175 lines
5.0 KiB
C
175 lines
5.0 KiB
C
/* $NetBSD: pci_milan.c,v 1.5 2003/07/15 01:19:55 lukem Exp $ */
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/*-
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* Copyright (c) 2001 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Leo Weppelman.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: pci_milan.c,v 1.5 2003/07/15 01:19:55 lukem Exp $");
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <dev/pci/pcivar.h>
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#include <dev/pci/pcireg.h>
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#include <dev/isa/isavar.h> /* isa_intr_{dis}establish */
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#include <dev/isa/isareg.h> /* isa_intr_{dis}establish */
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#include <machine/bswap.h>
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#include <machine/isa_machdep.h> /* isa_intr_{dis}establish */
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#include <atari/pci/pci_vga.h>
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#include <atari/dev/grf_etreg.h>
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int
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pci_bus_maxdevs(pc, busno)
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pci_chipset_tag_t pc;
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int busno;
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{
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return (6);
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}
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/*
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* These are defined in locore.s:
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*/
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pcireg_t milan_pci_confread(pcitag_t);
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void milan_pci_confwrite(u_long, pcireg_t);
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u_long plx_status;
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pcireg_t
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pci_conf_read(pc, tag, reg)
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pci_chipset_tag_t pc;
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pcitag_t tag;
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int reg;
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{
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u_long data;
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data = bswap32(milan_pci_confread(tag | reg));
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if ((plx_status) & 0xf9000000) {
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/*
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* Access error, assume nothing there...
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*/
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data = 0xffffffff;
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}
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return(data);
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}
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void
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pci_conf_write(pc, tag, reg, data)
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pci_chipset_tag_t pc;
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pcitag_t tag;
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int reg;
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pcireg_t data;
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{
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milan_pci_confwrite(tag | reg, bswap32(data));
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}
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void *
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pci_intr_establish(pc, ih, level, ih_fun, ih_arg)
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pci_chipset_tag_t pc;
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pci_intr_handle_t ih;
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int level;
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int (*ih_fun) __P((void *));
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void *ih_arg;
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{
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if (ih == 0 || ih >= 16 || ih == 2)
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panic("pci_intr_establish: bogus handle 0x%x", ih);
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return isa_intr_establish(NULL, ih, IST_LEVEL, level, ih_fun, ih_arg);
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}
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void
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pci_intr_disestablish(pc, cookie)
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pci_chipset_tag_t pc;
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void *cookie;
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{
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isa_intr_disestablish(NULL, cookie);
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}
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/*
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* VGA related stuff...
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* XXX: Currently, you can only boot the Milan through loadbsd.ttp, hence the
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* text mode ;-)
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* It looks like the Milan BIOS is initializing the VGA card in a reasonably
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* standard text mode. However, the screen mode is 640*480 instead of 640*400.
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* Since wscons does not handle the right by default, the card is reprogrammed
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* to 640*400 using only 'standard' VGA registers (I hope!). So this ought to
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* work on cards other than the S3Trio card I have tested it on.
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*/
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static u_char crt_tab[] = {
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0x60, 0x53, 0x4f, 0x14, 0x56, 0x05, 0xc1, 0x1f,
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0x00, 0x4f, 0x00, 0x0f, 0x00, 0x00, 0x00, 0x00,
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0x98, 0x3d, 0x8f, 0x28, 0x0f, 0x8f, 0xc1, 0xc3,
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0xff };
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/*
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* XXX: Why are we repeating this everywhere! (Leo)
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*/
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#define PCI_LINMEMBASE 0x0e000000
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void
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milan_vga_init(pc, tag, id, ba, fb)
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pci_chipset_tag_t pc;
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pcitag_t tag;
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int id;
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volatile u_char *ba;
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u_char *fb;
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{
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int i, csr;
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/* Turn on the card */
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pci_conf_write(pc, tag, PCI_MAPREG_START, PCI_LINMEMBASE);
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csr = pci_conf_read(pc, tag, PCI_COMMAND_STATUS_REG);
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csr |= (PCI_COMMAND_MEM_ENABLE|PCI_COMMAND_IO_ENABLE);
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csr |= PCI_COMMAND_MASTER_ENABLE;
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pci_conf_write(pc, tag, PCI_COMMAND_STATUS_REG, csr);
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/*
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* Make sure we're allowed to write all crt-registers and reload them.
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*/
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WCrt(ba, CRT_ID_END_VER_RETR, (RCrt(ba, CRT_ID_END_VER_RETR) & 0x7f));
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for (i = 0; i < 0x18; i++)
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WCrt(ba, i, crt_tab[i]);
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/*
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* The Milan has a white border... make it black
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*/
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WAttr(ba, 0x11, 0|0x20);
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}
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