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/*
* linux/drivers/video/atafb.c -- Atari builtin chipset frame buffer device
*
* Copyright (C) 1994 Martin Schaller & Roman Hodek
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive
* for more details.
*
* History:
* - 03 Jan 95: Original version by Martin Schaller: The TT driver and
* all the device independent stuff
* - 09 Jan 95: Roman: I've added the hardware abstraction (hw_switch)
* and wrote the Falcon, ST(E), and External drivers
* based on the original TT driver.
* - 07 May 95: Martin: Added colormap operations for the external driver
* - 21 May 95: Martin: Added support for overscan
* Andreas: some bug fixes for this
* - Jul 95: Guenther Kelleter <guenther@pool.informatik.rwth-aachen.de>:
* Programmable Falcon video modes
* (thanks to Christian Cartus for documentation
* of VIDEL registers).
* - 27 Dec 95: Guenther: Implemented user definable video modes "user[0-7]"
* on minor 24...31. "user0" may be set on commandline by
* "R<x>;<y>;<depth>". (Makes sense only on Falcon)
* Video mode switch on Falcon now done at next VBL interrupt
* to avoid the annoying right shift of the screen.
* - 23 Sep 97: Juergen: added xres_virtual for cards like ProMST
* The external-part is legacy, therefore hardware-specific
* functions like panning/hardwarescrolling/blanking isn't
* supported.
* - 29 Sep 97: Juergen: added Romans suggestion for pan_display
* (var->xoffset was changed even if no set_screen_base avail.)
* - 05 Oct 97: Juergen: extfb (PACKED_PIXEL) is FB_PSEUDOCOLOR 'cause
* we know how to set the colors
* ext_*palette: read from ext_colors (former MV300_colors)
* write to ext_colors and RAMDAC
*
* To do:
* - For the Falcon it is not possible to set random video modes on
* SM124 and SC/TV, only the bootup resolution is supported.
*
*/
#define ATAFB_TT
#define ATAFB_STE
#define ATAFB_EXT
#define ATAFB_FALCON
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/tty.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <asm/setup.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
#include <asm/irq.h>
#include <asm/io.h>
#include <asm/atarihw.h>
#include <asm/atariints.h>
#include <asm/atari_stram.h>
#include <linux/fb.h>
#include <asm/atarikb.h>
#include <video/fbcon.h>
#include <video/fbcon-cfb8.h>
#include <video/fbcon-cfb16.h>
#include <video/fbcon-iplan2p2.h>
#include <video/fbcon-iplan2p4.h>
#include <video/fbcon-iplan2p8.h>
#include <video/fbcon-mfb.h>
#define SWITCH_ACIA 0x01 /* modes for switch on OverScan */
#define SWITCH_SND6 0x40
#define SWITCH_SND7 0x80
#define SWITCH_NONE 0x00
#define up(x, r) (((x) + (r) - 1) & ~((r)-1))
static int default_par=0; /* default resolution (0=none) */
static unsigned long default_mem_req=0;
static int hwscroll=-1;
static int use_hwscroll = 1;
static int sttt_xres=640,st_yres=400,tt_yres=480;
static int sttt_xres_virtual=640,sttt_yres_virtual=400;
static int ovsc_offset=0, ovsc_addlen=0;
static struct atafb_par {
void *screen_base;
int yres_virtual;
#if defined ATAFB_TT || defined ATAFB_STE
union {
struct {
int mode;
int sync;
} tt, st;
#endif
#ifdef ATAFB_FALCON
struct falcon_hw {
/* Here are fields for storing a video mode, as direct
* parameters for the hardware.
*/
short sync;
short line_width;
short line_offset;
short st_shift;
short f_shift;
short vid_control;
short vid_mode;
short xoffset;
short hht, hbb, hbe, hdb, hde, hss;
short vft, vbb, vbe, vdb, vde, vss;
/* auxiliary information */
short mono;
short ste_mode;
short bpp;
} falcon;
#endif
/* Nothing needed for external mode */
} hw;
} current_par;
/* Don't calculate an own resolution, and thus don't change the one found when
* booting (currently used for the Falcon to keep settings for internal video
* hardware extensions (e.g. ScreenBlaster) */
static int DontCalcRes = 0;
#ifdef ATAFB_FALCON
#define HHT hw.falcon.hht
#define HBB hw.falcon.hbb
#define HBE hw.falcon.hbe
#define HDB hw.falcon.hdb
#define HDE hw.falcon.hde
#define HSS hw.falcon.hss
#define VFT hw.falcon.vft
#define VBB hw.falcon.vbb
#define VBE hw.falcon.vbe
#define VDB hw.falcon.vdb
#define VDE hw.falcon.vde
#define VSS hw.falcon.vss
#define VCO_CLOCK25 0x04
#define VCO_CSYPOS 0x10
#define VCO_VSYPOS 0x20
#define VCO_HSYPOS 0x40
#define VCO_SHORTOFFS 0x100
#define VMO_DOUBLE 0x01
#define VMO_INTER 0x02
#define VMO_PREMASK 0x0c
#endif
static struct fb_info fb_info;
static void *screen_base; /* base address of screen */
static void *real_screen_base; /* (only for Overscan) */
static int screen_len;
static int current_par_valid=0;
static int mono_moni=0;
static struct display disp;
#ifdef ATAFB_EXT
/* external video handling */
static unsigned external_xres;
static unsigned external_xres_virtual;
static unsigned external_yres;
/* not needed - atafb will never support panning/hardwarescroll with external
* static unsigned external_yres_virtual;
*/
static unsigned external_depth;
static int external_pmode;
static void *external_addr = 0;
static unsigned long external_len;
static unsigned long external_vgaiobase = 0;
static unsigned int external_bitspercol = 6;
/*
JOE <joe@amber.dinoco.de>:
added card type for external driver, is only needed for
colormap handling.
*/
enum cardtype { IS_VGA, IS_MV300 };
static enum cardtype external_card_type = IS_VGA;
/*
The MV300 mixes the color registers. So we need an array of munged
indices in order to access the correct reg.
*/
static int MV300_reg_1bit[2]={0,1};
static int MV300_reg_4bit[16]={
0, 8, 4, 12, 2, 10, 6, 14, 1, 9, 5, 13, 3, 11, 7, 15 };
static int MV300_reg_8bit[256]={
0, 128, 64, 192, 32, 160, 96, 224, 16, 144, 80, 208, 48, 176, 112, 240,
8, 136, 72, 200, 40, 168, 104, 232, 24, 152, 88, 216, 56, 184, 120, 248,
4, 132, 68, 196, 36, 164, 100, 228, 20, 148, 84, 212, 52, 180, 116, 244,
12, 140, 76, 204, 44, 172, 108, 236, 28, 156, 92, 220, 60, 188, 124, 252,
2, 130, 66, 194, 34, 162, 98, 226, 18, 146, 82, 210, 50, 178, 114, 242,
10, 138, 74, 202, 42, 170, 106, 234, 26, 154, 90, 218, 58, 186, 122, 250,
6, 134, 70, 198, 38, 166, 102, 230, 22, 150, 86, 214, 54, 182, 118, 246,
14, 142, 78, 206, 46, 174, 110, 238, 30, 158, 94, 222, 62, 190, 126, 254,
1, 129, 65, 193, 33, 161, 97, 225, 17, 145, 81, 209, 49, 177, 113, 241,
9, 137, 73, 201, 41, 169, 105, 233, 25, 153, 89, 217, 57, 185, 121, 249,
5, 133, 69, 197, 37, 165, 101, 229, 21, 149, 85, 213, 53, 181, 117, 245,
13, 141, 77, 205, 45, 173, 109, 237, 29, 157, 93, 221, 61, 189, 125, 253,
3, 131, 67, 195, 35, 163, 99, 227, 19, 147, 83, 211, 51, 179, 115, 243,
11, 139, 75, 203, 43, 171, 107, 235, 27, 155, 91, 219, 59, 187, 123, 251,
7, 135, 71, 199, 39, 167, 103, 231, 23, 151, 87, 215, 55, 183, 119, 247,
15, 143, 79, 207, 47, 175, 111, 239, 31, 159, 95, 223, 63, 191, 127, 255 };
static int *MV300_reg = MV300_reg_8bit;
/*
And on the MV300 it's difficult to read out the hardware palette. So we
just keep track of the set colors in our own array here, and use that!
*/
static struct { unsigned char red,green,blue,pad; } ext_color[256];
#endif /* ATAFB_EXT */
static int inverse=0;
extern int fontheight_8x8;
extern int fontwidth_8x8;
extern unsigned char fontdata_8x8[];
extern int fontheight_8x16;
extern int fontwidth_8x16;
extern unsigned char fontdata_8x16[];
/* ++roman: This structure abstracts from the underlying hardware (ST(e),
* TT, or Falcon.
*
* int (*detect)( void )
* This function should detect the current video mode settings and
* store them in atafb_predefined[0] for later reference by the
* user. Return the index+1 of an equivalent predefined mode or 0
* if there is no such.
*
* int (*encode_fix)( struct fb_fix_screeninfo *fix,
* struct atafb_par *par )
* This function should fill in the 'fix' structure based on the
* values in the 'par' structure.
*
* int (*decode_var)( struct fb_var_screeninfo *var,
* struct atafb_par *par )
* Get the video params out of 'var'. If a value doesn't fit, round
* it up, if it's too big, return EINVAL.
* Round up in the following order: bits_per_pixel, xres, yres,
* xres_virtual, yres_virtual, xoffset, yoffset, grayscale, bitfields,
* horizontal timing, vertical timing.
*
* int (*encode_var)( struct fb_var_screeninfo *var,
* struct atafb_par *par );
* Fill the 'var' structure based on the values in 'par' and maybe
* other values read out of the hardware.
*
* void (*get_par)( struct atafb_par *par )
* Fill the hardware's 'par' structure.
*
* void (*set_par)( struct atafb_par *par )
* Set the hardware according to 'par'.
*
* int (*getcolreg)( unsigned regno, unsigned *red,
* unsigned *green, unsigned *blue,
* unsigned *transp, struct fb_info *info )
* Read a single color register and split it into
* colors/transparent. Return != 0 for invalid regno.
*
* void (*set_screen_base)(void *s_base)
* Set the base address of the displayed frame buffer. Only called
* if yres_virtual > yres or xres_virtual > xres.
*
* int (*blank)( int blank_mode )
* Blank the screen if blank_mode!=0, else unblank. If blank==NULL then
* the caller blanks by setting the CLUT to all black. Return 0 if blanking
* succeeded, !=0 if un-/blanking failed due to e.g. a video mode which
* doesn't support it. Implements VESA suspend and powerdown modes on
* hardware that supports disabling hsync/vsync:
* blank_mode==2: suspend vsync, 3:suspend hsync, 4: powerdown.
