xref: /src/sys/dev/ic/siopvar_common.h

/*	$NetBSD: siopvar_common.h,v 1.13 2002/04/20 00:15:54 bouyer Exp $	*/

/*
 * Copyright (c) 2000 Manuel Bouyer.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by Manuel Bouyer
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

/* common struct and routines used by siop and esiop */

#ifndef SIOP_DEFAULT_TARGET
#define SIOP_DEFAULT_TARGET 7
#endif

/* tables used by SCRIPT */
typedef struct scr_table {
	u_int32_t count;
	u_int32_t addr;
} scr_table_t __attribute__((__packed__));

/* Number of scatter/gather entries */
#define SIOP_NSG	(MAXPHYS/NBPG + 1)	/* XXX NBPG */

/*
 * This structure interfaces the SCRIPT with the driver; it describes a full
 * transfer.
 */
struct siop_common_xfer {
	u_int8_t msg_out[8];	/* 0 */
	u_int8_t msg_in[8];	/* 8 */
	u_int32_t status;	/* 16 */
	u_int32_t pad1;		/* 20 */
	u_int32_t id;		/* 24 */
	u_int32_t pad2;		/* 28 */
	scr_table_t t_msgin;	/* 32 */
	scr_table_t t_extmsgin;	/* 40 */
	scr_table_t t_extmsgdata; /* 48 */
	scr_table_t t_msgout;	/* 56 */
	scr_table_t cmd;	/* 64 */
	scr_table_t t_status;	/* 72 */
	scr_table_t data[SIOP_NSG]; /* 80 */
} __attribute__((__packed__));

/* status can hold the SCSI_* status values, and 2 additionnal values: */
#define SCSI_SIOP_NOCHECK	0xfe	/* don't check the scsi status */
#define SCSI_SIOP_NOSTATUS	0xff	/* device didn't report status */

/*
 * This decribes a command handled by the SCSI controller
 */
struct siop_common_cmd {
	struct siop_common_softc *siop_sc; /* points back to our adapter */
	struct siop_common_target *siop_target; /* pointer to our target def */
	struct scsipi_xfer *xs; /* xfer from the upper level */
	struct siop_common_xfer *siop_tables; /* tables for this cmd */
	bus_addr_t	dsa; /* DSA value to load */
	bus_dmamap_t	dmamap_cmd;
	bus_dmamap_t	dmamap_data;
	int status;
	int flags;
	int tag;	/* tag used for tagged command queuing */
};

/* status defs */
#define CMDST_FREE		0 /* cmd slot is free */
#define CMDST_READY		1 /* cmd slot is waiting for processing */
#define CMDST_ACTIVE		2 /* cmd slot is being processed */
#define CMDST_DONE		3 /* cmd slot has been processed */
/* flags defs */
#define CMDFL_TIMEOUT	0x0001 /* cmd timed out */
#define CMDFL_TAG	0x0002 /* tagged cmd */

/* per-target struct */
struct siop_common_target {
	int status;	/* target status, see below */
	int flags;	/* target flags, see below */
	u_int32_t id;	/* for SELECT FROM */
	int period;
	int offset;
};

/* target status */
#define TARST_PROBING	0 /* target is being probed */
#define TARST_ASYNC	1 /* target needs sync/wide negotiation */
#define TARST_WIDE_NEG	2 /* target is doing wide negotiation */
#define TARST_SYNC_NEG	3 /* target is doing sync negotiation */
#define TARST_OK	4 /* sync/wide agreement is valid */

/* target flags */
#define TARF_SYNC	0x01 /* target can do sync */
#define TARF_WIDE	0x02 /* target can do wide */
#define TARF_TAG	0x04 /* target can do tags */
#define TARF_ISWIDE	0x08 /* target is wide */

/* Driver internal state */
struct siop_common_softc {
	struct device sc_dev;
	struct scsipi_channel sc_chan;
	struct scsipi_adapter sc_adapt;
	int features;			/* chip's features */
	int ram_size;
	int maxburst;
	int maxoff;
	int clock_div;			/* async. clock divider (scntl3) */
	int clock_period;		/* clock period (ns * 10) */
	int minsync;			/* min and max sync period, */
	int maxsync;			/* as sent in SDTR message */
	bus_space_tag_t sc_rt;		/* bus_space registers tag */
	bus_space_handle_t sc_rh;	/* bus_space registers handle */
	bus_addr_t sc_raddr;		/* register adresses */
	bus_space_tag_t sc_ramt;	/* bus_space ram tag */
	bus_space_handle_t sc_ramh;	/* bus_space ram handle */
	bus_dma_tag_t sc_dmat;		/* bus DMA tag */
	void (*sc_reset) __P((struct siop_common_softc*)); /* reset callback */
	bus_dmamap_t  sc_scriptdma;	/* DMA map for script */
	bus_addr_t sc_scriptaddr;	/* on-board ram or physical adress */
	u_int32_t *sc_script;		/* script location in memory */
	struct siop_common_target *targets[16]; /* per-target states */
};

/* features */
#define SF_BUS_WIDE	0x00000001 /* wide bus */
#define SF_BUS_ULTRA	0x00000002 /* Ultra (20Mhz) bus */
#define SF_BUS_ULTRA2	0x00000004 /* Ultra2 (40Mhz) bus */
#define SF_BUS_DIFF	0x00000008 /* differential bus */

#define SF_CHIP_LED0	0x00000100 /* led on GPIO0 */
#define SF_CHIP_DBLR	0x00000200 /* clock doubler or quadrupler */
#define SF_CHIP_QUAD	0x00000400 /* clock quadrupler, with PPL */
#define SF_CHIP_FIFO	0x00000800 /* large fifo */
#define SF_CHIP_PF	0x00001000 /* Intructions prefetch */
#define SF_CHIP_RAM	0x00002000 /* on-board RAM */
#define SF_CHIP_LS	0x00004000 /* load/store instruction */
#define SF_CHIP_10REGS	0x00008000 /* 10 scratch registers */
#define SF_CHIP_DFBC	0x00010000 /* Use DFBC register */

#define SF_PCI_RL	0x01000000 /* PCI read line */
#define SF_PCI_RM	0x02000000 /* PCI read multiple */
#define SF_PCI_BOF	0x04000000 /* PCI burst opcode fetch */
#define SF_PCI_CLS	0x08000000 /* PCI cache line size */
#define SF_PCI_WRI	0x10000000 /* PCI write and invalidate */

void	siop_common_reset __P((struct siop_common_softc *));
void	siop_setuptables __P((struct siop_common_cmd *));
int	siop_modechange __P((struct siop_common_softc *));

int	siop_wdtr_neg __P((struct siop_common_cmd *));
int	siop_sdtr_neg __P((struct siop_common_cmd *));
void	siop_sdtr_msg __P((struct siop_common_cmd *, int, int, int));
void	siop_wdtr_msg __P((struct siop_common_cmd *, int, int));
void	siop_update_xfer_mode __P((struct siop_common_softc *, int));
/* actions to take at return of siop_wdtr_neg() and siop_sdtr_neg() */
#define SIOP_NEG_NOP	0x0
#define SIOP_NEG_MSGOUT	0x1
#define SIOP_NEG_ACK	0x2

void	siop_minphys __P((struct buf *));
int	siop_ioctl __P((struct scsipi_channel *, u_long,
		caddr_t, int, struct proc *));
void 	siop_sdp __P((struct siop_common_cmd *));
void	siop_clearfifo __P((struct siop_common_softc *));
void	siop_resetbus __P((struct siop_common_softc *));