60530be43c
CFATTACH_DECL conversion. (Grumble.)
616 lines
17 KiB
C
616 lines
17 KiB
C
/* $NetBSD: esp_isa.c,v 1.27 2002/10/02 03:10:46 thorpej Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Charles M. Hannum and 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) 1994 Peter Galbavy
|
|
* 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!
|
|
*/
|
|
|
|
/*
|
|
* Initial m68k mac support from Allen Briggs <briggs@macbsd.com>
|
|
* (basically consisting of the match, a bit of the attach, and the
|
|
* "DMA" glue functions).
|
|
*/
|
|
|
|
/*
|
|
* Copyright (c) 1997 Eric S. Hvozda (hvozda@netcom.com)
|
|
* 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 Eric S. Hvozda.
|
|
* 4. The name of Eric S. Hvozda 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__KERNEL_RCSID(0, "$NetBSD: esp_isa.c,v 1.27 2002/10/02 03:10:46 thorpej Exp $");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/device.h>
|
|
#include <sys/buf.h>
|
|
|
|
#include <machine/bus.h>
|
|
#include <machine/intr.h>
|
|
|
|
#include <dev/scsipi/scsipi_all.h>
|
|
#include <dev/scsipi/scsi_all.h>
|
|
#include <dev/scsipi/scsiconf.h>
|
|
|
|
#include <dev/isa/isavar.h>
|
|
#include <dev/isa/isadmavar.h>
|
|
|
|
#include <dev/ic/ncr53c9xreg.h>
|
|
#include <dev/ic/ncr53c9xvar.h>
|
|
|
|
#include <dev/isa/esp_isavar.h>
|
|
|
|
int esp_isa_match __P((struct device *, struct cfdata *, void *));
|
|
void esp_isa_attach __P((struct device *, struct device *, void *));
|
|
|
|
CFATTACH_DECL(esp_isa, sizeof(struct esp_isa_softc),
|
|
esp_isa_match, esp_isa_attach, NULL, NULL);
|
|
|
|
int esp_isa_debug = 0; /* ESP_SHOWTRAC | ESP_SHOWREGS | ESP_SHOWMISC */
|
|
|
|
/*
|
|
* Functions and the switch for the MI code.
|
|
*/
|
|
u_char esp_isa_read_reg __P((struct ncr53c9x_softc *, int));
|
|
void esp_isa_write_reg __P((struct ncr53c9x_softc *, int, u_char));
|
|
int esp_isa_dma_isintr __P((struct ncr53c9x_softc *));
|
|
void esp_isa_dma_reset __P((struct ncr53c9x_softc *));
|
|
int esp_isa_dma_intr __P((struct ncr53c9x_softc *));
|
|
int esp_isa_dma_setup __P((struct ncr53c9x_softc *, caddr_t *,
|
|
size_t *, int, size_t *));
|
|
void esp_isa_dma_go __P((struct ncr53c9x_softc *));
|
|
void esp_isa_dma_stop __P((struct ncr53c9x_softc *));
|
|
int esp_isa_dma_isactive __P((struct ncr53c9x_softc *));
|
|
|
|
struct ncr53c9x_glue esp_isa_glue = {
|
|
esp_isa_read_reg,
|
|
esp_isa_write_reg,
|
|
esp_isa_dma_isintr,
|
|
esp_isa_dma_reset,
|
|
esp_isa_dma_intr,
|
|
esp_isa_dma_setup,
|
|
esp_isa_dma_go,
|
|
esp_isa_dma_stop,
|
|
esp_isa_dma_isactive,
|
|
NULL, /* gl_clear_latched_intr */
|
|
};
|
|
|
|
/*
|
|
* Look for the board
|
|
*/
|
|
int
|
|
esp_isa_find(iot, ioh, epd)
|
|
bus_space_tag_t iot;
|
|
bus_space_handle_t ioh;
|
|
struct esp_isa_probe_data *epd;
|
|
{
|
|
u_int vers;
|
|
u_int p1;
|
|
u_int p2;
|
|
u_int jmp;
|
|
|
|
ESP_TRACE(("[esp_isa_find] "));
|
|
|
|
/* reset card before we probe? */
|
|
|
|
epd->sc_cfg4 = NCRCFG4_ACTNEG;
|
|
epd->sc_cfg5 = NCRCFG5_CRS1 | NCRCFG5_AADDR | NCRCFG5_PTRINC;
|
|
|
|
/*
|
|
* Switch to the PIO regs and look for the bit pattern
|
|
* we expect...
