1 /*- 2 * Copyright (c) 2004 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 * without modification, immediately at the beginning of the file. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in 13 * the documentation and/or other materials provided with the 14 * distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 20 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/param.h> 33 #include <sys/bio.h> 34 #include <sys/bus.h> 35 #include <sys/kernel.h> 36 #include <sys/lock.h> 37 #include <sys/module.h> 38 #include <sys/mutex.h> 39 #include <sys/rman.h> 40 #include <sys/systm.h> 41 42 #include <machine/bus.h> 43 44 #include <dev/fdc/fdcvar.h> 45 46 #include <isa/isavar.h> 47 #include <isa/isareg.h> 48 49 static int fdc_isa_probe(device_t); 50 51 static struct isa_pnp_id fdc_ids[] = { 52 {0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */ 53 {0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */ 54 {0} 55 }; 56 57 int 58 fdc_isa_alloc_resources(device_t dev, struct fdc_data *fdc) 59 { 60 int nports = 6; 61 62 fdc->fdc_dev = dev; 63 fdc->rid_ioport = 0; 64 fdc->rid_irq = 0; 65 fdc->rid_drq = 0; 66 fdc->rid_ctl = 1; 67 68 /* 69 * On standard ISA, we don't just use an 8 port range 70 * (e.g. 0x3f0-0x3f7) since that covers an IDE control 71 * register at 0x3f6. So, on older hardware, we use 72 * 0x3f0-0x3f5 and 0x3f7. However, some BIOSs omit the 73 * control port, while others start at 0x3f2. Of the latter, 74 * sometimes we have two resources, other times we have one. 75 * We have to deal with the following cases: 76 * 77 * 1: 0x3f0-0x3f5 # very rare 78 * 2: 0x3f0 # hints -> 0x3f0-0x3f5,0x3f7 79 * 3: 0x3f0-0x3f5,0x3f7 # Most common 80 * 4: 0x3f2-0x3f5,0x3f7 # Second most common 81 * 5: 0x3f2-0x3f5 # implies 0x3f7 too. 82 * 6: 0x3f2-0x3f3,0x3f4-0x3f5,0x3f7 # becoming common 83 * 7: 0x3f2-0x3f3,0x3f4-0x3f5 # rare 84 * 85 * The following code is generic for any value of 0x3fx :-) 86 */ 87 88 /* 89 * First, allocated the main range of ports. In the best of 90 * worlds, this is 4 or 6 ports. In others, well, that's 91 * why this function is so complicated. 92 */ 93 fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT, 94 &fdc->rid_ioport, 0ul, ~0ul, nports, RF_ACTIVE); 95 if (fdc->res_ioport == 0) { 96 device_printf(dev, "cannot allocate I/O port (%d ports)\n", 97 nports); 98 return (ENXIO); 99 } 100 fdc->portt = rman_get_bustag(fdc->res_ioport); 101 fdc->porth = rman_get_bushandle(fdc->res_ioport); 102 103 /* 104 * Handle cases 4-7 above 105 */ 106 fdc->port_off = -(fdc->porth & 0x7); 107 108 /* 109 * Deal with case 6 and 7: FDSTS and FDSATA are in rid 1. 