1 /* $NetBSD: iop_pci.c,v 1.23 2008/04/28 20:23:55 martin Exp $ */ 2 3 /*- 4 * Copyright (c) 2000, 2001, 2002 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Andrew Doran. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * PCI front-end for `iop' driver. 34 */ 35 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: iop_pci.c,v 1.23 2008/04/28 20:23:55 martin Exp $"); 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/kernel.h> 42 #include <sys/device.h> 43 #include <sys/queue.h> 44 #include <sys/proc.h> 45 46 #include <machine/endian.h> 47 #include <sys/bus.h> 48 49 #include <dev/pci/pcidevs.h> 50 #include <dev/pci/pcivar.h> 51 52 #include <dev/i2o/i2o.h> 53 #include <dev/i2o/iopreg.h> 54 #include <dev/i2o/iopio.h> 55 #include <dev/i2o/iopvar.h> 56 57 #define PCI_INTERFACE_I2O_POLLED 0x00 58 #define PCI_INTERFACE_I2O_INTRDRIVEN 0x01 59 60 static void iop_pci_attach(struct device *, struct device *, void *); 61 static int iop_pci_match(struct device *, struct cfdata *, void *); 62 63 CFATTACH_DECL(iop_pci, sizeof(struct iop_softc), 64 iop_pci_match, iop_pci_attach, NULL, NULL); 65 66 static int 67 iop_pci_match(struct device *parent, struct cfdata *match, 68 void *aux) 69 { 70 struct pci_attach_args *pa; 71 u_int product, vendor; 72 pcireg_t reg; 73 74 pa = aux; 75 76 /* 77 * Look for an "intelligent I/O processor" that adheres to the I2O 78 * specification. Ignore the device if it doesn't support interrupt 79 * driven operation. 80 */ 81 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_I2O && 82 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_I2O_STANDARD && 83 PCI_INTERFACE(pa->pa_class) == PCI_INTERFACE_I2O_INTRDRIVEN) 84 return (1); 85 86 /* 87 * Match boards that don't conform exactly to the spec. 88 */ 89 vendor = PCI_VENDOR(pa->pa_id); 90 product = PCI_PRODUCT(pa->pa_id); 91 92 if (vendor == PCI_VENDOR_DPT && 93 (product == PCI_PRODUCT_DPT_RAID_I2O || 94 product == PCI_PRODUCT_DPT_RAID_2005S)) 95 return (1); 96 97 if (vendor == PCI_VENDOR_INTEL && 98 (product == PCI_PRODUCT_INTEL_80960RM_2 || 99 product == PCI_PRODUCT_INTEL_80960_RP)) { 100 reg = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_SUBSYS_ID_REG); 101 if (PCI_VENDOR(reg) == PCI_VENDOR_PROMISE) 102 return (1); 103 } 104 105 return (0); 106 } 107 108 static void 109 iop_pci_attach(struct device *parent, struct device *self, void *aux) 110 { 111 struct pci_attach_args *pa; 112 struct iop_softc *sc; 113 pci_chipset_tag_t pc; 114 pci_intr_handle_t ih; 115 const char *intrstr; 116 pcireg_t reg; 117 int i; 118 119 sc = (struct iop_softc *)self; 120 pa = (struct pci_attach_args *)aux; 121 pc = pa->pa_pc; 122 printf(": "); 123 124 /* 125 * The kernel always uses the first memory mapping to communicate 126 * with the IOP. 127 */ 128 for (i = PCI_MAPREG_START; i < PCI_MAPREG_END; i += 4) { 129 reg = pci_conf_read(pc, pa->pa_tag, i); 130 if (PCI_MAPREG_TYPE(reg) == PCI_MAPREG_TYPE_MEM) { 131 sc->sc_memaddr = PCI_MAPREG_MEM_ADDR(reg); 132 break; 133 } 134 } 135 if (i == PCI_MAPREG_END) { 136 printf("can't find mapping\n"); 137 return; 138 } 139 140 /* Map the register window. */ 141 if (pci_mapreg_map(pa, i, PCI_MAPREG_TYPE_MEM, 0, &sc->sc_iot, 142 &sc->sc_ioh, NULL, NULL)) { 143 aprint_error_dev(&sc->sc_dv, "can't map register window\n"); 144 return; 145 } 146 147 /* Map the 2nd register window. */ 148 if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_DPT && 149 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_DPT_RAID_2005S) { 150 i += 4; /* next BAR */ 151 if (i == PCI_MAPREG_END) { 152 printf("can't find mapping\n"); 153 return; 154 } 155 156 #if 0 157 /* Should we check it? (see FreeBSD's asr driver) */ 158 reg = pci_conf_read(pc, pa->pa_tag, PCI_SUBSYS_ID_REG); 159 printf("subid %x, %x\n", PCI_VENDOR(reg), PCI_PRODUCT(reg)); 160 #endif 161 if (pci_mapreg_map(pa, i, PCI_MAPREG_TYPE_MEM, 0, 162 &sc->sc_msg_iot, &sc->sc_msg_ioh, NULL, NULL)) { 163 aprint_error_dev(&sc->sc_dv, "can't map 2nd register window\n"); 164 return; 165 } 166 } else { 167 /* iop devices other than 2005S */ 168 sc->sc_msg_iot = sc->sc_iot; 169 sc->sc_msg_ioh = sc->sc_ioh; 170 } 171 172 sc->sc_pcibus = pa->pa_bus; 173 sc->sc_pcidev = pa->pa_device; 174 sc->sc_dmat = pa->pa_dmat; 175 sc->sc_bus_memt = pa->pa_memt; 176 sc->sc_bus_iot = pa->pa_iot; 177 178 /* Enable the device. */ 179 reg = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG); 180 pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG, 181 reg | PCI_COMMAND_MASTER_ENABLE); 182 183 /* Map and establish the interrupt.. */ 184 if (pci_intr_map(pa, &ih)) { 185 printf("can't map interrupt\n"); 186 return; 187 } 188 intrstr = pci_intr_string(pc, ih); 189 sc->sc_ih = pci_intr_establish(pc, ih, IPL_BIO, iop_intr, sc); 190 if (sc->sc_ih == NULL) { 191 printf("can't establish interrupt"); 192 if (intrstr != NULL) 193 printf(" at %s", intrstr); 194 printf("\n"); 195 return; 196 } 197 198 /* Attach to the bus-independent code. */ 199 iop_init(sc, intrstr); 200 } 201