pci_milan.c revision 1.7
1 /* $NetBSD: pci_milan.c,v 1.7 2006/01/29 21:42:41 dsl 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/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: pci_milan.c,v 1.7 2006/01/29 21:42:41 dsl Exp $"); 41 42 #include <sys/types.h> 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/device.h> 46 47 #include <dev/pci/pcivar.h> 48 #include <dev/pci/pcireg.h> 49 50 #include <dev/isa/isavar.h> /* isa_intr_{dis}establish */ 51 #include <dev/isa/isareg.h> /* isa_intr_{dis}establish */ 52 53 #include <sys/bswap.h> 54 #include <machine/isa_machdep.h> /* isa_intr_{dis}establish */ 55 56 #include <atari/pci/pci_vga.h> 57 #include <atari/dev/grf_etreg.h> 58 59 int 60 pci_bus_maxdevs(pc, busno) 61 pci_chipset_tag_t pc; 62 int busno; 63 { 64 return (6); 65 } 66 67 /* 68 * These are defined in locore.s: 69 */ 70 pcireg_t milan_pci_confread(pcitag_t); 71 void milan_pci_confwrite(u_long, pcireg_t); 72 u_long plx_status; 73 74 pcireg_t 75 pci_conf_read(pc, tag, reg) 76 pci_chipset_tag_t pc; 77 pcitag_t tag; 78 int reg; 79 { 80 u_long data; 81 82 data = bswap32(milan_pci_confread(tag | reg)); 83 if ((plx_status) & 0xf9000000) { 84 /* 85 * Access error, assume nothing there... 86 */ 87 data = 0xffffffff; 88 } 89 return(data); 90 } 91 92 93 void 94 pci_conf_write(pc, tag, reg, data) 95 pci_chipset_tag_t pc; 96 pcitag_t tag; 97 int reg; 98 pcireg_t data; 99 { 100 milan_pci_confwrite(tag | reg, bswap32(data)); 101 } 102 103 void * 104 pci_intr_establish(pc, ih, level, ih_fun, ih_arg) 105 pci_chipset_tag_t pc; 106 pci_intr_handle_t ih; 107 int level; 108 int (*ih_fun) __P((void *)); 109 void *ih_arg; 110 { 111 if (ih == 0 || ih >= 16 || ih == 2) 112 panic("pci_intr_establish: bogus handle 0x%x", ih); 113 return isa_intr_establish(NULL, ih, IST_LEVEL, level, ih_fun, ih_arg); 114 } 115 116 void 117 pci_intr_disestablish(pc, cookie) 118 pci_chipset_tag_t pc; 119 void *cookie; 120 { 121 isa_intr_disestablish(NULL, cookie); 122 } 123 124 /* 125 * VGA related stuff... 126 * XXX: Currently, you can only boot the Milan through loadbsd.ttp, hence the 127 * text mode ;-) 128 * It looks like the Milan BIOS is initializing the VGA card in a reasonably 129 * standard text mode. However, the screen mode is 640*480 instead of 640*400. 130 * Since wscons does not handle the right by default, the card is reprogrammed 131 * to 640*400 using only 'standard' VGA registers (I hope!). So this ought to 132 * work on cards other than the S3Trio card I have tested it on. 133 */ 134 static u_char crt_tab[] = { 135 0x60, 0x53, 0x4f, 0x14, 0x56, 0x05, 0xc1, 0x1f, 136 0x00, 0x4f, 0x00, 0x0f, 0x00, 0x00, 0x00, 0x00, 137 0x98, 0x3d, 0x8f, 0x28, 0x0f, 0x8f, 0xc1, 0xc3, 138 0xff }; 139 140 /* 141 * XXX: Why are we repeating this everywhere! (Leo) 142 */ 143 #define PCI_LINMEMBASE 0x0e000000 144 145 void 146 milan_vga_init(pc, tag, id, ba, fb) 147 pci_chipset_tag_t pc; 148 pcitag_t tag; 149 int id; 150 volatile u_char *ba; 151 u_char *fb; 152 { 153 int i, csr; 154 155 /* Turn on the card */ 156 pci_conf_write(pc, tag, PCI_MAPREG_START, PCI_LINMEMBASE); 157 csr = pci_conf_read(pc, tag, PCI_COMMAND_STATUS_REG); 158 csr |= (PCI_COMMAND_MEM_ENABLE|PCI_COMMAND_IO_ENABLE); 159 csr |= PCI_COMMAND_MASTER_ENABLE; 160 pci_conf_write(pc, tag, PCI_COMMAND_STATUS_REG, csr); 161 162 /* 163 * Make sure we're allowed to write all crt-registers and reload them. 164 */ 165 WCrt(ba, CRT_ID_END_VER_RETR, (RCrt(ba, CRT_ID_END_VER_RETR) & 0x7f)); 166 167 for (i = 0; i < 0x18; i++) 168 WCrt(ba, i, crt_tab[i]); 169 170 /* 171 * The Milan has a white border... make it black 172 */ 173 WAttr(ba, 0x11, 0|0x20); 174 } 175
Indexes created Tue Sep 23 23:09:58 GMT 2025