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NetBSD/sys/dev/isa/nca.c

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/* $NetBSD: nca.c,v 1.2 1998/10/25 23:48:30 scottr Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by John M. Ruschmeyer.
*
* 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.
*/
/*
* FreeBSD generic NCR-5380/NCR-53C400 SCSI driver
*
* Copyright (C) 1994 Serge Vakulenko (vak@cronyx.ru)
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``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 DEVELOPERS 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/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/scsi_all.h>
#include <dev/scsipi/scsipi_all.h>
#include <dev/scsipi/scsiconf.h>
#include <dev/isa/isavar.h>
#include <dev/isa/isadmavar.h>
#include <dev/ic/ncr5380reg.h>
#include <dev/ic/ncr5380var.h>
#include <dev/isa/ncareg.h>
#include <dev/isa/ncavar.h>
int nca_find __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, struct nca_probe_data*));
int nca_match __P((struct device *, struct cfdata *, void *));
void nca_attach __P((struct device *, struct device *, void *));
int nca_test __P((bus_space_tag_t, bus_space_handle_t, bus_size_t));
struct cfattach nca_ca = {
sizeof(struct nca_softc), nca_match, nca_attach
};
struct scsipi_adapter nca_switch = {
ncr5380_scsi_cmd,
minphys, /* no special minphys */
NULL,
};
struct scsipi_device nca_dev = {
NULL, /* Use default error handler */
NULL, /* have a queue, served by this */
NULL, /* have no async handler */
NULL, /* Use default 'done' routine */
};
/* Supported controller types */
#define MAX_NCA_CONTROLLER 3
#define CTLR_NCR_5380 1
#define CTLR_NCR_53C400 2
#define CTLR_PAS16 3
#define NCA_ISA_IOSIZE 16
#define MIN_DMA_LEN 128
/* Options for disconnect/reselect, DMA, and interrupts. */
#define NCA_NO_DISCONNECT 0xff
#define NCA_NO_PARITY_CHK 0xff00
#define NCA_FORCE_POLLING 0x10000
#define NCA_DISABLE_DMA 0x20000
/*
* Initialization and test function used by nca_find()
*/
int
nca_test(iot, ioh, reg_offset)
bus_space_tag_t iot;
bus_space_handle_t ioh;
bus_size_t reg_offset;
{
/* Reset the SCSI bus. */
bus_space_write_1(iot, ioh, reg_offset + C80_ICR, SCI_ICMD_RST);
bus_space_write_1(iot, ioh, reg_offset + C80_ODR, 0);
/* Hold reset for at least 25 microseconds. */
delay(500);
/* Check that status cleared. */
if (bus_space_read_1(iot, ioh, reg_offset + C80_CSBR) != SCI_BUS_RST) {
#ifdef DEBUG
printf("nca_find: reset status not cleared [0x%x]\n",
bus_space_read_1(iot, ioh, reg_offset+C80_CSBR));
#endif
bus_space_write_1(iot, ioh, reg_offset+C80_ICR, 0);
return 0;
}
/* Clear reset. */
bus_space_write_1(iot, ioh, reg_offset + C80_ICR, 0);
/* Wait a Bus Clear Delay (800 ns + bus free delay 800 ns). */
delay(16000);
/* Read RPI port, resetting parity/interrupt state. */
bus_space_read_1(iot, ioh, reg_offset + C80_RPIR);
/* Test BSR: parity error, interrupt request and busy loss state
* should be cleared. */
if (bus_space_read_1(iot, ioh, reg_offset + C80_BSR) & (SCI_CSR_PERR |
SCI_CSR_INT | SCI_CSR_DISC)) {
#ifdef DEBUG
printf("nca_find: Parity/Interrupt/Busy not cleared [0x%x]\n",
bus_space_read_1(iot, ioh, reg_offset+C80_BSR));
#endif
return 0;
}
/* We must have found one */
return 1;
}
/*
* Look for the board
*/
int
nca_find(iot, ioh, max_offset, epd)
bus_space_tag_t iot;
bus_space_handle_t ioh;
bus_size_t max_offset;
struct nca_probe_data *epd;
{
/*
* We check for the existence of a board by trying to initialize it,
* Then sending the commands to reset the SCSI bus.
