2 * linux/drivers/video/atafb.c -- Atari builtin chipset frame buffer device
4 * Copyright (C) 1994 Martin Schaller & Roman Hodek
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file COPYING in the main directory of this archive
11 * - 03 Jan 95: Original version by Martin Schaller: The TT driver and
12 * all the device independent stuff
13 * - 09 Jan 95: Roman: I've added the hardware abstraction (hw_switch)
14 * and wrote the Falcon, ST(E), and External drivers
15 * based on the original TT driver.
16 * - 07 May 95: Martin: Added colormap operations for the external driver
17 * - 21 May 95: Martin: Added support for overscan
18 * Andreas: some bug fixes for this
19 * - Jul 95: Guenther Kelleter <guenther@pool.informatik.rwth-aachen.de>:
20 * Programmable Falcon video modes
21 * (thanks to Christian Cartus for documentation
22 * of VIDEL registers).
23 * - 27 Dec 95: Guenther: Implemented user definable video modes "user[0-7]"
24 * on minor 24...31. "user0" may be set on commandline by
25 * "R<x>;<y>;<depth>". (Makes sense only on Falcon)
26 * Video mode switch on Falcon now done at next VBL interrupt
27 * to avoid the annoying right shift of the screen.
28 * - 23 Sep 97: Juergen: added xres_virtual for cards like ProMST
29 * The external-part is legacy, therefore hardware-specific
30 * functions like panning/hardwarescrolling/blanking isn't
32 * - 29 Sep 97: Juergen: added Romans suggestion for pan_display
33 * (var->xoffset was changed even if no set_screen_base avail.)
34 * - 05 Oct 97: Juergen: extfb (PACKED_PIXEL) is FB_PSEUDOCOLOR 'cause
35 * we know how to set the colors
36 * ext_*palette: read from ext_colors (former MV300_colors)
37 * write to ext_colors and RAMDAC
40 * - For the Falcon it is not possible to set random video modes on
41 * SM124 and SC/TV, only the bootup resolution is supported.
50 #include <linux/module.h>
51 #include <linux/kernel.h>
52 #include <linux/errno.h>
53 #include <linux/string.h>
55 #include <linux/delay.h>
56 #include <linux/init.h>
57 #include <linux/interrupt.h>
59 #include <asm/setup.h>
60 #include <linux/uaccess.h>
61 #include <asm/pgtable.h>
65 #include <asm/atarihw.h>
66 #include <asm/atariints.h>
67 #include <asm/atari_stram.h>
70 #include <asm/atarikb.h>
75 #define SWITCH_ACIA 0x01 /* modes for switch on OverScan */
76 #define SWITCH_SND6 0x40
77 #define SWITCH_SND7 0x80
78 #define SWITCH_NONE 0x00
81 #define up(x, r) (((x) + (r) - 1) & ~((r)-1))
84 * Interface to the world
87 static int atafb_check_var(struct fb_var_screeninfo *var, struct fb_info *info);
88 static int atafb_set_par(struct fb_info *info);
89 static int atafb_setcolreg(unsigned int regno, unsigned int red, unsigned int green,
90 unsigned int blue, unsigned int transp,
91 struct fb_info *info);
92 static int atafb_blank(int blank, struct fb_info *info);
93 static int atafb_pan_display(struct fb_var_screeninfo *var,
94 struct fb_info *info);
95 static void atafb_fillrect(struct fb_info *info,
96 const struct fb_fillrect *rect);
97 static void atafb_copyarea(struct fb_info *info,
98 const struct fb_copyarea *region);
99 static void atafb_imageblit(struct fb_info *info, const struct fb_image *image);
100 static int atafb_ioctl(struct fb_info *info, unsigned int cmd,
104 static int default_par; /* default resolution (0=none) */
106 static unsigned long default_mem_req;
108 static int hwscroll = -1;
110 static int use_hwscroll = 1;
112 static int sttt_xres = 640, st_yres = 400, tt_yres = 480;
113 static int sttt_xres_virtual = 640, sttt_yres_virtual = 400;
114 static int ovsc_offset, ovsc_addlen;
117 * Hardware parameters for current mode
120 static struct atafb_par {
124 #if defined ATAFB_TT || defined ATAFB_STE
133 /* Here are fields for storing a video mode, as direct
134 * parameters for the hardware.
144 short hht, hbb, hbe, hdb, hde, hss;
145 short vft, vbb, vbe, vdb, vde, vss;
146 /* auxiliary information */
150 u32 pseudo_palette[16];
153 /* Nothing needed for external mode */
157 /* Don't calculate an own resolution, and thus don't change the one found when
158 * booting (currently used for the Falcon to keep settings for internal video
159 * hardware extensions (e.g. ScreenBlaster) */
160 static int DontCalcRes = 0;
163 #define HHT hw.falcon.hht
164 #define HBB hw.falcon.hbb
165 #define HBE hw.falcon.hbe
166 #define HDB hw.falcon.hdb
167 #define HDE hw.falcon.hde
168 #define HSS hw.falcon.hss
169 #define VFT hw.falcon.vft
170 #define VBB hw.falcon.vbb
171 #define VBE hw.falcon.vbe
172 #define VDB hw.falcon.vdb
173 #define VDE hw.falcon.vde
174 #define VSS hw.falcon.vss
175 #define VCO_CLOCK25 0x04
176 #define VCO_CSYPOS 0x10
177 #define VCO_VSYPOS 0x20
178 #define VCO_HSYPOS 0x40
179 #define VCO_SHORTOFFS 0x100
180 #define VMO_DOUBLE 0x01
181 #define VMO_INTER 0x02
182 #define VMO_PREMASK 0x0c
185 static struct fb_info fb_info = {
188 .visual = FB_VISUAL_PSEUDOCOLOR,
189 .accel = FB_ACCEL_NONE,
193 static void *screen_base; /* base address of screen */
194 static void *real_screen_base; /* (only for Overscan) */
196 static int screen_len;
198 static int current_par_valid;
200 static int mono_moni;
205 /* external video handling */
206 static unsigned int external_xres;
207 static unsigned int external_xres_virtual;
208 static unsigned int external_yres;
211 * not needed - atafb will never support panning/hardwarescroll with external
212 * static unsigned int external_yres_virtual;
214 static unsigned int external_depth;
215 static int external_pmode;
216 static void *external_addr;
217 static unsigned long external_len;
218 static unsigned long external_vgaiobase;
219 static unsigned int external_bitspercol = 6;
222 * JOE <joe@amber.dinoco.de>:
223 * added card type for external driver, is only needed for
226 enum cardtype { IS_VGA, IS_MV300 };
227 static enum cardtype external_card_type = IS_VGA;
230 * The MV300 mixes the color registers. So we need an array of munged
231 * indices in order to access the correct reg.
