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windows: Fix iSerial for composite devices.

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USB composite devices can contain an ACM serial interface.
On Windows, the correct iSerial descriptor field is assigned to the parent
(composite) device instead of to the actual serial interface. A bogus
value is returned if the serial interface is asked to provide the S/N.
This patch provides a fallback for this kind of device (tested on Android
with adb + cdc gadgets and on Arduino Zero Programming Port)
This commit is contained in:
Martino Facchin 2015-12-16 19:07:49 +01:00 committed by Martin Ling
parent aacba60dca
commit 02c8a1424d
1 changed files with 19 additions and 9 deletions
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28
windows.c
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@ -26,7 +26,7 @@
#define MAX_USB_PATH ((8 * 3) + (7 * 1) + 1)
static void enumerate_hub(struct sp_port *port, const char *hub_name,
const char *parent_path);
const char *parent_path, DEVINST dev_inst);
static char *wc_to_utf8(PWCHAR wc_buffer, ULONG size)
{
@ -149,7 +149,7 @@ static char *get_string_descriptor(HANDLE hub_device, ULONG connection_index,
}
static void enumerate_hub_ports(struct sp_port *port, HANDLE hub_device,
ULONG nb_ports, const char *parent_path)
ULONG nb_ports, const char *parent_path, DEVINST dev_inst)
{
char path[MAX_USB_PATH];
ULONG index = 0;
@ -200,7 +200,7 @@ static void enumerate_hub_ports(struct sp_port *port, HANDLE hub_device,
if ((ext_hub_name = get_external_hub_name(hub_device, index))) {
snprintf(path, sizeof(path), "%s%ld.",
parent_path, connection_info_ex->ConnectionIndex);
enumerate_hub(port, ext_hub_name, path);
enumerate_hub(port, ext_hub_name, path, dev_inst);
}
free(connection_info_ex);
} else {
@ -224,9 +224,18 @@ static void enumerate_hub_ports(struct sp_port *port, HANDLE hub_device,
if (connection_info_ex->DeviceDescriptor.iProduct)
port->usb_product = get_string_descriptor(hub_device, index,
connection_info_ex->DeviceDescriptor.iProduct);
if (connection_info_ex->DeviceDescriptor.iSerialNumber)
if (connection_info_ex->DeviceDescriptor.iSerialNumber) {
port->usb_serial = get_string_descriptor(hub_device, index,
connection_info_ex->DeviceDescriptor.iSerialNumber);
if (port->usb_serial == NULL) {
//composite device, get the parent's serial number
char device_id[MAX_DEVICE_ID_LEN];
if (CM_Get_Parent(&dev_inst, dev_inst, 0) == CR_SUCCESS) {
if (CM_Get_Device_IDA(dev_inst, device_id, sizeof(device_id), 0) == CR_SUCCESS)
port->usb_serial = strdup(strrchr(device_id, '\\')+1);
}
}
}
free(connection_info_ex);
break;
@ -235,7 +244,7 @@ static void enumerate_hub_ports(struct sp_port *port, HANDLE hub_device,
}
static void enumerate_hub(struct sp_port *port, const char *hub_name,
const char *parent_path)
const char *parent_path, DEVINST dev_inst)
{
USB_NODE_INFORMATION hub_info;
HANDLE hub_device;
@ -258,18 +267,19 @@ static void enumerate_hub(struct sp_port *port, const char *hub_name,
&hub_info, size, &hub_info, size, &size, NULL))
/* Enumerate the ports of the hub. */
enumerate_hub_ports(port, hub_device,
hub_info.u.HubInformation.HubDescriptor.bNumberOfPorts, parent_path);
hub_info.u.HubInformation.HubDescriptor.bNumberOfPorts, parent_path, dev_inst);
CloseHandle(hub_device);
}
static void enumerate_host_controller(struct sp_port *port,
HANDLE host_controller_device)
HANDLE host_controller_device,
DEVINST dev_inst)
{
char *root_hub_name;
if ((root_hub_name = get_root_hub_name(host_controller_device))) {
enumerate_hub(port, root_hub_name, "");
enumerate_hub(port, root_hub_name, "", dev_inst);
free(root_hub_name);
}
}
@ -324,7 +334,7 @@ static void get_usb_details(struct sp_port *port, DEVINST dev_inst_match)
GENERIC_WRITE, FILE_SHARE_WRITE,
NULL, OPEN_EXISTING, 0, NULL);
if (host_controller_device != INVALID_HANDLE_VALUE) {
enumerate_host_controller(port, host_controller_device);
enumerate_host_controller(port, host_controller_device, dev_inst_match);
CloseHandle(host_controller_device);
}
free(device_detail_data);