* (Unfortunately, this duplicates code which is already in the MI
* driver. Unavoidable as that code is not suited to this task.)
* This is largely stolen from FreeBSD.
*/
int cont_type;
bus_size_t base_offset, reg_offset = 0;
/*
* Some notes:
* In the case of a port-mapped board, we should be pointing
* right at the chip registers (if they are there at all).
* For a memory-mapped card, we loop through the 16K paragraph,
* 8 bytes at a time, until we either find it or run out
* of region. This means we will probably be doing things like
* trying to write to ROMS, etc. Hopefully, this is not a problem.
*/
for (base_offset = 0; base_offset < max_offset; base_offset += 0x08) {
#ifdef DEBUG
printf("nca_find: testing offset 0x%x\n", (int)base_offset);
#endif
/* See if anything is there */
if (bus_space_read_1(iot, ioh, base_offset) == 0xff)
continue;
/* Loop around for each board type */
for (cont_type = 1; cont_type <= MAX_NCA_CONTROLLER; cont_type++) {
/* Per-controller initialization */
switch (cont_type) {
case CTLR_NCR_5380:
/* No special inits */
reg_offset = 0;
break;
case CTLR_NCR_53C400:
/* Reset into 5380-compat. mode */
bus_space_write_1(iot, ioh,
base_offset + C400_CSR,
C400_CSR_5380_ENABLE);
reg_offset = C400_5380_REG_OFFSET;
break;
case CTLR_PAS16:
/* Not currently supported */
reg_offset = 0;
cont_type = 0;
continue;
}
/* Initialize controller and bus */
if (nca_test(iot, ioh, base_offset+reg_offset)) {
epd->sc_reg_offset = base_offset;
epd->sc_host_type = cont_type;
return cont_type; /* This must be it */
}
}
}
/* If we got here, we didn't find one */
return 0;
}
/*
* See if there is anything at the config'd address.
* If so, call the real probe to see what it is.
*/
int
nca_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_tag_t memt = ia->ia_memt;
bus_space_handle_t ioh;
struct nca_probe_data epd;
int rv = 0;
/* See if we are looking for a port- or memory-mapped adapter */
if (ia->ia_iobase != -1) {
/* Port-mapped card */
if (bus_space_map(iot, ia->ia_iobase, NCA_ISA_IOSIZE, 0, &ioh))
return 0;
/* See if a 53C80/53C400 is there */
rv = nca_find(iot, ioh, 0x07, &epd);
bus_space_unmap(iot, ioh, NCA_ISA_IOSIZE);
} else {
/* Memory-mapped card */
if (bus_space_map(memt, ia->ia_maddr, 0x4000, 0, &ioh))
return 0;
/* See if a 53C80/53C400 is somewhere in this para. */
rv = nca_find(memt, ioh, 0x03ff0, &epd);
bus_space_unmap(memt, ioh, 0x04000);
}
/* Adjust the attachment args if we found one */
if (rv) {
if (ia->ia_iobase != -1) {
/* Port-mapped */
ia->ia_iosize = NCA_ISA_IOSIZE;
} else {
/* Memory-mapped */
ia->ia_maddr += epd.sc_reg_offset;
ia->ia_msize = NCA_ISA_IOSIZE;
ia->ia_iosize = 0;
}
}
return rv;
}
/*
* Attach this instance, and then all the sub-devices
*/
void
nca_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct isa_attach_args *ia = aux;
struct nca_softc *esc = (void *)self;
struct ncr5380_softc *sc = &esc->sc_ncr5380;
bus_space_tag_t iot = ia->ia_iot;
bus_space_handle_t ioh;
struct nca_probe_data epd;
isa_chipset_tag_t ic = ia->ia_ic;
printf("\n");
if (ia->ia_iobase != -1) {
iot = ia->ia_iot;
