG;
	184	case SP_ERR_FAIL:
	185	error = sp_last_error_message();
	186	sr_err("Write error (%d): %s.", sp_last_error_code(), error);
	187	sp_free_error_message(error);
	188	return SR_ERR;
	189	}
	190
	191	return ret;
	192	}
	193
a7b8692e	194	static int sr_ser_libsp_read(struct sr_serial_dev_inst *serial,
ae4c1fb6 GS	195	void *buf, size_t count,
	196	int nonblocking, unsigned int timeout_ms)
	197	{
	198	ssize_t ret;
	199	char *error;
	200
	201	if (!serial->sp_data) {
	202	sr_dbg("Cannot use unopened serial port %s.", serial->port);
	203	return SR_ERR;
	204	}
	205
	206	if (nonblocking)
	207	ret = sp_nonblocking_read(serial->sp_data, buf, count);
	208	else
	209	ret = sp_blocking_read(serial->sp_data, buf, count, timeout_ms);
	210
	211	switch (ret) {
	212	case SP_ERR_ARG:
	213	sr_err("Attempted serial port read with invalid arguments.");
	214	return SR_ERR_ARG;
	215	case SP_ERR_FAIL:
	216	error = sp_last_error_message();
	217	sr_err("Read error (%d): %s.", sp_last_error_code(), error);
	218	sp_free_error_message(error);
	219	return SR_ERR;
	220	}
	221
	222	return ret;
	223	}
	224
a7b8692e	225	static int sr_ser_libsp_set_params(struct sr_serial_dev_inst *serial,
ae4c1fb6 GS	226	int baudrate, int bits, int parity, int stopbits,
	227	int flowcontrol, int rts, int dtr)
	228	{
	229	int ret;
	230	char *error;
	231	struct sp_port_config *config;
	232	int cts, xonoff;
	233
	234	if (!serial->sp_data) {
	235	sr_dbg("Cannot configure unopened serial port %s.", serial->port);
	236	return SR_ERR;
	237	}
	238
	239	sp_new_config(&config);
	240	sp_set_config_baudrate(config, baudrate);
	241	sp_set_config_bits(config, bits);
	242	switch (parity) {
	243	case 0:
	244	sp_set_config_parity(config, SP_PARITY_NONE);
	245	break;
	246	case 1:
	247	sp_set_config_parity(config, SP_PARITY_EVEN);
	248	break;
	249	case 2:
	250	sp_set_config_parity(config, SP_PARITY_ODD);
	251	break;
	252	default:
	253	return SR_ERR_ARG;
	254	}
	255	sp_set_config_stopbits(config, stopbits);
	256	rts = flowcontrol == 1 ? SP_RTS_FLOW_CONTROL : rts;
	257	sp_set_config_rts(config, rts);
	258	cts = flowcontrol == 1 ? SP_CTS_FLOW_CONTROL : SP_CTS_IGNORE;
	259	sp_set_config_cts(config, cts);
	260	sp_set_config_dtr(config, dtr);
	261	sp_set_config_dsr(config, SP_DSR_IGNORE);
	262	xonoff = flowcontrol == 2 ? SP_XONXOFF_INOUT : SP_XONXOFF_DISABLED;
	263	sp_set_config_xon_xoff(config, xonoff);
	264
	265	ret = sp_set_config(serial->sp_data, config);
	266	sp_free_config(config);
	267
	268	switch (ret) {
	269	case SP_ERR_ARG:
	270	sr_err("Invalid arguments for setting serial port parameters.");
	271	return SR_ERR_ARG;
	272	case SP_ERR_FAIL:
	273	error = sp_last_error_message();
	274	sr_err("Error setting serial port parameters (%d): %s.",
	275	sp_last_error_code(), error);
	276	sp_free_error_message(error);
	277	return SR_ERR;
	278	}
	279
	280	return SR_OK;
	281	}
	282
ae4c1fb6 GS	283	#ifdef G_OS_WIN32
	284	typedef HANDLE event_handle;
	285	#else
	286	typedef int event_handle;
	287	#endif
ae4c1fb6 GS	288
