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/* |
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* Copyright (C) 2004-2006 Anders Gavare. All rights reserved. |
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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 are met: |
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* |
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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. The name of the author may not be used to endorse or promote products |
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* derived from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* |
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* $Id: dev_bt431.c,v 1.11 2006/01/01 13:17:16 debug Exp $ |
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* |
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* Brooktree 431, used by TURBOchannel graphics cards. |
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* |
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* TODO. |
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*/ |
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|
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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|
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#include "devices.h" |
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#include "memory.h" |
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#include "misc.h" |
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|
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#include "bt431reg.h" |
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|
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|
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struct bt431_data { |
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uint32_t bt431_reg[DEV_BT431_NREGS]; |
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|
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unsigned char cur_addr_hi; |
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unsigned char cur_addr_lo; |
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|
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int planes; |
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int cursor_on; |
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int cursor_x; |
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int cursor_y; |
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int cursor_xsize; |
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int cursor_ysize; |
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|
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struct vfb_data *vfb_data; |
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}; |
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|
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|
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/* |
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* dev_bt431_access(): |
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*/ |
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DEVICE_ACCESS(bt431) |
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{ |
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struct bt431_data *d = (struct bt431_data *) extra; |
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uint64_t idata = 0, odata = 0; |
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int btaddr; |
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#if 0 |
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int on, new_cursor_x, new_cursor_y; |
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#endif |
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|
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if (writeflag == MEM_WRITE) |
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idata = memory_readmax64(cpu, data, len); |
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|
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btaddr = ((d->cur_addr_hi << 8) + d->cur_addr_lo) % DEV_BT431_NREGS; |
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|
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/* TODO */ |
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|
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/* Read from/write to the bt431: */ |
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switch (relative_addr) { |
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case 0x00: /* Low byte of address: */ |
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if (writeflag == MEM_WRITE) { |
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debug("[ bt431: write to Low Address Byte, " |
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"0x%02x ]\n", (int)idata); |
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d->cur_addr_lo = idata; |
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} else { |
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odata = d->cur_addr_lo; |
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debug("[ bt431: read from Low Address Byte: " |
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"0x%0x ]\n", (int)odata); |
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} |
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break; |
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case 0x04: /* High byte of address: */ |
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if (writeflag == MEM_WRITE) { |
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debug("[ bt431: write to High Address Byte, " |
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"0x%02x ]\n", (int)idata); |
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d->cur_addr_hi = idata; |
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} else { |
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odata = d->cur_addr_hi; |
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debug("[ bt431: read from High Address Byte: " |
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"0x%0x ]\n", (int)odata); |
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} |
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break; |
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case 0x08: /* Register access: */ |
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if (writeflag == MEM_WRITE) { |
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debug("[ bt431: write to BT431 register 0x%04x, " |
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"value 0x%02x ]\n", btaddr, (int)idata); |
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d->bt431_reg[btaddr] = idata; |
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|
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#if 0 |
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/* Write to cursor bitmap: */ |
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if (btaddr >= 0x400) |
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bt431_sync_xysize(d); |
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#endif |
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} else { |
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odata = d->bt431_reg[btaddr]; |
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debug("[ bt431: read from BT431 register 0x%04x, " |
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"value 0x%02x ]\n", btaddr, (int)odata); |
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} |
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|
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/* Go to next register: */ |
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d->cur_addr_lo ++; |
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if (d->cur_addr_lo == 0) |
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d->cur_addr_hi ++; |
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break; |
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default: |
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if (writeflag == MEM_WRITE) { |
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debug("[ bt431: unimplemented write to address " |
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"0x%x, data=0x%02x ]\n", (int)relative_addr, |
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(int)idata); |
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} else { |
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debug("[ bt431: unimplemented read from address " |
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"0x%x ]\n", (int)relative_addr); |
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} |
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} |
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|
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#if 0 |
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|
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TODO: This is from bt459! |
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|
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/* NetBSD uses 370,37 as magic values. */ |
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new_cursor_x = (d->bt431_reg[BT431_REG_CXLO] & 255) + |
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((d->bt431_reg[BT431_REG_CXHI] & 255) << 8) - 370; |
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new_cursor_y = (d->bt431_reg[BT431_REG_CYLO] & 255) + |
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((d->bt431_reg[BT431_REG_CYHI] & 255) << 8) - 37; |
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|
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/* TODO: what do the bits in the CCR do? */ |
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on = d->bt431_reg[BT431_REG_CCR] ? 1 : 0; |
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|
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on = 1; |
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|
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if (new_cursor_x != d->cursor_x || new_cursor_y != d->cursor_y || |
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on != d->cursor_on) { |
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int ysize_mul = 1; |
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|
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d->cursor_x = new_cursor_x; |
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d->cursor_y = new_cursor_y; |
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d->cursor_on = on; |
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|
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/* |
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* Ugly hack for Ultrix: |
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* |
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* Ultrix and NetBSD assume that the cursor works differently. |
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* Ultrix uses the 370,38 coordinates, but draws the cursor |
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* upwards. NetBSD draws it downwards. Ultrix also makes the |
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* cursor smaller (?). |
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* |
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* TODO: This actually depends on which ultrix kernel you use. |
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* Clearly, the BT459 emulation is not implemented well |
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* enough yet. |
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* |
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* TODO: Find out why? Is it because of special BT459 |
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* commands? |
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* |
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* TODO: Is the above text even valid anymore? :-) |
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*/ |
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if (!(d->bt431_reg[BT431_REG_CCR] & 1)) { |
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/* ysize_mul = 4; */ |
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d->cursor_y += 5 - (d->cursor_ysize * ysize_mul); |
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} |
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|
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debug("[ bt431: cursor = %03i,%03i ]\n", d->cursor_x, |
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d->cursor_y); |
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dev_fb_setcursor(d->vfb_data, d->cursor_x, d->cursor_y, on, |
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d->cursor_xsize, d->cursor_ysize * ysize_mul); |
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} |
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#endif |
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|
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if (writeflag == MEM_READ) |
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memory_writemax64(cpu, data, len, odata); |
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|
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return 1; |
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} |
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|
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|
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/* |
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* dev_bt431_init(): |
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*/ |
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void dev_bt431_init(struct memory *mem, uint64_t baseaddr, |
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struct vfb_data *vfb_data, int planes) |
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{ |
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struct bt431_data *d = malloc(sizeof(struct bt431_data)); |
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if (d == NULL) { |
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fprintf(stderr, "out of memory\n"); |
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exit(1); |
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} |
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memset(d, 0, sizeof(struct bt431_data)); |
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d->vfb_data = vfb_data; |
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d->planes = planes; |
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d->cursor_x = -1; |
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d->cursor_y = -1; |
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d->cursor_xsize = d->cursor_ysize = 8; /* anything */ |
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|
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memory_device_register(mem, "bt431", baseaddr, DEV_BT431_LENGTH, |
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dev_bt431_access, (void *)d, DM_DEFAULT, NULL); |
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} |
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