233 static int MV300_reg_1bit[2] = {
236 static int MV300_reg_4bit[16] = {
237 0, 8, 4, 12, 2, 10, 6, 14, 1, 9, 5, 13, 3, 11, 7, 15
239 static int MV300_reg_8bit[256] = {
240 0, 128, 64, 192, 32, 160, 96, 224, 16, 144, 80, 208, 48, 176, 112, 240,
241 8, 136, 72, 200, 40, 168, 104, 232, 24, 152, 88, 216, 56, 184, 120, 248,
242 4, 132, 68, 196, 36, 164, 100, 228, 20, 148, 84, 212, 52, 180, 116, 244,
243 12, 140, 76, 204, 44, 172, 108, 236, 28, 156, 92, 220, 60, 188, 124, 252,
244 2, 130, 66, 194, 34, 162, 98, 226, 18, 146, 82, 210, 50, 178, 114, 242,
245 10, 138, 74, 202, 42, 170, 106, 234, 26, 154, 90, 218, 58, 186, 122, 250,
246 6, 134, 70, 198, 38, 166, 102, 230, 22, 150, 86, 214, 54, 182, 118, 246,
247 14, 142, 78, 206, 46, 174, 110, 238, 30, 158, 94, 222, 62, 190, 126, 254,
248 1, 129, 65, 193, 33, 161, 97, 225, 17, 145, 81, 209, 49, 177, 113, 241,
249 9, 137, 73, 201, 41, 169, 105, 233, 25, 153, 89, 217, 57, 185, 121, 249,
250 5, 133, 69, 197, 37, 165, 101, 229, 21, 149, 85, 213, 53, 181, 117, 245,
251 13, 141, 77, 205, 45, 173, 109, 237, 29, 157, 93, 221, 61, 189, 125, 253,
252 3, 131, 67, 195, 35, 163, 99, 227, 19, 147, 83, 211, 51, 179, 115, 243,
253 11, 139, 75, 203, 43, 171, 107, 235, 27, 155, 91, 219, 59, 187, 123, 251,
254 7, 135, 71, 199, 39, 167, 103, 231, 23, 151, 87, 215, 55, 183, 119, 247,
255 15, 143, 79, 207, 47, 175, 111, 239, 31, 159, 95, 223, 63, 191, 127, 255
258 static int *MV300_reg = MV300_reg_8bit;
259 #endif /* ATAFB_EXT */
264 extern int fontheight_8x8;
265 extern int fontwidth_8x8;
266 extern unsigned char fontdata_8x8[];
268 extern int fontheight_8x16;
269 extern int fontwidth_8x16;
270 extern unsigned char fontdata_8x16[];
274 * * open/release and usage marking
275 * struct module *owner;
276 * int (*fb_open)(struct fb_info *info, int user);
277 * int (*fb_release)(struct fb_info *info, int user);
279 * * For framebuffers with strange non linear layouts or that do not
280 * * work with normal memory mapped access
281 * ssize_t (*fb_read)(struct file *file, char __user *buf, size_t count, loff_t *ppos);
282 * ssize_t (*fb_write)(struct file *file, const char __user *buf, size_t count, loff_t *ppos);
284 * * checks var and eventually tweaks it to something supported,
285 * * DOES NOT MODIFY PAR *
286 * int (*fb_check_var)(struct fb_var_screeninfo *var, struct fb_info *info);
288 * * set the video mode according to info->var *
289 * int (*fb_set_par)(struct fb_info *info);
291 * * set color register *
292 * int (*fb_setcolreg)(unsigned int regno, unsigned int red, unsigned int green,
293 * unsigned int blue, unsigned int transp, struct fb_info *info);
295 * * set color registers in batch *
296 * int (*fb_setcmap)(struct fb_cmap *cmap, struct fb_info *info);
299 * int (*fb_blank)(int blank, struct fb_info *info);
302 * int (*fb_pan_display)(struct fb_var_screeninfo *var, struct fb_info *info);
304 * *** The meat of the drawing engine ***
305 * * Draws a rectangle *
306 * void (*fb_fillrect) (struct fb_info *info, const struct fb_fillrect *rect);
307 * * Copy data from area to another *
308 * void (*fb_copyarea) (struct fb_info *info, const struct fb_copyarea *region);
309 * * Draws a image to the display *
310 * void (*fb_imageblit) (struct fb_info *info, const struct fb_image *image);
313 * int (*fb_cursor) (struct fb_info *info, struct fb_cursor *cursor);
315 * * Rotates the display *
316 * void (*fb_rotate)(struct fb_info *info, int angle);
318 * * wait for blit idle, optional *
319 * int (*fb_sync)(struct fb_info *info);
321 * * perform fb specific ioctl (optional) *
322 * int (*fb_ioctl)(struct fb_info *info, unsigned int cmd,
323 * unsigned long arg);
325 * * Handle 32bit compat ioctl (optional) *
326 * int (*fb_compat_ioctl)(struct fb_info *info, unsigned int cmd,
327 * unsigned long arg);
329 * * perform fb specific mmap *
330 * int (*fb_mmap)(struct fb_info *info, struct vm_area_struct *vma);
335 /* ++roman: This structure abstracts from the underlying hardware (ST(e),
338 * int (*detect)(void)
339 * This function should detect the current video mode settings and
340 * store them in atafb_predefined[0] for later reference by the
341 * user. Return the index+1 of an equivalent predefined mode or 0
342 * if there is no such.
344 * int (*encode_fix)(struct fb_fix_screeninfo *fix,
345 * struct atafb_par *par)
346 * This function should fill in the 'fix' structure based on the
347 * values in the 'par' structure.
348 * !!! Obsolete, perhaps !!!
350 * int (*decode_var)(struct fb_var_screeninfo *var,
351 * struct atafb_par *par)
352 * Get the video params out of 'var'. If a value doesn't fit, round
353 * it up, if it's too big, return EINVAL.
354 * Round up in the following order: bits_per_pixel, xres, yres,
355 * xres_virtual, yres_virtual, xoffset, yoffset, grayscale, bitfields,
356 * horizontal timing, vertical timing.
358 * int (*encode_var)(struct fb_var_screeninfo *var,
359 * struct atafb_par *par);
360 * Fill the 'var' structure based on the values in 'par' and maybe
361 * other values read out of the hardware.
363 * void (*get_par)(struct atafb_par *par)
364 * Fill the hardware's 'par' structure.
365 * !!! Used only by detect() !!!
367 * void (*set_par)(struct atafb_par *par)
368 * Set the hardware according to 'par'.
370 * void (*set_screen_base)(void *s_base)
371 * Set the base address of the displayed frame buffer. Only called
372 * if yres_virtual > yres or xres_virtual > xres.
374 * int (*blank)(int blank_mode)
375 * Blank the screen if blank_mode != 0, else unblank. If blank == NULL then
376 * the caller blanks by setting the CLUT to all black. Return 0 if blanking
377 * succeeded, !=0 if un-/blanking failed due to e.g. a video mode which
378 * doesn't support it. Implements VESA suspend and powerdown modes on
379 * hardware that supports disabling hsync/vsync:
380 * blank_mode == 2: suspend vsync, 3:suspend hsync, 4: powerdown.
383 static struct fb_hwswitch {
385 int (*encode_fix)(struct fb_fix_screeninfo *fix,
386 struct atafb_par *par);
387 int (*decode_var)(struct fb_var_screeninfo *var,
388 struct atafb_par *par);
389 int (*encode_var)(struct fb_var_screeninfo *var,
390 struct atafb_par *par);
391 void (*get_par)(struct atafb_par *par);
392 void (*set_par)(struct atafb_par *par);
393 void (*set_screen_base)(void *s_base);
394 int (*blank)(int blank_mode);
395 int (*pan_display)(struct fb_var_screeninfo *var,
396 struct fb_info *info);
399 static char *autodetect_names[] = { "autodetect", NULL };
400 static char *stlow_names[] = { "stlow", NULL };
401 static char *stmid_names[] = { "stmid", "default5", NULL };
402 static char *sthigh_names[] = { "sthigh", "default4", NULL };
403 static char *ttlow_names[] = { "ttlow", NULL };
404 static char *ttmid_names[] = { "ttmid", "default1", NULL };
405 static char *tthigh_names[] = { "tthigh", "default2", NULL };
406 static char *vga2_names[] = { "vga2", NULL };
407 static char *vga4_names[] = { "vga4", NULL };
408 static char *vga16_names[] = { "vga16", "default3", NULL };
409 static char *vga256_names[] = { "vga256", NULL };
410 static char *falh2_names[] = { "falh2", NULL };
411 static char *falh16_names[] = { "falh16", NULL };
413 static char **fb_var_names[] = {
430 static struct fb_var_screeninfo atafb_predefined[] = {
432 * yres_virtual == 0 means use hw-scrolling if possible, else yres
435 0, 0, 0, 0, 0, 0, 0, 0, /* xres-grayscale */
436 {0, 0, 0}, {0, 0, 0}, {0, 0, 0}, {0, 0, 0}, /* red green blue tran*/
437 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
439 320, 200, 320, 0, 0, 0, 4, 0,
440 {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
441 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
443 640, 200, 640, 0, 0, 0, 2, 0,
444 {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
445 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
447 640, 400, 640, 0, 0, 0, 1, 0,
448 {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
449 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
451 320, 480, 320, 0, 0, 0, 8, 0,
452 {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
453 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
455 640, 480, 640, 0, 0, 0, 4, 0,
456 {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
457 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
459 1280, 960, 1280, 0, 0, 0, 1, 0,
460 {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
461 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
463 640, 480, 640, 0, 0, 0, 1, 0,
464 {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
465 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
467 640, 480, 640, 0, 0, 0, 2, 0,
468 {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
469 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
471 640, 480, 640, 0, 0, 0, 4, 0,
472 {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
473 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
475 640, 480, 640, 0, 0, 0, 8, 0,
476 {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
477 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
479 896, 608, 896, 0, 0, 0, 1, 0,
480 {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
481 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
483 896, 608, 896, 0, 0, 0, 4, 0,
484 {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
485 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
488 static int num_atafb_predefined = ARRAY_SIZE(atafb_predefined);
490 static struct fb_videomode atafb_modedb[] __initdata = {
494 * If you change these, make sure to update DEFMODE_* as well!
