1 /* $NetBSD: bonito_pci.c,v 1.4 2005/12/11 12:18:07 christos 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/cdefs.h> 45 __KERNEL_RCSID(0, "$NetBSD: bonito_pci.c,v 1.4 2005/12/11 12:18:07 christos Exp $"); 46 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 #include <sys/device.h> 50 51 #include <machine/bus.h> 52 #include <machine/intr.h> 53 #include <machine/locore.h> 54 55 #include <dev/pci/pcireg.h> 56 #include <dev/pci/pcivar.h> 57 58 #include <mips/bonito/bonitoreg.h> 59 #include <mips/bonito/bonitovar.h> 60 61 /* 62 * Bonito systems are always single-processor, so this is sufficient. 63 */ 64 #define PCI_CONF_LOCK(s) (s) = splhigh() 65 #define PCI_CONF_UNLOCK(s) splx((s)) 66 67 void bonito_attach_hook(struct device *, struct device *, 68 struct pcibus_attach_args *); 69 int bonito_bus_maxdevs(void *, int); 70 pcitag_t bonito_make_tag(void *, int, int, int); 71 void bonito_decompose_tag(void *, pcitag_t, int *, int *, int *); 72 pcireg_t bonito_conf_read(void *, pcitag_t, int); 73 void bonito_conf_write(void *, pcitag_t, int, pcireg_t); 74 75 void 76 bonito_pci_init(pci_chipset_tag_t pc, struct bonito_config *bc) 77 { 78 79 pc->pc_conf_v = bc; 80 pc->pc_attach_hook = bonito_attach_hook; 81 pc->pc_bus_maxdevs = bonito_bus_maxdevs; 82 pc->pc_make_tag = bonito_make_tag; 83 pc->pc_decompose_tag = bonito_decompose_tag; 84 pc->pc_conf_read = bonito_conf_read; 85 pc->pc_conf_write = bonito_conf_write; 86 } 87 88 void 89 bonito_attach_hook(struct device *parent, struct device *self, 90 struct pcibus_attach_args *pba) 91 { 92 } 93 94 int 95 bonito_bus_maxdevs(void *v, int busno) 96 { 97 98 return (32); 99 } 100 101 pcitag_t 102 bonito_make_tag(void *v, int b, int d, int f) 103 { 104 105 return ((b << 16) | (d << 11) | (f << 8)); 106 } 107 108 void 109 bonito_decompose_tag(void *v, pcitag_t tag, int *bp, int *dp, int *fp) 110 { 111 112 if (bp != NULL) 113 *bp = (tag >> 16) & 0xff; 114 if (dp != NULL) 115 *dp = (tag >> 11) & 0x1f; 116 if (fp != NULL) 117 *fp = (tag >> 8) & 0x7; 118 } 119 120 static int 121 bonito_conf_addr(struct bonito_config *bc, pcitag_t tag, int offset, 122 u_int32_t *cfgoff, u_int32_t *pcimap_cfg) 123 { 124 int b, d, f; 125 126 bonito_decompose_tag(bc, tag, &b, &d, &f); 127 128 if (b == 0) { 129 if (d > (31 - bc->bc_adbase)) 130 return (1); 131 *cfgoff = (1UL << (d + bc->bc_adbase)) | (f << 8) | 132 offset; 133 *pcimap_cfg = 0; 134 } else { 135 *cfgoff = tag | offset; 136 *pcimap_cfg = BONITO_PCIMAPCFG_TYPE1; 137 } 138 139 return (0); 140 } 141 142 pcireg_t 143 bonito_conf_read(void *v, pcitag_t tag, int offset) 144 { 145 struct bonito_config *bc = v; 146 pcireg_t data; 147 u_int32_t cfgoff, dummy, pcimap_cfg; 148 int s; 149 150 if (bonito_conf_addr(bc, tag, offset, &cfgoff, &pcimap_cfg)) 151 return ((pcireg_t) -1); 152 153 PCI_CONF_LOCK(s); 154 155 /* clear aborts */ 156 REGVAL(BONITO_PCICMD) |= 157 PCI_STATUS_MASTER_ABORT | PCI_STATUS_MASTER_TARGET_ABORT; 158 159 /* high 16 bits of address go into PciMapCfg register */ 160 REGVAL(BONITO_PCIMAP_CFG) = (cfgoff >> 16) | pcimap_cfg; 161 162 wbflush(); 163 /* Issue a read to make sure the write is posted */ 164 dummy = REGVAL(BONITO_PCIMAP_CFG); 165 166 /* low 16 bits of address are offset into config space */ 167 data = REGVAL(BONITO_PCICFG_BASE + (cfgoff & 0xfffc)); 168 169 /* check for error */ 170 if (REGVAL(BONITO_PCICMD) & 171 (PCI_STATUS_MASTER_ABORT | PCI_STATUS_MASTER_TARGET_ABORT)) 172 data = (pcireg_t) -1; 173 174 PCI_CONF_UNLOCK(s); 175 176 return (data); 177 } 178 179 void 180 bonito_conf_write(void *v, pcitag_t tag, int offset, pcireg_t data) 181 { 182 struct bonito_config *vt = v; 183 u_int32_t cfgoff, dummy, pcimap_cfg; 184 int s; 185 186 if (bonito_conf_addr(vt, tag, offset, &cfgoff, &pcimap_cfg)) 187 panic("bonito_conf_write"); 188 189 PCI_CONF_LOCK(s); 190 191 /* clear aborts */ 192 REGVAL(BONITO_PCICMD) |= 193 PCI_STATUS_MASTER_ABORT | PCI_STATUS_MASTER_TARGET_ABORT; 194 195 /* high 16 bits of address go into PciMapCfg register */ 196 REGVAL(BONITO_PCIMAP_CFG) = (cfgoff >> 16) | pcimap_cfg; 197 198 wbflush(); 199 /* Issue a read to make sure the write is posted */ 200 dummy = REGVAL(BONITO_PCIMAP_CFG); 201 202 /* low 16 bits of address are offset into config space */ 203 REGVAL(BONITO_PCICFG_BASE + (cfgoff & 0xfffc)) = data; 204 205 PCI_CONF_UNLOCK(s); 206 } 207