cac2057a29
Very rudimentary, lots of error checks missing, but it works. Dont do an ls on two different CD's though, it will eat your changer mechanism for lunch :), this clearly needs some more thought. Until then this will enable those with changers to mount their multible CD's and doing "sensible" work.... Thanks to Andrew Gordon <arg@arg1.demon.co.uk> for donating a drive (a NEC CDR-C251 4x4) that makes this possible to develop.
289 lines
13 KiB
C
289 lines
13 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_ABORTED_COMMAND 0xb0 /* command aborted, try again */
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#define AER_SK_MISCOMPARE 0xe0 /* data did not match the medium */
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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_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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/*
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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 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_char debug : 1; /* trace enable flag */
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u_char cmd16 : 1; /* 16-byte command flag */
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u_char intrcmd : 1; /* interrupt before cmd flag */
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u_char slow : 1; /* slow reaction device */
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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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