Split sii driver into bus-dependent front-end and chip-specific back-end:
sii_ds.c -- front-end for Decstation 2100, 3100, 5100(?)
sii.c -- driver for DEC scsi asic used in decstations and vax 3400s
siivar.h -- shared softc
This commit is contained in:
jonathan
parent
de83b4558f
commit
986daa1436
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@ -1,4 +1,4 @@
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/* $NetBSD: sii.c,v 1.16 1996/10/11 00:44:58 christos Exp $ */
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/* $NetBSD: sii.c,v 1.17 1996/10/13 03:02:39 jonathan Exp $ */
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/*-
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* Copyright (c) 1992, 1993
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@ -64,70 +64,31 @@
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#include <pmax/dev/device.h>
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#include <pmax/dev/scsi.h>
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#include <pmax/dev/siireg.h>
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#include <pmax/dev/siivar.h>
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#include <pmax/pmax/kn01.h>
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typedef struct scsi_state {
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int statusByte; /* status byte returned during STATUS_PHASE */
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int dmaDataPhase; /* which data phase to expect */
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int dmaCurPhase; /* SCSI phase if DMA is in progress */
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int dmaPrevPhase; /* SCSI phase of DMA suspended by disconnect */
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u_short *dmaAddr[2]; /* DMA buffer memory address */
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int dmaBufIndex; /* which of the above is currently in use */
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int dmalen; /* amount to transfer in this chunk */
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int cmdlen; /* total remaining amount of cmd to transfer */
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u_char *cmd; /* current pointer within scsicmd->cmd */
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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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u_short flags; /* see below */
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u_short prevComm; /* command reg before disconnect */
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u_short dmaCtrl; /* DMA control register if disconnect */
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u_short dmaAddrL; /* DMA address register if disconnect */
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u_short dmaAddrH; /* DMA address register if disconnect */
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u_short dmaCnt; /* DMA count if disconnect */
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u_short dmaByte; /* DMA byte if disconnect on odd boundary */
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u_short dmaReqAck; /* DMA synchronous xfer offset or 0 if async */
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} State;
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/* state flags */
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#define FIRST_DMA 0x01 /* true if no data DMA started yet */
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#define PARITY_ERR 0x02 /* true if parity error seen */
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#define SII_NCMD 7
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struct siisoftc {
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struct device sc_dev; /* us as a device */
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SIIRegs *sc_regs; /* HW address of SII controller chip */
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int sc_flags;
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int sc_target; /* target SCSI ID if connected */
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ScsiCmd *sc_cmd[SII_NCMD]; /* active command indexed by ID */
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State sc_st[SII_NCMD]; /* state info for each active command */
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#ifdef NEW_SCSI
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struct scsi_link sc_link; /* scsi lint struct */
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#endif
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};
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/* Machine-indepedent back-end attach entry point */
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void siiattach __P((struct siisoftc *sc));
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/*
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* Device definition for autoconfiguration.
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*
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* Autoconfig definition of driver front-end
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*/
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int siimatch __P((struct device * parent, void *cfdata, void *aux));
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void siiattach __P((struct device *parent, struct device *self, void *aux));
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int siiprint(void*, char*);
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int sii_doprobe __P((void *addr, int unit, int flags, int pri,
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struct device *self));
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int siiintr __P((void *sc));
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extern struct cfdriver sii_cd;
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int old_siimatch __P((struct device * parent, void *cfdata, void *aux));
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void old_siiattach __P((struct device *parent, struct device *self, void *aux));
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extern struct cfattach sii_ca;
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struct cfattach sii_ca = {
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sizeof(struct siisoftc), siimatch, siiattach
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sizeof(struct siisoftc), old_siimatch, old_siiattach
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};
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extern struct cfdriver sii_cd;
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struct cfdriver sii_cd = {
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NULL, "sii", DV_DULL
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};
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int siiprint(void*, char*);
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int siiintr __P((void *sc));
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#ifdef USE_NEW_SCSI
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/* Glue to the machine-independent scsi */
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struct scsi_adapter asc_switch = {
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@ -202,10 +163,12 @@ u_char sii_buf[256]; /* used for extended messages */
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#define NOWAIT 0
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#define WAIT 1
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/* define a safe address in the SCSI buffer for doing status & message DMA */
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#define SII_BUF_ADDR (MACH_PHYS_TO_UNCACHED(KN01_SYS_SII_B_START) \
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+ SII_MAX_DMA_XFER_LENGTH * 14)
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/*
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* Define a safe address in the SCSI buffer for doing status & message DMA
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* XXX why not add another field to softc?
