patch-2.1.67 linux/drivers/video/atafb.c
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- Lines: 3153
- Date:
Mon Nov 24 01:18:51 1997
- Orig file:
v2.1.66/linux/drivers/video/atafb.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -u --recursive --new-file v2.1.66/linux/drivers/video/atafb.c linux/drivers/video/atafb.c
@@ -0,0 +1,3152 @@
+/*
+ * 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/config.h>
+#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/malloc.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+
+#include <asm/setup.h>
+#include <asm/uaccess.h>
+#include <asm/pgtable.h>
+#include <asm/irq.h>
+
+#include <asm/atarihw.h>
+#include <asm/atariints.h>
+
+#include <linux/fb.h>
+#include <asm/atarikb.h>
+
+#define SWITCH_ACIA 0x01 /* modes for switch on OverScan */
+#define SWITCH_SND6 0x40
+#define SWITCH_SND7 0x80
+#define SWITCH_NONE 0x00
+
+
+#define arraysize(x) (sizeof(x)/sizeof(*(x)))
+
+#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;
+int ovsc_switchmode=0;
+
+static struct atari_fb_par {
+ unsigned long screen_base;
+ int yres_virtual;
+ union {
+ struct {
+ int mode;
+ int sync;
+ } tt, st;
+ 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;
+ /* 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;
+
+#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
+
+static struct fb_info fb_info;
+
+static unsigned long screen_base; /* base address of screen */
+static unsigned long real_screen_base; /* (only for Overscan) */
+
+static int screen_len;
+
+static int current_par_valid=0;
+
+static int currcon=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 unsigned long 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 acces 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[];
+
+/* import first 16 colors from fbcon.c */
+extern unsigned short packed16_cmap[16];
+
+
+/* ++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 atari_fb_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 atari_fb_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 atari_fb_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 atari_fb_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 atari_fb_par *par )
+ * Fill the hardware's 'par' structure.
+ *
+ * void (*set_par)( struct atari_fb_par *par )
+ * Set the hardware according to 'par'.
+ *
+ * int (*setcolreg)( unsigned regno, unsigned red,
+ * unsigned green, unsigned blue,
+ * unsigned transp )
+ * Set a single color register. The values supplied are already
+ * rounded down to the hardware's capabilities (according to the
+ * entries in the var structure). Return != 0 for invalid regno.
+ *
+ * int (*getcolreg)( unsigned regno, unsigned *red,
+ * unsigned *green, unsigned *blue,
+ * unsigned *transp )
+ * Read a single color register and split it into
+ * colors/transparent. Return != 0 for invalid regno.
+ *
+ * void (*set_screen_base)( unsigned long 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 atari_fb_par *par );
+ int (*decode_var)( struct fb_var_screeninfo *var,
+ struct atari_fb_par *par );
+ int (*encode_var)( struct fb_var_screeninfo *var,
+ struct atari_fb_par *par );
+ void (*get_par)( struct atari_fb_par *par );
+ void (*set_par)( struct atari_fb_par *par );
+ int (*getcolreg)( unsigned regno, unsigned *red,
+ unsigned *green, unsigned *blue,
+ unsigned *transp );
+ int (*setcolreg)( unsigned regno, unsigned red,
+ unsigned green, unsigned blue,
+ unsigned transp );
+ void (*set_screen_base)( unsigned long s_base );
+ int (*blank)( int blank_mode );
+ int (*pan_display)( struct fb_var_screeninfo *var,
+ struct atari_fb_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 *user0_names[] = {"user0", NULL};
