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authorGravatar Nikias Bassen2014-11-11 14:47:22 +0100
committerGravatar Nikias Bassen2014-12-02 19:16:43 +0100
commitb752fbc1dd92238a34c888fbaef921aa802c4a82 (patch)
tree36734c11879da01995b037cf104cbca4ef0c4b79 /src
parentab51bbbe6d78678db1bdd04be1eeec6bb1d59c34 (diff)
downloadusbmuxd-b752fbc1dd92238a34c888fbaef921aa802c4a82.tar.gz
usbmuxd-b752fbc1dd92238a34c888fbaef921aa802c4a82.tar.bz2
usb: Implement device discovery using libusb hotplug events
Diffstat (limited to 'src')
-rw-r--r--src/usb.c470
1 files changed, 268 insertions, 202 deletions
diff --git a/src/usb.c b/src/usb.c
index f5e8092..3ce2abb 100644
--- a/src/usb.c
+++ b/src/usb.c
@@ -36,6 +36,10 @@
#include "device.h"
#include "utils.h"
+#if (defined(LIBUSB_API_VERSION) && (LIBUSB_API_VERSION >= 0x01000102)) || (defined(LIBUSBX_API_VERSION) && (LIBUSBX_API_VERSION >= 0x01000102))
+#define HAVE_LIBUSB_HOTPLUG_API 1
+#endif
+
// interval for device connection/disconnection polling, in milliseconds
// we need this because there is currently no asynchronous device discovery mechanism in libusb
#define DEVICE_POLL_TIME 1000
@@ -65,6 +69,7 @@ static struct timeval next_dev_poll_time;
static int devlist_failures;
static int device_polling;
+static int device_hotplug = 1;
static void usb_disconnect(struct usb_device *dev)
{
@@ -253,9 +258,217 @@ static int start_rx_loop(struct usb_device *dev)
return 0;
}
+static int usb_device_add(libusb_device* dev)
+{
+ int j, res;
+ // the following are non-blocking operations on the device list
+ uint8_t bus = libusb_get_bus_number(dev);
+ uint8_t address = libusb_get_device_address(dev);
+ struct libusb_device_descriptor devdesc;
+ int found = 0;
+ FOREACH(struct usb_device *usbdev, &device_list) {
+ if(usbdev->bus == bus && usbdev->address == address) {
+ usbdev->alive = 1;
+ found = 1;
+ break;
+ }
+ } ENDFOREACH
+ if(found)
+ return 0; //device already found
+
+ if((res = libusb_get_device_descriptor(dev, &devdesc)) != 0) {
+ usbmuxd_log(LL_WARNING, "Could not get device descriptor for device %d-%d: %d", bus, address, res);
+ return -1;
+ }
+ if(devdesc.idVendor != VID_APPLE)
+ return -1;
+ if((devdesc.idProduct < PID_RANGE_LOW) ||
+ (devdesc.idProduct > PID_RANGE_MAX))
+ return -1;
+ libusb_device_handle *handle;
+ usbmuxd_log(LL_INFO, "Found new device with v/p %04x:%04x at %d-%d", devdesc.idVendor, devdesc.idProduct, bus, address);
+ // potentially blocking operations follow; they will only run when new devices are detected, which is acceptable
+ if((res = libusb_open(dev, &handle)) != 0) {
+ usbmuxd_log(LL_WARNING, "Could not open device %d-%d: %d", bus, address, res);
+ return -1;
+ }
+
+ int current_config = 0;
+ if((res = libusb_get_configuration(handle, &current_config)) != 0) {
+ usbmuxd_log(LL_WARNING, "Could not get configuration for device %d-%d: %d", bus, address, res);
+ libusb_close(handle);
+ return -1;
+ }
+ if (current_config != devdesc.bNumConfigurations) {
+ struct libusb_config_descriptor *config;
+ if((res = libusb_get_active_config_descriptor(dev, &config)) != 0) {
+ usbmuxd_log(LL_NOTICE, "Could not get old configuration descriptor for device %d-%d: %d", bus, address, res);
+ } else {
+ for(j=0; j<config->bNumInterfaces; j++) {
+ const struct libusb_interface_descriptor *intf = &config->interface[j].altsetting[0];