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*/
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#define SII_BUF_ADDR(sc) ((sc)->sc_buf + SII_MAX_DMA_XFER_LENGTH * 14)
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/*
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* Other forward references
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@ -243,7 +206,7 @@ struct pmax_driver siidriver = {
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* Match driver based on name
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*/
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int
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siimatch(parent, match, aux)
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old_siimatch(parent, match, aux)
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struct device *parent;
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void *match;
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void *aux;
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@ -266,21 +229,31 @@ siimatch(parent, match, aux)
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}
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void
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siiattach(parent, self, aux)
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old_siiattach(parent, self, aux)
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struct device *parent;
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struct device *self;
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void *aux;
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{
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register struct confargs *ca = aux;
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register struct siisoftc *sc = (struct siisoftc *) self;
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register void *siiaddr;
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register int i;
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siiaddr = (void*)MACH_PHYS_TO_UNCACHED(ca->ca_addr);
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sc->sc_regs = (SIIRegs *)siiaddr;
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sc->sc_regs = (SIIRegs *)MACH_PHYS_TO_UNCACHED(ca->ca_addr);
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sc->sc_flags = sc->sc_dev.dv_cfdata->cf_flags;
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sc->sc_target = -1; /* no command active */
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siiattach(sc);
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/* tie pseudo-slot to device */
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BUS_INTR_ESTABLISH(ca, siiintr, sc);
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kprintf("\n");
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}
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void
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siiattach(sc)
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register struct siisoftc *sc;
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{
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register int i;
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/*
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* Give each target its own DMA buffer region.
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* Make it big enough for 2 max transfers so we can ping pong buffers
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@ -288,8 +261,7 @@ siiattach(parent, self, aux)
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*/
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for (i = 0; i < SII_NCMD; i++) {
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sc->sc_st[i].dmaAddr[0] = (u_short *)
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MACH_PHYS_TO_UNCACHED(KN01_SYS_SII_B_START) +
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2 * SII_MAX_DMA_XFER_LENGTH * i;
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sc->sc_buf + 2 * SII_MAX_DMA_XFER_LENGTH * i;
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sc->sc_st[i].dmaAddr[1] = sc->sc_st[i].dmaAddr[0] +
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SII_MAX_DMA_XFER_LENGTH;
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}
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@ -298,13 +270,13 @@ siiattach(parent, self, aux)
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(void) pmax_add_scsi(&siidriver, sc->sc_dev.dv_unit);
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sii_Reset(sc, RESET);
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/*priority = ca->ca_slot;*/
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/* tie pseudo-slot to device */
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BUS_INTR_ESTABLISH(ca, siiintr, sc);
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kprintf("\n");
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#ifdef USE_NEW_SCSI
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/* XXX probe SCSI bus and attach slave devices */
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#endif
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}
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/*
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* Start activity on a SCSI device.
