/* $NetBSD: cac_eisa.c,v 1.26 2021/01/27 04:35:15 thorpej Exp $ */

/* $NetBSD: cac_eisa.c,v 1.26 2021/01/27 04:35:15 thorpej Exp $ */

/*-
* Copyright (c) 2000 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Andrew Doran.
*
* 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 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) 2000 Jonathan Lemon
* Copyright (c) 1999 by Matthew N. Dodd <[email protected]>
* 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,
* without modification, immediately at the beginning of the file.
* 2. 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 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 AUTHOR 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.
*/

/*
* EISA front-end for cac(4) driver.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: cac_eisa.c,v 1.26 2021/01/27 04:35:15 thorpej Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/intr.h>

#include <dev/eisa/eisavar.h>
#include <dev/eisa/eisadevs.h>

#include <dev/ic/cacreg.h>
#include <dev/ic/cacvar.h>

#include "ioconf.h"

#define CAC_EISA_SLOT_OFFSET 0x0c88
#define CAC_EISA_IOSIZE 0x0017
#define CAC_EISA_IOCONF 0x38

static void cac_eisa_attach(device_t, device_t, void *);
static int cac_eisa_match(device_t, cfdata_t, void *);

static struct cac_ccb *cac_eisa_l0_completed(struct cac_softc *);
static int cac_eisa_l0_fifo_full(struct cac_softc *);
static void cac_eisa_l0_intr_enable(struct cac_softc *, int);
static int cac_eisa_l0_intr_pending(struct cac_softc *);
static void cac_eisa_l0_submit(struct cac_softc *, struct cac_ccb *);

CFATTACH_DECL3_NEW(cac_eisa, sizeof(struct cac_softc),
cac_eisa_match, cac_eisa_attach, NULL, NULL, cac_rescan, NULL, 0);

static const struct cac_linkage cac_eisa_l0 = {
cac_eisa_l0_completed,
cac_eisa_l0_fifo_full,
cac_eisa_l0_intr_enable,
cac_eisa_l0_intr_pending,
cac_eisa_l0_submit
};

struct cac_eisa_type {
const char *ct_typestr;
const struct cac_linkage *ct_linkage;
};

static const struct cac_eisa_type cpq4001 = {
.ct_typestr = "IDA",
.ct_linkage = &cac_eisa_l0
};

static const struct cac_eisa_type cpq4002 = {
.ct_typestr = "IDA-2",
.ct_linkage = &cac_eisa_l0
};

static const struct cac_eisa_type cpq4010 = {
.ct_typestr = "IEAS",
.ct_linkage = &cac_eisa_l0
};

static const struct cac_eisa_type cpq4020 = {
.ct_typestr = "SMART",
.ct_linkage = &cac_eisa_l0
};

static const struct cac_eisa_type cpq4030 = {
.ct_typestr = "SMART-2/E",
.ct_linkage = &cac_l0
};

static const struct device_compatible_entry compat_data[] = {
{ .compat = "CPQ4001", .data = &cpq4001 },
{ .compat = "CPQ4002", .data = &cpq4002 },
{ .compat = "CPQ4010", .data = &cpq4010 },
{ .compat = "CPQ4020", .data = &cpq4020 },
{ .compat = "CPQ4030", .data = &cpq4030 },
DEVICE_COMPAT_EOL
};

static int
cac_eisa_match(device_t parent, cfdata_t match, void *aux)
{
struct eisa_attach_args *ea = aux;

return (eisa_compatible_match(ea, compat_data));
}

static void
cac_eisa_attach(device_t parent, device_t self, void *aux)
{
struct eisa_attach_args *ea = aux;
const struct device_compatible_entry *dce;
const struct cac_eisa_type *ct;
bus_space_handle_t ioh;
eisa_chipset_tag_t ec;
eisa_intr_handle_t ih;
struct cac_softc *sc;
bus_space_tag_t iot;
const char *intrstr;
int irq;
char intrbuf[EISA_INTRSTR_LEN];

sc = device_private(self);
iot = ea->ea_iot;
ec = ea->ea_ec;

if (bus_space_map(iot, EISA_SLOT_ADDR(ea->ea_slot) +
CAC_EISA_SLOT_OFFSET, CAC_EISA_IOSIZE, 0, &ioh)) {
aprint_error(": can't map i/o space\n");
return;
}

dce = eisa_compatible_lookup(ea, compat_data);
KASSERT(dce != NULL);
ct = dce->data;

sc->sc_dev = self;
sc->sc_iot = iot;
sc->sc_ioh = ioh;
sc->sc_dmat = ea->ea_dmat;

/*
* Map and establish the interrupt.
*/
switch (bus_space_read_1(iot, ioh, CAC_EISA_IOCONF) & 0xf0) {
case 0x20:
irq = 10;
break;
case 0x10:
irq = 11;
break;
case 0x40:
irq = 14;
break;
case 0x80:
irq = 15;
break;
default:
aprint_error(": controller on invalid IRQ\n");
return;
}

if (eisa_intr_map(ec, irq, &ih)) {
aprint_error(": can't map interrupt (%d)\n", irq);
return;
}

intrstr = eisa_intr_string(ec, ih, intrbuf, sizeof(intrbuf));
if ((sc->sc_ih = eisa_intr_establish(ec, ih, IST_LEVEL, IPL_BIO,
cac_intr, sc)) == NULL) {
aprint_error(": can't establish interrupt");
if (intrstr != NULL)
aprint_normal(" at %s", intrstr);
aprint_normal("\n");
return;
}

