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| author | Mike Lockwood <lockwood@android.com> | 2010-12-29 08:47:29 -0500 |
|---|---|---|
| committer | Mike Lockwood <lockwood@android.com> | 2010-12-29 09:27:16 -0500 |
| commit | 7d700f8bdce747a26e3ee4737683194d77286ba3 (patch) | |
| tree | 18730f8f9be6efcb9a9b4eba00d307cd9d3241d5 /libusbhost | |
| parent | 123538954b9c8ad8fe7c2d755391f0b7cbaa1d6f (diff) | |
| download | system_core-7d700f8bdce747a26e3ee4737683194d77286ba3.zip system_core-7d700f8bdce747a26e3ee4737683194d77286ba3.tar.gz system_core-7d700f8bdce747a26e3ee4737683194d77286ba3.tar.bz2 | |
libusbhost: Add usb_device_get_name_from_unique_id()
This allows converting from unique IDs to USB device names
Change-Id: I8e3b300790c01383aed8e3d4f547b54bcb7c2cd4
Signed-off-by: Mike Lockwood <lockwood@android.com>
Diffstat (limited to 'libusbhost')
| -rw-r--r-- | libusbhost/usbhost.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/libusbhost/usbhost.c b/libusbhost/usbhost.c index dba0b48..dbc7962 100644 --- a/libusbhost/usbhost.c +++ b/libusbhost/usbhost.c @@ -57,6 +57,7 @@ #define USB_FS_DIR "/dev/bus/usb" #define USB_FS_ID_SCANNER "/dev/bus/usb/%d/%d" +#define USB_FS_ID_FORMAT "/dev/bus/usb/%03d/%03d" struct usb_host_context { @@ -314,6 +315,15 @@ int usb_device_get_unique_id_from_name(const char* name) return bus * 1000 + dev; } +char* usb_device_get_name_from_unique_id(int id) +{ + int bus = id / 1000; + int dev = id % 1000; + char* result = (char *)calloc(1, strlen(USB_FS_ID_FORMAT)); + snprintf(result, strlen(USB_FS_ID_FORMAT) - 1, USB_FS_ID_FORMAT, bus, dev); + return result; +} + uint16_t usb_device_get_vendor_id(struct usb_device *device) { struct usb_device_descriptor* desc = (struct usb_device_descriptor*)device->desc; |