Reading from HDD is now possible !

1 files changed, 53 insertions, 0 deletions

diff --git a/Source/Kernel/Devices/ATA/ATAController.class.cpp b/Source/Kernel/Devices/ATA/ATAController.class.cpp
new file mode 100644
index 0000000..69a18a4
--- /dev/null
+++ b/Source/Kernel/Devices/ATA/ATAController.class.cpp
@@ -0,0 +1,53 @@
+#include "ATADrive.class.h"
+
+#include <DeviceManager/Dev.ns.h>
+#include <VFS/Part.ns.h>
+
+String ATAController::getClass() {
+	return "controller.ata";
+}
+
+String ATAController::getName() {
+	return String("ATA controller #") + String::number(m_number);
+}
+
+void ATAController::detect() {
+	ATAController *c[2];
+	c[0] = new ATAController(ATA_BUS1_BASE, 0);
+	c[1] = new ATAController(ATA_BUS2_BASE, 1);
+	Dev::registerDevice(c[0]); Dev::registerDevice(c[1]);
+	for (u32int d = 0; d < 2; d++) {
+		for (u32int r = 0; r < 2; r++) {
+			ATADrive* drv = c[d]->m_drives[r];
+			if (drv != 0) {
+				Dev::registerDevice(drv);
+				Part::registerDevice(drv);
+			}
+		}
+	}
+}
+
+ATAController::ATAController(u32int base, u8int number) {
+	m_base = base; m_number = number;
+	m_drives[0] = NULL; m_drives[1] = NULL;
+	identify(false);	//Identify master device
+	identify(true);		//Identify slave device
+}
+
+void ATAController::identify(bool slave) {
+	if (m_drives[(slave ? 1 : 0)] != NULL) return;
+	writeByte(ATA_PORT_DRIVE_SELECT, (slave ? 0xB0 : 0xA0)); 
+	writeByte(ATA_PORT_COMMAND, ATA_CMD_IDENTIFY);
+	u8int ret = readByte(ATA_PORT_COMMAND);
+	if (ret == 0) return;	//Drive does not exist
+	while ((ret & 0x88) != 0x08 and (ret & 1) != 1) {
+		ret = readByte(ATA_PORT_COMMAND);
+	}
+	if ((ret & 1) == 1) return;	//Error while IDENTIFY
+	u16int data[256];
+	for (u32int i = 0; i < 256; i++) data[i] = readWord(ATA_PORT_DATA);
+	u32int blocks = (data[61] << 16) | data[60];
+	if (blocks != 0) {	//Drive supports LBA28
+		m_drives[(slave ? 1 : 0)] = new ATADrive(this, slave, blocks, data);
+	}
+}