fdc_isa.c revision 140469
1198092Srdivacky/*- 2198092Srdivacky * Copyright (c) 2004-2005 M. Warner Losh. 3353358Sdim * All rights reserved. 4353358Sdim * 5353358Sdim * Redistribution and use in source and binary forms, with or without 6198092Srdivacky * modification, are permitted provided that the following conditions 7198092Srdivacky * are met: 8198092Srdivacky * 1. Redistributions of source code must retain the above copyright 9198092Srdivacky * notice, this list of conditions and the following disclaimer. 10198092Srdivacky * 2. Redistributions in binary form must reproduce the above copyright 11198092Srdivacky * notice, this list of conditions and the following disclaimer in the 12198092Srdivacky * documentation and/or other materials provided with the distribution. 13212904Sdim * 14276479Sdim * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15198092Srdivacky * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16198092Srdivacky * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17198092Srdivacky * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18360784Sdim * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19206084Srdivacky * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20203955Srdivacky * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21203955Srdivacky * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22198092Srdivacky * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23234353Sdim * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24198092Srdivacky * SUCH DAMAGE. 25198092Srdivacky */ 26198092Srdivacky 27198092Srdivacky#include <sys/cdefs.h> 28198092Srdivacky__FBSDID("$FreeBSD: head/sys/dev/fdc/fdc_isa.c 140469 2005-01-19 07:46:38Z imp $"); 29198092Srdivacky 30198092Srdivacky#include <sys/param.h> 31198092Srdivacky#include <sys/bio.h> 32198092Srdivacky#include <sys/bus.h> 33198092Srdivacky#include <sys/kernel.h> 34198092Srdivacky#include <sys/lock.h> 35198092Srdivacky#include <sys/module.h> 36198092Srdivacky#include <sys/mutex.h> 37198092Srdivacky#include <sys/rman.h> 38280031Sdim#include <sys/systm.h> 39280031Sdim 40280031Sdim#include <machine/bus.h> 41280031Sdim 42280031Sdim#include <dev/fdc/fdcvar.h> 43280031Sdim 44280031Sdim#include <isa/isavar.h> 45280031Sdim#include <isa/isareg.h> 46314564Sdim 47314564Sdimstatic int fdc_isa_probe(device_t); 48314564Sdim 49280031Sdimstatic struct isa_pnp_id fdc_ids[] = { 50280031Sdim {0x0007d041, "PC standard floppy controller"}, /* PNP0700 */ 51280031Sdim {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */ 52314564Sdim {0} 53314564Sdim}; 54314564Sdim 55314564Sdim/* 56314564Sdim * On standard ISA, we don't just use an 8 port range 57314564Sdim * (e.g. 0x3f0-0x3f7) since that covers an IDE control register at 58314564Sdim * 0x3f6. So, on older hardware, we use 0x3f0-0x3f5 and 0x3f7. 59314564Sdim * However, some BIOSs omit the control port, while others start at 60314564Sdim * 0x3f2. Of the latter, sometimes we have two resources, other times 61314564Sdim * we have one. We have to deal with the following cases: 62314564Sdim * 63314564Sdim * 1: 0x3f0-0x3f5 # very rare 64314564Sdim * 2: 0x3f0 # hints -> 0x3f0-0x3f5,0x3f7 65314564Sdim * 3: 0x3f0-0x3f5,0x3f7 # Most common 66280031Sdim * 4: 0x3f2-0x3f5,0x3f7 # Second most common 67344779Sdim * 5: 0x3f2-0x3f5 # implies 0x3f7 too. 68280031Sdim * 6: 0x3f2-0x3f3,0x3f4-0x3f5,0x3f7 # becoming common 69280031Sdim * 7: 0x3f2-0x3f3,0x3f4-0x3f5 # rare 70280031Sdim * 8: 0x3f0-0x3f1,0x3f2-0x3f3,0x3f4-0x3f5,0x3f7 71280031Sdim * 9: 0x3f0-0x3f3,0x3f4-0x3f5,0x3f7 72314564Sdim * 73314564Sdim * The following code is generic for any value of 0x3fx. It is also 74314564Sdim * generic for all the above cases, as well as cases where things are 75314564Sdim * even weirder. 