FreeBSD-5.3/sys/dev/ata/ata-cbus.c
/*-
* Copyright (c) 2002 - 2004 Søren Schmidt <sos@FreeBSD.org>
* 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. 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. 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/sys/dev/ata/ata-cbus.c,v 1.13.2.1 2004/10/10 15:01:47 sos Exp $");
#include "opt_ata.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/ata.h>
#include <sys/bus.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/conf.h>
#include <sys/sema.h>
#include <sys/taskqueue.h>
#include <vm/uma.h>
#include <machine/resource.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <isa/isavar.h>
#include <dev/ata/ata-all.h>
/* local vars */
struct ata_cbus_controller {
struct resource *io;
struct resource *altio;
struct resource *bankio;
struct resource *irq;
void *ih;
void (*setmode)(struct ata_device *, int);
int (*locking)(struct ata_channel *, int);
struct mtx bank_mtx;
int current_bank;
int restart_bank;
struct {
void (*function)(void *);
void *argument;
} interrupt[2];
};
/* local prototypes */
static void ata_cbus_intr(void *);
static int ata_cbus_banking(struct ata_channel *, int);
static void ata_cbus_setmode(struct ata_device *, int);
static int
ata_cbus_probe(device_t dev)
{
struct resource *io;
int rid;
u_long tmp;
/* dont probe PnP devices */
if (isa_get_vendorid(dev))
return (ENXIO);
/* allocate the ioport range */
rid = ATA_IOADDR_RID;
io = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0,
ATA_PC98_IOSIZE, RF_ACTIVE);
if (!io)
return ENOMEM;
/* calculate & set the altport range */
rid = ATA_PC98_ALTADDR_RID;
if (bus_get_resource(dev, SYS_RES_IOPORT, rid, &tmp, &tmp)) {
bus_set_resource(dev, SYS_RES_IOPORT, rid,
rman_get_start(io)+ATA_PC98_ALTOFFSET, ATA_ALTIOSIZE);
}
/* calculate & set the bank range */
rid = ATA_PC98_BANKADDR_RID;
if (bus_get_resource(dev, SYS_RES_IOPORT, rid, &tmp, &tmp)) {
bus_set_resource(dev, SYS_RES_IOPORT, rid,
ATA_PC98_BANK, ATA_PC98_BANKIOSIZE);
}
bus_release_resource(dev, SYS_RES_IOPORT, ATA_IOADDR_RID, io);
return 0;
}
static int
ata_cbus_attach(device_t dev)
{
struct ata_cbus_controller *ctlr = device_get_softc(dev);
int rid;
/* allocate resources */
rid = ATA_IOADDR_RID;
ctlr->io = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0,
ATA_PC98_IOSIZE, RF_ACTIVE);
if (!ctlr->io)
return ENOMEM;
rid = ATA_PC98_ALTADDR_RID;
ctlr->altio =
bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
rman_get_start(ctlr->io) + ATA_PC98_ALTOFFSET, ~0,
ATA_ALTIOSIZE, RF_ACTIVE);
if (!ctlr->altio) {
bus_release_resource(dev, SYS_RES_IOPORT, ATA_IOADDR_RID, ctlr->io);
return ENOMEM;
}
rid = ATA_PC98_BANKADDR_RID;
ctlr->bankio = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
ATA_PC98_BANK, ~0,
ATA_PC98_BANKIOSIZE, RF_ACTIVE);
if (!ctlr->bankio) {
bus_release_resource(dev, SYS_RES_IOPORT, ATA_IOADDR_RID, ctlr->io);
bus_release_resource(dev, SYS_RES_IOPORT, ATA_ALTADDR_RID, ctlr->altio);
return ENOMEM;
}
rid = ATA_IRQ_RID;
if (!(ctlr->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
RF_ACTIVE | RF_SHAREABLE))) {
device_printf(dev, "unable to alloc interrupt\n");
bus_release_resource(dev, SYS_RES_IOPORT, ATA_IOADDR_RID, ctlr->io);
bus_release_resource(dev, SYS_RES_IOPORT, ATA_ALTADDR_RID, ctlr->altio);
bus_release_resource(dev, SYS_RES_IOPORT,
ATA_PC98_BANKADDR_RID, ctlr->bankio);
return ENXIO;
}
if ((bus_setup_intr(dev, ctlr->irq, ATA_INTR_FLAGS,
ata_cbus_intr, ctlr, &ctlr->ih))) {
device_printf(dev, "unable to setup interrupt\n");
bus_release_resource(dev, SYS_RES_IOPORT, ATA_IOADDR_RID, ctlr->io);
bus_release_resource(dev, SYS_RES_IOPORT, ATA_ALTADDR_RID, ctlr->altio);
bus_release_resource(dev, SYS_RES_IOPORT,
ATA_PC98_BANKADDR_RID, ctlr->bankio);
bus_release_resource(dev, SYS_RES_IOPORT, ATA_IRQ_RID, ctlr->irq);
return ENXIO;
}
mtx_init(&ctlr->bank_mtx, "ATA cbus bank lock", NULL, MTX_DEF);
ctlr->current_bank = -1;
ctlr->restart_bank = -1;
ctlr->locking = ata_cbus_banking;
ctlr->setmode = ata_cbus_setmode;;
if (!device_add_child(dev, "ata", 0))
return ENOMEM;
if (!device_add_child(dev, "ata", 1))
return ENOMEM;
return bus_generic_attach(dev);
}
