f86e60008b
o Remove All Rights Reserved from my notices o imp@FreeBSD.org everywhere o regularize punctiation, eliminate date ranges o Make sure that it's clear that I don't claim All Rights reserved by listing All Rights Reserved on same line as other copyright holders (but not me). Other such holders are also listed last where it's clear.
227 lines
6.5 KiB
C
227 lines
6.5 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2004-2005 M. Warner Losh <imp@FreeBSD.org>
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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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/bio.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/module.h>
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#include <sys/mutex.h>
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#include <sys/rman.h>
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#include <sys/systm.h>
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#include <machine/bus.h>
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#include <dev/fdc/fdcvar.h>
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#include <isa/isavar.h>
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#include <isa/isareg.h>
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static int fdc_isa_probe(device_t);
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static struct isa_pnp_id fdc_ids[] = {
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{0x0007d041, "PC standard floppy controller"}, /* PNP0700 */
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{0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */
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{0}
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};
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/*
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* On standard ISA, we don't just use an 8 port range
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* (e.g. 0x3f0-0x3f7) since that covers an IDE control register at
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* 0x3f6. So, on older hardware, we use 0x3f0-0x3f5 and 0x3f7.
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* However, some BIOSs omit the control port, while others start at
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* 0x3f2. Of the latter, sometimes we have two resources, other times
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* we have one. We have to deal with the following cases:
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*
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* 1: 0x3f0-0x3f5 # very rare
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* 2: 0x3f0 # hints -> 0x3f0-0x3f5,0x3f7
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* 3: 0x3f0-0x3f5,0x3f7 # Most common
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* 4: 0x3f2-0x3f5,0x3f7 # Second most common
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* 5: 0x3f2-0x3f5 # implies 0x3f7 too.
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* 6: 0x3f2-0x3f3,0x3f4-0x3f5,0x3f7 # becoming common
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* 7: 0x3f2-0x3f3,0x3f4-0x3f5 # rare
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* 8: 0x3f0-0x3f1,0x3f2-0x3f3,0x3f4-0x3f5,0x3f7
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* 9: 0x3f0-0x3f3,0x3f4-0x3f5,0x3f7
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*
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* The following code is generic for any value of 0x3fx. It is also
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* generic for all the above cases, as well as cases where things are
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* even weirder.
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*/
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int
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fdc_isa_alloc_resources(device_t dev, struct fdc_data *fdc)
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{
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struct resource *res;
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int i, j, rid, newrid, nport;
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u_long port;
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fdc->fdc_dev = dev;
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rid = 0;
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for (i = 0; i < FDC_MAXREG; i++)
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fdc->resio[i] = NULL;
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nport = isa_get_logicalid(dev) ? 1 : 6;
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for (rid = 0; ; rid++) {
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newrid = rid;
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res = bus_alloc_resource_anywhere(dev, SYS_RES_IOPORT, &newrid,
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rid == 0 ? nport : 1, RF_ACTIVE);
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if (res == NULL)
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break;
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/*
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* Mask off the upper bits of the register, and sanity
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* check resource ranges.
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*/
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i = rman_get_start(res) & 0x7;
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if (i + rman_get_size(res) - 1 > FDC_MAXREG) {
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bus_release_resource(dev, SYS_RES_IOPORT, newrid, res);
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return (ENXIO);
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}
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for (j = 0; j < rman_get_size(res); j++) {
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fdc->resio[i + j] = res;
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fdc->ridio[i + j] = newrid;
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fdc->ioff[i + j] = j;
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fdc->ioh[i + j] = rman_get_bushandle(res);
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}
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}
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if (fdc->resio[2] == NULL) {
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device_printf(dev, "No FDOUT register!\n");
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return (ENXIO);
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}
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fdc->iot = rman_get_bustag(fdc->resio[2]);
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if (fdc->resio[7] == NULL) {
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port = (rman_get_start(fdc->resio[2]) & ~0x7) + 7;
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newrid = rid;
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res = bus_alloc_resource(dev, SYS_RES_IOPORT, &newrid, port,
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port, 1, RF_ACTIVE);
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if (res == NULL) {
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device_printf(dev, "Faking up FDCTL\n");
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fdc->resio[7] = fdc->resio[2];
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fdc->ridio[7] = fdc->ridio[2];
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fdc->ioff[7] = fdc->ioff[2] + 5;
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fdc->ioh[7] = fdc->ioh[2];
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} else {
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fdc->resio[7] = res;
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fdc->ridio[7] = newrid;
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fdc->ioff[7] = rman_get_start(res) & 7;
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fdc->ioh[7] = rman_get_bushandle(res);
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}
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}
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fdc->res_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &fdc->rid_irq,
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RF_ACTIVE | RF_SHAREABLE);
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if (fdc->res_irq == NULL) {
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device_printf(dev, "cannot reserve interrupt line\n");
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return (ENXIO);
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}
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if ((fdc->flags & FDC_NODMA) == 0) {
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fdc->res_drq = bus_alloc_resource_any(dev, SYS_RES_DRQ,
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&fdc->rid_drq, RF_ACTIVE | RF_SHAREABLE);
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if (fdc->res_drq == NULL) {
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device_printf(dev, "cannot reserve DMA request line\n");
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/* This is broken and doesn't work for ISA case */
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fdc->flags |= FDC_NODMA;
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} else
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fdc->dmachan = rman_get_start(fdc->res_drq);
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}
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return (0);
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}
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static int
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fdc_isa_probe(device_t dev)
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{
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int error;
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struct fdc_data *fdc;
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fdc = device_get_softc(dev);
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fdc->fdc_dev = dev;
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/* Check pnp ids */
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error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids);
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if (error == ENXIO)
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return (ENXIO);
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/* Attempt to allocate our resources for the duration of the probe */
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error = fdc_isa_alloc_resources(dev, fdc);
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if (error == 0)
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error = fdc_initial_reset(dev, fdc);
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fdc_release_resources(fdc);
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return (error);
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}
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static int
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fdc_isa_attach(device_t dev)
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{
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struct fdc_data *fdc;
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int error;
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fdc = device_get_softc(dev);
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fdc->fdc_dev = dev;
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error = fdc_isa_alloc_resources(dev, fdc);
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if (error == 0)
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error = fdc_attach(dev);
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if (error == 0)
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error = fdc_hints_probe(dev);
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if (error == 0)
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fdc_start_worker(dev);
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else
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fdc_release_resources(fdc);
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return (error);
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}
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static device_method_t fdc_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, fdc_isa_probe),
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DEVMETHOD(device_attach, fdc_isa_attach),
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DEVMETHOD(device_detach, fdc_detach),
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DEVMETHOD(device_shutdown, bus_generic_shutdown),
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DEVMETHOD(device_suspend, bus_generic_suspend),
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DEVMETHOD(device_resume, bus_generic_resume),
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/* Bus interface */
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DEVMETHOD(bus_print_child, fdc_print_child),
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DEVMETHOD(bus_read_ivar, fdc_read_ivar),
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DEVMETHOD(bus_write_ivar, fdc_write_ivar),
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/* Our children never use any other bus interface methods. */
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{ 0, 0 }
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};
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static driver_t fdc_driver = {
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"fdc",
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fdc_methods,
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sizeof(struct fdc_data)
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};
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DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0);
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ISA_PNP_INFO(fdc_ids);
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