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matos/drivers/ata.c
Mathieu Maret 2b32908029 load userspace from disk
2021-11-05 23:02:23 +01:00

734 lines
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#include "alloc.h"
#include "ata.h"
#include "io.h"
#include "irq.h"
#include "kernel.h"
#include "klibc.h"
#include "list.h"
#include "thread.h"
#define PART_TABLE_OFFSET 0x1BE
static struct ata_partition *partitions;
static int nextPartitionId = 0;
// from
// https://docs.microsoft.com/en-us/windows-hardware/drivers/ddi/ata/ns-ata-_identify_device_data
struct _IDENTIFY_DEVICE_DATA {
struct {
uint16_t Reserved1 : 1;
uint16_t Retired3 : 1;
uint16_t ResponseIncomplete : 1;
uint16_t Retired2 : 3;
uint16_t FixedDevice : 1;
uint16_t RemovableMedia : 1;
uint16_t Retired1 : 7;
uint16_t DeviceType : 1;
} GeneralConfiguration;
uint16_t NumCylinders;
uint16_t SpecificConfiguration;
uint16_t NumHeads;
uint16_t Retired1[2];
uint16_t NumSectorsPerTrack;
uint16_t VendorUnique1[3];
uint8_t SerialNumber[20];
uint16_t Retired2[2];
uint16_t Obsolete1;
uint8_t FirmwareRevision[8];
uint8_t ModelNumber[40];
uint8_t MaximumBlockTransfer;
uint8_t VendorUnique2;
struct {
uint16_t FeatureSupported : 1;
uint16_t Reserved : 15;
} TrustedComputing;
struct {
uint8_t CurrentLongPhysicalSectorAlignment : 2;
uint8_t ReservedByte49 : 6;
uint8_t DmaSupported : 1;
uint8_t LbaSupported : 1;
uint8_t IordyDisable : 1;
uint8_t IordySupported : 1;
uint8_t Reserved1 : 1;
uint8_t StandybyTimerSupport : 1;
uint8_t Reserved2 : 2;
uint16_t ReservedWord50;
} Capabilities;
uint16_t ObsoleteWords51[2];
uint16_t TranslationFieldsValid : 3;
uint16_t Reserved3 : 5;
uint16_t FreeFallControlSensitivity : 8;
uint16_t NumberOfCurrentCylinders;
uint16_t NumberOfCurrentHeads;
uint16_t CurrentSectorsPerTrack;
uint32_t CurrentSectorCapacity;
uint8_t CurrentMultiSectorSetting;
uint8_t MultiSectorSettingValid : 1;
uint8_t ReservedByte59 : 3;
uint8_t SanitizeFeatureSupported : 1;
uint8_t CryptoScrambleExtCommandSupported : 1;
uint8_t OverwriteExtCommandSupported : 1;
uint8_t BlockEraseExtCommandSupported : 1;
uint32_t UserAddressableSectors;
uint16_t ObsoleteWord62;
uint16_t MultiWordDMASupport : 8;
uint16_t MultiWordDMAActive : 8;
uint16_t AdvancedPIOModes : 8;
uint16_t ReservedByte64 : 8;
uint16_t MinimumMWXferCycleTime;
uint16_t RecommendedMWXferCycleTime;
uint16_t MinimumPIOCycleTime;
uint16_t MinimumPIOCycleTimeIORDY;
struct {
uint16_t ZonedCapabilities : 2;
uint16_t NonVolatileWriteCache : 1;
uint16_t ExtendedUserAddressableSectorsSupported : 1;
uint16_t DeviceEncryptsAllUserData : 1;
uint16_t ReadZeroAfterTrimSupported : 1;
uint16_t Optional28BitCommandsSupported : 1;
uint16_t IEEE1667 : 1;
uint16_t DownloadMicrocodeDmaSupported : 1;
uint16_t SetMaxSetPasswordUnlockDmaSupported : 1;
