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/* |
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* Copyright (C) 2004 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: pci_dec21030.c,v 1.15 2005/02/26 18:00:38 debug Exp $ |
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* |
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* DEC 21030 "tga" graphics. |
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* |
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* Resolutions that seem to be possible: 640x480, 1024x768, 1280x1024. |
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* 8 bits, perhaps others? (24 bit?) |
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* |
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* NetBSD should say something like this: |
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* |
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* tga0 at pci0 dev 12 function 0: TGA2 pass 2, board type T8-02 |
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* tga0: 1280 x 1024, 8bpp, Bt485 RAMDAC |
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* |
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* See netbsd/src/sys/dev/pci/tga.c for more info. |
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* tga_rop_vtov() for video-to-video copy (scrolling and fast |
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* erasing) |
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* |
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* TODO: This device is far from complete. |
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* The RAMDAC is non-existant. |
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* |
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* TODO: all fb device writes with direct writes to the framebuffer |
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* memory, and update the x1,y1,x2,y2 coordinates instead. |
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* That will give better performance. |
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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 "memory.h" |
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#include "misc.h" |
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#include "devices.h" |
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#include "bus_pci.h" |
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#include "tgareg.h" |
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|
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#define MAX_XSIZE 2048 |
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|
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#if 1 |
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int dec21030_default_xsize = 640; |
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int dec21030_default_ysize = 480; |
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#else |
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int dec21030_default_xsize = 1024; |
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int dec21030_default_ysize = 768; |
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#endif |
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|
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|
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/* TODO: Ugly hack: this causes the framebuffer to be in memory */ |
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#define FRAMEBUFFER_PADDR 0x4000000000ULL |
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#define FRAMEBUFFER_BASE 0x201000 |
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|
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#define PCI_VENDOR_DEC 0x1011 /* Digital Equipment */ |
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#define PCI_PRODUCT_DEC_21030 0x0004 /* DECchip 21030 ("TGA") */ |
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|
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struct dec21030_data { |
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int graphics_mode; |
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uint32_t pixel_mask; |
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uint32_t copy_source; |
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uint32_t color; |
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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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* pci_dec21030_rr(): |
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* |
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* See http://mail-index.netbsd.org/port-arc/2001/08/13/0000.html |
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* for more info. |
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*/ |
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uint32_t pci_dec21030_rr(int reg) |
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{ |
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switch (reg) { |
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case 0x00: |
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return PCI_VENDOR_DEC + (PCI_PRODUCT_DEC_21030 << 16); |
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case 0x04: |
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return 0x02800087; |
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case 0x08: |
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return 0x03800003; |
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/* return |
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PCI_CLASS_CODE(PCI_CLASS_DISPLAY, PCI_SUBCLASS_DISPLAY_VGA, 0) |
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+ 0x03; */ |
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case 0x0c: |
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return 0x0000ff00; |
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case 0x10: |
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/* address (8=prefetchable) */ |
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return 0x00000000 + 8; |
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case 0x30: |
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return 0x08000001; |
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case 0x3c: |
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return 0x00000100; /* interrupt pin ? */ |
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default: |
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return 0; |
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} |
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} |
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|
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|
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/* |
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* dev_dec21030_access(): |
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*/ |
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int dev_dec21030_access(struct cpu *cpu, struct memory *mem, |
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uint64_t relative_addr, unsigned char *data, size_t len, |
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int writeflag, void *extra) |
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{ |
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struct dec21030_data *d = extra; |
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uint64_t idata, odata = 0; |
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int reg, r, i, white = 255, black = 0; |
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int newlen; |
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unsigned char buf2[MAX_XSIZE]; |
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|
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/* Read/write to the framebuffer: */ |
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if (relative_addr >= FRAMEBUFFER_BASE) { |
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/* TODO: Perhaps this isn't graphics mode (GMOR), |
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but GOPR (operation) specific: */ |
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|
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switch (d->graphics_mode) { |
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case 1: /* Bitmap write: */ |
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/* Copy from data into buf2: */ |
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for (i=0; i<len; i++) { |
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buf2[i*8 + 0] = data[i]&1? white : black; |
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buf2[i*8 + 1] = data[i]&2? white : black; |
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buf2[i*8 + 2] = data[i]&4? white : black; |
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buf2[i*8 + 3] = data[i]&8? white : black; |
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buf2[i*8 + 4] = data[i]&16? white : black; |
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buf2[i*8 + 5] = data[i]&32? white : black; |
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buf2[i*8 + 6] = data[i]&64? white : black; |
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buf2[i*8 + 7] = data[i]&128? white : black; |
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} |
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|
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newlen = 0; |
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for (i=0; i<32; i++) |
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if (d->pixel_mask & (1 << i)) |
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newlen ++; |
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|
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if (newlen > len * 8) |
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newlen = len * 8; |
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|