+ if((res = libusb_kernel_driver_active(handle, intf->bInterfaceNumber)) < 0) {
+ usbmuxd_log(LL_NOTICE, "Could not check kernel ownership of interface %d for device %d-%d: %d", intf->bInterfaceNumber, bus, address, res);
+ continue;
+ }
+ if(res == 1) {
+ usbmuxd_log(LL_INFO, "Detaching kernel driver for device %d-%d, interface %d", bus, address, intf->bInterfaceNumber);
+ if((res = libusb_detach_kernel_driver(handle, intf->bInterfaceNumber)) < 0) {
+ usbmuxd_log(LL_WARNING, "Could not detach kernel driver (%d), configuration change will probably fail!", res);
+ continue;
+ }
+ }
+ }
+ libusb_free_config_descriptor(config);
+ }
+
+ usbmuxd_log(LL_INFO, "Setting configuration for device %d-%d, from %d to %d", bus, address, current_config, devdesc.bNumConfigurations);
+ if((res = libusb_set_configuration(handle, devdesc.bNumConfigurations)) != 0) {
+ usbmuxd_log(LL_WARNING, "Could not set configuration %d for device %d-%d: %d", devdesc.bNumConfigurations, bus, address, res);
+ libusb_close(handle);
+ return -1;
+ }
+ }
+
+ struct libusb_config_descriptor *config;
+ if((res = libusb_get_active_config_descriptor(dev, &config)) != 0) {
+ usbmuxd_log(LL_WARNING, "Could not get configuration descriptor for device %d-%d: %d", bus, address, res);
+ libusb_close(handle);
+ return -1;
+ }
+
+ struct usb_device *usbdev;
+ usbdev = malloc(sizeof(struct usb_device));
+ memset(usbdev, 0, sizeof(*usbdev));
+
+ for(j=0; j<config->bNumInterfaces; j++) {
+ const struct libusb_interface_descriptor *intf = &config->interface[j].altsetting[0];
+ if(intf->bInterfaceClass != INTERFACE_CLASS ||
+ intf->bInterfaceSubClass != INTERFACE_SUBCLASS ||
+ intf->bInterfaceProtocol != INTERFACE_PROTOCOL)
+ continue;
+ if(intf->bNumEndpoints != 2) {
+ usbmuxd_log(LL_WARNING, "Endpoint count mismatch for interface %d of device %d-%d", intf->bInterfaceNumber, bus, address);
+ continue;
+ }
+ if((intf->endpoint[0].bEndpointAddress & 0x80) == LIBUSB_ENDPOINT_OUT &&
+ (intf->endpoint[1].bEndpointAddress & 0x80) == LIBUSB_ENDPOINT_IN) {
+ usbdev->interface = intf->bInterfaceNumber;
+ usbdev->ep_out = intf->endpoint[0].bEndpointAddress;
+ usbdev->ep_in = intf->endpoint[1].bEndpointAddress;
+ usbmuxd_log(LL_INFO, "Found interface %d with endpoints %02x/%02x for device %d-%d", usbdev->interface, usbdev->ep_out, usbdev->ep_in, bus, address);
+ break;
+ } else if((intf->endpoint[1].bEndpointAddress & 0x80) == LIBUSB_ENDPOINT_OUT &&
+ (intf->endpoint[0].bEndpointAddress & 0x80) == LIBUSB_ENDPOINT_IN) {
+ usbdev->interface = intf->bInterfaceNumber;
+ usbdev->ep_out = intf->endpoint[1].bEndpointAddress;
+ usbdev->ep_in = intf->endpoint[0].bEndpointAddress;
+ usbmuxd_log(LL_INFO, "Found interface %d with swapped endpoints %02x/%02x for device %d-%d", usbdev->interface, usbdev->ep_out, usbdev->ep_in, bus, address);
+ break;
+ } else {
+ usbmuxd_log(LL_WARNING, "Endpoint type mismatch for interface %d of device %d-%d", intf->bInterfaceNumber, bus, address);
+ }
+ }
+
+ if(j == config->bNumInterfaces) {
+ usbmuxd_log(LL_WARNING, "Could not find a suitable USB interface for device %d-%d", bus, address);
+ libusb_free_config_descriptor(config);
+ libusb_close(handle);
+ free(usbdev);
+ return -1;
+ }
+
+ libusb_free_config_descriptor(config);
+
+ if((res = libusb_claim_interface(handle, usbdev->interface)) != 0) {
