src/devices/dev_bt431.c

/*
 *  Copyright (C) 2004-2005  Anders Gavare.  All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions are met:
 *
 *  1. Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright  
 *     notice, this list of conditions and the following disclaimer in the 
 *     documentation and/or other materials provided with the distribution.
 *  3. The name of the author may not be used to endorse or promote products
 *     derived from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 *  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 *  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 *  ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE   
 *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 *  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 *  OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 *  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 *  LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 *  OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 *  SUCH DAMAGE.
 *   
 *
 *  $Id: dev_bt431.c,v 1.9 2005/10/26 14:37:03 debug Exp $
 *  
 *  Brooktree 431, used by TURBOchannel graphics cards.
 *
 *  TODO.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "devices.h"
#include "memory.h"
#include "misc.h"

#include "bt431reg.h"


struct bt431_data {
        uint32_t        bt431_reg[DEV_BT431_NREGS];

        unsigned char   cur_addr_hi;
        unsigned char   cur_addr_lo;

        int             planes;
        int             cursor_on;
        int             cursor_x;
        int             cursor_y;
        int             cursor_xsize;
        int             cursor_ysize;

        struct vfb_data *vfb_data;
};


/*
 *  dev_bt431_access():
 */
int dev_bt431_access(struct cpu *cpu, struct memory *mem,
        uint64_t relative_addr, unsigned char *data, size_t len,
        int writeflag, void *extra)
{
        struct bt431_data *d = (struct bt431_data *) extra;
        uint64_t idata = 0, odata = 0;
        int btaddr;
#if 0
        int on, new_cursor_x, new_cursor_y;
#endif

        if (writeflag == MEM_WRITE)
                idata = memory_readmax64(cpu, data, len);

        btaddr = ((d->cur_addr_hi << 8) + d->cur_addr_lo) % DEV_BT431_NREGS;

/*  TODO  */

        /*  Read from/write to the bt431:  */
        switch (relative_addr) {
        case 0x00:              /*  Low byte of address:  */
                if (writeflag == MEM_WRITE) {
                        debug("[ bt431: write to Low Address Byte, "
                            "0x%02x ]\n", (int)idata);
                        d->cur_addr_lo = idata;
                } else {
                        odata = d->cur_addr_lo;
                        debug("[ bt431: read from Low Address Byte: "
                            "0x%0x ]\n", (int)odata);
                }
                break;
        case 0x04:              /*  High byte of address:  */
                if (writeflag == MEM_WRITE) {
                        debug("[ bt431: write to High Address Byte, "
                            "0x%02x ]\n", (int)idata);
                        d->cur_addr_hi = idata;
                } else {
                        odata = d->cur_addr_hi;
                        debug("[ bt431: read from High Address Byte: "
                            "0x%0x ]\n", (int)odata);
                }
                break;
        case 0x08:              /*  Register access:  */
                if (writeflag == MEM_WRITE) {
                        debug("[ bt431: write to BT431 register 0x%04x, "
                            "value 0x%02x ]\n", btaddr, (int)idata);
                        d->bt431_reg[btaddr] = idata;

#if 0
                        /*  Write to cursor bitmap:  */
                        if (btaddr >= 0x400)
                                bt431_sync_xysize(d);
#endif
                } else {
                        odata = d->bt431_reg[btaddr];
                        debug("[ bt431: read from BT431 register 0x%04x, "
                            "value 0x%02x ]\n", btaddr, (int)odata);
                }

                /*  Go to next register:  */
                d->cur_addr_lo ++;
                if (d->cur_addr_lo == 0)
                        d->cur_addr_hi ++;
                break;
        default:
                if (writeflag == MEM_WRITE) {
                        debug("[ bt431: unimplemented write to address "
                            "0x%x, data=0x%02x ]\n", (int)relative_addr,
                            (int)idata);
                } else {
                        debug("[ bt431: unimplemented read from address "
                            "0x%x ]\n", (int)relative_addr);
                }
        }

#if 0

TODO: This is from bt459!

        /*  NetBSD uses 370,37 as magic values.  */
        new_cursor_x = (d->bt431_reg[BT431_REG_CXLO] & 255) +
            ((d->bt431_reg[BT431_REG_CXHI] & 255) << 8) - 370;
        new_cursor_y = (d->bt431_reg[BT431_REG_CYLO] & 255) +
            ((d->bt431_reg[BT431_REG_CYHI] & 255) << 8) - 37;

        /*  TODO: what do the bits in the CCR do?  */
        on = d->bt431_reg[BT431_REG_CCR] ? 1 : 0;

on = 1;

        if (new_cursor_x != d->cursor_x || new_cursor_y != d->cursor_y ||
            on != d->cursor_on) {
                int ysize_mul = 1;

                d->cursor_x = new_cursor_x;
                d->cursor_y = new_cursor_y;
                d->cursor_on = on;