76280031Sdim */ 77280031Sdimint 78280031Sdimfdc_isa_alloc_resources(device_t dev, struct fdc_data *fdc) 79341825Sdim{ 80341825Sdim struct resource *res; 81341825Sdim int nports = 6; 82341825Sdim int i, j, rid, newrid; 83341825Sdim 84360784Sdim fdc->fdc_dev = dev; 85360784Sdim rid = 0; 86341825Sdim for (i = 0; i < FDC_MAXREG; i++) 87360784Sdim fdc->resio[i] = NULL; 88360784Sdim 89360784Sdim for (rid = 0; ; rid++) { 90360784Sdim newrid = rid; 91360784Sdim res = bus_alloc_resource(dev, SYS_RES_IOPORT, 92360784Sdim &newrid, 0ul, ~0ul, nports, RF_ACTIVE); 93360784Sdim if (res == NULL) 94360784Sdim break; 95341825Sdim i = rman_get_start(res); 96341825Sdim for (j = 0; j < rman_get_size(res); j++) { 97341825Sdim fdc->resio[i + j] = res; 98341825Sdim fdc->ridio[i + j] = newrid; 99341825Sdim fdc->ioff[i + j] = j; 100341825Sdim fdc->ioh[i + j] = rman_get_bushandle(res); 101341825Sdim } 102341825Sdim } 103341825Sdim if (fdc->resio[2] == NULL) 104341825Sdim return (ENXIO); 105341825Sdim fdc->iot = rman_get_bustag(fdc->resio[2]); 106341825Sdim if (fdc->resio[7] == NULL) { 107341825Sdim /* XXX allocate */ 108341825Sdim fdc->resio[7] = fdc->resio[2]; 109341825Sdim fdc->ridio[7] = fdc->ridio[2]; 110198092Srdivacky fdc->ioff[7] = fdc->ioff[2] + 5; 111198092Srdivacky fdc->ioh[7] = fdc->ioh[2]; 112198092Srdivacky } 113249423Sdim 114249423Sdim fdc->res_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &fdc->rid_irq, 115249423Sdim RF_ACTIVE | RF_SHAREABLE); 116296417Sdim if (fdc->res_irq == NULL) { 117249423Sdim device_printf(dev, "cannot reserve interrupt line\n"); 118249423Sdim return (ENXIO); 119249423Sdim } 120249423Sdim 121249423Sdim if ((fdc->flags & FDC_NODMA) == 0) { 122249423Sdim fdc->res_drq = bus_alloc_resource_any(dev, SYS_RES_DRQ, 123249423Sdim &fdc->rid_drq, RF_ACTIVE | RF_SHAREABLE); 124249423Sdim if (fdc->res_drq == NULL) { 125249423Sdim device_printf(dev, "cannot reserve DMA request line\n"); 126249423Sdim /* This is broken and doesn't work for ISA case */ 127198092Srdivacky fdc->flags |= FDC_NODMA; 128249423Sdim } else 129249423Sdim fdc->dmachan = rman_get_start(fdc->res_drq); 130249423Sdim } 131249423Sdim 132249423Sdim return (0); 133198092Srdivacky} 134249423Sdim 135249423Sdimstatic int 136249423Sdimfdc_isa_probe(device_t dev) 137249423Sdim{ 138249423Sdim int error; 139249423Sdim struct fdc_data *fdc; 140249423Sdim 141198092Srdivacky fdc = device_get_softc(dev); 142249423Sdim fdc->fdc_dev = dev; 143249423Sdim 144249423Sdim /* Check pnp ids */ 145249423Sdim error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids); 146249423Sdim if (error == ENXIO) 147249423Sdim return (ENXIO); 148249423Sdim 149249423Sdim /* Attempt to allocate our resources for the duration of the probe */ 150249423Sdim error = fdc_isa_alloc_resources(dev, fdc); 151249423Sdim if (error == 0) 152249423Sdim error = fdc_initial_reset(dev, fdc); 153249423Sdim 154249423Sdim fdc_release_resources(fdc); 155249423Sdim return (error); 156249423Sdim} 157249423Sdim 158309124Sdimstatic int 159309124Sdimfdc_isa_attach(device_t dev) 160309124Sdim{ 161360784Sdim struct fdc_data *fdc; 162309124Sdim int error; 163309124Sdim 164309124Sdim fdc = device_get_softc(dev); 165249423Sdim error = fdc_isa_alloc_resources(dev, fdc); 166360784Sdim if (error == 0) 167309124Sdim error = fdc_attach(dev); 168309124Sdim if (error == 0) 169198092Srdivacky error = fdc_hints_probe(dev); 170198092Srdivacky if (error) 171198092Srdivacky fdc_release_resources(fdc); 172198092Srdivacky return (error); 173198092Srdivacky} 174198092Srdivacky 175198092Srdivackystatic device_method_t fdc_methods[] = { 176198092Srdivacky /* Device interface */ 177314564Sdim DEVMETHOD(device_probe, fdc_isa_probe), 178314564Sdim DEVMETHOD(device_attach, fdc_isa_attach), 179327952Sdim DEVMETHOD(device_detach, fdc_detach), 180314564Sdim DEVMETHOD(device_shutdown, bus_generic_shutdown), 181314564Sdim DEVMETHOD(device_suspend, bus_generic_suspend), 182198092Srdivacky DEVMETHOD(device_resume, bus_generic_resume), 183198092Srdivacky 184198092Srdivacky /* Bus interface */ 185198092Srdivacky DEVMETHOD(bus_print_child, fdc_print_child), 186198092Srdivacky DEVMETHOD(bus_read_ivar, fdc_read_ivar), 187198092Srdivacky DEVMETHOD(bus_write_ivar, fdc_write_ivar), 188198092Srdivacky /* Our children never use any other bus interface methods. */ 189198092Srdivacky 190198092Srdivacky { 0, 0 } 191198092Srdivacky}; 192198092Srdivacky 193198092Srdivackystatic driver_t fdc_driver = { 194198092Srdivacky "fdc", 195198092Srdivacky fdc_methods, 196234982Sdim sizeof(struct fdc_data) 197234982Sdim}; 198280031Sdim 199280031SdimDRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0); 200280031Sdim