+static char *user1_names[] = {"user1", NULL};
+static char *user2_names[] = {"user2", NULL};
+static char *user3_names[] = {"user3", NULL};
+static char *user4_names[] = {"user4", NULL};
+static char *user5_names[] = {"user5", NULL};
+static char *user6_names[] = {"user6", NULL};
+static char *user7_names[] = {"user7", NULL};
+static char *dummy_names[] = {"dummy", 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,
+ dummy_names, dummy_names, dummy_names, dummy_names,
+ dummy_names, dummy_names, dummy_names, dummy_names,
+ dummy_names, dummy_names,
+ user0_names,
+ user1_names,
+ user2_names,
+ user3_names,
+ user4_names,
+ user5_names,
+ user6_names,
+ user7_names,
+ NULL
+ /* ,NULL */ /* this causes a sigsegv on my gcc-2.5.8 */
+};
+
+static struct fb_var_screeninfo atari_fb_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 },
+ /* Minor 14..23 free for more standard video modes */
+ { 0, },
+ { 0, },
+ { 0, },
+ { 0, },
+ { 0, },
+ { 0, },
+ { 0, },
+ { 0, },
+ { 0, },
+ { 0, },
+ /* Minor 24..31 reserved for user defined video modes */
+ { /* user0, initialized to Rx;y;d from commandline, if supplied */
+ 0, 0, 0, 0, 0, 0, 0, 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 },
+ { /* user1 */
+ 0, 0, 0, 0, 0, 0, 0, 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 },
+ { /* user2 */
+ 0, 0, 0, 0, 0, 0, 0, 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 },
+ { /* user3 */
+ 0, 0, 0, 0, 0, 0, 0, 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 },
+ { /* user4 */
+ 0, 0, 0, 0, 0, 0, 0, 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 },
+ { /* user5 */
+ 0, 0, 0, 0, 0, 0, 0, 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 },
+ { /* user6 */
+ 0, 0, 0, 0, 0, 0, 0, 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 },
+ { /* user7 */
+ 0, 0, 0, 0, 0, 0, 0, 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_atari_fb_predefined=arraysize(atari_fb_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_atari_fb_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 atari_fb_par *par )
+
+{
+ int mode;
+
+ strcpy(fix->id,"Atari Builtin");
+ fix->smem_start = (char *)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;
+ return 0;
+}
+
+
+static int tt_decode_var( struct fb_var_screeninfo *var,
+ struct atari_fb_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 atari_fb_par *par )
+{
+ int linelen, i;
+ 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;
+ for (i=0; i<arraysize(var->reserved); i++)
+ var->reserved[i]=0;
+ return 0;
+}
+
+
+static void tt_get_par( struct atari_fb_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 = PTOV(addr);
+}
+
+static void tt_set_par( struct atari_fb_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 )
+{
+ if ((shifter_tt.tt_shiftmode & TT_SHIFTER_MODEMASK) == TT_SHIFTER_STHIGH)
+ regno += 254;
+ if (regno > 255)
+ return 1;
+ *blue = tt_palette[regno];
+ *green = (*blue >> 4) & 0xf;
+ *red = (*blue >> 8) & 0xf;
+ *blue &= 0xf;
+ *transp = 0;
+ return 0;
+}
+
+
+static int tt_setcolreg( unsigned regno, unsigned red,
+ unsigned green, unsigned blue,
+ unsigned transp )
+{
+ if ((shifter_tt.tt_shiftmode & TT_SHIFTER_MODEMASK) == TT_SHIFTER_STHIGH)
+ regno += 254;
+ if (regno > 255)
+ return 1;
+ tt_palette[regno] = (red << 8) | (green << 4) | blue;
+ 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 atari_fb_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(&atari_fb_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
+
+/* Multisync monitor capabilities */
+/* Atari-TOS defaults if no boot option present */
+static long vfmin=58, vfmax=62, hfmin=31000, hfmax=32000;
