ea0652cf81
+ * 9: 0x3f0-0x3f3,0x3f4-0x3f5,0x3f7 This requires only one change to support. Rather than keying on the size of the resource being 2, instead key off the end & 7 being 3. This covers the same cases that the size of 2 would catch, but also covers the new above case. In addition, I think it is clearer to use the end in preference to the size and start for case #8 as well. Turns two tests into one, and catches no other cases. Make minor commentary changes to deal with new case #9. # This change is specifically minimal to allow easy MFC. A more # extensive change will go into current once I've had a chance to test # it on a lot of hardware...
245 lines
7.0 KiB
C
245 lines
7.0 KiB
C
/*-
|
|
* Copyright (c) 2004 M. Warner Losh.
|
|
* 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.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/bio.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/module.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/rman.h>
|
|
#include <sys/systm.h>
|
|
|
|
#include <machine/bus.h>
|
|
|
|
#include <dev/fdc/fdcvar.h>
|
|
|
|
#include <isa/isavar.h>
|
|
#include <isa/isareg.h>
|
|
|
|
static int fdc_isa_probe(device_t);
|
|
|
|
static struct isa_pnp_id fdc_ids[] = {
|
|
{0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */
|
|
{0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */
|
|
{0}
|
|
};
|
|
|
|
int
|
|
fdc_isa_alloc_resources(device_t dev, struct fdc_data *fdc)
|
|
{
|
|
int nports = 6;
|
|
|
|
fdc->fdc_dev = dev;
|
|
fdc->rid_ioport = 0;
|
|
fdc->rid_irq = 0;
|
|
fdc->rid_drq = 0;
|
|
fdc->rid_ctl = 1;
|
|
|
|
/*
|
|
* On standard ISA, we don't just use an 8 port range
|
|
* (e.g. 0x3f0-0x3f7) since that covers an IDE control
|
|
* register at 0x3f6. So, on older hardware, we use
|
|
* 0x3f0-0x3f5 and 0x3f7. However, some BIOSs omit the
|
|
* control port, while others start at 0x3f2. Of the latter,
|
|
* sometimes we have two resources, other times we have one.
|
|
* We have to deal with the following cases:
|
|
*
|
|
* 1: 0x3f0-0x3f5 # very rare
|
|
* 2: 0x3f0 # hints -> 0x3f0-0x3f5,0x3f7
|
|
* 3: 0x3f0-0x3f5,0x3f7 # Most common
|
|
* 4: 0x3f2-0x3f5,0x3f7 # Second most common
|
|
* 5: 0x3f2-0x3f5 # implies 0x3f7 too.
|
|
* 6: 0x3f2-0x3f3,0x3f4-0x3f5,0x3f7 # becoming common
|
|
* 7: 0x3f2-0x3f3,0x3f4-0x3f5 # rare
|
|
* 8: 0x3f0-0x3f1,0x3f2-0x3f3,0x3f4-0x3f5,0x3f7
|
|
* 9: 0x3f0-0x3f3,0x3f4-0x3f5,0x3f7
|
|
*
|
|
* The following code is generic for any value of 0x3fx :-)
|
|
*/
|
|
|
|
/*
|
|
* First, allocated the main range of ports. In the best of
|
|
* worlds, this is 4 or 6 ports. In others, well, that's
|
|
* why this function is so complicated.
|
|
*/
|
|
again_ioport:
|
|
fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT,
|
|
&fdc->rid_ioport, 0ul, ~0ul, nports, RF_ACTIVE);
|
|
if (fdc->res_ioport == 0) {
|
|
device_printf(dev, "cannot allocate I/O port (%d ports)\n",
|
|
nports);
|
|
return (ENXIO);
|
|
}
|
|
if ((rman_get_end(fdc->res_ioport) & 0x7) == 1) {
|
|
/* Case 8 */
|
|
bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
|
|
fdc->res_ioport);
|
|
fdc->rid_ioport++;
|
|
goto again_ioport;
|
|
}
|
|
fdc->portt = rman_get_bustag(fdc->res_ioport);
|
|
fdc->porth = rman_get_bushandle(fdc->res_ioport);
|
|
|
|
/*
|
|
* Handle cases 4-8 above
|
|
*/
|
|
fdc->port_off = -(fdc->porth & 0x7);
|
|
|
|
/*
|
|
* Deal with case 6-9: FDSTS and FDDATA.