502 /* 320x200, 15 kHz, 60 Hz (ST low) */
503 "st-low", 60, 320, 200, 32000, 32, 16, 31, 14, 96, 4,
504 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
506 /* 640x200, 15 kHz, 60 Hz (ST medium) */
507 "st-mid", 60, 640, 200, 32000, 32, 16, 31, 14, 96, 4,
508 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
510 /* 640x400, 30.25 kHz, 63.5 Hz (ST high) */
511 "st-high", 63, 640, 400, 32000, 128, 0, 40, 14, 128, 4,
512 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
514 /* 320x480, 15 kHz, 60 Hz (TT low) */
515 "tt-low", 60, 320, 480, 31041, 120, 100, 8, 16, 140, 30,
516 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
518 /* 640x480, 29 kHz, 57 Hz (TT medium) */
519 "tt-mid", 60, 640, 480, 31041, 120, 100, 8, 16, 140, 30,
520 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
522 /* 1280x960, 29 kHz, 60 Hz (TT high) */
523 "tt-high", 57, 640, 960, 31041, 120, 100, 8, 16, 140, 30,
524 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
532 /* 640x480, 31 kHz, 60 Hz (VGA) */
533 "vga", 63.5, 640, 480, 32000, 18, 42, 31, 11, 96, 3,
534 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
536 /* 640x400, 31 kHz, 70 Hz (VGA) */
537 "vga70", 70, 640, 400, 32000, 18, 42, 31, 11, 96, 3,
538 FB_SYNC_VERT_HIGH_ACT | FB_SYNC_COMP_HIGH_ACT, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
542 * Falcon HiRes Video Modes
546 /* 896x608, 31 kHz, 60 Hz (Falcon High) */
547 "falh", 60, 896, 608, 32000, 18, 42, 31, 1, 96,3,
548 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
552 #define NUM_TOTAL_MODES ARRAY_SIZE(atafb_modedb)
554 static char *mode_option __initdata = NULL;
558 #define DEFMODE_TT 5 /* "tt-high" for TT */
559 #define DEFMODE_F30 7 /* "vga70" for Falcon */
560 #define DEFMODE_STE 2 /* "st-high" for ST/E */
561 #define DEFMODE_EXT 6 /* "vga" for external */
564 static int get_video_mode(char *vname)
570 name_list = fb_var_names;
571 for (i = 0; i < num_atafb_predefined; i++) {
576 if (!strcmp(vname, *name))
586 /* ------------------- TT specific functions ---------------------- */
590 static int tt_encode_fix(struct fb_fix_screeninfo *fix, struct atafb_par *par)
594 strcpy(fix->id, "Atari Builtin");
595 fix->smem_start = (unsigned long)real_screen_base;
596 fix->smem_len = screen_len;
597 fix->type = FB_TYPE_INTERLEAVED_PLANES;
599 fix->visual = FB_VISUAL_PSEUDOCOLOR;
600 mode = par->hw.tt.mode & TT_SHIFTER_MODEMASK;
601 if (mode == TT_SHIFTER_TTHIGH || mode == TT_SHIFTER_STHIGH) {
602 fix->type = FB_TYPE_PACKED_PIXELS;
604 if (mode == TT_SHIFTER_TTHIGH)
605 fix->visual = FB_VISUAL_MONO01;
610 fix->line_length = par->next_line;
611 fix->accel = FB_ACCEL_ATARIBLITT;
615 static int tt_decode_var(struct fb_var_screeninfo *var, struct atafb_par *par)
617 int xres = var->xres;
618 int yres = var->yres;
619 int bpp = var->bits_per_pixel;
621 int yres_virtual = var->yres_virtual;
624 if (bpp > 1 || xres > sttt_xres * 2 || yres > tt_yres * 2)
626 par->hw.tt.mode = TT_SHIFTER_TTHIGH;
627 xres = sttt_xres * 2;
631 if (bpp > 8 || xres > sttt_xres || yres > tt_yres)
634 if (xres > sttt_xres / 2 || yres > tt_yres)
636 par->hw.tt.mode = TT_SHIFTER_TTLOW;
637 xres = sttt_xres / 2;
640 } else if (bpp > 2) {
641 if (xres > sttt_xres || yres > tt_yres)
643 if (xres > sttt_xres / 2 || yres > st_yres / 2) {
644 par->hw.tt.mode = TT_SHIFTER_TTMID;
649 par->hw.tt.mode = TT_SHIFTER_STLOW;
650 xres = sttt_xres / 2;
654 } else if (bpp > 1) {
655 if (xres > sttt_xres || yres > st_yres / 2)
657 par->hw.tt.mode = TT_SHIFTER_STMID;
661 } else if (var->xres > sttt_xres || var->yres > st_yres) {
664 par->hw.tt.mode = TT_SHIFTER_STHIGH;
670 if (yres_virtual <= 0)
672 else if (yres_virtual < yres)
674 if (var->sync & FB_SYNC_EXT)
678 linelen = xres * bpp / 8;
679 if (yres_virtual * linelen > screen_len && screen_len)
681 if (yres * linelen > screen_len && screen_len)
683 if (var->yoffset + yres > yres_virtual && yres_virtual)
685 par->yres_virtual = yres_virtual;
686 par->screen_base = screen_base + var->yoffset * linelen;
687 par->next_line = linelen;
691 static int tt_encode_var(struct fb_var_screeninfo *var, struct atafb_par *par)
694 memset(var, 0, sizeof(struct fb_var_screeninfo));
697 var->red.msb_right = 0;
700 var->pixclock = 31041;
701 var->left_margin = 120; /* these may be incorrect */
702 var->right_margin = 100;
703 var->upper_margin = 8;
704 var->lower_margin = 16;
705 var->hsync_len = 140;
711 if (par->hw.tt.sync & 1)
714 var->sync = FB_SYNC_EXT;
716 switch (par->hw.tt.mode & TT_SHIFTER_MODEMASK) {
717 case TT_SHIFTER_STLOW:
718 var->xres = sttt_xres / 2;
719 var->xres_virtual = sttt_xres_virtual / 2;
720 var->yres = st_yres / 2;
721 var->bits_per_pixel = 4;
723 case TT_SHIFTER_STMID:
724 var->xres = sttt_xres;
725 var->xres_virtual = sttt_xres_virtual;
726 var->yres = st_yres / 2;
727 var->bits_per_pixel = 2;
729 case TT_SHIFTER_STHIGH:
730 var->xres = sttt_xres;
731 var->xres_virtual = sttt_xres_virtual;
733 var->bits_per_pixel = 1;
735 case TT_SHIFTER_TTLOW:
736 var->xres = sttt_xres / 2;
737 var->xres_virtual = sttt_xres_virtual / 2;
739 var->bits_per_pixel = 8;
741 case TT_SHIFTER_TTMID:
742 var->xres = sttt_xres;
743 var->xres_virtual = sttt_xres_virtual;
745 var->bits_per_pixel = 4;
747 case TT_SHIFTER_TTHIGH:
749 var->xres = sttt_xres * 2;
750 var->xres_virtual = sttt_xres_virtual * 2;
751 var->yres = tt_yres * 2;
752 var->bits_per_pixel = 1;
755 var->blue = var->green = var->red;
756 var->transp.offset = 0;
757 var->transp.length = 0;
758 var->transp.msb_right = 0;
759 linelen = var->xres_virtual * var->bits_per_pixel / 8;
761 var->yres_virtual = var->yres;
762 else if (screen_len) {
763 if (par->yres_virtual)
764 var->yres_virtual = par->yres_virtual;
766 /* yres_virtual == 0 means use maximum */
767 var->yres_virtual = screen_len / linelen;
770 var->yres_virtual = 2 * var->yres;
772 var->yres_virtual = var->yres + hwscroll * 16;
776 var->yoffset = (par->screen_base - screen_base) / linelen;
781 var->vmode = FB_VMODE_NONINTERLACED;
785 static void tt_get_par(struct atafb_par *par)
788 par->hw.tt.mode = shifter_tt.tt_shiftmode;
789 par->hw.tt.sync = shifter.syncmode;
790 addr = ((shifter.bas_hi & 0xff) << 16) |
791 ((shifter.bas_md & 0xff) << 8) |
792 ((shifter.bas_lo & 0xff));
793 par->screen_base = phys_to_virt(addr);
796 static void tt_set_par(struct atafb_par *par)
798 shifter_tt.tt_shiftmode = par->hw.tt.mode;
799 shifter.syncmode = par->hw.tt.sync;
800 /* only set screen_base if really necessary */
801 if (current_par.screen_base != par->screen_base)
802 fbhw->set_screen_base(par->screen_base);
805 static int tt_setcolreg(unsigned int regno, unsigned int red,
806 unsigned int green, unsigned int blue,
807 unsigned int transp, struct fb_info *info)
809 if ((shifter_tt.tt_shiftmode & TT_SHIFTER_MODEMASK) == TT_SHIFTER_STHIGH)
813 tt_palette[regno] = (((red >> 12) << 8) | ((green >> 12) << 4) |
815 if ((shifter_tt.tt_shiftmode & TT_SHIFTER_MODEMASK) ==
816 TT_SHIFTER_STHIGH && regno == 254)
821 static int tt_detect(void)
823 struct atafb_par par;
825 /* Determine the connected monitor: The DMA sound must be
826 * disabled before reading the MFP GPIP, because the Sound
827 * Done Signal and the Monochrome Detect are XORed together!