+
+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};
+
+
+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 atari_fb_par *par )
+{
+ strcpy(fix->id, "Atari Builtin");
+ fix->smem_start = (char *)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;
+ return 0;
+}
+
+
+static int falcon_decode_var( struct fb_var_screeninfo *var,
+ struct atari_fb_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 = &atari_fb_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) * hfmin < f25.f)
+ pclock = &f25;
+ else if ((plen * xres + f32.right+f32.hsync+f32.left) * hfmin < f32.f)
+ pclock = &f32;
+ else if ((plen * xres + fext.right+fext.hsync+fext.left) * 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 > 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 > hfmax || hfreq < 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 > vfmax && !doubleline && !interlace) {
+ /* Too high -> try again with doubleline */
+ doubleline = 1;
+ goto again;
+ }
+ else if (vfreq < vfmin && !interlace && !doubleline) {
+ /* Too low -> try again with interlace */
+ interlace = 1;
+ goto again;
+ }
+ else if (vfreq < 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)>vfmax; lines++)
+ ;
+ upper_margin += lines;
+ lower_margin += lines;
+ goto again;
+ }
+ else if (vfreq > vfmax && doubleline) {
+ /* Doubleline too high -> enlarge margins */
+ int lines;
+ for (lines=0; (hfreq*2)/(par->VFT+1+4*lines)>vfmax; lines+=2)
+ ;
+ upper_margin += lines;
+ lower_margin += lines;
+ goto again;
+ }
+ else if (vfreq > vfmax && interlace) {
+ /* Interlace, too high -> enlarge margins */
+ int lines;
+ for (lines=0; (hfreq*2)/(par->VFT+1+4*lines)>vfmax; lines++)
+ ;
+ upper_margin += lines;
+ lower_margin += lines;
+ goto again;
+ }
+ else if (vfreq < vfmin || vfreq > 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 atari_fb_par *par )
+{
+/* !!! only for VGA !!! */
+ int linelen, i;
+ int prescale, plen;
+ int hdb_off, hde_off, base_off;
+ struct falcon_hw *hw = &par->hw.falcon;
+
+ /* 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;
+ for (i=0; i<arraysize(var->reserved); i++)
+ var->reserved[i]=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 atari_fb_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 = PTOV(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 atari_fb_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 void 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;
+ }
+}
+
+
+static int falcon_pan_display( struct fb_var_screeninfo *var,
+ struct atari_fb_par *par )
+{
+ int xoffset;
+ int bpp = fb_display[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[currcon].var.xres_virtual - fb_display[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[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 )
+{ 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 >> 26) & 0x3f;
+ *green = (col >> 18) & 0x3f;
+ *blue = (col >> 2) & 0x3f;
+ *transp = 0;
+ return 0;
+}
+
+
+static int falcon_setcolreg( unsigned regno, unsigned red,
+ unsigned green, unsigned blue,
+ unsigned transp )
+{
+ if (regno > 255)
+ return 1;
+ f030_col[regno] = (red << 26) | (green << 18) | (blue << 2);
+ if (regno < 16) {
+ 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);
+#ifdef CONFIG_FBCON_CFB16
+ packed16_cmap[regno] = (red << 11) | (green << 5) | blue;
+#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 atari_fb_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:
+ vfmin = 70;
+ vfmax = 72;
+ hfmin = 35713;
+ hfmax = 35715;
+ break;
+ case F_MON_SC:
+ case F_MON_TV:
+ /* PAL...NTSC */
+ vfmin = 49; /* not 50, since TOS defaults to 49.9x Hz */
