NetBSD/sys/arch/alpha/tc/asc.c

386 lines
11 KiB
C

/* $NetBSD: asc.c,v 1.4 1997/04/07 23:40:52 cgd Exp $ */
/*
* Copyright (c) 1997 Jason R. Thorpe.
* All rights reserved.
*
* 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 for the NetBSD Project
* by Jason R. Thorpe.
* 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.
*/
/*
* Copyright (c) 1996 Charles M. Hannum. All rights reserved.
*
* 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 Charles M. Hannum.
* 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.
*/
/*
* Copyright (c) 1994 Peter Galbavy
* Copyright (c) 1995 Paul Kranenburg
* All rights reserved.
*
* 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 Peter Galbavy
* 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.
*/
/*
* Based on aic6360 by Jarle Greipsland
*
* Acknowledgements: Many of the algorithms used in this driver are
* inspired by the work of Julian Elischer (julian@tfs.com) and
* Charles Hannum (mycroft@duality.gnu.ai.mit.edu). Thanks a million!
*/
#include <machine/options.h> /* Config options headers */
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
__KERNEL_RCSID(0, "$NetBSD: asc.c,v 1.4 1997/04/07 23:40:52 cgd Exp $");
#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/device.h>
#include <sys/buf.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <sys/queue.h>
#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>
#include <scsi/scsi_message.h>
#include <machine/cpu.h>
#include <dev/ic/ncr53c9xreg.h>
#include <dev/ic/ncr53c9xvar.h>
#include <dev/tc/tcvar.h>
#include <alpha/tc/tcdsvar.h>
#include <alpha/tc/ascvar.h>
void ascattach __P((struct device *, struct device *, void *));
int ascmatch __P((struct device *, struct cfdata *, void *));
/* Linkup to the rest of the kernel */
struct cfattach asc_ca = {
sizeof(struct asc_softc), ascmatch, ascattach
};
struct cfdriver asc_cd = {
NULL, "asc", DV_DULL
};
struct scsi_adapter asc_switch = {
ncr53c9x_scsi_cmd,
minphys, /* no max at this level; handled by DMA code */
NULL,
NULL,
};
struct scsi_device asc_dev = {
NULL, /* Use default error handler */
NULL, /* have a queue, served by this */
NULL, /* have no async handler */
NULL, /* Use default 'done' routine */
};
/*
* Functions and the switch for the MI code.
*/
u_char asc_read_reg __P((struct ncr53c9x_softc *, int));
void asc_write_reg __P((struct ncr53c9x_softc *, int, u_char));
int asc_dma_isintr __P((struct ncr53c9x_softc *));
void asc_dma_reset __P((struct ncr53c9x_softc *));
int asc_dma_intr __P((struct ncr53c9x_softc *));
int asc_dma_setup __P((struct ncr53c9x_softc *, caddr_t *,
size_t *, int, size_t *));
void asc_dma_go __P((struct ncr53c9x_softc *));
void asc_dma_stop __P((struct ncr53c9x_softc *));
int asc_dma_isactive __P((struct ncr53c9x_softc *));
void asc_clear_latched_intr __P((struct ncr53c9x_softc *));
struct ncr53c9x_glue asc_glue = {
asc_read_reg,
asc_write_reg,
asc_dma_isintr,
asc_dma_reset,
asc_dma_intr,
asc_dma_setup,
asc_dma_go,
asc_dma_stop,
asc_dma_isactive,
asc_clear_latched_intr,
};
int
ascmatch(parent, cf, aux)
struct device *parent;
struct cfdata *cf;
void *aux;
{
struct tcdsdev_attach_args *tcdsdev = aux;
if (strncmp(tcdsdev->tcdsda_modname, "PMAZ-AA ", TC_ROM_LLEN))
return (0);
return (!tc_badaddr(tcdsdev->tcdsda_addr));
}
/*
* Attach this instance, and then all the sub-devices
*/
void
ascattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
register struct tcdsdev_attach_args *tcdsdev = aux;
struct asc_softc *asc = (void *)self;
struct ncr53c9x_softc *sc = &asc->sc_ncr53c9x;
/*
* Set up glue for MI code early; we use some of it here.