*/
static struct fb_hwswitch {
int (*detect)( void );
int (*encode_fix)( struct fb_fix_screeninfo *fix,
struct atafb_par *par );
int (*decode_var)( struct fb_var_screeninfo *var,
struct atafb_par *par );
int (*encode_var)( struct fb_var_screeninfo *var,
struct atafb_par *par );
void (*get_par)( struct atafb_par *par );
void (*set_par)( struct atafb_par *par );
int (*getcolreg)( unsigned regno, unsigned *red,
unsigned *green, unsigned *blue,
unsigned *transp, struct fb_info *info );
void (*set_screen_base)(void *s_base);
int (*blank)( int blank_mode );
int (*pan_display)( struct fb_var_screeninfo *var,
struct atafb_par *par);
} *fbhw;
static char *autodetect_names[] = {"autodetect", NULL};
static char *stlow_names[] = {"stlow", NULL};
static char *stmid_names[] = {"stmid", "default5", NULL};
static char *sthigh_names[] = {"sthigh", "default4", NULL};
static char *ttlow_names[] = {"ttlow", NULL};
static char *ttmid_names[]= {"ttmid", "default1", NULL};
static char *tthigh_names[]= {"tthigh", "default2", NULL};
static char *vga2_names[] = {"vga2", NULL};
static char *vga4_names[] = {"vga4", NULL};
static char *vga16_names[] = {"vga16", "default3", NULL};
static char *vga256_names[] = {"vga256", NULL};
static char *falh2_names[] = {"falh2", NULL};
static char *falh16_names[] = {"falh16", NULL};
static char **fb_var_names[] = {
/* Writing the name arrays directly in this array (via "(char *[]){...}")
* crashes gcc 2.5.8 (sigsegv) if the inner array
* contains more than two items. I've also seen that all elements
* were identical to the last (my cross-gcc) :-(*/
autodetect_names,
stlow_names,
stmid_names,
sthigh_names,
ttlow_names,
ttmid_names,
tthigh_names,
vga2_names,
vga4_names,
vga16_names,
vga256_names,
falh2_names,
falh16_names,
NULL
/* ,NULL */ /* this causes a sigsegv on my gcc-2.5.8 */
};
static struct fb_var_screeninfo atafb_predefined[] = {
/*
* yres_virtual==0 means use hw-scrolling if possible, else yres
*/
{ /* autodetect */
0, 0, 0, 0, 0, 0, 0, 0, /* xres-grayscale */
{0, 0, 0}, {0, 0, 0}, {0, 0, 0}, {0, 0, 0}, /* red green blue tran*/
0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
{ /* st low */
320, 200, 320, 0, 0, 0, 4, 0,
{0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
{ /* st mid */
640, 200, 640, 0, 0, 0, 2, 0,
{0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
{ /* st high */
640, 400, 640, 0, 0, 0, 1, 0,
{0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
{ /* tt low */
320, 480, 320, 0, 0, 0, 8, 0,
{0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
{ /* tt mid */
640, 480, 640, 0, 0, 0, 4, 0,
{0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
{ /* tt high */
1280, 960, 1280, 0, 0, 0, 1, 0,
{0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
{ /* vga2 */
640, 480, 640, 0, 0, 0, 1, 0,
{0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
{ /* vga4 */
640, 480, 640, 0, 0, 0, 2, 0,
{0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
{ /* vga16 */
640, 480, 640, 0, 0, 0, 4, 0,
{0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
{ /* vga256 */
640, 480, 640, 0, 0, 0, 8, 0,
{0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
{ /* falh2 */
896, 608, 896, 0, 0, 0, 1, 0,
{0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
{ /* falh16 */
896, 608, 896, 0, 0, 0, 4, 0,
{0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
};
static int num_atafb_predefined=ARRAY_SIZE(atafb_predefined);
static int
get_video_mode(char *vname)
{
char ***name_list;
char **name;
int i;
name_list=fb_var_names;
for (i = 0 ; i < num_atafb_predefined ; i++) {
name=*(name_list++);
if (! name || ! *name)
break;
while (*name) {
if (! strcmp(vname, *name))
return i+1;
name++;
}
}
return 0;
}
/* ------------------- TT specific functions ---------------------- */
#ifdef ATAFB_TT
static int tt_encode_fix( struct fb_fix_screeninfo *fix,
struct atafb_par *par )
{
int mode;
strcpy(fix->id,"Atari Builtin");
fix->smem_start = (unsigned long)real_screen_base;
fix->smem_len = screen_len;
fix->type=FB_TYPE_INTERLEAVED_PLANES;
fix->type_aux=2;
fix->visual=FB_VISUAL_PSEUDOCOLOR;
mode = par->hw.tt.mode & TT_SHIFTER_MODEMASK;
if (mode == TT_SHIFTER_TTHIGH || mode == TT_SHIFTER_STHIGH) {
fix->type=FB_TYPE_PACKED_PIXELS;
fix->type_aux=0;
if (mode == TT_SHIFTER_TTHIGH)
fix->visual=FB_VISUAL_MONO01;
}
fix->xpanstep=0;
fix->ypanstep=1;
fix->ywrapstep=0;
fix->line_length = 0;
fix->accel = FB_ACCEL_ATARIBLITT;
return 0;
}
static int tt_decode_var( struct fb_var_screeninfo *var,
struct atafb_par *par )
{
int xres=var->xres;
int yres=var->yres;
int bpp=var->bits_per_pixel;
int linelen;
int yres_virtual = var->yres_virtual;
if (mono_moni) {
if (bpp > 1 || xres > sttt_xres*2 || yres >tt_yres*2)
return -EINVAL;
par->hw.tt.mode=TT_SHIFTER_TTHIGH;
xres=sttt_xres*2;
yres=tt_yres*2;
bpp=1;
} else {
if (bpp > 8 || xres > sttt_xres || yres > tt_yres)
return -EINVAL;
if (bpp > 4) {
if (xres > sttt_xres/2 || yres > tt_yres)
return -EINVAL;
par->hw.tt.mode=TT_SHIFTER_TTLOW;
xres=sttt_xres/2;
yres=tt_yres;
bpp=8;
}
else if (bpp > 2) {
if (xres > sttt_xres || yres > tt_yres)
return -EINVAL;
if (xres > sttt_xres/2 || yres > st_yres/2) {
par->hw.tt.mode=TT_SHIFTER_TTMID;
xres=sttt_xres;
yres=tt_yres;
bpp=4;
}
else {
par->hw.tt.mode=TT_SHIFTER_STLOW;
xres=sttt_xres/2;
yres=st_yres/2;
bpp=4;
}
}
else if (bpp > 1) {
if (xres > sttt_xres || yres > st_yres/2)
return -EINVAL;
par->hw.tt.mode=TT_SHIFTER_STMID;
xres=sttt_xres;
yres=st_yres/2;
bpp=2;
}
else if (var->xres > sttt_xres || var->yres > st_yres) {
return -EINVAL;
}
else {
par->hw.tt.mode=TT_SHIFTER_STHIGH;
xres=sttt_xres;
yres=st_yres;
bpp=1;
}
}
if (yres_virtual <= 0)
yres_virtual = 0;
else if (yres_virtual < yres)
yres_virtual = yres;
if (var->sync & FB_SYNC_EXT)
par->hw.tt.sync=0;
else
par->hw.tt.sync=1;
linelen=xres*bpp/8;
if (yres_virtual * linelen > screen_len && screen_len)
return -EINVAL;
if (yres * linelen > screen_len && screen_len)
return -EINVAL;
if (var->yoffset + yres > yres_virtual && yres_virtual)
return -EINVAL;
par->yres_virtual = yres_virtual;
par->screen_base = screen_base + var->yoffset * linelen;
return 0;
}
static int tt_encode_var( struct fb_var_screeninfo *var,
struct atafb_par *par )
{
int linelen;
memset(var, 0, sizeof(struct fb_var_screeninfo));
var->red.offset=0;
var->red.length=4;
var->red.msb_right=0;
var->grayscale=0;
var->pixclock=31041;
var->left_margin=120; /* these may be incorrect */
var->right_margin=100;
var->upper_margin=8;
var->lower_margin=16;
var->hsync_len=140;
var->vsync_len=30;
var->height=-1;
var->width=-1;
if (par->hw.tt.sync & 1)
var->sync=0;
else
var->sync=FB_SYNC_EXT;
switch (par->hw.tt.mode & TT_SHIFTER_MODEMASK) {
case TT_SHIFTER_STLOW:
var->xres=sttt_xres/2;
var->xres_virtual=sttt_xres_virtual/2;
var->yres=st_yres/2;
var->bits_per_pixel=4;
break;
case TT_SHIFTER_STMID:
var->xres=sttt_xres;
var->xres_virtual=sttt_xres_virtual;
var->yres=st_yres/2;
var->bits_per_pixel=2;
break;
case TT_SHIFTER_STHIGH:
var->xres=sttt_xres;
var->xres_virtual=sttt_xres_virtual;
var->yres=st_yres;
var->bits_per_pixel=1;
break;
case TT_SHIFTER_TTLOW:
var->xres=sttt_xres/2;
var->xres_virtual=sttt_xres_virtual/2;
var->yres=tt_yres;
var->bits_per_pixel=8;
break;
case TT_SHIFTER_TTMID:
var->xres=sttt_xres;
var->xres_virtual=sttt_xres_virtual;
var->yres=tt_yres;
var->bits_per_pixel=4;
break;
case TT_SHIFTER_TTHIGH:
var->red.length=0;
var->xres=sttt_xres*2;
var->xres_virtual=sttt_xres_virtual*2;
var->yres=tt_yres*2;
var->bits_per_pixel=1;
break;
}
var->blue=var->green=var->red;
var->transp.offset=0;
var->transp.length=0;
var->transp.msb_right=0;
linelen=var->xres_virtual * var->bits_per_pixel / 8;
if (! use_hwscroll)
var->yres_virtual=var->yres;
else if (screen_len) {
if (par->yres_virtual)
var->yres_virtual = par->yres_virtual;
else
/* yres_virtual==0 means use maximum */
var->yres_virtual = screen_len / linelen;
} else {
if (hwscroll < 0)
var->yres_virtual = 2 * var->yres;
else
var->yres_virtual=var->yres+hwscroll * 16;
}
var->xoffset=0;
if (screen_base)
var->yoffset=(par->screen_base - screen_base)/linelen;
else
var->yoffset=0;
var->nonstd=0;
var->activate=0;
var->vmode=FB_VMODE_NONINTERLACED;
return 0;
}
static void tt_get_par( struct atafb_par *par )
{
unsigned long addr;
par->hw.tt.mode=shifter_tt.tt_shiftmode;
par->hw.tt.sync=shifter.syncmode;
addr = ((shifter.bas_hi & 0xff) << 16) |
((shifter.bas_md & 0xff) << 8) |
((shifter.bas_lo & 0xff));
par->screen_base = phys_to_virt(addr);
}
static void tt_set_par( struct atafb_par *par )
{
shifter_tt.tt_shiftmode=par->hw.tt.mode;
shifter.syncmode=par->hw.tt.sync;
/* only set screen_base if really necessary */
if (current_par.screen_base != par->screen_base)
fbhw->set_screen_base(par->screen_base);
}
static int tt_getcolreg(unsigned regno, unsigned *red,
unsigned *green, unsigned *blue,
unsigned *transp, struct fb_info *info)
{
int t, col;
if ((shifter_tt.tt_shiftmode & TT_SHIFTER_MODEMASK) == TT_SHIFTER_STHIGH)
regno += 254;
if (regno > 255)
return 1;
t = tt_palette[regno];
col = t & 15;
col |= col << 4;
col |= col << 8;
*blue = col;
col = (t >> 4) & 15;
col |= col << 4;
col |= col << 8;
*green = col;
col = (t >> 8) & 15;
col |= col << 4;
col |= col << 8;
*red = col;
*transp = 0;
return 0;
}
static int tt_setcolreg(unsigned regno, unsigned red,
unsigned green, unsigned blue,
unsigned transp, struct fb_info *info)
{
if ((shifter_tt.tt_shiftmode & TT_SHIFTER_MODEMASK) == TT_SHIFTER_STHIGH)
regno += 254;
if (regno > 255)
return 1;
tt_palette[regno] = (((red >> 12) << 8) | ((green >> 12) << 4) |
(blue >> 12));
if ((shifter_tt.tt_shiftmode & TT_SHIFTER_MODEMASK) ==
TT_SHIFTER_STHIGH && regno == 254)
tt_palette[0] = 0;
return 0;
}
static int tt_detect( void )
{ struct atafb_par par;
/* Determine the connected monitor: The DMA sound must be
* disabled before reading the MFP GPIP, because the Sound
* Done Signal and the Monochrome Detect are XORed together!
