1 /* $NetBSD: iop_pci.c,v 1.26 2009/05/12 08:23:01 cegger 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 1.26 2009/05/12 08:23:01 cegger 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(device_t, device_t, void *); 61 static int iop_pci_match(device_t, cfdata_t, 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(device_t parent, cfdata_t match, void *aux) 68 { 69 struct pci_attach_args *pa; 70 u_int product, vendor; 71 pcireg_t reg; 72 73 pa = aux; 74 75 /* 76 * Look for an "intelligent I/O processor" that adheres to the I2O 77 * specification. Ignore the device if it doesn't support interrupt 78 * driven operation. 79 */ 80 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_I2O && 81 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_I2O_STANDARD && 82 PCI_INTERFACE(pa->pa_class) == PCI_INTERFACE_I2O_INTRDRIVEN) 83 return (1); 84 85 /* 86 * Match boards that don't conform exactly to the spec. 87 */ 88 vendor = PCI_VENDOR(pa->pa_id); 89 product = PCI_PRODUCT(pa->pa_id); 90 91 if (vendor == PCI_VENDOR_DPT && 92 (product == PCI_PRODUCT_DPT_RAID_I2O || 93 product == PCI_PRODUCT_DPT_RAID_2005S)) 94 return (1); 95 96 if (vendor == PCI_VENDOR_INTEL && 97 (product == PCI_PRODUCT_INTEL_80960RM_2 || 98 product == PCI_PRODUCT_INTEL_80960_RP)) { 99 reg = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_SUBSYS_ID_REG); 100 if (PCI_VENDOR(reg) == PCI_VENDOR_PROMISE) 101 return (1); 102 } 103 104 return (0); 105 } 106 107 static void 108 iop_pci_attach(device_t parent, device_t self, void *aux) 109 { 110 struct pci_attach_args *pa; 111 struct iop_softc *sc; 112 pci_chipset_tag_t pc; 113 pci_intr_handle_t ih; 114 const char *intrstr; 115 pcireg_t reg; 116 int i; 117 118 sc = device_private(self); 119 pa = (struct pci_attach_args *)aux; 120 pc = pa->pa_pc; 121 printf(": "); 122 123 /* 124 * The kernel always uses the first memory mapping to communicate 125 * with the IOP. 126 */ 127 for (i = PCI_MAPREG_START; i < PCI_MAPREG_END; i += 4) { 128 reg = pci_conf_read(pc, pa->pa_tag, i); 129 if (PCI_MAPREG_TYPE(reg) == PCI_MAPREG_TYPE_MEM) { 130 sc->sc_memaddr = PCI_MAPREG_MEM_ADDR(reg); 131 break; 132 } 133 } 134 if (i == PCI_MAPREG_END) { 135 printf("can't find mapping\n"); 136 return; 137 } 138 139 /* Map the register window. */ 140 if (pci_mapreg_map(pa, i, PCI_MAPREG_TYPE_MEM, 0, &sc->sc_iot, 141 &sc->sc_ioh, NULL, NULL)) { 142 aprint_error_dev(&sc->sc_dv, "can't map register window\n"); 143 return; 144 } 145 146 /* Map the 2nd register window. */ 147 if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_DPT && 148 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_DPT_RAID_2005S) { 149 i += 4; /* next BAR */ 150 if (i == PCI_MAPREG_END) { 151 printf("can't find mapping\n"); 152 return; 153 } 154 155 #if 0 156 /* Should we check it? (see FreeBSD's asr driver) */ 157 reg = pci_conf_read(pc, pa->pa_tag, PCI_SUBSYS_ID_REG); 158 printf("subid %x, %x\n", PCI_VENDOR(reg), PCI_PRODUCT(reg)); 159 #endif 160 if (pci_mapreg_map(pa, i, PCI_MAPREG_TYPE_MEM, 0, 161 &sc->sc_msg_iot, &sc->sc_msg_ioh, NULL, NULL)) { 162 aprint_error_dev(&sc->sc_dv, "can't map 2nd register window\n"); 163 return; 164 } 165 } else { 166 /* iop devices other than 2005S */ 167 sc->sc_msg_iot = sc->sc_iot; 168 sc->sc_msg_ioh = sc->sc_ioh; 169 } 170 171 sc->sc_pcibus = pa->pa_bus; 172 sc->sc_pcidev = pa->pa_device; 173 sc->sc_dmat = pa->pa_dmat; 174 sc->sc_bus_memt = pa->pa_memt; 175 sc->sc_bus_iot = pa->pa_iot; 176 177 /* Enable the device. */ 178 reg = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG); 179 pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG, 180 reg | PCI_COMMAND_MASTER_ENABLE); 181 182 /* Map and establish the interrupt.. */ 183 if (pci_intr_map(pa, &ih)) { 184 printf("can't map interrupt\n"); 185 return; 186 } 187 intrstr = pci_intr_string(pc, ih); 188 sc->sc_ih = pci_intr_establish(pc, ih, IPL_BIO, iop_intr, sc); 189 if (sc->sc_ih == NULL) { 190 printf("can't establish interrupt"); 191 if (intrstr != NULL) 192 printf(" at %s", intrstr); 193 printf("\n"); 194 return; 195 } 196 197 /* Attach to the bus-independent code. */ 198 iop_init(sc, intrstr); 199 } 200