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-rw-r--r--Source/Kernel/Devices/ATA/ATAController.class.cpp53
-rw-r--r--Source/Kernel/Devices/ATA/ATAController.class.h47
-rw-r--r--Source/Kernel/Devices/ATA/ATADrive.class.cpp71
-rw-r--r--Source/Kernel/Devices/ATA/ATADrive.class.h30
4 files changed, 201 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);
+ }
+}
diff --git a/Source/Kernel/Devices/ATA/ATAController.class.h b/Source/Kernel/Devices/ATA/ATAController.class.h
new file mode 100644
index 0000000..a12b835
--- /dev/null
+++ b/Source/Kernel/Devices/ATA/ATAController.class.h
@@ -0,0 +1,47 @@
+#ifndef DEF_ATACONTROLLER_CLASS_H
+#define DEF_ATACONTROLLER_CLASS_H
+
+#include <Devices/Device.proto.h>
+
+#define ATA_BUS1_BASE 0x1F0
+#define ATA_BUS2_BASE 0x170
+
+#define ATA_PORT_DATA 0
+#define ATA_PORT_FEATURES_ERROR 1
+#define ATA_PORT_SECT_COUNT 2
+#define ATA_PORT_PARTIAL1 3
+#define ATA_PORT_PARTIAL2 4
+#define ATA_PORT_PARTIAL3 5
+#define ATA_PORT_DRIVE_SELECT 6
+#define ATA_PORT_COMMAND 7
+
+#define ATA_CMD_IDENTIFY 0xEC
+#define ATA_CMD_READ 0x20
+#define ATA_CMD_WRITE 0x30
+
+class ATADrive;
+
+class ATAController : public Device {
+ friend class ATADrive;
+ private:
+ ATAController(u32int base, u8int number);
+
+ u32int m_base;
+ u8int m_number;
+
+ ATADrive* m_drives[2];
+
+ void writeWord(u16int port, u16int word) { Sys::outw(m_base + port, word); }
+ void writeByte(u16int port, u8int byte) { Sys::outb(m_base + port, byte); }
+ u8int readByte(u16int port) { return Sys::inb(m_base + port); }
+ u16int readWord(u16int port) { return Sys::inw(m_base + port); }
+
+ void identify(bool slave); //Identifies a drive and adds it to m_drives
+
+ public:
+ static void detect();
+ String getClass();
+ String getName();
+};
+
+#endif
diff --git a/Source/Kernel/Devices/ATA/ATADrive.class.cpp b/Source/Kernel/Devices/ATA/ATADrive.class.cpp
new file mode 100644
index 0000000..d9cc4a7
--- /dev/null
+++ b/Source/Kernel/Devices/ATA/ATADrive.class.cpp
@@ -0,0 +1,71 @@
+#include "ATADrive.class.h"
+
+String ATADrive::getClass() {
+ return "block.ata";
+}
+
+String ATADrive::getName() {
+ return String("ATA drive ") += String::number(m_ctrlr->m_number) += String(m_isSlave ? ".slave " : ".master ")
+ += String::number(m_blockCount / (1024 * 1024 / blockSize())) += "MB";
+}
+
+ATADrive::ATADrive(ATAController* ctrlr, bool isSlave, u32int blockCount, u16int* identifyData) {
+ m_ctrlr = ctrlr;
+ m_isSlave = isSlave;
+ m_blockCount = blockCount;
+ for (u32int i = 0; i < 256; i++) m_identifyData[i] = identifyData[i];
+}
+
+bool ATADrive::readOnly() {
+ return true;
+}
+
+u64int ATADrive::blocks() {
+ return m_blockCount;
+}
+
+void ATADrive::cmdCommon(u32int numblock, u32int count) {
+ m_ctrlr->writeByte(ATA_PORT_FEATURES_ERROR, 0);
+ m_ctrlr->writeByte(ATA_PORT_SECT_COUNT, count);
+ m_ctrlr->writeByte(ATA_PORT_PARTIAL1, numblock);
+ m_ctrlr->writeByte(ATA_PORT_PARTIAL2, numblock >> 8);
+ m_ctrlr->writeByte(ATA_PORT_PARTIAL3, numblock >> 16);
+
+ m_ctrlr->writeByte(ATA_PORT_DRIVE_SELECT, 0xE0 | (m_isSlave ? 0x10 : 0) | ((numblock >> 24) & 0x0F));
+}
+
+bool ATADrive::readBlocks(u64int start, u32int count, u8int* data) {
+ if (start + count >= m_blockCount) return false;
+
+ cmdCommon(start, count);
+ m_ctrlr->writeByte(ATA_PORT_COMMAND, ATA_CMD_READ);
+
+ while (!(m_ctrlr->readByte(ATA_PORT_COMMAND) & 0x08)); //Wait for the drive to be ready
+
+ for (u32int idx = 0; idx < count * 256; idx++) {
+ u16int tmpword = m_ctrlr->readWord(ATA_PORT_DATA);
+ data[idx * 2] = (u8int)tmpword;
+ data[idx * 2 + 1] = (u8int)(tmpword >> 8);
+ }
+ return true;
+}
+
+bool ATADrive::writeBlocks(u64int start, u32int count, u8int* data) {
+ if (start + count >= m_blockCount) return false;
+ if (readOnly()) return false;
+
+ cmdCommon(start, count);
+ m_ctrlr->writeByte(ATA_PORT_COMMAND, ATA_CMD_WRITE);
+
+ while (!(m_ctrlr->readByte(ATA_PORT_COMMAND) & 0x08)); //Wait for the drive to be ready
+
+ for (u32int idx = 0; idx < count * 256; idx++) {
+ u16int tmpword = (data[idx * 2]) | (data[idx * 2 + 1] << 8);
+ m_ctrlr->writeByte(ATA_PORT_DATA, tmpword);
+ }
+ return true;
+}
+
+u32int ATADrive::blockSize() {
+ return 512;
+}
diff --git a/Source/Kernel/Devices/ATA/ATADrive.class.h b/Source/Kernel/Devices/ATA/ATADrive.class.h
new file mode 100644
index 0000000..b6087bf
--- /dev/null
+++ b/Source/Kernel/Devices/ATA/ATADrive.class.h
@@ -0,0 +1,30 @@
+#ifndef DEF_ATADRIVE_CLASS_H
+#define DEF_ATADRIVE_CLASS_H
+
+#include "ATAController.class.h"
+#include <Devices/BlockDevice.proto.h>
+
+class ATADrive : public BlockDevice {
+ friend class ATAController;
+ private:
+ ATADrive(ATAController* ctrlr, bool isSlave, u32int blockCount, u16int* identifyData);
+
+ ATAController* m_ctrlr;
+ bool m_isSlave;
+ u32int m_blockCount;
+ u16int m_identifyData[256];
+
+ void cmdCommon(u32int numblock, u32int count);
+
+ public:
+ String getClass();
+ String getName();
+
+ bool readOnly();
+ u64int blocks();
+ bool readBlocks(u64int start, u32int count, u8int* data);
+ bool writeBlocks(u64int start, u32int count, u8int* data);
+ u32int blockSize();
+};
+
+#endif