fdc_isa.c revision 135504
1236099Sdes/*- 2236099Sdes * Copyright (c) 2004 M. Warner Losh. 3236099Sdes * All rights reserved. 4236099Sdes * 5236099Sdes * Redistribution and use in source and binary forms, with or without 6236099Sdes * modification, are permitted provided that the following conditions 7236099Sdes * are met: 8236099Sdes * 1. Redistributions of source code must retain the above copyright 9255376Sdes * notice, this list of conditions, and the following disclaimer, 10236099Sdes * without modification, immediately at the beginning of the file. 11236099Sdes * 2. Redistributions in binary form must reproduce the above copyright 12236099Sdes * notice, this list of conditions and the following disclaimer in 13236099Sdes * the documentation and/or other materials provided with the 14236099Sdes * distribution. 15236099Sdes * 16236099Sdes * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17236099Sdes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18236099Sdes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19236099Sdes * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 20236099Sdes * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21236099Sdes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22236099Sdes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23236099Sdes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24236099Sdes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25236099Sdes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26236099Sdes * SUCH DAMAGE. 27236099Sdes */ 28236099Sdes 29255376Sdes#include <sys/cdefs.h> 30236099Sdes__FBSDID("$FreeBSD: head/sys/dev/fdc/fdc_isa.c 135504 2004-09-20 06:12:19Z imp $"); 31236099Sdes 32236099Sdes#include <sys/param.h> 33236099Sdes#include <sys/bio.h> 34236099Sdes#include <sys/bus.h> 35236099Sdes#include <sys/kernel.h> 36236099Sdes#include <sys/lock.h> 37236099Sdes#include <sys/module.h> 38236099Sdes#include <sys/mutex.h> 39236099Sdes#include <sys/rman.h> 40236099Sdes#include <sys/systm.h> 41236099Sdes 42236099Sdes#include <machine/bus.h> 43236099Sdes 44236099Sdes#include <dev/fdc/fdcvar.h> 45236099Sdes 46236099Sdes#include <isa/isavar.h> 47236099Sdes#include <isa/isareg.h> 48236099Sdes 49236099Sdesstatic int fdc_isa_probe(device_t); 50236099Sdes 51236099Sdesstatic struct isa_pnp_id fdc_ids[] = { 52236099Sdes {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */ 53236099Sdes {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */ 54236099Sdes {0} 55236099Sdes}; 56236099Sdes 57236099Sdesint 58236099Sdesfdc_isa_alloc_resources(device_t dev, struct fdc_data *fdc) 59236099Sdes{ 60236099Sdes int nports = 6; 61236099Sdes 62236099Sdes fdc->fdc_dev = dev; 63236099Sdes fdc->rid_ioport = 0; 64236099Sdes fdc->rid_irq = 0; 65236099Sdes fdc->rid_drq = 0; 66236099Sdes fdc->rid_ctl = 1; 67236099Sdes 68236099Sdes /* 69236099Sdes * On standard ISA, we don't just use an 8 port range 70236099Sdes * (e.g. 0x3f0-0x3f7) since that covers an IDE control 71236099Sdes * register at 0x3f6. So, on older hardware, we use 72236099Sdes * 0x3f0-0x3f5 and 0x3f7. However, some BIOSs omit the 73236099Sdes * control port, while others start at 0x3f2. Of the latter, 74236099Sdes * sometimes we have two resources, other times we have one. 75236099Sdes * We have to deal with the following cases: 76236099Sdes * 77236099Sdes * 1: 0x3f0-0x3f5 # very rare 78236099Sdes * 2: 0x3f0 # hints -> 0x3f0-0x3f5,0x3f7 79236099Sdes * 3: 0x3f0-0x3f5,0x3f7 # Most common 80236099Sdes * 4: 0x3f2-0x3f5,0x3f7 # Second most common 81236099Sdes * 5: 0x3f2-0x3f5 # implies 0x3f7 too. 82236099Sdes * 6: 0x3f2-0x3f3,0x3f4-0x3f5,0x3f7 # becoming common 83236099Sdes * 7: 0x3f2-0x3f3,0x3f4-0x3f5 # rare 84236099Sdes * 8: 0x3f0-0x3f1,0x3f2-0x3f3,0x3f4-0x3f5,0x3f7 85236099Sdes * 86236099Sdes * The following code is generic for any value of 0x3fx :-) 87236099Sdes */ 88236099Sdes 89236099Sdes /* 90236099Sdes * First, allocated the main range of ports. In the best of 91236099Sdes * worlds, this is 4 or 6 ports. In others, well, that's 92236099Sdes * why this function is so complicated. 