|
|
*/
|
|
bus_space_write_1(iot, ioh, NCR_CFG5, epd->sc_cfg5);
|
|
|
|
#define SIG_MASK 0x87
|
|
#define REV_MASK 0x70
|
|
#define M1 0x02
|
|
#define M2 0x05
|
|
#define ISNCR 0x80
|
|
#define ISESP406 0x40
|
|
|
|
vers = bus_space_read_1(iot, ioh, NCR_SIGNTR);
|
|
p1 = bus_space_read_1(iot, ioh, NCR_SIGNTR) & SIG_MASK;
|
|
p2 = bus_space_read_1(iot, ioh, NCR_SIGNTR) & SIG_MASK;
|
|
|
|
ESP_MISC(("esp_isa_find: 0x%0x 0x%0x 0x%0x\n", vers, p1, p2));
|
|
|
|
if (!((p1 == M1 && p2 == M2) || (p1 == M2 && p2 == M1)))
|
|
return 0;
|
|
|
|
/* Ok, what is it? */
|
|
epd->sc_isncr = (vers & ISNCR);
|
|
epd->sc_rev = ((vers & REV_MASK) == ISESP406) ?
|
|
NCR_VARIANT_ESP406 : NCR_VARIANT_FAS408;
|
|
|
|
/* What do the jumpers tell us? */
|
|
jmp = bus_space_read_1(iot, ioh, NCR_JMP);
|
|
|
|
epd->sc_msize = (jmp & NCRJMP_ROMSZ) ? 0x4000 : 0x8000;
|
|
epd->sc_parity = jmp & NCRJMP_J2;
|
|
epd->sc_sync = jmp & NCRJMP_J4;
|
|
epd->sc_id = (jmp & NCRJMP_J3) ? 7 : 6;
|
|
switch (jmp & (NCRJMP_J0 | NCRJMP_J1)) {
|
|
case NCRJMP_J0 | NCRJMP_J1:
|
|
epd->sc_irq = 11;
|
|
break;
|
|
case NCRJMP_J0:
|
|
epd->sc_irq = 10;
|
|
break;
|
|
case NCRJMP_J1:
|
|
epd->sc_irq = 15;
|
|
break;
|
|
default:
|
|
epd->sc_irq = 12;
|
|
break;
|
|
}
|
|
|
|
bus_space_write_1(iot, ioh, NCR_CFG5, epd->sc_cfg5);
|
|
|
|
/* Try to set NCRESPCFG3_FCLK, some FAS408's don't support
|
|
* NCRESPCFG3_FCLK even though it is documented. A bad
|
|
* batch of chips perhaps?
|
|
*/
|
|
bus_space_write_1(iot, ioh, NCR_ESPCFG3,
|
|
bus_space_read_1(iot, ioh, NCR_ESPCFG3) | NCRESPCFG3_FCLK);
|
|
epd->sc_isfast = bus_space_read_1(iot, ioh, NCR_ESPCFG3)
|
|
& NCRESPCFG3_FCLK;
|
|
|
|
return 1;
|
|
}
|
|
|
|
void
|
|
esp_isa_init(esc, epd)
|
|
struct esp_isa_softc *esc;
|
|
struct esp_isa_probe_data *epd;
|
|
{
|
|
struct ncr53c9x_softc *sc = &esc->sc_ncr53c9x;
|
|
|
|
ESP_TRACE(("[esp_isa_init] "));
|
|
|
|
/*
|
|
* Set up the glue for MI code early; we use some of it here.
