Add a DPT ISA HBA frontend, tested lightly with a PM2021A/9X. There are some
issues.
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/* $NetBSD: dpt_isa.c,v 1.1 2000/02/24 18:49:06 ad Exp $ */
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/*
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* Copyright (c) 1999, 2000 Andy Doran <ad@NetBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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/*
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* ISA front-end for DPT EATA SCSI driver.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: dpt_isa.c,v 1.1 2000/02/24 18:49:06 ad Exp $");
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <machine/bus.h>
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#include <machine/intr.h>
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#include <dev/scsipi/scsi_all.h>
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#include <dev/scsipi/scsipi_all.h>
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#include <dev/scsipi/scsiconf.h>
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#include <dev/isa/isareg.h>
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#include <dev/isa/isavar.h>
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#include <dev/isa/isadmareg.h>
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#include <dev/isa/isadmavar.h>
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#include <dev/ic/dptreg.h>
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#include <dev/ic/dptvar.h>
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#define DPT_ISA_IOSIZE 16
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#define DPT_ISA_MAXCCBS 16
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static int dpt_isa_match __P((struct device *, struct cfdata *, void *));
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static void dpt_isa_attach __P((struct device *, struct device *, void *));
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static int dpt_isa_probe __P((struct isa_attach_args *, int));
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static int dpt_isa_wait __P((bus_space_handle_t, bus_space_tag_t, u_int8_t,
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u_int8_t));
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struct cfattach dpt_isa_ca = {
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sizeof(struct dpt_softc), dpt_isa_match, dpt_isa_attach
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};
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/* Try 'less intrusive' addresses first */
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static int dpt_isa_iobases[] = { 0x230, 0x330, 0x1f0, 0x170, -1 };
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/*
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* Wait for the HBA status register to reach a specific state.
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*/
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static int
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dpt_isa_wait(ioh, iot, mask, state)
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bus_space_handle_t ioh;
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bus_space_tag_t iot;
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u_int8_t mask, state;
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{
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int ms;
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for (ms = 2000 * 10; ms; ms--) {
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if ((bus_space_read_1(iot, ioh, HA_STATUS) & mask) == state)
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return (0);
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DELAY(100);
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}
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return (-1);
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}
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/*
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* Match a supported board.
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*/
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static int
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dpt_isa_match(parent, match, aux)
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struct device *parent;
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struct cfdata *match;
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void *aux;
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{
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struct isa_attach_args *ia;
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int i;
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ia = aux;
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if (ia->ia_iobase == ISACF_PORT_DEFAULT) {
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for (i = 0; dpt_isa_iobases[i] != -1; i++) {
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if (dpt_isa_probe(ia, dpt_isa_iobases[i])) {
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ia->ia_iobase = dpt_isa_iobases[i];
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return (1);
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}
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}
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} else if (dpt_isa_probe(ia, ia->ia_iobase))
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return (1);
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return (0);
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}
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/*
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* Probe for a supported board.
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*/
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static int
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dpt_isa_probe(ia, iobase)
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struct isa_attach_args *ia;
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int iobase;
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{
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struct eata_cfg ec;
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bus_space_handle_t ioh;
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bus_space_tag_t iot;
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int i, j, stat;
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u_int16_t *p;
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iot = ia->ia_iot;
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if (bus_space_map(iot, iobase, DPT_ISA_IOSIZE, 0, &ioh) != 0)
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return(0);
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/*
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* Assumuing the DPT BIOS reset the board, we shouldn't need to
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* re-do it here. The tests below should weed out non-EATA devices
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* before we start poking any registers.
