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linux/drivers/video/atafb.c
David Howells 7d12e780e0 IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.

The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around.  On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).

Where appropriate, an arch may override the generic storage facility and do
something different with the variable.  On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.

Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions.  Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller.  A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.

I've build this code with allyesconfig for x86_64 and i386.  I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.

This will affect all archs.  Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:

	struct pt_regs *old_regs = set_irq_regs(regs);

And put the old one back at the end:

	set_irq_regs(old_regs);

Don't pass regs through to generic_handle_irq() or __do_IRQ().

In timer_interrupt(), this sort of change will be necessary:

	-	update_process_times(user_mode(regs));
	-	profile_tick(CPU_PROFILING, regs);
	+	update_process_times(user_mode(get_irq_regs()));
	+	profile_tick(CPU_PROFILING);

I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().

Some notes on the interrupt handling in the drivers:

 (*) input_dev() is now gone entirely.  The regs pointer is no longer stored in
     the input_dev struct.

 (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking.  It does
     something different depending on whether it's been supplied with a regs
     pointer or not.

 (*) Various IRQ handler function pointers have been moved to type
     irq_handler_t.

Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 15:10:12 +01:00

3097 lines
82 KiB
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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/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 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 fb_info *info, unsigned int cmd, unsigned long arg)
{
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->detect();
check_default_par(detected_mode);
#ifdef ATAFB_EXT
if (!external_addr) {
#endif /* ATAFB_EXT */
mem_req = default_mem_req + ovsc_offset + ovsc_addlen;
mem_req = PAGE_ALIGN(mem_req) + PAGE_SIZE;
screen_base = atari_stram_alloc(mem_req, "atafb");
if (!screen_base)
panic("Cannot allocate screen memory");
memset(screen_base, 0, mem_req);
pad = -(unsigned long)screen_base & (PAGE_SIZE-1);
screen_base+=pad;
real_screen_base=screen_base+ovsc_offset;
screen_len = (mem_req - pad - ovsc_offset) & PAGE_MASK;
st_ovsc_switch();
if (CPU_IS_040_OR_060) {
/* On a '040+, the cache mode of video RAM must be set to
* write-through also for internal video hardware! */
cache_push(virt_to_phys(screen_base), screen_len);
kernel_set_cachemode(screen_base, screen_len,
IOMAP_WRITETHROUGH);
}
#ifdef ATAFB_EXT
}
else {
/* Map the video memory (physical address given) to somewhere
* in the kernel address space.
*/
external_addr =
ioremap_writethrough((unsigned long)external_addr,
external_len);
if (external_vgaiobase)
external_vgaiobase =
(unsigned long)ioremap(external_vgaiobase, 0x10000);
screen_base =
real_screen_base = external_addr;
screen_len = external_len & PAGE_MASK;
memset (screen_base, 0, external_len);
}
#endif /* ATAFB_EXT */
strcpy(fb_info.modename, "Atari Builtin ");
fb_info.changevar = NULL;
fb_info.fbops = &atafb_ops;
fb_info.disp = &disp;
fb_info.currcon = -1;
