1 /* $NetBSD: pci_milan.c,v 1.15 2018/01/28 14:22:23 tsutsui 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 1.15 2018/01/28 14:22:23 tsutsui 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(pci_chipset_tag_t pc, int busno) 54 { 55 return (6); 56 } 57 58 /* 59 * These are defined in locore.s: 60 */ 61 pcireg_t milan_pci_confread(pcitag_t); 62 void milan_pci_confwrite(u_long, pcireg_t); 63 extern u_long plx_status; 64 65 pcireg_t 66 pci_conf_read(pci_chipset_tag_t pc, pcitag_t tag, int reg) 67 { 68 u_long data; 69 70 if ((unsigned int)reg >= PCI_CONF_SIZE) 71 return 0xffffffff; 72 73 data = bswap32(milan_pci_confread(tag | reg)); 74 if ((plx_status) & 0xf9000000) { 75 /* 76 * Access error, assume nothing there... 77 */ 78 data = 0xffffffff; 79 } 80 return(data); 81 } 82 83 84 void 85 pci_conf_write(pci_chipset_tag_t pc, pcitag_t tag, int reg, pcireg_t data) 86 { 87 88 if ((unsigned int)reg >= PCI_CONF_SIZE) 89 return; 90 91 milan_pci_confwrite(tag | reg, bswap32(data)); 92 } 93 94 int 95 pci_intr_setattr(pci_chipset_tag_t pc, pci_intr_handle_t *ih, 96 int attr, uint64_t data) 97 { 98 99 switch (attr) { 100 case PCI_INTR_MPSAFE: 101 return 0; 102 default: 103 return ENODEV; 104 } 105 } 106 107 void * 108 pci_intr_establish(pci_chipset_tag_t pc, pci_intr_handle_t ih, int level, int (*ih_fun)(void *), void *ih_arg) 109 { 110 if (ih == 0 || ih >= 16 || ih == 2) 111 panic("pci_intr_establish: bogus handle 0x%x", ih); 112 return isa_intr_establish(NULL, ih, IST_LEVEL, level, ih_fun, ih_arg); 113 } 114 115 void 116 pci_intr_disestablish(pci_chipset_tag_t pc, void *cookie) 117 { 118 isa_intr_disestablish(NULL, cookie); 119 } 120 121 /* 122 * VGA related stuff... 123 * 124 * It looks like the Milan BIOS is initializing the VGA card in a reasonably 125 * standard text mode. However, the screen mode is 640*480 instead of 640*400. 126 * Since wscons does not handle the right by default, the card is reprogrammed 127 * to 640*400 using only 'standard' VGA registers (I hope!). So this ought to 128 * work on cards other than the S3Trio card I have tested it on. 129 */ 130 static const uint8_t crt_tab[] = { 131 /* taken from vga_crtc[] in sys/dev/ic/vga_subr.c */ 132 0x5f, /* 00: horizontal total */ 133 0x4f, /* 01: horizontal display-enable end */ 134 0x50, /* 02: start horizontal blanking */ 135 0x82, /* 03: display skew control / end horizontal blanking */ 136 0x55, /* 04: start horizontal retrace pulse */ 137 0x81, /* 05: horizontal retrace delay / end horizontal retrace */ 138 0xbf, /* 06: vertical total */ 139 0x1f, /* 07: overflow register */ 140 0x00, /* 08: preset row scan */ 141 0x4f, /* 09: overflow / maximum scan line */ 142 0x0d, /* 0A: cursor off / cursor start */ 143 0x0e, /* 0B: cursor skew / cursor end */ 144 0x00, /* 0C: start regenerative buffer address high */ 145 0x00, /* 0D: start regenerative buffer address low */ 146 0x00, /* 0E: cursor location high */ 147 0x00, /* 0F: cursor location low */ 148 0x9c, /* 10: vertical retrace start */ 149 0x8e, /* 11: vertical interrupt / vertical retrace end */ 150 0x8f, /* 12: vertical display enable end */ 151 0x28, /* 13: logical line width */ 152 0x00, /* 14: underline location */ 153 0x96, /* 15: start vertical blanking */ 154 0xb9, /* 16: end vertical blanking */ 155 0xa3, /* 17: CRT mode control */ 156 0xff /* 18: line compare */ 157 }; 158 159 /* 160 * XXX: Why are we repeating this everywhere! (Leo) 161 */ 162 #define PCI_LINMEMBASE 0x0e000000 163 164 void 165 milan_vga_init(pci_chipset_tag_t pc, pcitag_t tag, int id, volatile u_char *ba, u_char *fb) 166 { 167 int i, csr; 168 169 /* Turn on the card */ 170 pci_conf_write(pc, tag, PCI_MAPREG_START, PCI_LINMEMBASE); 171 csr = pci_conf_read(pc, tag, PCI_COMMAND_STATUS_REG); 172 csr |= (PCI_COMMAND_MEM_ENABLE|PCI_COMMAND_IO_ENABLE); 173 csr |= PCI_COMMAND_MASTER_ENABLE; 174 pci_conf_write(pc, tag, PCI_COMMAND_STATUS_REG, csr); 175 176 /* 177 * Make sure we're allowed to write all crt-registers and reload them. 178 */ 179 WCrt(ba, CRT_ID_END_VER_RETR, (RCrt(ba, CRT_ID_END_VER_RETR) & 0x7f)); 180 181 for (i = 0; i < 0x18; i++) 182 WCrt(ba, i, crt_tab[i]); 183 184 /* 185 * The Milan has a white border... make it black 186 */ 187 WAttr(ba, 0x11, 0|0x20); 188 } 189