+ vfmax = 60;
+ hfmin = 15620;
+ 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(&atari_fb_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 atari_fb_par *par )
+
+{
+ int mode;
+
+ strcpy(fix->id,"Atari Builtin");
+ fix->smem_start = (char *)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;
+ return 0;
+}
+
+
+static int stste_decode_var( struct fb_var_screeninfo *var,
+ struct atari_fb_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 atari_fb_par *par )
+{
+ int linelen, i;
+ 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;
+ for (i=0; i<arraysize(var->reserved); i++)
+ var->reserved[i]=0;
+ return 0;
+}
+
+
+static void stste_get_par( struct atari_fb_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 = PTOV(addr);
+}
+
+static void stste_set_par( struct atari_fb_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 )
+{ unsigned col;
+
+ if (regno > 15)
+ return 1;
+ col = shifter_tt.color_reg[regno];
+ if (ATARIHW_PRESENT(EXTD_SHIFTER)) {
+ *red = ((col >> 7) & 0xe) | ((col >> 11) & 1);
+ *green = ((col >> 3) & 0xe) | ((col >> 7) & 1);
+ *blue = ((col << 1) & 0xe) | ((col >> 3) & 1);
+ }
+ else {
+ *red = (col >> 8) & 0x7;
+ *green = (col >> 4) & 0x7;
+ *blue = col & 0x7;
+ }
+ *transp = 0;
+ return 0;
+}
+
+
+static int stste_setcolreg( unsigned regno, unsigned red,
+ unsigned green, unsigned blue,
+ unsigned transp )
+{
+ if (regno > 15)
+ return 1;
+ 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 & 0x7) << 8) |
+ ((green & 0x7) << 4) |
+ (blue & 0x7);
+ return 0;
+}
+
+
+static int stste_detect( void )
+
+{ struct atari_fb_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(&atari_fb_predefined[0], &par);
+
+ if (!ATARIHW_PRESENT(EXTD_SHIFTER))
+ use_hwscroll = 0;
+ return 1;
+}
+
+static void stste_set_screen_base(unsigned long s_base)
+{
+ unsigned long addr;
+ addr= VTOP(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(int switchmode)
+{
+ unsigned long flags;
+ register unsigned char old, new;
+
+ if ((switchmode & (SWITCH_ACIA | SWITCH_SND6 | SWITCH_SND7)) == 0)
+ return;
+ save_flags(flags);
+ cli();
+
+ 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 (switchmode == SWITCH_ACIA)
+ acia.key_ctrl = (ACIA_DIV64|ACIA_D8N1S|ACIA_RHTID|ACIA_RIE);
+ else {
+ sound_ym.rd_data_reg_sel = 14;
+ sound_ym.wd_data = sound_ym.rd_data_reg_sel | switchmode;
+ }
+ restore_flags(flags);
+}
+
+/* ------------------- External Video ---------------------- */
+
+#ifdef ATAFB_EXT
+
+static int ext_encode_fix( struct fb_fix_screeninfo *fix,
+ struct atari_fb_par *par )
+
+{
+ strcpy(fix->id,"Unknown Extern");
+ fix->smem_start=(char *)external_addr;
+ fix->smem_len=(external_len + PAGE_SIZE -1) & PAGE_MASK;
+ 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 atari_fb_par *par )
+{
+ struct fb_var_screeninfo *myvar = &atari_fb_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 atari_fb_par *par )
+{
+ int i;
+
+ 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;
+ for (i=0; i<arraysize(var->reserved); i++)
+ var->reserved[i]=0;
+ return 0;
+}
+
+
+static void ext_get_par( struct atari_fb_par *par )
+{
+ par->screen_base = external_addr;
+}
+
+static void ext_set_par( struct atari_fb_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 )
+
+{ unsigned char colmask = (1 << external_bitspercol) - 1;
+
+ 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 )
+
+{ 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 = &atari_fb_predefined[0];
+ struct atari_fb_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(unsigned long s_base)
+{
+ unsigned long addr;