uint16_t WriteBufferDmaSupported : 1;
uint16_t ReadBufferDmaSupported : 1;
uint16_t DeviceConfigIdentifySetDmaSupported : 1;
uint16_t LPSAERCSupported : 1;
uint16_t DeterministicReadAfterTrimSupported : 1;
uint16_t CFastSpecSupported : 1;
} AdditionalSupported;
uint16_t ReservedWords70[5];
uint16_t QueueDepth : 5;
uint16_t ReservedWord75 : 11;
struct {
uint16_t Reserved0 : 1;
uint16_t SataGen1 : 1;
uint16_t SataGen2 : 1;
uint16_t SataGen3 : 1;
uint16_t Reserved1 : 4;
uint16_t NCQ : 1;
uint16_t HIPM : 1;
uint16_t PhyEvents : 1;
uint16_t NcqUnload : 1;
uint16_t NcqPriority : 1;
uint16_t HostAutoPS : 1;
uint16_t DeviceAutoPS : 1;
uint16_t ReadLogDMA : 1;
uint16_t Reserved2 : 1;
uint16_t CurrentSpeed : 3;
uint16_t NcqStreaming : 1;
uint16_t NcqQueueMgmt : 1;
uint16_t NcqReceiveSend : 1;
uint16_t DEVSLPtoReducedPwrState : 1;
uint16_t Reserved3 : 8;
} SerialAtaCapabilities;
struct {
uint16_t Reserved0 : 1;
uint16_t NonZeroOffsets : 1;
uint16_t DmaSetupAutoActivate : 1;
uint16_t DIPM : 1;
uint16_t InOrderData : 1;
uint16_t HardwareFeatureControl : 1;
uint16_t SoftwareSettingsPreservation : 1;
uint16_t NCQAutosense : 1;
uint16_t DEVSLP : 1;
uint16_t HybridInformation : 1;
uint16_t Reserved1 : 6;
} SerialAtaFeaturesSupported;
struct {
uint16_t Reserved0 : 1;
uint16_t NonZeroOffsets : 1;
uint16_t DmaSetupAutoActivate : 1;
uint16_t DIPM : 1;
uint16_t InOrderData : 1;
uint16_t HardwareFeatureControl : 1;
uint16_t SoftwareSettingsPreservation : 1;
uint16_t DeviceAutoPS : 1;
uint16_t DEVSLP : 1;
uint16_t HybridInformation : 1;
uint16_t Reserved1 : 6;
} SerialAtaFeaturesEnabled;
uint16_t MajorRevision;
uint16_t MinorRevision;
struct {
uint16_t SmartCommands : 1;
uint16_t SecurityMode : 1;
uint16_t RemovableMediaFeature : 1;
uint16_t PowerManagement : 1;
uint16_t Reserved1 : 1;
uint16_t WriteCache : 1;
uint16_t LookAhead : 1;
uint16_t ReleaseInterrupt : 1;
uint16_t ServiceInterrupt : 1;
uint16_t DeviceReset : 1;
uint16_t HostProtectedArea : 1;
uint16_t Obsolete1 : 1;
uint16_t WriteBuffer : 1;
uint16_t ReadBuffer : 1;
uint16_t Nop : 1;
uint16_t Obsolete2 : 1;
uint16_t DownloadMicrocode : 1;
uint16_t DmaQueued : 1;
uint16_t Cfa : 1;
uint16_t AdvancedPm : 1;
uint16_t Msn : 1;
uint16_t PowerUpInStandby : 1;
uint16_t ManualPowerUp : 1;
uint16_t Reserved2 : 1;
uint16_t SetMax : 1;
uint16_t Acoustics : 1;
uint16_t BigLba : 1;
uint16_t DeviceConfigOverlay : 1;
uint16_t FlushCache : 1;
uint16_t FlushCacheExt : 1;
uint16_t WordValid83 : 2;
uint16_t SmartErrorLog : 1;
uint16_t SmartSelfTest : 1;
uint16_t MediaSerialNumber : 1;
uint16_t MediaCardPassThrough : 1;
uint16_t StreamingFeature : 1;
uint16_t GpLogging : 1;
uint16_t WriteFua : 1;
uint16_t WriteQueuedFua : 1;
uint16_t WWN64Bit : 1;
uint16_t URGReadStream : 1;
uint16_t URGWriteStream : 1;
uint16_t ReservedForTechReport : 2;
