NetBSD/sys/arch/sparc/dev/esp.c

507 lines
15 KiB
C

/* $NetBSD: esp.c,v 1.70 1997/10/05 18:24:35 thorpej Exp $ */
/*-
* Copyright (c) 1997 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center.
*
* 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 the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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 <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 <dev/scsipi/scsi_all.h>
#include <dev/scsipi/scsipi_all.h>
#include <dev/scsipi/scsiconf.h>
#include <dev/scsipi/scsi_message.h>
#include <machine/cpu.h>
#include <machine/autoconf.h>
#include <dev/ic/ncr53c9xreg.h>
#include <dev/ic/ncr53c9xvar.h>
#include <sparc/dev/sbusvar.h>
#include <sparc/dev/dmareg.h>
#include <sparc/dev/dmavar.h>
#include <sparc/dev/espvar.h>
void espattach __P((struct device *, struct device *, void *));
int espmatch __P((struct device *, struct cfdata *, void *));
/* Linkup to the rest of the kernel */
struct cfattach esp_ca = {
sizeof(struct esp_softc), espmatch, espattach
};
struct cfdriver esp_cd = {
NULL, "esp", DV_DULL
};
struct scsipi_adapter esp_switch = {
ncr53c9x_scsi_cmd,
minphys, /* no max at this level; handled by DMA code */
NULL,
NULL,
};
struct scsipi_device esp_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 esp_read_reg __P((struct ncr53c9x_softc *, int));
void esp_write_reg __P((struct ncr53c9x_softc *, int, u_char));
int esp_dma_isintr __P((struct ncr53c9x_softc *));
void esp_dma_reset __P((struct ncr53c9x_softc *));
int esp_dma_intr __P((struct ncr53c9x_softc *));
int esp_dma_setup __P((struct ncr53c9x_softc *, caddr_t *,
size_t *, int, size_t *));
void esp_dma_go __P((struct ncr53c9x_softc *));
void esp_dma_stop __P((struct ncr53c9x_softc *));
int esp_dma_isactive __P((struct ncr53c9x_softc *));
struct ncr53c9x_glue esp_glue = {
esp_read_reg,
esp_write_reg,
esp_dma_isintr,
esp_dma_reset,
esp_dma_intr,
esp_dma_setup,
esp_dma_go,
esp_dma_stop,
esp_dma_isactive,
NULL, /* gl_clear_latched_intr */
};
int
espmatch(parent, cf, aux)
struct device *parent;
struct cfdata *cf;
void *aux;
{
register struct confargs *ca = aux;
register struct romaux *ra = &ca->ca_ra;
if (strcmp(cf->cf_driver->cd_name, ra->ra_name))
return (0);
if (ca->ca_bustype == BUS_SBUS)
return (1);
ra->ra_len = NBPG;
return (probeget(ra->ra_vaddr, 1) != -1);
}
/*
* Attach this instance, and then all the sub-devices
*/
void
espattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
register struct confargs *ca = aux;
struct esp_softc *esc = (void *)self;
struct ncr53c9x_softc *sc = &esc->sc_ncr53c9x;
struct bootpath *bp;
int dmachild = strncmp(parent->dv_xname, "dma", 3) == 0;
/*
* Set up glue for MI code early; we use some of it here.
*/
sc->sc_glue = &esp_glue;
/*
* Make sure things are sane. I don't know if this is ever
* necessary, but it seem to be in all of Torek's code.
*/
if (ca->ca_ra.ra_nintr != 1) {
printf(": expected 1 interrupt, got %d\n", ca->ca_ra.ra_nintr);
return;
}
esc->sc_pri = ca->ca_ra.ra_intr[0].int_pri;
printf(" pri %d", esc->sc_pri);
/*
* Map my registers in, if they aren't already in virtual
* address space.