*
* Even on a TT, we should look if there is a DMA sound. It was
* announced that the Eagle is TT compatible, but only the PCM is
* missing...
*/
if (ATARIHW_PRESENT(PCM_8BIT)) {
tt_dmasnd.ctrl = DMASND_CTRL_OFF;
udelay(20); /* wait a while for things to settle down */
}
mono_moni = (mfp.par_dt_reg & 0x80) == 0;
tt_get_par(&par);
tt_encode_var(&atafb_predefined[0], &par);
return 1;
}
#endif /* ATAFB_TT */
/* ------------------- Falcon specific functions ---------------------- */
#ifdef ATAFB_FALCON
static int mon_type; /* Falcon connected monitor */
static int f030_bus_width; /* Falcon ram bus width (for vid_control) */
#define F_MON_SM 0
#define F_MON_SC 1
#define F_MON_VGA 2
#define F_MON_TV 3
static struct pixel_clock {
unsigned long f; /* f/[Hz] */
unsigned long t; /* t/[ps] (=1/f) */
int right, hsync, left; /* standard timing in clock cycles, not pixel */
/* hsync initialized in falcon_detect() */
int sync_mask; /* or-mask for hw.falcon.sync to set this clock */
int control_mask; /* ditto, for hw.falcon.vid_control */
}
f25 = {25175000, 39721, 18, 0, 42, 0x0, VCO_CLOCK25},
f32 = {32000000, 31250, 18, 0, 42, 0x0, 0},
fext = { 0, 0, 18, 0, 42, 0x1, 0};
/* VIDEL-prescale values [mon_type][pixel_length from VCO] */
static int vdl_prescale[4][3] = {{4,2,1}, {4,2,1}, {4,2,2}, {4,2,1}};
/* Default hsync timing [mon_type] in picoseconds */
static long h_syncs[4] = {3000000, 4875000, 4000000, 4875000};
#ifdef FBCON_HAS_CFB16
static u16 fbcon_cfb16_cmap[16];
#endif
static inline int hxx_prescale(struct falcon_hw *hw)
{
return hw->ste_mode ? 16 :
vdl_prescale[mon_type][hw->vid_mode >> 2 & 0x3];
}
static int falcon_encode_fix( struct fb_fix_screeninfo *fix,
struct atafb_par *par )
{
strcpy(fix->id, "Atari Builtin");
fix->smem_start = (unsigned long)real_screen_base;
fix->smem_len = screen_len;
fix->type = FB_TYPE_INTERLEAVED_PLANES;
fix->type_aux = 2;
fix->visual = FB_VISUAL_PSEUDOCOLOR;
fix->xpanstep = 1;
fix->ypanstep = 1;
fix->ywrapstep = 0;
if (par->hw.falcon.mono) {
fix->type = FB_TYPE_PACKED_PIXELS;
fix->type_aux = 0;
/* no smooth scrolling with longword aligned video mem */
fix->xpanstep = 32;
}
else if (par->hw.falcon.f_shift & 0x100) {
fix->type = FB_TYPE_PACKED_PIXELS;
fix->type_aux = 0;
/* Is this ok or should it be DIRECTCOLOR? */
fix->visual = FB_VISUAL_TRUECOLOR;
fix->xpanstep = 2;
}
fix->line_length = 0;
fix->accel = FB_ACCEL_ATARIBLITT;
return 0;
}
static int falcon_decode_var( struct fb_var_screeninfo *var,
struct atafb_par *par )
{
int bpp = var->bits_per_pixel;
int xres = var->xres;
int yres = var->yres;
int xres_virtual = var->xres_virtual;
int yres_virtual = var->yres_virtual;
int left_margin, right_margin, hsync_len;
int upper_margin, lower_margin, vsync_len;
int linelen;
int interlace = 0, doubleline = 0;
struct pixel_clock *pclock;
int plen; /* width of pixel in clock cycles */
int xstretch;
int prescale;
int longoffset = 0;
int hfreq, vfreq;
/*
Get the video params out of 'var'. If a value doesn't fit, round
it up, if it's too big, return EINVAL.
Round up in the following order: bits_per_pixel, xres, yres,
xres_virtual, yres_virtual, xoffset, yoffset, grayscale, bitfields,
horizontal timing, vertical timing.
There is a maximum of screen resolution determined by pixelclock
and minimum frame rate -- (X+hmarg.)*(Y+vmarg.)*vfmin <= pixelclock.
In interlace mode this is " * " *vfmin <= pixelclock.
Additional constraints: hfreq.
Frequency range for multisync monitors is given via command line.
For TV and SM124 both frequencies are fixed.
X % 16 == 0 to fit 8x?? font (except 1 bitplane modes must use X%32==0)
Y % 16 == 0 to fit 8x16 font
Y % 8 == 0 if Y<400
Currently interlace and doubleline mode in var are ignored.
On SM124 and TV only the standard resolutions can be used.
*/
/* Reject uninitialized mode */
if (!xres || !yres || !bpp)
return -EINVAL;
if (mon_type == F_MON_SM && bpp != 1) {
return -EINVAL;
}
else if (bpp <= 1) {
bpp = 1;
par->hw.falcon.f_shift = 0x400;
par->hw.falcon.st_shift = 0x200;
}
else if (bpp <= 2) {
bpp = 2;
par->hw.falcon.f_shift = 0x000;
par->hw.falcon.st_shift = 0x100;
}
else if (bpp <= 4) {
bpp = 4;
par->hw.falcon.f_shift = 0x000;
par->hw.falcon.st_shift = 0x000;
}
else if (bpp <= 8) {
bpp = 8;
par->hw.falcon.f_shift = 0x010;
}
else if (bpp <= 16) {
bpp = 16; /* packed pixel mode */
par->hw.falcon.f_shift = 0x100; /* hicolor, no overlay */
}
else
return -EINVAL;
par->hw.falcon.bpp = bpp;
if (mon_type == F_MON_SM || DontCalcRes) {
/* Skip all calculations. VGA/TV/SC1224 only supported. */
struct fb_var_screeninfo *myvar = &atafb_predefined[0];
if (bpp > myvar->bits_per_pixel ||
var->xres > myvar->xres ||
var->yres > myvar->yres)
return -EINVAL;
fbhw->get_par(par); /* Current par will be new par */
goto set_screen_base; /* Don't forget this */
}
/* Only some fixed resolutions < 640x400 */
if (xres <= 320)
xres = 320;
else if (xres <= 640 && bpp != 16)
xres = 640;
if (yres <= 200)
yres = 200;
else if (yres <= 240)
yres = 240;
else if (yres <= 400)
yres = 400;
/* 2 planes must use STE compatibility mode */
par->hw.falcon.ste_mode = bpp==2;
par->hw.falcon.mono = bpp==1;
/* Total and visible scanline length must be a multiple of one longword,
* this and the console fontwidth yields the alignment for xres and
* xres_virtual.
* TODO: this way "odd" fontheights are not supported
*
* Special case in STE mode: blank and graphic positions don't align,
* avoid trash at right margin
*/
if (par->hw.falcon.ste_mode)
xres = (xres + 63) & ~63;
else if (bpp == 1)
xres = (xres + 31) & ~31;
else
xres = (xres + 15) & ~15;
if (yres >= 400)
yres = (yres + 15) & ~15;
else
yres = (yres + 7) & ~7;
if (xres_virtual < xres)
xres_virtual = xres;
else if (bpp == 1)
xres_virtual = (xres_virtual + 31) & ~31;
else
xres_virtual = (xres_virtual + 15) & ~15;
if (yres_virtual <= 0)
yres_virtual = 0;
else if (yres_virtual < yres)
yres_virtual = yres;
/* backward bug-compatibility */
if (var->pixclock > 1)
var->pixclock -= 1;
par->hw.falcon.line_width = bpp * xres / 16;
par->hw.falcon.line_offset = bpp * (xres_virtual - xres) / 16;
/* single or double pixel width */
xstretch = (xres < 640) ? 2 : 1;
#if 0 /* SM124 supports only 640x400, this is rejected above */
if (mon_type == F_MON_SM) {
if (xres != 640 && yres != 400)
return -EINVAL;
plen = 1;
pclock = &f32;
/* SM124-mode is special */
par->hw.falcon.ste_mode = 1;
par->hw.falcon.f_shift = 0x000;
par->hw.falcon.st_shift = 0x200;
left_margin = hsync_len = 128 / plen;
right_margin = 0;
/* TODO set all margins */
}
else
#endif
if (mon_type == F_MON_SC || mon_type == F_MON_TV) {
plen = 2 * xstretch;
if (var->pixclock > f32.t * plen)
return -EINVAL;
pclock = &f32;
if (yres > 240)
interlace = 1;
if (var->pixclock == 0) {
/* set some minimal margins which center the screen */
left_margin = 32;
right_margin = 18;
hsync_len = pclock->hsync / plen;
upper_margin = 31;
lower_margin = 14;
vsync_len = interlace ? 3 : 4;
} else {
left_margin = var->left_margin;
right_margin = var->right_margin;
hsync_len = var->hsync_len;
upper_margin = var->upper_margin;
lower_margin = var->lower_margin;
vsync_len = var->vsync_len;
if (var->vmode & FB_VMODE_INTERLACED) {
upper_margin = (upper_margin + 1) / 2;
lower_margin = (lower_margin + 1) / 2;
vsync_len = (vsync_len + 1) / 2;
} else if (var->vmode & FB_VMODE_DOUBLE) {
upper_margin *= 2;
lower_margin *= 2;
vsync_len *= 2;
}
}
}
else
{ /* F_MON_VGA */
if (bpp == 16)
xstretch = 2; /* Double pixel width only for hicolor */
/* Default values are used for vert./hor. timing if no pixelclock given. */
if (var->pixclock == 0) {
int linesize;
/* Choose master pixelclock depending on hor. timing */
plen = 1 * xstretch;
if ((plen * xres + f25.right+f25.hsync+f25.left) *
fb_info.monspecs.hfmin < f25.f)
pclock = &f25;
else if ((plen * xres + f32.right+f32.hsync+f32.left) *
fb_info.monspecs.hfmin < f32.f)
pclock = &f32;
else if ((plen * xres + fext.right+fext.hsync+fext.left) *
fb_info.monspecs.hfmin < fext.f
&& fext.f)
pclock = &fext;
else
return -EINVAL;
left_margin = pclock->left / plen;
right_margin = pclock->right / plen;
hsync_len = pclock->hsync / plen;
linesize = left_margin + xres + right_margin + hsync_len;
upper_margin = 31;
lower_margin = 11;
vsync_len = 3;
}
else {
/* Choose largest pixelclock <= wanted clock */
int i;
unsigned long pcl = ULONG_MAX;
pclock = 0;
for (i=1; i <= 4; i *= 2) {
if (f25.t*i >= var->pixclock && f25.t*i < pcl) {
pcl = f25.t * i;
pclock = &f25;
}
if (f32.t*i >= var->pixclock && f32.t*i < pcl) {
pcl = f32.t * i;
pclock = &f32;
}
if (fext.t && fext.t*i >= var->pixclock && fext.t*i < pcl) {
pcl = fext.t * i;
pclock = &fext;
}
}
if (!pclock)
return -EINVAL;
plen = pcl / pclock->t;
left_margin = var->left_margin;
right_margin = var->right_margin;
hsync_len = var->hsync_len;
upper_margin = var->upper_margin;
lower_margin = var->lower_margin;
vsync_len = var->vsync_len;
/* Internal unit is [single lines per (half-)frame] */
if (var->vmode & FB_VMODE_INTERLACED) {
/* # lines in half frame */
/* External unit is [lines per full frame] */
upper_margin = (upper_margin + 1) / 2;
lower_margin = (lower_margin + 1) / 2;
vsync_len = (vsync_len + 1) / 2;
}
else if (var->vmode & FB_VMODE_DOUBLE) {
/* External unit is [double lines per frame] */
upper_margin *= 2;
lower_margin *= 2;
vsync_len *= 2;
}
}
if (pclock == &fext)
longoffset = 1; /* VIDEL doesn't synchronize on short offset */
}
/* Is video bus bandwidth (32MB/s) too low for this resolution? */
/* this is definitely wrong if bus clock != 32MHz */
if (pclock->f / plen / 8 * bpp > 32000000L)
return -EINVAL;
if (vsync_len < 1)
vsync_len = 1;
/* include sync lengths in right/lower margin for all calculations */
right_margin += hsync_len;
lower_margin += vsync_len;
/* ! In all calculations of margins we use # of lines in half frame
* (which is a full frame in non-interlace mode), so we can switch
* between interlace and non-interlace without messing around
* with these.
