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This commit is contained in:
kudzu_cp 2011-02-15 00:19:08 +00:00
parent 7e21b4e765
commit 2b81d7cdf2
1 changed files with 11 additions and 9 deletions
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20
source2/Kernel/System/Hardware/Cosmos.Hardware/ATA.cs
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@ -12,7 +12,7 @@ namespace Cosmos.Hardware {
IO = aIO; IO = aIO;
} }
[Flags] enum Status : byte {None = 0x00, Busy = 0x80, ATA_SR_DRD = 0x40, ATA_SR_DF = 0x20, ATA_SR_DSC = 0x10, DRQ = 0x08, ATA_SR_COR = 0x04, ATA_SR_IDX = 0x02, Error = 0x01 }; [Flags] public enum Status : byte {None = 0x00, Busy = 0x80, ATA_SR_DRD = 0x40, ATA_SR_DF = 0x20, ATA_SR_DSC = 0x10, DRQ = 0x08, ATA_SR_COR = 0x04, ATA_SR_IDX = 0x02, Error = 0x01 };
[Flags] enum Error : byte { ATA_ER_BBK = 0x80, ATA_ER_UNC = 0x40, ATA_ER_MC = 0x20, ATA_ER_IDNF = 0x10, ATA_ER_MCR = 0x08, ATA_ER_ABRT = 0x04, ATA_ER_TK0NF = 0x02, ATA_ER_AMNF = 0x01 }; [Flags] enum Error : byte { ATA_ER_BBK = 0x80, ATA_ER_UNC = 0x40, ATA_ER_MC = 0x20, ATA_ER_IDNF = 0x10, ATA_ER_MCR = 0x08, ATA_ER_ABRT = 0x04, ATA_ER_TK0NF = 0x02, ATA_ER_AMNF = 0x01 };
[Flags] [Flags]
enum DvcSelVal : byte { enum DvcSelVal : byte {
@ -54,28 +54,31 @@ namespace Cosmos.Hardware {
Wait(); Wait();
} }
public Status GetStatus() {
return (Status)IO.Status.Byte;
}
public void Test() { public void Test() {
// Disable IRQs: // Disable IRQs:
IO.Control.Byte = 0x02; IO.Control.Byte = 0x02;
int xCount = 0; int xCount = 0;
for (int xDrive = 0; xDrive <= 1; xDrive++) { for (int xDrive = 0; xDrive <= 1; xDrive++) {
byte xErr = 0; bool xError = false;
SelectDrive((DriveSelect)xDrive); SelectDrive((DriveSelect)xDrive);
SendCmd(Cmd.Identify); SendCmd(Cmd.Identify);
// Polling // Polling
// No drive found // No drive found
if (IO.Status.Byte == 0) { if (GetStatus() == Status.None) {
continue; continue;
} }
while (true) { while (true) {
Status xStatus; var xStatus = GetStatus();
xStatus = (Status)IO.Status.Byte;
if ((xStatus & Status.Error) == Status.None) { if ((xStatus & Status.Error) == Status.None) {
// Device is not ATA // Device is not ATA
xErr = 1; xError = true;
break; break;
} else if ((xStatus & Status.Busy) == Status.None && (xStatus & Status.DRQ) != Status.None) { } else if ((xStatus & Status.Busy) == Status.None && (xStatus & Status.DRQ) != Status.None) {
// Found drive and its ok // Found drive and its ok
@ -83,16 +86,15 @@ namespace Cosmos.Hardware {
} }
} }
// Look for ATAPI devices
var xType = SpecLevel.ATA; var xType = SpecLevel.ATA;
if (xErr == 0) { if (!xError) {
int xTypeId = IO.LBA2.Byte << 8 | IO.LBA1.Byte; int xTypeId = IO.LBA2.Byte << 8 | IO.LBA1.Byte;
if (xTypeId == 0xEB14 || xTypeId == 0x9669) { if (xTypeId == 0xEB14 || xTypeId == 0x9669) {
xType = SpecLevel.ATAPI;
} else { } else {
// Unknown type. Might not be a device. // Unknown type. Might not be a device.
continue; continue;
} }
xType = SpecLevel.ATAPI;
} }
SendCmd(Cmd.IdentifyPacket); SendCmd(Cmd.IdentifyPacket);