1 /*- 2 * Copyright (c) 2004-2005 M. Warner Losh. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/param.h> 31 #include <sys/bio.h> 32 #include <sys/bus.h> 33 #include <sys/kernel.h> 34 #include <sys/lock.h> 35 #include <sys/module.h> 36 #include <sys/mutex.h> 37 #include <sys/rman.h> 38 #include <sys/systm.h> 39 40 #include <machine/bus.h> 41 42 #include <dev/fdc/fdcvar.h> 43 44 #include <isa/isavar.h> 45 #include <isa/isareg.h> 46 47 static int fdc_isa_probe(device_t); 48 49 static struct isa_pnp_id fdc_ids[] = { 50 {0x0007d041, "PC standard floppy controller"}, /* PNP0700 */ 51 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */ 52 {0} 53 }; 54 55 /* 56 * On standard ISA, we don't just use an 8 port range 57 * (e.g. 0x3f0-0x3f7) since that covers an IDE control register at 58 * 0x3f6. So, on older hardware, we use 0x3f0-0x3f5 and 0x3f7. 59 * However, some BIOSs omit the control port, while others start at 60 * 0x3f2. Of the latter, sometimes we have two resources, other times 61 * we have one. We have to deal with the following cases: 62 * 63 * 1: 0x3f0-0x3f5 # very rare 64 * 2: 0x3f0 # hints -> 0x3f0-0x3f5,0x3f7 65 * 3: 0x3f0-0x3f5,0x3f7 # Most common 66 * 4: 0x3f2-0x3f5,0x3f7 # Second most common 67 * 5: 0x3f2-0x3f5 # implies 0x3f7 too. 68 * 6: 0x3f2-0x3f3,0x3f4-0x3f5,0x3f7 # becoming common 69 * 7: 0x3f2-0x3f3,0x3f4-0x3f5 # rare 70 * 8: 0x3f0-0x3f1,0x3f2-0x3f3,0x3f4-0x3f5,0x3f7 71 * 9: 0x3f0-0x3f3,0x3f4-0x3f5,0x3f7 72 * 73 * The following code is generic for any value of 0x3fx. It is also 74 * generic for all the above cases, as well as cases where things are 75 * even weirder. 76 */ 77 int 78 fdc_isa_alloc_resources(device_t dev, struct fdc_data *fdc) 79 { 80 struct resource *res; 81 int i, j, rid, newrid, nport; 82 u_long port; 83 84 fdc->fdc_dev = dev; 85 rid = 0; 86 for (i = 0; i < FDC_MAXREG; i++) 87 fdc->resio[i] = NULL; 88 89 nport = isa_get_logicalid(dev) ? 1 : 6; 90 for (rid = 0; ; rid++) { 91 newrid = rid; 92 res = bus_alloc_resource_anywhere(dev, SYS_RES_IOPORT, &newrid, 93 rid == 0 ? nport : 1, RF_ACTIVE); 94 if (res == NULL) 95 break; 96 /* 97 * Mask off the upper bits of the register, and sanity 98 * check resource ranges. 99 */ 100 i = rman_get_start(res) & 0x7; 101 if (i + rman_get_size(res) - 1 > FDC_MAXREG) { 102 bus_release_resource(dev, SYS_RES_IOPORT, newrid, res); 103 return (ENXIO); 104 } 105 for (j = 0; j < rman_get_size(res); j++) { 106 fdc->resio[i + j] = res; 107 fdc->ridio[i + j] = newrid; 108 fdc->ioff[i + j] = j; 109 fdc->ioh[i + j] = rman_get_bushandle(res); 110 } 111 } 112 if (fdc->resio[2] == NULL) { 113 device_printf(dev, "No FDOUT register!