ata-cbus.c revision 107562
1/*- 2 * Copyright (c) 2002 S�ren Schmidt <sos@FreeBSD.org> 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 the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * $FreeBSD: head/sys/dev/ata/ata-cbus.c 107562 2002-12-03 20:20:44Z sos $ 29 */ 30 31#include "opt_ata.h" 32#include <sys/param.h> 33#include <sys/systm.h> 34#include <sys/kernel.h> 35#include <sys/bus.h> 36#include <sys/malloc.h> 37#include <machine/resource.h> 38#include <machine/bus.h> 39#include <sys/rman.h> 40#include <isa/isavar.h> 41#include <dev/ata/ata-all.h> 42 43/* local vars */ 44static bus_addr_t ata_pc98_ports[] = { 45 0x0, 0x2, 0x4, 0x6, 0x8, 0xa, 0xc, 0xe 46}; 47 48struct ata_cbus_controller { 49 struct resource *io; 50 struct resource *altio; 51 struct resource *bankio; 52 struct resource *irq; 53 int current_bank; 54}; 55 56static int 57ata_cbus_probe(device_t dev) 58{ 59 struct resource *io; 60 int rid; 61 u_long tmp; 62 63 /* allocate the ioport range */ 64 rid = ATA_IOADDR_RID; 65 io = isa_alloc_resourcev(dev, SYS_RES_IOPORT, &rid, ata_pc98_ports, 66 ATA_IOSIZE, RF_ACTIVE); 67 if (!io) 68 return ENOMEM; 69 isa_load_resourcev(io, ata_pc98_ports, ATA_IOSIZE); 70 71 /* calculate & set the altport range */ 72 rid = ATA_PC98_ALTADDR_RID; 73 if (bus_get_resource(dev, SYS_RES_IOPORT, rid, &tmp, &tmp)) { 74 bus_set_resource(dev, SYS_RES_IOPORT, rid, 75 rman_get_start(io)+ATA_PC98_ALTOFFSET, ATA_ALTIOSIZE); 76 } 77 78 /* calculate & set the bank range */ 79 rid = ATA_PC98_BANKADDR_RID; 80 if (bus_get_resource(dev, SYS_RES_IOPORT, rid, &tmp, &tmp)) { 81 bus_set_resource(dev, SYS_RES_IOPORT, rid, 82 ATA_PC98_BANK, ATA_PC98_BANKIOSIZE); 83 } 84 85 bus_release_resource(dev, SYS_RES_IOPORT, ATA_IOADDR_RID, io); 86 return 0; 87} 88 89static int 90ata_cbus_attach(device_t dev) 91{ 92 struct ata_cbus_controller *scp = device_get_softc(dev); 93 int rid; 94 95 /* allocate resources */ 96 rid = ATA_IOADDR_RID; 97 scp->io = isa_alloc_resourcev(dev, SYS_RES_IOPORT, &rid, ata_pc98_ports, 98 ATA_IOSIZE, RF_ACTIVE); 99 if (!scp->io) 100 return ENOMEM; 101 102 isa_load_resourcev(scp->io, ata_pc98_ports, ATA_IOSIZE); 103 104 rid = ATA_PC98_ALTADDR_RID; 105 scp->altio = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 106 rman_get_start(scp->io)+ATA_PC98_ALTOFFSET, 107 ~0, ATA_ALTIOSIZE, RF_ACTIVE); 108 if (!scp->altio) 109 return ENOMEM; 110 111 rid = ATA_PC98_BANKADDR_RID; 112 scp->bankio = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 113 ATA_PC98_BANK, ~0, 114 ATA_PC98_BANKIOSIZE, RF_ACTIVE); 115 if (!scp->bankio) 116 return ENOMEM; 117 118 rid = 0; 119 scp->irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 120 0, ~0, 1, RF_ACTIVE | RF_SHAREABLE); 121 122 scp->current_bank = -1; 123 if (!device_add_child(dev, "ata", 0)) 124 return ENOMEM; 125 if (!device_add_child(dev, "ata", 1)) 126 return ENOMEM; 127 128 return bus_generic_attach(dev); 129} 130 131static struct resource * 132ata_cbus_alloc_resource(device_t dev, device_t child, int type, int *rid, 133 u_long start, u_long end, u_long count, u_int flags) 134{ 135 struct ata_cbus_controller *scp = device_get_softc(dev); 136 137 if (type == SYS_RES_IOPORT) { 138 switch (*rid) { 139 case ATA_IOADDR_RID: 140 return scp->io; 141 case