mirror of
https://gitlab.com/sortix/sortix.git
synced 2023-02-13 20:55:38 -05:00
Update kernel/kb/ps2.{cpp,h} to current coding conventions.
This commit is contained in:
Jonas 'Sortie' Termansen
parent
6e6df64fa8
commit
bb3b6b0260
2 changed files with 247 additions and 229 deletions
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@ -1,6 +1,6 @@
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/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2011, 2012.
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Copyright(C) Jonas 'Sortie' Termansen 2011, 2012, 2014.
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This file is part of Sortix.
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@ -23,6 +23,8 @@
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*******************************************************************************/
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#include <assert.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <string.h>
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#include <sortix/keycodes.h>
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@ -36,198 +38,210 @@
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#include "ps2.h"
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namespace Sortix
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namespace Sortix {
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const uint16_t DATA = 0x0;
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const uint16_t COMMAND = 0x0;
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const uint16_t STATUS = 0x4;
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const uint8_t CMD_SETLED = 0xED;
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const uint8_t LED_SCRLCK = 1 << 0;
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const uint8_t LED_NUMLCK = 1 << 1;
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const uint8_t LED_CAPSLCK = 1 << 2;
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void PS2Keyboard__OnInterrupt(CPU::InterruptRegisters* regs, void* user)
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{
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const uint16_t DATA = 0x0;
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const uint16_t COMMAND = 0x0;
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const uint16_t STATUS = 0x4;
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const uint8_t CMD_SETLED = 0xED;
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const uint8_t LED_SCRLCK = (1<<0);
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const uint8_t LED_NUMLCK = (1<<1);
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const uint8_t LED_CAPSLCK = (1<<2);
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void PS2Keyboard__OnInterrupt(CPU::InterruptRegisters* regs, void* user)
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{
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((PS2Keyboard*) user)->OnInterrupt(regs);
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}
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PS2Keyboard::PS2Keyboard(uint16_t iobase, uint8_t interrupt)
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{
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this->queue = NULL;
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this->queuelength = 0;
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this->queueoffset = 0;
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this->queueused = 0;
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this->owner = NULL;
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this->ownerptr = NULL;
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this->iobase = iobase;
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this->interrupt = interrupt;
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this->leds = 0;
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this->scancodeescaped = false;
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this->kblock = KTHREAD_MUTEX_INITIALIZER;
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Interrupt::RegisterHandler(interrupt, PS2Keyboard__OnInterrupt, this);
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// If any scancodes were already pending, our interrupt handler will
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// never be called. Let's just discard anything pending.
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PopScancode();
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}
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PS2Keyboard::~PS2Keyboard()
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{
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Interrupt::RegisterHandler(interrupt, NULL, NULL);
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delete[] queue;
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}
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struct PS2KeyboardWork
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{
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PS2Keyboard* kb;
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uint8_t scancode;
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};
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static void PS2Keyboard__InterruptWork(void* payload, size_t size)
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{
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assert(size == sizeof(PS2KeyboardWork));
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PS2KeyboardWork* work = (PS2KeyboardWork*) payload;
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work->kb->InterruptWork(work->scancode);
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}
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void PS2Keyboard::OnInterrupt(CPU::InterruptRegisters* regs)
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{
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uint8_t scancode = PopScancode();
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if ( scancode == KBKEY_F10 )
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{
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CurrentThread()->SaveRegisters(regs);
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Debugger::Run();
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}
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PS2KeyboardWork work;
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work.kb = this;
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work.scancode = scancode;
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Interrupt::ScheduleWork(PS2Keyboard__InterruptWork, &work, sizeof(work));
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}
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void PS2Keyboard::InterruptWork(uint8_t scancode)
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{
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kthread_mutex_lock(&kblock);
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int kbkey = DecodeScancode(scancode);
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if ( !kbkey ) { kthread_mutex_unlock(&kblock); return; }
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if ( !PushKey(kbkey) )
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{
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Log::PrintF("Warning: dropping keystroke due to insufficient "
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"storage space in PS2 keyboard driver.\n");
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kthread_mutex_unlock(&kblock);
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return;
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}
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uint8_t newleds = leds;
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if ( kbkey == KBKEY_CAPSLOCK ) { newleds ^= LED_CAPSLCK; }
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if ( kbkey == KBKEY_SCROLLLOCK ) { newleds ^= LED_SCRLCK; }
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if ( kbkey == KBKEY_NUMLOCK ) { newleds ^= LED_NUMLCK; }
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if ( newleds != leds ) { UpdateLEDs(leds = newleds); }
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kthread_mutex_unlock(&kblock);
