a09bee1aa8
or unsigned int (this doesn't change the struct layout, size or alignment in any of the files changed in this commit, at least for gcc on i386's. Using bitfields of type u_char may affect size and alignment but not packing)).
303 lines
14 KiB
C
303 lines
14 KiB
C
/*
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* Device-independent level for ATAPI drivers.
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*
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* Copyright (C) 1995 Cronyx Ltd.
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* Author Serge Vakulenko, <vak@cronyx.ru>
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*
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* This software is distributed with NO WARRANTIES, not even the implied
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* warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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* Authors grant any other persons or organizations permission to use
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* or modify this software as long as this message is kept with the software,
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* all derivative works or modified versions.
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*
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* Version 1.9, Thu Oct 12 15:53:50 MSK 1995
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*/
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/*
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* Disk Controller ATAPI register definitions.
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*/
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#ifdef PC98
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#define AR_DATA 0x0 /* RW - data register (16 bits) */
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#define AR_ERROR 0x2 /* R - error register */
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#define AR_FEATURES 0x2 /* W - features */
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#define AR_IREASON 0x4 /* RW - interrupt reason */
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#define AR_TAG 0x6 /* - reserved for SAM TAG byte */
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#define AR_CNTLO 0x8 /* RW - byte count, low byte */
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#define AR_CNTHI 0xa /* RW - byte count, high byte */
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#define AR_DRIVE 0xc /* RW - drive select */
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#define AR_COMMAND 0xe /* W - command register */
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#define AR_STATUS 0xe /* R - immediate status */
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#else
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#define AR_DATA 0x0 /* RW - data register (16 bits) */
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#define AR_ERROR 0x1 /* R - error register */
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#define AR_FEATURES 0x1 /* W - features */
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#define AR_IREASON 0x2 /* RW - interrupt reason */
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#define AR_TAG 0x3 /* - reserved for SAM TAG byte */
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#define AR_CNTLO 0x4 /* RW - byte count, low byte */
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#define AR_CNTHI 0x5 /* RW - byte count, high byte */
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#define AR_DRIVE 0x6 /* RW - drive select */
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#define AR_COMMAND 0x7 /* W - command register */
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#define AR_STATUS 0x7 /* R - immediate status */
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#endif
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/*
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* Status register bits
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*/
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#define ARS_CHECK 0x01 /* error occured, see sense key/code */
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/* bit 0x02 reserved */
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#define ARS_CORR 0x04 /* correctable error occured */
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#define ARS_DRQ 0x08 /* data request / ireason valid */
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#define ARS_DSC 0x10 /* immediate operation completed */
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#define ARS_DF 0x20 /* drive fault */
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#define ARS_DRDY 0x40 /* ready to get command */
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#define ARS_BSY 0x80 /* registers busy */
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/* for overlap mode only: */
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#define ARS_SERVICE 0x10 /* service is requested */
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#define ARS_DMARDY 0x20 /* ready to start a DMA transfer */
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#define ARS_BITS "\20\010busy\7ready\6fault\5opdone\4drq\3corr\1check"
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/*
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* Error register bits
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*/
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#define AER_ILI 0x01 /* illegal length indication */
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#define AER_EOM 0x02 /* end of media detected */
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#define AER_ABRT 0x04 /* command aborted */
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#define AER_MCR 0x08 /* media change requested */
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#define AER_SKEY 0xf0 /* sense key mask */
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#define AER_SK_NO_SENSE 0x00 /* no specific sense key info */
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#define AER_SK_RECOVERED_ERROR 0x10 /* command succeeded, data recovered */
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#define AER_SK_NOT_READY 0x20 /* no access to drive */
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#define AER_SK_MEDIUM_ERROR 0x30 /* non-recovered data error */
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#define AER_SK_HARDWARE_ERROR 0x40 /* non-recoverable hardware failure */
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#define AER_SK_ILLEGAL_REQUEST 0x50 /* invalid command parameter(s) */
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#define AER_SK_UNIT_ATTENTION 0x60 /* media changed */
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#define AER_SK_DATA_PROTECT 0x70 /* reading read-protected sector */
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#define AER_SK_BLANK_CHECK 0x80 /* blank check */
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#define AER_SK_VENDOR_SPECIFIC 0x90 /* vendor specific skey */
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#define AER_SK_COPY_ABORTED 0xa0 /* copy aborted */
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#define AER_SK_ABORTED_COMMAND 0xb0 /* command aborted, try again */
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#define AER_SK_EQUAL 0xc0 /* equal */
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#define AER_SK_VOLUME_OVERFLOW 0xd0 /* volume overflow */
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#define AER_SK_MISCOMPARE 0xe0 /* data did not match the medium */
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#define AER_SK_RESERVED 0xf0
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#define AER_BITS "\20\4mchg\3abort\2eom\1ili"
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/*
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* Feature register bits
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*/
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#define ARF_DMA 0x01 /* transfer data via DMA */
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#define ARF_OVERLAP 0x02 /* release the bus until completion */
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/*
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* Interrupt reason register bits
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*/
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#define ARI_CMD 0x01 /* command(1) or data(0) */
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#define ARI_IN 0x02 /* transfer to(1) or from(0) the host */
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#define ARI_RELEASE 0x04 /* bus released until completion */
