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 1.8 2005/02/22 12:15:29 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


        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	/*
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	* $Id: dev_bt431.c,v 1.8 2005/02/22 12:15:29 debug Exp $
29	*
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
78	idata = memory_readmax64(cpu, data, len);
79
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