pci_milan.c revision 1.3
1 /* $NetBSD: pci_milan.c,v 1.3 2002/01/09 21:19:14 leo 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 * 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 #include <sys/types.h> 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/device.h> 43 44 #include <dev/pci/pcivar.h> 45 #include <dev/pci/pcireg.h> 46 47 #include <dev/isa/isavar.h> /* isa_intr_{dis}establish */ 48 #include <dev/isa/isareg.h> /* isa_intr_{dis}establish */ 49 50 #include <machine/bswap.h> 51 #include <machine/isa_machdep.h> /* isa_intr_{dis}establish */ 52 53 #include <atari/pci/pci_vga.h> 54 #include <atari/dev/grf_etreg.h> 55 56 int 57 pci_bus_maxdevs(pc, busno) 58 pci_chipset_tag_t pc; 59 int busno; 60 { 61 return (6); 62 } 63 64 /* 65 * These are defined in locore.s: 66 */ 67 pcireg_t milan_pci_confread(pcitag_t); 68 void milan_pci_confwrite(u_long, pcireg_t); 69 u_long plx_status; 70 71 pcireg_t 72 pci_conf_read(pc, tag, reg) 73 pci_chipset_tag_t pc; 74 pcitag_t tag; 75 int reg; 76 { 77 u_long data; 78 79 data = bswap32(milan_pci_confread(tag | reg)); 80 if ((plx_status) & 0xf9000000) { 81 /* 82 * Access error, assume nothing there... 83 */ 84 data = 0xffffffff; 85 } 86 return(data); 87 } 88 89 90 void 91 pci_conf_write(pc, tag, reg, data) 92 pci_chipset_tag_t pc; 93 pcitag_t tag; 94 int reg; 95 pcireg_t data; 96 { 97 milan_pci_confwrite(tag | reg, bswap32(data)); 98 } 99 100 void * 101 pci_intr_establish(pc, ih, level, ih_fun, ih_arg) 102 pci_chipset_tag_t pc; 103 pci_intr_handle_t ih; 104 int level; 105 int (*ih_fun) __P((void *)); 106 void *ih_arg; 107 { 108 if (ih == 0 || ih >= 16 || ih == 2) 109 panic("pci_intr_establish: bogus handle 0x%x\n", ih); 110 return isa_intr_establish(NULL, ih, IST_LEVEL, level, ih_fun, ih_arg); 111 } 112 113 void 114 pci_intr_disestablish(pc, cookie) 115 pci_chipset_tag_t pc; 116 void *cookie; 117 { 118 isa_intr_disestablish(NULL, cookie); 119 } 120 121 /* 122 * VGA related stuff... 123 * XXX: Currently, you can only boot the Milan through loadbsd.ttp, hence the 124 * text mode ;-) 125 * It looks like the Milan BIOS is initializing the VGA card in a reasonably 126 * standard text mode. However, the screen mode is 640*480 instead of 640*400. 127 * Since wscons does not handle the right by default, the card is reprogrammed 128 * to 640*400 using only 'standard' VGA registers (I hope!). So this ought to 129 * work on cards other than the S3Trio card I have tested it on. 130 */ 131 static u_char crt_tab[] = { 132 0x60, 0x53, 0x4f, 0x14, 0x56, 0x05, 0xc1, 0x1f, 133 0x00, 0x4f, 0x00, 0x0f, 0x00, 0x00, 0x00, 0x00, 134 0x98, 0x3d, 0x8f, 0x28, 0x0f, 0x8f, 0xc1, 0xc3, 135 0xff }; 136 137 /* 138 * XXX: Why are we repeating this everywhere! (Leo) 139 */ 140 #define PCI_LINMEMBASE 0x0e000000 141 142 void 143 milan_vga_init(pc, tag, id, ba, fb) 144 pci_chipset_tag_t pc; 145 pcitag_t tag; 146 int id; 147 volatile u_char *ba; 148 u_char *fb; 149 { 150 int i, csr; 151 152 /* Turn on the card */ 153 pci_conf_write(pc, tag, PCI_MAPREG_START, PCI_LINMEMBASE); 154 csr = pci_conf_read(pc, tag, PCI_COMMAND_STATUS_REG); 155 csr |= (PCI_COMMAND_MEM_ENABLE|PCI_COMMAND_IO_ENABLE); 156 csr |= PCI_COMMAND_MASTER_ENABLE; 157 pci_conf_write(pc, tag, PCI_COMMAND_STATUS_REG, csr); 158 159 /* 160 * Make sure we're allowed to write all crt-registers and reload them. 161 */ 162 WCrt(ba, CRT_ID_END_VER_RETR, (RCrt(ba, CRT_ID_END_VER_RETR) & 0x7f)); 163 164 for (i = 0; i < 0x18; i++) 165 WCrt(ba, i, crt_tab[i]); 166 167 /* 168 * The Milan has a white border... make it black 169 */ 170 WAttr(ba, 0x11, 0|0x20); 171 } 172
Indexes created Tue Sep 23 23:09:58 GMT 2025