pci.c revision 1.1.2.2
1 1.1.2.2 yamt /* $NetBSD: pci.c,v 1.1.2.2 2012/05/23 10:07:48 yamt Exp $ */ 2 1.1.2.2 yamt 3 1.1.2.2 yamt /* 4 1.1.2.2 yamt * Copyright (C) 1995-1997 Gary Thomas (gdt (at) linuxppc.org) 5 1.1.2.2 yamt * All rights reserved. 6 1.1.2.2 yamt * 7 1.1.2.2 yamt * Adapted from a program by: 8 1.1.2.2 yamt * Steve Sellgren 9 1.1.2.2 yamt * San Francisco Indigo Company 10 1.1.2.2 yamt * sfindigo!sellgren (at) uunet.uu.net 11 1.1.2.2 yamt * Adapted for Moto boxes by: 12 1.1.2.2 yamt * Pat Kane & Mark Scott, 1996 13 1.1.2.2 yamt * Fixed for IBM/PowerStack II Pat Kane 1997 14 1.1.2.2 yamt * 15 1.1.2.2 yamt * Redistribution and use in source and binary forms, with or without 16 1.1.2.2 yamt * modification, are permitted provided that the following conditions 17 1.1.2.2 yamt * are met: 18 1.1.2.2 yamt * 1. Redistributions of source code must retain the above copyright 19 1.1.2.2 yamt * notice, this list of conditions and the following disclaimer. 20 1.1.2.2 yamt * 2. Redistributions in binary form must reproduce the above copyright 21 1.1.2.2 yamt * notice, this list of conditions and the following disclaimer in the 22 1.1.2.2 yamt * documentation and/or other materials provided with the distribution. 23 1.1.2.2 yamt * 3. All advertising materials mentioning features or use of this software 24 1.1.2.2 yamt * must display the following acknowledgement: 25 1.1.2.2 yamt * This product includes software developed by Gary Thomas. 26 1.1.2.2 yamt * 4. The name of the author may not be used to endorse or promote products 27 1.1.2.2 yamt * derived from this software without specific prior written permission. 28 1.1.2.2 yamt * 29 1.1.2.2 yamt * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 30 1.1.2.2 yamt * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 31 1.1.2.2 yamt * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 32 1.1.2.2 yamt * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 33 1.1.2.2 yamt * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 34 1.1.2.2 yamt * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 35 1.1.2.2 yamt * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 36 1.1.2.2 yamt * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 37 1.1.2.2 yamt * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 38 1.1.2.2 yamt * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 39 1.1.2.2 yamt */ 40 1.1.2.2 yamt 41 1.1.2.2 yamt #include <lib/libsa/stand.h> 42 1.1.2.2 yamt #include <sys/bswap.h> 43 1.1.2.2 yamt #include <dev/pci/pcireg.h> 44 1.1.2.2 yamt 45 1.1.2.2 yamt #include "boot.h" 46 1.1.2.2 yamt 47 1.1.2.2 yamt #define PCI_NSLOTS 8 48 1.1.2.2 yamt #define PCI_NREGS 10 49 1.1.2.2 yamt 50 1.1.2.2 yamt /* 