pci_milan.c revision 1.7.76.1
1 /* $NetBSD: pci_milan.c,v 1.7.76.1 2008/05/16 02:22:05 yamt 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 Leo Weppelman. 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 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: pci_milan.c,v 1.7.76.1 2008/05/16 02:22:05 yamt Exp $"); 34 35 #include <sys/types.h> 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 #include <sys/device.h> 39 40 #include <dev/pci/pcivar.h> 41 #include <dev/pci/pcireg.h> 42 43 #include <dev/isa/isavar.h> /* isa_intr_{dis}establish */ 44 #include <dev/isa/isareg.h> /* isa_intr_{dis}establish */ 45 46 #include <sys/bswap.h> 47 #include <machine/isa_machdep.h> /* isa_intr_{dis}establish */ 48 49 #include <atari/pci/pci_vga.h> 50 #include <atari/dev/grf_etreg.h> 51 52 int 53 pci_bus_maxdevs(pc, busno) 54 pci_chipset_tag_t pc; 55 int busno; 56 { 57 return (6); 58 } 59 60 /* 61 * These are defined in locore.s: 62 */ 63 pcireg_t milan_pci_confread(pcitag_t); 64 void milan_pci_confwrite(u_long, pcireg_t); 65 u_long plx_status; 66 67 pcireg_t 68 pci_conf_read(pc, tag, reg) 69 pci_chipset_tag_t pc; 70 pcitag_t tag; 71 int reg; 72 { 73 u_long data; 74 75 data = bswap32(milan_pci_confread(tag | reg)); 76 if ((plx_status) & 0xf9000000) { 77 /* 78 * Access error, assume nothing there... 79 */ 80 data = 0xffffffff; 81 } 82 return(data); 83 } 84 85 86 void 87 pci_conf_write(pc, tag, reg, data) 88 pci_chipset_tag_t pc; 89 pcitag_t tag; 90 int reg; 91 pcireg_t data; 92 { 93 milan_pci_confwrite(tag | reg, bswap32(data)); 94 } 95 96 void * 97 pci_intr_establish(pc, ih, level, ih_fun, ih_arg) 98 pci_chipset_tag_t pc; 99 pci_intr_handle_t ih; 100 int level; 101 int (*ih_fun) __P((void *)); 102 void *ih_arg; 103 { 104 if (ih == 0 || ih >= 16 || ih == 2) 105 panic("pci_intr_establish: bogus handle 0x%x", ih); 106 return isa_intr_establish(NULL, ih, IST_LEVEL, level, ih_fun, ih_arg); 107 } 108 109 void 110 pci_intr_disestablish(pc, cookie) 111 pci_chipset_tag_t pc; 112 void *cookie; 113 { 114 isa_intr_disestablish(NULL, cookie); 115 } 116 117 /* 118 * VGA related stuff... 119 * XXX: Currently, you can only boot the Milan through loadbsd.ttp, hence the 120 * text mode ;-) 121 * It looks like the Milan BIOS is initializing the VGA card in a reasonably 122 * standard text mode. However, the screen mode is 640*480 instead of 640*400. 123 * Since wscons does not handle the right by default, the card is reprogrammed 124 * to 640*400 using only 'standard' VGA registers (I hope!). So this ought to 125 * work on cards other than the S3Trio card I have tested it on. 126 */ 127 static u_char crt_tab[] = { 128 0x60, 0x53, 0x4f, 0x14, 0x56, 0x05, 0xc1, 0x1f, 129 0x00, 0x4f, 0x00, 0x0f, 0x00, 0x00, 0x00, 0x00, 130 0x98, 0x3d, 0x8f, 0x28, 0x0f, 0x8f, 0xc1, 0xc3, 131 0xff }; 132 133 /* 134 * XXX: Why are we repeating this everywhere! (Leo) 135 */ 136 #define PCI_LINMEMBASE 0x0e000000 137 138 void 139 milan_vga_init(pc, tag, id, ba, fb) 140 pci_chipset_tag_t pc; 141 pcitag_t tag; 142 int id; 143 volatile u_char *ba; 144 u_char *fb; 145 { 146 int i, csr; 147 148 /* Turn on the card */ 149 pci_conf_write(pc, tag, PCI_MAPREG_START, PCI_LINMEMBASE); 150 csr = pci_conf_read(pc, tag, PCI_COMMAND_STATUS_REG); 151 csr |= (PCI_COMMAND_MEM_ENABLE|PCI_COMMAND_IO_ENABLE); 152 csr |= PCI_COMMAND_MASTER_ENABLE; 153 pci_conf_write(pc, tag, PCI_COMMAND_STATUS_REG, csr); 154 155 /* 156 * Make sure we're allowed to write all crt-registers and reload them. 157 */ 158 WCrt(ba, CRT_ID_END_VER_RETR, (RCrt(ba, CRT_ID_END_VER_RETR) & 0x7f)); 159 160 for (i = 0; i < 0x18; i++) 161 WCrt(ba, i, crt_tab[i]); 162 163 /* 164 * The Milan has a white border... make it black 165 */ 166 WAttr(ba, 0x11, 0|0x20); 167 } 168
Indexes created Mon Oct 13 00:09:54 GMT 2025