b4046cd721
o Allow for up to 3 resource I/O ranges to be given for the floppy controller, rather than just two that are allowed for now. o Make sure that we can work with either a base address of 0x3f0 or 0x3f2. o Create new inline functions to access the YE DATA's unique BDCR register. o Update pccard attachment to add the fd device. o Do some minor style(9) polishing. # I'm guessing that the fdc pccard attachment broke some time ago, since # there are a number of issues with it still.
239 lines
6.8 KiB
C
239 lines
6.8 KiB
C
/*-
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* Copyright (c) 2004 M. Warner Losh.
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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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* without modification, immediately at the beginning of the file.
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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
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* the documentation and/or other materials provided with the
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* 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 FOR
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* 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 disk 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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int
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fdc_isa_alloc_resources(device_t dev, struct fdc_data *fdc)
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{
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int nports = 6;
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fdc->fdc_dev = dev;
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fdc->rid_ioport = 0;
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fdc->rid_irq = 0;
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fdc->rid_drq = 0;
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fdc->rid_ctl = 1;
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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
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* register at 0x3f6. So, on older hardware, we use
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* 0x3f0-0x3f5 and 0x3f7. However, some BIOSs omit the
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* control port, while others start at 0x3f2. Of the latter,
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* sometimes we have two resources, other times we have one.
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* 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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*
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* The following code is generic for any value of 0x3fx :-)
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*/
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/*
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* First, allocated the main range of ports. In the best of
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* worlds, this is 4 or 6 ports. In others, well, that's
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* why this function is so complicated.
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*/
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fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT,
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&fdc->rid_ioport, 0ul, ~0ul, nports, RF_ACTIVE);
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if (fdc->res_ioport == 0) {
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device_printf(dev, "cannot allocate I/O port (%d ports)\n",
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nports);
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return (ENXIO);
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}
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fdc->portt = rman_get_bustag(fdc->res_ioport);
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fdc->porth = rman_get_bushandle(fdc->res_ioport);
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/*
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* Handle cases 4-7 above
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*/
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fdc->port_off = -(fdc->porth & 0x7);
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/*
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* Deal with case 6 and 7: FDSTS and FDSATA are in rid 1.
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*/
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if (rman_get_size(fdc->res_ioport) == 2) {
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fdc->rid_sts = 1;
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fdc->res_sts = bus_alloc_resource_any(dev, SYS_RES_IOPORT,
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&fdc->rid_sts, RF_ACTIVE);
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if (fdc->res_sts == NULL) {
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device_printf(dev, "Can't alloc rid 1");
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fdc_release_resources(fdc);
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return (ENXIO);
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}
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fdc->rid_ctl++;
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fdc->sts_off = -4;
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fdc->stst = rman_get_bustag(fdc->res_sts);
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fdc->stsh = rman_get_bushandle(fdc->res_sts);
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} else {
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fdc->res_sts = NULL;
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fdc->sts_off = fdc->port_off;
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fdc->stst = fdc->portt;
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fdc->stsh = fdc->porth;
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}
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/*
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* allocate the control port. For cases 1, 2, 5 and 7, we
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* fake it from the ioports resource. XXX IS THIS THE RIGHT THING
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* TO DO, OR SHOULD WE CREATE A NEW RID? (I think we need a new rid)
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*/
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fdc->res_ctl = bus_alloc_resource_any(dev, SYS_RES_IOPORT,
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&fdc->rid_ctl, RF_ACTIVE);
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if (fdc->res_ctl == NULL) {
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fdc->ctl_off = 7 + fdc->port_off;
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fdc->res_ctl = NULL;
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fdc->ctlt = fdc->portt;
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fdc->ctlh = fdc->porth;
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} else {
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fdc->ctl_off = 0;
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fdc->ctlt = rman_get_bustag(fdc->res_ctl);
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fdc->ctlh = rman_get_bushandle(fdc->res_ctl);
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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 == 0) {
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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 == 0) {
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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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error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids);
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if (error == 0)
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fdc->flags |= FDC_ISPNP;
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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)
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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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