diff options
| -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 3f47cf2..57e8f5a 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) |