\n"); 114 return (ENXIO); 115 } 116 fdc->iot = rman_get_bustag(fdc->resio[2]); 117 if (fdc->resio[7] == NULL) { 118 port = (rman_get_start(fdc->resio[2]) & ~0x7) + 7; 119 newrid = rid; 120 res = bus_alloc_resource(dev, SYS_RES_IOPORT, &newrid, port, 121 port, 1, RF_ACTIVE); 122 if (res == NULL) { 123 device_printf(dev, "Faking up FDCTL\n"); 124 fdc->resio[7] = fdc->resio[2]; 125 fdc->ridio[7] = fdc->ridio[2]; 126 fdc->ioff[7] = fdc->ioff[2] + 5; 127 fdc->ioh[7] = fdc->ioh[2]; 128 } else { 129 fdc->resio[7] = res; 130 fdc->ridio[7] = newrid; 131 fdc->ioff[7] = rman_get_start(res) & 7; 132 fdc->ioh[7] = rman_get_bushandle(res); 133 } 134 } 135 136 fdc->res_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &fdc->rid_irq, 137 RF_ACTIVE | RF_SHAREABLE); 138 if (fdc->res_irq == NULL) { 139 device_printf(dev, "cannot reserve interrupt line\n"); 140 return (ENXIO); 141 } 142 143 if ((fdc->flags & FDC_NODMA) == 0) { 144 fdc->res_drq = bus_alloc_resource_any(dev, SYS_RES_DRQ, 145 &fdc->rid_drq, RF_ACTIVE | RF_SHAREABLE); 146 if (fdc->res_drq == NULL) { 147 device_printf(dev, "cannot reserve DMA request line\n"); 148 /* This is broken and doesn't work for ISA case */ 149 fdc->flags |= FDC_NODMA; 150 } else 151 fdc->dmachan = rman_get_start(fdc->res_drq); 152 } 153 154 return (0); 155 } 156 157 static int 158 fdc_isa_probe(device_t dev) 159 { 160 int error; 161 struct fdc_data *fdc; 162 163 fdc = device_get_softc(dev); 164 fdc->fdc_dev = dev; 165 166 /* Check pnp ids */ 167 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids); 168 if (error == ENXIO) 169 return (ENXIO); 170 171 /* Attempt to allocate our resources for the duration of the probe */ 172 error = fdc_isa_alloc_resources(dev, fdc); 173 if (error == 0) 174 error = fdc_initial_reset(dev, fdc); 175 176 fdc_release_resources(fdc); 177 return (error); 178 } 179 180 static int 181 fdc_isa_attach(device_t dev) 182 { 183 struct fdc_data *fdc; 184 int error; 185 186 fdc = device_get_softc(dev); 187 fdc->fdc_dev = dev; 188 error = fdc_isa_alloc_resources(dev, fdc); 189 if (error == 0) 190 error = fdc_attach(dev); 191 if (error == 0) 192 error = fdc_hints_probe(dev); 193 if (error == 0) 194 fdc_start_worker(dev); 195 else 196 fdc_release_resources(fdc); 197 return (error); 198 } 199 200 static device_method_t fdc_methods[] = { 201 /* Device interface */ 202 DEVMETHOD(device_probe, fdc_isa_probe), 203 DEVMETHOD(device_attach, fdc_isa_attach), 204 DEVMETHOD(device_detach, fdc_detach), 205 DEVMETHOD(device_shutdown, bus_generic_shutdown), 206 DEVMETHOD(device_suspend, bus_generic_suspend), 207 DEVMETHOD(device_resume, bus_generic_resume), 208 209 /* Bus interface */ 210 DEVMETHOD(bus_print_child, fdc_print_child), 211 DEVMETHOD(bus_read_ivar, fdc_read_ivar), 212 DEVMETHOD(bus_write_ivar, fdc_write_ivar), 213 /* Our children never use any other bus interface methods. */ 214 215 { 0, 0 } 216 }; 217 218 static driver_t fdc_driver = { 219 "fdc", 220 fdc_methods, 221 sizeof(struct fdc_data) 222 }; 223 224 DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0); 225