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Kernel/USB: Get all interface descriptors on enumeration

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This creates all interfaces when the device is enumerated, with a link
to the configuration that it is a part of. As such, a new class,
`USBInterface` has been introduced to express this state.
This commit is contained in:
Jesse Buhagiar 2022-04-15 01:11:15 +10:00 • committed by Andreas Kling
parent d313fa98ec
commit 300dcb6f5e
5 changed files with 121 additions and 4 deletions
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14
Kernel/Bus/USB/USBConfiguration.h
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@ -9,6 +9,7 @@
#include <AK/Vector.h>
#include <Kernel/Bus/USB/USBDescriptors.h>
#include <Kernel/Bus/USB/USBDevice.h>
#include <Kernel/Bus/USB/USBInterface.h>
namespace Kernel::USB {
@ -17,22 +18,27 @@ class Device;
class USBConfiguration {
public:
USBConfiguration() = delete;
USBConfiguration(Device& device, USBConfigurationDescriptor const configuration_descriptor)
USBConfiguration(Device& device, USBConfigurationDescriptor const descriptor)
: m_device(device)
, m_descriptor(configuration_descriptor)
, m_descriptor(descriptor)
{
m_interfaces.ensure_capacity(descriptor.number_of_interfaces);
}
Device const& device() const { return m_device; }
USBConfigurationDescriptor const& descriptor() const { return m_descriptor; }
u8 interface_count() const { return m_descriptor.number_of_interfaces; }
u8 configuration_id() const { return m_descriptor.configuration_value; }
u8 attributes() const { return m_descriptor.attributes_bitmap; }
u16 max_power_ma() const { return m_descriptor.max_power_in_ma * 2u; } // Note: "Power" is used incorrectly here, however it's what it's called in the descriptor/documentation
ErrorOr<void> get_interfaces();
private:
Device& m_device; // Reference to the device linked to this configuration
USBConfigurationDescriptor m_descriptor; // Descriptor that backs this configuration
Device& m_device; // Reference to the device linked to this configuration
USBConfigurationDescriptor const m_descriptor; // Descriptor that backs this configuration
Vector<USBInterface> m_interfaces; // Interfaces for this device
};
}