*/
sc->sc_glue = &asc_glue;
asc->sc_reg = (volatile u_int32_t *)tcdsdev->tcdsda_addr;
asc->sc_cookie = tcdsdev->tcdsda_cookie;
asc->sc_dma = tcdsdev->tcdsda_sc;
tcds_intr_establish(parent, asc->sc_cookie, TC_IPL_BIO,
(int (*)(void *))ncr53c9x_intr, sc);
if (parent->dv_cfdata->cf_driver == &tcds_cd) {
sc->sc_id = tcdsdev->tcdsda_id;
sc->sc_freq = tcdsdev->tcdsda_freq;
} else {
/* XXX */
sc->sc_id = 7;
sc->sc_freq = 24000000;
}
/* gimme Mhz */
sc->sc_freq /= 1000000;
asc->sc_dma->sc_asc = asc; /* XXX */
/*
* XXX More of this should be in ncr53c9x_attach(), but
* XXX should we really poke around the chip that much in
* XXX the MI code? Think about this more...
*/
/*
* Set up static configuration info.
*/
sc->sc_cfg1 = sc->sc_id | NCRCFG1_PARENB;
sc->sc_cfg2 = NCRCFG2_SCSI2;
sc->sc_cfg3 = 0x4; /* Save residual byte. XXX??? */
sc->sc_rev = NCR_VARIANT_NCR53C94;
/*
* XXX minsync and maxxfer _should_ be set up in MI code,
* XXX but it appears to have some dependency on what sort
* XXX of DMA we're hooked up to, etc.
*/
/*
* This is the value used to start sync negotiations
* Note that the NCR register "SYNCTP" is programmed
* in "clocks per byte", and has a minimum value of 4.
* The SCSI period used in negotiation is one-fourth
* of the time (in nanoseconds) needed to transfer one byte.
* Since the chip's clock is given in MHz, we have the following
* formula: 4 * period = (1000 / freq) * 4
*/
sc->sc_minsync = 1000 / sc->sc_freq;
sc->sc_maxxfer = 64 * 1024;
/* Do the common parts of attachment. */
ncr53c9x_attach(sc, &asc_switch, &asc_dev);
}
/*
* Glue functions.
*/
u_char
asc_read_reg(sc, reg)
struct ncr53c9x_softc *sc;
int reg;
{
struct asc_softc *asc = (struct asc_softc *)sc;
u_char v;
v = asc->sc_reg[reg * 2] & 0xff;
#if 1
alpha_mb();
#endif
return (v);
}
void
asc_write_reg(sc, reg, val)
struct ncr53c9x_softc *sc;
int reg;
u_char val;
{
struct asc_softc *asc = (struct asc_softc *)sc;
asc->sc_reg[reg * 2] = val;
alpha_mb();
}
int
asc_dma_isintr(sc)
struct ncr53c9x_softc *sc;
{
struct asc_softc *asc = (struct asc_softc *)sc;
return (tcds_dma_isintr(asc->sc_dma));
}
void
asc_dma_reset(sc)
struct ncr53c9x_softc *sc;
{
struct asc_softc *asc = (struct asc_softc *)sc;
tcds_dma_reset(asc->sc_dma);
}
int
asc_dma_intr(sc)
struct ncr53c9x_softc *sc;
{
struct asc_softc *asc = (struct asc_softc *)sc;
return (tcds_dma_intr(asc->sc_dma));
}
int
asc_dma_setup(sc, addr, len, datain, dmasize)
struct ncr53c9x_softc *sc;
caddr_t *addr;
size_t *len;
int datain;
size_t *dmasize;
{
struct asc_softc *asc = (struct asc_softc *)sc;
return (tcds_dma_setup(asc->sc_dma, addr, len, datain, dmasize));
}
void
asc_dma_go(sc)
struct ncr53c9x_softc *sc;
{
struct asc_softc *asc = (struct asc_softc *)sc;
tcds_dma_go(asc->sc_dma);
}
void
asc_dma_stop(sc)
struct ncr53c9x_softc *sc;
{
#if 0
struct asc_softc *asc = (struct asc_softc *)sc;
#endif
/*
* XXX STOP DMA HERE!
*/
}
int
asc_dma_isactive(sc)
struct ncr53c9x_softc *sc;
{
struct asc_softc *asc = (struct asc_softc *)sc;
return (tcds_dma_isactive(asc->sc_dma));
}
void
asc_clear_latched_intr(sc)
struct ncr53c9x_softc *sc;
{
struct asc_softc *asc = (struct asc_softc *)sc;
/* Clear the TCDS interrupt bit. */
(void)tcds_scsi_isintr(asc->sc_dma, 1);
}