+ usbmuxd_log(LL_WARNING, "Could not claim interface %d for device %d-%d: %d", usbdev->interface, bus, address, res);
+ libusb_close(handle);
+ free(usbdev);
+ return -1;
+ }
+
+ if((res = libusb_get_string_descriptor_ascii(handle, devdesc.iSerialNumber, (uint8_t *)usbdev->serial, 256)) <= 0) {
+ usbmuxd_log(LL_WARNING, "Could not get serial number for device %d-%d: %d", bus, address, res);
+ libusb_release_interface(handle, usbdev->interface);
+ libusb_close(handle);
+ free(usbdev);
+ return -1;
+ }
+ usbdev->serial[res] = 0;
+ usbdev->bus = bus;
+ usbdev->address = address;
+ usbdev->vid = devdesc.idVendor;
+ usbdev->pid = devdesc.idProduct;
+ usbdev->speed = 480000000;
+ usbdev->dev = handle;
+ usbdev->alive = 1;
+ usbdev->wMaxPacketSize = libusb_get_max_packet_size(dev, usbdev->ep_out);
+ if (usbdev->wMaxPacketSize <= 0) {
+ usbmuxd_log(LL_ERROR, "Could not determine wMaxPacketSize for device %d-%d, setting to 64", usbdev->bus, usbdev->address);
+ usbdev->wMaxPacketSize = 64;
+ } else {
+ usbmuxd_log(LL_INFO, "Using wMaxPacketSize=%d for device %d-%d", usbdev->wMaxPacketSize, usbdev->bus, usbdev->address);
+ }
+
+ switch (libusb_get_device_speed(dev)) {
+ case LIBUSB_SPEED_LOW:
+ usbdev->speed = 1500000;
+ break;
+ case LIBUSB_SPEED_FULL:
+ usbdev->speed = 12000000;
+ break;
+ case LIBUSB_SPEED_SUPER:
+ usbdev->speed = 5000000000;
+ break;
+ case LIBUSB_SPEED_HIGH:
+ case LIBUSB_SPEED_UNKNOWN:
+ default:
+ usbdev->speed = 480000000;
+ break;
+ }
+
+ usbmuxd_log(LL_INFO, "USB Speed is %g MBit/s for device %d-%d", (double)(usbdev->speed / 1000000.0), usbdev->bus, usbdev->address);
+
+ collection_init(&usbdev->tx_xfers);
+ collection_init(&usbdev->rx_xfers);
+
+ collection_add(&device_list, usbdev);
+
+ if(device_add(usbdev) < 0) {
+ usb_disconnect(usbdev);
+ return -1;
+ }
+
+ // Spin up NUM_RX_LOOPS parallel usb data retrieval loops
+ // Old usbmuxds used only 1 rx loop, but that leaves the
+ // USB port sleeping most of the time
+ int rx_loops = NUM_RX_LOOPS;
+ for (rx_loops = NUM_RX_LOOPS; rx_loops > 0; rx_loops--) {
+ if(start_rx_loop(usbdev) < 0) {
+ usbmuxd_log(LL_WARNING, "Failed to start RX loop number %d", NUM_RX_LOOPS - rx_loops);
+ }
+ }
+
+ // Ensure we have at least 1 RX loop going
+ if (rx_loops == NUM_RX_LOOPS) {
+ usbmuxd_log(LL_FATAL, "Failed to start any RX loop for device %d-%d",
+ usbdev->bus, usbdev->address);
+ device_remove(usbdev);
+ usb_disconnect(usbdev);
+ return -1;
+ } else if (rx_loops > 0) {
+ usbmuxd_log(LL_WARNING, "Failed to start all %d RX loops. Going on with %d loops. "
+ "This may have negative impact on device read speed.",
+ NUM_RX_LOOPS, NUM_RX_LOOPS - rx_loops);
+ } else {
+ usbmuxd_log(LL_DEBUG, "All %d RX loops started successfully", NUM_RX_LOOPS);
+ }
+
+ return 0;
+}
+
int usb_discover(void)
{
- int cnt, i, j, res;
+ int cnt, i;
int valid_count = 0;
libusb_device **devs;
@@ -288,209 +501,10 @@ int usb_discover(void)
// Enumerate all USB devices and mark the ones we already know
// about as live, again
for(i=0; i<cnt; i++) {
- // the following are non-blocking operations on the device list
libusb_device *dev = devs[i];
- uint8_t bus = libusb_get_bus_number(dev);
- uint8_t address = libusb_get_device_address(dev);
- struct libusb_device_descriptor devdesc;
- int found = 0;
