218 lines
9.8 KiB
C
218 lines
9.8 KiB
C
#include <minix/drivers.h>
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#include <minix/driver.h>
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#include <minix/drvlib.h>
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#define VERBOSE 0 /* display identify messages during boot */
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#define ENABLE_ATAPI 1 /* add ATAPI cd-rom support to driver */
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#define ATAPI_DEBUG 0 /* To debug ATAPI code. */
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/* I/O Ports used by winchester disk controllers. */
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/* Read and write registers */
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#define REG_CMD_BASE0 0x1F0 /* command base register of controller 0 */
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#define REG_CMD_BASE1 0x170 /* command base register of controller 1 */
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#define REG_CTL_BASE0 0x3F6 /* control base register of controller 0 */
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#define REG_CTL_BASE1 0x376 /* control base register of controller 1 */
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#define PCI_CTL_OFF 2 /* Offset of control registers from BAR2 */
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#define PCI_DMA_2ND_OFF 8 /* Offset of DMA registers from BAR4 for
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* secondary channel
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*/
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#define REG_DATA 0 /* data register (offset from the base reg.) */
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#define REG_PRECOMP 1 /* start of write precompensation */
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#define REG_COUNT 2 /* sectors to transfer */
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#define REG_SECTOR 3 /* sector number */
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#define REG_CYL_LO 4 /* low byte of cylinder number */
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#define REG_CYL_HI 5 /* high byte of cylinder number */
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#define REG_LDH 6 /* lba, drive and head */
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#define LDH_DEFAULT 0xA0 /* ECC enable, 512 bytes per sector */
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#define LDH_LBA 0x40 /* Use LBA addressing */
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#define LDH_DEV 0x10 /* Drive 1 iff set */
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#define ldh_init(drive) (LDH_DEFAULT | ((drive) << 4))
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/* Read only registers */
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#define REG_STATUS 7 /* status */
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#define STATUS_BSY 0x80 /* controller busy */
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#define STATUS_RDY 0x40 /* drive ready */
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#define STATUS_WF 0x20 /* write fault */
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#define STATUS_SC 0x10 /* seek complete (obsolete) */
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#define STATUS_DRQ 0x08 /* data transfer request */
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#define STATUS_CRD 0x04 /* corrected data */
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#define STATUS_IDX 0x02 /* index pulse */
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#define STATUS_ERR 0x01 /* error */
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#define STATUS_ADMBSY 0x100 /* administratively busy (software) */
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#define REG_ERROR 1 /* error code */
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#define ERROR_BB 0x80 /* bad block */
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#define ERROR_ECC 0x40 /* bad ecc bytes */
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#define ERROR_ID 0x10 /* id not found */
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#define ERROR_AC 0x04 /* aborted command */
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#define ERROR_TK 0x02 /* track zero error */
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#define ERROR_DM 0x01 /* no data address mark */
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/* Write only registers */
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#define REG_COMMAND 7 /* command */
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#define CMD_IDLE 0x00 /* for w_command: drive idle */
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#define CMD_RECALIBRATE 0x10 /* recalibrate drive */
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#define CMD_READ 0x20 /* read data */
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#define CMD_READ_EXT 0x24 /* read data (LBA48 addressed) */
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#define CMD_READ_DMA_EXT 0x25 /* read data using DMA (w/ LBA48) */
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#define CMD_WRITE 0x30 /* write data */
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#define CMD_WRITE_EXT 0x34 /* write data (LBA48 addressed) */
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#define CMD_WRITE_DMA_EXT 0x35 /* write data using DMA (w/ LBA48) */
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#define CMD_READVERIFY 0x40 /* read verify */
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#define CMD_FORMAT 0x50 /* format track */
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#define CMD_SEEK 0x70 /* seek cylinder */
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#define CMD_DIAG 0x90 /* execute device diagnostics */