829 * Even on a TT, we should look if there is a DMA sound. It was
830 * announced that the Eagle is TT compatible, but only the PCM is
833 if (ATARIHW_PRESENT(PCM_8BIT)) {
834 tt_dmasnd.ctrl = DMASND_CTRL_OFF;
835 udelay(20); /* wait a while for things to settle down */
837 mono_moni = (st_mfp.par_dt_reg & 0x80) == 0;
840 tt_encode_var(&atafb_predefined[0], &par);
845 #endif /* ATAFB_TT */
847 /* ------------------- Falcon specific functions ---------------------- */
851 static int mon_type; /* Falcon connected monitor */
852 static int f030_bus_width; /* Falcon ram bus width (for vid_control) */
858 static struct pixel_clock {
859 unsigned long f; /* f/[Hz] */
860 unsigned long t; /* t/[ps] (=1/f) */
861 int right, hsync, left; /* standard timing in clock cycles, not pixel */
862 /* hsync initialized in falcon_detect() */
863 int sync_mask; /* or-mask for hw.falcon.sync to set this clock */
864 int control_mask; /* ditto, for hw.falcon.vid_control */
866 25175000, 39721, 18, 0, 42, 0x0, VCO_CLOCK25
868 32000000, 31250, 18, 0, 42, 0x0, 0
870 0, 0, 18, 0, 42, 0x1, 0
873 /* VIDEL-prescale values [mon_type][pixel_length from VCO] */
874 static int vdl_prescale[4][3] = {
875 { 4,2,1 }, { 4,2,1 }, { 4,2,2 }, { 4,2,1 }
878 /* Default hsync timing [mon_type] in picoseconds */
879 static long h_syncs[4] = { 3000000, 4875000, 4000000, 4875000 };
881 static inline int hxx_prescale(struct falcon_hw *hw)
883 return hw->ste_mode ? 16
884 : vdl_prescale[mon_type][hw->vid_mode >> 2 & 0x3];
887 static int falcon_encode_fix(struct fb_fix_screeninfo *fix,
888 struct atafb_par *par)
890 strcpy(fix->id, "Atari Builtin");
891 fix->smem_start = (unsigned long)real_screen_base;
892 fix->smem_len = screen_len;
893 fix->type = FB_TYPE_INTERLEAVED_PLANES;
895 fix->visual = FB_VISUAL_PSEUDOCOLOR;
899 if (par->hw.falcon.mono) {
900 fix->type = FB_TYPE_PACKED_PIXELS;
902 /* no smooth scrolling with longword aligned video mem */
904 } else if (par->hw.falcon.f_shift & 0x100) {
905 fix->type = FB_TYPE_PACKED_PIXELS;
907 /* Is this ok or should it be DIRECTCOLOR? */
908 fix->visual = FB_VISUAL_TRUECOLOR;
911 fix->line_length = par->next_line;
912 fix->accel = FB_ACCEL_ATARIBLITT;
916 static int falcon_decode_var(struct fb_var_screeninfo *var,
917 struct atafb_par *par)
919 int bpp = var->bits_per_pixel;
920 int xres = var->xres;
921 int yres = var->yres;
922 int xres_virtual = var->xres_virtual;
923 int yres_virtual = var->yres_virtual;
924 int left_margin, right_margin, hsync_len;
925 int upper_margin, lower_margin, vsync_len;
927 int interlace = 0, doubleline = 0;
928 struct pixel_clock *pclock;
929 int plen; /* width of pixel in clock cycles */
934 int hdb_off, hde_off, base_off;
935 int gstart, gend1, gend2, align;
938 Get the video params out of 'var'. If a value doesn't fit, round
939 it up, if it's too big, return EINVAL.
940 Round up in the following order: bits_per_pixel, xres, yres,
941 xres_virtual, yres_virtual, xoffset, yoffset, grayscale, bitfields,
942 horizontal timing, vertical timing.
944 There is a maximum of screen resolution determined by pixelclock
945 and minimum frame rate -- (X+hmarg.)*(Y+vmarg.)*vfmin <= pixelclock.
946 In interlace mode this is " * " *vfmin <= pixelclock.
947 Additional constraints: hfreq.
948 Frequency range for multisync monitors is given via command line.
949 For TV and SM124 both frequencies are fixed.
951 X % 16 == 0 to fit 8x?? font (except 1 bitplane modes must use X%32 == 0)
952 Y % 16 == 0 to fit 8x16 font
955 Currently interlace and doubleline mode in var are ignored.
956 On SM124 and TV only the standard resolutions can be used.
959 /* Reject uninitialized mode */
960 if (!xres || !yres || !bpp)
963 if (mon_type == F_MON_SM && bpp != 1)
968 par->hw.falcon.f_shift = 0x400;
969 par->hw.falcon.st_shift = 0x200;
970 } else if (bpp <= 2) {
972 par->hw.falcon.f_shift = 0x000;
973 par->hw.falcon.st_shift = 0x100;
974 } else if (bpp <= 4) {
976 par->hw.falcon.f_shift = 0x000;
977 par->hw.falcon.st_shift = 0x000;
978 } else if (bpp <= 8) {
980 par->hw.falcon.f_shift = 0x010;
981 } else if (bpp <= 16) {
982 bpp = 16; /* packed pixel mode */
983 par->hw.falcon.f_shift = 0x100; /* hicolor, no overlay */
986 par->hw.falcon.bpp = bpp;
988 if (mon_type == F_MON_SM || DontCalcRes) {
989 /* Skip all calculations. VGA/TV/SC1224 only supported. */
990 struct fb_var_screeninfo *myvar = &atafb_predefined[0];
992 if (bpp > myvar->bits_per_pixel ||
993 var->xres > myvar->xres ||
994 var->yres > myvar->yres)
996 fbhw->get_par(par); /* Current par will be new par */
997 goto set_screen_base; /* Don't forget this */
1000 /* Only some fixed resolutions < 640x400 */
1003 else if (xres <= 640 && bpp != 16)
1007 else if (yres <= 240)
1009 else if (yres <= 400)
1012 /* 2 planes must use STE compatibility mode */
1013 par->hw.falcon.ste_mode = bpp == 2;
1014 par->hw.falcon.mono = bpp == 1;
1016 /* Total and visible scanline length must be a multiple of one longword,
1017 * this and the console fontwidth yields the alignment for xres and
1019 * TODO: this way "odd" fontheights are not supported
1021 * Special case in STE mode: blank and graphic positions don't align,
1022 * avoid trash at right margin
1024 if (par->hw.falcon.ste_mode)
1025 xres = (xres + 63) & ~63;
1027 xres = (xres + 31) & ~31;
1029 xres = (xres + 15) & ~15;
1031 yres = (yres + 15) & ~15;
1033 yres = (yres + 7) & ~7;
1035 if (xres_virtual < xres)
1036 xres_virtual = xres;
1038 xres_virtual = (xres_virtual + 31) & ~31;
1040 xres_virtual = (xres_virtual + 15) & ~15;
1042 if (yres_virtual <= 0)
1044 else if (yres_virtual < yres)
1045 yres_virtual = yres;
1047 /* backward bug-compatibility */
1048 if (var->pixclock > 1)
1051 par->hw.falcon.line_width = bpp * xres / 16;
1052 par->hw.falcon.line_offset = bpp * (xres_virtual - xres) / 16;
1054 /* single or double pixel width */
1055 xstretch = (xres < 640) ? 2 : 1;
1057 #if 0 /* SM124 supports only 640x400, this is rejected above */
1058 if (mon_type == F_MON_SM) {
1059 if (xres != 640 && yres != 400)
1063 /* SM124-mode is special */
1064 par->hw.falcon.ste_mode = 1;
1065 par->hw.falcon.f_shift = 0x000;
1066 par->hw.falcon.st_shift = 0x200;
1067 left_margin = hsync_len = 128 / plen;
1069 /* TODO set all margins */
1072 if (mon_type == F_MON_SC || mon_type == F_MON_TV) {
1073 plen = 2 * xstretch;
1074 if (var->pixclock > f32.t * plen)
1079 if (var->pixclock == 0) {
1080 /* set some minimal margins which center the screen */
1083 hsync_len = pclock->hsync / plen;
1086 vsync_len = interlace ? 3 : 4;
1088 left_margin = var->left_margin;
1089 right_margin = var->right_margin;
1090 hsync_len = var->hsync_len;
1091 upper_margin = var->upper_margin;
1092 lower_margin = var->lower_margin;
1093 vsync_len = var->vsync_len;
1094 if (var->vmode & FB_VMODE_INTERLACED) {
1095 upper_margin = (upper_margin + 1) / 2;
1096 lower_margin = (lower_margin + 1) / 2;
1097 vsync_len = (vsync_len + 1) / 2;
1098 } else if (var->vmode & FB_VMODE_DOUBLE) {
1104 } else { /* F_MON_VGA */
1106 xstretch = 2; /* Double pixel width only for hicolor */
1107 /* Default values are used for vert./hor. timing if no pixelclock given. */
1108 if (var->pixclock == 0) {
1111 /* Choose master pixelclock depending on hor. timing */
1112 plen = 1 * xstretch;
1113 if ((plen * xres + f25.right + f25.hsync + f25.left) *
1114 fb_info.monspecs.hfmin < f25.f)
1116 else if ((plen * xres + f32.right + f32.hsync +
1117 f32.left) * fb_info.monspecs.hfmin < f32.f)
1119 else if ((plen * xres + fext.right + fext.hsync +
1120 fext.left) * fb_info.monspecs.hfmin < fext.f &&
1126 left_margin = pclock->left / plen;
1127 right_margin = pclock->right / plen;
1128 hsync_len = pclock->hsync / plen;
1129 linesize = left_margin + xres + right_margin + hsync_len;
1134 /* Choose largest pixelclock <= wanted clock */
1136 unsigned long pcl = ULONG_MAX;
1138 for (i = 1; i <= 4; i *= 2) {
1139 if (f25.t * i >= var->pixclock &&
1144 if (f32.t * i >= var->pixclock &&
1149 if (fext.t && fext.t * i >= var->pixclock &&