                /*
                 *  Ugly hack for Ultrix:
                 *
                 *  Ultrix and NetBSD assume that the cursor works differently.
                 *  Ultrix uses the 370,38 coordinates, but draws the cursor
                 *  upwards. NetBSD draws it downwards.  Ultrix also makes the
                 *  cursor smaller (?).
                 *
                 *  TODO:  This actually depends on which ultrix kernel you use.
                 *  Clearly, the BT459 emulation is not implemented well
                 *  enough yet.
                 *
                 *  TODO:  Find out why? Is it because of special BT459
                 *  commands?
                 *
                 *  TODO: Is the above text even valid anymore? :-)
                 */
                if (!(d->bt431_reg[BT431_REG_CCR] & 1)) {
/*                      ysize_mul = 4; */
                        d->cursor_y += 5 - (d->cursor_ysize * ysize_mul);
                }

                debug("[ bt431: cursor = %03i,%03i ]\n", d->cursor_x,
                    d->cursor_y);
                dev_fb_setcursor(d->vfb_data, d->cursor_x, d->cursor_y, on,
                    d->cursor_xsize, d->cursor_ysize * ysize_mul);
        }
#endif

        if (writeflag == MEM_READ)
                memory_writemax64(cpu, data, len, odata);

        return 1;
}


/*
 *  dev_bt431_init():
 */
void dev_bt431_init(struct memory *mem, uint64_t baseaddr,
        struct vfb_data *vfb_data, int planes)
{
        struct bt431_data *d = malloc(sizeof(struct bt431_data));
        if (d == NULL) {
                fprintf(stderr, "out of memory\n");
                exit(1);
        }
        memset(d, 0, sizeof(struct bt431_data));
        d->vfb_data     = vfb_data;
        d->planes       = planes;
        d->cursor_x     = -1;
        d->cursor_y     = -1;
        d->cursor_xsize = d->cursor_ysize = 8;  /*  anything  */

        memory_device_register(mem, "bt431", baseaddr, DEV_BT431_LENGTH,
            dev_bt431_access, (void *)d, MEM_DEFAULT, NULL);
}