*/
again:
/* Set base_offset 128 and video bus width */
par->hw.falcon.vid_control = mon_type | f030_bus_width;
if (!longoffset)
par->hw.falcon.vid_control |= VCO_SHORTOFFS; /* base_offset 64 */
if (var->sync & FB_SYNC_HOR_HIGH_ACT)
par->hw.falcon.vid_control |= VCO_HSYPOS;
if (var->sync & FB_SYNC_VERT_HIGH_ACT)
par->hw.falcon.vid_control |= VCO_VSYPOS;
/* Pixelclock */
par->hw.falcon.vid_control |= pclock->control_mask;
/* External or internal clock */
par->hw.falcon.sync = pclock->sync_mask | 0x2;
/* Pixellength and prescale */
par->hw.falcon.vid_mode = (2/plen) << 2;
if (doubleline)
par->hw.falcon.vid_mode |= VMO_DOUBLE;
if (interlace)
par->hw.falcon.vid_mode |= VMO_INTER;
/*********************
Horizontal timing: unit = [master clock cycles]
unit of hxx-registers: [master clock cycles * prescale]
Hxx-registers are 9 bit wide
1 line = ((hht + 2) * 2 * prescale) clock cycles
graphic output = hdb & 0x200 ?
((hht+2)*2 - hdb + hde) * prescale - hdboff + hdeoff:
( hht + 2 - hdb + hde) * prescale - hdboff + hdeoff
(this must be a multiple of plen*128/bpp, on VGA pixels
to the right may be cut off with a bigger right margin)
start of graphics relative to start of 1st halfline = hdb & 0x200 ?
(hdb - hht - 2) * prescale + hdboff :
hdb * prescale + hdboff
end of graphics relative to start of 1st halfline =
(hde + hht + 2) * prescale + hdeoff
*********************/
/* Calculate VIDEL registers */
{
int hdb_off, hde_off, base_off;
int gstart, gend1, gend2, align;
prescale = hxx_prescale(&par->hw.falcon);
base_off = par->hw.falcon.vid_control & VCO_SHORTOFFS ? 64 : 128;
/* Offsets depend on video mode */
/* Offsets are in clock cycles, divide by prescale to
* calculate hd[be]-registers
*/
if (par->hw.falcon.f_shift & 0x100) {
align = 1;
hde_off = 0;
hdb_off = (base_off + 16 * plen) + prescale;
}
else {
align = 128 / bpp;
hde_off = ((128 / bpp + 2) * plen);
if (par->hw.falcon.ste_mode)
hdb_off = (64 + base_off + (128 / bpp + 2) * plen) + prescale;
else
hdb_off = (base_off + (128 / bpp + 18) * plen) + prescale;
}
gstart = (prescale/2 + plen * left_margin) / prescale;
/* gend1 is for hde (gend-gstart multiple of align), shifter's xres */
gend1 = gstart + ((xres + align-1) / align)*align * plen / prescale;
/* gend2 is for hbb, visible xres (rest to gend1 is cut off by hblank) */
gend2 = gstart + xres * plen / prescale;
par->HHT = plen * (left_margin + xres + right_margin) /
(2 * prescale) - 2;
/* par->HHT = (gend2 + plen * right_margin / prescale) / 2 - 2;*/
par->HDB = gstart - hdb_off/prescale;
par->HBE = gstart;
if (par->HDB < 0) par->HDB += par->HHT + 2 + 0x200;
par->HDE = gend1 - par->HHT - 2 - hde_off/prescale;
par->HBB = gend2 - par->HHT - 2;
#if 0
/* One more Videl constraint: data fetch of two lines must not overlap */
if ((par->HDB & 0x200) && (par->HDB & ~0x200) - par->HDE <= 5) {
/* if this happens increase margins, decrease hfreq. */
}
#endif
if (hde_off % prescale)
par->HBB++; /* compensate for non matching hde and hbb */
par->HSS = par->HHT + 2 - plen * hsync_len / prescale;
if (par->HSS < par->HBB)
par->HSS = par->HBB;
}
/* check hor. frequency */
hfreq = pclock->f / ((par->HHT+2)*prescale*2);
if (hfreq > fb_info.monspecs.hfmax && mon_type!=F_MON_VGA) {
/* ++guenther: ^^^^^^^^^^^^^^^^^^^ can't remember why I did this */
/* Too high -> enlarge margin */
left_margin += 1;
right_margin += 1;
goto again;
}
if (hfreq > fb_info.monspecs.hfmax || hfreq < fb_info.monspecs.hfmin)
return -EINVAL;
/* Vxx-registers */
/* All Vxx must be odd in non-interlace, since frame starts in the middle
* of the first displayed line!
* One frame consists of VFT+1 half lines. VFT+1 must be even in
* non-interlace, odd in interlace mode for synchronisation.
* Vxx-registers are 11 bit wide
*/
par->VBE = (upper_margin * 2 + 1); /* must begin on odd halfline */
par->VDB = par->VBE;
par->VDE = yres;
if (!interlace) par->VDE <<= 1;
if (doubleline) par->VDE <<= 1; /* VDE now half lines per (half-)frame */
par->VDE += par->VDB;
par->VBB = par->VDE;
par->VFT = par->VBB + (lower_margin * 2 - 1) - 1;
par->VSS = par->VFT+1 - (vsync_len * 2 - 1);
/* vbb,vss,vft must be even in interlace mode */
if (interlace) {
par->VBB++;
par->VSS++;
par->VFT++;
}
/* V-frequency check, hope I didn't create any loop here. */
/* Interlace and doubleline are mutually exclusive. */
vfreq = (hfreq * 2) / (par->VFT + 1);
if (vfreq > fb_info.monspecs.vfmax && !doubleline && !interlace) {
/* Too high -> try again with doubleline */
doubleline = 1;
goto again;
}
else if (vfreq < fb_info.monspecs.vfmin && !interlace && !doubleline) {
/* Too low -> try again with interlace */
interlace = 1;
goto again;
}
else if (vfreq < fb_info.monspecs.vfmin && doubleline) {
/* Doubleline too low -> clear doubleline and enlarge margins */
int lines;
doubleline = 0;
for (lines=0;
(hfreq*2)/(par->VFT+1+4*lines-2*yres)>fb_info.monspecs.vfmax;
lines++)
;
upper_margin += lines;
lower_margin += lines;
goto again;
}
else if (vfreq > fb_info.monspecs.vfmax && doubleline) {
/* Doubleline too high -> enlarge margins */
int lines;
for (lines=0;
(hfreq*2)/(par->VFT+1+4*lines)>fb_info.monspecs.vfmax;
lines+=2)
;
upper_margin += lines;
lower_margin += lines;
goto again;
}
else if (vfreq > fb_info.monspecs.vfmax && interlace) {
/* Interlace, too high -> enlarge margins */
int lines;
for (lines=0;
(hfreq*2)/(par->VFT+1+4*lines)>fb_info.monspecs.vfmax;
lines++)
;
upper_margin += lines;
lower_margin += lines;
goto again;
}
else if (vfreq < fb_info.monspecs.vfmin ||
vfreq > fb_info.monspecs.vfmax)
return -EINVAL;
set_screen_base:
linelen = xres_virtual * bpp / 8;
if (yres_virtual * linelen > screen_len && screen_len)
return -EINVAL;
if (yres * linelen > screen_len && screen_len)
return -EINVAL;
if (var->yoffset + yres > yres_virtual && yres_virtual)
return -EINVAL;
par->yres_virtual = yres_virtual;
par->screen_base = screen_base + var->yoffset * linelen;
par->hw.falcon.xoffset = 0;
return 0;
}
static int falcon_encode_var( struct fb_var_screeninfo *var,
struct atafb_par *par )
{
/* !!! only for VGA !!! */
int linelen;
int prescale, plen;
int hdb_off, hde_off, base_off;
struct falcon_hw *hw = &par->hw.falcon;
memset(var, 0, sizeof(struct fb_var_screeninfo));
/* possible frequencies: 25.175 or 32MHz */
var->pixclock = hw->sync & 0x1 ? fext.t :
hw->vid_control & VCO_CLOCK25 ? f25.t : f32.t;
var->height=-1;
var->width=-1;
var->sync=0;
if (hw->vid_control & VCO_HSYPOS)
var->sync |= FB_SYNC_HOR_HIGH_ACT;
if (hw->vid_control & VCO_VSYPOS)
var->sync |= FB_SYNC_VERT_HIGH_ACT;
var->vmode = FB_VMODE_NONINTERLACED;
if (hw->vid_mode & VMO_INTER)
var->vmode |= FB_VMODE_INTERLACED;
if (hw->vid_mode & VMO_DOUBLE)
var->vmode |= FB_VMODE_DOUBLE;
/* visible y resolution:
* Graphics display starts at line VDB and ends at line
* VDE. If interlace mode off unit of VC-registers is
* half lines, else lines.