51 1.1.2.2 yamt * should use devfunc number/indirect method to be totally safe on 52 1.1.2.2 yamt * all machines, this works for now on 3 slot Moto boxes 53 1.1.2.2 yamt */ 54 1.1.2.2 yamt 55 1.1.2.2 yamt #define PCI_CONFIG_SPACE_BASE 0x80800000 56 1.1.2.2 yamt #define PCI_CONFIG_SPACE(d, f) \ 57 1.1.2.2 yamt (u_long *)(PCI_CONFIG_SPACE_BASE | (1 << (d)) | ((f) << 8)) 58 1.1.2.2 yamt 59 1.1.2.2 yamt #define DEVID (PCI_ID_REG >> 2) 60 1.1.2.2 yamt #define CMD (PCI_COMMAND_STATUS_REG >> 2) 61 1.1.2.2 yamt #define CLASS (PCI_CLASS_REG >> 2) 62 1.1.2.2 yamt #define BAR_BASE (PCI_MAPREG_START >> 2) 63 1.1.2.2 yamt 64 1.1.2.2 yamt struct PCI_cinfo { 65 1.1.2.2 yamt u_long *config_addr; 66 1.1.2.2 yamt u_long regs[PCI_NREGS]; 67 1.1.2.2 yamt } PCI_slots[PCI_NSLOTS] = { 68 1.1.2.2 yamt { (u_long *)0x80808000, {0xDEADBEEF,} }, 69 1.1.2.2 yamt { (u_long *)0x80800800, {0xDEADBEEF,} }, 70 1.1.2.2 yamt { (u_long *)0x80801000, {0xDEADBEEF,} }, 71 1.1.2.2 yamt { (u_long *)0x80802000, {0xDEADBEEF,} }, 72 1.1.2.2 yamt { (u_long *)0x80804000, {0xDEADBEEF,} }, 73 1.1.2.2 yamt { (u_long *)0x80810000, {0xDEADBEEF,} }, 74 1.1.2.2 yamt { (u_long *)0x80820000, {0xDEADBEEF,} }, 75 1.1.2.2 yamt { (u_long *)0x80840000, {0xDEADBEEF,} }, 76 1.1.2.2 yamt }; 77 1.1.2.2 yamt 78 1.1.2.2 yamt /* 79 1.1.2.2 yamt * The following code modifies the PCI Command register 80 1.1.2.2 yamt * to enable memory and I/O accesses. 81 1.1.2.2 yamt */ 82 1.1.2.2 yamt void 83 1.1.2.2 yamt enablePCI(int slot, int io, int mem, int master) 84 1.1.2.2 yamt { 85 1.1.2.2 yamt volatile u_char *ppci; 86 1.1.2.2 yamt u_char enable = 0; 87 1.1.2.2 yamt 88 1.1.2.2 yamt if (io) 89 1.1.2.2 yamt enable |= PCI_COMMAND_IO_ENABLE; 90 1.1.2.2 yamt if (mem) 91 1.1.2.2 yamt enable |= PCI_COMMAND_MEM_ENABLE; 92 1.1.2.2 yamt if (master) 93 1.1.2.2 yamt enable |= PCI_COMMAND_MASTER_ENABLE; 94 1.1.2.2 yamt 95 1.1.2.2 yamt ppci = (u_char *)&PCI_slots[slot].config_addr[CMD]; 96 1.1.2.2 yamt *ppci = enable; 97 1.1.2.2 yamt __asm volatile("eieio"); 98 1.1.2.2 yamt } 99 1.1.2.2 yamt 100 1.1.2.2 yamt int 101 1.1.2.2 yamt PCISlotnum(u_int bus, u_int dev, u_int func) 102 1.1.2.2 yamt { 103 1.1.2.2 yamt u_long *tag; 104 1.1.2.2 yamt int i; 105 1.1.2.2 yamt 106 1.1.2.2 yamt if (bus != 0 || 107 1.1.2.2 yamt dev < 8 || dev > 18 || 108 1.1.2.2 yamt func > 7) 109 1.1.2.2 yamt return -1; 110 1.1.2.2 yamt 111 1.1.2.2 yamt tag = PCI_CONFIG_SPACE(dev, func); 112 1.1.2.2 yamt for (i = 0; i < sizeof(PCI_slots) / sizeof(struct PCI_cinfo); i++) 113 1.1.2.2 yamt if (tag == PCI_slots[i].config_addr) 114 1.1.2.2 yamt return i; 115 1.1.2.2 yamt return -1; 116 1.1.2.2 yamt } 117 1.1.2.2 yamt 118 1.1.2.2 yamt /* return mapped address for I/O or Memory */ 