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/*
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* Drive register values
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*/
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#define ARD_DRIVE0 0xa0 /* drive 0 selected */
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#define ARD_DRIVE1 0xb0 /* drive 1 selected */
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/*
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* ATA commands
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*/
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#define ATAPIC_IDENTIFY 0xa1 /* get drive parameters */
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#define ATAPIC_PACKET 0xa0 /* execute packet command */
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/*
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* Mandatory packet commands
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*/
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#define ATAPI_TEST_UNIT_READY 0x00 /* check if the device is ready */
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#define ATAPI_REQUEST_SENSE 0x03 /* get sense data */
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#define ATAPI_START_STOP 0x1b /* start/stop the media */
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#define ATAPI_PREVENT_ALLOW 0x1e /* prevent/allow media removal */
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#define ATAPI_READ_CAPACITY 0x25 /* get volume capacity */
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#define ATAPI_READ_BIG 0x28 /* read data */
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#define ATAPI_WRITE_BIG 0x2a /* write data */
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#define ATAPI_READ_TOC 0x43 /* get table of contents */
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#define ATAPI_READ_SUBCHANNEL 0x42 /* get subchannel info */
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#define ATAPI_MODE_SELECT_BIG 0x55 /* set device parameters */
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#define ATAPI_MODE_SENSE 0x5a /* get device parameters */
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#define ATAPI_PLAY_CD 0xb4 /* universal play command */
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#define ATAPI_MECH_STATUS 0xbd /* get changer mechanism status */
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#define ATAPI_LOAD_UNLOAD 0xa6 /* changer control command */
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/*
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* Optional packet commands
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*/
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#define ATAPI_PLAY_MSF 0x47 /* play by MSF address */
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#define ATAPI_PAUSE 0x4b /* stop/start audio operation */
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/*
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* Nonstandard packet commands
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*/
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#define ATAPI_PLAY_TRACK 0x48 /* play by track number */
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#define ATAPI_PLAY_BIG 0xa5 /* play by logical block address */
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#define DSC_POLL_INTERVAL 10
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/*
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* Drive parameter information
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*/
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struct atapi_params {
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unsigned cmdsz : 2; /* packet command size */
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#define AT_PSIZE_12 0 /* 12 bytes */
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#define AT_PSIZE_16 1 /* 16 bytes */
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unsigned : 3;
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unsigned drqtype : 2; /* DRQ type */
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#define AT_DRQT_MPROC 0 /* microprocessor DRQ - 3 msec delay */
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#define AT_DRQT_INTR 1 /* interrupt DRQ - 10 msec delay */
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#define AT_DRQT_ACCEL 2 /* accelerated DRQ - 50 usec delay */
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unsigned removable : 1; /* device is removable */
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unsigned devtype : 5; /* device type */
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#define AT_TYPE_DIRECT 0 /* direct-access (magnetic disk) */
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#define AT_TYPE_TAPE 1 /* streaming tape (QIC-121 model) */
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#define AT_TYPE_CDROM 5 /* CD-ROM device */
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#define AT_TYPE_OPTICAL 7 /* optical disk */
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unsigned : 1;
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unsigned proto : 2; /* command protocol */
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#define AT_PROTO_ATAPI 2
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short reserved1[9];
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char serial[20]; /* serial number - optional */
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short reserved2[3];
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char revision[8]; /* firmware revision */
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char model[40]; /* model name */
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short reserved3[2];
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u_char vendor_cap; /* vendor unique capabilities */
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unsigned dmaflag : 1; /* DMA supported */
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unsigned lbaflag : 1; /* LBA supported - always 1 */
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unsigned iordydis : 1; /* IORDY can be disabled */
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unsigned iordyflag : 1; /* IORDY supported */
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unsigned : 1;
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unsigned ovlapflag : 1; /* overlap operation supported */
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unsigned : 1;
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unsigned idmaflag : 1; /* interleaved DMA supported */
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short reserved4;
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u_short pio_timing; /* PIO cycle timing */
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u_short dma_timing; /* DMA cycle timing */
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u_short flags;
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#define AT_FLAG_54_58 1 /* words 54-58 valid */
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#define AT_FLAG_64_70 2 /* words 64-70 valid */
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short reserved5[8];
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u_char swdma_flag; /* singleword DMA mode supported */
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u_char swdma_active; /* singleword DMA mode active */
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u_char mwdma_flag; /* multiword DMA mode supported */
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u_char mwdma_active; /* multiword DMA mode active */
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u_char apio_flag; /* advanced PIO mode supported */
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u_char reserved6;
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u_short mwdma_min; /* min. M/W DMA time per word (ns) */
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u_short mwdma_dflt; /* recommended M/W DMA time (ns) - optional */
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u_short pio_nfctl_min; /* min. PIO cycle time w/o flow ctl - optional */
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u_short pio_iordy_min; /* min. PIO c/t with IORDY flow ctl - optional */
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short reserved7[2];
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u_short rls_ovlap; /* release time (us) for overlap cmd - optional */
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u_short rls_service; /* release time (us) for service cmd - optional */