*/
var->yres = hw->vde - hw->vdb;
if (!(var->vmode & FB_VMODE_INTERLACED))
var->yres >>= 1;
if (var->vmode & FB_VMODE_DOUBLE)
var->yres >>= 1;
/* to get bpp, we must examine f_shift and st_shift.
* f_shift is valid if any of bits no. 10, 8 or 4
* is set. Priority in f_shift is: 10 ">" 8 ">" 4, i.e.
* if bit 10 set then bit 8 and bit 4 don't care...
* If all these bits are 0 get display depth from st_shift
* (as for ST and STE)
*/
if (hw->f_shift & 0x400) /* 2 colors */
var->bits_per_pixel = 1;
else if (hw->f_shift & 0x100) /* hicolor */
var->bits_per_pixel = 16;
else if (hw->f_shift & 0x010) /* 8 bitplanes */
var->bits_per_pixel = 8;
else if (hw->st_shift == 0)
var->bits_per_pixel = 4;
else if (hw->st_shift == 0x100)
var->bits_per_pixel = 2;
else /* if (hw->st_shift == 0x200) */
var->bits_per_pixel = 1;
var->xres = hw->line_width * 16 / var->bits_per_pixel;
var->xres_virtual = var->xres + hw->line_offset * 16 / var->bits_per_pixel;
if (hw->xoffset)
var->xres_virtual += 16;
if (var->bits_per_pixel == 16) {
var->red.offset=11;
var->red.length=5;
var->red.msb_right=0;
var->green.offset=5;
var->green.length=6;
var->green.msb_right=0;
var->blue.offset=0;
var->blue.length=5;
var->blue.msb_right=0;
}
else {
var->red.offset=0;
var->red.length = hw->ste_mode ? 4 : 6;
var->red.msb_right=0;
var->grayscale=0;
var->blue=var->green=var->red;
}
var->transp.offset=0;
var->transp.length=0;
var->transp.msb_right=0;
linelen = var->xres_virtual * var->bits_per_pixel / 8;
if (screen_len) {
if (par->yres_virtual)
var->yres_virtual = par->yres_virtual;
else
/* yres_virtual==0 means use maximum */
var->yres_virtual = screen_len / linelen;
}
else {
if (hwscroll < 0)
var->yres_virtual = 2 * var->yres;
else
var->yres_virtual=var->yres+hwscroll * 16;
}
var->xoffset=0; /* TODO change this */
/* hdX-offsets */
prescale = hxx_prescale(hw);
plen = 4 >> (hw->vid_mode >> 2 & 0x3);
base_off = hw->vid_control & VCO_SHORTOFFS ? 64 : 128;
if (hw->f_shift & 0x100) {
hde_off = 0;
hdb_off = (base_off + 16 * plen) + prescale;
}
else {
hde_off = ((128 / var->bits_per_pixel + 2) * plen);
if (hw->ste_mode)
hdb_off = (64 + base_off + (128 / var->bits_per_pixel + 2) * plen)
+ prescale;
else
hdb_off = (base_off + (128 / var->bits_per_pixel + 18) * plen)
+ prescale;
}
/* Right margin includes hsync */
var->left_margin = hdb_off + prescale * ((hw->hdb & 0x1ff) -
(hw->hdb & 0x200 ? 2+hw->hht : 0));
if (hw->ste_mode || mon_type!=F_MON_VGA)
var->right_margin = prescale * (hw->hht + 2 - hw->hde) - hde_off;
else
/* can't use this in ste_mode, because hbb is +1 off */
var->right_margin = prescale * (hw->hht + 2 - hw->hbb);
var->hsync_len = prescale * (hw->hht + 2 - hw->hss);
/* Lower margin includes vsync */
var->upper_margin = hw->vdb / 2 ; /* round down to full lines */
var->lower_margin = (hw->vft+1 - hw->vde + 1) / 2; /* round up */
var->vsync_len = (hw->vft+1 - hw->vss + 1) / 2; /* round up */
if (var->vmode & FB_VMODE_INTERLACED) {
var->upper_margin *= 2;
var->lower_margin *= 2;
var->vsync_len *= 2;
}
else if (var->vmode & FB_VMODE_DOUBLE) {
var->upper_margin = (var->upper_margin + 1) / 2;
var->lower_margin = (var->lower_margin + 1) / 2;
var->vsync_len = (var->vsync_len + 1) / 2;
}
var->pixclock *= plen;
var->left_margin /= plen;
var->right_margin /= plen;
var->hsync_len /= plen;
var->right_margin -= var->hsync_len;
var->lower_margin -= var->vsync_len;
if (screen_base)
var->yoffset=(par->screen_base - screen_base)/linelen;
else
var->yoffset=0;
var->nonstd=0; /* what is this for? */
var->activate=0;
return 0;
}
static int f_change_mode = 0;
static struct falcon_hw f_new_mode;
static int f_pan_display = 0;
static void falcon_get_par( struct atafb_par *par )
{
unsigned long addr;
struct falcon_hw *hw = &par->hw.falcon;
hw->line_width = shifter_f030.scn_width;
hw->line_offset = shifter_f030.off_next;
hw->st_shift = videl.st_shift & 0x300;
hw->f_shift = videl.f_shift;
hw->vid_control = videl.control;
hw->vid_mode = videl.mode;
hw->sync = shifter.syncmode & 0x1;
hw->xoffset = videl.xoffset & 0xf;
hw->hht = videl.hht;
hw->hbb = videl.hbb;
hw->hbe = videl.hbe;
hw->hdb = videl.hdb;
hw->hde = videl.hde;
hw->hss = videl.hss;
hw->vft = videl.vft;
hw->vbb = videl.vbb;
hw->vbe = videl.vbe;
hw->vdb = videl.vdb;
hw->vde = videl.vde;
hw->vss = videl.vss;
addr = (shifter.bas_hi & 0xff) << 16 |
(shifter.bas_md & 0xff) << 8 |
(shifter.bas_lo & 0xff);
par->screen_base = phys_to_virt(addr);
/* derived parameters */
hw->ste_mode = (hw->f_shift & 0x510)==0 && hw->st_shift==0x100;
hw->mono = (hw->f_shift & 0x400) ||
((hw->f_shift & 0x510)==0 && hw->st_shift==0x200);
}
static void falcon_set_par( struct atafb_par *par )
{
f_change_mode = 0;
/* only set screen_base if really necessary */
if (current_par.screen_base != par->screen_base)
fbhw->set_screen_base(par->screen_base);
/* Don't touch any other registers if we keep the default resolution */
if (DontCalcRes)
return;
/* Tell vbl-handler to change video mode.
* We change modes only on next VBL, to avoid desynchronisation
* (a shift to the right and wrap around by a random number of pixels
* in all monochrome modes).
* This seems to work on my Falcon.
*/
f_new_mode = par->hw.falcon;
f_change_mode = 1;
}
static irqreturn_t falcon_vbl_switcher( int irq, void *dummy, struct pt_regs *fp )
{
struct falcon_hw *hw = &f_new_mode;
if (f_change_mode) {
f_change_mode = 0;
if (hw->sync & 0x1) {
/* Enable external pixelclock. This code only for ScreenWonder */
*(volatile unsigned short*)0xffff9202 = 0xffbf;
}
else {
/* Turn off external clocks. Read sets all output bits to 1. */
*(volatile unsigned short*)0xffff9202;
}
shifter.syncmode = hw->sync;
videl.hht = hw->hht;
videl.hbb = hw->hbb;
videl.hbe = hw->hbe;
videl.hdb = hw->hdb;
videl.hde = hw->hde;
videl.hss = hw->hss;
videl.vft = hw->vft;
videl.vbb = hw->vbb;
videl.vbe = hw->vbe;
videl.vdb = hw->vdb;
videl.vde = hw->vde;
videl.vss = hw->vss;
videl.f_shift = 0; /* write enables Falcon palette, 0: 4 planes */
if (hw->ste_mode) {
videl.st_shift = hw->st_shift; /* write enables STE palette */
}
else {
/* IMPORTANT:
* set st_shift 0, so we can tell the screen-depth if f_shift==0.
* Writing 0 to f_shift enables 4 plane Falcon mode but
* doesn't set st_shift. st_shift!=0 (!=4planes) is impossible
* with Falcon palette.
*/
videl.st_shift = 0;
/* now back to Falcon palette mode */
videl.f_shift = hw->f_shift;
}
/* writing to st_shift changed scn_width and vid_mode */
videl.xoffset = hw->xoffset;
shifter_f030.scn_width = hw->line_width;
shifter_f030.off_next = hw->line_offset;
videl.control = hw->vid_control;
videl.mode = hw->vid_mode;
}
if (f_pan_display) {
f_pan_display = 0;
videl.xoffset = current_par.hw.falcon.xoffset;
shifter_f030.off_next = current_par.hw.falcon.line_offset;
}
return IRQ_HANDLED;
}
static int falcon_pan_display( struct fb_var_screeninfo *var,
struct atafb_par *par )
{
int xoffset;
int bpp = fb_display[fb_info.currcon].var.bits_per_pixel;
if (bpp == 1)
var->xoffset = up(var->xoffset, 32);
if (bpp != 16)
par->hw.falcon.xoffset = var->xoffset & 15;
else {
par->hw.falcon.xoffset = 0;
var->xoffset = up(var->xoffset, 2);
}
par->hw.falcon.line_offset = bpp *
(fb_display[fb_info.currcon].var.xres_virtual - fb_display[fb_info.currcon].var.xres) / 16;
if (par->hw.falcon.xoffset)
par->hw.falcon.line_offset -= bpp;
xoffset = var->xoffset - par->hw.falcon.xoffset;
par->screen_base = screen_base +
(var->yoffset * fb_display[fb_info.currcon].var.xres_virtual + xoffset) * bpp / 8;
if (fbhw->set_screen_base)
fbhw->set_screen_base (par->screen_base);
else
return -EINVAL; /* shouldn't happen */
f_pan_display = 1;
return 0;
}
static int falcon_getcolreg( unsigned regno, unsigned *red,
unsigned *green, unsigned *blue,
unsigned *transp, struct fb_info *info )
{ unsigned long col;
if (regno > 255)
return 1;
/* This works in STE-mode (with 4bit/color) since f030_col-registers
* hold up to 6bit/color.
* Even with hicolor r/g/b=5/6/5 bit!
