| 1 | /* $NetBSD: iop_pci.c,v 1.29 2016/07/14 04:12:08 msaitoh 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 1.29 2016/07/14 04:12:08 msaitoh 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_NEW(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 | char intrbuf[PCI_INTRSTR_LEN]; |
| 118 | |
| 119 | sc = device_private(self); |
| 120 | sc->sc_dev = self; |
| 121 | pa = aux; |
| 122 | pc = pa->pa_pc; |
| 123 | printf(": " ); |
| 124 | |
| 125 | /* |
| 126 | * The kernel always uses the first memory mapping to communicate |
| 127 | * with the IOP. |
| 128 | */ |
| 129 | for (i = PCI_MAPREG_START; i < PCI_MAPREG_END; i += 4) { |
| 130 | reg = pci_conf_read(pc, pa->pa_tag, i); |
| 131 | if (PCI_MAPREG_TYPE(reg) == PCI_MAPREG_TYPE_MEM) { |
| 132 | sc->sc_memaddr = PCI_MAPREG_MEM_ADDR(reg); |
| 133 | break; |
| 134 | } |
| 135 | } |
| 136 | if (i == PCI_MAPREG_END) { |
| 137 | aprint_error("can't find mapping\n" ); |
| 138 | return; |
| 139 | } |
| 140 | |
| 141 | /* Map the register window. */ |
| 142 | if (pci_mapreg_map(pa, i, PCI_MAPREG_TYPE_MEM, 0, &sc->sc_iot, |
| 143 | &sc->sc_ioh, NULL, NULL)) { |
| 144 | aprint_error_dev(self, "can't map register window\n" ); |
| 145 | return; |
| 146 | } |
| 147 | |
| 148 | /* Map the 2nd register window. */ |
| 149 | if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_DPT && |
| 150 | PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_DPT_RAID_2005S) { |
| 151 | i += 4; /* next BAR */ |
| 152 | if (i == PCI_MAPREG_END) { |
| 153 | aprint_error("can't find mapping\n" ); |
| 154 | return; |
| 155 | } |
| 156 | |
| 157 | #if 0 |
| 158 | /* Should we check it? (see FreeBSD's asr driver) */ |
| 159 | reg = pci_conf_read(pc, pa->pa_tag, PCI_SUBSYS_ID_REG); |
| 160 | printf("subid %x, %x\n" , PCI_VENDOR(reg), PCI_PRODUCT(reg)); |
| 161 | #endif |
| 162 | if (pci_mapreg_map(pa, i, PCI_MAPREG_TYPE_MEM, 0, |
| 163 | &sc->sc_msg_iot, &sc->sc_msg_ioh, NULL, NULL)) { |
| 164 | aprint_error_dev(self, |
| 165 | "can't map 2nd register window\n" ); |
| 166 | return; |
| 167 | } |
| 168 | } else { |
| 169 | /* iop devices other than 2005S */ |
| 170 | sc->sc_msg_iot = sc->sc_iot; |
| 171 | sc->sc_msg_ioh = sc->sc_ioh; |
| 172 | } |
| 173 | |
| 174 | sc->sc_pcibus = pa->pa_bus; |
| 175 | sc->sc_pcidev = pa->pa_device; |
| 176 | sc->sc_dmat = pa->pa_dmat; |
| 177 | sc->sc_bus_memt = pa->pa_memt; |
| 178 | sc->sc_bus_iot = pa->pa_iot; |
| 179 | |
| 180 | /* Enable the device. */ |
| 181 | reg = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG); |
| 182 | pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG, |
| 183 | reg | PCI_COMMAND_MASTER_ENABLE); |
| 184 | |
| 185 | /* Map and establish the interrupt.. */ |
| 186 | if (pci_intr_map(pa, &ih)) { |
| 187 | aprint_error("can't map interrupt\n" ); |
| 188 | return; |
| 189 | } |
| 190 | intrstr = pci_intr_string(pc, ih, intrbuf, sizeof(intrbuf)); |
| 191 | sc->sc_ih = pci_intr_establish(pc, ih, IPL_BIO, iop_intr, sc); |
| 192 | if (sc->sc_ih == NULL) { |
| 193 | aprint_error("can't establish interrupt" ); |
| 194 | if (intrstr != NULL) |
| 195 | aprint_error(" at %s" , intrstr); |
| 196 | aprint_error("\n" ); |
| 197 | return; |
| 198 | } |
| 199 | |
| 200 | /* Attach to the bus-independent code. */ |
| 201 | iop_init(sc, intrstr); |
| 202 | } |
| 203 | |