1 /* 2 * Copyright 2002 by Peter Grehan. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 3. The name of the author may not be used to endorse or promote products 13 * derived from this software without specific prior written permission. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 20 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 21 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 22 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 23 * 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 * $FreeBSD$ 28 */ 29 30 /* 31 * PSIM local bus ATA controller 32 */ 33 #include "opt_ata.h" 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/kernel.h> 37 #include <sys/module.h> 38 #include <sys/bus.h> 39 #include <sys/malloc.h> 40 #include <sys/sema.h> 41 #include <sys/taskqueue.h> 42 #include <machine/stdarg.h> 43 #include <vm/uma.h> 44 #include <machine/resource.h> 45 #include <machine/bus.h> 46 #include <sys/rman.h> 47 #include <sys/ata.h> 48 #include <dev/ata/ata-all.h> 49 50 #include <dev/ofw/openfirm.h> 51 #include <powerpc/psim/iobusvar.h> 52 53 /* 54 * Define the iobus ata bus attachment. This creates a pseudo-bus that 55 * the ATA device can be attached to 56 */ 57 static int ata_iobus_attach(device_t dev); 58 static int ata_iobus_probe(device_t dev); 59 static int ata_iobus_print_child(device_t dev, device_t child); 60 struct resource *ata_iobus_alloc_resource(device_t, device_t, int, int *, 61 u_long, u_long, u_long, u_int); 62 static int ata_iobus_release_resource(device_t, device_t, int, int, 63 struct resource *); 64 65 static device_method_t ata_iobus_methods[] = { 66 /* Device interface */ 67 DEVMETHOD(device_probe, ata_iobus_probe), 68 DEVMETHOD(device_attach, ata_iobus_attach), 69 DEVMETHOD(device_shutdown, bus_generic_shutdown), 70 DEVMETHOD(device_suspend, bus_generic_suspend), 71 DEVMETHOD(device_resume, bus_generic_resume), 72 73 /* Bus methods */ 74 DEVMETHOD(bus_print_child, ata_iobus_print_child), 75 DEVMETHOD(bus_alloc_resource, ata_iobus_alloc_resource), 76 DEVMETHOD(bus_release_resource, ata_iobus_release_resource), 77 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 78 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 79 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 80 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 81 82 { 0, 0 } 83 }; 84 85 static driver_t ata_iobus_driver = { 86 "ataiobus", 87 ata_iobus_methods, 88 0, 89 }; 90 91 static devclass_t ata_iobus_devclass; 92 93 DRIVER_MODULE(ataiobus, iobus, ata_iobus_driver, ata_iobus_devclass, 0, 0); 94 95 96 static int 97 ata_iobus_probe(device_t dev) 98 { 99 char *type = iobus_get_name(dev); 100 101 if (strncmp(type, "ata", 3) != 0) 102 return (ENXIO); 103 104 device_set_desc(dev, "PSIM ATA Controller"); 105 return (0); 106 } 107 108 109 static int 110 ata_iobus_attach(device_t dev) 111 { 112 /* 113 * Add a single child per controller. Should be able 114 * to add two 115 */ 116 device_add_child(dev, "ata", 117 devclass_find_free_unit(ata_devclass, 0)); 118 119 return (bus_generic_attach(dev)); 120 } 121 122 123 static int 124 ata_iobus_print_child(device_t dev, device_t child) 125 { 126 int retval = 0; 127 128 retval += bus_print_child_header(dev, child); 129 /* irq ? */ 130 retval += bus_print_child_footer(dev, child); 131 132 return (retval); 133 } 134 135 136 struct resource * 137 ata_iobus_alloc_resource(device_t dev, device_t child, int type, int *rid, 138 u_long start, u_long end, u_long count, u_int flags) 139 { 140 struct resource *res = NULL; 141 int myrid; 142 u_int *ofw_regs; 143 144 ofw_regs = iobus_get_regs(dev); 145 146 /* 147 * The reg array for the PSIM ata device has 6 start/size entries: 148 * 0 - unused 149 * 1/2/3 - unused 150 * 4/5/6 - primary command 151 * 7/8/9 - secondary command 152 * 10/11/12 - primary control 153 * 13/14/15 - secondary control 154 * 16/17/18 - primary/secondary dma registers, unimplemented 155 * 156 * The resource values are calculated from these registers 157 */ 158 if (type == SYS_RES_IOPORT) { 159 switch (*rid) { 160 case ATA_IOADDR_RID: 161 myrid = 0; 162 start = ofw_regs[4]; 163 end = start + ATA_IOSIZE - 1; 164 count = ATA_IOSIZE; 165 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), child, 166 SYS_RES_MEMORY, &myrid, 167 start, end, count, flags); 168 break; 169 170 case ATA_ALTADDR_RID: 171 myrid = 0; 172 start = ofw_regs[10]; 173 end = start + ATA_ALTIOSIZE - 1; 174 count = ATA_ALTIOSIZE; 175 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), child, 176 SYS_RES_MEMORY, &myrid, 177 start, end, count, flags); 178 break; 179 180 case ATA_BMADDR_RID: 181 /* DMA not properly supported by psim */ 182 break; 183 } 184 return (res); 185 186 } else if (type == SYS_RES_IRQ && *rid == ATA_IRQ_RID) { 187 /* 188 * Pass this on to the parent 189 */ 190 return (BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, 191 SYS_RES_IRQ, rid, 0, ~0, 1, flags)); 192 193 } else { 194 return (NULL); 195 } 196 } 197 198 199 static int 200 ata_iobus_release_resource(device_t dev, device_t child, int type, int rid, 201 struct resource *r) 202 { 203 /* no hotplug... */ 204 return (0); 205 } 206 207 208 /* 209 * Define the actual ATA device. This is a sub-bus to the ata-iobus layer 210 * to allow the higher layer bus to massage the resource allocation. 211 */ 212 213 static int ata_iobus_sub_probe(device_t dev); 214 215 static device_method_t ata_iobus_sub_methods[] = { 216 /* Device interface */ 217 DEVMETHOD(device_probe, ata_iobus_sub_probe), 218 DEVMETHOD(device_attach, ata_attach), 219 DEVMETHOD(device_detach, ata_detach), 220 DEVMETHOD(device_resume, ata_resume), 221 222 { 0, 0 } 223 }; 224 225 static driver_t ata_iobus_sub_driver = { 226 "ata", 227 ata_iobus_sub_methods, 228 sizeof(struct ata_channel), 229 }; 230 231 DRIVER_MODULE(ata, ataiobus, ata_iobus_sub_driver, ata_devclass, 0, 0); 232 233 static void 234 ata_iobus_locknoop(struct ata_channel *ch, int type) 235 { 236 } 237 238 static void 239 ata_iobus_setmode(struct ata_device *atadev, int mode) 240 { 241 atadev->mode = ATA_PIO; 242 } 243 244 static int 245 ata_iobus_sub_probe(device_t dev) 246 { 247 struct ata_channel *ch = device_get_softc(dev); 248 249 /* Only a single unit per controller thus far */ 250 ch->unit = 0; 251 ch->flags = (ATA_USE_16BIT|ATA_NO_SLAVE); 252 ch->locking = ata_iobus_locknoop; 253 ch->device[MASTER].setmode = ata_iobus_setmode; 254 ch->device[SLAVE].setmode = ata_iobus_setmode; 255 256 return ata_probe(dev); 257 } 258