*/
col = f030_col[regno];
*red = (col >> 16) & 0xff00;
*green = (col >> 8) & 0xff00;
*blue = (col << 8) & 0xff00;
*transp = 0;
return 0;
}
static int falcon_setcolreg( unsigned regno, unsigned red,
unsigned green, unsigned blue,
unsigned transp, struct fb_info *info )
{
if (regno > 255)
return 1;
f030_col[regno] = (((red & 0xfc00) << 16) |
((green & 0xfc00) << 8) |
((blue & 0xfc00) >> 8));
if (regno < 16) {
shifter_tt.color_reg[regno] =
(((red & 0xe000) >> 13) | ((red & 0x1000) >> 12) << 8) |
(((green & 0xe000) >> 13) | ((green & 0x1000) >> 12) << 4) |
((blue & 0xe000) >> 13) | ((blue & 0x1000) >> 12);
#ifdef FBCON_HAS_CFB16
fbcon_cfb16_cmap[regno] = ((red & 0xf800) |
((green & 0xfc00) >> 5) |
((blue & 0xf800) >> 11));
#endif
}
return 0;
}
static int falcon_blank( int blank_mode )
{
/* ++guenther: we can switch off graphics by changing VDB and VDE,
* so VIDEL doesn't hog the bus while saving.
* (this may affect usleep()).
*/
int vdb, vss, hbe, hss;
if (mon_type == F_MON_SM) /* this doesn't work on SM124 */
return 1;
vdb = current_par.VDB;
vss = current_par.VSS;
hbe = current_par.HBE;
hss = current_par.HSS;
if (blank_mode >= 1) {
/* disable graphics output (this speeds up the CPU) ... */
vdb = current_par.VFT + 1;
/* ... and blank all lines */
hbe = current_par.HHT + 2;
}
/* use VESA suspend modes on VGA monitors */
if (mon_type == F_MON_VGA) {
if (blank_mode == 2 || blank_mode == 4)
vss = current_par.VFT + 1;
if (blank_mode == 3 || blank_mode == 4)
hss = current_par.HHT + 2;
}
videl.vdb = vdb;
videl.vss = vss;
videl.hbe = hbe;
videl.hss = hss;
return 0;
}
static int falcon_detect( void )
{
struct atafb_par par;
unsigned char fhw;
/* Determine connected monitor and set monitor parameters */
fhw = *(unsigned char*)0xffff8006;
mon_type = fhw >> 6 & 0x3;
/* bit 1 of fhw: 1=32 bit ram bus, 0=16 bit */
f030_bus_width = fhw << 6 & 0x80;
switch (mon_type) {
case F_MON_SM:
fb_info.monspecs.vfmin = 70;
fb_info.monspecs.vfmax = 72;
fb_info.monspecs.hfmin = 35713;
fb_info.monspecs.hfmax = 35715;
break;
case F_MON_SC:
case F_MON_TV:
/* PAL...NTSC */
fb_info.monspecs.vfmin = 49; /* not 50, since TOS defaults to 49.9x Hz */
fb_info.monspecs.vfmax = 60;
fb_info.monspecs.hfmin = 15620;
fb_info.monspecs.hfmax = 15755;
break;
}
/* initialize hsync-len */
f25.hsync = h_syncs[mon_type] / f25.t;
f32.hsync = h_syncs[mon_type] / f32.t;
if (fext.t)
fext.hsync = h_syncs[mon_type] / fext.t;
falcon_get_par(&par);
falcon_encode_var(&atafb_predefined[0], &par);
/* Detected mode is always the "autodetect" slot */
return 1;
}
#endif /* ATAFB_FALCON */
/* ------------------- ST(E) specific functions ---------------------- */
#ifdef ATAFB_STE
static int stste_encode_fix( struct fb_fix_screeninfo *fix,
struct atafb_par *par )
{
int mode;
strcpy(fix->id,"Atari Builtin");
fix->smem_start = (unsigned long)real_screen_base;
fix->smem_len = screen_len;
fix->type = FB_TYPE_INTERLEAVED_PLANES;
fix->type_aux = 2;
fix->visual = FB_VISUAL_PSEUDOCOLOR;
mode = par->hw.st.mode & 3;
if (mode == ST_HIGH) {
fix->type = FB_TYPE_PACKED_PIXELS;
fix->type_aux = 0;
fix->visual = FB_VISUAL_MONO10;
}
if (ATARIHW_PRESENT(EXTD_SHIFTER)) {
fix->xpanstep = 16;
fix->ypanstep = 1;
} else {
fix->xpanstep = 0;
fix->ypanstep = 0;
}
fix->ywrapstep = 0;
fix->line_length = 0;
fix->accel = FB_ACCEL_ATARIBLITT;
return 0;
}
static int stste_decode_var( struct fb_var_screeninfo *var,
struct atafb_par *par )
{
int xres=var->xres;
int yres=var->yres;
int bpp=var->bits_per_pixel;
int linelen;
int yres_virtual = var->yres_virtual;
if (mono_moni) {
if (bpp > 1 || xres > sttt_xres || yres > st_yres)
return -EINVAL;
par->hw.st.mode=ST_HIGH;
xres=sttt_xres;
yres=st_yres;
bpp=1;
} else {
if (bpp > 4 || xres > sttt_xres || yres > st_yres)
return -EINVAL;
if (bpp > 2) {
if (xres > sttt_xres/2 || yres > st_yres/2)
return -EINVAL;
par->hw.st.mode=ST_LOW;
xres=sttt_xres/2;
yres=st_yres/2;
bpp=4;
}
else if (bpp > 1) {
if (xres > sttt_xres || yres > st_yres/2)
return -EINVAL;
par->hw.st.mode=ST_MID;
xres=sttt_xres;
yres=st_yres/2;
bpp=2;
}
else
return -EINVAL;
}
if (yres_virtual <= 0)
yres_virtual = 0;
else if (yres_virtual < yres)
yres_virtual = yres;
if (var->sync & FB_SYNC_EXT)
par->hw.st.sync=(par->hw.st.sync & ~1) | 1;
else
par->hw.st.sync=(par->hw.st.sync & ~1);
linelen=xres*bpp/8;
if (yres_virtual * linelen > screen_len && screen_len)
return -EINVAL;
if (yres * linelen > screen_len && screen_len)
return -EINVAL;
if (var->yoffset + yres > yres_virtual && yres_virtual)
return -EINVAL;
par->yres_virtual = yres_virtual;
par->screen_base=screen_base+ var->yoffset*linelen;
return 0;
}
static int stste_encode_var( struct fb_var_screeninfo *var,
struct atafb_par *par )
{
int linelen;
memset(var, 0, sizeof(struct fb_var_screeninfo));
var->red.offset=0;
var->red.length = ATARIHW_PRESENT(EXTD_SHIFTER) ? 4 : 3;
var->red.msb_right=0;
var->grayscale=0;
var->pixclock=31041;
var->left_margin=120; /* these are incorrect */
var->right_margin=100;
var->upper_margin=8;
var->lower_margin=16;
var->hsync_len=140;
var->vsync_len=30;
var->height=-1;
var->width=-1;
if (!(par->hw.st.sync & 1))
var->sync=0;
else
var->sync=FB_SYNC_EXT;
switch (par->hw.st.mode & 3) {
case ST_LOW:
var->xres=sttt_xres/2;
var->yres=st_yres/2;
var->bits_per_pixel=4;
break;
case ST_MID:
var->xres=sttt_xres;
var->yres=st_yres/2;
var->bits_per_pixel=2;
break;
case ST_HIGH:
var->xres=sttt_xres;
var->yres=st_yres;
var->bits_per_pixel=1;
break;
}
var->blue=var->green=var->red;
var->transp.offset=0;
var->transp.length=0;
var->transp.msb_right=0;
var->xres_virtual=sttt_xres_virtual;
linelen=var->xres_virtual * var->bits_per_pixel / 8;
ovsc_addlen=linelen*(sttt_yres_virtual - st_yres);
if (! use_hwscroll)
var->yres_virtual=var->yres;
else if (screen_len) {
if (par->yres_virtual)
var->yres_virtual = par->yres_virtual;
else
/* yres_virtual==0 means use maximum */
var->yres_virtual = screen_len / linelen;
}
else {
if (hwscroll < 0)
var->yres_virtual = 2 * var->yres;
else
var->yres_virtual=var->yres+hwscroll * 16;
}
var->xoffset=0;
if (screen_base)
var->yoffset=(par->screen_base - screen_base)/linelen;
else
var->yoffset=0;
var->nonstd=0;
var->activate=0;
var->vmode=FB_VMODE_NONINTERLACED;
return 0;
}
static void stste_get_par( struct atafb_par *par )
{
unsigned long addr;
par->hw.st.mode=shifter_tt.st_shiftmode;
par->hw.st.sync=shifter.syncmode;
addr = ((shifter.bas_hi & 0xff) << 16) |
((shifter.bas_md & 0xff) << 8);
if (ATARIHW_PRESENT(EXTD_SHIFTER))
addr |= (shifter.bas_lo & 0xff);
par->screen_base = phys_to_virt(addr);
}
static void stste_set_par( struct atafb_par *par )
{
shifter_tt.st_shiftmode=par->hw.st.mode;
shifter.syncmode=par->hw.st.sync;
/* only set screen_base if really necessary */
if (current_par.screen_base != par->screen_base)
fbhw->set_screen_base(par->screen_base);
}
static int stste_getcolreg(unsigned regno, unsigned *red,
unsigned *green, unsigned *blue,
unsigned *transp, struct fb_info *info)
{
unsigned col, t;
if (regno > 15)
return 1;
col = shifter_tt.color_reg[regno];
if (ATARIHW_PRESENT(EXTD_SHIFTER)) {
t = ((col >> 7) & 0xe) | ((col >> 11) & 1);
t |= t << 4;
*red = t | (t << 8);
t = ((col >> 3) & 0xe) | ((col >> 7) & 1);
t |= t << 4;
*green = t | (t << 8);
t = ((col << 1) & 0xe) | ((col >> 3) & 1);
t |= t << 4;
*blue = t | (t << 8);
}
else {
t = (col >> 7) & 0xe;
t |= t << 4;
*red = t | (t << 8);
t = (col >> 3) & 0xe;
t |= t << 4;
*green = t | (t << 8);
t = (col << 1) & 0xe;
t |= t << 4;
*blue = t | (t << 8);
}
*transp = 0;
return 0;
}
static int stste_setcolreg(unsigned regno, unsigned red,
unsigned green, unsigned blue,
unsigned transp, struct fb_info *info)
{
if (regno > 15)
return 1;
red >>= 12;
blue >>= 12;
green >>= 12;
if (ATARIHW_PRESENT(EXTD_SHIFTER))
shifter_tt.color_reg[regno] =
(((red & 0xe) >> 1) | ((red & 1) << 3) << 8) |
(((green & 0xe) >> 1) | ((green & 1) << 3) << 4) |
((blue & 0xe) >> 1) | ((blue & 1) << 3);
else
shifter_tt.color_reg[regno] =
((red & 0xe) << 7) |
((green & 0xe) << 3) |
((blue & 0xe) >> 1);
return 0;
}
static int stste_detect( void )
{ struct atafb_par par;
/* Determine the connected monitor: The DMA sound must be
* disabled before reading the MFP GPIP, because the Sound
* Done Signal and the Monochrome Detect are XORed together!