1	dpavlin	4	/*
2			* Copyright (C) 2004-2005 Anders Gavare. All rights reserved.
3			*
4			* Redistribution and use in source and binary forms, with or without
5			* modification, are permitted provided that the following conditions are met:
6			*
7			* 1. Redistributions of source code must retain the above copyright
8			* notice, this list of conditions and the following disclaimer.
9			* 2. Redistributions in binary form must reproduce the above copyright
10			* notice, this list of conditions and the following disclaimer in the
11			* documentation and/or other materials provided with the distribution.
12			* 3. The name of the author may not be used to endorse or promote products
13			* derived from this software without specific prior written permission.
14			*
15			* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18			* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25			* SUCH DAMAGE.
26			*
27			*
28	dpavlin	18	* $Id: dev_bt431.c,v 1.9 2005/10/26 14:37:03 debug Exp $
29	dpavlin	4	*
30			* Brooktree 431, used by TURBOchannel graphics cards.
31			*
32			* TODO.
33			*/
34
35			#include <stdio.h>
36			#include <stdlib.h>
37			#include <string.h>
38
39			#include "devices.h"
40			#include "memory.h"
41			#include "misc.h"
42
43			#include "bt431reg.h"
44
45
46			struct bt431_data {
47			uint32_t bt431_reg[DEV_BT431_NREGS];
48
49			unsigned char cur_addr_hi;
50			unsigned char cur_addr_lo;
51
52			int planes;
53			int cursor_on;
54			int cursor_x;
55			int cursor_y;
56			int cursor_xsize;
57			int cursor_ysize;
58
59			struct vfb_data *vfb_data;
60			};
61
62
63			/*
64			* dev_bt431_access():
65			*/
66			int dev_bt431_access(struct cpu cpu, struct memory mem,
67			uint64_t relative_addr, unsigned char *data, size_t len,
68			int writeflag, void *extra)
69			{
70			struct bt431_data d = (struct bt431_data ) extra;
71			uint64_t idata = 0, odata = 0;
72			int btaddr;
73			#if 0
74			int on, new_cursor_x, new_cursor_y;
75			#endif
76
77	dpavlin	18	if (writeflag == MEM_WRITE)
78			idata = memory_readmax64(cpu, data, len);
79	dpavlin	4
80			btaddr = ((d->cur_addr_hi << 8) + d->cur_addr_lo) % DEV_BT431_NREGS;
81
82			/* TODO */
83
84			/* Read from/write to the bt431: */
85			switch (relative_addr) {
86			case 0x00: /* Low byte of address: */
87			if (writeflag == MEM_WRITE) {
88			debug("[ bt431: write to Low Address Byte, "
89			"0x%02x ]\n", (int)idata);
90			d->cur_addr_lo = idata;
91			} else {
92			odata = d->cur_addr_lo;
93			debug("[ bt431: read from Low Address Byte: "
94			"0x%0x ]\n", (int)odata);
95			}
96			break;
97			case 0x04: /* High byte of address: */
98			if (writeflag == MEM_WRITE) {
99			debug("[ bt431: write to High Address Byte, "
100			"0x%02x ]\n", (int)idata);
101			d->cur_addr_hi = idata;
102			} else {
103			odata = d->cur_addr_hi;
104			debug("[ bt431: read from High Address Byte: "
105			"0x%0x ]\n", (int)odata);
106			}
107			break;
108			case 0x08: /* Register access: */
109			if (writeflag == MEM_WRITE) {
110			debug("[ bt431: write to BT431 register 0x%04x, "
111			"value 0x%02x ]\n", btaddr, (int)idata);
112			d->bt431_reg[btaddr] = idata;
113
114			#if 0
115			/* Write to cursor bitmap: */
116			if (btaddr >= 0x400)
117			bt431_sync_xysize(d);
118			#endif
119			} else {
120			odata = d->bt431_reg[btaddr];
121			debug("[ bt431: read from BT431 register 0x%04x, "
122			"value 0x%02x ]\n", btaddr, (int)odata);
123			}
124
125			/* Go to next register: */
126			d->cur_addr_lo ++;
127			if (d->cur_addr_lo == 0)
128			d->cur_addr_hi ++;
129			break;
130			default:
131			if (writeflag == MEM_WRITE) {
132			debug("[ bt431: unimplemented write to address "
133			"0x%x, data=0x%02x ]\n", (int)relative_addr,
134			(int)idata);
135			} else {
136			debug("[ bt431: unimplemented read from address "
137			"0x%x ]\n", (int)relative_addr);
138			}
139			}
140
141			#if 0
142
143			TODO: This is from bt459!
144
145			/* NetBSD uses 370,37 as magic values. */
146			new_cursor_x = (d->bt431_reg[BT431_REG_CXLO] & 255) +
147			((d->bt431_reg[BT431_REG_CXHI] & 255) << 8) - 370;
148			new_cursor_y = (d->bt431_reg[BT431_REG_CYLO] & 255) +
149			((d->bt431_reg[BT431_REG_CYHI] & 255) << 8) - 37;
150
151			/* TODO: what do the bits in the CCR do? */
152			on = d->bt431_reg[BT431_REG_CCR] ? 1 : 0;
153
154			on = 1;
155
156			if (new_cursor_x != d->cursor_x \|\| new_cursor_y != d->cursor_y \|\|
157			on != d->cursor_on) {
158			int ysize_mul = 1;
159
160			d->cursor_x = new_cursor_x;
161			d->cursor_y = new_cursor_y;
162			d->cursor_on = on;
163
164			/*
165			* Ugly hack for Ultrix:
166			*
167			* Ultrix and NetBSD assume that the cursor works differently.
168			* Ultrix uses the 370,38 coordinates, but draws the cursor
169			* upwards. NetBSD draws it downwards. Ultrix also makes the
170			* cursor smaller (?).
171			*
172			* TODO: This actually depends on which ultrix kernel you use.
173			* Clearly, the BT459 emulation is not implemented well
174			* enough yet.
175			*
176			* TODO: Find out why? Is it because of special BT459
177			* commands?
178			*
179			* TODO: Is the above text even valid anymore? :-)
180			*/
181			if (!(d->bt431_reg[BT431_REG_CCR] & 1)) {
182			/* ysize_mul = 4; */
183			d->cursor_y += 5 - (d->cursor_ysize * ysize_mul);
184			}
185
186			debug("[ bt431: cursor = %03i,%03i ]\n", d->cursor_x,
187			d->cursor_y);
188			dev_fb_setcursor(d->vfb_data, d->cursor_x, d->cursor_y, on,
189			d->cursor_xsize, d->cursor_ysize * ysize_mul);
190			}
191			#endif
192
193			if (writeflag == MEM_READ)
194			memory_writemax64(cpu, data, len, odata);
195
196			return 1;
197			}
198
199
200			/*
201			* dev_bt431_init():
202			*/
203			void dev_bt431_init(struct memory *mem, uint64_t baseaddr,
204			struct vfb_data *vfb_data, int planes)
205			{
206			struct bt431_data *d = malloc(sizeof(struct bt431_data));
207			if (d == NULL) {
208			fprintf(stderr, "out of memory\n");
209			exit(1);
210			}
211			memset(d, 0, sizeof(struct bt431_data));
212			d->vfb_data = vfb_data;
213			d->planes = planes;
214			d->cursor_x = -1;
215			d->cursor_y = -1;
216			d->cursor_xsize = d->cursor_ysize = 8; /* anything */
217
218			memory_device_register(mem, "bt431", baseaddr, DEV_BT431_LENGTH,
219			dev_bt431_access, (void *)d, MEM_DEFAULT, NULL);
220			}
221