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*/
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for (i = 1000; i; i--) {
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if ((bus_space_read_1(iot, ioh, HA_STATUS) & HA_ST_READY) != 0)
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break;
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DELAY(2000);
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}
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if (i == 0) {
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bus_space_unmap(iot, ioh, DPT_ISA_IOSIZE);
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return (0);
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}
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while((((stat = bus_space_read_1(iot, ioh, HA_STATUS))
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!= (HA_ST_READY|HA_ST_SEEK_COMPLETE))
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&& (stat != (HA_ST_READY|HA_ST_SEEK_COMPLETE|HA_ST_ERROR))
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&& (stat != (HA_ST_READY|HA_ST_SEEK_COMPLETE|HA_ST_ERROR|HA_ST_DRQ)))
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|| (dpt_isa_wait(ioh, iot, HA_ST_BUSY, 0))) {
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/* RAID drives still spinning up? */
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if((bus_space_read_1(iot, ioh, HA_ERROR) != 'D')
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|| (bus_space_read_1(iot, ioh, HA_ERROR + 1) != 'P')
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|| (bus_space_read_1(iot, ioh, HA_ERROR + 2) != 'T')) {
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bus_space_unmap(iot, ioh, DPT_ISA_IOSIZE);
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return (0);
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}
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}
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/*
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* At this point we can be confident that we are dealing with a DPT
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* HBA. Issue the read-config command and wait for the data to
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* appear. XXX we shouldn't be doing this with PIO, but it makes it
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* a lot easier as no DMA setup is required.
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*/
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bus_space_write_1(iot, ioh, HA_COMMAND, CP_PIO_GETCFG);
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memset(&ec, 0, sizeof(ec));
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i = ((int)&((struct eata_cfg *)0)->ec_cfglen +
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sizeof(ec.ec_cfglen)) >> 1;
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p = (u_int16_t *)&ec;
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if (dpt_isa_wait(ioh, iot, 0xFF, HA_ST_DATA_RDY)) {
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bus_space_unmap(iot, ioh, DPT_ISA_IOSIZE);
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return (0);
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}
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/* Begin reading */
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while (i--)
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*p++ = le16toh(bus_space_read_2(iot, ioh, HA_DATA));
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if ((i = ec.ec_cfglen) > (sizeof(struct eata_cfg)
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- (int)(&(((struct eata_cfg *)0L)->ec_cfglen))
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- sizeof(ec.ec_cfglen)))
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i = sizeof(struct eata_cfg)
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- (int)(&(((struct eata_cfg *)0L)->ec_cfglen))
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- sizeof(ec.ec_cfglen);
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j = i + (int)(&(((struct eata_cfg *)0L)->ec_cfglen)) +
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sizeof(ec.ec_cfglen);
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i >>= 1;
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while (i--)
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*p++ = le16toh(bus_space_read_2(iot, ioh, HA_DATA));
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/* Flush until we have read 512 bytes. */
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i = (512 - j + 1) >> 1;
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while (i--)
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le16toh(bus_space_read_2(iot, ioh, HA_DATA));
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/* Puke if we don't like the returned configuration data. */
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if ((bus_space_read_1(iot, ioh, HA_STATUS) & HA_ST_ERROR) != 0 ||
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memcmp(ec.ec_eatasig, "EATA", 4) != 0 ||
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(ec.ec_feat0 & (EC_F0_HBA_VALID | EC_F0_DMA_SUPPORTED)) !=
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(EC_F0_HBA_VALID | EC_F0_DMA_SUPPORTED)) {
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bus_space_unmap(iot, ioh, DPT_ISA_IOSIZE);
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return (0);
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}
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/*
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* Which DMA channel to use: if it was hardwired in the kernel
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* configuration, use that value. If the HBA told us, use that
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* value. Otherwise, puke.
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*/
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if (ia->ia_drq == -1) {
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int dmanum = ((ec.ec_feat1 & EC_F1_DMA_NUM_MASK) >>
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EC_F1_DMA_NUM_SHIFT);
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if ((ec.ec_feat0 & EC_F0_DMA_NUM_VALID) == 0 || dmanum > 3) {
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bus_space_unmap(iot, ioh, DPT_ISA_IOSIZE);
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return (0);
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}
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ia->ia_drq = "\0\7\6\5"[dmanum];
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}
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/*
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* Which IRQ to use: if it was hardwired in the kernel configuration,
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* use that value. Otherwise, use what the HBA told us.