*/
if (ATARIHW_PRESENT(PCM_8BIT)) {
tt_dmasnd.ctrl = DMASND_CTRL_OFF;
udelay(20); /* wait a while for things to settle down */
}
mono_moni = (mfp.par_dt_reg & 0x80) == 0;
stste_get_par(&par);
stste_encode_var(&atafb_predefined[0], &par);
if (!ATARIHW_PRESENT(EXTD_SHIFTER))
use_hwscroll = 0;
return 1;
}
static void stste_set_screen_base(void *s_base)
{
unsigned long addr;
addr= virt_to_phys(s_base);
/* Setup Screen Memory */
shifter.bas_hi=(unsigned char) ((addr & 0xff0000) >> 16);
shifter.bas_md=(unsigned char) ((addr & 0x00ff00) >> 8);
if (ATARIHW_PRESENT(EXTD_SHIFTER))
shifter.bas_lo=(unsigned char) (addr & 0x0000ff);
}
#endif /* ATAFB_STE */
/* Switching the screen size should be done during vsync, otherwise
* the margins may get messed up. This is a well known problem of
* the ST's video system.
*
* Unfortunately there is hardly any way to find the vsync, as the
* vertical blank interrupt is no longer in time on machines with
* overscan type modifications.
*
* We can, however, use Timer B to safely detect the black shoulder,
* but then we've got to guess an appropriate delay to find the vsync.
* This might not work on every machine.
*
* martin_rogge @ ki.maus.de, 8th Aug 1995
*/
#define LINE_DELAY (mono_moni ? 30 : 70)
#define SYNC_DELAY (mono_moni ? 1500 : 2000)
/* SWITCH_ACIA may be used for Falcon (ScreenBlaster III internal!) */
static void st_ovsc_switch(void)
{
unsigned long flags;
register unsigned char old, new;
if (!(atari_switches & ATARI_SWITCH_OVSC_MASK))
return;
local_irq_save(flags);
mfp.tim_ct_b = 0x10;
mfp.active_edge |= 8;
mfp.tim_ct_b = 0;
mfp.tim_dt_b = 0xf0;
mfp.tim_ct_b = 8;
while (mfp.tim_dt_b > 1) /* TOS does it this way, don't ask why */
;
new = mfp.tim_dt_b;
do {
udelay(LINE_DELAY);
old = new;
new = mfp.tim_dt_b;
} while (old != new);
mfp.tim_ct_b = 0x10;
udelay(SYNC_DELAY);
if (atari_switches & ATARI_SWITCH_OVSC_IKBD)
acia.key_ctrl = ACIA_DIV64 | ACIA_D8N1S | ACIA_RHTID | ACIA_RIE;
if (atari_switches & ATARI_SWITCH_OVSC_MIDI)
acia.mid_ctrl = ACIA_DIV16 | ACIA_D8N1S | ACIA_RHTID;
if (atari_switches & (ATARI_SWITCH_OVSC_SND6|ATARI_SWITCH_OVSC_SND7)) {
sound_ym.rd_data_reg_sel = 14;
sound_ym.wd_data = sound_ym.rd_data_reg_sel |
((atari_switches&ATARI_SWITCH_OVSC_SND6) ? 0x40:0) |
((atari_switches&ATARI_SWITCH_OVSC_SND7) ? 0x80:0);
}
local_irq_restore(flags);
}
/* ------------------- External Video ---------------------- */
#ifdef ATAFB_EXT
static int ext_encode_fix( struct fb_fix_screeninfo *fix,
struct atafb_par *par )
{
strcpy(fix->id,"Unknown Extern");
fix->smem_start = (unsigned long)external_addr;
fix->smem_len = PAGE_ALIGN(external_len);
if (external_depth == 1) {
fix->type = FB_TYPE_PACKED_PIXELS;
/* The letters 'n' and 'i' in the "atavideo=external:" stand
* for "normal" and "inverted", rsp., in the monochrome case */
fix->visual =
(external_pmode == FB_TYPE_INTERLEAVED_PLANES ||
external_pmode == FB_TYPE_PACKED_PIXELS) ?
FB_VISUAL_MONO10 :
FB_VISUAL_MONO01;
}
else {
/* Use STATIC if we don't know how to access color registers */
int visual = external_vgaiobase ?
FB_VISUAL_PSEUDOCOLOR :
FB_VISUAL_STATIC_PSEUDOCOLOR;
switch (external_pmode) {
case -1: /* truecolor */
fix->type=FB_TYPE_PACKED_PIXELS;
fix->visual=FB_VISUAL_TRUECOLOR;
break;
case FB_TYPE_PACKED_PIXELS:
fix->type=FB_TYPE_PACKED_PIXELS;
fix->visual=visual;
break;
case FB_TYPE_PLANES:
fix->type=FB_TYPE_PLANES;
fix->visual=visual;
break;
case FB_TYPE_INTERLEAVED_PLANES:
fix->type=FB_TYPE_INTERLEAVED_PLANES;
fix->type_aux=2;
fix->visual=visual;
break;
}
}
fix->xpanstep = 0;
fix->ypanstep = 0;
fix->ywrapstep = 0;
fix->line_length = 0;
return 0;
}
static int ext_decode_var( struct fb_var_screeninfo *var,
struct atafb_par *par )
{
struct fb_var_screeninfo *myvar = &atafb_predefined[0];
if (var->bits_per_pixel > myvar->bits_per_pixel ||
var->xres > myvar->xres ||
var->xres_virtual > myvar->xres_virtual ||
var->yres > myvar->yres ||
var->xoffset > 0 ||
var->yoffset > 0)
return -EINVAL;
return 0;
}
static int ext_encode_var( struct fb_var_screeninfo *var,
struct atafb_par *par )
{
memset(var, 0, sizeof(struct fb_var_screeninfo));
var->red.offset=0;
var->red.length=(external_pmode == -1) ? external_depth/3 :
(external_vgaiobase ? external_bitspercol : 0);
var->red.msb_right=0;
var->grayscale=0;
var->pixclock=31041;
var->left_margin=120; /* these are surely incorrect */
var->right_margin=100;
var->upper_margin=8;
var->lower_margin=16;
var->hsync_len=140;
var->vsync_len=30;
var->height=-1;
var->width=-1;
var->sync=0;
var->xres = external_xres;
var->yres = external_yres;
var->xres_virtual = external_xres_virtual;
var->bits_per_pixel = external_depth;
var->blue=var->green=var->red;
var->transp.offset=0;
var->transp.length=0;
var->transp.msb_right=0;
var->yres_virtual=var->yres;
var->xoffset=0;
var->yoffset=0;
var->nonstd=0;
var->activate=0;
var->vmode=FB_VMODE_NONINTERLACED;
return 0;
}
static void ext_get_par( struct atafb_par *par )
{
par->screen_base = external_addr;
}
static void ext_set_par( struct atafb_par *par )
{
}
#define OUTB(port,val) \
*((unsigned volatile char *) ((port)+external_vgaiobase))=(val)
#define INB(port) \
(*((unsigned volatile char *) ((port)+external_vgaiobase)))
#define DACDelay \
do { \
unsigned char tmp=INB(0x3da); \
tmp=INB(0x3da); \
} while (0)
static int ext_getcolreg( unsigned regno, unsigned *red,
unsigned *green, unsigned *blue,
unsigned *transp, struct fb_info *info )
{
if (! external_vgaiobase)
return 1;
*red = ext_color[regno].red;
*green = ext_color[regno].green;
*blue = ext_color[regno].blue;
*transp=0;
return 0;
}
static int ext_setcolreg( unsigned regno, unsigned red,
unsigned green, unsigned blue,
unsigned transp, struct fb_info *info )
{ unsigned char colmask = (1 << external_bitspercol) - 1;
if (! external_vgaiobase)
return 1;
ext_color[regno].red = red;
ext_color[regno].green = green;
ext_color[regno].blue = blue;
switch (external_card_type) {
case IS_VGA:
OUTB(0x3c8, regno);
DACDelay;
OUTB(0x3c9, red & colmask);
DACDelay;
OUTB(0x3c9, green & colmask);
DACDelay;
OUTB(0x3c9, blue & colmask);
DACDelay;
return 0;
case IS_MV300:
OUTB((MV300_reg[regno] << 2)+1, red);
OUTB((MV300_reg[regno] << 2)+1, green);
OUTB((MV300_reg[regno] << 2)+1, blue);
return 0;
default:
return 1;
}
}
static int ext_detect( void )
{
struct fb_var_screeninfo *myvar = &atafb_predefined[0];
struct atafb_par dummy_par;
myvar->xres = external_xres;
myvar->xres_virtual = external_xres_virtual;
myvar->yres = external_yres;
myvar->bits_per_pixel = external_depth;
ext_encode_var(myvar, &dummy_par);
return 1;
}
#endif /* ATAFB_EXT */
/* ------ This is the same for most hardware types -------- */
static void set_screen_base(void *s_base)
{
unsigned long addr;
addr= virt_to_phys(s_base);
/* Setup Screen Memory */
shifter.bas_hi=(unsigned char) ((addr & 0xff0000) >> 16);
shifter.bas_md=(unsigned char) ((addr & 0x00ff00) >> 8);
shifter.bas_lo=(unsigned char) (addr & 0x0000ff);
}
static int pan_display( struct fb_var_screeninfo *var,
struct atafb_par *par )
{
if (!fbhw->set_screen_base ||
(!ATARIHW_PRESENT(EXTD_SHIFTER) && var->xoffset))
return -EINVAL;
var->xoffset = up(var->xoffset, 16);
par->screen_base = screen_base +
(var->yoffset * fb_display[fb_info.currcon].var.xres_virtual + var->xoffset)
* fb_display[fb_info.currcon].var.bits_per_pixel / 8;
fbhw->set_screen_base (par->screen_base);
return 0;
}
/* ------------ Interfaces to hardware functions ------------ */
#ifdef ATAFB_TT
static struct fb_hwswitch tt_switch = {
tt_detect, tt_encode_fix, tt_decode_var, tt_encode_var,
tt_get_par, tt_set_par, tt_getcolreg,
set_screen_base, NULL, pan_display
};
#endif
#ifdef ATAFB_FALCON
static struct fb_hwswitch falcon_switch = {
falcon_detect, falcon_encode_fix, falcon_decode_var, falcon_encode_var,
falcon_get_par, falcon_set_par, falcon_getcolreg,
set_screen_base, falcon_blank, falcon_pan_display
};
#endif
#ifdef ATAFB_STE
static struct fb_hwswitch st_switch = {
stste_detect, stste_encode_fix, stste_decode_var, stste_encode_var,
stste_get_par, stste_set_par, stste_getcolreg,
stste_set_screen_base, NULL, pan_display
};
#endif
#ifdef ATAFB_EXT
static struct fb_hwswitch ext_switch = {
ext_detect, ext_encode_fix, ext_decode_var, ext_encode_var,
ext_get_par, ext_set_par, ext_getcolreg, NULL, NULL, NULL
};
#endif
static void atafb_get_par( struct atafb_par *par )
{
if (current_par_valid) {
*par=current_par;
}
else
fbhw->get_par(par);
}
static void atafb_set_par( struct atafb_par *par )
{
fbhw->set_par(par);
current_par=*par;
current_par_valid=1;
}
/* =========================================================== */
/* ============== Hardware Independent Functions ============= */
/* =========================================================== */
