diff options
| author | Hans de Goede <hdegoede@redhat.com> | 2011-02-17 15:06:40 +0100 |
|---|---|---|
| committer | Hans de Goede <hdegoede@redhat.com> | 2011-06-17 11:01:21 +0200 |
| commit | 1f08f5781454b50b89b3263a111c20e011cf1ab2 (patch) | |
| tree | d518bb7f8d890af4bc3e80d63ebba28c37230fb6 | |
| parent | e42841fe375d33a2124faa0579880233918ea755 (diff) | |
| download | libusb-1f08f5781454b50b89b3263a111c20e011cf1ab2.tar.gz | |
linux: Read the device speed from sysfs
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
| -rw-r--r-- | libusb/os/linux_usbfs.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/libusb/os/linux_usbfs.c b/libusb/os/linux_usbfs.c index 9cef695..bfadfbd 100644 --- a/libusb/os/linux_usbfs.c +++ b/libusb/os/linux_usbfs.c @@ -784,7 +784,7 @@ static int initialize_device(struct libusb_device *dev, uint8_t busnum, struct linux_device_priv *priv = __device_priv(dev); unsigned char *dev_buf; char path[PATH_MAX]; - int fd; + int fd, speed; int active_config = 0; int device_configured = 1; ssize_t r; @@ -797,6 +797,20 @@ static int initialize_device(struct libusb_device *dev, uint8_t busnum, if (!priv->sysfs_dir) return LIBUSB_ERROR_NO_MEM; strcpy(priv->sysfs_dir, sysfs_dir); + + /* Note speed can contain 1.5, in this case __read_sysfs_attr + will stop parsing at the '.' and return 1 */ + speed = __read_sysfs_attr(DEVICE_CTX(dev), sysfs_dir, "speed"); + if (speed >= 0) { + switch (speed) { + case 1: dev->speed = LIBUSB_SPEED_LOW; break; + case 12: dev->speed = LIBUSB_SPEED_FULL; break; + case 480: dev->speed = LIBUSB_SPEED_HIGH; break; + case 5000: dev->speed = LIBUSB_SPEED_SUPER; break; + default: + usbi_warn(DEVICE_CTX(dev), "Unknown device speed: %d Mbps", speed); + } + } } if (sysfs_has_descriptors) |