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NotifyOwner();
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}
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void PS2Keyboard::NotifyOwner()
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{
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if ( !owner) { return; }
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owner->OnKeystroke(this, ownerptr);
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}
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int PS2Keyboard::DecodeScancode(uint8_t scancode)
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{
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const uint8_t SCANCODE_ESCAPE = 0xE0;
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if ( scancode == SCANCODE_ESCAPE )
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{
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scancodeescaped = true;
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return 0;
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}
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int offset = (scancodeescaped) ? 0x80 : 0;
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int kbkey = scancode & 0x7F;
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if ( scancode & 0x80 ) { kbkey = -kbkey - offset; }
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else { kbkey = kbkey + offset; }
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scancodeescaped = false;
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// kbkey is now in the format specified in <sortix/keycodes.h>.
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return kbkey;
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}
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uint8_t PS2Keyboard::PopScancode()
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{
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return CPU::InPortB(iobase + DATA);
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}
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void PS2Keyboard::UpdateLEDs(int ledval)
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{
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while ( (CPU::InPortB(iobase + STATUS) & (1<<1)) != 0 ) { }
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CPU::OutPortB(iobase + COMMAND, CMD_SETLED);
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while ( (CPU::InPortB(iobase + STATUS) & (1<<1)) != 0 ) { }
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CPU::OutPortB(iobase + COMMAND, ledval);
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}
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void PS2Keyboard::SetOwner(KeyboardOwner* owner, void* user)
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{
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kthread_mutex_lock(&kblock);
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this->owner = owner;
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this->ownerptr = user;
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kthread_mutex_unlock(&kblock);
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if ( queueused ) { NotifyOwner(); }
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}
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bool PS2Keyboard::PushKey(int key)
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{
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// Check if we need to allocate or resize the circular queue.
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if ( queueused == queuelength )
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{
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size_t newqueuelength = (queuelength) ? queuelength * 2 : 32UL;
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int* newqueue = new int[newqueuelength];
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if ( !newqueue ) { return false; }
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size_t elemsize = sizeof(*queue);
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size_t leadingavai = queuelength-queueoffset;
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size_t leading = (leadingavai < queueused) ? leadingavai : queueused;
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size_t trailing = queueused - leading;
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memcpy(newqueue, queue + queueoffset, leading * elemsize);
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memcpy(newqueue + leading, queue, trailing * elemsize);
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delete[] queue;
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queue = newqueue;
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queuelength = newqueuelength;
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queueoffset = 0;
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}
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queue[(queueoffset + queueused++) % queuelength] = key;
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return true;
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}
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int PS2Keyboard::PopKey()
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{
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if ( !queueused ) { return 0; }
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int kbkey = queue[queueoffset];
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queueoffset = (queueoffset + 1) % queuelength;
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queueused--;
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return kbkey;
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}
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int PS2Keyboard::Read()
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{
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ScopedLock lock(&kblock);
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return PopKey();
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}
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size_t PS2Keyboard::GetPending() const
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{
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ScopedLock lock(&kblock);
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return queueused;
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}
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bool PS2Keyboard::HasPending() const
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{
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ScopedLock lock(&kblock);
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return queueused;
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}
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((PS2Keyboard*) user)->OnInterrupt(regs);
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}
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PS2Keyboard::PS2Keyboard(uint16_t iobase, uint8_t interrupt)
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{
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this->queue = NULL;
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this->queuelength = 0;
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this->queueoffset = 0;
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this->queueused = 0;
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this->owner = NULL;
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this->ownerptr = NULL;
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this->iobase = iobase;
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this->interrupt = interrupt;
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this->leds = 0;
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this->scancodeescaped = false;
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this->kblock = KTHREAD_MUTEX_INITIALIZER;
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Interrupt::RegisterHandler(interrupt, PS2Keyboard__OnInterrupt, this);
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// If any scancodes were already pending, our interrupt handler will
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// never be called. Let's just discard anything pending.