|
|
*/
|
|
sc->sc_glue = &esp_isa_glue;
|
|
|
|
sc->sc_rev = epd->sc_rev;
|
|
sc->sc_id = epd->sc_id;
|
|
|
|
/* If we could set NCRESPCFG3_FCLK earlier, we can really move */
|
|
sc->sc_cfg3 = NCR_READ_REG(sc, NCR_ESPCFG3);
|
|
if ((epd->sc_rev == NCR_VARIANT_FAS408) && epd->sc_isfast) {
|
|
sc->sc_freq = 40;
|
|
sc->sc_cfg3 |= NCRESPCFG3_FCLK;
|
|
} else
|
|
sc->sc_freq = 24;
|
|
|
|
/* Setup the register defaults */
|
|
sc->sc_cfg1 = sc->sc_id;
|
|
if (epd->sc_parity)
|
|
sc->sc_cfg1 |= NCRCFG1_PARENB;
|
|
sc->sc_cfg2 = NCRCFG2_SCSI2;
|
|
sc->sc_cfg3 |= NCRESPCFG3_IDM | NCRESPCFG3_FSCSI;
|
|
sc->sc_cfg4 = epd->sc_cfg4;
|
|
sc->sc_cfg5 = epd->sc_cfg5;
|
|
|
|
/*
|
|
* 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
|
|
*/
|
|
if (epd->sc_sync)
|
|
{
|
|
#ifdef DIAGNOSTIC
|
|
printf("%s: sync requested, but not supported; will do async\n",
|
|
sc->sc_dev.dv_xname);
|
|
#endif
|
|
epd->sc_sync = 0;
|
|
}
|
|
|
|
sc->sc_minsync = 0;
|
|
|
|
/* Really no limit, but since we want to fit into the TCR... */
|
|
sc->sc_maxxfer = 64 * 1024;
|
|
}
|
|
|
|
/*
|
|
* Check the slots looking for a board we recognise
|
|
* If we find one, note it's address (slot) and call
|
|
* the actual probe routine to check it out.
|
|
*/
|
|
int
|
|
esp_isa_match(parent, match, aux)
|
|
struct device *parent;
|
|
struct cfdata *match;
|
|
void *aux;
|
|
{
|
|
struct isa_attach_args *ia = aux;
|
|
bus_space_tag_t iot = ia->ia_iot;
|
|
bus_space_handle_t ioh;
|
|
struct esp_isa_probe_data epd;
|
|
int rv;
|
|
|
|
if (ia->ia_nio < 1)
|
|
return (0);
|
|
if (ia->ia_nirq < 1)
|
|
return (0);
|
|
if (ia->ia_ndrq < 1)
|
|
return (0);
|
|
|
|
if (ISA_DIRECT_CONFIG(ia))
|
|
return (0);
|
|
|
|
ESP_TRACE(("[esp_isa_match] "));
|
|
|
|
if (ia->ia_io[0].ir_addr == ISACF_PORT_DEFAULT)
|
|
return 0;
|
|
|
|
if (bus_space_map(iot, ia->ia_io[0].ir_addr, ESP_ISA_IOSIZE, 0, &ioh))
|
|
return 0;
|
|
|
|
rv = esp_isa_find(iot, ioh, &epd);
|
|
|
|
bus_space_unmap(iot, ioh, ESP_ISA_IOSIZE);
|
|
|
|
if (rv) {
|
|
if (ia->ia_irq[0].ir_irq != ISACF_IRQ_DEFAULT &&
|
|
ia->ia_irq[0].ir_irq != epd.sc_irq) {
|
|
#ifdef DIAGNOSTIC
|
|
printf("esp_isa_match: configured IRQ (%0d) does not "
|
|
"match board IRQ (%0d), device not configured\n",
|
|
ia->ia_irq[0].ir_irq, epd.sc_irq);
|
|
#endif
|
|
return 0;
|
|
}
|
|
ia->ia_irq[0].ir_irq = epd.sc_irq;
|
|
ia->ia_iomem[0].ir_size = 0;
|
|
ia->ia_io[0].ir_size = ESP_ISA_IOSIZE;
|
|
}
|
|
return (rv);
|
|
}
|
|
|
|
/*
|
|
* Attach this instance, and then all the sub-devices
|
|
*/
|
|
void
|
|
esp_isa_attach(parent, self, aux)
|
|
struct device *parent, *self;
|
|
void *aux;
|
|
{
|
|
struct isa_attach_args *ia = aux;
|
|
struct esp_isa_softc *esc = (void *)self;
|
|
struct ncr53c9x_softc *sc = &esc->sc_ncr53c9x;
|
|
bus_space_tag_t iot = ia->ia_iot;