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r = dev_fb_access(cpu, mem, relative_addr - |
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FRAMEBUFFER_BASE, buf2, newlen, writeflag, |
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d->vfb_data); |
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break; |
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case 0x2d: /* Block fill: */ |
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/* data is nr of pixels to fill minus one */ |
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newlen = memory_readmax64(cpu, data, len) + 1; |
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/* debug("YO addr=0x%08x, newlen=%i\n", relative_addr, |
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newlen); */ |
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if (newlen > MAX_XSIZE) |
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newlen = MAX_XSIZE; |
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memset(buf2, d->color, newlen); |
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r = dev_fb_access(cpu, mem, relative_addr - |
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FRAMEBUFFER_BASE, buf2, newlen, MEM_WRITE, |
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d->vfb_data); |
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break; |
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default: |
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r = dev_fb_access(cpu, mem, relative_addr - |
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FRAMEBUFFER_BASE, data, len, writeflag, |
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d->vfb_data); |
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} |
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return r; |
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} |
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|
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idata = memory_readmax64(cpu, data, len); |
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|
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/* Read from/write to the dec21030's registers: */ |
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reg = ((relative_addr - TGA_MEM_CREGS) & (TGA_CREGS_ALIAS - 1)) |
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/ sizeof(uint32_t); |
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switch (reg) { |
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|
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/* Color? (there are 8 of these, 2 used in 8-bit mode, |
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8 in 24-bit mode) */ |
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case TGA_REG_GBCR0: |
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if (writeflag == MEM_WRITE) |
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d->color = idata; |
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else |
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odata = d->color; |
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break; |
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|
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/* Board revision */ |
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/* case TGA_MEM_CREGS + sizeof(uint32_t) * TGA_REG_GREV: */ |
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case TGA_REG_GREV: |
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/* 01,02,03,04 (rev0) and 20,21,22 (rev1) are allowed */ |
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odata = 0x04; |
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break; |
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|
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/* Graphics Mode: */ |
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case TGA_REG_GMOR: |
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if (writeflag == MEM_WRITE) |
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d->graphics_mode = idata; |
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else |
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odata = d->graphics_mode; |
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break; |
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|
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/* Pixel mask: */ |
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case TGA_REG_GPXR_S: /* "one-shot" */ |
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case TGA_REG_GPXR_P: /* persistant */ |
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if (writeflag == MEM_WRITE) |
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d->pixel_mask = idata; |
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else |
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odata = d->pixel_mask; |
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break; |
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|
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/* Horizonsal size: */ |
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case TGA_REG_VHCR: |
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odata = dec21030_default_xsize / 4; /* lowest 9 bits */ |
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break; |
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|
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/* Vertical size: */ |
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case TGA_REG_VVCR: |
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odata = dec21030_default_ysize; /* lowest 11 bits */ |
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break; |
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|
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/* Block copy source: */ |
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case TGA_REG_GCSR: |
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d->copy_source = idata; |
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debug("[ dec21030: block copy source = 0x%08x ]\n", idata); |
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break; |
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|
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/* Block copy destination: */ |
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case TGA_REG_GCDR: |
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debug("[ dec21030: block copy destination = 0x%08x ]\n", idata); |
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newlen = 64; |
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/* Both source and destination are raw framebuffer addresses, |
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offset by 0x1000. */ |
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dev_fb_access(cpu, mem, d->copy_source - 0x1000, |
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buf2, newlen, MEM_READ, d->vfb_data); |
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dev_fb_access(cpu, mem, idata - 0x1000, |
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buf2, newlen, MEM_WRITE, d->vfb_data); |
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break; |
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|
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default: |
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if (writeflag == MEM_WRITE) |
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debug("[ dec21030: unimplemented write to address" |
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" 0x%x (=reg 0x%x), data=0x%02x ]\n", |
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(int)relative_addr, reg, (int)idata); |
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else |
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debug("[ dec21030: unimplemented read from address" |
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" 0x%x (=reg 0x%x) ]\n", (int)relative_addr, reg); |
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} |
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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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* pci_dec21030_init(): |
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*/ |
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void pci_dec21030_init(struct machine *machine, struct memory *mem) |
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{ |
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struct dec21030_data *d; |
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|
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d = malloc(sizeof(struct dec21030_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 dec21030_data)); |
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|
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/* TODO: this address is based on what NetBSD/arc uses... |
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fix this */ |
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memory_device_register(mem, "dec21030", 0x100000000ULL, |
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128*1048576, dev_dec21030_access, d, MEM_DEFAULT, NULL); |
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|
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/* |
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* TODO: I have no idea about how/where this framebuffer should |
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* be in relation to the pci device |
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*/ |
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d->vfb_data = dev_fb_init(machine, mem, FRAMEBUFFER_PADDR, VFB_GENERIC, |
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dec21030_default_xsize, dec21030_default_ysize, |
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dec21030_default_xsize, dec21030_default_ysize, 8, "TGA", 0); |
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} |
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