1 /* $NetBSD: bonito_pci.c,v 1.2 2002/08/18 15:57:55 simonb Exp $ */ 2 3 /*- 4 * Copyright (c) 2001 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * PCI configuration space support for the Algorithmics BONITO 41 * MIPS PCI and memory controller. 42 */ 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/device.h> 47 48 #include <machine/bus.h> 49 #include <machine/intr.h> 50 #include <machine/locore.h> 51 52 #include <dev/pci/pcireg.h> 53 #include <dev/pci/pcivar.h> 54 55 #include <mips/bonito/bonitoreg.h> 56 #include <mips/bonito/bonitovar.h> 57 58 /* 59 * Bonito systems are always single-processor, so this is sufficient. 60 */ 61 #define PCI_CONF_LOCK(s) (s) = splhigh() 62 #define PCI_CONF_UNLOCK(s) splx((s)) 63 64 void bonito_attach_hook(struct device *, struct device *, 65 struct pcibus_attach_args *); 66 int bonito_bus_maxdevs(void *, int); 67 pcitag_t bonito_make_tag(void *, int, int, int); 68 void bonito_decompose_tag(void *, pcitag_t, int *, int *, int *); 69 pcireg_t bonito_conf_read(void *, pcitag_t, int); 70 void bonito_conf_write(void *, pcitag_t, int, pcireg_t); 71 72 void 73 bonito_pci_init(pci_chipset_tag_t pc, struct bonito_config *bc) 74 { 75 76 pc->pc_conf_v = bc; 77 pc->pc_attach_hook = bonito_attach_hook; 78 pc->pc_bus_maxdevs = bonito_bus_maxdevs; 79 pc->pc_make_tag = bonito_make_tag; 80 pc->pc_decompose_tag = bonito_decompose_tag; 81 pc->pc_conf_read = bonito_conf_read; 82 pc->pc_conf_write = bonito_conf_write; 83 } 84 85 void 86 bonito_attach_hook(struct device *parent, struct device *self, 87 struct pcibus_attach_args *pba) 88 { 89 } 90 91 int 92 bonito_bus_maxdevs(void *v, int busno) 93 { 94 95 return (32); 96 } 97 98 pcitag_t 99 bonito_make_tag(void *v, int b, int d, int f) 100 { 101 102 return ((b << 16) | (d << 11) | (f << 8)); 103 } 104 105 void 106 bonito_decompose_tag(void *v, pcitag_t tag, int *bp, int *dp, int *fp) 107 { 108 109 if (bp != NULL) 110 *bp = (tag >> 16) & 0xff; 111 if (dp != NULL) 112 *dp = (tag >> 11) & 0x1f; 113 if (fp != NULL) 114 *fp = (tag >> 8) & 0x7; 115 } 116 117 static int 118 bonito_conf_addr(struct bonito_config *bc, pcitag_t tag, int offset, 119 u_int32_t *cfgoff, u_int32_t *pcimap_cfg) 120 { 121 int b, d, f; 122 123 bonito_decompose_tag(bc, tag, &b, &d, &f); 124 125 if (b == 0) { 126 if (d > (31 - bc->bc_adbase)) 127 return (1); 128 *cfgoff = (1UL << (d + bc->bc_adbase)) | (f << 8) | 129 offset; 130 *pcimap_cfg = 0; 131 } else { 132 *cfgoff = tag | offset; 133 *pcimap_cfg = BONITO_PCIMAPCFG_TYPE1; 134 } 135 136 return (0); 137 } 138 139 pcireg_t 140 bonito_conf_read(void *v, pcitag_t tag, int offset) 141 { 142 struct bonito_config *bc = v; 143 pcireg_t data; 144 u_int32_t cfgoff, dummy, pcimap_cfg; 145 int s; 146 147 if (bonito_conf_addr(bc, tag, offset, &cfgoff, &pcimap_cfg)) 148 return ((pcireg_t) -1); 149 150 PCI_CONF_LOCK(s); 151 152 /* clear aborts */ 153 REGVAL(BONITO_PCICMD) |= 154 PCI_STATUS_MASTER_ABORT | PCI_STATUS_MASTER_TARGET_ABORT; 155 156 /* high 16 bits of address go into PciMapCfg register */ 157 REGVAL(BONITO_PCIMAP_CFG) = (cfgoff >> 16) | pcimap_cfg; 158 159 wbflush(); 160 /* Issue a read to make sure the write is posted */ 161 dummy = REGVAL(BONITO_PCIMAP_CFG); 162 163 /* low 16 bits of address are offset into config space */ 164 data = REGVAL(BONITO_PCICFG_BASE + (cfgoff & 0xfffc)); 165 166 /* check for error */ 167 if (REGVAL(BONITO_PCICMD) & 168 (PCI_STATUS_MASTER_ABORT | PCI_STATUS_MASTER_TARGET_ABORT)) 169 data = (pcireg_t) -1; 170 171 PCI_CONF_UNLOCK(s); 172 173 return (data); 174 } 175 176 void 177 bonito_conf_write(void *v, pcitag_t tag, int offset, pcireg_t data) 178 { 179 struct bonito_config *vt = v; 180 u_int32_t cfgoff, dummy, pcimap_cfg; 181 int s; 182 183 if (bonito_conf_addr(vt, tag, offset, &cfgoff, &pcimap_cfg)) 184 panic("bonito_conf_write"); 185 186 PCI_CONF_LOCK(s); 187 188 /* clear aborts */ 189 REGVAL(BONITO_PCICMD) |= 190 PCI_STATUS_MASTER_ABORT | PCI_STATUS_MASTER_TARGET_ABORT; 191 192 /* high 16 bits of address go into PciMapCfg register */ 193 REGVAL(BONITO_PCIMAP_CFG) = (cfgoff >> 16) | pcimap_cfg; 194 195 wbflush(); 196 /* Issue a read to make sure the write is posted */ 197 dummy = REGVAL(BONITO_PCIMAP_CFG); 198 199 /* low 16 bits of address are offset into config space */ 200 REGVAL(BONITO_PCICFG_BASE + (cfgoff & 0xfffc)) = data; 201 202 PCI_CONF_UNLOCK(s); 203 } 204