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Kernel/USB: Add basic root port detection/management

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We can now read/write to the two root ports exposed to the
UHCI controller, and detect when a device is plugged in or
out via a kernel process that constantly scans the port
for any changes. This is very basic, but is a bit of fun to see
the kernel detecting hardware on the fly :^)
This commit is contained in:
Jesse Buhagiar 2021-01-03 00:12:54 +11:00 • committed by Andreas Kling
parent a5f895d251
commit 770a729e59
3 changed files with 65 additions and 1 deletions
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7
Kernel/Devices/USB/UHCIController.h
View file

@ -31,6 +31,8 @@
#include <Kernel/Devices/USB/UHCIDescriptorTypes.h>
#include <Kernel/IO.h>
#include <Kernel/PCI/Device.h>
#include <Kernel/Process.h>
#include <Kernel/Time/TimeManagement.h>
#include <Kernel/VM/ContiguousVMObject.h>
namespace Kernel::USB {
@ -45,6 +47,7 @@ public:
void reset();
void stop();
void start();
void spawn_port_proc();
private:
UHCIController(PCI::Address, PCI::ID);
@ -55,6 +58,8 @@ private:
u16 read_frnum() { return m_io_base.offset(0x6).in<u16>(); }
u32 read_flbaseadd() { return m_io_base.offset(0x8).in<u32>(); }
u8 read_sofmod() { return m_io_base.offset(0xc).in<u8>(); }
u16 read_portsc1() { return m_io_base.offset(0x10).in<u16>(); }
u16 read_portsc2() { return m_io_base.offset(0x12).in<u16>(); }
void write_usbcmd(u16 value) { m_io_base.offset(0).out(value); }
void write_usbsts(u16 value) { m_io_base.offset(0x2).out(value); }
@ -62,6 +67,8 @@ private:
void write_frnum(u16 value) { m_io_base.offset(0x6).out(value); }
void write_flbaseadd(u32 value) { m_io_base.offset(0x8).out(value); }
void write_sofmod(u8 value) { m_io_base.offset(0xc).out(value); }
void write_portsc1(u16 value) { m_io_base.offset(0x10).out(value); }
void write_portsc2(u16 value) { m_io_base.offset(0x12).out(value); }
virtual void handle_irq(const RegisterState&) override;