+++ /dev/null
-/*
- * This file is part of the libsigrok project.
- *
- * Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de>
- * Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
- *
- * 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 2 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, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include <stdlib.h>
-#include <glib.h>
-#include <libusb.h>
-#include "libsigrok.h"
-#include "libsigrok-internal.h"
-
-/* SR_CONF_CONN takes one of these: */
-#define CONN_USB_VIDPID "^([0-9a-z]{4})\\.([0-9a-z]{4})$"
-#define CONN_USB_BUSADDR "^(\\d+)\\.(\\d+)$"
-
-/* Some USBTMC-specific enums, as defined in the USBTMC standard. */
-#define SUBCLASS_USBTMC 0x03
-#define USBTMC_USB488 0x01
-
-#define LOG_PREFIX "usb"
-
-/**
- * Find USB devices according to a connection string.
- *
- * @param usb_ctx libusb context to use while scanning.
- * @param conn Connection string specifying the device(s) to match. This
- * can be of the form "<bus>.<address>", or "<vendorid>.<productid>".
- *
- * @return A GSList of struct sr_usb_dev_inst, with bus and address fields
- * matching the device that matched the connection string. The GSList and
- * its contents must be freed by the caller.
- */
-SR_PRIV GSList *sr_usb_find(libusb_context *usb_ctx, const char *conn)
-{
- struct sr_usb_dev_inst *usb;
- struct libusb_device **devlist;
- struct libusb_device_descriptor des;
- GSList *devices;
- GRegex *reg;
- GMatchInfo *match;
- int vid, pid, bus, addr, b, a, ret, i;
- char *mstr;
-
- vid = pid = bus = addr = 0;
- reg = g_regex_new(CONN_USB_VIDPID, 0, 0, NULL);
- if (g_regex_match(reg, conn, 0, &match)) {
- if ((mstr = g_match_info_fetch(match, 1)))
- vid = strtoul(mstr, NULL, 16);
- g_free(mstr);
-
- if ((mstr = g_match_info_fetch(match, 2)))
- pid = strtoul(mstr, NULL, 16);
- g_free(mstr);
- sr_dbg("Trying to find USB device with VID:PID = %04x:%04x.",
- vid, pid);
- } else {
- g_match_info_unref(match);
- g_regex_unref(reg);
- reg = g_regex_new(CONN_USB_BUSADDR, 0, 0, NULL);
- if (g_regex_match(reg, conn, 0, &match)) {
- if ((mstr = g_match_info_fetch(match, 1)))
- bus = strtoul(mstr, NULL, 10);
- g_free(mstr);
-
- if ((mstr = g_match_info_fetch(match, 2)))
- addr = strtoul(mstr, NULL, 10);
- g_free(mstr);
- sr_dbg("Trying to find USB device with bus.address = "
- "%d.%d.", bus, addr);
- }
- }
- g_match_info_unref(match);
- g_regex_unref(reg);
-
- if (vid + pid + bus + addr == 0) {
- sr_err("Neither VID:PID nor bus.address was specified.");
- return NULL;
- }
-
- if (bus > 64) {
- sr_err("Invalid bus specified: %d.", bus);
- return NULL;
- }
-
- if (addr > 127) {
- sr_err("Invalid address specified: %d.", addr);
- return NULL;
- }
-
- /* Looks like a valid USB device specification, but is it connected? */
- devices = NULL;
- libusb_get_device_list(usb_ctx, &devlist);
- for (i = 0; devlist[i]; i++) {
- if ((ret = libusb_get_device_descriptor(devlist[i], &des))) {
- sr_err("Failed to get device descriptor: %s.",
- libusb_error_name(ret));
- continue;
- }
-
- if (vid + pid && (des.idVendor != vid || des.idProduct != pid))
- continue;
-
- b = libusb_get_bus_number(devlist[i]);
- a = libusb_get_device_address(devlist[i]);
- if (bus + addr && (b != bus || a != addr))
- continue;
-
- sr_dbg("Found USB device (VID:PID = %04x:%04x, bus.address = "
- "%d.%d).", des.idVendor, des.idProduct, b, a);
-
- usb = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]),
- libusb_get_device_address(devlist[i]), NULL);
- devices = g_slist_append(devices, usb);
- }
- libusb_free_device_list(devlist, 1);
-
- sr_dbg("Found %d device(s).", g_slist_length(devices));
-
- return devices;
-}
-
-/**
- * Find USB devices supporting the USBTMC class
- *
- * @param usb_ctx libusb context to use while scanning.
- *
- * @return A GSList of struct sr_usb_dev_inst, with bus and address fields
- * indicating devices with USBTMC support.