1157 plen = pcl / pclock->t;
1159 left_margin = var->left_margin;
1160 right_margin = var->right_margin;
1161 hsync_len = var->hsync_len;
1162 upper_margin = var->upper_margin;
1163 lower_margin = var->lower_margin;
1164 vsync_len = var->vsync_len;
1165 /* Internal unit is [single lines per (half-)frame] */
1166 if (var->vmode & FB_VMODE_INTERLACED) {
1167 /* # lines in half frame */
1168 /* External unit is [lines per full frame] */
1169 upper_margin = (upper_margin + 1) / 2;
1170 lower_margin = (lower_margin + 1) / 2;
1171 vsync_len = (vsync_len + 1) / 2;
1172 } else if (var->vmode & FB_VMODE_DOUBLE) {
1173 /* External unit is [double lines per frame] */
1179 if (pclock == &fext)
1180 longoffset = 1; /* VIDEL doesn't synchronize on short offset */
1182 /* Is video bus bandwidth (32MB/s) too low for this resolution? */
1183 /* this is definitely wrong if bus clock != 32MHz */
1184 if (pclock->f / plen / 8 * bpp > 32000000L)
1190 /* include sync lengths in right/lower margin for all calculations */
1191 right_margin += hsync_len;
1192 lower_margin += vsync_len;
1194 /* ! In all calculations of margins we use # of lines in half frame
1195 * (which is a full frame in non-interlace mode), so we can switch
1196 * between interlace and non-interlace without messing around
1200 /* Set base_offset 128 and video bus width */
1201 par->hw.falcon.vid_control = mon_type | f030_bus_width;
1203 par->hw.falcon.vid_control |= VCO_SHORTOFFS; /* base_offset 64 */
1204 if (var->sync & FB_SYNC_HOR_HIGH_ACT)
1205 par->hw.falcon.vid_control |= VCO_HSYPOS;
1206 if (var->sync & FB_SYNC_VERT_HIGH_ACT)
1207 par->hw.falcon.vid_control |= VCO_VSYPOS;
1209 par->hw.falcon.vid_control |= pclock->control_mask;
1210 /* External or internal clock */
1211 par->hw.falcon.sync = pclock->sync_mask | 0x2;
1212 /* Pixellength and prescale */
1213 par->hw.falcon.vid_mode = (2 / plen) << 2;
1215 par->hw.falcon.vid_mode |= VMO_DOUBLE;
1217 par->hw.falcon.vid_mode |= VMO_INTER;
1219 /*********************
1220 * Horizontal timing: unit = [master clock cycles]
1221 * unit of hxx-registers: [master clock cycles * prescale]
1222 * Hxx-registers are 9 bit wide
1224 * 1 line = ((hht + 2) * 2 * prescale) clock cycles
1226 * graphic output = hdb & 0x200 ?
1227 * ((hht + 2) * 2 - hdb + hde) * prescale - hdboff + hdeoff:
1228 * (hht + 2 - hdb + hde) * prescale - hdboff + hdeoff
1229 * (this must be a multiple of plen*128/bpp, on VGA pixels
1230 * to the right may be cut off with a bigger right margin)
1232 * start of graphics relative to start of 1st halfline = hdb & 0x200 ?
1233 * (hdb - hht - 2) * prescale + hdboff :
1234 * hdb * prescale + hdboff
1236 * end of graphics relative to start of 1st halfline =
1237 * (hde + hht + 2) * prescale + hdeoff
1238 *********************/
1239 /* Calculate VIDEL registers */
1241 prescale = hxx_prescale(&par->hw.falcon);
1242 base_off = par->hw.falcon.vid_control & VCO_SHORTOFFS ? 64 : 128;
1244 /* Offsets depend on video mode */
1245 /* Offsets are in clock cycles, divide by prescale to
1246 * calculate hd[be]-registers
1248 if (par->hw.falcon.f_shift & 0x100) {
1251 hdb_off = (base_off + 16 * plen) + prescale;
1254 hde_off = ((128 / bpp + 2) * plen);
1255 if (par->hw.falcon.ste_mode)
1256 hdb_off = (64 + base_off + (128 / bpp + 2) * plen) + prescale;
1258 hdb_off = (base_off + (128 / bpp + 18) * plen) + prescale;
1261 gstart = (prescale / 2 + plen * left_margin) / prescale;
1262 /* gend1 is for hde (gend-gstart multiple of align), shifter's xres */
1263 gend1 = gstart + roundup(xres, align) * plen / prescale;
1264 /* gend2 is for hbb, visible xres (rest to gend1 is cut off by hblank) */
1265 gend2 = gstart + xres * plen / prescale;
1266 par->HHT = plen * (left_margin + xres + right_margin) /
1268 /* par->HHT = (gend2 + plen * right_margin / prescale) / 2 - 2;*/
1270 par->HDB = gstart - hdb_off / prescale;
1273 par->HDB += par->HHT + 2 + 0x200;
1274 par->HDE = gend1 - par->HHT - 2 - hde_off / prescale;
1275 par->HBB = gend2 - par->HHT - 2;
1277 /* One more Videl constraint: data fetch of two lines must not overlap */
1278 if ((par->HDB & 0x200) && (par->HDB & ~0x200) - par->HDE <= 5) {
1279 /* if this happens increase margins, decrease hfreq. */
1282 if (hde_off % prescale)
1283 par->HBB++; /* compensate for non matching hde and hbb */
1284 par->HSS = par->HHT + 2 - plen * hsync_len / prescale;
1285 if (par->HSS < par->HBB)
1286 par->HSS = par->HBB;
1289 /* check hor. frequency */
1290 hfreq = pclock->f / ((par->HHT + 2) * prescale * 2);
1291 if (hfreq > fb_info.monspecs.hfmax && mon_type != F_MON_VGA) {
1292 /* ++guenther: ^^^^^^^^^^^^^^^^^^^ can't remember why I did this */
1293 /* Too high -> enlarge margin */
1298 if (hfreq > fb_info.monspecs.hfmax || hfreq < fb_info.monspecs.hfmin)
1302 /* All Vxx must be odd in non-interlace, since frame starts in the middle
1303 * of the first displayed line!
1304 * One frame consists of VFT+1 half lines. VFT+1 must be even in
1305 * non-interlace, odd in interlace mode for synchronisation.
1306 * Vxx-registers are 11 bit wide
1308 par->VBE = (upper_margin * 2 + 1); /* must begin on odd halfline */
1309 par->VDB = par->VBE;
1314 par->VDE <<= 1; /* VDE now half lines per (half-)frame */
1315 par->VDE += par->VDB;
1316 par->VBB = par->VDE;
1317 par->VFT = par->VBB + (lower_margin * 2 - 1) - 1;
1318 par->VSS = par->VFT + 1 - (vsync_len * 2 - 1);
1319 /* vbb,vss,vft must be even in interlace mode */
1326 /* V-frequency check, hope I didn't create any loop here. */
1327 /* Interlace and doubleline are mutually exclusive. */
1328 vfreq = (hfreq * 2) / (par->VFT + 1);
1329 if (vfreq > fb_info.monspecs.vfmax && !doubleline && !interlace) {
1330 /* Too high -> try again with doubleline */
1333 } else if (vfreq < fb_info.monspecs.vfmin && !interlace && !doubleline) {
1334 /* Too low -> try again with interlace */
1337 } else if (vfreq < fb_info.monspecs.vfmin && doubleline) {
1338 /* Doubleline too low -> clear doubleline and enlarge margins */
1342 (hfreq * 2) / (par->VFT + 1 + 4 * lines - 2 * yres) >
1343 fb_info.monspecs.vfmax;
1346 upper_margin += lines;
1347 lower_margin += lines;
1349 } else if (vfreq > fb_info.monspecs.vfmax && doubleline) {
1350 /* Doubleline too high -> enlarge margins */
1353 (hfreq * 2) / (par->VFT + 1 + 4 * lines) >
1354 fb_info.monspecs.vfmax;
1357 upper_margin += lines;
1358 lower_margin += lines;
1360 } else if (vfreq > fb_info.monspecs.vfmax && interlace) {
1361 /* Interlace, too high -> enlarge margins */
1364 (hfreq * 2) / (par->VFT + 1 + 4 * lines) >
1365 fb_info.monspecs.vfmax;
1368 upper_margin += lines;
1369 lower_margin += lines;
1371 } else if (vfreq < fb_info.monspecs.vfmin ||
1372 vfreq > fb_info.monspecs.vfmax)
1376 linelen = xres_virtual * bpp / 8;
1377 if (yres_virtual * linelen > screen_len && screen_len)
1379 if (yres * linelen > screen_len && screen_len)
1381 if (var->yoffset + yres > yres_virtual && yres_virtual)
1383 par->yres_virtual = yres_virtual;
1384 par->screen_base = screen_base + var->yoffset * linelen;
1385 par->hw.falcon.xoffset = 0;
1387 par->next_line = linelen;
1392 static int falcon_encode_var(struct fb_var_screeninfo *var,
1393 struct atafb_par *par)
1395 /* !!! only for VGA !!! */
1398 int hdb_off, hde_off, base_off;
1399 struct falcon_hw *hw = &par->hw.falcon;
1401 memset(var, 0, sizeof(struct fb_var_screeninfo));
1402 /* possible frequencies: 25.175 or 32MHz */
1403 var->pixclock = hw->sync & 0x1 ? fext.t :
1404 hw->vid_control & VCO_CLOCK25 ? f25.t : f32.t;
1410 if (hw->vid_control & VCO_HSYPOS)
1411 var->sync |= FB_SYNC_HOR_HIGH_ACT;
1412 if (hw->vid_control & VCO_VSYPOS)
1413 var->sync |= FB_SYNC_VERT_HIGH_ACT;
1415 var->vmode = FB_VMODE_NONINTERLACED;
1416 if (hw->vid_mode & VMO_INTER)
1417 var->vmode |= FB_VMODE_INTERLACED;
1418 if (hw->vid_mode & VMO_DOUBLE)
1419 var->vmode |= FB_VMODE_DOUBLE;
1421 /* visible y resolution:
1422 * Graphics display starts at line VDB and ends at line
1423 * VDE. If interlace mode off unit of VC-registers is
1424 * half lines, else lines.
