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pci_milan.c revision 1.2 
      1 /*	$NetBSD: pci_milan.c,v 1.2 2001/05/28 08:30:03 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 <machine/bswap.h>
     48 
     49 #include <atari/pci/pci_vga.h>
     50 #include <atari/dev/grf_etreg.h>
     51 
     52 int
     53 pci_bus_maxdevs(pc, busno)
     54 	pci_chipset_tag_t pc;
     55 	int busno;
     56 {
     57 	return (6);
     58 }
     59 
     60 /*
     61  * These are defined in locore.s:
     62  */
     63 pcireg_t	milan_pci_confread(pcitag_t);
     64 void		milan_pci_confwrite(u_long, pcireg_t);
     65 u_long		plx_status;
     66 
     67 pcireg_t
     68 pci_conf_read(pc, tag, reg)
     69 	pci_chipset_tag_t pc;
     70 	pcitag_t tag;
     71 	int reg;
     72 {
     73 	u_long		data;
     74 
     75 	data = bswap32(milan_pci_confread(tag | reg));
     76 	if ((plx_status) & 0xf9000000) {
     77 		/*
     78 		 * Access error, assume nothing there...
     79 		 */
     80 		data = 0xffffffff;
     81 	}
     82 	return(data);
     83 }
     84 
     85 
     86 void
     87 pci_conf_write(pc, tag, reg, data)
     88 	pci_chipset_tag_t pc;
     89 	pcitag_t tag;
     90 	int reg;
     91 	pcireg_t data;
     92 {
     93 	milan_pci_confwrite(tag | reg, bswap32(data));
     94 }
     95 
     96 void *
     97 pci_intr_establish(pc, ih, level, ih_fun, ih_arg)
     98 	pci_chipset_tag_t	pc;
     99 	pci_intr_handle_t	ih;
    100 	int			level;
    101 	int			(*ih_fun) __P((void *));
    102 	void			*ih_arg;
    103 {
    104 	printf("pci_intr_establish: Not yet implemented\n");
    105 	return NULL;
    106 }
    107 
    108 void
    109 pci_intr_disestablish(pc, cookie)
    110 	pci_chipset_tag_t pc;
    111 	void *cookie;
    112 {
    113 }
    114 
    115 /*
    116  * VGA related stuff...
    117  * XXX: Currently, you can only boot the Milan through loadbsd.ttp, hence the
    118  *      text mode ;-)
    119  * It looks like the Milan BIOS is initializing the VGA card in a reasonably
    120  * standard text mode. However, the screen mode is 640*480 instead of 640*400.
    121  * Since wscons does not handle the right by default, the card is reprogrammed
    122  * to 640*400 using only 'standard' VGA registers (I hope!). So this ought to
    123  * work on cards other than the S3Trio card I have tested it on.
    124  */
    125 static u_char crt_tab[] = {
    126 	0x60, 0x53, 0x4f, 0x14, 0x56, 0x05, 0xc1, 0x1f,
    127 	0x00, 0x4f, 0x00, 0x0f, 0x00, 0x00, 0x00, 0x00,
    128 	0x98, 0x3d, 0x8f, 0x28, 0x0f, 0x8f, 0xc1, 0xc3,
    129 	0xff };
    130 
    131 /*
    132  * XXX: Why are we repeating this everywhere! (Leo)
    133  */
    134 #define PCI_LINMEMBASE  0x0e000000
    135 
    136 void
    137 milan_vga_init(pc, tag, id, ba, fb)
    138 	pci_chipset_tag_t	pc;
    139 	pcitag_t		tag;
    140 	int			id;
    141 	volatile u_char		*ba;
    142 	u_char			*fb;
    143 {
    144 	int			i, csr;
    145 
    146 	/* Turn on the card */
    147 	pci_conf_write(pc, tag, PCI_MAPREG_START, PCI_LINMEMBASE);
    148 	csr = pci_conf_read(pc, tag, PCI_COMMAND_STATUS_REG);
    149 	csr |= (PCI_COMMAND_MEM_ENABLE|PCI_COMMAND_IO_ENABLE);
    150 	csr |= PCI_COMMAND_MASTER_ENABLE;
    151 	pci_conf_write(pc, tag, PCI_COMMAND_STATUS_REG, csr);
    152 
    153 	/*
    154 	 * Make sure we're allowed to write all crt-registers and reload them.
    155 	 */
    156 	WCrt(ba, CRT_ID_END_VER_RETR, (RCrt(ba, CRT_ID_END_VER_RETR) & 0x7f));
    157 
    158 	for (i = 0; i < 0x18; i++)
    159 		WCrt(ba, i, crt_tab[i]);
    160 
    161 	/*
    162 	 * The Milan has a white border... make it black
    163 	 */
    164 	WAttr(ba, 0x11, 0|0x20);
    165 }
    166