uint16_t IdleWithUnloadFeature : 1;
uint16_t WordValid : 2;
} CommandSetSupport;
struct {
uint16_t SmartCommands : 1;
uint16_t SecurityMode : 1;
uint16_t RemovableMediaFeature : 1;
uint16_t PowerManagement : 1;
uint16_t Reserved1 : 1;
uint16_t WriteCache : 1;
uint16_t LookAhead : 1;
uint16_t ReleaseInterrupt : 1;
uint16_t ServiceInterrupt : 1;
uint16_t DeviceReset : 1;
uint16_t HostProtectedArea : 1;
uint16_t Obsolete1 : 1;
uint16_t WriteBuffer : 1;
uint16_t ReadBuffer : 1;
uint16_t Nop : 1;
uint16_t Obsolete2 : 1;
uint16_t DownloadMicrocode : 1;
uint16_t DmaQueued : 1;
uint16_t Cfa : 1;
uint16_t AdvancedPm : 1;
uint16_t Msn : 1;
uint16_t PowerUpInStandby : 1;
uint16_t ManualPowerUp : 1;
uint16_t Reserved2 : 1;
uint16_t SetMax : 1;
uint16_t Acoustics : 1;
uint16_t BigLba : 1;
uint16_t DeviceConfigOverlay : 1;
uint16_t FlushCache : 1;
uint16_t FlushCacheExt : 1;
uint16_t Resrved3 : 1;
uint16_t Words119_120Valid : 1;
uint16_t SmartErrorLog : 1;
uint16_t SmartSelfTest : 1;
uint16_t MediaSerialNumber : 1;
uint16_t MediaCardPassThrough : 1;
uint16_t StreamingFeature : 1;
uint16_t GpLogging : 1;
uint16_t WriteFua : 1;
uint16_t WriteQueuedFua : 1;
uint16_t WWN64Bit : 1;
uint16_t URGReadStream : 1;
uint16_t URGWriteStream : 1;
uint16_t ReservedForTechReport : 2;
uint16_t IdleWithUnloadFeature : 1;
uint16_t Reserved4 : 2;
} CommandSetActive;
uint16_t UltraDMASupport : 8;
uint16_t UltraDMAActive : 8;
struct {
uint16_t TimeRequired : 15;
uint16_t ExtendedTimeReported : 1;
} NormalSecurityEraseUnit;
struct {
uint16_t TimeRequired : 15;
uint16_t ExtendedTimeReported : 1;
} EnhancedSecurityEraseUnit;
uint16_t CurrentAPMLevel : 8;
uint16_t ReservedWord91 : 8;
uint16_t MasterPasswordID;
uint16_t HardwareResetResult;
uint16_t CurrentAcousticValue : 8;
uint16_t RecommendedAcousticValue : 8;
uint16_t StreamMinRequestSize;
uint16_t StreamingTransferTimeDMA;
uint16_t StreamingAccessLatencyDMAPIO;
uint32_t StreamingPerfGranularity;
uint32_t Max48BitLBA[2];
uint16_t StreamingTransferTime;
uint16_t DsmCap;
struct {
uint16_t LogicalSectorsPerPhysicalSector : 4;
uint16_t Reserved0 : 8;
uint16_t LogicalSectorLongerThan256Words : 1;
uint16_t MultipleLogicalSectorsPerPhysicalSector : 1;
uint16_t Reserved1 : 2;
} PhysicalLogicalSectorSize;
uint16_t InterSeekDelay;
uint16_t WorldWideName[4];
uint16_t ReservedForWorldWideName128[4];
uint16_t ReservedForTlcTechnicalReport;
uint16_t WordsPerLogicalSector[2];
struct {
uint16_t ReservedForDrqTechnicalReport : 1;
uint16_t WriteReadVerify : 1;
uint16_t WriteUncorrectableExt : 1;
uint16_t ReadWriteLogDmaExt : 1;
uint16_t DownloadMicrocodeMode3 : 1;
uint16_t FreefallControl : 1;
uint16_t SenseDataReporting : 1;
uint16_t ExtendedPowerConditions : 1;
uint16_t Reserved0 : 6;
uint16_t WordValid : 2;
} CommandSetSupportExt;