1426 var->yres = hw->vde - hw->vdb;
1427 if (!(var->vmode & FB_VMODE_INTERLACED))
1429 if (var->vmode & FB_VMODE_DOUBLE)
1433 * to get bpp, we must examine f_shift and st_shift.
1434 * f_shift is valid if any of bits no. 10, 8 or 4
1435 * is set. Priority in f_shift is: 10 ">" 8 ">" 4, i.e.
1436 * if bit 10 set then bit 8 and bit 4 don't care...
1437 * If all these bits are 0 get display depth from st_shift
1438 * (as for ST and STE)
1440 if (hw->f_shift & 0x400) /* 2 colors */
1441 var->bits_per_pixel = 1;
1442 else if (hw->f_shift & 0x100) /* hicolor */
1443 var->bits_per_pixel = 16;
1444 else if (hw->f_shift & 0x010) /* 8 bitplanes */
1445 var->bits_per_pixel = 8;
1446 else if (hw->st_shift == 0)
1447 var->bits_per_pixel = 4;
1448 else if (hw->st_shift == 0x100)
1449 var->bits_per_pixel = 2;
1450 else /* if (hw->st_shift == 0x200) */
1451 var->bits_per_pixel = 1;
1453 var->xres = hw->line_width * 16 / var->bits_per_pixel;
1454 var->xres_virtual = var->xres + hw->line_offset * 16 / var->bits_per_pixel;
1456 var->xres_virtual += 16;
1458 if (var->bits_per_pixel == 16) {
1459 var->red.offset = 11;
1460 var->red.length = 5;
1461 var->red.msb_right = 0;
1462 var->green.offset = 5;
1463 var->green.length = 6;
1464 var->green.msb_right = 0;
1465 var->blue.offset = 0;
1466 var->blue.length = 5;
1467 var->blue.msb_right = 0;
1469 var->red.offset = 0;
1470 var->red.length = hw->ste_mode ? 4 : 6;
1471 if (var->red.length > var->bits_per_pixel)
1472 var->red.length = var->bits_per_pixel;
1473 var->red.msb_right = 0;
1475 var->blue = var->green = var->red;
1477 var->transp.offset = 0;
1478 var->transp.length = 0;
1479 var->transp.msb_right = 0;
1481 linelen = var->xres_virtual * var->bits_per_pixel / 8;
1483 if (par->yres_virtual)
1484 var->yres_virtual = par->yres_virtual;
1486 /* yres_virtual == 0 means use maximum */
1487 var->yres_virtual = screen_len / linelen;
1490 var->yres_virtual = 2 * var->yres;
1492 var->yres_virtual = var->yres + hwscroll * 16;
1494 var->xoffset = 0; /* TODO change this */
1497 prescale = hxx_prescale(hw);
1498 plen = 4 >> (hw->vid_mode >> 2 & 0x3);
1499 base_off = hw->vid_control & VCO_SHORTOFFS ? 64 : 128;
1500 if (hw->f_shift & 0x100) {
1502 hdb_off = (base_off + 16 * plen) + prescale;
1504 hde_off = ((128 / var->bits_per_pixel + 2) * plen);
1506 hdb_off = (64 + base_off + (128 / var->bits_per_pixel + 2) * plen)
1509 hdb_off = (base_off + (128 / var->bits_per_pixel + 18) * plen)
1513 /* Right margin includes hsync */
1514 var->left_margin = hdb_off + prescale * ((hw->hdb & 0x1ff) -
1515 (hw->hdb & 0x200 ? 2 + hw->hht : 0));
1516 if (hw->ste_mode || mon_type != F_MON_VGA)
1517 var->right_margin = prescale * (hw->hht + 2 - hw->hde) - hde_off;
1519 /* can't use this in ste_mode, because hbb is +1 off */
1520 var->right_margin = prescale * (hw->hht + 2 - hw->hbb);
1521 var->hsync_len = prescale * (hw->hht + 2 - hw->hss);
1523 /* Lower margin includes vsync */
1524 var->upper_margin = hw->vdb / 2; /* round down to full lines */
1525 var->lower_margin = (hw->vft + 1 - hw->vde + 1) / 2; /* round up */
1526 var->vsync_len = (hw->vft + 1 - hw->vss + 1) / 2; /* round up */
1527 if (var->vmode & FB_VMODE_INTERLACED) {
1528 var->upper_margin *= 2;
1529 var->lower_margin *= 2;
1530 var->vsync_len *= 2;
1531 } else if (var->vmode & FB_VMODE_DOUBLE) {
1532 var->upper_margin = (var->upper_margin + 1) / 2;
1533 var->lower_margin = (var->lower_margin + 1) / 2;
1534 var->vsync_len = (var->vsync_len + 1) / 2;
1537 var->pixclock *= plen;
1538 var->left_margin /= plen;
1539 var->right_margin /= plen;
1540 var->hsync_len /= plen;
1542 var->right_margin -= var->hsync_len;
1543 var->lower_margin -= var->vsync_len;
1546 var->yoffset = (par->screen_base - screen_base) / linelen;
1549 var->nonstd = 0; /* what is this for? */
1554 static int f_change_mode;
1555 static struct falcon_hw f_new_mode;
1556 static int f_pan_display;
1558 static void falcon_get_par(struct atafb_par *par)
1561 struct falcon_hw *hw = &par->hw.falcon;
1563 hw->line_width = shifter_f030.scn_width;
1564 hw->line_offset = shifter_f030.off_next;
1565 hw->st_shift = videl.st_shift & 0x300;
1566 hw->f_shift = videl.f_shift;
1567 hw->vid_control = videl.control;
1568 hw->vid_mode = videl.mode;
1569 hw->sync = shifter.syncmode & 0x1;
1570 hw->xoffset = videl.xoffset & 0xf;
1571 hw->hht = videl.hht;
1572 hw->hbb = videl.hbb;
1573 hw->hbe = videl.hbe;
1574 hw->hdb = videl.hdb;
1575 hw->hde = videl.hde;
1576 hw->hss = videl.hss;
1577 hw->vft = videl.vft;
1578 hw->vbb = videl.vbb;
1579 hw->vbe = videl.vbe;
1580 hw->vdb = videl.vdb;
1581 hw->vde = videl.vde;
1582 hw->vss = videl.vss;
1584 addr = (shifter.bas_hi & 0xff) << 16 |
1585 (shifter.bas_md & 0xff) << 8 |
1586 (shifter.bas_lo & 0xff);
1587 par->screen_base = phys_to_virt(addr);
1589 /* derived parameters */
1590 hw->ste_mode = (hw->f_shift & 0x510) == 0 && hw->st_shift == 0x100;
1591 hw->mono = (hw->f_shift & 0x400) ||
1592 ((hw->f_shift & 0x510) == 0 && hw->st_shift == 0x200);
1595 static void falcon_set_par(struct atafb_par *par)
1599 /* only set screen_base if really necessary */
1600 if (current_par.screen_base != par->screen_base)
1601 fbhw->set_screen_base(par->screen_base);
1603 /* Don't touch any other registers if we keep the default resolution */
1607 /* Tell vbl-handler to change video mode.
1608 * We change modes only on next VBL, to avoid desynchronisation
1609 * (a shift to the right and wrap around by a random number of pixels
1610 * in all monochrome modes).
1611 * This seems to work on my Falcon.
