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