	289	static int sr_ser_libsp_source_add_int(struct sr_serial_dev_inst *serial,
	290	int events,
	291	void *keyptr, gintptr fdptr, unsigned int *pollevtptr)
	292	{
	293	struct sp_event_set *event_set;
	294	gintptr poll_fd;
	295	unsigned int poll_events;
	296	enum sp_event mask;
	297
	298	if ((events & (G_IO_IN \| G_IO_ERR)) && (events & G_IO_OUT)) {
	299	sr_err("Cannot poll input/error and output simultaneously.");
	300	return SR_ERR_ARG;
	301	}
	302	if (!serial->sp_data) {
	303	sr_err("Invalid serial port.");
	304	return SR_ERR_ARG;
	305	}
	306
	307	if (sp_new_event_set(&event_set) != SP_OK)
	308	return SR_ERR;
	309
	310	mask = 0;
	311	if (events & G_IO_IN)
	312	mask \|= SP_EVENT_RX_READY;
	313	if (events & G_IO_OUT)
	314	mask \|= SP_EVENT_TX_READY;
	315	if (events & G_IO_ERR)
	316	mask \|= SP_EVENT_ERROR;
	317
	318	if (sp_add_port_events(event_set, serial->sp_data, mask) != SP_OK) {
	319	sp_free_event_set(event_set);
	320	return SR_ERR;
	321	}
	322	if (event_set->count != 1) {
	323	sr_err("Unexpected number (%u) of event handles to poll.",
	324	event_set->count);
	325	sp_free_event_set(event_set);
	326	return SR_ERR;
	327	}
	328
	329	poll_fd = (gintptr) ((event_handle *)event_set->handles)[0];
	330	mask = event_set->masks[0];
	331
	332	sp_free_event_set(event_set);
	333
	334	poll_events = 0;
	335	if (mask & SP_EVENT_RX_READY)
	336	poll_events \|= G_IO_IN;
	337	if (mask & SP_EVENT_TX_READY)
	338	poll_events \|= G_IO_OUT;
	339	if (mask & SP_EVENT_ERROR)
	340	poll_events \|= G_IO_ERR;
	341
	342	/*
	343	* Using serial->sp_data as the key for the event source is not quite
	344	* proper, as it makes it impossible to create another event source
	345	* for the same serial port. However, these fixed keys will soon be
	346	* removed from the API anyway, so this is OK for now.
	347	*/
	348	*keyptr = serial->sp_data;
	349	*fdptr = poll_fd;
	350	*pollevtptr = poll_events;
	351
352	return SR_OK;
353	}
354
a7b8692e	355	static int sr_ser_libsp_source_add(struct sr_session *session,
ae4c1fb6 GS	356	struct sr_serial_dev_inst *serial, int events, int timeout,
	357	sr_receive_data_callback cb, void *cb_data)
	358	{
	359	int ret;
	360	void *key;
	361	gintptr poll_fd;
	362	unsigned int poll_events;
	363
	364	ret = sr_ser_libsp_source_add_int(serial, events,
	365	&key, &poll_fd, &poll_events);
	366	if (ret != SR_OK)
	367	return ret;
	368
	369	return sr_session_fd_source_add(session,
	370	key, poll_fd, poll_events,
	371	timeout, cb, cb_data);
	372	}
	373
a7b8692e	374	static int sr_ser_libsp_source_remove(struct sr_session *session,
ae4c1fb6 GS	375	struct sr_serial_dev_inst *serial)
	376	{
	377	void *key;
	378
	379	key = serial->sp_data;
	380	return sr_session_source_remove_internal(session, key);
	381	}
	382
a7b8692e	383	static GSList sr_ser_libsp_list(GSList list, sr_ser_list_append_t append)
ae4c1fb6 GS	384	{
	385	struct sp_port **ports;
	386	size_t i;
	387	const char *name;
	388	const char *desc;
	389
	390	if (sp_list_ports(&ports) != SP_OK)
	391	return list;
	392
	393	for (i = 0; ports[i]; i++) {