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* We maintain information on each device separately since devices can
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@ -517,11 +489,11 @@ sii_StartCmd(sc, target)
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state->dmaCurPhase = SII_MSG_OUT_PHASE,
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state->dmalen = 6;
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CopyToBuffer((u_short *)sii_buf,
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(volatile u_short *)SII_BUF_ADDR, 6);
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(volatile u_short *)SII_BUF_ADDR(sc), 6);
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regs->slcsr = target;
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regs->dmctrl = state->dmaReqAck;
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regs->dmaddrl = (u_short)(SII_BUF_ADDR >> 1);
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regs->dmaddrh = (u_short)(SII_BUF_ADDR >> 17) & 03;
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regs->dmaddrl = (u_short)(SII_BUF_ADDR(sc) >> 1);
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regs->dmaddrh = (u_short)(SII_BUF_ADDR(sc) >> 17) & 03;
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regs->dmlotc = 6;
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regs->comm = SII_DMA | SII_INXFER | SII_SELECT | SII_ATN |
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SII_CON | SII_MSG_OUT_PHASE;
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@ -1747,15 +1719,16 @@ sii_DoSync(regs, state)
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regs->dstat = SII_DNE;
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wbflush();
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}
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#else
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CopyToBuffer((u_short *)sii_buf, (volatile u_short *)SII_BUF_ADDR, 5);
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#else /* 0 */
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CopyToBuffer((u_short *)sii_buf,
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(volatile u_short *)SII_BUF_ADDR(sc), 5);
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kprintf("sii_DoSync: %x %x %x ds %x\n",
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((volatile u_short *)SII_BUF_ADDR)[0],
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((volatile u_short *)SII_BUF_ADDR)[2],
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((volatile u_short *)SII_BUF_ADDR)[4],
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((volatile u_short *)SII_BUF_ADDR(sc))[0],
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((volatile u_short *)SII_BUF_ADDR(sc))[2],
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((volatile u_short *)SII_BUF_ADDR(sc))[4],
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regs->dstat); /* XXX */
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regs->dmaddrl = (u_short)(SII_BUF_ADDR >> 1);
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regs->dmaddrh = (u_short)(SII_BUF_ADDR >> 17) & 03;
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regs->dmaddrl = (u_short)(SII_BUF_ADDR(sc) >> 1);
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regs->dmaddrh = (u_short)(SII_BUF_ADDR(sc) >> 17) & 03;
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regs->dmlotc = 5;
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regs->comm = SII_DMA | SII_INXFER | SII_ATN |
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(regs->cstat & SII_STATE_MSK) | SII_MSG_OUT_PHASE;
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/* clear the DNE, other errors handled later */
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regs->dstat = SII_DNE;
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wbflush();
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#endif
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#endif /* 0 */
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#if 0
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SII_WAIT_UNTIL(dstat, regs->dstat, dstat & (SII_CI | SII_DI),
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@ -0,0 +1,96 @@
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/* $NetBSD: sii_ds.c,v 1.1 1996/10/13 03:02:40 jonathan Exp $ */
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/*
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* Copyright 1996 The Board of Trustees of The Leland Stanford
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* Junior University. All Rights Reserved.
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*
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* Permission to use, copy, modify, and distribute this
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* software and its documentation for any purpose and without
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* fee is hereby granted, provided that the above copyright
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* notice appear in all copies. Stanford University
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* makes no representations about the suitability of this
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* software for any purpose. It is provided "as is" without
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* express or implied warranty.
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*
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* this driver contributed by Jonathan Stone
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/types.h>
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#include <sys/device.h>
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#include <sys/tty.h>
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#include <machine/autoconf.h>
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#include <pmax/dev/device.h> /* XXX old pmax SCSI drivers */
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#include <pmax/dev/siireg.h>
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#include <pmax/dev/siivar.h>
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#include <pmax/pmax/kn01.h> /* kn01 (ds3100) address constants */
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extern struct cfdriver mainbus_cd; /* XXX */
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/*
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* Autoconfig definition of driver front-end
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*/
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int sii_ds_match __P((struct device * parent, void *cfdata, void *aux));
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void sii_ds_attach __P((struct device *parent, struct device *self, void *aux));
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extern struct cfattach sii_ds_ca;
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struct cfattach sii_ds_ca = {
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sizeof(struct siisoftc), sii_ds_match, sii_ds_attach
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};
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/* define a safe address in the SCSI buffer for doing status & message DMA */
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#define SII_BUF_ADDR (MACH_PHYS_TO_UNCACHED(KN01_SYS_SII_B_START) \
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+ SII_MAX_DMA_XFER_LENGTH * 14)
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/*
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* Match driver on Decstation (2100, 3100, 5100) based on name and probe.
