/*- * 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 #include 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);