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#define CMD_SPECIFY 0x91 /* specify parameters */
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#define CMD_READ_DMA 0xC8 /* read data using DMA */
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#define CMD_WRITE_DMA 0xCA /* write data using DMA */
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#define ATA_IDENTIFY 0xEC /* identify drive */
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/* #define REG_CTL 0x206 */ /* control register */
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#define REG_CTL 0 /* control register */
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#define CTL_NORETRY 0x80 /* disable access retry */
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#define CTL_NOECC 0x40 /* disable ecc retry */
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#define CTL_EIGHTHEADS 0x08 /* more than eight heads */
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#define CTL_RESET 0x04 /* reset controller */
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#define CTL_INTDISABLE 0x02 /* disable interrupts */
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#define REG_CTL_ALTSTAT 0 /* alternate status register */
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/* Identify words */
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#define ID_GENERAL 0x00 /* General configuration information */
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#define ID_GEN_NOT_ATA 0x8000 /* Not an ATA device */
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#define ID_CAPABILITIES 0x31 /* Capabilities (49)*/
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#define ID_CAP_LBA 0x0200 /* LBA supported */
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#define ID_CAP_DMA 0x0100 /* DMA supported */
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#define ID_FIELD_VALIDITY 0x35 /* Field Validity (53) */
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#define ID_FV_88 0x04 /* Word 88 is valid (UDMA) */
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#define ID_MULTIWORD_DMA 0x3f /* Multiword DMA (63) */
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#define ID_MWDMA_2_SEL 0x0400 /* Mode 2 is selected */
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#define ID_MWDMA_1_SEL 0x0200 /* Mode 1 is selected */
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#define ID_MWDMA_0_SEL 0x0100 /* Mode 0 is selected */
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#define ID_MWDMA_2_SUP 0x0004 /* Mode 2 is supported */
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#define ID_MWDMA_1_SUP 0x0002 /* Mode 1 is supported */
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#define ID_MWDMA_0_SUP 0x0001 /* Mode 0 is supported */
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#define ID_CSS 0x53 /* Command Sets Supported (83) */
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#define ID_CSS_LBA48 0x0400
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#define ID_ULTRA_DMA 0x58 /* Ultra DMA (88) */
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#define ID_UDMA_5_SEL 0x2000 /* Mode 5 is selected */
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#define ID_UDMA_4_SEL 0x1000 /* Mode 4 is selected */
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#define ID_UDMA_3_SEL 0x0800 /* Mode 3 is selected */
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#define ID_UDMA_2_SEL 0x0400 /* Mode 2 is selected */
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#define ID_UDMA_1_SEL 0x0200 /* Mode 1 is selected */
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#define ID_UDMA_0_SEL 0x0100 /* Mode 0 is selected */
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#define ID_UDMA_5_SUP 0x0020 /* Mode 5 is supported */
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#define ID_UDMA_4_SUP 0x0010 /* Mode 4 is supported */
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#define ID_UDMA_3_SUP 0x0008 /* Mode 3 is supported */
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#define ID_UDMA_2_SUP 0x0004 /* Mode 2 is supported */
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#define ID_UDMA_1_SUP 0x0002 /* Mode 1 is supported */
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#define ID_UDMA_0_SUP 0x0001 /* Mode 0 is supported */
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/* DMA registers */
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#define DMA_COMMAND 0 /* Command register */
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#define DMA_CMD_WRITE 0x08 /* PCI bus master writes */
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#define DMA_CMD_START 0x01 /* Start Bus Master */
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#define DMA_STATUS 2 /* Status register */
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#define DMA_ST_D1_DMACAP 0x40 /* Drive 1 is DMA capable */
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#define DMA_ST_D0_DMACAP 0x20 /* Drive 0 is DMA capable */
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#define DMA_ST_INT 0x04 /* Interrupt */
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#define DMA_ST_ERROR 0x02 /* Error */
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#define DMA_ST_BM_ACTIVE 0x01 /* Bus Master IDE Active */
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#define DMA_PRDTP 4 /* PRD Table Pointer */
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/* Check for the presence of LBA48 only on drives that are 'big'. */
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#define LBA48_CHECK_SIZE 0x0f000000
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#define LBA_MAX_SIZE 0x0fffffff /* Highest sector size for
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* regular LBA.