ATA_ALTADDR_RID: 142 return scp->altio; 143 } 144 } 145 if (type == SYS_RES_IRQ) { 146 return scp->irq; 147 } 148 return 0; 149} 150 151static int 152ata_cbus_setup_intr(device_t dev, device_t child, struct resource *irq, 153 int flags, driver_intr_t *intr, void *arg, 154 void **cookiep) 155{ 156 return BUS_SETUP_INTR(device_get_parent(dev), dev, irq, 157 flags, intr, arg, cookiep); 158} 159 160static int 161ata_cbus_print_child(device_t dev, device_t child) 162{ 163 struct ata_channel *ch = device_get_softc(child); 164 int retval = 0; 165 166 retval += bus_print_child_header(dev, child); 167 retval += printf(" at bank %d", ch->unit); 168 retval += bus_print_child_footer(dev, child); 169 return retval; 170} 171 172static int 173ata_cbus_intr(struct ata_channel *ch) 174{ 175 struct ata_cbus_controller *scp = 176 device_get_softc(device_get_parent(ch->dev)); 177 178 return (ch->unit == scp->current_bank); 179} 180 181static void 182ata_cbus_banking(struct ata_channel *ch, int flags) 183{ 184 struct ata_cbus_controller *scp = 185 device_get_softc(device_get_parent(ch->dev)); 186 187 switch (flags) { 188 case ATA_LF_LOCK: 189 if (scp->current_bank == ch->unit) 190 break; 191 while (!atomic_cmpset_acq_int(&scp->current_bank, -1, ch->unit)) 192 tsleep((caddr_t)ch->lock_func, PRIBIO, "atalck", 1); 193 bus_space_write_1(rman_get_bustag(scp->bankio), 194 rman_get_bushandle(scp->bankio), 0, ch->unit); 195 break; 196 197 case ATA_LF_UNLOCK: 198 if (scp->current_bank == -1 || scp->current_bank != ch->unit) 199 break; 200 atomic_store_rel_int(&scp->current_bank, -1); 201 break; 202 } 203 return; 204} 205 206static device_method_t ata_cbus_methods[] = { 207 /* device_interface */ 208 DEVMETHOD(device_probe, ata_cbus_probe), 209 DEVMETHOD(device_attach, ata_cbus_attach), 210 211 /* bus methods */ 212 DEVMETHOD(bus_alloc_resource, ata_cbus_alloc_resource), 213 DEVMETHOD(bus_setup_intr, ata_cbus_setup_intr), 214 DEVMETHOD(bus_print_child, ata_cbus_print_child), 215 { 0, 0 } 216}; 217 218static driver_t ata_cbus_driver = { 219 "atacbus", 220 ata_cbus_methods, 221 sizeof(struct ata_cbus_controller), 222}; 223 224static devclass_t ata_cbus_devclass; 225 226DRIVER_MODULE(atacbus, isa, ata_cbus_driver, ata_cbus_devclass, 0, 0); 227 228static int 229ata_cbussub_probe(device_t dev) 230{ 231 struct ata_channel *ch = device_get_softc(dev); 232 device_t *children; 233 int count, i; 234 235 /* find channel number on this controller */ 236 device_get_children(device_get_parent(dev), &children, &count); 237 for (i = 0; i < count; i++) { 238 if (children[i] == dev) 239 ch->unit = i; 240 } 241 free(children, M_TEMP); 242 ch->flags |= ATA_USE_16BIT; 243 ch->intr_func = ata_cbus_intr; 244 ch->lock_func = ata_cbus_banking; 245 return ata_probe(dev); 246} 247 248static device_method_t ata_cbussub_methods[] = { 249 /* device interface */ 250 DEVMETHOD(device_probe, ata_cbussub_probe), 251 DEVMETHOD(device_attach, ata_attach), 252 DEVMETHOD(device_detach, ata_detach), 253 DEVMETHOD(device_resume, ata_resume), 254 { 0, 0 } 255}; 256 257static driver_t ata_cbussub_driver = { 258 "ata", 259 ata_cbussub_methods, 260 sizeof(struct ata_channel), 261}; 262 263DRIVER_MODULE(ata, atacbus, ata_cbussub_driver, ata_devclass, 0, 0); 264