fb_info.switch_con = &atafb_switch;
fb_info.updatevar = &fb_update_var;
fb_info.flags = FBINFO_FLAG_DEFAULT;
do_fb_set_var(&atafb_predefined[default_par-1], 1);
strcat(fb_info.modename, fb_var_names[default_par-1][0]);
atafb_get_var(&disp.var, -1, &fb_info);
atafb_set_disp(-1, &fb_info);
do_install_cmap(0, &fb_info);
if (register_framebuffer(&fb_info) < 0)
return -EINVAL;
printk("Determined %dx%d, depth %d\n",
disp.var.xres, disp.var.yres, disp.var.bits_per_pixel);
if ((disp.var.xres != disp.var.xres_virtual) ||
(disp.var.yres != disp.var.yres_virtual))
printk(" virtual %dx%d\n",
disp.var.xres_virtual, disp.var.yres_virtual);
printk("fb%d: %s frame buffer device, using %dK of video memory\n",
fb_info.node, fb_info.modename, screen_len>>10);
/* TODO: This driver cannot be unloaded yet */
return 0;
}
#ifdef ATAFB_EXT
static void __init atafb_setup_ext(char *spec)
{
int xres, xres_virtual, yres, depth, planes;
unsigned long addr, len;
char *p;
/* Format is: <xres>;<yres>;<depth>;<plane organ.>;
* <screen mem addr>
* [;<screen mem length>[;<vgaiobase>[;<bits-per-col>[;<colorreg-type>
* [;<xres-virtual>]]]]]
*
* 09/23/97 Juergen
* <xres_virtual>: hardware's x-resolution (f.e. ProMST)
*
* Even xres_virtual is available, we neither support panning nor hw-scrolling!
*/
if (!(p = strsep(&spec, ";")) || !*p)
return;
xres_virtual = xres = simple_strtoul(p, NULL, 10);
if (xres <= 0)
return;
if (!(p = strsep(&spec, ";")) || !*p)
return;
yres = simple_strtoul(p, NULL, 10);
if (yres <= 0)
return;
if (!(p = strsep(&spec, ";")) || !*p)
return;
depth = simple_strtoul(p, NULL, 10);
if (depth != 1 && depth != 2 && depth != 4 && depth != 8 &&
depth != 16 && depth != 24)
return;
if (!(p = strsep(&spec, ";")) || !*p)
return;
if (*p == 'i')
planes = FB_TYPE_INTERLEAVED_PLANES;
else if (*p == 'p')
planes = FB_TYPE_PACKED_PIXELS;
else if (*p == 'n')
planes = FB_TYPE_PLANES;
else if (*p == 't')
planes = -1; /* true color */
else
return;
if (!(p = strsep(&spec, ";")) || !*p)
return;
addr = simple_strtoul(p, NULL, 0);
if (!(p = strsep(&spec, ";")) || !*p)
len = xres*yres*depth/8;
else
len = simple_strtoul(p, NULL, 0);
if ((p = strsep(&spec, ";")) && *p) {
external_vgaiobase=simple_strtoul(p, NULL, 0);
}
if ((p = strsep(&spec, ";")) && *p) {
external_bitspercol = simple_strtoul(p, NULL, 0);
if (external_bitspercol > 8)
external_bitspercol = 8;
else if (external_bitspercol < 1)
external_bitspercol = 1;
}
if ((p = strsep(&spec, ";")) && *p) {
if (!strcmp(p, "vga"))
external_card_type = IS_VGA;
if (!strcmp(p, "mv300"))
external_card_type = IS_MV300;
}
if ((p = strsep(&spec, ";")) && *p) {
xres_virtual = simple_strtoul(p, NULL, 10);
if (xres_virtual < xres)
xres_virtual = xres;
if (xres_virtual*yres*depth/8 > len)
len=xres_virtual*yres*depth/8;
}
external_xres = xres;
external_xres_virtual = xres_virtual;
external_yres = yres;
external_depth = depth;
external_pmode = planes;
external_addr = (void *)addr;
external_len = len;
if (external_card_type == IS_MV300)
switch (external_depth) {
case 1:
MV300_reg = MV300_reg_1bit;
break;
case 4:
MV300_reg = MV300_reg_4bit;
break;
case 8:
MV300_reg = MV300_reg_8bit;
break;
}
}
#endif /* ATAFB_EXT */
static void __init atafb_setup_int(char *spec)
{
/* Format to config extended internal video hardware like OverScan:
"internal:<xres>;<yres>;<xres_max>;<yres_max>;<offset>"
Explanation:
<xres>: x-resolution
<yres>: y-resolution
The following are only needed if you have an overscan which
needs a black border:
<xres_max>: max. length of a line in pixels your OverScan hardware would allow
