1 /* $NetBSD: lca.c,v 1.48 2010/12/15 01:27:19 matt Exp $ */ 2 3 /*- 4 * Copyright (c) 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe. 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 * Copyright (c) 1995, 1996 Carnegie-Mellon University. 34 * All rights reserved. 35 * 36 * Authors: Jeffrey Hsu and Chris G. Demetriou 37 * 38 * Permission to use, copy, modify and distribute this software and 39 * its documentation is hereby granted, provided that both the copyright 40 * notice and this permission notice appear in all copies of the 41 * software, derivative works or modified versions, and any portions 42 * thereof, and that both notices appear in supporting documentation. 43 * 44 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 45 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 46 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 47 * 48 * Carnegie Mellon requests users of this software to return to 49 * 50 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 51 * School of Computer Science 52 * Carnegie Mellon University 53 * Pittsburgh PA 15213-3890 54 * 55 * any improvements or extensions that they make and grant Carnegie the 56 * rights to redistribute these changes. 57 */ 58 59 #include "opt_dec_axppci_33.h" 60 #include "opt_dec_alphabook1.h" 61 #include "opt_dec_eb66.h" 62 63 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 64 65 __KERNEL_RCSID(0, "$NetBSD: lca.c,v 1.48 2010/12/15 01:27:19 matt Exp $"); 66 67 #include <sys/param.h> 68 #include <sys/systm.h> 69 #include <sys/kernel.h> 70 #include <sys/malloc.h> 71 #include <sys/device.h> 72 73 #include <machine/autoconf.h> 74 #include <machine/rpb.h> 75 #include <machine/sysarch.h> 76 77 #include <dev/isa/isareg.h> 78 #include <dev/isa/isavar.h> 79 80 #include <dev/pci/pcireg.h> 81 #include <dev/pci/pcivar.h> 82 #include <alpha/pci/lcareg.h> 83 #include <alpha/pci/lcavar.h> 84 #ifdef DEC_AXPPCI_33 85 #include <alpha/pci/pci_axppci_33.h> 86 #endif 87 #ifdef DEC_ALPHABOOK1 88 #include <alpha/pci/pci_alphabook1.h> 89 #endif 90 #ifdef DEC_EB66 91 #include <alpha/pci/pci_eb66.h> 92 #endif 93 94 int lcamatch(struct device *, struct cfdata *, void *); 95 void lcaattach(struct device *, struct device *, void *); 96 97 CFATTACH_DECL(lca, sizeof(struct lca_softc), 98 lcamatch, lcaattach, NULL, NULL); 99 100 extern struct cfdriver lca_cd; 101 102 int lca_bus_get_window(int, int, 103 struct alpha_bus_space_translation *); 104 105 /* There can be only one. */ 106 int lcafound; 107 struct lca_config lca_configuration; 108 109 int 110 lcamatch(struct device *parent, struct cfdata *match, void *aux) 111 { 112 struct mainbus_attach_args *ma = aux; 113 114 /* Make sure that we're looking for a LCA. */ 115 if (strcmp(ma->ma_name, lca_cd.cd_name) != 0) 116 return (0); 117 118 if (lcafound) 119 return (0); 120 121 return (1); 122 } 123 124 /* 125 * Set up the chipset's function pointers. 126 */ 127 void 128 lca_init(struct lca_config *lcp, int mallocsafe) 129 { 130 131 /* 132 * The LCA HAE register is WRITE-ONLY, so we can't tell where 133 * the second sparse window is actually mapped. Therefore, 134 * we have to guess where it is. This seems to be the normal 135 * address. 136 */ 137 lcp->lc_s_mem_w2_masked_base = 0x80000000; 138 139 if (!lcp->lc_initted) { 140 /* don't do these twice since they set up extents */ 141 lca_bus_io_init(&lcp->lc_iot, lcp); 142 lca_bus_mem_init(&lcp->lc_memt, lcp); 143 144 /* 145 * We have 1 I/O window and 3 MEM windows. 