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PopScancode();
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}
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PS2Keyboard::~PS2Keyboard()
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{
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Interrupt::RegisterHandler(interrupt, NULL, NULL);
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delete[] queue;
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}
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struct PS2KeyboardWork
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{
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PS2Keyboard* kb;
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uint8_t scancode;
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};
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static void PS2Keyboard__InterruptWork(void* payload, size_t size)
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{
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assert(size == sizeof(PS2KeyboardWork));
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PS2KeyboardWork* work = (PS2KeyboardWork*) payload;
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work->kb->InterruptWork(work->scancode);
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}
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void PS2Keyboard::OnInterrupt(CPU::InterruptRegisters* regs)
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{
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uint8_t scancode = PopScancode();
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if ( scancode == KBKEY_F10 )
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{
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CurrentThread()->SaveRegisters(regs);
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Debugger::Run();
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}
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PS2KeyboardWork work;
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work.kb = this;
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work.scancode = scancode;
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Interrupt::ScheduleWork(PS2Keyboard__InterruptWork, &work, sizeof(work));
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}
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void PS2Keyboard::InterruptWork(uint8_t scancode)
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{
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kthread_mutex_lock(&kblock);
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int kbkey = DecodeScancode(scancode);
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if ( !kbkey )
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{
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kthread_mutex_unlock(&kblock);
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return;
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}
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if ( !PushKey(kbkey) )
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{
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Log::PrintF("Warning: dropping keystroke due to insufficient "
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"storage space in PS2 keyboard driver.\n");
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kthread_mutex_unlock(&kblock);
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return;
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}
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uint8_t newleds = leds;
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if ( kbkey == KBKEY_CAPSLOCK )
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newleds ^= LED_CAPSLCK;
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if ( kbkey == KBKEY_SCROLLLOCK )
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newleds ^= LED_SCRLCK;
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if ( kbkey == KBKEY_NUMLOCK )
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newleds ^= LED_NUMLCK;
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if ( newleds != leds )
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UpdateLEDs(leds = newleds);
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kthread_mutex_unlock(&kblock);
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NotifyOwner();
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}
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void PS2Keyboard::NotifyOwner()
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{
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if ( !owner)
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return;
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owner->OnKeystroke(this, ownerptr);
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}
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int PS2Keyboard::DecodeScancode(uint8_t scancode)
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{
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const uint8_t SCANCODE_ESCAPE = 0xE0;
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if ( scancode == SCANCODE_ESCAPE )
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{
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scancodeescaped = true;
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return 0;
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}
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int offset = scancodeescaped ? 0x80 : 0;
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int kbkey = scancode & 0x7F;
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kbkey = scancode & 0x80 ? -kbkey - offset : kbkey + offset;
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scancodeescaped = false;
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// kbkey is now in the format specified in <sortix/keycodes.h>.
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return kbkey;
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}
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uint8_t PS2Keyboard::PopScancode()
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{
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return CPU::InPortB(iobase + DATA);
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}
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void PS2Keyboard::UpdateLEDs(int ledval)
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{
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while ( (CPU::InPortB(iobase + STATUS) & (1<<1)) );
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CPU::OutPortB(iobase + COMMAND, CMD_SETLED);
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while ( (CPU::InPortB(iobase + STATUS) & (1<<1)) );
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CPU::OutPortB(iobase + COMMAND, ledval);
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}
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void PS2Keyboard::SetOwner(KeyboardOwner* owner, void* user)
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{
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kthread_mutex_lock(&kblock);
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this->owner = owner;
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this->ownerptr = user;
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kthread_mutex_unlock(&kblock);
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if ( queueused )
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NotifyOwner();
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}
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bool PS2Keyboard::PushKey(int key)
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{
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// Check if we need to allocate or resize the circular queue.
