/*- * 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 __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include #include #include static int fdc_isa_probe(device_t); static void fdctl_wr_isa(fdc_p, u_int8_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} }; static void fdctl_wr_isa(fdc_p fdc, u_int8_t v) { bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v); } int fdc_isa_alloc_resources(device_t dev, struct fdc_data *fdc) { int ispnp, nports; ispnp = (fdc->flags & FDC_ISPNP) != 0; 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. * * Isn't PC hardware wonderful. */ nports = ispnp ? 1 : 6; /* * Some ACPI BIOSen have _CRS objects for the floppy device that * split the I/O port resource into several resources. We detect * this case by checking if there are more than 2 IOPORT resources. * If so, we use the resource with the smallest start address as * the port RID and the largest start address as the control RID. */ if (bus_get_resource_count(dev, SYS_RES_IOPORT, 2) != 0) { u_long min_start, max_start, tmp; int i; /* Find the min/max start addresses and their RIDs. */ max_start = 0ul; min_start = ~0ul; for (i = 0; bus_get_resource_count(dev, SYS_RES_IOPORT, i) > 0; i++) { tmp = bus_get_resource_start(dev, SYS_RES_IOPORT, i); KASSERT(tmp != 0, ("bogus resource")); if (tmp < min_start) { min_start = tmp; fdc->rid_ioport = i; } if (tmp > max_start) { max_start = tmp; fdc->rid_ctl = i; } } if (min_start + 7 != max_start) { device_printf(dev, "I/O to control range incorrect\n"); return (ENXIO); } } 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 reserve I/O port range (%d ports)\n", nports); return ENXIO; } fdc->portt = rman_get_bustag(fdc->res_ioport); fdc->porth = rman_get_bushandle(fdc->res_ioport); /* * Some BIOSen report the device at 0x3f2-0x3f5,0x3f7 * and some at 0x3f0-0x3f5,0x3f7. We detect the former * by checking the size and adjust the port address * accordingly. */ if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4) fdc->port_off = -2; /* * Register the control port range as rid 1 if it * isn't there already. Most PnP BIOSen will have * already done this but non-PnP configurations don't. * * And some (!!) report 0x3f2-0x3f5 and completely * leave out the control register! It seems that some * non-antique controller chips have a different * method of programming the transfer speed which * doesn't require the control register, but it's * mighty bogus as the chip still responds to the * address for the control register. */ if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) { u_long ctlstart; /* Find the control port, usually 0x3f7 */ ctlstart = rman_get_start(fdc->res_ioport) + fdc->port_off + 7; bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1); } /* * Now (finally!) allocate the control port. */ fdc->res_ctl = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &fdc->rid_ctl, RF_ACTIVE); if (fdc->res_ctl == 0) { device_printf(dev, "cannot reserve control I/O port range (control port)\n"); return ENXIO; } 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"); 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, ic_type; struct fdc_data *fdc; fdc = device_get_softc(dev); fdc->fdc_dev = dev; fdc->fdctl_wr = fdctl_wr_isa; /* 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) goto out; /* Check that the controller is working. */ error = fdc_initial_reset(fdc); if (error) goto out; /* Try to determine a more specific device type. */ if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) { switch (ic_type & 0xff) { case 0x80: device_set_desc(dev, "NEC 765 or clone"); break; case 0x81: /* not mentioned in any hardware doc */ case 0x90: device_set_desc(dev, "Enhanced floppy controller (i82077, NE72065 or clone)"); break; default: device_set_desc(dev, "Generic floppy controller"); break; } } out: fdc_release_resources(fdc); return (error); } static int fdc_isa_attach(device_t dev) { int ic_type; struct fdc_data *fdc; int error; fdc = device_get_softc(dev); fdc->fdctl_wr = fdctl_wr_isa; error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids); if (error == 0) fdc->flags |= FDC_ISPNP; if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) { switch (ic_type & 0xff) { case 0x80: fdc->fdct = FDC_NE765; break; case 0x81: /* not mentioned in any hardware doc */ case 0x90: fdc->fdct = FDC_ENHANCED; break; default: fdc->fdct = FDC_UNKNOWN; break; } } error = fdc_isa_alloc_resources(dev, fdc); if (error) goto out; error = fdc_attach(dev); if (error) goto out; error = fdc_hints_probe(dev); if (error) goto out; out: 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);