+ addr= VTOP(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 atari_fb_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[currcon].var.xres_virtual + var->xoffset)
+ * fb_display[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, tt_setcolreg,
+ 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,
+ falcon_setcolreg, 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_setcolreg,
+ 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, ext_setcolreg, NULL, NULL, NULL
+};
+#endif
+
+
+
+static void atari_fb_get_par( struct atari_fb_par *par )
+{
+ if (current_par_valid) {
+ *par=current_par;
+ }
+ else
+ fbhw->get_par(par);
+}
+
+
+static void atari_fb_set_par( struct atari_fb_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)
+{
+ 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 atari_fb_par par;
+ if ((err=fbhw->decode_var(var, &par)))
+ return err;
+ activate=var->activate;
+ if (((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) && isactive)
+ atari_fb_set_par(&par);
+ fbhw->encode_var(var, &par);
+ var->activate=activate;
+ return 0;
+}
+
+/* Functions for handling colormap */
+
+static void
+do_install_cmap(int con)
+{
+ if (con != currcon)
+ return;
+ if (fb_display[con].cmap.len)
+ fb_set_cmap(&fb_display[con].cmap, &(fb_display[con].var), 1,
+ fbhw->setcolreg);
+ else
+ fb_set_cmap(fb_default_cmap(fb_display[con].var.bits_per_pixel),
+ &(fb_display[con].var), 1,
+ fbhw->setcolreg);
+}
+
+
+ /*
+ * Open/Release the frame buffer device
+ */
+
+static int atari_fb_open(int fbidx)
+{
+ /*
+ * Nothing, only a usage count for the moment
+ */
+
+ MOD_INC_USE_COUNT;
+ return(0);
+}
+
+static int atari_fb_release(int fbidx)
+{
+ MOD_DEC_USE_COUNT;
+ return(0);
+}
+
+
+static int
+atari_fb_get_fix(struct fb_fix_screeninfo *fix, int con)
+{
+ struct atari_fb_par par;
+ if (con == -1)
+ atari_fb_get_par(&par);
+ else
+ fbhw->decode_var(&fb_display[con].var,&par);
+ memset(fix, 0, sizeof(struct fb_fix_screeninfo));
+ return fbhw->encode_fix(fix, &par);
+}
+
+static int
+atari_fb_get_var(struct fb_var_screeninfo *var, int con)
+{
+ struct atari_fb_par par;
+ if (con == -1) {
+ atari_fb_get_par(&par);
+ fbhw->encode_var(var, &par);
+ }
+ else
+ *var=fb_display[con].var;
+ return 0;
+}
+
+static void
+atari_fb_set_disp(int con)
+{
+ struct fb_fix_screeninfo fix;
+ struct display *display;
+
+ if (con >= 0)
+ display = &fb_display[con];
+ else
+ display = &disp; /* used during initialization */
+
+ atari_fb_get_fix(&fix, con);
+ if (con == -1)
+ con=0;
+ display->screen_base = (u_char *)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);
+}
+
+static int
+atari_fb_set_var(struct fb_var_screeninfo *var, int con)
+{
+ int err,oldxres,oldyres,oldbpp,oldxres_virtual,
+ oldyres_virtual,oldyoffset;
+ if ((err=do_fb_set_var(var, con==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) {
+ atari_fb_set_disp(con);
+ (*fb_info.changevar)(con);
+ fb_alloc_cmap(&fb_display[con].cmap, 0, 0);
+ do_install_cmap(con);
+ }
+ }
+ var->activate=0;
+ return 0;
+}
+
+
+
+static int
+atari_fb_get_cmap(struct fb_cmap *cmap, int kspc, int con)
+{
+ if (con == currcon) /* current console ? */
+ return fb_get_cmap(cmap, &(fb_display[con].var), kspc,
+ fbhw->getcolreg);
+ 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(fb_display[con].var.bits_per_pixel),
+ cmap, kspc ? 0 : 2);
+ return 0;
+}
+
+static int
+atari_fb_set_cmap(struct fb_cmap *cmap, int kspc, int con)
+{
+ int err;
+ if (! fb_display[con].cmap.len) { /* no colormap allocated ? */
+ if ((err = fb_alloc_cmap(&fb_display[con].cmap,
+ 1 << fb_display[con].var.bits_per_pixel,
+ 0)))
+ return err;
+ }
+ if (con == currcon) /* current console ? */
+ return fb_set_cmap(cmap, &(fb_display[con].var), kspc,
