1 /* $NetBSD: pci_milan.c,v 1.14 2015/10/02 05:22:50 msaitoh 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 1.14 2015/10/02 05:22:50 msaitoh 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 * 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(pci_chipset_tag_t pc, pcitag_t tag, int id, volatile u_char *ba, u_char *fb) 144 { 145 int i, csr; 146 147 /* Turn on the card */ 148 pci_conf_write(pc, tag, PCI_MAPREG_START, PCI_LINMEMBASE); 149 csr = pci_conf_read(pc, tag, PCI_COMMAND_STATUS_REG); 150 csr |= (PCI_COMMAND_MEM_ENABLE|PCI_COMMAND_IO_ENABLE); 151 csr |= PCI_COMMAND_MASTER_ENABLE; 152 pci_conf_write(pc, tag, PCI_COMMAND_STATUS_REG, csr); 153 154 /* 155 * Make sure we're allowed to write all crt-registers and reload them. 156 */ 157 WCrt(ba, CRT_ID_END_VER_RETR, (RCrt(ba, CRT_ID_END_VER_RETR) & 0x7f)); 158 159 for (i = 0; i < 0x18; i++) 160 WCrt(ba, i, crt_tab[i]); 161 162 /* 163 * The Milan has a white border... make it black 164 */ 165 WAttr(ba, 0x11, 0|0x20); 166 } 167