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*/
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if (ia->ia_irq == -1)
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ia->ia_irq = ((ec.ec_feat1 & EC_F1_IRQ_NUM_MASK) >>
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EC_F1_IRQ_NUM_SHIFT);
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ia->ia_msize = 0;
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ia->ia_iosize = DPT_ISA_IOSIZE;
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bus_space_unmap(iot, ioh, DPT_ISA_IOSIZE);
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return (1);
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}
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/*
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* Attach a matched board.
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*/
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static void
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dpt_isa_attach(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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struct isa_attach_args *ia;
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isa_chipset_tag_t ic;
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bus_space_handle_t ioh;
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bus_space_tag_t iot;
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struct dpt_softc *sc;
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struct eata_cfg *ec;
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int error;
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ia = aux;
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sc = (struct dpt_softc *)self;
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iot = ia->ia_iot;
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ic = ia->ia_ic;
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printf(": ");
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if ((error = bus_space_map(iot, ia->ia_iobase, DPT_ISA_IOSIZE, 0,
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&ioh)) != 0) {
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printf("can't map i/o space, error = %d\n", error);
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return;
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}
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sc->sc_iot = iot;
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sc->sc_ioh = ioh;
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sc->sc_dmat = ia->ia_dmat;
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if ((error = isa_dmacascade(ic, ia->ia_drq)) != 0) {
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printf("unable to cascade DRQ, error = %d\n", error);
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return;
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}
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/* Establish the interrupt. */
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if ((sc->sc_ih = isa_intr_establish(ic, ia->ia_irq, IST_EDGE, IPL_BIO,
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dpt_intr, sc)) == NULL) {
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printf("can't establish interrupt\n");
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return;
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}
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if (dpt_readcfg(sc)) {
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printf("readcfg failed - see dpt(4)\n");
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return;
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}
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/*
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* Now attach to the bus-independent code. XXX We need to force
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* parameters that aren't filled in by some ISA boards. In
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* particular, due to the limited amount of memory we have to play
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* with for DMA, clamp the number of CCBs to 16. I don't know if
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* making the DMA map non-contigiuous would allow us to play with
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* more CCBs, but in any case that *could* cause a performance hit,
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* at least for ISA HBAs.
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*/
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ec = &sc->sc_ec;
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if (be16toh(*(int16_t *)ec->ec_queuedepth) > DPT_ISA_MAXCCBS)
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*(int16_t *)ec->ec_queuedepth = htobe16(DPT_ISA_MAXCCBS);
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if (ec->ec_maxlun == 0)
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ec->ec_maxlun = 7;
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if ((ec->ec_feat3 & EC_F3_MAX_TARGET_MASK) >> EC_F3_MAX_TARGET_SHIFT
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== 0)
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ec->ec_feat3 = (ec->ec_feat3 & ~EC_F3_MAX_TARGET_MASK) |
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(7 << EC_F3_MAX_TARGET_SHIFT);
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/* Now attach to the bus-independent code */
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dpt_init(sc, NULL);
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}
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@ -1,4 +1,4 @@
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# $NetBSD: files.isa,v 1.95 2000/01/04 06:30:04 chopps Exp $
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# $NetBSD: files.isa,v 1.96 2000/02/24 18:49:06 ad Exp $
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#
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# Config file and device description for machine-independent ISA code.
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# Included by ports that need it. Requires that the SCSI files be
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@ -102,6 +102,11 @@ file dev/isa/esp_isa.c esp_isa
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attach bha at isa with bha_isa: isadma
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file dev/isa/bha_isa.c bha_isa
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# DPT SmartCache/SmartRAID III/IV ISA family
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# device declaration in sys/conf/files
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attach dpt at isa with dpt_isa: isadma
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file dev/isa/dpt_isa.c dpt_isa
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# Seagate ST0[12] ICs
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device sea: scsi, isadma
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attach sea at isa
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