+ fbhw->setcolreg);
+ else
+ fb_copy_cmap(cmap, &fb_display[con].cmap, kspc ? 0 : 1);
+ return 0;
+}
+
+static int
+atari_fb_pan_display(struct fb_var_screeninfo *var, int con)
+{
+ 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 == currcon) {
+ if (fbhw->pan_display) {
+ if ((err = fbhw->pan_display(var, ¤t_par)))
+ return err;
+ }
+ else
+ return -EINVAL;
+ }
+ fb_display[con].var.xoffset = var->xoffset;
+ fb_display[con].var.yoffset = var->yoffset;
+ return 0;
+}
+
+static int
+atari_fb_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
+ unsigned long arg, int con)
+{
+ switch (cmd) {
+#ifdef FBCMD_GET_CURRENTPAR
+ case FBCMD_GET_CURRENTPAR:
+ if (copy_to_user((void *)arg, (void *)¤t_par,
+ sizeof(struct atari_fb_par)))
+ return -EFAULT;
+ return 0;
+#endif
+#ifdef FBCMD_SET_CURRENTPAR
+ case FBCMD_SET_CURRENTPAR:
+ if (copy_from_user((void *)¤t_par, (void *)arg,
+ sizeof(struct atari_fb_par)))
+ return -EFAULT;
+ atari_fb_set_par(¤t_par);
+ return 0;
+#endif
+ }
+ return -EINVAL;
+}
+
+static struct fb_ops atari_fb_ops = {
+ atari_fb_open, atari_fb_release, atari_fb_get_fix, atari_fb_get_var,
+ atari_fb_set_var, atari_fb_get_cmap, atari_fb_set_cmap,
+ atari_fb_pan_display, atari_fb_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=atari_fb_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=atari_fb_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\n");
+ var=atari_fb_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)
+{
+ /* Do we have to save the colormap ? */
+ if (fb_display[currcon].cmap.len)
+ fb_get_cmap(&fb_display[currcon].cmap,
+ &(fb_display[currcon].var), 1, fbhw->getcolreg);
+ do_fb_set_var(&fb_display[con].var,1);
+ currcon=con;
+ /* Install new colormap */
+ do_install_cmap(con);
+ return 0;
+}
+
+/* (un)blank/poweroff
+ * 0 = unblank
+ * 1 = blank
+ * 2 = suspend vsync
+ * 3 = suspend hsync
+ * 4 = off
+ */
+static void
+atafb_blank(int blank)
+{
+ unsigned short black[16];
+ struct fb_cmap cmap;
+ if (fbhw->blank && !fbhw->blank(blank))
+ return;
+ 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, &(fb_display[currcon].var), 1,
+ fbhw->setcolreg);
+ }
+ else
+ do_install_cmap(currcon);
+}
+
+static int
+atafb_setcmap(struct fb_cmap *cmap, int con)
+{
+ return(atari_fb_set_cmap(cmap, 1, con));
+}
+
+__initfunc(unsigned long atari_fb_init(unsigned long mem_start))
+{
+ int err;
+ int pad;
+ int detected_mode;
+ unsigned long mem_req;
+
+ if (!MACH_IS_ATARI)
+ return mem_start;
+
+ do {
+#ifdef ATAFB_EXT
+ if (external_addr) {
+ fbhw = &ext_switch;
+ break;
+ }
+#endif
+#ifdef ATAFB_TT
+ if (ATARIHW_PRESENT(TT_SHIFTER)) {
+ fbhw = &tt_switch;
+ break;
+ }
+#endif
+#ifdef ATAFB_FALCON
+ if (ATARIHW_PRESENT(VIDEL_SHIFTER)) {
+ fbhw = &falcon_switch;
+ 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;
+ break;
+ }
+ fbhw = &st_switch;
+ 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\n");
+#endif
+ } while (0);
+ 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 = ((mem_req + PAGE_SIZE - 1) & PAGE_MASK) + PAGE_SIZE;
+ screen_base = (unsigned long) atari_stram_alloc(mem_req, &mem_start);
+ memset((char *) screen_base, 0, mem_req);
+ pad = ((screen_base + PAGE_SIZE-1) & PAGE_MASK) - screen_base;
+ screen_base+=pad;
+ real_screen_base=screen_base+ovsc_offset;
+ screen_len = (mem_req - pad - ovsc_offset) & PAGE_MASK;
+ st_ovsc_switch(ovsc_switchmode);
+ 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( VTOP(screen_base), screen_len );
+ kernel_set_cachemode( screen_base, screen_len,
+ KERNELMAP_NO_COPYBACK );
+ }
+#ifdef ATAFB_EXT
+ }
+ else {
+ /* Map the video memory (physical address given) to somewhere