- */
-SR_PRIV GSList *sr_usb_find_usbtmc(libusb_context *usb_ctx)
-{
- struct sr_usb_dev_inst *usb;
- struct libusb_device **devlist;
- struct libusb_device_descriptor des;
- struct libusb_config_descriptor *confdes;
- const struct libusb_interface_descriptor *intfdes;
- GSList *devices;
- int confidx, intfidx, ret, i;
-
- devices = NULL;
- libusb_get_device_list(usb_ctx, &devlist);
- for (i = 0; devlist[i]; i++) {
- if ((ret = libusb_get_device_descriptor(devlist[i], &des))) {
- sr_err("Failed to get device descriptor: %s.",
- libusb_error_name(ret));
- continue;
- }
-
- for (confidx = 0; confidx < des.bNumConfigurations; confidx++) {
- if (libusb_get_config_descriptor(devlist[i], confidx, &confdes) != 0) {
- sr_err("Failed to get configuration descriptor.");
- break;
- }
- for (intfidx = 0; intfidx < confdes->bNumInterfaces; intfidx++) {
- intfdes = confdes->interface[intfidx].altsetting;
- if (intfdes->bInterfaceClass != LIBUSB_CLASS_APPLICATION
- || intfdes->bInterfaceSubClass != SUBCLASS_USBTMC
- || intfdes->bInterfaceProtocol != USBTMC_USB488)
- continue;
- sr_dbg("Found USBTMC device (VID:PID = %04x:%04x, bus.address = "
- "%d.%d).", des.idVendor, des.idProduct,
- libusb_get_bus_number(devlist[i]),
- libusb_get_device_address(devlist[i]));
-
- usb = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]),
- libusb_get_device_address(devlist[i]), NULL);
- devices = g_slist_append(devices, usb);
- }
- libusb_free_config_descriptor(confdes);
- }
- }
- libusb_free_device_list(devlist, 1);
-
- sr_dbg("Found %d device(s).", g_slist_length(devices));
-
- return devices;
-}
-
-SR_PRIV int sr_usb_open(libusb_context *usb_ctx, struct sr_usb_dev_inst *usb)
-{
- struct libusb_device **devlist;
- struct libusb_device_descriptor des;
- int ret, r, cnt, i, a, b;
-
- sr_dbg("Trying to open USB device %d.%d.", usb->bus, usb->address);
-
- if ((cnt = libusb_get_device_list(usb_ctx, &devlist)) < 0) {
- sr_err("Failed to retrieve device list: %s.",
- libusb_error_name(cnt));
- return SR_ERR;
- }
-
- ret = SR_ERR;
- for (i = 0; i < cnt; i++) {
- if ((r = libusb_get_device_descriptor(devlist[i], &des)) < 0) {
- sr_err("Failed to get device descriptor: %s.",
- libusb_error_name(r));
- continue;
- }
-
- b = libusb_get_bus_number(devlist[i]);
- a = libusb_get_device_address(devlist[i]);
- if (b != usb->bus || a != usb->address)
- continue;
-
- if ((r = libusb_open(devlist[i], &usb->devhdl)) < 0) {
- sr_err("Failed to open device: %s.",
- libusb_error_name(r));
- break;
- }
-
- sr_dbg("Opened USB device (VID:PID = %04x:%04x, bus.address = "
- "%d.%d).", des.idVendor, des.idProduct, b, a);
-
- ret = SR_OK;
- break;
- }
-
- libusb_free_device_list(devlist, 1);
-
- return ret;
-}
-
-#ifdef _WIN32
-SR_PRIV gpointer usb_thread(gpointer data)
-{
- struct sr_context *ctx = data;
-
- while (ctx->usb_thread_running) {
- g_mutex_lock(&ctx->usb_mutex);
- libusb_wait_for_event(ctx->libusb_ctx, NULL);
- SetEvent(ctx->usb_event);
- g_mutex_unlock(&ctx->usb_mutex);
- g_thread_yield();
- }
-
- return NULL;
-}
-
-SR_PRIV int usb_callback(int fd, int revents, void *cb_data)
-{
- struct sr_context *ctx = cb_data;
- int ret;
-
- g_mutex_lock(&ctx->usb_mutex);
- ret = ctx->usb_cb(fd, revents, ctx->usb_cb_data);
-
- if (ctx->usb_thread_running) {
- ResetEvent(ctx->usb_event);
- g_mutex_unlock(&ctx->usb_mutex);
- }
-
- return ret;
-}
-#endif
-
-SR_PRIV int usb_source_add(struct sr_context *ctx, int timeout,
- sr_receive_data_callback_t cb, void *cb_data)
-{
- if (ctx->usb_source_present) {
- sr_err("A USB event source is already present.");
- return SR_ERR;
- }
-
-#ifdef _WIN32
- ctx->usb_event = CreateEvent(NULL, TRUE, FALSE, NULL);
- g_mutex_init(&ctx->usb_mutex);
- ctx->usb_thread_running = TRUE;
- ctx->usb_thread = g_thread_new("usb", usb_thread, ctx);
- ctx->usb_pollfd.fd = ctx->usb_event;
- ctx->usb_pollfd.events = G_IO_IN;
- ctx->usb_cb = cb;
- ctx->usb_cb_data = cb_data;
- sr_session_source_add_pollfd(&ctx->usb_pollfd, timeout, usb_callback, ctx);
-#else
- const struct libusb_pollfd **lupfd;
- unsigned int i;
-
- lupfd = libusb_get_pollfds(ctx->libusb_ctx);
- for (i = 0; lupfd[i]; i++)
- sr_source_add(lupfd[i]->fd, lupfd[i]->events, timeout, cb, cb_data);
- free(lupfd);
-#endif
- ctx->usb_source_present = TRUE;
-
- return SR_OK;
-}
-
-SR_PRIV int usb_source_remove(struct sr_context *ctx)
-{
- if (!ctx->usb_source_present)
- return SR_OK;
-
-#ifdef _WIN32
- ctx->usb_thread_running = FALSE;
- g_mutex_unlock(&ctx->usb_mutex);
- libusb_unlock_events(ctx->libusb_ctx);
- g_thread_join(ctx->usb_thread);
- g_mutex_clear(&ctx->usb_mutex);
- sr_session_source_remove_pollfd(&ctx->usb_pollfd);
- CloseHandle(ctx->usb_event);
-#else
- const struct libusb_pollfd **lupfd;
- unsigned int i;
-
- lupfd = libusb_get_pollfds(ctx->libusb_ctx);
- for (i = 0; lupfd[i]; i++)
- sr_source_remove(lupfd[i]->fd);
- free(lupfd);
-#endif
- ctx->usb_source_present = FALSE;
-
- return SR_OK;
-}
projects / libsigrok.git / blobdiff