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/param.h> 29 #include <sys/bio.h> 30 #include <sys/bus.h> 31 #include <sys/kernel.h> 32 #include <sys/lock.h> 33 #include <sys/module.h> 34 #include <sys/mutex.h> 35 #include <sys/rman.h> 36 #include <sys/systm.h> 37 38 #include <machine/bus.h> 39 40 #include <dev/fdc/fdcvar.h> 41 42 #include <isa/isavar.h> 43 #include <isa/isareg.h> 44 45 static int fdc_isa_probe(device_t); 46 47 static struct isa_pnp_id fdc_ids[] = { 48 {0x0007d041, "PC standard floppy controller"}, /* PNP0700 */ 49 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */ 50 {0} 51 }; 52 53 /* 54 * On standard ISA, we don't just use an 8 port range 55 * (e.g. 0x3f0-0x3f7) since that covers an IDE control register at 56 * 0x3f6. So, on older hardware, we use 0x3f0-0x3f5 and 0x3f7. 57 * However, some BIOSs omit the control port, while others start at 58 * 0x3f2. Of the latter, sometimes we have two resources, other times 59 * we have one. We have to deal with the following cases: 60 * 61 * 1: 0x3f0-0x3f5 # very rare 62 * 2: 0x3f0 # hints -> 0x3f0-0x3f5,0x3f7 63 * 3: 0x3f0-0x3f5,0x3f7 # Most common 64 * 4: 0x3f2-0x3f5,0x3f7 # Second most common 65 * 5: 0x3f2-0x3f5 # implies 0x3f7 too. 66 * 6: 0x3f2-0x3f3,0x3f4-0x3f5,0x3f7 # becoming common 67 * 7: 0x3f2-0x3f3,0x3f4-0x3f5 # rare 68 * 8: 0x3f0-0x3f1,0x3f2-0x3f3,0x3f4-0x3f5,0x3f7 69 * 9: 0x3f0-0x3f3,0x3f4-0x3f5,0x3f7 70 * 71 * The following code is generic for any value of 0x3fx. It is also 72 * generic for all the above cases, as well as cases where things are 73 * even weirder. 74 */ 75 int 76 fdc_isa_alloc_resources(device_t dev, struct fdc_data *fdc) 77 { 78 struct resource *res; 79 int i, j, rid, newrid, nport; 80 u_long port; 81 82 fdc->fdc_dev = dev; 83 rid = 0; 84 for (i = 0; i < FDC_MAXREG; i++) 85 fdc->resio[i] = NULL; 86 87 nport = isa_get_logicalid(dev) ? 1 : 6; 88 for (rid = 0; ; rid++) { 89 newrid = rid; 90 res = bus_alloc_resource_anywhere(dev, SYS_RES_IOPORT, &newrid, 91 rid == 0 ? nport : 1, RF_ACTIVE); 92 if (res == NULL) 93 break; 94 /* 95 * Mask off the upper bits of the register, and sanity 96 * check resource ranges. 97 */ 98 i = rman_get_start(res) & 0x7; 99 if (i + rman_get_size(res) - 1 > FDC_MAXREG) { 100 bus_release_resource(dev, SYS_RES_IOPORT, newrid, res); 101 return (ENXIO); 102 } 103 for (j = 0; j < rman_get_size(res); j++) { 104 fdc->resio[i + j] = res; 105 fdc->ridio[i + j] = newrid; 106 fdc->ioff[i + j] = j; 107 fdc->ioh[i + j] = rman_get_bushandle(res); 108 } 109 } 110 if (fdc->resio[2] == NULL) { 111 device_printf(dev, "No FDOUT register!