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*/
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#if ENABLE_ATAPI
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#define ERROR_SENSE 0xF0 /* sense key mask */
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#define SENSE_NONE 0x00 /* no sense key */
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#define SENSE_RECERR 0x10 /* recovered error */
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#define SENSE_NOTRDY 0x20 /* not ready */
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#define SENSE_MEDERR 0x30 /* medium error */
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#define SENSE_HRDERR 0x40 /* hardware error */
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#define SENSE_ILRQST 0x50 /* illegal request */
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#define SENSE_UATTN 0x60 /* unit attention */
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#define SENSE_DPROT 0x70 /* data protect */
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#define SENSE_ABRT 0xb0 /* aborted command */
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#define SENSE_MISCOM 0xe0 /* miscompare */
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#define ERROR_MCR 0x08 /* media change requested */
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#define ERROR_ABRT 0x04 /* aborted command */
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#define ERROR_EOM 0x02 /* end of media detected */
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#define ERROR_ILI 0x01 /* illegal length indication */
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#define REG_FEAT 1 /* features */
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#define FEAT_OVERLAP 0x02 /* overlap */
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#define FEAT_DMA 0x01 /* dma */
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#define REG_IRR 2 /* interrupt reason register */
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#define IRR_REL 0x04 /* release */
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#define IRR_IO 0x02 /* direction for xfer */
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#define IRR_COD 0x01 /* command or data */
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#define REG_SAMTAG 3
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#define REG_CNT_LO 4 /* low byte of cylinder number */
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#define REG_CNT_HI 5 /* high byte of cylinder number */
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#define REG_DRIVE 6 /* drive select */
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#endif
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#define REG_STATUS 7 /* status */
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#define STATUS_BSY 0x80 /* controller busy */
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#define STATUS_DRDY 0x40 /* drive ready */
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#define STATUS_DMADF 0x20 /* dma ready/drive fault */
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#define STATUS_SRVCDSC 0x10 /* service or dsc */
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#define STATUS_DRQ 0x08 /* data transfer request */
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#define STATUS_CORR 0x04 /* correctable error occurred */
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#define STATUS_CHECK 0x01 /* check error */
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#if ENABLE_ATAPI
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#define ATAPI_PACKETCMD 0xA0 /* packet command */
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#define ATAPI_IDENTIFY 0xA1 /* identify drive */
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#define SCSI_READ10 0x28 /* read from disk */
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#define SCSI_SENSE 0x03 /* sense request */
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#endif /* ATAPI */
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/* Interrupt request lines. */
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#define NO_IRQ 0 /* no IRQ set yet */
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#define ATAPI_PACKETSIZE 12
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#define SENSE_PACKETSIZE 18
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/* Error codes */
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#define ERR (-1) /* general error */
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#define ERR_BAD_SECTOR (-2) /* block marked bad detected */
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/* Some controllers don't interrupt, the clock will wake us up. */
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#define WAKEUP_SECS 32 /* drive may be out for 31 seconds max */
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#define WAKEUP_TICKS (WAKEUP_SECS*system_hz)
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/* Miscellaneous. */
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#define MAX_DRIVES 8
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#define COMPAT_DRIVES 4
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#if _WORD_SIZE > 2
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#define MAX_SECS 256 /* controller can transfer this many sectors */
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#else
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#define MAX_SECS 127 /* but not to a 16 bit process */
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#endif
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#define MAX_ERRORS 4 /* how often to try rd/wt before quitting */
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#define NR_MINORS (MAX_DRIVES * DEV_PER_DRIVE)
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#define SUB_PER_DRIVE (NR_PARTITIONS * NR_PARTITIONS)
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#define NR_SUBDEVS (MAX_DRIVES * SUB_PER_DRIVE)
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#define DELAY_USECS 1000 /* controller timeout in microseconds */
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#define DELAY_TICKS 1 /* controller timeout in ticks */
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#define DEF_TIMEOUT_TICKS 300 /* controller timeout in ticks */
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#define RECOVERY_USECS 500000 /* controller recovery time in microseconds */
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#define RECOVERY_TICKS 30 /* controller recovery time in ticks */
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#define INITIALIZED 0x01 /* drive is initialized */
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#define DEAF 0x02 /* controller must be reset */
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#define SMART 0x04 /* drive supports ATA commands */
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#if ENABLE_ATAPI
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#define ATAPI 0x08 /* it is an ATAPI device */
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#else
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#define ATAPI 0 /* don't bother with ATAPI; optimise out */
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#endif
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#define IDENTIFIED 0x10 /* w_identify done successfully */
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#define IGNORING 0x20 /* w_identify failed once */
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#define NO_DMA_VAR "ata_no_dma"
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