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*/
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int
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sii_ds_match(parent, match, aux)
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struct device *parent;
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void *match;
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void *aux;
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{
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struct confargs *ca = aux;
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register void * siiaddr;
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if (strcmp(ca->ca_name, "sii") != 0 &&
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strncmp(ca->ca_name, "PMAZ-AA ", 8) != 0) /*XXX*/
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return (0);
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/* XXX check for bad address, untested */
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siiaddr = (void *)ca->ca_addr;
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if (siiaddr != (void *)MACH_PHYS_TO_UNCACHED(KN01_SYS_SII)) {
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kprintf("(siimatch: bad addr %x, substituting %x\n",
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ca->ca_addr, MACH_PHYS_TO_UNCACHED(KN01_SYS_SII));
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siiaddr = (void *)MACH_PHYS_TO_UNCACHED(KN01_SYS_SII);
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}
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if (badaddr(siiaddr, 4))
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return (0);
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return (1);
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}
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void
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sii_ds_attach(parent, self, aux)
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struct device *parent;
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struct device *self;
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void *aux;
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{
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register struct confargs *ca = aux;
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register struct siisoftc *sc = (struct siisoftc *) self;
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sc->sc_regs = (SIIRegs *)MACH_PHYS_TO_UNCACHED(ca->ca_addr);
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/* set up scsi buffer. XXX Why statically allocated? */
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sc->sc_buf = (void*)(MACH_PHYS_TO_UNCACHED(KN01_SYS_SII_B_START));
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siiattach(sc);
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/* tie pseudo-slot to device */
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BUS_INTR_ESTABLISH(ca, siiintr, sc);
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kprintf("\n");
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}
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@ -0,0 +1,51 @@
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/* $NetBSD: siivar.h,v 1.1 1996/10/13 03:02:41 jonathan Exp $ */
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#ifndef _SIIVAR_H
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#define _SIIVAR_H
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typedef struct scsi_state {
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int statusByte; /* status byte returned during STATUS_PHASE */
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int dmaDataPhase; /* which data phase to expect */
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int dmaCurPhase; /* SCSI phase if DMA is in progress */
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int dmaPrevPhase; /* SCSI phase of DMA suspended by disconnect */
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u_short *dmaAddr[2]; /* DMA buffer memory address */
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int dmaBufIndex; /* which of the above is currently in use */
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int dmalen; /* amount to transfer in this chunk */
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int cmdlen; /* total remaining amount of cmd to transfer */
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u_char *cmd; /* current pointer within scsicmd->cmd */
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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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u_short flags; /* see below */
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u_short prevComm; /* command reg before disconnect */
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u_short dmaCtrl; /* DMA control register if disconnect */
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u_short dmaAddrL; /* DMA address register if disconnect */
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u_short dmaAddrH; /* DMA address register if disconnect */
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u_short dmaCnt; /* DMA count if disconnect */
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u_short dmaByte; /* DMA byte if disconnect on odd boundary */
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u_short dmaReqAck; /* DMA synchronous xfer offset or 0 if async */
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} State;
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/* state flags */
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#define FIRST_DMA 0x01 /* true if no data DMA started yet */
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#define PARITY_ERR 0x02 /* true if parity error seen */
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#define SII_NCMD 7
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struct siisoftc {
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struct device sc_dev; /* us as a device */
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void *sc_buf; /* DMA buffer (may be special mem) */
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SIIRegs *sc_regs; /* HW address of SII controller chip */
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int sc_flags;
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int sc_target; /* target SCSI ID if connected */
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ScsiCmd *sc_cmd[SII_NCMD]; /* active command indexed by ID */
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State sc_st[SII_NCMD]; /* state info for each active command */
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#ifdef NEW_SCSI
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struct scsi_link sc_link; /* scsi lint struct */
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#endif
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};
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int siiintr __P((void *sc));
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/* Machine-indepedent back-end attach entry point */
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void siiattach __P((struct siisoftc *sc));
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#endif /* _SIIVAR_H */
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