146 */ 147 alpha_bus_window_count[ALPHA_BUS_TYPE_PCI_IO] = 1; 148 alpha_bus_window_count[ALPHA_BUS_TYPE_PCI_MEM] = 3; 149 alpha_bus_get_window = lca_bus_get_window; 150 } 151 lcp->lc_mallocsafe = mallocsafe; 152 153 lca_pci_init(&lcp->lc_pc, lcp); 154 alpha_pci_chipset = &lcp->lc_pc; 155 156 /* 157 * Refer to ``DECchip 21066 and DECchip 21068 Alpha AXP Microprocessors 158 * Hardware Reference Manual''. 159 * ... 160 */ 161 162 /* 163 * According to section 6.4.1, all bits of the IOC_HAE register are 164 * undefined after reset. Bits <31:27> are write-only. However, we 165 * cannot blindly set it to zero. The serial ROM code that initializes 166 * the PCI devices' address spaces, allocates sparse memory blocks in 167 * the range that must use the IOC_HAE register for address translation, 168 * and sets this register accordingly (see section 6.4.14). 169 * 170 * IOC_HAE left AS IS. 171 */ 172 173 /* According to section 6.4.2, all bits of the IOC_CONF register are 174 * undefined after reset. Bits <1:0> are write-only. Set them to 175 * 0x00 for PCI Type 0 configuration access. 176 * 177 * IOC_CONF set to ZERO. 178 */ 179 REGVAL64(LCA_IOC_CONF) = 0; 180 181 lcp->lc_initted = 1; 182 } 183 184 void 185 lcaattach(struct device *parent, struct device *self, void *aux) 186 { 187 struct lca_softc *sc = (struct lca_softc *)self; 188 struct lca_config *lcp; 189 struct pcibus_attach_args pba; 190 191 /* note that we've attached the chipset; can't have 2 LCAs. */ 192 /* Um, not sure about this. XXX JH */ 193 lcafound = 1; 194 195 /* 196 * set up the chipset's info; done once at console init time 197 * (maybe), but we must do it twice to take care of things 198 * that need to use memory allocation. 199 */ 200 lcp = sc->sc_lcp = &lca_configuration; 201 lca_init(lcp, 1); 202 203 /* XXX print chipset information */ 204 printf("\n"); 205 206 lca_dma_init(lcp); 207 208 switch (cputype) { 209 #ifdef DEC_AXPPCI_33 210 case ST_DEC_AXPPCI_33: 211 pci_axppci_33_pickintr(lcp); 212 break; 213 #endif 214 #ifdef DEC_ALPHABOOK1 215 case ST_ALPHABOOK1: 216 pci_alphabook1_pickintr(lcp); 217 break; 218 #endif 219 #ifdef DEC_EB66 220 case ST_EB66: 221 pci_eb66_pickintr(lcp); 222 break; 223 #endif 224 225 default: 226 panic("lcaattach: shouldn't be here, really..."); 227 } 228 229 pba.pba_iot = &lcp->lc_iot; 230 pba.pba_memt = &lcp->lc_memt; 231 pba.pba_dmat = 232 alphabus_dma_get_tag(&lcp->lc_dmat_direct, ALPHA_BUS_PCI); 233 pba.pba_dmat64 = NULL; 234 pba.pba_pc = &lcp->lc_pc; 235 pba.pba_bus = 0; 236 pba.pba_bridgetag = NULL; 237 pba.pba_flags = PCI_FLAGS_IO_ENABLED | PCI_FLAGS_MEM_ENABLED | 238 PCI_FLAGS_MRL_OKAY | PCI_FLAGS_MRM_OKAY | PCI_FLAGS_MWI_OKAY; 239 config_found_ia(self, "pcibus", &pba, pcibusprint); 240 } 241 242 int 243 lca_bus_get_window(int type, int window, struct alpha_bus_space_translation *abst) 244 { 245 struct lca_config *lcp = &lca_configuration; 246 bus_space_tag_t st; 247 248 switch (type) { 249 case ALPHA_BUS_TYPE_PCI_IO: 250 st = &lcp->lc_iot; 251 break; 252 253 case ALPHA_BUS_TYPE_PCI_MEM: 254 st = &lcp->lc_memt; 255 break; 256 257 default: 258 panic("lca_bus_get_window"); 259 } 260 261 return (alpha_bus_space_get_window(st, window, abst)); 262 } 263