+ * in the kernel address space.
+ */
+ mem_start = PAGE_ALIGN(mem_start);
+ external_addr = kernel_map(external_addr, external_len,
+ KERNELMAP_NO_COPYBACK, &mem_start);
+ if (external_vgaiobase)
+ external_vgaiobase = kernel_map(external_vgaiobase,
+ 0x10000, KERNELMAP_NOCACHE_SER, &mem_start);
+ mem_start += PAGE_SIZE;
+ screen_base =
+ real_screen_base = external_addr;
+ screen_len = external_len & PAGE_MASK;
+ memset ((char *) screen_base, 0, external_len);
+ }
+#endif /* ATAFB_EXT */
+
+ strcpy(fb_info.modename, "Atari Builtin ");
+ fb_info.changevar = NULL;
+ fb_info.node = -1;
+ fb_info.fbops = &atari_fb_ops;
+ fb_info.fbvar_num = num_atari_fb_predefined;
+ fb_info.fbvar = atari_fb_predefined;
+ fb_info.disp = &disp;
+ fb_info.switch_con = &atafb_switch;
+ fb_info.updatevar = &fb_update_var;
+ fb_info.blank = &atafb_blank;
+ fb_info.setcmap = &atafb_setcmap;
+ do_fb_set_var(&atari_fb_predefined[default_par-1], 1);
+ strcat(fb_info.modename, fb_var_names[default_par-1][0]);
+
+ err=register_framebuffer(&fb_info);
+ if (err < 0)
+ return(err);
+
+ atari_fb_get_var(&disp.var, -1);
+ atari_fb_set_disp(-1);
+ 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);
+ do_install_cmap(0);
+ printk("%s frame buffer device, using %dK of video memory\n",
+ fb_info.modename, screen_len>>10);
+
+ /* TODO: This driver cannot be unloaded yet */
+ MOD_INC_USE_COUNT;
+
+ return mem_start;
+}
+
+/* a strtok which returns empty strings, too */
+
+static char * strtoke(char * s,const char * ct)
+{
+ char *sbegin, *send;
+ static char *ssave = NULL;
+
+ sbegin = s ? s : ssave;
+ if (!sbegin) {
+ return NULL;
+ }
+ if (*sbegin == '\0') {
+ ssave = NULL;
+ return NULL;
+ }
+ send = strpbrk(sbegin, ct);
+ if (send && *send != '\0')
+ *send++ = '\0';
+ ssave = send;
+ return sbegin;
+}
+
+__initfunc(void atari_video_setup( char *options, int *ints ))
+{
+ char *this_opt;
+ int temp;
+ char ext_str[80], int_str[100];
+ char mcap_spec[80];
+ char user_mode[80];
+
+ ext_str[0] =
+ int_str[0] =
+ mcap_spec[0] =
+ user_mode[0] =
+ fb_info.fontname[0] = '\0';
+
+ if (!options || !*options)
+ return;
+
+ for(this_opt=strtok(options,","); this_opt; this_opt=strtok(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;
+ }
+ else if (! strncmp(this_opt, "sw_",3)) {
+ if (! strcmp(this_opt+3, "acia"))
+ ovsc_switchmode = SWITCH_ACIA;
+ else if (! strcmp(this_opt+3, "snd6"))
+ ovsc_switchmode = SWITCH_SND6;
+ else if (! strcmp(this_opt+3, "snd7"))
+ ovsc_switchmode = SWITCH_SND7;
+ else ovsc_switchmode = SWITCH_NONE;
+ }
+#ifdef ATAFB_EXT
+ else if (!strcmp(this_opt,"mv300")) {
+ external_bitspercol = 8;
+ external_card_type = IS_MV300;
+ }
+ else if (!strncmp(this_opt,"external:",9))
+ strcpy(ext_str, this_opt+9);
+#endif
+ else if (!strncmp(this_opt,"internal:",9))
+ strcpy(int_str, 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))
+ strcpy(mcap_spec, this_opt+11);
+#endif
+ else if (!strcmp(this_opt, "keep"))
+ DontCalcRes = 1;
+ else if (!strncmp(this_opt, "R", 1))
+ strcpy(user_mode, this_opt+1);
+ }
+
+ if (*int_str) {
+ /* Format to config extended internal video hardware like OverScan:
+ "<switch-type>,internal:<xres>;<yres>;<xres_max>;<yres_max>;<offset>"
+ Explanation:
+ <switch-type> type to switch on higher resolution
+ sw_acia : via keyboard ACIA
+ sw_snd6 : via bit 6 of the soundchip port
+ sw_snd7 : via bit 7 of the soundchip port
+ <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 = strtoke(int_str, ";")) ||!*p) goto int_invalid;
+ xres = simple_strtoul(p, NULL, 10);
+ if (!(p = strtoke(NULL, ";")) || !*p) goto int_invalid;
+ sttt_xres=xres;
+ tt_yres=st_yres=simple_strtoul(p, NULL, 10);