- FOREACH(struct usb_device *usbdev, &device_list) {
- if(usbdev->bus == bus && usbdev->address == address) {
- valid_count++;
- usbdev->alive = 1;
- found = 1;
- break;
- }
- } ENDFOREACH
- if(found)
- continue; //device already found
- if((res = libusb_get_device_descriptor(dev, &devdesc)) != 0) {
- usbmuxd_log(LL_WARNING, "Could not get device descriptor for device %d-%d: %d", bus, address, res);
- continue;
- }
- if(devdesc.idVendor != VID_APPLE)
- continue;
- if((devdesc.idProduct < PID_RANGE_LOW) ||
- (devdesc.idProduct > PID_RANGE_MAX))
- continue;
- libusb_device_handle *handle;
- usbmuxd_log(LL_INFO, "Found new device with v/p %04x:%04x at %d-%d", devdesc.idVendor, devdesc.idProduct, bus, address);
- // potentially blocking operations follow; they will only run when new devices are detected, which is acceptable
- if((res = libusb_open(dev, &handle)) != 0) {
- usbmuxd_log(LL_WARNING, "Could not open device %d-%d: %d", bus, address, res);
+ if (usb_device_add(dev) < 0) {
continue;
}
-
- int current_config = 0;
- if((res = libusb_get_configuration(handle, &current_config)) != 0) {
- usbmuxd_log(LL_WARNING, "Could not get configuration for device %d-%d: %d", bus, address, res);
- libusb_close(handle);
- continue;
- }
- if (current_config != devdesc.bNumConfigurations) {
- struct libusb_config_descriptor *config;
- if((res = libusb_get_active_config_descriptor(dev, &config)) != 0) {
- usbmuxd_log(LL_NOTICE, "Could not get old configuration descriptor for device %d-%d: %d", bus, address, res);
- } else {
- for(j=0; j<config->bNumInterfaces; j++) {
- const struct libusb_interface_descriptor *intf = &config->interface[j].altsetting[0];
- if((res = libusb_kernel_driver_active(handle, intf->bInterfaceNumber)) < 0) {
- usbmuxd_log(LL_NOTICE, "Could not check kernel ownership of interface %d for device %d-%d: %d", intf->bInterfaceNumber, bus, address, res);
- continue;
- }
- if(res == 1) {
- usbmuxd_log(LL_INFO, "Detaching kernel driver for device %d-%d, interface %d", bus, address, intf->bInterfaceNumber);
- if((res = libusb_detach_kernel_driver(handle, intf->bInterfaceNumber)) < 0) {
- usbmuxd_log(LL_WARNING, "Could not detach kernel driver (%d), configuration change will probably fail!", res);
- continue;
- }
- }
- }
- libusb_free_config_descriptor(config);
- }
-
- usbmuxd_log(LL_INFO, "Setting configuration for device %d-%d, from %d to %d", bus, address, current_config, devdesc.bNumConfigurations);
- if((res = libusb_set_configuration(handle, devdesc.bNumConfigurations)) != 0) {
- usbmuxd_log(LL_WARNING, "Could not set configuration %d for device %d-%d: %d", devdesc.bNumConfigurations, bus, address, res);
- libusb_close(handle);
- continue;
- }
- }
-
- struct libusb_config_descriptor *config;
- if((res = libusb_get_active_config_descriptor(dev, &config)) != 0) {
- usbmuxd_log(LL_WARNING, "Could not get configuration descriptor for device %d-%d: %d", bus, address, res);
- libusb_close(handle);
- continue;
- }
-
- struct usb_device *usbdev;
- usbdev = malloc(sizeof(struct usb_device));
- memset(usbdev, 0, sizeof(*usbdev));
-
- for(j=0; j<config->bNumInterfaces; j++) {
- const struct libusb_interface_descriptor *intf = &config->interface[j].altsetting[0];
- if(intf->bInterfaceClass != INTERFACE_CLASS ||
- intf->bInterfaceSubClass != INTERFACE_SUBCLASS ||
- intf->bInterfaceProtocol != INTERFACE_PROTOCOL)
