92 lines
3.3 KiB
C
92 lines
3.3 KiB
C
/* $NetBSD: ascvar.h,v 1.4 1997/11/28 18:23:40 mhitch Exp $ */
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/*
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* State kept for each active SCSI device.
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*/
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struct script;
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typedef struct scsi_state {
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struct script *script; /* saved script while processing error */
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int statusByte; /* status byte returned during STATUS_PHASE */
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int error; /* errno to pass back to device driver */
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u_char *dmaBufAddr; /* DMA buffer address */
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int dmalen; /* amount to transfer in this chunk */
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int dmaresid; /* amount not transfered if chunk suspended */
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int buflen; /* total remaining amount of data to transfer */
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char *buf; /* current pointer within scsicmd->buf */
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int flags; /* see below */
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int msglen; /* number of message bytes to read */
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int msgcnt; /* number of message bytes received */
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u_char sync_period; /* DMA synchronous period */
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u_char sync_offset; /* DMA synchronous xfer offset or 0 if async */
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u_char msg_out; /* next MSG_OUT byte to send */
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u_char msg_in[16]; /* buffer for multibyte messages */
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} State;
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/* state flags */
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#define DISCONN 0x001 /* true if currently disconnected from bus */
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#define DMA_IN_PROGRESS 0x002 /* true if data DMA started */
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#define DMA_IN 0x004 /* true if reading from SCSI device */
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#define DMA_RESUME 0x08 /* true if DMA was interrupted by disc. */
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#define DMA_OUT 0x010 /* true if writing to SCSI device */
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#define DID_SYNC 0x020 /* true if synchronous offset was negotiated */
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#define TRY_SYNC 0x040 /* true if try neg. synchronous offset */
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#define PARITY_ERR 0x080 /* true if parity error seen */
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#define CHECK_SENSE 0x100 /* true if doing sense command */
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/*
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* State kept for each active SCSI host interface (53C94).
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*/
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struct asc_softc {
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struct device sc_dev; /* us as a device */
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asc_regmap_t *regs; /* chip address */
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volatile int *dmar; /* DMA address register address */
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int sc_id; /* SCSI ID of this interface */
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int myidmask; /* ~(1 << myid) */
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int state; /* current SCSI connection state */
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int target; /* target SCSI ID if busy */
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struct script *script; /* next expected interrupt & action */
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ScsiCmd *cmd[ASC_NCMD]; /* active command indexed by SCSI ID */
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State st[ASC_NCMD]; /* state info for each active command */
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/* Start dma routine */
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int (*dma_start) __P((struct asc_softc *asc,
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struct scsi_state *state,
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caddr_t cp, int flag, int len, int off));
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/* End dma routine */
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void (*dma_end) __P((struct asc_softc *asc,
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struct scsi_state *state, int flag));
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u_char *dma_next;
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int dma_xfer; /* Dma len still to go */
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int min_period; /* Min transfer period clk/byte */
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int max_period; /* Max transfer period clk/byte */
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int ccf; /* CCF, whatever that really is? */
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int timeout_250; /* 250ms timeout */
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int tb_ticks; /* 4ns. ticks/tb channel ticks */
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#ifdef USE_NEW_SCSI
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struct scsipi_link sc_link; /* scsipi link struct */
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#endif
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};
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typedef struct asc_softc *asc_softc_t;
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#define ASC_STATE_IDLE 0 /* idle state */
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#define ASC_STATE_BUSY 1 /* selecting or currently connected */
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#define ASC_STATE_TARGET 2 /* currently selected as target */
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#define ASC_STATE_RESEL 3 /* currently waiting for reselect */
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#define ASC_SPEED_25_MHZ 250
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#define ASC_SPEED_12_5_MHZ 125
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void ascattach __P((struct asc_softc *asc, int bus_speed));
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int asc_intr __P ((void *asc));
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/*
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* Dma operations.
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*/
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#define ASCDMA_READ 1
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#define ASCDMA_WRITE 2
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