|
|
bus_space_handle_t ioh;
|
|
struct esp_isa_probe_data epd;
|
|
isa_chipset_tag_t ic = ia->ia_ic;
|
|
int error;
|
|
|
|
printf("\n");
|
|
ESP_TRACE(("[esp_isa_attach] "));
|
|
|
|
if (bus_space_map(iot, ia->ia_io[0].ir_addr, ESP_ISA_IOSIZE, 0, &ioh)) {
|
|
printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname);
|
|
return;
|
|
}
|
|
|
|
if (!esp_isa_find(iot, ioh, &epd)) {
|
|
printf("%s: esp_isa_find failed\n", sc->sc_dev.dv_xname);
|
|
return;
|
|
}
|
|
|
|
if (ia->ia_drq[0].ir_drq != ISACF_DRQ_DEFAULT) {
|
|
if ((error = isa_dmacascade(ic, ia->ia_drq[0].ir_drq)) != 0) {
|
|
printf("%s: unable to cascade DRQ, error = %d\n",
|
|
sc->sc_dev.dv_xname, error);
|
|
return;
|
|
}
|
|
}
|
|
|
|
esc->sc_ih = isa_intr_establish(ic, ia->ia_irq[0].ir_irq, IST_EDGE,
|
|
IPL_BIO, ncr53c9x_intr, esc);
|
|
if (esc->sc_ih == NULL) {
|
|
printf("%s: couldn't establish interrupt\n",
|
|
sc->sc_dev.dv_xname);
|
|
return;
|
|
}
|
|
|
|
esc->sc_ioh = ioh;
|
|
esc->sc_iot = iot;
|
|
esp_isa_init(esc, &epd);
|
|
|
|
printf("%s:%ssync,%sparity\n", sc->sc_dev.dv_xname,
|
|
epd.sc_sync ? " " : " no ", epd.sc_parity ? " " : " no ");
|
|
printf("%s", sc->sc_dev.dv_xname);
|
|
|
|
/*
|
|
* Now try to attach all the sub-devices
|
|
*/
|
|
sc->sc_adapter.adapt_minphys = minphys;
|
|
sc->sc_adapter.adapt_request = ncr53c9x_scsipi_request;
|
|
ncr53c9x_attach(sc);
|
|
}
|
|
|
|
/*
|
|
* Glue functions.
|
|
*/
|
|
u_char
|
|
esp_isa_read_reg(sc, reg)
|
|
struct ncr53c9x_softc *sc;
|
|
int reg;
|
|
{
|
|
struct esp_isa_softc *esc = (struct esp_isa_softc *)sc;
|
|
u_char v;
|
|
|
|
v = bus_space_read_1(esc->sc_iot, esc->sc_ioh, reg);
|
|
|
|
ESP_REGS(("[esp_isa_read_reg CRS%c 0x%02x=0x%02x] ",
|
|
(bus_space_read_1(esc->sc_iot, esc->sc_ioh, NCR_CFG4) &
|
|
NCRCFG4_CRS1) ? '1' : '0', reg, v));
|
|
|
|
return v;
|
|
}
|
|
|
|
void
|
|
esp_isa_write_reg(sc, reg, val)
|
|
struct ncr53c9x_softc *sc;
|
|
int reg;
|
|
u_char val;
|
|
{
|
|
struct esp_isa_softc *esc = (struct esp_isa_softc *)sc;
|
|
u_char v = val;
|
|
|
|
if (reg == NCR_CMD && v == (NCRCMD_TRANS|NCRCMD_DMA)) {
|
|
v = NCRCMD_TRANS;
|
|
}
|
|
|
|
ESP_REGS(("[esp_isa_write_reg CRS%c 0x%02x=0x%02x] ",
|
|
(bus_space_read_1(esc->sc_iot, esc->sc_ioh, NCR_CFG4) &
|
|
NCRCFG4_CRS1) ? '1' : '0', reg, v));
|
|
|
|
bus_space_write_1(esc->sc_iot, esc->sc_ioh, reg, v);
|
|
}
|
|
|
|
int
|
|
esp_isa_dma_isintr(sc)
|
|
struct ncr53c9x_softc *sc;
|
|
{
|
|
ESP_TRACE(("[esp_isa_dma_isintr] "));
|
|
|
|
return NCR_READ_REG(sc, NCR_STAT) & NCRSTAT_INT;
|
|
}
|
|
|
|
void
|
|
esp_isa_dma_reset(sc)
|
|
struct ncr53c9x_softc *sc;
|
|
{
|
|
struct esp_isa_softc *esc = (struct esp_isa_softc *)sc;
|
|
|
|
ESP_TRACE(("[esp_isa_dma_reset] "));
|
|
|
|
esc->sc_active = 0;
|
|
esc->sc_tc = 0;
|
|
}
|
|
|
|
int
|
|
esp_isa_dma_intr(sc)