- continue;
- if(intf->bNumEndpoints != 2) {
- usbmuxd_log(LL_WARNING, "Endpoint count mismatch for interface %d of device %d-%d", intf->bInterfaceNumber, bus, address);
- continue;
- }
- if((intf->endpoint[0].bEndpointAddress & 0x80) == LIBUSB_ENDPOINT_OUT &&
- (intf->endpoint[1].bEndpointAddress & 0x80) == LIBUSB_ENDPOINT_IN) {
- usbdev->interface = intf->bInterfaceNumber;
- usbdev->ep_out = intf->endpoint[0].bEndpointAddress;
- usbdev->ep_in = intf->endpoint[1].bEndpointAddress;
- usbmuxd_log(LL_INFO, "Found interface %d with endpoints %02x/%02x for device %d-%d", usbdev->interface, usbdev->ep_out, usbdev->ep_in, bus, address);
- break;
- } else if((intf->endpoint[1].bEndpointAddress & 0x80) == LIBUSB_ENDPOINT_OUT &&
- (intf->endpoint[0].bEndpointAddress & 0x80) == LIBUSB_ENDPOINT_IN) {
- usbdev->interface = intf->bInterfaceNumber;
- usbdev->ep_out = intf->endpoint[1].bEndpointAddress;
- usbdev->ep_in = intf->endpoint[0].bEndpointAddress;
- usbmuxd_log(LL_INFO, "Found interface %d with swapped endpoints %02x/%02x for device %d-%d", usbdev->interface, usbdev->ep_out, usbdev->ep_in, bus, address);
- break;
- } else {
- usbmuxd_log(LL_WARNING, "Endpoint type mismatch for interface %d of device %d-%d", intf->bInterfaceNumber, bus, address);
- }
- }
-
- if(j == config->bNumInterfaces) {
- usbmuxd_log(LL_WARNING, "Could not find a suitable USB interface for device %d-%d", bus, address);
- libusb_free_config_descriptor(config);
- libusb_close(handle);
- free(usbdev);
- continue;
- }
-
- libusb_free_config_descriptor(config);
-
- if((res = libusb_claim_interface(handle, usbdev->interface)) != 0) {
- usbmuxd_log(LL_WARNING, "Could not claim interface %d for device %d-%d: %d", usbdev->interface, bus, address, res);
- libusb_close(handle);
- free(usbdev);
- continue;
- }
-
- if((res = libusb_get_string_descriptor_ascii(handle, devdesc.iSerialNumber, (uint8_t *)usbdev->serial, 256)) <= 0) {
- usbmuxd_log(LL_WARNING, "Could not get serial number for device %d-%d: %d", bus, address, res);
- libusb_release_interface(handle, usbdev->interface);
- libusb_close(handle);
- free(usbdev);
- continue;
- }
- usbdev->serial[res] = 0;
- usbdev->bus = bus;
- usbdev->address = address;
- usbdev->vid = devdesc.idVendor;
- usbdev->pid = devdesc.idProduct;
- usbdev->speed = 480000000;
- usbdev->dev = handle;
- usbdev->alive = 1;
- usbdev->wMaxPacketSize = libusb_get_max_packet_size(dev, usbdev->ep_out);
- if (usbdev->wMaxPacketSize <= 0) {
- usbmuxd_log(LL_ERROR, "Could not determine wMaxPacketSize for device %d-%d, setting to 64", usbdev->bus, usbdev->address);
- usbdev->wMaxPacketSize = 64;
- } else {
- usbmuxd_log(LL_INFO, "Using wMaxPacketSize=%d for device %d-%d", usbdev->wMaxPacketSize, usbdev->bus, usbdev->address);
- }
-
- switch (libusb_get_device_speed(dev)) {
- case LIBUSB_SPEED_LOW:
- usbdev->speed = 1500000;
- break;
- case LIBUSB_SPEED_FULL:
- usbdev->speed = 12000000;
- break;
- case LIBUSB_SPEED_SUPER:
- usbdev->speed = 5000000000;
- break;
- case LIBUSB_SPEED_HIGH:
- case LIBUSB_SPEED_UNKNOWN:
- default:
- usbdev->speed = 480000000;
- break;
- }
-
- usbmuxd_log(LL_INFO, "USB Speed is %g MBit/s for device %d-%d", (double)(usbdev->speed / 1000000.0), usbdev->bus, usbdev->address);
-
- collection_init(&usbdev->tx_xfers);
- collection_init(&usbdev->rx_xfers);