/* used for hardware scrolling */
static int
fb_update_var(int con, struct fb_info *info)
{
int off=fb_display[con].var.yoffset*fb_display[con].var.xres_virtual*
fb_display[con].var.bits_per_pixel>>3;
current_par.screen_base=screen_base + off;
if (fbhw->set_screen_base)
fbhw->set_screen_base(current_par.screen_base);
return 0;
}
static int
do_fb_set_var(struct fb_var_screeninfo *var, int isactive)
{
int err,activate;
struct atafb_par par;
if ((err=fbhw->decode_var(var, &par)))
return err;
activate=var->activate;
if (((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) && isactive)
atafb_set_par(&par);
fbhw->encode_var(var, &par);
var->activate=activate;
return 0;
}
static int
atafb_get_fix(struct fb_fix_screeninfo *fix, int con, struct fb_info *info)
{
struct atafb_par par;
if (con == -1)
atafb_get_par(&par);
else {
int err;
if ((err=fbhw->decode_var(&fb_display[con].var,&par)))
return err;
}
memset(fix, 0, sizeof(struct fb_fix_screeninfo));
return fbhw->encode_fix(fix, &par);
}
static int
atafb_get_var(struct fb_var_screeninfo *var, int con, struct fb_info *info)
{
struct atafb_par par;
if (con == -1) {
atafb_get_par(&par);
fbhw->encode_var(var, &par);
}
else
*var=fb_display[con].var;
return 0;
}
static void
atafb_set_disp(int con, struct fb_info *info)
{
struct fb_fix_screeninfo fix;
struct fb_var_screeninfo var;
struct display *display;
if (con >= 0)
display = &fb_display[con];
else
display = &disp; /* used during initialization */
atafb_get_fix(&fix, con, info);
atafb_get_var(&var, con, info);
if (con == -1)
con=0;
info->screen_base = (void *)fix.smem_start;
display->visual = fix.visual;
display->type = fix.type;
display->type_aux = fix.type_aux;
display->ypanstep = fix.ypanstep;
display->ywrapstep = fix.ywrapstep;
display->line_length = fix.line_length;
if (fix.visual != FB_VISUAL_PSEUDOCOLOR &&
fix.visual != FB_VISUAL_DIRECTCOLOR)
display->can_soft_blank = 0;
else
display->can_soft_blank = 1;
display->inverse =
(fix.visual == FB_VISUAL_MONO01 ? !inverse : inverse);
switch (fix.type) {
case FB_TYPE_INTERLEAVED_PLANES:
switch (var.bits_per_pixel) {
#ifdef FBCON_HAS_IPLAN2P2
case 2:
display->dispsw = &fbcon_iplan2p2;
break;
#endif
#ifdef FBCON_HAS_IPLAN2P4
case 4:
display->dispsw = &fbcon_iplan2p4;
break;
#endif
#ifdef FBCON_HAS_IPLAN2P8
case 8:
display->dispsw = &fbcon_iplan2p8;
break;
#endif
}
break;
case FB_TYPE_PACKED_PIXELS:
switch (var.bits_per_pixel) {
#ifdef FBCON_HAS_MFB
case 1:
display->dispsw = &fbcon_mfb;
break;
#endif
#ifdef FBCON_HAS_CFB8
case 8:
display->dispsw = &fbcon_cfb8;
break;
#endif
#ifdef FBCON_HAS_CFB16
case 16:
display->dispsw = &fbcon_cfb16;
display->dispsw_data = fbcon_cfb16_cmap;
break;
#endif
}
break;
}
}
static int
atafb_set_var(struct fb_var_screeninfo *var, int con, struct fb_info *info)
{
int err,oldxres,oldyres,oldbpp,oldxres_virtual,
oldyres_virtual,oldyoffset;
if ((err=do_fb_set_var(var, con==info->currcon)))
return err;
if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
oldxres=fb_display[con].var.xres;
oldyres=fb_display[con].var.yres;
oldxres_virtual=fb_display[con].var.xres_virtual;
oldyres_virtual=fb_display[con].var.yres_virtual;
oldbpp=fb_display[con].var.bits_per_pixel;
oldyoffset=fb_display[con].var.yoffset;
fb_display[con].var=*var;
if (oldxres != var->xres || oldyres != var->yres
|| oldxres_virtual != var->xres_virtual
|| oldyres_virtual != var->yres_virtual
|| oldbpp != var->bits_per_pixel
|| oldyoffset != var->yoffset) {
atafb_set_disp(con, info);
(*fb_info.changevar)(con);
fb_alloc_cmap(&fb_display[con].cmap, 0, 0);
do_install_cmap(con, info);
}
}
var->activate=0;
return 0;
}
static int
atafb_get_cmap(struct fb_cmap *cmap, int kspc, int con, struct fb_info *info)
{
if (con == info->currcon) /* current console ? */
return fb_get_cmap(cmap, kspc, fbhw->getcolreg, info);
else
if (fb_display[con].cmap.len) /* non default colormap ? */
fb_copy_cmap(&fb_display[con].cmap, cmap, kspc ? 0 : 2);
else
fb_copy_cmap(fb_default_cmap(1<<fb_display[con].var.bits_per_pixel),
cmap, kspc ? 0 : 2);
return 0;
}
static int
atafb_pan_display(struct fb_var_screeninfo *var, int con, struct fb_info *info)
{
int xoffset = var->xoffset;
int yoffset = var->yoffset;
int err;
if ( xoffset < 0 || xoffset + fb_display[con].var.xres > fb_display[con].var.xres_virtual
|| yoffset < 0 || yoffset + fb_display[con].var.yres > fb_display[con].var.yres_virtual)
return -EINVAL;
if (con == info->currcon) {
if (fbhw->pan_display) {
if ((err = fbhw->pan_display(var, &current_par)))
return err;
}
else
return -EINVAL;
}
fb_display[con].var.xoffset = var->xoffset;
fb_display[con].var.yoffset = var->yoffset;
return 0;
}
static int
atafb_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
unsigned long arg, int con, struct fb_info *info)
{
switch (cmd) {
#ifdef FBCMD_GET_CURRENTPAR
case FBCMD_GET_CURRENTPAR:
if (copy_to_user((void *)arg, (void *)&current_par,
sizeof(struct atafb_par)))
return -EFAULT;
return 0;
#endif
#ifdef FBCMD_SET_CURRENTPAR
case FBCMD_SET_CURRENTPAR:
if (copy_from_user((void *)&current_par, (void *)arg,
sizeof(struct atafb_par)))
return -EFAULT;
atafb_set_par(&current_par);
return 0;
#endif
}
return -EINVAL;
}
/* (un)blank/poweroff
* 0 = unblank
* 1 = blank
* 2 = suspend vsync
* 3 = suspend hsync
* 4 = off
*/
static int
atafb_blank(int blank, struct fb_info *info)
{
unsigned short black[16];
struct fb_cmap cmap;
if (fbhw->blank && !fbhw->blank(blank))
return 1;
if (blank) {
memset(black, 0, 16*sizeof(unsigned short));
cmap.red=black;
cmap.green=black;
cmap.blue=black;
cmap.transp=NULL;
cmap.start=0;
cmap.len=16;
fb_set_cmap(&cmap, 1, info);
}
else
do_install_cmap(info->currcon, info);
return 0;
}
static struct fb_ops atafb_ops = {
.owner = THIS_MODULE,
.fb_get_fix = atafb_get_fix,
.fb_get_var = atafb_get_var,
.fb_set_var = atafb_set_var,
.fb_get_cmap = atafb_get_cmap,
.fb_set_cmap = gen_set_cmap,
.fb_pan_display =atafb_pan_display,
.fb_blank = atafb_blank,
.fb_ioctl = atafb_ioctl,
};
static void
check_default_par( int detected_mode )
{
char default_name[10];
int i;
struct fb_var_screeninfo var;
unsigned long min_mem;
/* First try the user supplied mode */
if (default_par) {
var=atafb_predefined[default_par-1];
var.activate = FB_ACTIVATE_TEST;
if (do_fb_set_var(&var,1))
default_par=0; /* failed */
}
/* Next is the autodetected one */
if (! default_par) {
var=atafb_predefined[detected_mode-1]; /* autodetect */
var.activate = FB_ACTIVATE_TEST;
if (!do_fb_set_var(&var,1))
default_par=detected_mode;
}
/* If that also failed, try some default modes... */
if (! default_par) {
/* try default1, default2... */
for (i=1 ; i < 10 ; i++) {
sprintf(default_name,"default%d",i);
default_par=get_video_mode(default_name);
if (! default_par)
panic("can't set default video mode");
var=atafb_predefined[default_par-1];
var.activate = FB_ACTIVATE_TEST;
if (! do_fb_set_var(&var,1))
break; /* ok */
}
}
min_mem=var.xres_virtual * var.yres_virtual * var.bits_per_pixel/8;
if (default_mem_req < min_mem)
default_mem_req=min_mem;
}
static int
atafb_switch(int con, struct fb_info *info)
{
/* Do we have to save the colormap ? */
if (fb_display[info->currcon].cmap.len)
fb_get_cmap(&fb_display[info->currcon].cmap, 1, fbhw->getcolreg,
info);
do_fb_set_var(&fb_display[con].var,1);
info->currcon=con;
/* Install new colormap */
do_install_cmap(con, info);
return 0;
}
int __init atafb_init(void)
{
int pad;
int detected_mode;
unsigned long mem_req;
if (!MACH_IS_ATARI)
return -ENXIO;
do {
#ifdef ATAFB_EXT
if (external_addr) {
fbhw = &ext_switch;
atafb_ops.fb_setcolreg = &ext_setcolreg;
break;
}
#endif
#ifdef ATAFB_TT
if (ATARIHW_PRESENT(TT_SHIFTER)) {
fbhw = &tt_switch;
atafb_ops.fb_setcolreg = &tt_setcolreg;
break;
}
#endif
#ifdef ATAFB_FALCON
if (ATARIHW_PRESENT(VIDEL_SHIFTER)) {
fbhw = &falcon_switch;
atafb_ops.fb_setcolreg = &falcon_setcolreg;
request_irq(IRQ_AUTO_4, falcon_vbl_switcher, IRQ_TYPE_PRIO,
"framebuffer/modeswitch", falcon_vbl_switcher);
break;
}
#endif
#ifdef ATAFB_STE
if (ATARIHW_PRESENT(STND_SHIFTER) ||
ATARIHW_PRESENT(EXTD_SHIFTER)) {
fbhw = &st_switch;
atafb_ops.fb_setcolreg = &stste_setcolreg;
break;
}
fbhw = &st_switch;
atafb_ops.fb_setcolreg = &stste_setcolreg;
printk("Cannot determine video hardware; defaulting to ST(e)\n");
#else /* ATAFB_STE */
/* no default driver included */
/* Nobody will ever see this message :-) */
panic("Cannot initialize video hardware");
#endif
} while (0);
/* Multisync monitor capabilities */
/* Atari-TOS defaults if no boot option present */
if (fb_info.monspecs.hfmin == 0) {
fb_info.monspecs.hfmin = 31000;
fb_info.monspecs.hfmax = 32000;
fb_info.monspecs.vfmin = 58;
fb_info.monspecs.vfmax = 62;
}
detected_mode = fbhw->