112 lines
3.8 KiB
C
112 lines
3.8 KiB
C
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#include "ps2.h"
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#include "../pic.h"
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#include "../internal.h"
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#include "internal.h"
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#include "../../../../interrupt/interrupt.h"
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#include "../../../../runtime/panic_assert.h"
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#include "../../../../runtime/stdio.h"
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#include "../../../../graphics/graphics.h"
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#include "../../../../driver/input/source.h"
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bool irq_pic_ps2_HasMouse;
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bool irq_pic_ps2_Mouse4Bytes; // the mouse has 4-byte data packages instead of 3
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queue irq_pic_ps2_QueueKeyboard, irq_pic_ps2_QueueMouse;
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uint8_t __irq_pic_ps2_QueueBufferK[IRQ_PIC_PS2_QUEUESIZE_KEYBOARD], __irq_pic_ps2_QueueBufferM[IRQ_PIC_PS2_QUEUESIZE_MOUSE];
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void irq_pic_ps2_Init() {
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assert(irq_pic_Enabled && "irq_pic_ps2_Init() requires PIC to be enabled");
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// init the Keyboard and Mouse queues
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queue_InitBuffered(&irq_pic_ps2_QueueKeyboard, __irq_pic_ps2_QueueBufferK, IRQ_PIC_PS2_QUEUESIZE_KEYBOARD);
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queue_InitBuffered(&irq_pic_ps2_QueueMouse, __irq_pic_ps2_QueueBufferM, IRQ_PIC_PS2_QUEUESIZE_MOUSE);
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uint8_t data;
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INTERRUPT_DISABLE;
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irq_pic_IRQHandler[IRQ_PIC_PS2_KEYBOARD] = irq_pic_ps2_IRQHandlerK;
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irq_pic_Mask(IRQ_PIC_PS2_KEYBOARD, false);
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// enable second PS/2 port
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io_WriteConsoleASCII("ENABLE_MOUSE... ");
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__ps2_WriteCommand(IRQ_PIC_PS2_CMD_ENABLE_MOUSE);
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io_WriteConsoleASCII("CONTROLLER_READ_CONFIGBYTE... ");
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__ps2_WriteCommand(IRQ_PIC_PS2_CMD_READ_CONFIGBYTE);
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uint8_t config = __ps2_ReadData();
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// write controller mode (|= Port1Translation)
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io_WriteConsoleASCII("CONTROLLER_WRITE_CONFIGBYTE... ");
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__ps2_WriteCommandData(IRQ_PIC_PS2_CMD_WRITE_CONFIGBYTE, config | IRQ_PIC_PS2_CONFIG_PORT1_TRANSLATION);
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if (config & IRQ_PIC_PS2_CONFIG_PORT1_CLOCK) { // mouse not present
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irq_pic_ps2_HasMouse = false;
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io_WriteConsoleASCII("PS/2 Controller has no mouse\n");
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INTERRUPT_RESTORE;
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return; // early out
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}
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// initialize the mouse
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// reset mouse
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io_WriteConsoleASCII("DEVICE_RESET... ");
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__ps2_WriteCommandData(IRQ_PIC_PS2_CMD_SEND_MOUSE, IRQ_PIC_PS2_CMD_DEVICE_RESET);
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while ((data = __ps2_ReadData()) != IRQ_PIC_PS2_RESET_OK) {
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io_Printf("%X ", data);
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}
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io_Printf("%X ", data);
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// enable 4-byte mode for mouse, pure magic!
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irq_pic_ps2_Mouse4Bytes = false;
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__ps2_SetMouseRate(200);
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__ps2_SetMouseRate(100);
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__ps2_SetMouseRate(80);
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io_WriteConsoleASCII("SEND_MOUSE(PS2_DEVICE_ID)");
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__ps2_WriteCommandData(IRQ_PIC_PS2_CMD_SEND_MOUSE, 0xf2); // get device ID
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__ps2_ReadACK();
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uint8_t id = __ps2_ReadData(); // receive device ID
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io_Printf(", MOUSE PS/2 ID=%d\n", id);
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irq_pic_ps2_Mouse4Bytes = (id == 3); // Z-axis is enabled
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irq_pic_IRQHandler[IRQ_PIC_PS2_MOUSE] = irq_pic_ps2_IRQHandlerM;
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irq_pic_Mask(IRQ_PIC_PS2_MOUSE, false);
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// set the actual mouse sample rate
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__ps2_SetMouseRate(IRQ_PIC_PS2_MOUSE_SAMPLERATE);
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// enable mouse reporting
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io_WriteConsoleASCII("MOUSE_ENABLE_REPORTING... ");
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__ps2_WriteCommandData(IRQ_PIC_PS2_CMD_SEND_MOUSE, IRQ_PIC_PS2_CMD_DEVICE_MOUSE_ENABLE_REPORTING);
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__ps2_ReadACK(); // receive ACK
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INTERRUPT_RESTORE;
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}
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SYSV_ABI void irq_pic_ps2_IRQHandlerK() {
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queue_PushByte(&irq_pic_ps2_QueueKeyboard, inb(IRQ_PIC_PS2_IOPORT));
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}
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SYSV_ABI void irq_pic_ps2_IRQHandlerM() {
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queue_PushByte(&irq_pic_ps2_QueueMouse, inb(IRQ_PIC_PS2_IOPORT));
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while (queue_Size(&irq_pic_ps2_QueueMouse) && !(queue_FrontByte(&irq_pic_ps2_QueueMouse) & (1u << 3)))
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queue_PopByte(&irq_pic_ps2_QueueMouse);
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while (queue_Size(&irq_pic_ps2_QueueMouse) >= (irq_pic_ps2_Mouse4Bytes ? 4 : 3)) {
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unsigned int moveX, moveY, state;
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state = queue_PopByte(&irq_pic_ps2_QueueMouse);
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unsigned int d = queue_PopByte(&irq_pic_ps2_QueueMouse);
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moveX = d - ((state << 4) & 0x100);
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d = queue_PopByte(&irq_pic_ps2_QueueMouse);
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moveY = d - ((state << 3) & 0x100);
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input_source_MoveMouse(moveX, -moveY);
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if (irq_pic_ps2_Mouse4Bytes)
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queue_PopByte(&irq_pic_ps2_QueueMouse);
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}
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}
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