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if ( queueused == queuelength )
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{
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size_t newqueuelength = (queuelength) ? queuelength * 2 : 32UL;
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int* newqueue = new int[newqueuelength];
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if ( !newqueue )
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return false;
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size_t elemsize = sizeof(*queue);
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size_t leadingavai = queuelength-queueoffset;
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size_t leading = (leadingavai < queueused) ? leadingavai : queueused;
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size_t trailing = queueused - leading;
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memcpy(newqueue, queue + queueoffset, leading * elemsize);
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memcpy(newqueue + leading, queue, trailing * elemsize);
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delete[] queue;
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queue = newqueue;
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queuelength = newqueuelength;
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queueoffset = 0;
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}
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queue[(queueoffset + queueused++) % queuelength] = key;
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return true;
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}
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int PS2Keyboard::PopKey()
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{
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if ( !queueused )
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return 0;
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int kbkey = queue[queueoffset];
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queueoffset = (queueoffset + 1) % queuelength;
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queueused--;
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return kbkey;
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}
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int PS2Keyboard::Read()
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{
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ScopedLock lock(&kblock);
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return PopKey();
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}
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size_t PS2Keyboard::GetPending() const
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{
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ScopedLock lock(&kblock);
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return queueused;
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}
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bool PS2Keyboard::HasPending() const
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{
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ScopedLock lock(&kblock);
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return queueused;
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}
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} // namespace Sortix
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@ -1,6 +1,6 @@
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/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2011, 2012.
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Copyright(C) Jonas 'Sortie' Termansen 2011, 2012, 2014.
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This file is part of Sortix.
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@ -25,47 +25,51 @@
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#ifndef SORTIX_KB_PS2_H
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#define SORTIX_KB_PS2_H
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#include <stddef.h>
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#include <stdint.h>
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#include <sortix/kernel/kthread.h>
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#include <sortix/kernel/keyboard.h>
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namespace Sortix
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namespace Sortix {
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class PS2Keyboard : public Keyboard
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{
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class PS2Keyboard : public Keyboard
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{
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public:
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PS2Keyboard(uint16_t iobase, uint8_t interrupt);
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virtual ~PS2Keyboard();
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virtual int Read();
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virtual size_t GetPending() const;
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virtual bool HasPending() const;
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virtual void SetOwner(KeyboardOwner* owner, void* user);
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public:
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PS2Keyboard(uint16_t iobase, uint8_t interrupt);
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virtual ~PS2Keyboard();
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virtual int Read();
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virtual size_t GetPending() const;
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virtual bool HasPending() const;
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virtual void SetOwner(KeyboardOwner* owner, void* user);
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public:
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void OnInterrupt(CPU::InterruptRegisters* regs);
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void InterruptWork(uint8_t scancode);
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public:
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void OnInterrupt(CPU::InterruptRegisters* regs);
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void InterruptWork(uint8_t scancode);
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private:
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uint8_t PopScancode();
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int DecodeScancode(uint8_t scancode);
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void UpdateLEDs(int ledval);
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bool PushKey(int key);
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int PopKey();
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void NotifyOwner();
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private:
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uint8_t PopScancode();
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int DecodeScancode(uint8_t scancode);
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void UpdateLEDs(int ledval);
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bool PushKey(int key);
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int PopKey();
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void NotifyOwner();
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private:
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int* queue;
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size_t queuelength;
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size_t queueoffset;
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size_t queueused;
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KeyboardOwner* owner;
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void* ownerptr;
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uint16_t iobase;
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uint8_t interrupt;
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bool scancodeescaped;
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uint8_t leds;
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mutable kthread_mutex_t kblock;
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private:
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int* queue;
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size_t queuelength;
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size_t queueoffset;
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size_t queueused;
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KeyboardOwner* owner;
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void* ownerptr;
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uint16_t iobase;
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uint8_t interrupt;
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bool scancodeescaped;
|
||||
uint8_t leds;
|
||||
mutable kthread_mutex_t kblock;
|
||||
|
||||
};
|
||||
}
|
||||
};
|
||||
|
||||
} // namespace Sortix
|
||||
|
||||
#endif
|
||||
|
|
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|||
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Reference in a new issue