1613 f_new_mode = par->hw.falcon;
1617 static irqreturn_t falcon_vbl_switcher(int irq, void *dummy)
1619 struct falcon_hw *hw = &f_new_mode;
1621 if (f_change_mode) {
1624 if (hw->sync & 0x1) {
1625 /* Enable external pixelclock. This code only for ScreenWonder */
1626 *(volatile unsigned short *)0xffff9202 = 0xffbf;
1628 /* Turn off external clocks. Read sets all output bits to 1. */
1629 *(volatile unsigned short *)0xffff9202;
1631 shifter.syncmode = hw->sync;
1633 videl.hht = hw->hht;
1634 videl.hbb = hw->hbb;
1635 videl.hbe = hw->hbe;
1636 videl.hdb = hw->hdb;
1637 videl.hde = hw->hde;
1638 videl.hss = hw->hss;
1639 videl.vft = hw->vft;
1640 videl.vbb = hw->vbb;
1641 videl.vbe = hw->vbe;
1642 videl.vdb = hw->vdb;
1643 videl.vde = hw->vde;
1644 videl.vss = hw->vss;
1646 videl.f_shift = 0; /* write enables Falcon palette, 0: 4 planes */
1648 videl.st_shift = hw->st_shift; /* write enables STE palette */
1651 * set st_shift 0, so we can tell the screen-depth if f_shift == 0.
1652 * Writing 0 to f_shift enables 4 plane Falcon mode but
1653 * doesn't set st_shift. st_shift != 0 (!= 4planes) is impossible
1654 * with Falcon palette.
1657 /* now back to Falcon palette mode */
1658 videl.f_shift = hw->f_shift;
1660 /* writing to st_shift changed scn_width and vid_mode */
1661 videl.xoffset = hw->xoffset;
1662 shifter_f030.scn_width = hw->line_width;
1663 shifter_f030.off_next = hw->line_offset;
1664 videl.control = hw->vid_control;
1665 videl.mode = hw->vid_mode;
1667 if (f_pan_display) {
1669 videl.xoffset = current_par.hw.falcon.xoffset;
1670 shifter_f030.off_next = current_par.hw.falcon.line_offset;
1675 static int falcon_pan_display(struct fb_var_screeninfo *var,
1676 struct fb_info *info)
1678 struct atafb_par *par = (struct atafb_par *)info->par;
1681 int bpp = info->var.bits_per_pixel;
1684 var->xoffset = up(var->xoffset, 32);
1686 par->hw.falcon.xoffset = var->xoffset & 15;
1688 par->hw.falcon.xoffset = 0;
1689 var->xoffset = up(var->xoffset, 2);
1691 par->hw.falcon.line_offset = bpp *
1692 (info->var.xres_virtual - info->var.xres) / 16;
1693 if (par->hw.falcon.xoffset)
1694 par->hw.falcon.line_offset -= bpp;
1695 xoffset = var->xoffset - par->hw.falcon.xoffset;
1697 par->screen_base = screen_base +
1698 (var->yoffset * info->var.xres_virtual + xoffset) * bpp / 8;
1699 if (fbhw->set_screen_base)
1700 fbhw->set_screen_base(par->screen_base);
1702 return -EINVAL; /* shouldn't happen */
1707 static int falcon_setcolreg(unsigned int regno, unsigned int red,
1708 unsigned int green, unsigned int blue,
1709 unsigned int transp, struct fb_info *info)
1713 f030_col[regno] = (((red & 0xfc00) << 16) |
1714 ((green & 0xfc00) << 8) |
1715 ((blue & 0xfc00) >> 8));
1717 shifter_tt.color_reg[regno] =
1718 (((red & 0xe000) >> 13) | ((red & 0x1000) >> 12) << 8) |
1719 (((green & 0xe000) >> 13) | ((green & 0x1000) >> 12) << 4) |
1720 ((blue & 0xe000) >> 13) | ((blue & 0x1000) >> 12);
1722 ((u32 *)info->pseudo_palette)[regno] = ((red & 0xf800) |
1723 ((green & 0xfc00) >> 5) |
1724 ((blue & 0xf800) >> 11));
1730 static int falcon_blank(int blank_mode)
1732 /* ++guenther: we can switch off graphics by changing VDB and VDE,
1733 * so VIDEL doesn't hog the bus while saving.
1734 * (this may affect usleep()).
1736 int vdb, vss, hbe, hss;
1738 if (mon_type == F_MON_SM) /* this doesn't work on SM124 */
1741 vdb = current_par.VDB;
1742 vss = current_par.VSS;
1743 hbe = current_par.HBE;
1744 hss = current_par.HSS;
1746 if (blank_mode >= 1) {
1747 /* disable graphics output (this speeds up the CPU) ... */
1748 vdb = current_par.VFT + 1;
1749 /* ... and blank all lines */
1750 hbe = current_par.HHT + 2;
1752 /* use VESA suspend modes on VGA monitors */
1753 if (mon_type == F_MON_VGA) {
1754 if (blank_mode == 2 || blank_mode == 4)
1755 vss = current_par.VFT + 1;
1756 if (blank_mode == 3 || blank_mode == 4)
1757 hss = current_par.HHT + 2;
1768 static int falcon_detect(void)
1770 struct atafb_par par;
1773 /* Determine connected monitor and set monitor parameters */
1774 fhw = *(unsigned char *)0xffff8006;
1775 mon_type = fhw >> 6 & 0x3;
1776 /* bit 1 of fhw: 1=32 bit ram bus, 0=16 bit */
1777 f030_bus_width = fhw << 6 & 0x80;
1780 fb_info.monspecs.vfmin = 70;
1781 fb_info.monspecs.vfmax = 72;
1782 fb_info.monspecs.hfmin = 35713;
1783 fb_info.monspecs.hfmax = 35715;
1788 fb_info.monspecs.vfmin = 49; /* not 50, since TOS defaults to 49.9x Hz */
1789 fb_info.monspecs.vfmax = 60;
1790 fb_info.monspecs.hfmin = 15620;
1791 fb_info.monspecs.hfmax = 15755;
1794 /* initialize hsync-len */
1795 f25.hsync = h_syncs[mon_type] / f25.t;
1796 f32.hsync = h_syncs[mon_type] / f32.t;
1798 fext.hsync = h_syncs[mon_type] / fext.t;
1800 falcon_get_par(&par);
1801 falcon_encode_var(&atafb_predefined[0], &par);
1803 /* Detected mode is always the "autodetect" slot */
1807 #endif /* ATAFB_FALCON */
1809 /* ------------------- ST(E) specific functions ---------------------- */
1813 static int stste_encode_fix(struct fb_fix_screeninfo *fix,
1814 struct atafb_par *par)
1818 strcpy(fix->id, "Atari Builtin");
1819 fix->smem_start = (unsigned long)real_screen_base;
1820 fix->smem_len = screen_len;
1821 fix->type = FB_TYPE_INTERLEAVED_PLANES;
1823 fix->visual = FB_VISUAL_PSEUDOCOLOR;
1824 mode = par->hw.st.mode & 3;
1825 if (mode == ST_HIGH) {
1826 fix->type = FB_TYPE_PACKED_PIXELS;
1828 fix->visual = FB_VISUAL_MONO10;
1830 if (ATARIHW_PRESENT(EXTD_SHIFTER)) {
1838 fix->line_length = par->next_line;
1839 fix->accel = FB_ACCEL_ATARIBLITT;
1843 static int stste_decode_var(struct fb_var_screeninfo *var,
1844 struct atafb_par *par)
1846 int xres = var->xres;
1847 int yres = var->yres;
1848 int bpp = var->bits_per_pixel;
1850 int yres_virtual = var->yres_virtual;
1853 if (bpp > 1 || xres > sttt_xres || yres > st_yres)
1855 par->hw.st.mode = ST_HIGH;
1860 if (bpp > 4 || xres > sttt_xres || yres > st_yres)
1863 if (xres > sttt_xres / 2 || yres > st_yres / 2)
1865 par->hw.st.mode = ST_LOW;
1866 xres = sttt_xres / 2;
1869 } else if (bpp > 1) {
1870 if (xres > sttt_xres || yres > st_yres / 2)
1872 par->hw.st.mode = ST_MID;
1879 if (yres_virtual <= 0)
1881 else if (yres_virtual < yres)
1882 yres_virtual = yres;
1883 if (var->sync & FB_SYNC_EXT)
1884 par->hw.st.sync = (par->hw.st.sync & ~1) | 1;
1886 par->hw.st.sync = (par->hw.st.sync & ~1);
1887 linelen = xres * bpp / 8;
1888 if (yres_virtual * linelen > screen_len && screen_len)
1890 if (yres * linelen > screen_len && screen_len)
1892 if (var->yoffset + yres > yres_virtual && yres_virtual)
1894 par->yres_virtual = yres_virtual;
1895 par->screen_base = screen_base + var->yoffset * linelen;
1896 par->next_line = linelen;
1900 static int stste_encode_var(struct fb_var_screeninfo *var,
1901 struct atafb_par *par)
1904 memset(var, 0, sizeof(struct fb_var_screeninfo));
1905 var->red.offset = 0;
1906 var->red.length = ATARIHW_PRESENT(EXTD_SHIFTER) ? 4 : 3;
1907 var->red.msb_right = 0;
1910 var->pixclock = 31041;