|
|
struct ncr53c9x_softc *sc;
|
|
{
|
|
struct esp_isa_softc *esc = (struct esp_isa_softc *)sc;
|
|
u_char *p;
|
|
u_int espphase, espstat, espintr;
|
|
int cnt;
|
|
|
|
ESP_TRACE(("[esp_isa_dma_intr] "));
|
|
|
|
if (esc->sc_active == 0) {
|
|
printf("%s: dma_intr--inactive DMA\n", sc->sc_dev.dv_xname);
|
|
return -1;
|
|
}
|
|
|
|
if ((sc->sc_espintr & NCRINTR_BS) == 0) {
|
|
esc->sc_active = 0;
|
|
return 0;
|
|
}
|
|
|
|
cnt = *esc->sc_pdmalen;
|
|
if (*esc->sc_pdmalen == 0) {
|
|
printf("%s: data interrupt, but no count left\n",
|
|
sc->sc_dev.dv_xname);
|
|
}
|
|
|
|
p = *esc->sc_dmaaddr;
|
|
espphase = sc->sc_phase;
|
|
espstat = (u_int) sc->sc_espstat;
|
|
espintr = (u_int) sc->sc_espintr;
|
|
do {
|
|
if (esc->sc_datain) {
|
|
*p++ = NCR_READ_REG(sc, NCR_FIFO);
|
|
cnt--;
|
|
if (espphase == DATA_IN_PHASE) {
|
|
NCR_WRITE_REG(sc, NCR_CMD, NCRCMD_TRANS);
|
|
} else {
|
|
esc->sc_active = 0;
|
|
}
|
|
} else {
|
|
if ( (espphase == DATA_OUT_PHASE)
|
|
|| (espphase == MESSAGE_OUT_PHASE)) {
|
|
NCR_WRITE_REG(sc, NCR_FIFO, *p++);
|
|
cnt--;
|
|
NCR_WRITE_REG(sc, NCR_CMD, NCRCMD_TRANS);
|
|
} else {
|
|
esc->sc_active = 0;
|
|
}
|
|
}
|
|
|
|
if (esc->sc_active) {
|
|
while (!(NCR_READ_REG(sc, NCR_STAT) & NCRSTAT_INT));
|
|
espstat = NCR_READ_REG(sc, NCR_STAT);
|
|
espintr = NCR_READ_REG(sc, NCR_INTR);
|
|
espphase = (espintr & NCRINTR_DIS)
|
|
? /* Disconnected */ BUSFREE_PHASE
|
|
: espstat & PHASE_MASK;
|
|
}
|
|
} while (esc->sc_active && espintr);
|
|
sc->sc_phase = espphase;
|
|
sc->sc_espstat = (u_char) espstat;
|
|
sc->sc_espintr = (u_char) espintr;
|
|
*esc->sc_dmaaddr = p;
|
|
*esc->sc_pdmalen = cnt;
|
|
|
|
if (*esc->sc_pdmalen == 0) {
|
|
esc->sc_tc = NCRSTAT_TC;
|
|
}
|
|
sc->sc_espstat |= esc->sc_tc;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
esp_isa_dma_setup(sc, addr, len, datain, dmasize)
|
|
struct ncr53c9x_softc *sc;
|
|
caddr_t *addr;
|
|
size_t *len;
|
|
int datain;
|
|
size_t *dmasize;
|
|
{
|
|
struct esp_isa_softc *esc = (struct esp_isa_softc *)sc;
|
|
|
|
ESP_TRACE(("[esp_isa_dma_setup] "));
|
|
|
|
esc->sc_dmaaddr = addr;
|
|
esc->sc_pdmalen = len;
|
|
esc->sc_datain = datain;
|
|
esc->sc_dmasize = *dmasize;
|
|
esc->sc_tc = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
esp_isa_dma_go(sc)
|
|
struct ncr53c9x_softc *sc;
|
|
{
|
|
struct esp_isa_softc *esc = (struct esp_isa_softc *)sc;
|
|
|
|
ESP_TRACE(("[esp_isa_dma_go] "));
|
|
|
|
esc->sc_active = 1;
|
|
}
|
|
|
|
void
|
|
esp_isa_dma_stop(sc)
|
|
struct ncr53c9x_softc *sc;
|
|
{
|
|
ESP_TRACE(("[esp_isa_dma_stop] "));
|
|
}
|
|
|
|
int
|
|
esp_isa_dma_isactive(sc)
|
|
struct ncr53c9x_softc *sc;
|
|
{
|
|
struct esp_isa_softc *esc = (struct esp_isa_softc *)sc;
|
|
|
|
ESP_TRACE(("[esp_isa_dma_isactive] "));
|
|
|
|
return esc->sc_active;
|
|
}
|