struct {
uint16_t ReservedForDrqTechnicalReport : 1;
uint16_t WriteReadVerify : 1;
uint16_t WriteUncorrectableExt : 1;
uint16_t ReadWriteLogDmaExt : 1;
uint16_t DownloadMicrocodeMode3 : 1;
uint16_t FreefallControl : 1;
uint16_t SenseDataReporting : 1;
uint16_t ExtendedPowerConditions : 1;
uint16_t Reserved0 : 6;
uint16_t Reserved1 : 2;
} CommandSetActiveExt;
uint16_t ReservedForExpandedSupportandActive[6];
uint16_t MsnSupport : 2;
uint16_t ReservedWord127 : 14;
struct {
uint16_t SecuritySupported : 1;
uint16_t SecurityEnabled : 1;
uint16_t SecurityLocked : 1;
uint16_t SecurityFrozen : 1;
uint16_t SecurityCountExpired : 1;
uint16_t EnhancedSecurityEraseSupported : 1;
uint16_t Reserved0 : 2;
uint16_t SecurityLevel : 1;
uint16_t Reserved1 : 7;
} SecurityStatus;
uint16_t ReservedWord129[31];
struct {
uint16_t MaximumCurrentInMA : 12;
uint16_t CfaPowerMode1Disabled : 1;
uint16_t CfaPowerMode1Required : 1;
uint16_t Reserved0 : 1;
uint16_t Word160Supported : 1;
} CfaPowerMode1;
uint16_t ReservedForCfaWord161[7];
uint16_t NominalFormFactor : 4;
uint16_t ReservedWord168 : 12;
struct {
uint16_t SupportsTrim : 1;
uint16_t Reserved0 : 15;
} DataSetManagementFeature;
uint16_t AdditionalProductID[4];
uint16_t ReservedForCfaWord174[2];
uint16_t CurrentMediaSerialNumber[30];
struct {
uint16_t Supported : 1;
uint16_t Reserved0 : 1;
uint16_t WriteSameSuported : 1;
uint16_t ErrorRecoveryControlSupported : 1;
uint16_t FeatureControlSuported : 1;
uint16_t DataTablesSuported : 1;
uint16_t Reserved1 : 6;
uint16_t VendorSpecific : 4;
} SCTCommandTransport;
uint16_t ReservedWord207[2];
struct {
uint16_t AlignmentOfLogicalWithinPhysical : 14;
uint16_t Word209Supported : 1;
uint16_t Reserved0 : 1;
} BlockAlignment;
uint16_t WriteReadVerifySectorCountMode3Only[2];
uint16_t WriteReadVerifySectorCountMode2Only[2];
struct {
uint16_t NVCachePowerModeEnabled : 1;
uint16_t Reserved0 : 3;
uint16_t NVCacheFeatureSetEnabled : 1;
uint16_t Reserved1 : 3;
uint16_t NVCachePowerModeVersion : 4;
uint16_t NVCacheFeatureSetVersion : 4;
} NVCacheCapabilities;
uint16_t NVCacheSizeLSW;
uint16_t NVCacheSizeMSW;
uint16_t NominalMediaRotationRate;
uint16_t ReservedWord218;
struct {
uint8_t NVCacheEstimatedTimeToSpinUpInSeconds;
uint8_t Reserved;
} NVCacheOptions;
uint16_t WriteReadVerifySectorCountMode : 8;
uint16_t ReservedWord220 : 8;
uint16_t ReservedWord221;
struct {
uint16_t MajorVersion : 12;
uint16_t TransportType : 4;
} TransportMajorVersion;
uint16_t TransportMinorVersion;
uint16_t ReservedWord224[6];
uint32_t ExtendedNumberOfUserAddressableSectors[2];
uint16_t MinBlocksPerDownloadMicrocodeMode03;
uint16_t MaxBlocksPerDownloadMicrocodeMode03;
uint16_t ReservedWord236[19];
uint16_t Signature : 8;
uint16_t CheckSum : 8;
} __attribute__((packed));
struct part_table_entry{
uint32_t status:8;
