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fdc.c
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fdc_acpi.c
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fdc_isa.c
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fdcvar.h
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Editing: fdc_isa.c
/*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (c) 2004-2005 M. Warner Losh <imp@FreeBSD.org> * * 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 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 controller"}, /* PNP0700 */ {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */ {0} }; /* * 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. It is also * generic for all the above cases, as well as cases where things are * even weirder. */ int fdc_isa_alloc_resources(device_t dev, struct fdc_data *fdc) { struct resource *res; int i, j, rid, newrid, nport; u_long port; fdc->fdc_dev = dev; rid = 0; for (i = 0; i < FDC_MAXREG; i++) fdc->resio[i] = NULL; nport = isa_get_logicalid(dev) ? 1 : 6; for (rid = 0; ; rid++) { newrid = rid; res = bus_alloc_resource_anywhere(dev, SYS_RES_IOPORT, &newrid, rid == 0 ? nport : 1, RF_ACTIVE); if (res == NULL) break; /* * Mask off the upper bits of the register, and sanity * check resource ranges. */ i = rman_get_start(res) & 0x7; if (i + rman_get_size(res) - 1 > FDC_MAXREG) { bus_release_resource(dev, SYS_RES_IOPORT, newrid, res); return (ENXIO); } for (j = 0; j < rman_get_size(res); j++) { fdc->resio[i + j] = res; fdc->ridio[i + j] = newrid; fdc->ioff[i + j] = j; fdc->ioh[i + j] = rman_get_bushandle(res); } } if (fdc->resio[2] == NULL) { device_printf(dev, "No FDOUT register!\n"); return (ENXIO); } fdc->iot = rman_get_bustag(fdc->resio[2]); if (fdc->resio[7] == NULL) { port = (rman_get_start(fdc->resio[2]) & ~0x7) + 7; newrid = rid; res = bus_alloc_resource(dev, SYS_RES_IOPORT, &newrid, port, port, 1, RF_ACTIVE); if (res == NULL) { device_printf(dev, "Faking up FDCTL\n"); fdc->resio[7] = fdc->resio[2]; fdc->ridio[7] = fdc->ridio[2]; fdc->ioff[7] = fdc->ioff[2] + 5; fdc->ioh[7] = fdc->ioh[2]; } else { fdc->resio[7] = res; fdc->ridio[7] = newrid; fdc->ioff[7] = rman_get_start(res) & 7; fdc->ioh[7] = rman_get_bushandle(res); } } fdc->res_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &fdc->rid_irq, RF_ACTIVE | RF_SHAREABLE); if (fdc->res_irq == NULL) { 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 == NULL) { 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); fdc->fdc_dev = 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 == 0) fdc_start_worker(dev); else 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); ISA_PNP_INFO(fdc_ids);
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