+ if ((p=strtoke(NULL, ";")) && *p) {
+ sttt_xres_virtual=simple_strtoul(p, NULL, 10);
+ }
+ if ((p=strtoke(NULL, ";")) && *p) {
+ sttt_yres_virtual=simple_strtoul(p, NULL, 0);
+ }
+ if ((p=strtoke(NULL, ";")) && *p) {
+ ovsc_offset=simple_strtoul(p, NULL, 0);
+ }
+
+ if (ovsc_offset || (sttt_yres_virtual != st_yres))
+ use_hwscroll=0;
+ }
+ else
+ int_invalid: ovsc_switchmode = SWITCH_NONE;
+
+#ifdef ATAFB_EXT
+ if (*ext_str) {
+ 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 = strtoke(ext_str, ";")) ||!*p) goto ext_invalid;
+ xres_virtual = xres = simple_strtoul(p, NULL, 10);
+ if (xres <= 0) goto ext_invalid;
+
+ if (!(p = strtoke(NULL, ";")) ||!*p) goto ext_invalid;
+ yres = simple_strtoul(p, NULL, 10);
+ if (yres <= 0) goto ext_invalid;
+
+ if (!(p = strtoke(NULL, ";")) ||!*p) goto ext_invalid;
+ depth = simple_strtoul(p, NULL, 10);
+ if (depth != 1 && depth != 2 && depth != 4 && depth != 8 &&
+ depth != 16 && depth != 24) goto ext_invalid;
+
+ if (!(p = strtoke(NULL, ";")) ||!*p) goto ext_invalid;
+ 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
+ goto ext_invalid;
+
+
+ if (!(p = strtoke(NULL, ";")) ||!*p) goto ext_invalid;
+ addr = simple_strtoul(p, NULL, 0);
+
+ if (!(p = strtoke(NULL, ";")) ||!*p)
+ len = xres*yres*depth/8;
+ else
+ len = simple_strtoul(p, NULL, 0);
+
+ if ((p = strtoke(NULL, ";")) && *p) {
+ external_vgaiobase=simple_strtoul(p, NULL, 0);
+ }
+
+ if ((p = strtoke(NULL, ";")) && *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 = strtoke(NULL, ";")) && *p) {
+ if (!strcmp(p, "vga"))
+ external_card_type = IS_VGA;
+ if (!strcmp(p, "mv300"))
+ external_card_type = IS_MV300;
+ }
+
+ if ((p = strtoke(NULL, ";")) && *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 = 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;
+ }
+
+ ext_invalid:
+ ;
+ }
+#endif /* ATAFB_EXT */
+
+#ifdef ATAFB_FALCON
+ if (*mcap_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 = strtoke(mcap_spec, ";")) || !*p) goto cap_invalid;
+ vmin = simple_strtoul(p, NULL, 10);
+ if (vmin <= 0) goto cap_invalid;
+ if (!(p = strtoke(NULL, ";")) || !*p) goto cap_invalid;
+ vmax = simple_strtoul(p, NULL, 10);
+ if (vmax <= 0 || vmax <= vmin) goto cap_invalid;
+ if (!(p = strtoke(NULL, ";")) || !*p) goto cap_invalid;
+ hmin = 1000 * simple_strtoul(p, NULL, 10);
+ if (hmin <= 0) goto cap_invalid;
+ if (!(p = strtoke(NULL, "")) || !*p) goto cap_invalid;
+ hmax = 1000 * simple_strtoul(p, NULL, 10);
+ if (hmax <= 0 || hmax <= hmin) goto cap_invalid;
+
+ vfmin = vmin;
+ vfmax = vmax;
+ hfmin = hmin;
+ hfmax = hmax;
+ cap_invalid:
+ ;
+ }
+#endif
+
+ if (*user_mode) {
+ /* Format of user defined video mode is: <xres>;<yres>;<depth>
+ */
+ char *p;
+ int xres, yres, depth, temp;
+
+ if (!(p = strtoke(user_mode, ";")) || !*p) goto user_invalid;
+ xres = simple_strtoul(p, NULL, 10);
+ if (!(p = strtoke(NULL, ";")) || !*p) goto user_invalid;
+ yres = simple_strtoul(p, NULL, 10);
+ if (!(p = strtoke(NULL, "")) || !*p) goto user_invalid;
+ depth = simple_strtoul(p, NULL, 10);
+ if ((temp=get_video_mode("user0"))) {
+ default_par=temp;
+ atari_fb_predefined[default_par-1].xres = xres;
+ atari_fb_predefined[default_par-1].yres = yres;
+ atari_fb_predefined[default_par-1].bits_per_pixel = depth;
+ }
+
+ user_invalid:
+ ;
+ }
+}
+
+#ifdef MODULE
+int init_module(void)
+{
+ return(atari_fb_init(NULL));
+}
+
+void cleanup_module(void)
+{
+ /* Not reached because the usecount will never
+ be decremented to zero */
+ unregister_framebuffer(&fb_info);
+ /* TODO: clean up ... */
+}
+#endif /* MODULE */
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TCL-scripts by Sam Shen, slshen@lbl.gov