-
- collection_add(&device_list, usbdev);
-
- if(device_add(usbdev) < 0) {
- usb_disconnect(usbdev);
- continue;
- }
-
- // Spin up NUM_RX_LOOPS parallel usb data retrieval loops
- // Old usbmuxds used only 1 rx loop, but that leaves the
- // USB port sleeping most of the time
- int rx_loops = NUM_RX_LOOPS;
- for (rx_loops = NUM_RX_LOOPS; rx_loops > 0; rx_loops--) {
- if(start_rx_loop(usbdev) < 0) {
- usbmuxd_log(LL_WARNING, "Failed to start RX loop number %d", NUM_RX_LOOPS - rx_loops);
- }
- }
-
- // Ensure we have at least 1 RX loop going
- if (rx_loops == NUM_RX_LOOPS) {
- usbmuxd_log(LL_FATAL, "Failed to start any RX loop for device %d-%d",
- usbdev->bus, usbdev->address);
- device_remove(usbdev);
- usb_disconnect(usbdev);
- continue;
- } else if (rx_loops > 0) {
- usbmuxd_log(LL_WARNING, "Failed to start all %d RX loops. Going on with %d loops. "
- "This may have negative impact on device read speed.",
- NUM_RX_LOOPS, NUM_RX_LOOPS - rx_loops);
- } else {
- usbmuxd_log(LL_DEBUG, "All %d RX loops started successfully", NUM_RX_LOOPS);
- }
-
valid_count++;
}
@@ -560,6 +574,7 @@ void usb_autodiscover(int enable)
{
usbmuxd_log(LL_DEBUG, "usb polling enable: %d", enable);
device_polling = enable;
+ device_hotplug = enable;
}
static int dev_poll_remain_ms(void)
@@ -649,6 +664,32 @@ int usb_process_timeout(int msec)
return 0;
}
+#ifdef HAVE_LIBUSB_HOTPLUG_API
+static libusb_hotplug_callback_handle usb_hotplug_cb_handle;
+
+static int usb_hotplug_cb(libusb_context *ctx, libusb_device *device, libusb_hotplug_event event, void *user_data)
+{
+ if (LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED == event) {
+ if (device_hotplug) {
+ usb_device_add(device);
+ }
+ } else if (LIBUSB_HOTPLUG_EVENT_DEVICE_LEFT == event) {
+ uint8_t bus = libusb_get_bus_number(device);
+ uint8_t address = libusb_get_device_address(device);
+ FOREACH(struct usb_device *usbdev, &device_list) {
+ if(usbdev->bus == bus && usbdev->address == address) {
+ usbdev->alive = 0;
+ device_remove(usbdev);
+ break;
+ }
+ } ENDFOREACH
+ } else {
+ usbmuxd_log(LL_ERROR, "Unhandled event %d", event);
+ }
+ return 0;
+}
+#endif
+
int usb_init(void)
{
int res;
@@ -665,12 +706,37 @@ int usb_init(void)
collection_init(&device_list);
- return usb_discover();
+#ifdef HAVE_LIBUSB_HOTPLUG_API
+ if (libusb_has_capability(LIBUSB_CAP_HAS_HOTPLUG)) {
+ usbmuxd_log(LL_INFO, "Registering for libusb hotplug events");
+ res = libusb_hotplug_register_callback(NULL, LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED | LIBUSB_HOTPLUG_EVENT_DEVICE_LEFT, LIBUSB_HOTPLUG_ENUMERATE, VID_APPLE, LIBUSB_HOTPLUG_MATCH_ANY, 0, usb_hotplug_cb, NULL, &usb_hotplug_cb_handle);
+ if (res == LIBUSB_SUCCESS) {
+ device_polling = 0;
+ } else {
+ usbmuxd_log(LL_ERROR, "ERROR: Could not register for libusb hotplug events (%d)", res);
+ }
+ } else {
+ usbmuxd_log(LL_ERROR, "libusb does not support hotplug events");
+ }
+#endif
+ if (device_polling) {
+ res = usb_discover();
+ if (res >= 0) {
+ }
+ } else {
+ res = collection_count(&device_list);
+ }
+ return res;
}
void usb_shutdown(void)
{
usbmuxd_log(LL_DEBUG, "usb_shutdown");
+
+#ifdef HAVE_LIBUSB_HOTPLUG_API
+ libusb_hotplug_deregister_callback(NULL, usb_hotplug_cb_handle);
+#endif
+
FOREACH(struct usb_device *usbdev, &device_list) {
device_remove(usbdev);
usb_disconnect(usbdev);