	394	name = sp_get_port_name(ports[i]);
	395	desc = sp_get_port_description(ports[i]);
	396	list = append(list, name, desc);
	397	}
	398
	399	sp_free_port_list(ports);
	400
	401	return list;
	402	}
	403
a7b8692e	404	static GSList sr_ser_libsp_find_usb(GSList list, sr_ser_find_append_t append,
ae4c1fb6 GS	405	uint16_t vendor_id, uint16_t product_id)
	406	{
	407	struct sp_port **ports;
	408	int i, vid, pid;
	409
	410	if (sp_list_ports(&ports) != SP_OK)
	411	return list;
	412
	413	for (i = 0; ports[i]; i++) {
	414	if (sp_get_port_transport(ports[i]) != SP_TRANSPORT_USB)
	415	continue;
	416	if (sp_get_port_usb_vid_pid(ports[i], &vid, &pid) != SP_OK)
	417	continue;
	418	if (vendor_id && vid != vendor_id)
	419	continue;
	420	if (product_id && pid != product_id)
	421	continue;
	422	list = append(list, sp_get_port_name(ports[i]));
	423	}
	424
	425	sp_free_port_list(ports);
	426
	427	return list;
	428	}
	429
a7b8692e	430	static int sr_ser_libsp_get_frame_format(struct sr_serial_dev_inst *serial,
ae4c1fb6 GS	431	int baud, int bits)
	432	{
	433	struct sp_port_config *config;
	434	int ret, tmp;
	435	enum sp_parity parity;
	436
	437	if (sp_new_config(&config) < 0)
	438	return SR_ERR_MALLOC;
	439	baud = bits = 0;
	440	ret = SR_OK;
	441	do {
	442	if (sp_get_config(serial->sp_data, config) < 0) {
	443	ret = SR_ERR_NA;
	444	break;
	445	}
	446
	447	if (sp_get_config_baudrate(config, &tmp) < 0) {
	448	ret = SR_ERR_NA;
	449	break;
	450	}
	451	*baud = tmp;
	452
	453	bits += 1; / Start bit. */
	454	if (sp_get_config_bits(config, &tmp) < 0) {
	455	ret = SR_ERR_NA;
	456	break;
	457	}
	458	*bits += tmp;
	459	if (sp_get_config_parity(config, &parity) < 0) {
	460	ret = SR_ERR_NA;
	461	break;
	462	}
	463	*bits += (parity != SP_PARITY_NONE) ? 1 : 0;
	464	if (sp_get_config_stopbits(config, &tmp) < 0) {
	465	ret = SR_ERR_NA;
	466	break;
	467	}
	468	*bits += tmp;
	469	} while (FALSE);
	470	sp_free_config(config);
	471
	472	return ret;
	473	}
8c3df6e5	474
a7b8692e	475	static size_t sr_ser_libsp_get_rx_avail(struct sr_serial_dev_inst *serial)
8c3df6e5 GS	476	{
	477	int rc;
	478
	479	if (!serial)
	480	return 0;
	481
	482	rc = sp_input_waiting(serial->sp_data);
	483	if (rc < 0)
	484	return 0;
	485
	486	return rc;
	487	}
a7b8692e GS	488
	489	static struct ser_lib_functions serlib_sp = {
	490	.open = sr_ser_libsp_open,
	491	.close = sr_ser_libsp_close,
	492	.flush = sr_ser_libsp_flush,
	493	.drain = sr_ser_libsp_drain,
	494	.write = sr_ser_libsp_write,
	495	.read = sr_ser_libsp_read,
	496	.set_params = sr_ser_libsp_set_params,
	497	.setup_source_add = sr_ser_libsp_source_add,
	498	.setup_source_remove = sr_ser_libsp_source_remove,
	499	.list = sr_ser_libsp_list,
	500	.find_usb = sr_ser_libsp_find_usb,
	501	.get_frame_format = sr_ser_libsp_get_frame_format,
	502	.get_rx_avail = sr_ser_libsp_get_rx_avail,
	503	};
	504	SR_PRIV struct ser_lib_functions *ser_lib_funcs_libsp = &serlib_sp;
	505
	506	#else
	507
	508	SR_PRIV struct ser_lib_functions *ser_lib_funcs_libsp = NULL;
	509
	510	#endif