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#include "FloppyController.class.h"
#include "FloppyDrive.class.h"
#include <TaskManager/Task.ns.h>
#include <DeviceManager/Dev.ns.h>
#include <VFS/Part.ns.h>
using namespace Sys; //For outb/inb
//***********************************************************
// STATIC, FOR DMA
//***********************************************************
Mutex FloppyController::dmaMutex(false);
u8int FloppyController::dmabuff[FLOPPY_DMALEN]
__attribute__((aligned(0x8000)));
bool FloppyController::dmaInit(u8int direction, u32int length) {
dmaMutex.waitLock();
union {
u8int b[4];
u32int l;
} a, c; //Address, count
//We want the physical address of dmabuff. We simply remove 0xC0000000, because we've mapped memory linearly.
a.l = (u32int) &dmabuff - 0xC0000000;
c.l = (u32int) length - 1;
if (
(a.l >> 24) || //Address must be under 16mb
(c.l >> 16) || //Count must be < 64k
(((a.l & 0xFFFF) + c.l) >> 16) //We must not cross a 64k boundary
) { //Something is wrong
dmaMutex.unlock();
return false;
}
u8int mode;
switch (direction) {
case FD_READ:
mode = 0x46;
break;
case FD_WRITE:
mode = 0x4A;
break;
default: //Invalid direction
dmaMutex.unlock();
return false;
}
outb(0x0a, 0x06); //Mask chan 2
outb(0x0c, 0xff); //Reset flip-flop
outb(0x04, a.b[0]); //Address low
outb(0x04, a.b[1]); //Address high
outb(0x81, a.b[2]); //External page register
outb(0x0c, 0xff); //Reset flip-flop
outb(0x05, c.b[0]); //Count low
outb(0x05, c.b[1]); //Count high
outb(0x0b, mode); //Mode
outb(0x0a, 0x02); //Unmask chan 2
return true;
}
void FloppyController::dmaRelease() {
dmaMutex.unlock();
}
//*********************************************************
// FOR THE CONTROLLER
//*********************************************************
u32int floppyMotorTimer(void* plop) { //This will be an independant thread
while(1) {
Task::currThread()->sleep(1000); //Check only every second
Vector<Device*> floppys = Dev::findDevices("block.floppy");
for (u32int i = 0; i < floppys.size(); i++) {
FloppyDrive* f = (FloppyDrive*)floppys[i];
if (f->m_motorTimeout > 0 && f->m_motorState == FS_MOTORWAIT) {
f->m_motorTimeout--;
if (f->m_motorTimeout == 0)
f->killMotor();
}
}
}
return 0;
}
FloppyController::FloppyController(u32int base, u8int irq) : m_driveMutex(false) {
m_activeDrive = 0;
m_base = base;
m_irq = irq;
m_drives[0] = NULL;
m_drives[1] = NULL;
m_first = false;
Dev::requestIRQ(this, m_irq);
}
void FloppyController::detect() { //TODO : do this better
FloppyController *fdc = new FloppyController(0x03F0, 6); //Standard controller, IRQ6 and base port 0x03F0
Dev::registerDevice(fdc);
outb(0x70, 0x10); //CMOS detect
u8int drives = inb(0x71);
u8int fdd0 = (drives >> 4), fdd1 = (drives & 0x0F);
if (fdd0 != FT_NONE)
Dev::registerDevice(new FloppyDrive(fdc, 0, fdd0));
if (fdd1 != FT_NONE)
Dev::registerDevice(new FloppyDrive(fdc, 1, fdd1));
fdc->reset();
Vector<Device*> fdds = Dev::findDevices("block.floppy");
for (u32int i = 0; i < fdds.size(); i++) {
Part::registerDevice((BlockDevice*)fdds[i]);
}
new Thread(floppyMotorTimer, 0, true);
}
String FloppyController::getClass() {
return "controller.floppy";
}
String FloppyController::getName() {
String irq = String::number(m_irq);
return String("Floppy controller at IRQ ") += irq;
}
void FloppyController::checkInterrupt(int *st0, int *cyl) {
writeCmd(FC_SENSE_INTERRUPT);
*st0 = readData();
*cyl = readData();
}
void FloppyController::setDOR() {
u8int dor = 0x0C;
if (m_activeDrive == 1)
dor |= 0x01;
if (m_drives[0] != NULL and m_drives[0]->m_motorState != 0)
dor |= 0x10;
if (m_drives[1] != NULL and m_drives[1]->m_motorState != 0)
dor |= 0x20;
resetIrq();
outb(m_base + FR_DOR, dor);
if (m_first) { //First time we set the DOR, controller initialized
waitIrq();
int st0, cyl;
checkInterrupt(&st0, &cyl);
m_first = false;
}
}
void FloppyController::setActiveDrive(u8int drive) {
m_driveMutex.waitLock();
m_activeDrive = drive;
setDOR();
}
void FloppyController::setNoActiveDrive() {
m_driveMutex.unlock();
}
bool FloppyController::writeCmd(u8int cmd) {
for (int i = 0; i < 600; i++) {
if (0x80 & inb(m_base + FR_MSR)) {
outb(m_base + FR_FIFO, cmd);
return true;
}
Task::currThread()->sleep(10);
}
return false;
}
u8int FloppyController::readData() {
for (int i = 0; i < 600; i++) {
if (0x80 & inb(m_base + FR_MSR)) {
return inb(m_base + FR_FIFO);
}
Task::currThread()->sleep(10);
}
return 0;
}
bool FloppyController::reset() {
outb(m_base + FR_DOR, 0x00); //Disable controller
m_first = true;
if (m_drives[0] != NULL) m_drives[0]->m_motorState = 0;
if (m_drives[1] != NULL) m_drives[1]->m_motorState = 0;
setNoActiveDrive();
for (int i = 0; i < 2; i++) {
if (m_drives[i] != NULL) {
if (!m_drives[i]->setup())
return false;
}
}
return true;
}
void FloppyController::handleIRQ(registers_t regs, int irq) {
m_irqHappened = true;
}
void FloppyController::waitIrq() {
while (!m_irqHappened) Task::currThread()->sleep(10);
}
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