119 1.1.2.2 yamt u_long 120 1.1.2.2 yamt PCIAddress(int slotnum, u_int bar, int type) 121 1.1.2.2 yamt { 122 1.1.2.2 yamt struct PCI_cinfo *pslot; 123 1.1.2.2 yamt 124 1.1.2.2 yamt if (bar >= 6) 125 1.1.2.2 yamt return 0xffffffff; 126 1.1.2.2 yamt 127 1.1.2.2 yamt pslot = &PCI_slots[slotnum]; 128 1.1.2.2 yamt 129 1.1.2.2 yamt if (pslot->regs[DEVID] == 0xffffffff || 130 1.1.2.2 yamt PCI_MAPREG_TYPE(pslot->regs[BAR_BASE + bar]) != type) 131 1.1.2.2 yamt return 0xffffffff; 132 1.1.2.2 yamt 133 1.1.2.2 yamt return PCI_MAPREG_MEM_ADDR(pslot->regs[BAR_BASE + bar]); 134 1.1.2.2 yamt } 135 1.1.2.2 yamt 136 1.1.2.2 yamt void 137 1.1.2.2 yamt unlockVideo(int slot) 138 1.1.2.2 yamt { 139 1.1.2.2 yamt volatile u_int8_t *ppci; 140 1.1.2.2 yamt 141 1.1.2.2 yamt ppci = (u_int8_t *)PCI_slots[slot].config_addr; 142 1.1.2.2 yamt ppci[4] = 0x0003; /* enable memory and IO Access */ 143 1.1.2.2 yamt #if 0 144 1.1.2.2 yamt ppci[0x10] = 0x00000; /* Turn off memory mapping */ 145 1.1.2.2 yamt ppci[0x11] = 0x00000; /* mem base = 0 */ 146 1.1.2.2 yamt ppci[0x12] = 0x00000; 147 1.1.2.2 yamt ppci[0x13] = 0x00000; 148 1.1.2.2 yamt #endif 149 1.1.2.2 yamt __asm__ volatile("eieio"); 150 1.1.2.2 yamt 151 1.1.2.2 yamt outb(0x3d4, 0x11); 152 1.1.2.2 yamt outb(0x3d5, 0x0e); /* unlock CR0-CR7 */ 153 1.1.2.2 yamt } 154 1.1.2.2 yamt 155 1.1.2.2 yamt int 156 1.1.2.2 yamt scan_PCI(int start) 157 1.1.2.2 yamt { 158 1.1.2.2 yamt int slot, r; 159 1.1.2.2 yamt struct PCI_cinfo *pslot; 160 1.1.2.2 yamt int VGAslot = -1; 161 1.1.2.2 yamt int highVGAslot = 0; 162 1.1.2.2 yamt 163 1.1.2.2 yamt for (slot = start + 1; slot < PCI_NSLOTS; slot++) { 164 1.1.2.2 yamt pslot = &PCI_slots[slot]; 165 1.1.2.2 yamt for (r = 0; r < PCI_NREGS; r++) 166 1.1.2.2 yamt pslot->regs[r] = bswap32(pslot->config_addr[r]); 167 1.1.2.2 yamt if (pslot->regs[DEVID] != 0xffffffff) { 168 1.1.2.2 yamt /* we have a card */ 169 1.1.2.2 yamt if (((pslot->regs[CLASS] & 0xffffff00) == 170 1.1.2.2 yamt 0x03000000) || 171 1.1.2.2 yamt ((pslot->regs[CLASS] & 0xffffff00) == 172 1.1.2.2 yamt 0x00010000)) { 173 1.1.2.2 yamt /* it's a VGA card */ 174 1.1.2.2 yamt highVGAslot = slot; 175 1.1.2.2 yamt if ((pslot->regs[CMD] & 0x03)) { 176 1.1.2.2 yamt /* fW enabled it */ 177 1.1.2.2 yamt VGAslot = slot; 178 1.1.2.2 yamt break; 179 1.1.2.2 yamt } 180 1.1.2.2 yamt } 181 1.1.2.2 yamt } 182 1.1.2.2 yamt } 183 1.1.2.2 yamt return VGAslot; 184 1.1.2.2 yamt } 185 1.1.2.2 yamt 186 1.1.2.2 yamt int 187 1.1.2.2 yamt PCI_vendor(int slotnum) 188 1.1.2.2 yamt { 189 1.1.2.2 yamt struct PCI_cinfo *pslot = &PCI_slots[slotnum]; 190 1.1.2.2 yamt 191 1.1.2.2 yamt return (pslot->regs[DEVID] & 0xffff); 192 1.1.2.2 yamt } 193
Indexes created Thu Oct 02 14:10:14 GMT 2025