110 */ 111 if (rman_get_size(fdc->res_ioport) == 2) { 112 fdc->rid_sts = 1; 113 fdc->res_sts = bus_alloc_resource_any(dev, SYS_RES_IOPORT, 114 &fdc->rid_sts, RF_ACTIVE); 115 if (fdc->res_sts == NULL) { 116 device_printf(dev, "Can't alloc rid 1"); 117 fdc_release_resources(fdc); 118 return (ENXIO); 119 } 120 fdc->rid_ctl++; 121 fdc->sts_off = -4; 122 fdc->stst = rman_get_bustag(fdc->res_sts); 123 fdc->stsh = rman_get_bushandle(fdc->res_sts); 124 } else { 125 fdc->res_sts = NULL; 126 fdc->sts_off = fdc->port_off; 127 fdc->stst = fdc->portt; 128 fdc->stsh = fdc->porth; 129 } 130 131 /* 132 * allocate the control port. For cases 1, 2, 5 and 7, we 133 * fake it from the ioports resource. XXX IS THIS THE RIGHT THING 134 * TO DO, OR SHOULD WE CREATE A NEW RID? (I think we need a new rid) 135 */ 136 fdc->res_ctl = bus_alloc_resource_any(dev, SYS_RES_IOPORT, 137 &fdc->rid_ctl, RF_ACTIVE); 138 if (fdc->res_ctl == NULL) { 139 fdc->ctl_off = 7 + fdc->port_off; 140 fdc->res_ctl = NULL; 141 fdc->ctlt = fdc->portt; 142 fdc->ctlh = fdc->porth; 143 } else { 144 fdc->ctl_off = 0; 145 fdc->ctlt = rman_get_bustag(fdc->res_ctl); 146 fdc->ctlh = rman_get_bushandle(fdc->res_ctl); 147 } 148 149 fdc->res_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &fdc->rid_irq, 150 RF_ACTIVE | RF_SHAREABLE); 151 if (fdc->res_irq == 0) { 152 device_printf(dev, "cannot reserve interrupt line\n"); 153 return (ENXIO); 154 } 155 156 if ((fdc->flags & FDC_NODMA) == 0) { 157 fdc->res_drq = bus_alloc_resource_any(dev, SYS_RES_DRQ, 158 &fdc->rid_drq, RF_ACTIVE | RF_SHAREABLE); 159 if (fdc->res_drq == 0) { 160 device_printf(dev, "cannot reserve DMA request line\n"); 161 /* This is broken and doesn't work for ISA case */ 162 fdc->flags |= FDC_NODMA; 163 } else 164 fdc->dmachan = rman_get_start(fdc->res_drq); 165 } 166 167 return (0); 168 } 169 170 static int 171 fdc_isa_probe(device_t dev) 172 { 173 int error; 174 struct fdc_data *fdc; 175 176 fdc = device_get_softc(dev); 177 fdc->fdc_dev = dev; 178 179 /* Check pnp ids */ 180 error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids); 181 if (error == ENXIO) 182 return (ENXIO); 183 184 /* Attempt to allocate our resources for the duration of the probe */ 185 error = fdc_isa_alloc_resources(dev, fdc); 186 if (error == 0) 187 error = fdc_initial_reset(dev, fdc); 188 189 fdc_release_resources(fdc); 190 return (error); 191 } 192 193 static int 194 fdc_isa_attach(device_t dev) 195 { 196 struct fdc_data *fdc; 197 int error; 198 199 fdc = device_get_softc(dev); 200 error = fdc_isa_alloc_resources(dev, fdc); 201 if (error == 0) 202 error = fdc_attach(dev); 203 if (error == 0) 204 error = fdc_hints_probe(dev); 205 if (error) 206 fdc_release_resources(fdc); 207 return (error); 208 } 209 210 static device_method_t fdc_methods[] = { 211 /* Device interface */ 212 DEVMETHOD(device_probe, fdc_isa_probe), 213 DEVMETHOD(device_attach, fdc_isa_attach), 214 DEVMETHOD(device_detach, fdc_detach), 215 DEVMETHOD(device_shutdown, bus_generic_shutdown), 216 DEVMETHOD(device_suspend, bus_generic_suspend), 217 DEVMETHOD(device_resume, bus_generic_resume), 218 219 /* Bus interface */ 220 DEVMETHOD(bus_print_child, fdc_print_child), 221 DEVMETHOD(bus_read_ivar, fdc_read_ivar), 222 DEVMETHOD(bus_write_ivar, fdc_write_ivar), 223 /* Our children never use any other bus interface methods. */ 224 225 { 0, 0 } 226 }; 227 228 static driver_t fdc_driver = { 229 "fdc", 230 fdc_methods, 231 sizeof(struct fdc_data) 232 }; 233 234 DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0); 235