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 <machine/stdarg.h> 41 #include <machine/resource.h> 42 #include <machine/bus.h> 43 #include <sys/rman.h> 44 #include <sys/ata.h> 45 #include <dev/ata/ata-all.h> 46 47 #include <dev/ofw/openfirm.h> 48 #include <powerpc/psim/iobusvar.h> 49 50 /* 51 * Define the iobus ata bus attachment. This creates a pseudo-bus that 52 * the ATA device can be attached to 53 */ 54 static int ata_iobus_attach(device_t dev); 55 static int ata_iobus_probe(device_t dev); 56 static int ata_iobus_print_child(device_t dev, device_t child); 57 struct resource *ata_iobus_alloc_resource(device_t, device_t, int, int *, 58 u_long, u_long, u_long, u_int); 59 static int ata_iobus_release_resource(device_t, device_t, int, int, 60 struct resource *); 61 62 static device_method_t ata_iobus_methods[] = { 63 /* Device interface */ 64 DEVMETHOD(device_probe, ata_iobus_probe), 65 DEVMETHOD(device_attach, ata_iobus_attach), 66 DEVMETHOD(device_shutdown, bus_generic_shutdown), 67 DEVMETHOD(device_suspend, bus_generic_suspend), 68 DEVMETHOD(device_resume, bus_generic_resume), 69 70 /* Bus methods */ 71 DEVMETHOD(bus_print_child, ata_iobus_print_child), 72 DEVMETHOD(bus_alloc_resource, ata_iobus_alloc_resource), 73 DEVMETHOD(bus_release_resource, ata_iobus_release_resource), 74 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 75 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 76 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 77 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 78 79 { 0, 0 } 80 }; 81 82 static driver_t ata_iobus_driver = { 83 "ataiobus", 84 ata_iobus_methods, 85 0, 86 }; 87 88 static devclass_t ata_iobus_devclass; 89 90 DRIVER_MODULE(ataiobus, iobus, ata_iobus_driver, ata_iobus_devclass, 0, 0); 91 92 93 static int 94 ata_iobus_probe(device_t dev) 95 { 96 char *type = iobus_get_name(dev); 97 98 if (strncmp(type, "ata", 3) != 0) 99 return (ENXIO); 100 101 device_set_desc(dev, "PSIM ATA Controller"); 102 return (0); 103 } 104 105 106 static int 107 ata_iobus_attach(device_t dev) 108 { 109 /* 110 * Add a single child per controller. Should be able 111 * to add two 112 */ 113 device_add_child(dev, "ata", 114 devclass_find_free_unit(ata_devclass, 0)); 115 116 return (bus_generic_attach(dev)); 117 } 118 119 120 static int 121 ata_iobus_print_child(device_t dev, device_t child) 122 { 123 struct ata_channel *ch = device_get_softc(child); 124 int retval = 0; 125 126 retval += bus_print_child_header(dev, child); 127 retval += printf(": at 0x%lx", rman_get_start(ch->r_io)); 128 /* irq ? */ 129 retval += bus_print_child_footer(dev, child); 130 131 return (retval); 132 } 133 134 135 struct resource * 136 ata_iobus_alloc_resource(device_t dev, device_t child, int type, int *rid, 137 u_long start, u_long end, u_long count, u_int flags) 138 { 139 struct resource *res = NULL; 140 int myrid; 141 u_int *ofw_regs; 142 143 ofw_regs = iobus_get_regs(dev); 144 145 /* 146 * The reg array for the PSIM ata device has 6 start/size entries: 147 * 0 - unused 148 * 1/2/3 - unused 149 * 4/5/6 - primary command 150 * 7/8/9 - secondary command 151 * 10/11/12 - primary control 152 * 13/14/15 - secondary control 153 * 16/17/18 - primary/secondary dma registers, unimplemented 154 * 155 * The resource values are calculated from these registers 156 */ 157 if (type == SYS_RES_IOPORT) { 158 switch (*rid) { 159 case ATA_IOADDR_RID: 160 myrid = 0; 161 start = ofw_regs[4]; 162 end = start + ATA_IOSIZE - 1; 163 count = ATA_IOSIZE; 164 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), child, 165 SYS_RES_MEMORY, &myrid, 166 start, end, count, flags); 167 break; 168 169 case ATA_ALTADDR_RID: 170 myrid = 0; 171 start = ofw_regs[10]; 172 end = start + ATA_ALTIOSIZE - 1; 173 count = ATA_ALTIOSIZE; 174 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), child, 175 SYS_RES_MEMORY, &myrid, 176 start, end, count, flags); 177 break; 178 179 case ATA_BMADDR_RID: 180 /* DMA not properly supported by psim */ 181 break; 182 } 183 return (res); 184 185 } else if (type == SYS_RES_IRQ && *rid == ATA_IRQ_RID) { 186 /* 187 * Pass this on to the parent 188 */ 189 return (BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, 190 SYS_RES_IRQ, rid, 0, ~0, 1, flags)); 191 192 } else { 193 return (NULL); 194 } 195 } 196 197 198 static int 199 ata_iobus_release_resource(device_t dev, device_t child, int type, int rid, 200 struct resource *r) 201 { 202 /* no hotplug... */ 203 return (0); 204 } 205 206 207 /* 208 * Define the actual ATA device. This is a sub-bus to the ata-iobus layer 209 * to allow the higher layer bus to massage the resource allocation. 210 */ 211 212 static int ata_iobus_sub_probe(device_t dev); 213 214 static device_method_t ata_iobus_sub_methods[] = { 215 /* Device interface */ 216 DEVMETHOD(device_probe, ata_iobus_sub_probe), 217 DEVMETHOD(device_attach, ata_attach), 218 DEVMETHOD(device_detach, ata_detach), 219 DEVMETHOD(device_resume, ata_resume), 220 221 { 0, 0 } 222 }; 223 224 static driver_t ata_iobus_sub_driver = { 225 "ata", 226 ata_iobus_sub_methods, 227 sizeof(struct ata_channel), 228 }; 229 230 DRIVER_MODULE(ata, ataiobus, ata_iobus_sub_driver, ata_devclass, 0, 0); 231 232 static void 233 ata_iobus_locknoop(struct ata_channel *ch, int type) 234 { 235 } 236 237 static void 238 ata_iobus_setmode(struct ata_device *atadev, int mode) 239 { 240 atadev->mode = ATA_PIO; 241 } 242 243 static int 244 ata_iobus_sub_probe(device_t dev) 245 { 246 struct ata_channel *ch = device_get_softc(dev); 247 248 /* Only a single unit per controller thus far */ 249 ch->unit = 0; 250 ch->flags = (ATA_USE_16BIT|ATA_NO_SLAVE); 251 ch->locking = ata_iobus_locknoop; 252 ch->device[MASTER].setmode = ata_iobus_setmode; 253 ch->device[SLAVE].setmode = ata_iobus_setmode; 254 255 return ata_probe(dev); 256 } 257