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Kernel/USB: Add the USB 1.x/2.0 hub descriptor

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There is a different hub descriptor for USB 3.0, but this isn't
included here.
This commit is contained in:
Luke 2021-08-10 02:14:36 +01:00 committed by Andreas Kling
parent 14da080dcf
commit 9dcd146ab4
Notes: sideshowbarker 2024-07-18 05:43:53 +09:00 
Author: https://github.com/Lubrsi
Commit: https://github.com/SerenityOS/serenity/commit/9dcd146ab4a
Pull-request: https://github.com/SerenityOS/serenity/pull/9394
Reviewed-by: https://github.com/supercomputer7
1 changed files with 14 additions and 0 deletions
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Kernel/Bus/USB/USBDescriptors.h
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@ -94,11 +94,25 @@ struct [[gnu::packed]] USBEndpointDescriptor {
u8 poll_interval_in_frames;
};
//
// USB 1.1/2.0 Hub Descriptor
// ==============
//
struct [[gnu::packed]] USBHubDescriptor {
USBDescriptorCommon descriptor_header;
u8 number_of_downstream_ports;
u16 hub_characteristics;
u8 power_on_to_power_good_time;
u8 hub_controller_current;
// NOTE: This does not contain DeviceRemovable or PortPwrCtrlMask because a struct cannot have two VLAs in a row.
};
static constexpr u8 DESCRIPTOR_TYPE_DEVICE = 0x01;
static constexpr u8 DESCRIPTOR_TYPE_CONFIGURATION = 0x02;
static constexpr u8 DESCRIPTOR_TYPE_STRING = 0x03;
static constexpr u8 DESCRIPTOR_TYPE_INTERFACE = 0x04;
static constexpr u8 DESCRIPTOR_TYPE_ENDPOINT = 0x05;
static constexpr u8 DESCRIPTOR_TYPE_DEVICE_QUALIFIER = 0x06;
static constexpr u8 DESCRIPTOR_TYPE_HUB = 0x29;
}