1 /* $NetBSD: gt.c,v 1.7 2003/07/15 01:37:34 lukem Exp $ */ 2 3 /* 4 * Copyright 2002 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Jason R. Thorpe and Simon Burge for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 #include <sys/cdefs.h> 39 __KERNEL_RCSID(0, "$NetBSD: gt.c,v 1.7 2003/07/15 01:37:34 lukem Exp $"); 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/device.h> 44 45 #include <dev/pci/pcivar.h> 46 47 #include <evbmips/malta/maltareg.h> 48 #include <evbmips/malta/maltavar.h> 49 50 #include <evbmips/malta/dev/gtreg.h> 51 #include <evbmips/malta/dev/gtvar.h> 52 53 #include "pci.h" 54 55 /* 56 * Galileo systems (so far) are always single-processor, so this is sufficient. 57 */ 58 #define PCI_CONF_LOCK(s) (s) = splhigh() 59 #define PCI_CONF_UNLOCK(s) splx((s)) 60 61 static void gt_attach_hook(struct device *, struct device *, 62 struct pcibus_attach_args *); 63 static int gt_bus_maxdevs(void *, int); 64 static pcitag_t gt_make_tag(void *, int, int, int); 65 static void gt_decompose_tag(void *, pcitag_t, int *, int *, int *); 66 static pcireg_t gt_conf_read(void *, pcitag_t, int); 67 static void gt_conf_write(void *, pcitag_t, int, pcireg_t); 68 69 void 70 gt_pci_init(pci_chipset_tag_t pc, struct gt_config *mcp) 71 { 72 73 pc->pc_conf_v = mcp; 74 pc->pc_attach_hook = gt_attach_hook; 75 pc->pc_bus_maxdevs = gt_bus_maxdevs; 76 pc->pc_make_tag = gt_make_tag; 77 pc->pc_decompose_tag = gt_decompose_tag; 78 pc->pc_conf_read = gt_conf_read; 79 pc->pc_conf_write = gt_conf_write; 80 } 81 82 static void 83 gt_attach_hook(struct device *parent, struct device *self, 84 struct pcibus_attach_args *pba) 85 { 86 87 /* Nothing to do... */ 88 } 89 90 static int gt_match(struct device *, struct cfdata *, void *); 91 static void gt_attach(struct device *, struct device *, void *); 92 static int gt_print(void *aux, const char *pnp); 93 94 CFATTACH_DECL(gt, sizeof(struct device), 95 gt_match, gt_attach, NULL, NULL); 96 97 static int 98 gt_match(parent, match, aux) 99 struct device *parent; 100 struct cfdata *match; 101 void *aux; 102 { 103 return 1; 104 } 105 106 static void 107 gt_attach(parent, self, aux) 108 struct device *parent; 109 struct device *self; 110 void *aux; 111 { 112 struct malta_config *mcp = &malta_configuration; 113 struct pcibus_attach_args pba; 114 115 printf("\n"); 116 117 #if NPCI > 0 118 pba.pba_busname = "pci"; 119 pba.pba_flags = PCI_FLAGS_IO_ENABLED | PCI_FLAGS_MEM_ENABLED; 120 pba.pba_bus = 0; 121 pba.pba_bridgetag = NULL; 122 pba.pba_iot = &mcp->mc_iot; 123 pba.pba_memt = &mcp->mc_memt; 124 pba.pba_dmat = &mcp->mc_pci_dmat; /* pci_bus_dma_tag */ 125 pba.pba_dmat64 = NULL; 126 pba.pba_pc = &mcp->mc_pc; 127 128 config_found(self, &pba, gt_print); 129 #endif 130 return; 131 } 132 133 static int 134 gt_print(aux, pnp) 135 void *aux; 136 const char *pnp; 137 { 138 /* XXX */ 139 return 0; 140 } 141 142 static int 143 gt_bus_maxdevs(void *v, int busno) 144 { 145 146 /* The galileo has problems accessing device 31. */ 147 if (busno == 0) 148 return (31); 149 return (32); 150 } 151 152 static pcitag_t 153 gt_make_tag(void *v, int b, int d, int f) 154 { 155 156 return ((b << 16) | (d << 11) | (f << 8)); 157 } 158 159 static void 160 gt_decompose_tag(void *v, pcitag_t tag, int *bp, int *dp, int *fp) 161 { 162 163 if (bp != NULL) 164 *bp = (tag >> 16) & 0xff; 165 if (dp != NULL) 166 *dp = (tag >> 11) & 0x1f; 167 if (fp != NULL) 168 *fp = (tag >> 8) & 0x7; 169 } 170 171 static pcireg_t 172 gt_conf_read(void *v, pcitag_t tag, int offset) 173 { 174 pcireg_t data; 175 int bus, dev, func, s; 176 177 gt_decompose_tag(NULL /* XXX */, tag, &bus, &dev, &func); 178 179 /* The galileo has problems accessing device 31. */ 180 if (bus == 0 && dev == 31) 181 return ((pcireg_t) -1); 182 183 /* XXX: no support for bus > 0 yet */ 184 if (bus > 0) 185 return ((pcireg_t) -1); 186 187 PCI_CONF_LOCK(s); 188 189 /* Clear cause register bits. */ 190 GT_REGVAL(GT_INTR_CAUSE) = 0; 191 192 GT_REGVAL(GT_PCI0_CFG_ADDR) = (1 << 31) | tag | offset; 193 data = GT_REGVAL(GT_PCI0_CFG_DATA); 194 195 /* Check for master abort. */ 196 if (GT_REGVAL(GT_INTR_CAUSE) & (GTIC_MASABORT0 | GTIC_TARABORT0)) 197 data = (pcireg_t) -1; 198 199 PCI_CONF_UNLOCK(s); 200 201 return (data); 202 } 203 204 static void 205 gt_conf_write(void *v, pcitag_t tag, int offset, pcireg_t data) 206 { 207 int bus, dev, func, s; 208 209 gt_decompose_tag(NULL /* XXX */, tag, &bus, &dev, &func); 210 211 /* The galileo has problems accessing device 31. */ 212 if (bus == 0 && dev == 31) 213 return; 214 215 /* XXX: no support for bus > 0 yet */ 216 if (bus > 0) 217 return; 218 219 PCI_CONF_LOCK(s); 220 221 /* Clear cause register bits. */ 222 GT_REGVAL(GT_INTR_CAUSE) = 0; 223 224 GT_REGVAL(GT_PCI0_CFG_ADDR) = (1 << 31) | tag | offset; 225 GT_REGVAL(GT_PCI0_CFG_DATA) = data; 226 227 PCI_CONF_UNLOCK(s); 228 } 229