if (bus_space_map(iot, ia->ia_iobase, NCA_ISA_IOSIZE, 0, &ioh)) {
printf("%s: can't map i/o space\n",
sc->sc_dev.dv_xname);
return;
}
} else {
iot = ia->ia_memt;
if (bus_space_map(iot, ia->ia_maddr, NCA_ISA_IOSIZE, 0, &ioh)) {
printf("%s: can't map mem space\n",
sc->sc_dev.dv_xname);
return;
}
}
switch (nca_find(iot, ioh, NCA_ISA_IOSIZE, &epd)) {
case 0:
/* Not found- must have gone away */
printf("%s: nca_find failed\n", sc->sc_dev.dv_xname);
return;
case CTLR_NCR_5380:
printf("%s: NCR 53C80 detected\n", sc->sc_dev.dv_xname);
sc->sci_r0 = 0;
sc->sci_r1 = 1;
sc->sci_r2 = 2;
sc->sci_r3 = 3;
sc->sci_r4 = 4;
sc->sci_r5 = 5;
sc->sci_r6 = 6;
sc->sci_r7 = 7;
break;
case CTLR_NCR_53C400:
printf("%s: NCR 53C400 detected\n", sc->sc_dev.dv_xname);
sc->sci_r0 = C400_5380_REG_OFFSET + 0;
sc->sci_r1 = C400_5380_REG_OFFSET + 1;
sc->sci_r2 = C400_5380_REG_OFFSET + 2;
sc->sci_r3 = C400_5380_REG_OFFSET + 3;
sc->sci_r4 = C400_5380_REG_OFFSET + 4;
sc->sci_r5 = C400_5380_REG_OFFSET + 5;
sc->sci_r6 = C400_5380_REG_OFFSET + 6;
sc->sci_r7 = C400_5380_REG_OFFSET + 7;
break;
case CTLR_PAS16:
printf("%s: ProAudio Spectrum 16 detected\n", sc->sc_dev.dv_xname);
break;
}
/*
* MD function pointers used by the MI code.
*/
sc->sc_pio_out = ncr5380_pio_out;
sc->sc_pio_in = ncr5380_pio_in;
sc->sc_dma_alloc = NULL;
sc->sc_dma_free = NULL;
sc->sc_dma_setup = NULL;
sc->sc_dma_start = NULL;
sc->sc_dma_poll = NULL;
sc->sc_dma_eop = NULL;
sc->sc_dma_stop = NULL;
sc->sc_intr_on = NULL;
sc->sc_intr_off = NULL;
if (ia->ia_irq != IRQUNK) {
esc->sc_ih = isa_intr_establish(ic, ia->ia_irq, IST_EDGE,
IPL_BIO, (int (*)(void *))ncr5380_intr, esc);
if (esc->sc_ih == NULL) {
printf("nca: couldn't establish interrupt\n");
return;
}
} else
sc->sc_flags |= NCR5380_FORCE_POLLING;
/*
* Support the "options" (config file flags).
* Disconnect/reselect is a per-target mask.
* Interrupts and DMA are per-controller.
*/
#if 0
esc->sc_options = 0x00000; /* no options */
#else
esc->sc_options = 0x2ffff; /* all options except force poll */
#endif
sc->sc_no_disconnect =
(esc->sc_options & NCA_NO_DISCONNECT);
sc->sc_parity_disable =
(esc->sc_options & NCA_NO_PARITY_CHK) >> 8;
if (esc->sc_options & NCA_FORCE_POLLING)
sc->sc_flags |= NCR5380_FORCE_POLLING;
#if 1 /* XXX - Temporary */
/* XXX - In case we think DMA is completely broken... */
if (esc->sc_options & NCA_DISABLE_DMA) {
/* Override this function pointer. */
sc->sc_dma_alloc = NULL;
}
#endif
sc->sc_min_dma_len = MIN_DMA_LEN;
/*
* Fill in the prototype scsi_link.
*/
sc->sc_link.scsipi_scsi.channel = SCSI_CHANNEL_ONLY_ONE;
sc->sc_link.scsipi_scsi.adapter_target = 7;
sc->sc_link.scsipi_scsi.max_target = 7;
sc->sc_link.type = BUS_SCSI;
sc->sc_link.adapter_softc = sc;
sc->sc_link.adapter = &nca_switch;
sc->sc_link.device = &nca_dev;
sc->sc_link.openings = 1;
/*
* Initialize fields used by the MI code
*/
sc->sc_regt = iot;
sc->sc_regh = ioh;
/*
* Allocate DMA handles.
*/
/*
* Initialize nca board itself.
*/
ncr5380_init(sc);
ncr5380_reset_scsibus(sc);
config_found(&(sc->sc_dev), &(sc->sc_link), scsiprint);
}
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