uint32_t head_start:8;
uint32_t sector_start:6;
uint32_t cyl_start:10;
uint32_t type:8;
uint32_t head_end:8;
uint32_t sector_end:6;
uint32_t cyl_end:10;
uint32_t lba;
uint32_t size;
} __attribute__((packed));
static struct ata_controller controllers[MAX_ATA_CONTROLLER] = {{
.id = 0,
.base = 0x1F0,
.dev_ctl = 0x3F6,
.present = 0,
.last_device_used = -1,
},
{
.id = 1,
.base = 0x170,
.dev_ctl = 0x376,
.present = 0,
.last_device_used = -1,
}};
int ATADetectDevice(struct ata_device *dev)
{
struct ata_controller *ctl = dev->ctl;
outb(ctl->base + ATA_PIO_DRIVE,
ATA_PIO_DRIVE_IBM | dev->isSlave ? ATA_PIO_DRIVE_SLAVE : ATA_PIO_DRIVE_MASTER);
unsigned st = inb(ctl->base + ATA_PIO_STATUS);
if (st & ATA_PIO_STATUS_DRIVE_BUSY)
goto no_disk;
unsigned cl = inb(ctl->base + ATA_PIO_LBAMID); /* get the "signature bytes" */
unsigned ch = inb(ctl->base + ATA_PIO_LBAHI);
/* differentiate ATA, ATAPI, SATA and SATAPI */
if (cl == 0x14 && ch == 0xEB) {
return ATA_DEV_PATAPI;
}
if (cl == 0x69 && ch == 0x96) {
return ATA_DEV_SATAPI;
}
if (cl == 0 && ch == 0) {
return ATA_DEV_PATA;
}
if (cl == 0x3c && ch == 0xc3) {
return ATA_DEV_SATA;
}
no_disk:
return ATA_DEV_UNKNOWN;
}
int ATAGetDeviceInfo(struct ata_device *dev)
{
int status;
int16_t buffer[256];
struct ata_controller *ctl = dev->ctl;
struct _IDENTIFY_DEVICE_DATA *deviceInfo;
outb(ctl->base + ATA_PIO_DRIVE,
ATA_PIO_DRIVE_IBM | (dev->isSlave ? ATA_PIO_DRIVE_SLAVE : ATA_PIO_DRIVE_MASTER));
outb(ctl->base + ATA_PIO_CMD, ATA_PIO_CMD_IDENTIFY);
/* Wait for command completion (wait while busy bit is set) */
for (int timeout = 0; timeout < 30000; timeout++) {
status = inb(ctl->base + ATA_PIO_STATUS);
if (!(status & ATA_PIO_STATUS_DRIVE_BUSY))
break;
}
/* DRQ bit indicates that data is ready to be read. If it is not set
after an IDENTIFY command, there is a problem */
if (!(status & ATA_PIO_STATUS_DRQ)) {
return -1;
}
/* Read data from the controller buffer to a temporary buffer */
for (int i = 0; i < 256; i++)
buffer[i] = inw(ctl->base + ATA_PIO_DATA);
deviceInfo = (struct _IDENTIFY_DEVICE_DATA *)buffer;
dev->heads = deviceInfo->NumHeads;
dev->cyls = deviceInfo->NumCylinders;
dev->sectors = deviceInfo->NumSectorsPerTrack;
printf("Disk Detected[%d][%d]: %d Ko\n", ctl->id, dev->id,
(dev->heads * dev->cyls * dev->sectors * DISK_SECTOR_SIZE) / 1024);
ATAReadPartition(dev);
return 0;
}
const char *partTypeToStr(unsigned int type)
{
switch (type) {
case PART_TYPE_EXTENDED:
return "Extended";
case PART_TYPE_FAT16:
case PART_TYPE_FAT16_LBA:
return "FAT16";
case PART_TYPE_FAT32:
case PART_TYPE_FAT32_LBA:
return "FAT32";
case PART_TYPE_LINUX_SWAP:
return "Linux Swap";
case PART_TYPE_LINUX:
return "Linux";
default:
return "Unknown";
}
}
struct ata_partition *ATAGetPartition(int id)
{
struct ata_partition *part;
int count;