93236099Sdes */ 94236099Sdesagain_ioport: 95236099Sdes fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT, 96236099Sdes &fdc->rid_ioport, 0ul, ~0ul, nports, RF_ACTIVE); 97236099Sdes if (fdc->res_ioport == 0) { 98236099Sdes device_printf(dev, "cannot allocate I/O port (%d ports)\n", 99236099Sdes nports); 100236099Sdes return (ENXIO); 101236099Sdes } 102236099Sdes if ((rman_get_start(fdc->res_ioport) & 0x7) == 0 && 103236099Sdes rman_get_size(fdc->res_ioport) == 2) { 104236099Sdes /* Case 8 */ 105236099Sdes bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport, 106236099Sdes fdc->res_ioport); 107236099Sdes fdc->rid_ioport++; 108236099Sdes goto again_ioport; 109236099Sdes } 110236099Sdes fdc->portt = rman_get_bustag(fdc->res_ioport); 111236099Sdes fdc->porth = rman_get_bushandle(fdc->res_ioport); 112236099Sdes 113236099Sdes /* 114236099Sdes * Handle cases 4-8 above 115236099Sdes */ 116236099Sdes fdc->port_off = -(fdc->porth & 0x7); 117236099Sdes 118236099Sdes /* 119236099Sdes * Deal with case 6, 7, and 8: FDSTS and FDSATA are in rid 1. 120236099Sdes */ 121236099Sdes if (rman_get_size(fdc->res_ioport) == 2) { 122236099Sdes fdc->rid_sts = fdc->rid_ioport + 1; 123236099Sdes fdc->res_sts = bus_alloc_resource_any(dev, SYS_RES_IOPORT, 124236099Sdes &fdc->rid_sts, RF_ACTIVE); 125236099Sdes if (fdc->res_sts == NULL) { 126236099Sdes device_printf(dev, "Can't alloc rid 1"); 127236099Sdes fdc_release_resources(fdc); 128236099Sdes return (ENXIO); 129236099Sdes } 130236099Sdes fdc->sts_off = -4; 131236099Sdes fdc->stst = rman_get_bustag(fdc->res_sts); 132236099Sdes fdc->stsh = rman_get_bushandle(fdc->res_sts); 133236099Sdes } else { 134236099Sdes fdc->res_sts = NULL; 135236099Sdes fdc->sts_off = fdc->port_off; 136236099Sdes fdc->stst = fdc->portt; 137236099Sdes fdc->stsh = fdc->porth; 138236099Sdes } 139236099Sdes 140236099Sdes /* 141236099Sdes * allocate the control port. For cases 1, 2, 5 and 7, we 142236099Sdes * fake it from the ioports resource. XXX IS THIS THE RIGHT THING 143236099Sdes * TO DO, OR SHOULD WE CREATE A NEW RID? (I think we need a new rid) 144236099Sdes */ 145236099Sdes fdc->rid_ctl = fdc->rid_sts + 1; 146236099Sdes fdc->res_ctl = bus_alloc_resource_any(dev, SYS_RES_IOPORT, 147236099Sdes &fdc->rid_ctl, RF_ACTIVE); 148236099Sdes if (fdc->res_ctl == NULL) { 149236099Sdes fdc->ctl_off = 7 + fdc->port_off; 150236099Sdes fdc->res_ctl = NULL; 151236099Sdes fdc->ctlt = fdc->portt; 152236099Sdes fdc->ctlh = fdc->porth; 153236099Sdes } else { 154236099Sdes fdc->ctl_off = 0; 155236099Sdes fdc->ctlt = rman_get_bustag(fdc->res_ctl); 156 fdc->ctlh = rman_get_bushandle(fdc->res_ctl); 157 } 158 159 fdc->res_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &fdc->rid_irq, 160 RF_ACTIVE | RF_SHAREABLE); 161 if (fdc->res_irq == 0) { 162 device_printf(dev, "cannot reserve interrupt line\n"); 163 return (ENXIO); 164 } 165 166 if ((fdc->flags & FDC_NODMA) == 0) { 167 fdc->res_drq = bus_alloc_resource_any(dev, SYS_RES_DRQ, 168 &fdc->rid_drq, RF_ACTIVE | RF_SHAREABLE); 169 if (fdc->res_drq == 0) { 170 device_printf(dev, "cannot reserve DMA request line\n"); 171 /* This is broken and doesn't work for ISA case */ 172 fdc->flags |= FDC_NODMA; 173 } else 174 fdc->dmachan = rman_get_start(fdc->res_drq); 175 } 176 177 return (0); 178} 179 180static int 181fdc_isa_probe(device_t dev) 182{ 183 int error; 184 struct fdc_data *fdc; 185 186 fdc = device_get_softc(dev); 187 fdc->fdc_dev = dev; 188 189 /* Check pnp ids */ 190 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids); 191 if (error == ENXIO) 192 return (ENXIO); 193 194 /* Attempt to allocate our resources for the duration of the probe */ 195 error = fdc_isa_alloc_resources(dev, fdc); 196 if (error == 0) 197 error = fdc_initial_reset(dev, fdc); 198 199 fdc_release_resources(fdc); 200 return (error); 201} 202 203static int 204fdc_isa_attach(device_t dev) 205{ 206 struct fdc_data *fdc; 207 int error; 208 209 fdc = device_get_softc(dev); 210 error = fdc_isa_alloc_resources(dev, fdc); 211 if (error == 0) 212 error = fdc_attach(dev); 213 if (error == 0) 214 error = fdc_hints_probe(dev); 215 if (error) 216 fdc_release_resources(fdc); 217 return (error); 218} 219 220static device_method_t fdc_methods[] = { 221 /* Device interface */ 222 DEVMETHOD(device_probe, fdc_isa_probe), 223 DEVMETHOD(device_attach, fdc_isa_attach), 224 DEVMETHOD(device_detach, fdc_detach), 225 DEVMETHOD(device_shutdown, bus_generic_shutdown), 226 DEVMETHOD(device_suspend, bus_generic_suspend), 227 DEVMETHOD(device_resume, bus_generic_resume), 228 229 /* Bus interface */ 230 DEVMETHOD(bus_print_child, fdc_print_child), 231 DEVMETHOD(bus_read_ivar, fdc_read_ivar), 232 DEVMETHOD(bus_write_ivar, fdc_write_ivar), 233 /* Our children never use any other bus interface methods. */ 234 235 { 0, 0 } 236}; 237 238static driver_t fdc_driver = { 239 "fdc", 240 fdc_methods, 241 sizeof(struct fdc_data) 242}; 243 244DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0); 245