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Kernel/USB: Create controller base class and introduce USBManagement

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This removes Pipes dependency on the UHCIController by introducing a
controller base class. This will be used to implement other controllers
such as OHCI.

Additionally, there can be multiple instances of a UHCI controller.
For example, multiple UHCI instances can be required for systems with
EHCI controllers. EHCI relies on using multiple of either UHCI or OHCI
controllers to drive USB 1.x devices.

This means UHCIController can no longer be a singleton. Multiple
instances of it can now be created and passed to the device and then to
the pipe.

To handle finding and creating these instances, USBManagement has been
introduced. It has the same pattern as the other management classes
such as NetworkManagement.
This commit is contained in:
Luke 2021-08-08 19:50:20 +01:00 • committed by Andreas Kling
parent c5974d3518
commit 7a86a8df90
14 changed files with 261 additions and 74 deletions
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74
Kernel/Bus/USB/USBManagement.cpp Normal file
View file

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/*
* Copyright (c) 2021, Luke Wilde <lukew@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Singleton.h>
#include <Kernel/Bus/PCI/Access.h>
#include <Kernel/Bus/USB/UHCIController.h>
#include <Kernel/Bus/USB/USBManagement.h>
#include <Kernel/CommandLine.h>
#include <Kernel/Sections.h>
namespace Kernel::USB {
static Singleton<USBManagement> s_the;
UNMAP_AFTER_INIT USBManagement::USBManagement()
{
enumerate_controllers();
}
UNMAP_AFTER_INIT void USBManagement::enumerate_controllers()
{
if (!kernel_command_line().disable_usb()) {
PCI::enumerate([this](PCI::Address const& address, PCI::ID) {
if (PCI::get_class(address) == 0xc && PCI::get_subclass(address) == 0x3) {
if (PCI::get_programming_interface(address) == 0x0) {
if (kernel_command_line().disable_uhci_controller())
return;
if (auto uhci_controller_or_error = UHCIController::try_to_initialize(address); !uhci_controller_or_error.is_error())
m_controllers.append(uhci_controller_or_error.release_value());
return;
}
if (PCI::get_programming_interface(address) == 0x10) {
dmesgln("USBManagement: OHCI controller found at {} is not currently supported.", address);
return;
}
if (PCI::get_programming_interface(address) == 0x20) {
dmesgln("USBManagement: EHCI controller found at {} is not currently supported.", address);
return;
}
if (PCI::get_programming_interface(address) == 0x30) {
dmesgln("USBManagement: xHCI controller found at {} is not currently supported.", address);
return;
}
dmesgln("USBManagement: Unknown/unsupported controller at {} with programming interface 0x{:02x}", address, PCI::get_programming_interface(address));
}
});
}
}
bool USBManagement::initialized()
{
return s_the.is_initialized();
}
UNMAP_AFTER_INIT void USBManagement::initialize()
{
s_the.ensure_instance();
}
USBManagement& USBManagement::the()
{
return *s_the;
}
}