/*
* Print board type and attach to the bus-independent code.
*/
aprint_normal(": Compaq %s\n", ct->ct_typestr);
memcpy(&sc->sc_cl, ct->ct_linkage, sizeof(sc->sc_cl));
cac_init(sc, intrstr, 0);
}

/*
* Linkage specific to EISA boards.
*/

static int
cac_eisa_l0_fifo_full(struct cac_softc *sc)
{

return ((cac_inb(sc, CAC_EISAREG_SYSTEM_DOORBELL) &
CAC_EISA_CHANNEL_CLEAR) == 0);
}

static void
cac_eisa_l0_submit(struct cac_softc *sc, struct cac_ccb *ccb)
{
u_int16_t size;

/*
* On these boards, `ccb_hdr.size' is actually for control flags.
* Set it to zero and pass the value by means of an I/O port.
*/
size = le16toh(ccb->ccb_hdr.size) << 2;
ccb->ccb_hdr.size = 0;

bus_dmamap_sync(sc->sc_dmat, sc->sc_dmamap,
(char *)ccb - (char *)sc->sc_ccbs,
sizeof(struct cac_ccb), BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD);

cac_outb(sc, CAC_EISAREG_SYSTEM_DOORBELL, CAC_EISA_CHANNEL_CLEAR);
cac_outl(sc, CAC_EISAREG_LIST_ADDR, ccb->ccb_paddr);
cac_outw(sc, CAC_EISAREG_LIST_LEN, size);
cac_outb(sc, CAC_EISAREG_LOCAL_DOORBELL, CAC_EISA_CHANNEL_BUSY);
}

static struct cac_ccb *
cac_eisa_l0_completed(struct cac_softc *sc)
{
struct cac_ccb *ccb;
u_int32_t off;
u_int8_t status;

if ((cac_inb(sc, CAC_EISAREG_SYSTEM_DOORBELL) &
CAC_EISA_CHANNEL_BUSY) == 0)
return (NULL);

cac_outb(sc, CAC_EISAREG_SYSTEM_DOORBELL, CAC_EISA_CHANNEL_BUSY);
off = cac_inl(sc, CAC_EISAREG_COMPLETE_ADDR);
status = cac_inb(sc, CAC_EISAREG_LIST_STATUS);
cac_outb(sc, CAC_EISAREG_LOCAL_DOORBELL, CAC_EISA_CHANNEL_CLEAR);

if (off == 0)
return (NULL);

off = (off & ~3) - sc->sc_ccbs_paddr;
ccb = (struct cac_ccb *)((char *)sc->sc_ccbs + off);

bus_dmamap_sync(sc->sc_dmat, sc->sc_dmamap, off, sizeof(struct cac_ccb),
BUS_DMASYNC_POSTWRITE | BUS_DMASYNC_POSTREAD);

ccb->ccb_req.error = status;

if ((off & 3) != 0 && ccb->ccb_req.error == 0)
ccb->ccb_req.error = CAC_RET_CMD_REJECTED;

return (ccb);
}

static int
cac_eisa_l0_intr_pending(struct cac_softc *sc)
{

return (cac_inb(sc, CAC_EISAREG_SYSTEM_DOORBELL) &
CAC_EISA_CHANNEL_BUSY);
}

static void
cac_eisa_l0_intr_enable(struct cac_softc *sc, int state)
{

if (state) {
cac_outb(sc, CAC_EISAREG_SYSTEM_DOORBELL,
~CAC_EISA_CHANNEL_CLEAR);
cac_outb(sc, CAC_EISAREG_LOCAL_DOORBELL,
CAC_EISA_CHANNEL_BUSY);
cac_outb(sc, CAC_EISAREG_INTR_MASK, CAC_INTR_ENABLE);
cac_outb(sc, CAC_EISAREG_SYSTEM_MASK, CAC_INTR_ENABLE);
} else
cac_outb(sc, CAC_EISAREG_SYSTEM_MASK, CAC_INTR_DISABLE);
}

MODULE(MODULE_CLASS_DRIVER, cac_eisa, "cac"); /* No eisa module yet! */

#ifdef _MODULE
/*
* XXX Don't allow ioconf.c to redefine the "struct cfdriver cac_cd"
* XXX it will be defined in the common-code module
*/
#undef CFDRIVER_DECL
#define CFDRIVER_DECL(name, class, attr)
#include "ioconf.c"
#endif

static int
cac_eisa_modcmd(modcmd_t cmd, void *opaque)
{
int error = 0;

#ifdef _MODULE
switch (cmd) {
case MODULE_CMD_INIT:
/*
* We skip over the first entry in cfdriver[] array
* since the cfdriver is attached by the common
* (non-attachment-specific) code.
*/
error = config_init_component(&cfdriver_ioconf_cac_eisa[1],
cfattach_ioconf_cac_eisa, cfdata_ioconf_cac_eisa);
break;
case MODULE_CMD_FINI:
error = config_fini_component(&cfdriver_ioconf_cac_eisa[1],
cfattach_ioconf_cac_eisa, cfdata_ioconf_cac_eisa);
break;
default:
error = ENOTTY;
break;
}
#endif

return error;
}