*/
if (ca->ca_ra.ra_vaddr)
esc->sc_reg = (volatile u_char *) ca->ca_ra.ra_vaddr;
else {
esc->sc_reg = (volatile u_char *)
mapiodev(ca->ca_ra.ra_reg, 0, ca->ca_ra.ra_len);
}
/* Other settings */
esc->sc_node = ca->ca_ra.ra_node;
if (ca->ca_bustype == BUS_SBUS) {
sc->sc_id = getpropint(esc->sc_node, "initiator-id", 7);
sc->sc_freq = getpropint(esc->sc_node, "clock-frequency", -1);
} else {
sc->sc_id = 7;
sc->sc_freq = 24000000;
}
if (sc->sc_freq < 0)
sc->sc_freq = ((struct sbus_softc *)
sc->sc_dev.dv_parent)->sc_clockfreq;
/* gimme Mhz */
sc->sc_freq /= 1000000;
if (dmachild) {
esc->sc_dma = (struct dma_softc *)parent;
esc->sc_dma->sc_esp = esc;
} else {
/*
* find the DMA by poking around the dma device structures
*
* What happens here is that if the dma driver has not been
* configured, then this returns a NULL pointer. Then when the
* dma actually gets configured, it does the opposing test, and
* if the sc->sc_esp field in it's softc is NULL, then tries to
* find the matching esp driver.
*/
esc->sc_dma = (struct dma_softc *)
getdevunit("dma", sc->sc_dev.dv_unit);
/*
* and a back pointer to us, for DMA
*/
if (esc->sc_dma)
esc->sc_dma->sc_esp = esc;
else {
printf("\n");
panic("espattach: no dma found");
}
}
/*
* 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...
*/
/*
* It is necessary to try to load the 2nd config register here,
* to find out what rev the esp chip is, else the ncr53c9x_reset
* will not set up the defaults correctly.
*/
sc->sc_cfg1 = sc->sc_id | NCRCFG1_PARENB;
sc->sc_cfg2 = NCRCFG2_SCSI2 | NCRCFG2_RPE;
sc->sc_cfg3 = NCRCFG3_CDB;
NCR_WRITE_REG(sc, NCR_CFG2, sc->sc_cfg2);
if ((NCR_READ_REG(sc, NCR_CFG2) & ~NCRCFG2_RSVD) !=
(NCRCFG2_SCSI2 | NCRCFG2_RPE)) {
sc->sc_rev = NCR_VARIANT_ESP100;
} else {
sc->sc_cfg2 = NCRCFG2_SCSI2;
NCR_WRITE_REG(sc, NCR_CFG2, sc->sc_cfg2);
sc->sc_cfg3 = 0;
NCR_WRITE_REG(sc, NCR_CFG3, sc->sc_cfg3);
sc->sc_cfg3 = (NCRCFG3_CDB | NCRCFG3_FCLK);
NCR_WRITE_REG(sc, NCR_CFG3, sc->sc_cfg3);
if (NCR_READ_REG(sc, NCR_CFG3) !=
(NCRCFG3_CDB | NCRCFG3_FCLK)) {
sc->sc_rev = NCR_VARIANT_ESP100A;
} else {
/* NCRCFG2_FE enables > 64K transfers */
sc->sc_cfg2 |= NCRCFG2_FE;
sc->sc_cfg3 = 0;
NCR_WRITE_REG(sc, NCR_CFG3, sc->sc_cfg3);
sc->sc_rev = NCR_VARIANT_ESP200;
}
}
/*
* 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;
/*
* Alas, we must now modify the value a bit, because it's
* only valid when can switch on FASTCLK and FASTSCSI bits
* in config register 3...