<yres_max>: max. number of lines your OverScan hardware would allow
<offset>: Offset from physical beginning to visible beginning
of screen in bytes
*/
int xres;
char *p;
if (!(p = strsep(&spec, ";")) || !*p)
return;
xres = simple_strtoul(p, NULL, 10);
if (!(p = strsep(&spec, ";")) || !*p)
return;
sttt_xres=xres;
tt_yres=st_yres=simple_strtoul(p, NULL, 10);
if ((p=strsep(&spec, ";")) && *p) {
sttt_xres_virtual=simple_strtoul(p, NULL, 10);
}
if ((p=strsep(&spec, ";")) && *p) {
sttt_yres_virtual=simple_strtoul(p, NULL, 0);
}
if ((p=strsep(&spec, ";")) && *p) {
ovsc_offset=simple_strtoul(p, NULL, 0);
}
if (ovsc_offset || (sttt_yres_virtual != st_yres))
use_hwscroll=0;
}
#ifdef ATAFB_FALCON
static void __init atafb_setup_mcap(char *spec)
{
char *p;
int vmin, vmax, hmin, hmax;
/* Format for monitor capabilities is: <Vmin>;<Vmax>;<Hmin>;<Hmax>
* <V*> vertical freq. in Hz
* <H*> horizontal freq. in kHz
*/
if (!(p = strsep(&spec, ";")) || !*p)
return;
vmin = simple_strtoul(p, NULL, 10);
if (vmin <= 0)
return;
if (!(p = strsep(&spec, ";")) || !*p)
return;
vmax = simple_strtoul(p, NULL, 10);
if (vmax <= 0 || vmax <= vmin)
return;
if (!(p = strsep(&spec, ";")) || !*p)
return;
hmin = 1000 * simple_strtoul(p, NULL, 10);
if (hmin <= 0)
return;
if (!(p = strsep(&spec, "")) || !*p)
return;
hmax = 1000 * simple_strtoul(p, NULL, 10);
if (hmax <= 0 || hmax <= hmin)
return;
fb_info.monspecs.vfmin = vmin;
fb_info.monspecs.vfmax = vmax;
fb_info.monspecs.hfmin = hmin;
fb_info.monspecs.hfmax = hmax;
}
#endif /* ATAFB_FALCON */
static void __init atafb_setup_user(char *spec)
{
/* Format of user defined video mode is: <xres>;<yres>;<depth>
*/
char *p;
int xres, yres, depth, temp;
if (!(p = strsep(&spec, ";")) || !*p)
return;
xres = simple_strtoul(p, NULL, 10);
if (!(p = strsep(&spec, ";")) || !*p)
return;
yres = simple_strtoul(p, NULL, 10);
if (!(p = strsep(&spec, "")) || !*p)
return;
depth = simple_strtoul(p, NULL, 10);
if ((temp=get_video_mode("user0"))) {
default_par=temp;
atafb_predefined[default_par-1].xres = xres;
atafb_predefined[default_par-1].yres = yres;
atafb_predefined[default_par-1].bits_per_pixel = depth;
}
}
int __init atafb_setup( char *options )
{
char *this_opt;
int temp;
fb_info.fontname[0] = '\0';
if (!options || !*options)
return 0;
while ((this_opt = strsep(&options, ",")) != NULL) {
if (!*this_opt) continue;
if ((temp=get_video_mode(this_opt)))
default_par=temp;
else if (! strcmp(this_opt, "inverse"))
inverse=1;
else if (!strncmp(this_opt, "font:", 5))
strcpy(fb_info.fontname, this_opt+5);
else if (! strncmp(this_opt, "hwscroll_",9)) {
hwscroll=simple_strtoul(this_opt+9, NULL, 10);
if (hwscroll < 0)
hwscroll = 0;
if (hwscroll > 200)
hwscroll = 200;
}
#ifdef ATAFB_EXT
else if (!strcmp(this_opt,"mv300")) {
external_bitspercol = 8;
external_card_type = IS_MV300;
}
else if (!strncmp(this_opt,"external:",9))
atafb_setup_ext(this_opt+9);
#endif
else if (!strncmp(this_opt,"internal:",9))
atafb_setup_int(this_opt+9);
#ifdef ATAFB_FALCON
else if (!strncmp(this_opt, "eclock:", 7)) {
fext.f = simple_strtoul(this_opt+7, NULL, 10);
/* external pixelclock in kHz --> ps */
fext.t = 1000000000/fext.f;
fext.f *= 1000;
}
else if (!strncmp(this_opt, "monitorcap:", 11))
atafb_setup_mcap(this_opt+11);
#endif
else if (!strcmp(this_opt, "keep"))
DontCalcRes = 1;
else if (!strncmp(this_opt, "R", 1))
atafb_setup_user(this_opt+1);
}
return 0;
}
#ifdef MODULE
MODULE_LICENSE("GPL");
int init_module(void)
{
return atafb_init();
}
#endif /* MODULE */
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