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};
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/*
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* ATAPI operation result structure
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*/
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struct atapires {
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u_char code; /* result code */
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#define RES_OK 0 /* i/o done */
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#define RES_ERR 1 /* i/o finished with error */
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#define RES_NOTRDY 2 /* controller not ready */
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#define RES_NODRQ 3 /* no data request */
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#define RES_INVDIR 4 /* invalid bus phase direction */
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#define RES_OVERRUN 5 /* data overrun */
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#define RES_UNDERRUN 6 /* data underrun */
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u_char status; /* status register contents */
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u_char error; /* error register contents */
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};
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struct atapidrv { /* delayed attach info */
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int ctlr; /* IDE controller, 0/1 */
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int unit; /* drive unit, 0/1 */
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int port; /* controller base port */
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int attached; /* the drive is attached */
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};
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struct buf;
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struct wcd;
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typedef void atapi_callback_t(struct wcd *, struct buf *, int, struct atapires);
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struct atapicmd { /* ATAPI command block */
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struct atapicmd *next; /* next command in queue */
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int busy; /* busy flag */
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u_char cmd[16]; /* command and args */
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int unit; /* drive unit number */
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int count; /* byte count, >0 - read, <0 - write */
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char *addr; /* data to transfer */
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atapi_callback_t *callback; /* call when done */
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void *cbarg1; /* callback arg 1 */
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void *cbarg2; /* callback arg 1 */
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struct atapires result; /* resulting error code */
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};
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struct atapi { /* ATAPI controller data */
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u_short port; /* i/o port base */
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u_char ctrlr; /* physical controller number */
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u_int debug : 1; /* trace enable flag */
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u_int cmd16 : 1; /* 16-byte command flag */
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u_int intrcmd : 1; /* interrupt before cmd flag */
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u_int slow : 1; /* slow reaction device */
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u_int accel : 1; /* accelerated reaction device */
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u_int use_dsc : 1; /* use DSC completition handeling */
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u_int wait_for_dsc : 1;
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u_int dsc_timeout;
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u_char attached[2]; /* units are attached to subdrivers */
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struct atapi_params *params[2]; /* params for units 0,1 */
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struct atapicmd *queue; /* queue of commands to perform */
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struct atapicmd *tail; /* tail of queue */
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struct atapicmd *free; /* queue of free command blocks */
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struct atapicmd cmdrq[16]; /* pool of command requests */
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};
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#ifdef KERNEL
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struct atapi;
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extern struct atapidrv atapi_drvtab[4]; /* delayed attach info */
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extern int atapi_ndrv; /* the number of potential drives */
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extern struct atapi *atapi_tab; /* the table of atapi controllers */
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#ifndef ATAPI_STATIC
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# define atapi_start (*atapi_start_ptr)
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# define atapi_intr (*atapi_intr_ptr)
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# define atapi_debug (*atapi_debug_ptr)
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# define atapi_request_wait (*atapi_request_wait_ptr)
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# define atapi_request_callback (*atapi_request_callback_ptr)
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# define atapi_request_immediate (*atapi_request_immediate_ptr)
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#endif
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#ifndef ATAPI_MODULE
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int atapi_attach (int ctlr, int unit, int port);
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#endif
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/*
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* These "functions" are declared with archaic `extern's because they are
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* actually pointers in the !ATAPI_STATIC case.
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*/
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extern int atapi_start (int ctrlr);
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extern int atapi_intr (int ctrlr);
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extern void atapi_debug (struct atapi *ata, int on);
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extern struct atapires atapi_request_wait (struct atapi *ata, int unit,
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u_char cmd, u_char a1, u_char a2, u_char a3, u_char a4,
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u_char a5, u_char a6, u_char a7, u_char a8, u_char a9,
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u_char a10, u_char a11, u_char a12, u_char a13, u_char a14, u_char a15,
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char *addr, int count);
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extern void atapi_request_callback (struct atapi *ata, int unit,
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u_char cmd, u_char a1, u_char a2, u_char a3, u_char a4,
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u_char a5, u_char a6, u_char a7, u_char a8, u_char a9,
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u_char a10, u_char a11, u_char a12, u_char a13, u_char a14, u_char a15,
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char *addr, int count, atapi_callback_t *done, void *x, void *y);
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extern struct atapires atapi_request_immediate (struct atapi *ata, int unit,
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u_char cmd, u_char a1, u_char a2, u_char a3, u_char a4,
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u_char a5, u_char a6, u_char a7, u_char a8, u_char a9,
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u_char a10, u_char a11, u_char a12, u_char a13, u_char a14, u_char a15,
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char *addr, int count);
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#endif
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