list_foreach(partitions, part, count)
{
if (part->id == id)
return part;
}
return NULL;
}
struct ata_partition *ATAPartitionCreate(uint type, uint size, uint32_t lba,
struct ata_device *dev)
{
struct ata_partition *part =
(struct ata_partition *)malloc(sizeof(struct ata_partition));
if (part == NULL)
goto err;
part->id = nextPartitionId++;
part->type = type;
part->size = size;
part->lba = lba;
part->device = dev;
uint32_t flags;
disable_IRQs(flags);
list_add_tail(partitions, part);
restore_IRQs(flags);
err:
return part;
}
int ATAReadPartition(struct ata_device *dev)
{
char buf[DISK_SECTOR_SIZE];
int ret = ATAReadSector(dev, 0, 1, buf);
if (ret)
return ret;
struct part_table_entry *parts = (struct part_table_entry *)(buf + PART_TABLE_OFFSET);
for (int i = 0; i < 4; i++) {
if (parts[i].size == 0)
continue;
if (parts[i].type == PART_TYPE_EXTENDED) {
printf("Unsupported Partition extended\n");
continue;
}
printf("Got partition %d type %s(0x%x) size %d kb lba 0x%x\n", i,
partTypeToStr(parts[i].type), parts[i].type, (parts[i].size * DISK_SECTOR_SIZE) >> 10, parts[i].lba);
ATAPartitionCreate(parts[i].type, parts[i].size, parts[i].lba, dev);
ret++;
}
return ret;
}
int ATADetectController(struct ata_controller *controller)
{
mutexInit(&controller[0].mutex);
mutexInit(&controller[1].mutex);
controller->devices[0].id = 0;
controller->devices[0].isSlave = 0;
controller->devices[0].ctl = controller;
controller->devices[0].type = ATADetectDevice(&controllers->devices[0]);
if (controller->devices[0].type == ATA_DEV_PATA ||
controller->devices[0].type == ATA_DEV_SATA) {
ATAGetDeviceInfo(&controller->devices[0]);
}
controller->devices[1].id = 1;
controller->devices[1].isSlave = 1;
controller->devices[1].ctl = controller;
controller->devices[1].type = ATADetectDevice(&controllers->devices[1]);
if (controller->devices[1].type == ATA_DEV_PATA ||
controller->devices[1].type == ATA_DEV_SATA) {
ATAGetDeviceInfo(&controller->devices[1]);
}
return 0;
}
int ATAInit()
{
list_init(partitions);
for (uint i = 0; i < MAX_ATA_CONTROLLER; i++) {
ATADetectController(&controllers[i]);
}
return 0;
}
int ATAReadPartitionSector(struct ata_partition *part, int offset, uint nbSector, void *buf)
{
int lba = part->lba + offset;
return ATAReadSector(part->device, lba, nbSector, buf);
}
int ATAReadSector(struct ata_device *dev, int lba, uint nb_sector, void *buf)
{
struct ata_controller *ctl = dev->ctl;
mutexLock(&ctl->mutex);
if (ctl->last_device_used != dev->id) {
outb(ctl->base + ATA_PIO_DRIVE, ATA_PIO_DRIVE_IBM | dev->isSlave << 4);
while (inb(ctl->base + ATA_PIO_STATUS) & ATA_PIO_STATUS_DRIVE_BUSY) {
}
ctl->last_device_used = dev->id;
}
outb(ctl->base + ATA_PIO_DRIVE, lba >> 24 | ATA_PIO_DRIVE_IBM | ATA_PIO_DRIVE_LBA);
outb(ctl->base + ATA_PIO_SEC_COUNT, nb_sector);