static struct resource *
ata_cbus_alloc_resource(device_t dev, device_t child, int type, int *rid,
u_long start, u_long end, u_long count, u_int flags)
{
struct ata_cbus_controller *ctlr = device_get_softc(dev);
if (type == SYS_RES_IOPORT) {
switch (*rid) {
case ATA_IOADDR_RID:
return ctlr->io;
case ATA_ALTADDR_RID:
return ctlr->altio;
}
}
if (type == SYS_RES_IRQ)
return ctlr->irq;
return 0;
}
static int
ata_cbus_setup_intr(device_t dev, device_t child, struct resource *irq,
int flags, driver_intr_t *intr, void *arg,
void **cookiep)
{
struct ata_cbus_controller *controller = device_get_softc(dev);
int unit = ((struct ata_channel *)device_get_softc(child))->unit;
controller->interrupt[unit].function = intr;
controller->interrupt[unit].argument = arg;
*cookiep = controller;
return 0;
}
static int
ata_cbus_print_child(device_t dev, device_t child)
{
struct ata_channel *ch = device_get_softc(child);
int retval = 0;
retval += bus_print_child_header(dev, child);
retval += printf(" at bank %d", ch->unit);
retval += bus_print_child_footer(dev, child);
return retval;
}
static void
ata_cbus_intr(void *data)
{
struct ata_cbus_controller *ctlr = data;
struct ata_channel *ch;
int unit;
for (unit = 0; unit < 2; unit++) {
if (!(ch = ctlr->interrupt[unit].argument))
continue;
if (ch->locking(ch, ATA_LF_WHICH) == unit)
ctlr->interrupt[unit].function(ch);
}
}
static int
ata_cbus_banking(struct ata_channel *ch, int flags)
{
struct ata_cbus_controller *ctlr =
device_get_softc(device_get_parent(ch->dev));
int res;
mtx_lock(&ctlr->bank_mtx);
switch (flags) {
case ATA_LF_LOCK:
if (ctlr->current_bank == -1)
ctlr->current_bank = ch->unit;
if (ctlr->current_bank == ch->unit)
ATA_OUTB(ctlr->bankio, 0, ch->unit);
else
ctlr->restart_bank = ch->unit;
break;
case ATA_LF_UNLOCK:
if (ctlr->current_bank == ch->unit) {
ctlr->current_bank = -1;
if (ctlr->restart_bank != -1) {
if (ctlr->interrupt[ctlr->restart_bank].argument) {
mtx_unlock(&ctlr->bank_mtx);
ata_start(ctlr->interrupt[ctlr->restart_bank].argument);
mtx_lock(&ctlr->bank_mtx);
}
ctlr->restart_bank = -1;
}
}
break;
case ATA_LF_WHICH:
break;
}
res = ctlr->current_bank;
mtx_unlock(&ctlr->bank_mtx);
return res;
}
static void
ata_cbus_setmode(struct ata_device *atadev, int mode)
{
atadev->mode = ata_limit_mode(atadev, mode, ATA_PIO_MAX);
}
static device_method_t ata_cbus_methods[] = {
/* device_interface */
DEVMETHOD(device_probe, ata_cbus_probe),
DEVMETHOD(device_attach, ata_cbus_attach),
/* bus methods */
DEVMETHOD(bus_alloc_resource, ata_cbus_alloc_resource),
DEVMETHOD(bus_setup_intr, ata_cbus_setup_intr),
DEVMETHOD(bus_print_child, ata_cbus_print_child),
{ 0, 0 }
};
static driver_t ata_cbus_driver = {
"atacbus",
ata_cbus_methods,
sizeof(struct ata_cbus_controller),
};
static devclass_t ata_cbus_devclass;
DRIVER_MODULE(atacbus, isa, ata_cbus_driver, ata_cbus_devclass, 0, 0);
static int
ata_cbussub_probe(device_t dev)
{
struct ata_cbus_controller *ctlr = device_get_softc(device_get_parent(dev));
struct ata_channel *ch = device_get_softc(dev);
device_t *children;
int count, i;
/* find channel number on this controller */
device_get_children(device_get_parent(dev), &children, &count);
for (i = 0; i < count; i++) {
if (children[i] == dev)
ch->unit = i;
}
free(children, M_TEMP);
/* setup the resource vectors */
for (i = ATA_DATA; i <= ATA_STATUS; i ++) {
ch->r_io[i].res = ctlr->io;
ch->r_io[i].offset = i << 1;
}
ch->r_io[ATA_ALTSTAT].res = ctlr->altio;
ch->r_io[ATA_ALTSTAT].offset = 0;
/* initialize softc for this channel */
ch->flags |= ATA_USE_16BIT | ATA_USE_PC98GEOM;
ch->locking = ctlr->locking;
ch->device[MASTER].setmode = ctlr->setmode;
ch->device[SLAVE].setmode = ctlr->setmode;
ata_generic_hw(ch);
return ata_probe(dev);
}
static device_method_t ata_cbussub_methods[] = {
/* device interface */
DEVMETHOD(device_probe, ata_cbussub_probe),
DEVMETHOD(device_attach, ata_attach),
DEVMETHOD(device_detach, ata_detach),
DEVMETHOD(device_resume, ata_resume),
{ 0, 0 }
};
static driver_t ata_cbussub_driver = {
"ata",
ata_cbussub_methods,
sizeof(struct ata_channel),
};
DRIVER_MODULE(ata, atacbus, ata_cbussub_driver, ata_devclass, 0, 0);