src/devices/dev_bt431.c

/*
 *  Copyright (C) 2004-2007  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 1.13 2007/06/15 18:44:19 debug Exp $
 *  
 *  COMMENT: Brooktree BT431, 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;
};


DEVICE_ACCESS(bt431)
{
        struct bt431_data *d = 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;

        CHECK_ALLOCATION(d = malloc(sizeof(struct bt431_data)));
        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, DM_DEFAULT, NULL);
}

1	/*
2	* Copyright (C) 2004-2007 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 1.13 2007/06/15 18:44:19 debug Exp $
29	*
30	* COMMENT: Brooktree BT431, 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	DEVICE_ACCESS(bt431)
64	{
65	struct bt431_data *d = extra;
66	uint64_t idata = 0, odata = 0;
67	int btaddr;
68	#if 0
69	int on, new_cursor_x, new_cursor_y;
70	#endif
71
72	if (writeflag == MEM_WRITE)
73	idata = memory_readmax64(cpu, data, len);
74
75	btaddr = ((d->cur_addr_hi << 8) + d->cur_addr_lo) % DEV_BT431_NREGS;
76
77	/* TODO */
78
79	/* Read from/write to the bt431: */
80	switch (relative_addr) {
81	case 0x00: /* Low byte of address: */
82	if (writeflag == MEM_WRITE) {
83	debug("[ bt431: write to Low Address Byte, "
84	"0x%02x ]\n", (int)idata);
85	d->cur_addr_lo = idata;
86	} else {
87	odata = d->cur_addr_lo;
88	debug("[ bt431: read from Low Address Byte: "
89	"0x%0x ]\n", (int)odata);
90	}
91	break;
92	case 0x04: /* High byte of address: */
93	if (writeflag == MEM_WRITE) {
94	debug("[ bt431: write to High Address Byte, "
95	"0x%02x ]\n", (int)idata);
96	d->cur_addr_hi = idata;
97	} else {
98	odata = d->cur_addr_hi;
99	debug("[ bt431: read from High Address Byte: "
100	"0x%0x ]\n", (int)odata);
101	}
102	break;
103	case 0x08: /* Register access: */
104	if (writeflag == MEM_WRITE) {
105	debug("[ bt431: write to BT431 register 0x%04x, "
106	"value 0x%02x ]\n", btaddr, (int)idata);
107	d->bt431_reg[btaddr] = idata;
108
109	#if 0
110	/* Write to cursor bitmap: */
111	if (btaddr >= 0x400)
112	bt431_sync_xysize(d);
113	#endif
114	} else {
115	odata = d->bt431_reg[btaddr];
116	debug("[ bt431: read from BT431 register 0x%04x, "
117	"value 0x%02x ]\n", btaddr, (int)odata);
118	}
119
120	/* Go to next register: */
121	d->cur_addr_lo ++;
122	if (d->cur_addr_lo == 0)
123	d->cur_addr_hi ++;
124	break;
125	default:
126	if (writeflag == MEM_WRITE) {
127	debug("[ bt431: unimplemented write to address "
128	"0x%x, data=0x%02x ]\n", (int)relative_addr,
129	(int)idata);
130	} else {
131	debug("[ bt431: unimplemented read from address "
132	"0x%x ]\n", (int)relative_addr);
133	}
134	}
135
136	#if 0
137
138	TODO: This is from bt459!
139
140	/* NetBSD uses 370,37 as magic values. */
141	new_cursor_x = (d->bt431_reg[BT431_REG_CXLO] & 255) +
142	((d->bt431_reg[BT431_REG_CXHI] & 255) << 8) - 370;
143	new_cursor_y = (d->bt431_reg[BT431_REG_CYLO] & 255) +
144	((d->bt431_reg[BT431_REG_CYHI] & 255) << 8) - 37;
145
146	/* TODO: what do the bits in the CCR do? */
147	on = d->bt431_reg[BT431_REG_CCR] ? 1 : 0;
148
149	on = 1;
150
151	if (new_cursor_x != d->cursor_x \|\| new_cursor_y != d->cursor_y \|\|
152	on != d->cursor_on) {
153	int ysize_mul = 1;
154
155	d->cursor_x = new_cursor_x;
156	d->cursor_y = new_cursor_y;
157	d->cursor_on = on;
158
159	/*
160	* Ugly hack for Ultrix:
161	*
162	* Ultrix and NetBSD assume that the cursor works differently.
163	* Ultrix uses the 370,38 coordinates, but draws the cursor
164	* upwards. NetBSD draws it downwards. Ultrix also makes the
165	* cursor smaller (?).
166	*
167	* TODO: This actually depends on which ultrix kernel you use.
168	* Clearly, the BT459 emulation is not implemented well
169	* enough yet.
170	*
171	* TODO: Find out why? Is it because of special BT459
172	* commands?
173	*
174	* TODO: Is the above text even valid anymore? :-)
175	*/
176	if (!(d->bt431_reg[BT431_REG_CCR] & 1)) {
177	/* ysize_mul = 4; */
178	d->cursor_y += 5 - (d->cursor_ysize * ysize_mul);
179	}
180
181	debug("[ bt431: cursor = %03i,%03i ]\n", d->cursor_x,
182	d->cursor_y);
183	dev_fb_setcursor(d->vfb_data, d->cursor_x, d->cursor_y, on,
184	d->cursor_xsize, d->cursor_ysize * ysize_mul);
185	}
186	#endif
187
188	if (writeflag == MEM_READ)
189	memory_writemax64(cpu, data, len, odata);
190
191	return 1;
192	}
193
194
195	/*
196	* dev_bt431_init():
197	*/
198	void dev_bt431_init(struct memory *mem, uint64_t baseaddr,
199	struct vfb_data *vfb_data, int planes)
200	{
201	struct bt431_data *d;
202
203	CHECK_ALLOCATION(d = malloc(sizeof(struct bt431_data)));
204	memset(d, 0, sizeof(struct bt431_data));
205
206	d->vfb_data = vfb_data;
207	d->planes = planes;
208	d->cursor_x = -1;
209	d->cursor_y = -1;
210	d->cursor_xsize = d->cursor_ysize = 8; /* anything */
211
212	memory_device_register(mem, "bt431", baseaddr, DEV_BT431_LENGTH,
213	dev_bt431_access, (void *)d, DM_DEFAULT, NULL);
214	}
215