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