/*
- * This file is part of the sigrok project.
+ * 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>
#include "libsigrok.h"
#include "libsigrok-internal.h"
-/* SR_HWCAP_CONN takes one of these: */
-#define CONN_USB_VIDPID "^([0-9a-z]{1,4})\\.([0-9a-z]{1,4})$"
+/* SR_CONF_CONN takes one of these: */
+#define CONN_USB_VIDPID "^([0-9a-z]{4})\\.([0-9a-z]{4})$"
#define CONN_USB_BUSADDR "^(\\d+)\\.(\\d+)$"
-/* Message logging helpers with driver-specific prefix string. */
-#define DRIVER_LOG_DOMAIN "usb: "
-#define sr_log(l, s, args...) sr_log(l, DRIVER_LOG_DOMAIN s, ## args)
-#define sr_spew(s, args...) sr_spew(DRIVER_LOG_DOMAIN s, ## args)
-#define sr_dbg(s, args...) sr_dbg(DRIVER_LOG_DOMAIN s, ## args)
-#define sr_info(s, args...) sr_info(DRIVER_LOG_DOMAIN s, ## args)
-#define sr_warn(s, args...) sr_warn(DRIVER_LOG_DOMAIN s, ## args)
-#define sr_err(s, args...) sr_err(DRIVER_LOG_DOMAIN s, ## args)
+/* Some USBTMC-specific enums, as defined in the USBTMC standard. */
+#define SUBCLASS_USBTMC 0x03
+#define USBTMC_USB488 0x01
+
+/* Message logging helpers with subsystem-specific prefix string. */
+#define LOG_PREFIX "usb: "
+#define sr_log(l, s, args...) sr_log(l, LOG_PREFIX s, ## args)
+#define sr_spew(s, args...) sr_spew(LOG_PREFIX s, ## args)
+#define sr_dbg(s, args...) sr_dbg(LOG_PREFIX s, ## args)
+#define sr_info(s, args...) sr_info(LOG_PREFIX s, ## args)
+#define sr_warn(s, args...) sr_warn(LOG_PREFIX s, ## args)
+#define sr_err(s, args...) sr_err(LOG_PREFIX s, ## args)
/**
* Find USB devices according to a connection string.
vid = pid = bus = addr = 0;
reg = g_regex_new(CONN_USB_VIDPID, 0, 0, NULL);
if (g_regex_match(reg, conn, 0, &match)) {
- /* Extract VID. */
- if ((mstr = g_match_info_fetch(match, 1))) {
+ if ((mstr = g_match_info_fetch(match, 1)))
vid = strtoul(mstr, NULL, 16);
- sr_spew("Extracted VID 0x%04x.", vid);
- }
g_free(mstr);
- /* Extract PID. */
- if ((mstr = g_match_info_fetch(match, 2))) {
+ if ((mstr = g_match_info_fetch(match, 2)))
pid = strtoul(mstr, NULL, 16);
- sr_spew("Extracted PID 0x%04x.", pid);
- }
g_free(mstr);
sr_dbg("Trying to find USB device with VID:PID = %04x:%04x.",
vid, pid);
g_regex_unref(reg);
reg = g_regex_new(CONN_USB_BUSADDR, 0, 0, NULL);
if (g_regex_match(reg, conn, 0, &match)) {
- /* Extract bus. */
- if ((mstr = g_match_info_fetch(match, 1))) {
- bus = strtoul(mstr, NULL, 16);
- sr_spew("Extracted bus %d.", bus);
- }
+ if ((mstr = g_match_info_fetch(match, 1)))
+ bus = strtoul(mstr, NULL, 10);
g_free(mstr);
- /* Extract address. */
- if ((mstr = g_match_info_fetch(match, 2))) {
- addr = strtoul(mstr, NULL, 16);
- sr_spew("Extracted address %d.", addr);
- }
+ 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_regex_unref(reg);
if (vid + pid + bus + addr == 0) {
- sr_err("Neither VID:PID nor bus.address was found.");
+ sr_err("Neither VID:PID nor bus.address was specified.");
return 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: %d.", ret);
+ sr_err("Failed to get device descriptor: %s.",
+ libusb_error_name(ret));
continue;
}
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.");
+ 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.",
b = libusb_get_bus_number(devlist[i]);
a = libusb_get_device_address(devlist[i]);
-
- if (b != usb->bus || a != usb->address) {
- sr_spew("bus.address = %d.%d does not match.", b, a);
+ if (b != usb->bus || a != usb->address)
continue;
- }
if ((r = libusb_open(devlist[i], &usb->devhdl)) < 0) {
sr_err("Failed to open device: %s.",
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