*/
switch (sc->sc_rev) {
case NCR_VARIANT_ESP100:
sc->sc_maxxfer = 64 * 1024;
sc->sc_minsync = 0; /* No synch on old chip? */
break;
case NCR_VARIANT_ESP100A:
sc->sc_maxxfer = 64 * 1024;
/* Min clocks/byte is 5 */
sc->sc_minsync = ncr53c9x_cpb2stp(sc, 5);
break;
case NCR_VARIANT_ESP200:
sc->sc_maxxfer = 16 * 1024 * 1024;
/* XXX - do actually set FAST* bits */
break;
}
/* add me to the sbus structures */
esc->sc_sd.sd_reset = (void *) ncr53c9x_reset;
#if defined(SUN4C) || defined(SUN4M)
if (ca->ca_bustype == BUS_SBUS) {
if (dmachild)
sbus_establish(&esc->sc_sd, sc->sc_dev.dv_parent);
else
sbus_establish(&esc->sc_sd, &sc->sc_dev);
}
#endif /* SUN4C || SUN4M */
/* and the interuppts */
esc->sc_ih.ih_fun = (void *) ncr53c9x_intr;
esc->sc_ih.ih_arg = sc;
intr_establish(esc->sc_pri, &esc->sc_ih);
evcnt_attach(&sc->sc_dev, "intr", &sc->sc_intrcnt);
/*
* If the boot path is "esp" at the moment and it's me, then
* walk our pointer to the sub-device, ready for the config
* below.
*/
bp = ca->ca_ra.ra_bp;
switch (ca->ca_bustype) {
case BUS_SBUS:
if (bp != NULL && strcmp(bp->name, "esp") == 0 &&
SAME_ESP(sc, bp, ca))
bootpath_store(1, bp + 1);
break;
default:
if (bp != NULL && strcmp(bp->name, "esp") == 0 &&
bp->val[0] == -1 && bp->val[1] == sc->sc_dev.dv_unit)
bootpath_store(1, bp + 1);
break;
}
/* Do the common parts of attachment. */
ncr53c9x_attach(sc, &esp_switch, &esp_dev);
/* Turn on target selection using the `dma' method */
ncr53c9x_dmaselect = 1;
bootpath_store(1, NULL);
}
/*
* Glue functions.
*/
u_char
esp_read_reg(sc, reg)
struct ncr53c9x_softc *sc;
int reg;
{
struct esp_softc *esc = (struct esp_softc *)sc;
return (esc->sc_reg[reg * 4]);
}
void
esp_write_reg(sc, reg, val)
struct ncr53c9x_softc *sc;
int reg;
u_char val;
{
struct esp_softc *esc = (struct esp_softc *)sc;
u_char v = val;
esc->sc_reg[reg * 4] = v;
}
int
esp_dma_isintr(sc)
struct ncr53c9x_softc *sc;
{
struct esp_softc *esc = (struct esp_softc *)sc;
return (DMA_ISINTR(esc->sc_dma));
}
void
esp_dma_reset(sc)
struct ncr53c9x_softc *sc;
{
struct esp_softc *esc = (struct esp_softc *)sc;
DMA_RESET(esc->sc_dma);
}
int
esp_dma_intr(sc)
struct ncr53c9x_softc *sc;
{
struct esp_softc *esc = (struct esp_softc *)sc;
return (DMA_INTR(esc->sc_dma));
}
int
esp_dma_setup(sc, addr, len, datain, dmasize)
struct ncr53c9x_softc *sc;
caddr_t *addr;
size_t *len;
int datain;
size_t *dmasize;
{
struct esp_softc *esc = (struct esp_softc *)sc;
return (DMA_SETUP(esc->sc_dma, addr, len, datain, dmasize));
}
void
esp_dma_go(sc)
struct ncr53c9x_softc *sc;
{
struct esp_softc *esc = (struct esp_softc *)sc;
DMA_GO(esc->sc_dma);
}
void
esp_dma_stop(sc)
struct ncr53c9x_softc *sc;
{
struct esp_softc *esc = (struct esp_softc *)sc;
DMACSR(esc->sc_dma) &= ~D_EN_DMA;
}
int
esp_dma_isactive(sc)
struct ncr53c9x_softc *sc;
{
struct esp_softc *esc = (struct esp_softc *)sc;
return (DMA_ISACTIVE(esc->sc_dma));
}