outb(ctl->base + ATA_PIO_LBALO, lba & 0xff);
outb(ctl->base + ATA_PIO_LBAMID, (lba >> 8) & 0xff);
outb(ctl->base + ATA_PIO_LBAHI, (lba >> 16) & 0xff);
outb(ctl->base + ATA_PIO_CMD, ATA_PIO_CMD_READ);
uint16_t *ptr = (uint16_t *)buf;
for (uint sector = 0; sector < nb_sector; sector++) {
while (inb(ctl->base + ATA_PIO_STATUS) & ATA_PIO_STATUS_DRIVE_BUSY) {
}
if (inb(ctl->base + ATA_PIO_STATUS) & ATA_PIO_STATUS_REG_ERR) {
mutexUnlock(&ctl->mutex);
printf("ATA read error at sector %d\n", sector);
return -1;
}
for (uint i = 0; i < (DISK_SECTOR_SIZE / sizeof(uint16_t)); i++) {
*ptr = inw(ctl->base + ATA_PIO_DATA);
ptr++;
}
}
mutexUnlock(&ctl->mutex);
return 0;
}
int ATAWriteSector(struct ata_device *dev, int lba, uint nb_sector, void *buf)
{
struct ata_controller *ctl = dev->ctl;
int ret = 0;
mutexLock(&ctl->mutex);
if (ctl->last_device_used != dev->id) {
outb(ctl->base + ATA_PIO_DRIVE, ATA_PIO_DRIVE_IBM | dev->isSlave << 4);
while (inb(ctl->base + ATA_PIO_STATUS) & ATA_PIO_STATUS_DRIVE_BUSY) {
}
ctl->last_device_used = dev->id;
}
outb(ctl->base + ATA_PIO_DRIVE, lba >> 24 | ATA_PIO_DRIVE_IBM | ATA_PIO_DRIVE_LBA);
outb(ctl->base + ATA_PIO_SEC_COUNT, nb_sector);
outb(ctl->base + ATA_PIO_LBALO, lba & 0xff);
outb(ctl->base + ATA_PIO_LBAMID, (lba >> 8) & 0xff);
outb(ctl->base + ATA_PIO_LBAHI, (lba >> 16) & 0xff);
outb(ctl->base + ATA_PIO_CMD, ATA_PIO_CMD_WRITE);
uint16_t *ptr = (uint16_t *)buf;
for (uint sector = 0; sector < nb_sector; sector++) {
while (inb(ctl->base + ATA_PIO_STATUS) & ATA_PIO_STATUS_DRIVE_BUSY) {
}
if (inb(ctl->base + ATA_PIO_STATUS) & ATA_PIO_STATUS_REG_ERR) {
mutexUnlock(&ctl->mutex);
printf("ATA write error\n");
return -1;
}
int retry = 100;
while (retry) {
int status = inb(ctl->base + ATA_PIO_STATUS);
if (status & ATA_PIO_STATUS_REG_ERR) {
mutexUnlock(&ctl->mutex);
printf("ATA write error\n");
return -1;
}
if ((status & ATA_PIO_STATUS_DRQ) &&
!(status & ATA_PIO_STATUS_DRIVE_BUSY))
break;
retry--;
}
if(retry == 0){
printf("ATA write timeout error\n");
ret=-1;
break;
}
for (uint i = 0; i < (DISK_SECTOR_SIZE / sizeof(uint16_t)); i++) {
outw(ctl->base + ATA_PIO_DATA, *ptr++);
}
retry = 1000;
// Wait for the device to receive the data
while (retry) {
int status = inb(ctl->base + ATA_PIO_STATUS);
if (status & ATA_PIO_STATUS_REG_ERR) {
mutexUnlock(&ctl->mutex);
printf("ATA write error\n");
return -1;
}
if (!(status & ATA_PIO_STATUS_DRQ) &&
!(status & ATA_PIO_STATUS_DRIVE_BUSY))
break;
retry --;
}
if(retry == 0){
printf("ATA write data timeout error\n");
ret=-1;
break;
}
}
mutexUnlock(&ctl->mutex);
return ret;
}
struct ata_device *ATAGetDevice(int ctlId, int devId)
{
if (ctlId >= MAX_ATA_CONTROLLER)
return NULL;
if (devId >= MAX_ATA_DEVICES)
return NULL;
return &controllers[ctlId].devices[devId];
}
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