bt_pci.c revision 45791
1/* 2 * Product specific probe and attach routines for: 3 * Buslogic BT946, BT948, BT956, BT958 SCSI controllers 4 * 5 * Copyright (c) 1995, 1997, 1998 Justin T. Gibbs 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions, and the following disclaimer, 13 * without modification, immediately at the beginning of the file. 14 * 2. 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 AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $Id: bt_pci.c,v 1.4 1998/12/14 06:32:54 dillon Exp $ 30 */ 31 32#include "pci.h" 33#if NPCI > 0 34#include <sys/param.h> 35#include <sys/systm.h> 36#include <sys/kernel.h> 37#include <sys/bus.h> 38 39#include <pci/pcireg.h> 40#include <pci/pcivar.h> 41 42#include <machine/bus_memio.h> 43#include <machine/bus_pio.h> 44#include <machine/bus.h> 45#include <machine/resource.h> 46#include <sys/rman.h> 47 48#include <dev/buslogic/btreg.h> 49 50#define BT_PCI_IOADDR PCIR_MAPS 51#define BT_PCI_MEMADDR PCIR_MAPS + 4 52 53#define PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER 0x1040104Bul 54#define PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER_NC 0x0140104Bul 55#define PCI_DEVICE_ID_BUSLOGIC_FLASHPOINT 0x8130104Bul 56 57static int 58bt_pci_alloc_resources(device_t dev) 59{ 60 int command, type = 0, rid, zero; 61 struct resource *regs = 0; 62 struct resource *irq = 0; 63 64 command = pci_read_config(dev, PCIR_COMMAND, /*bytes*/1); 65#if 0 66 /* XXX Memory Mapped I/O seems to cause problems */ 67 if (command & PCIM_CMD_MEMEN) { 68 type = SYS_RES_MEMORY; 69 rid = BT_PCI_MEMADDR; 70 regs = bus_alloc_resource(dev, type, &rid, 71 0, ~0, 1, RF_ACTIVE); 72 } 73#else 74 if (!regs && (command & PCIM_CMD_PORTEN)) { 75 type = SYS_RES_IOPORT; 76 rid = BT_PCI_IOADDR; 77 regs = bus_alloc_resource(dev, type, &rid, 78 0, ~0, 1, RF_ACTIVE); 79 } 80#endif 81 if (!regs) 82 return (ENOMEM); 83 84 zero = 0; 85 irq = bus_alloc_resource(dev, SYS_RES_IRQ, &zero, 86 0, ~0, 1, RF_ACTIVE | RF_SHAREABLE); 87 if (!irq) { 88 bus_release_resource(dev, type, rid, regs); 89 return (ENOMEM); 90 } 91 92 bt_init_softc(dev, regs, irq, 0); 93 94 return (0); 95} 96 97static void 98bt_pci_release_resources(device_t dev) 99{ 100 struct bt_softc *bt = device_get_softc(dev); 101 102 if (bt->port) 103 /* XXX can't cope with memory registers anyway */ 104 bus_release_resource(dev, SYS_RES_IOPORT, 105 BT_PCI_IOADDR, bt->port); 106 if (bt->irq) 107 bus_release_resource(dev, SYS_RES_IOPORT, 0, bt->irq); 108 bt_free_softc(dev); 109} 110 111static int 112bt_pci_probe(device_t dev) 113{ 114 switch (pci_get_devid(dev)) { 115 case PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER: 116 case PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER_NC: 117 { 118 struct bt_softc *bt = device_get_softc(dev); 119 pci_info_data_t pci_info; 120 int error; 121 122 error = bt_pci_alloc_resources(dev); 123 if (error) 124 return (error); 125 126 /* 127 * Determine if an ISA compatible I/O port has been 128 * enabled. If so, record the port so it will not 129 * be probed by our ISA probe. If the PCI I/O port 130 * was not set to the compatibility port, disable it. 131 */ 132 error = bt_cmd(bt, BOP_INQUIRE_PCI_INFO, 133 /*param*/NULL, /*paramlen*/0, 134 (u_int8_t*)&pci_info, sizeof(pci_info), 135 DEFAULT_CMD_TIMEOUT); 136 if (error == 0 137 && pci_info.io_port < BIO_DISABLED) { 138 bt_mark_probed_bio(pci_info.io_port); 139 if (bt->bsh != bt_iop_from_bio(pci_info.io_port)) { 140 u_int8_t new_addr; 141 142 new_addr = BIO_DISABLED; 143 bt_cmd(bt, BOP_MODIFY_IO_ADDR, 144 /*param*/&new_addr, 145 /*paramlen*/1, /*reply_buf*/NULL, 146 /*reply_len*/0, 147 DEFAULT_CMD_TIMEOUT); 148 } 149 } 150 bt_pci_release_resources(dev); 151 device_set_desc(dev, "Buslogic Multi-Master SCSI Host Adapter"); 152 return (0); 153 } 154 default: 155 break; 156 } 157 158 return (ENXIO); 159} 160 161static int 162bt_pci_attach(device_t dev) 163{ 164 struct bt_softc *bt = device_get_softc(dev); 165 int opri; 166 int error; 167 168 /* Initialise softc */ 169 error = bt_pci_alloc_resources(dev); 170 if (error) { 171 device_printf(dev, "can't allocate resources in bt_pci_attach\n"); 172 return error; 173 } 174 175 /* Allocate a dmatag for our CCB DMA maps */ 176 /* XXX Should be a child of the PCI bus dma tag */ 177 if (bus_dma_tag_create(/*parent*/NULL, /*alignemnt*/0, /*boundary*/0, 178 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT, 179 /*highaddr*/BUS_SPACE_MAXADDR, 180 /*filter*/NULL, /*filterarg*/NULL, 181 /*maxsize*/BUS_SPACE_MAXSIZE_32BIT, 182 /*nsegments*/BUS_SPACE_UNRESTRICTED, 183 /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT, 184 /*flags*/0, &bt->parent_dmat) != 0) { 185 bt_pci_release_resources(dev); 186 return (ENOMEM); 187 } 188 189 /* 190 * Protect ourself from spurrious interrupts during 191 * intialization and attach. We should really rely 192 * on interrupts during attach, but we don't have 193 * access to our interrupts during ISA probes, so until 194 * that changes, we mask our interrupts during attach 195 * too. 196 */ 197 opri = splcam(); 198 199 if (bt_probe(dev) || bt_fetch_adapter_info(dev) || bt_init(dev)) { 200 bt_pci_release_resources(dev); 201 splx(opri); 202 return (ENXIO); 203 } 204 205 error = bt_attach(dev); 206 splx(opri); 207 208 if (error) { 209 bt_pci_release_resources(dev); 210 return (error); 211 } 212 213 return (0); 214} 215 216static device_method_t bt_pci_methods[] = { 217 /* Device interface */ 218 DEVMETHOD(device_probe, bt_pci_probe), 219 DEVMETHOD(device_attach, bt_pci_attach), 220 221 { 0, 0 } 222}; 223 224static driver_t bt_pci_driver = { 225 "bt", 226 bt_pci_methods, 227 DRIVER_TYPE_CAM, 228 sizeof(struct bt_softc), 229}; 230 231static devclass_t bt_devclass; 232 233DRIVER_MODULE(bt, pci, bt_pci_driver, bt_devclass, 0, 0); 234 235#endif /* NPCI > 0 */ 236