\n"); 112 return (ENXIO); 113 } 114 fdc->iot = rman_get_bustag(fdc->resio[2]); 115 if (fdc->resio[7] == NULL) { 116 port = (rman_get_start(fdc->resio[2]) & ~0x7) + 7; 117 newrid = rid; 118 res = bus_alloc_resource(dev, SYS_RES_IOPORT, &newrid, port, 119 port, 1, RF_ACTIVE); 120 if (res == NULL) { 121 device_printf(dev, "Faking up FDCTL\n"); 122 fdc->resio[7] = fdc->resio[2]; 123 fdc->ridio[7] = fdc->ridio[2]; 124 fdc->ioff[7] = fdc->ioff[2] + 5; 125 fdc->ioh[7] = fdc->ioh[2]; 126 } else { 127 fdc->resio[7] = res; 128 fdc->ridio[7] = newrid; 129 fdc->ioff[7] = rman_get_start(res) & 7; 130 fdc->ioh[7] = rman_get_bushandle(res); 131 } 132 } 133 134 fdc->res_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &fdc->rid_irq, 135 RF_ACTIVE | RF_SHAREABLE); 136 if (fdc->res_irq == NULL) { 137 device_printf(dev, "cannot reserve interrupt line\n"); 138 return (ENXIO); 139 } 140 141 if ((fdc->flags & FDC_NODMA) == 0) { 142 fdc->res_drq = bus_alloc_resource_any(dev, SYS_RES_DRQ, 143 &fdc->rid_drq, RF_ACTIVE | RF_SHAREABLE); 144 if (fdc->res_drq == NULL) { 145 device_printf(dev, "cannot reserve DMA request line\n"); 146 /* This is broken and doesn't work for ISA case */ 147 fdc->flags |= FDC_NODMA; 148 } else 149 fdc->dmachan = rman_get_start(fdc->res_drq); 150 } 151 152 return (0); 153 } 154 155 static int 156 fdc_isa_probe(device_t dev) 157 { 158 int error; 159 struct fdc_data *fdc; 160 161 fdc = device_get_softc(dev); 162 fdc->fdc_dev = dev; 163 164 /* Check pnp ids */ 165 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids); 166 if (error == ENXIO) 167 return (ENXIO); 168 169 /* Attempt to allocate our resources for the duration of the probe */ 170 error = fdc_isa_alloc_resources(dev, fdc); 171 if (error == 0) 172 error = fdc_initial_reset(dev, fdc); 173 174 fdc_release_resources(fdc); 175 return (error); 176 } 177 178 static int 179 fdc_isa_attach(device_t dev) 180 { 181 struct fdc_data *fdc; 182 int error; 183 184 fdc = device_get_softc(dev); 185 fdc->fdc_dev = dev; 186 error = fdc_isa_alloc_resources(dev, fdc); 187 if (error == 0) 188 error = fdc_attach(dev); 189 if (error == 0) 190 error = fdc_hints_probe(dev); 191 if (error == 0) 192 fdc_start_worker(dev); 193 else 194 fdc_release_resources(fdc); 195 return (error); 196 } 197 198 static device_method_t fdc_methods[] = { 199 /* Device interface */ 200 DEVMETHOD(device_probe, fdc_isa_probe), 201 DEVMETHOD(device_attach, fdc_isa_attach), 202 DEVMETHOD(device_detach, fdc_detach), 203 DEVMETHOD(device_shutdown, bus_generic_shutdown), 204 DEVMETHOD(device_suspend, bus_generic_suspend), 205 DEVMETHOD(device_resume, bus_generic_resume), 206 207 /* Bus interface */ 208 DEVMETHOD(bus_print_child, fdc_print_child), 209 DEVMETHOD(bus_read_ivar, fdc_read_ivar), 210 DEVMETHOD(bus_write_ivar, fdc_write_ivar), 211 /* Our children never use any other bus interface methods. */ 212 213 { 0, 0 } 214 }; 215 216 static driver_t fdc_driver = { 217 "fdc", 218 fdc_methods, 219 sizeof(struct fdc_data) 220 }; 221 222 DRIVER_MODULE(fdc, isa, fdc_driver, 0, 0); 223 ISA_PNP_INFO(fdc_ids); 224