|
|
*/
|
|
if ((rman_get_end(fdc->res_ioport) & 0x7) == 3) {
|
|
fdc->rid_sts = fdc->rid_ioport + 1;
|
|
fdc->res_sts = bus_alloc_resource_any(dev, SYS_RES_IOPORT,
|
|
&fdc->rid_sts, RF_ACTIVE);
|
|
if (fdc->res_sts == NULL) {
|
|
device_printf(dev, "Can't alloc rid 1");
|
|
fdc_release_resources(fdc);
|
|
return (ENXIO);
|
|
}
|
|
fdc->sts_off = -4;
|
|
fdc->stst = rman_get_bustag(fdc->res_sts);
|
|
fdc->stsh = rman_get_bushandle(fdc->res_sts);
|
|
} else {
|
|
fdc->res_sts = NULL;
|
|
fdc->sts_off = fdc->port_off;
|
|
fdc->stst = fdc->portt;
|
|
fdc->stsh = fdc->porth;
|
|
}
|
|
|
|
/*
|
|
* allocate the control port. For cases 1, 2, 5 and 7, we
|
|
* fake it from the ioports resource. XXX IS THIS THE RIGHT THING
|
|
* TO DO, OR SHOULD WE CREATE A NEW RID? (I think we need a new rid)
|
|
*/
|
|
fdc->rid_ctl = fdc->rid_sts + 1;
|
|
fdc->res_ctl = bus_alloc_resource_any(dev, SYS_RES_IOPORT,
|
|
&fdc->rid_ctl, RF_ACTIVE);
|
|
if (fdc->res_ctl == NULL) {
|
|
fdc->ctl_off = 7 + fdc->port_off;
|
|
fdc->res_ctl = NULL;
|
|
fdc->ctlt = fdc->portt;
|
|
fdc->ctlh = fdc->porth;
|
|
} else {
|
|
fdc->ctl_off = 0;
|
|
fdc->ctlt = rman_get_bustag(fdc->res_ctl);
|
|
fdc->ctlh = rman_get_bushandle(fdc->res_ctl);
|
|
}
|
|
|
|
fdc->res_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &fdc->rid_irq,
|
|
RF_ACTIVE | RF_SHAREABLE);
|
|
if (fdc->res_irq == 0) {
|
|
device_printf(dev, "cannot reserve interrupt line\n");
|
|
return (ENXIO);
|
|
}
|
|
|
|
if ((fdc->flags & FDC_NODMA) == 0) {
|
|
fdc->res_drq = bus_alloc_resource_any(dev, SYS_RES_DRQ,
|
|
&fdc->rid_drq, RF_ACTIVE | RF_SHAREABLE);
|
|
if (fdc->res_drq == 0) {
|
|
device_printf(dev, "cannot reserve DMA request line\n");
|
|
/* This is broken and doesn't work for ISA case */
|
|
fdc->flags |= FDC_NODMA;
|
|
} else
|
|
fdc->dmachan = rman_get_start(fdc->res_drq);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
fdc_isa_probe(device_t dev)
|
|
{
|
|
int error;
|
|
struct fdc_data *fdc;
|
|
|
|
fdc = device_get_softc(dev);
|
|
fdc->fdc_dev = dev;
|
|
|
|
/* Check pnp ids */
|
|
error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids);
|
|
if (error == ENXIO)
|
|
return (ENXIO);
|
|
|
|
/* Attempt to allocate our resources for the duration of the probe */
|
|
error = fdc_isa_alloc_resources(dev, fdc);
|
|
if (error == 0)
|
|
error = fdc_initial_reset(dev, fdc);
|
|
|
|
fdc_release_resources(fdc);
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
fdc_isa_attach(device_t dev)
|
|
{
|
|
struct fdc_data *fdc;
|
|
int error;
|
|
|
|
fdc = device_get_softc(dev);
|
|
error = fdc_isa_alloc_resources(dev, fdc);
|
|
if (error == 0)
|
|
error = fdc_attach(dev);
|
|
if (error == 0)
|
|
error = fdc_hints_probe(dev);
|
|
if (error)
|
|
fdc_release_resources(fdc);
|
|
return (error);
|
|
}
|
|
|
|
static device_method_t fdc_methods[] = {
|
|
/* Device interface */
|
|
DEVMETHOD(device_probe, fdc_isa_probe),
|
|
DEVMETHOD(device_attach, fdc_isa_attach),
|
|
DEVMETHOD(device_detach, fdc_detach),
|
|
DEVMETHOD(device_shutdown, bus_generic_shutdown),
|
|
DEVMETHOD(device_suspend, bus_generic_suspend),
|
|
DEVMETHOD(device_resume, bus_generic_resume),
|
|
|
|
/* Bus interface */
|
|
DEVMETHOD(bus_print_child, fdc_print_child),
|
|
DEVMETHOD(bus_read_ivar, fdc_read_ivar),
|
|
DEVMETHOD(bus_write_ivar, fdc_write_ivar),
|
|
/* Our children never use any other bus interface methods. */
|
|
|
|
{ 0, 0 }
|
|
};
|
|
|
|
static driver_t fdc_driver = {
|
|
"fdc",
|
|
fdc_methods,
|
|
sizeof(struct fdc_data)
|
|
};
|
|
|
|
DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0);
|