1911 var->left_margin = 120; /* these are incorrect */
1912 var->right_margin = 100;
1913 var->upper_margin = 8;
1914 var->lower_margin = 16;
1915 var->hsync_len = 140;
1916 var->vsync_len = 30;
1921 if (!(par->hw.st.sync & 1))
1924 var->sync = FB_SYNC_EXT;
1926 switch (par->hw.st.mode & 3) {
1928 var->xres = sttt_xres / 2;
1929 var->yres = st_yres / 2;
1930 var->bits_per_pixel = 4;
1933 var->xres = sttt_xres;
1934 var->yres = st_yres / 2;
1935 var->bits_per_pixel = 2;
1938 var->xres = sttt_xres;
1939 var->yres = st_yres;
1940 var->bits_per_pixel = 1;
1943 var->blue = var->green = var->red;
1944 var->transp.offset = 0;
1945 var->transp.length = 0;
1946 var->transp.msb_right = 0;
1947 var->xres_virtual = sttt_xres_virtual;
1948 linelen = var->xres_virtual * var->bits_per_pixel / 8;
1949 ovsc_addlen = linelen * (sttt_yres_virtual - st_yres);
1952 var->yres_virtual = var->yres;
1953 else if (screen_len) {
1954 if (par->yres_virtual)
1955 var->yres_virtual = par->yres_virtual;
1957 /* yres_virtual == 0 means use maximum */
1958 var->yres_virtual = screen_len / linelen;
1961 var->yres_virtual = 2 * var->yres;
1963 var->yres_virtual = var->yres + hwscroll * 16;
1967 var->yoffset = (par->screen_base - screen_base) / linelen;
1972 var->vmode = FB_VMODE_NONINTERLACED;
1976 static void stste_get_par(struct atafb_par *par)
1979 par->hw.st.mode = shifter_tt.st_shiftmode;
1980 par->hw.st.sync = shifter.syncmode;
1981 addr = ((shifter.bas_hi & 0xff) << 16) |
1982 ((shifter.bas_md & 0xff) << 8);
1983 if (ATARIHW_PRESENT(EXTD_SHIFTER))
1984 addr |= (shifter.bas_lo & 0xff);
1985 par->screen_base = phys_to_virt(addr);
1988 static void stste_set_par(struct atafb_par *par)
1990 shifter_tt.st_shiftmode = par->hw.st.mode;
1991 shifter.syncmode = par->hw.st.sync;
1992 /* only set screen_base if really necessary */
1993 if (current_par.screen_base != par->screen_base)
1994 fbhw->set_screen_base(par->screen_base);
1997 static int stste_setcolreg(unsigned int regno, unsigned int red,
1998 unsigned int green, unsigned int blue,
1999 unsigned int transp, struct fb_info *info)
2006 if (ATARIHW_PRESENT(EXTD_SHIFTER))
2007 shifter_tt.color_reg[regno] =
2008 (((red & 0xe) >> 1) | ((red & 1) << 3) << 8) |
2009 (((green & 0xe) >> 1) | ((green & 1) << 3) << 4) |
2010 ((blue & 0xe) >> 1) | ((blue & 1) << 3);
2012 shifter_tt.color_reg[regno] =
2013 ((red & 0xe) << 7) |
2014 ((green & 0xe) << 3) |
2015 ((blue & 0xe) >> 1);
2019 static int stste_detect(void)
2021 struct atafb_par par;
2023 /* Determine the connected monitor: The DMA sound must be
2024 * disabled before reading the MFP GPIP, because the Sound
2025 * Done Signal and the Monochrome Detect are XORed together!
2027 if (ATARIHW_PRESENT(PCM_8BIT)) {
2028 tt_dmasnd.ctrl = DMASND_CTRL_OFF;
2029 udelay(20); /* wait a while for things to settle down */
2031 mono_moni = (st_mfp.par_dt_reg & 0x80) == 0;
2033 stste_get_par(&par);
2034 stste_encode_var(&atafb_predefined[0], &par);
2036 if (!ATARIHW_PRESENT(EXTD_SHIFTER))
2041 static void stste_set_screen_base(void *s_base)
2044 addr = virt_to_phys(s_base);
2045 /* Setup Screen Memory */
2046 shifter.bas_hi = (unsigned char)((addr & 0xff0000) >> 16);
2047 shifter.bas_md = (unsigned char)((addr & 0x00ff00) >> 8);
2048 if (ATARIHW_PRESENT(EXTD_SHIFTER))
2049 shifter.bas_lo = (unsigned char)(addr & 0x0000ff);
2052 #endif /* ATAFB_STE */
2054 /* Switching the screen size should be done during vsync, otherwise
2055 * the margins may get messed up. This is a well known problem of
2056 * the ST's video system.
2058 * Unfortunately there is hardly any way to find the vsync, as the
2059 * vertical blank interrupt is no longer in time on machines with
2060 * overscan type modifications.
2062 * We can, however, use Timer B to safely detect the black shoulder,
2063 * but then we've got to guess an appropriate delay to find the vsync.
2064 * This might not work on every machine.
2066 * martin_rogge @ ki.maus.de, 8th Aug 1995
2069 #define LINE_DELAY (mono_moni ? 30 : 70)
2070 #define SYNC_DELAY (mono_moni ? 1500 : 2000)
2072 /* SWITCH_ACIA may be used for Falcon (ScreenBlaster III internal!) */
2073 static void st_ovsc_switch(void)
2075 unsigned long flags;
2076 register unsigned char old, new;
2078 if (!(atari_switches & ATARI_SWITCH_OVSC_MASK))
2080 local_irq_save(flags);
2082 st_mfp.tim_ct_b = 0x10;
2083 st_mfp.active_edge |= 8;
2084 st_mfp.tim_ct_b = 0;
2085 st_mfp.tim_dt_b = 0xf0;
2086 st_mfp.tim_ct_b = 8;
2087 while (st_mfp.tim_dt_b > 1) /* TOS does it this way, don't ask why */
2089 new = st_mfp.tim_dt_b;
2093 new = st_mfp.tim_dt_b;
2094 } while (old != new);
2095 st_mfp.tim_ct_b = 0x10;
2098 if (atari_switches & ATARI_SWITCH_OVSC_IKBD)
2099 acia.key_ctrl = ACIA_DIV64 | ACIA_D8N1S | ACIA_RHTID | ACIA_RIE;
2100 if (atari_switches & ATARI_SWITCH_OVSC_MIDI)
2101 acia.mid_ctrl = ACIA_DIV16 | ACIA_D8N1S | ACIA_RHTID;
2102 if (atari_switches & (ATARI_SWITCH_OVSC_SND6|ATARI_SWITCH_OVSC_SND7)) {
2103 sound_ym.rd_data_reg_sel = 14;
2104 sound_ym.wd_data = sound_ym.rd_data_reg_sel |
2105 ((atari_switches & ATARI_SWITCH_OVSC_SND6) ? 0x40:0) |
2106 ((atari_switches & ATARI_SWITCH_OVSC_SND7) ? 0x80:0);
2108 local_irq_restore(flags);
2111 /* ------------------- External Video ---------------------- */
2115 static int ext_encode_fix(struct fb_fix_screeninfo *fix, struct atafb_par *par)
2117 strcpy(fix->id, "Unknown Extern");
2118 fix->smem_start = (unsigned long)external_addr;
2119 fix->smem_len = PAGE_ALIGN(external_len);
2120 if (external_depth == 1) {
2121 fix->type = FB_TYPE_PACKED_PIXELS;
2122 /* The letters 'n' and 'i' in the "atavideo=external:" stand
2123 * for "normal" and "inverted", rsp., in the monochrome case */
2125 (external_pmode == FB_TYPE_INTERLEAVED_PLANES ||
2126 external_pmode == FB_TYPE_PACKED_PIXELS) ?
2127 FB_VISUAL_MONO10 : FB_VISUAL_MONO01;
2129 /* Use STATIC if we don't know how to access color registers */
2130 int visual = external_vgaiobase ?
2131 FB_VISUAL_PSEUDOCOLOR :
2132 FB_VISUAL_STATIC_PSEUDOCOLOR;
2133 switch (external_pmode) {
2134 case -1: /* truecolor */
2135 fix->type = FB_TYPE_PACKED_PIXELS;
2136 fix->visual = FB_VISUAL_TRUECOLOR;
2138 case FB_TYPE_PACKED_PIXELS:
2139 fix->type = FB_TYPE_PACKED_PIXELS;
2140 fix->visual = visual;
2142 case FB_TYPE_PLANES:
2143 fix->type = FB_TYPE_PLANES;
2144 fix->visual = visual;
2146 case FB_TYPE_INTERLEAVED_PLANES:
2147 fix->type = FB_TYPE_INTERLEAVED_PLANES;
2149 fix->visual = visual;
2156 fix->line_length = par->next_line;
2160 static int ext_decode_var(struct fb_var_screeninfo *var, struct atafb_par *par)
2162 struct fb_var_screeninfo *myvar = &atafb_predefined[0];
2164 if (var->bits_per_pixel > myvar->bits_per_pixel ||
2165 var->xres > myvar->xres ||
2166 var->xres_virtual > myvar->xres_virtual ||
2167 var->yres > myvar->yres ||
2172 par->next_line = external_xres_virtual * external_depth / 8;
2176 static int ext_encode_var(struct fb_var_screeninfo *var, struct atafb_par *par)
2178 memset(var, 0, sizeof(struct fb_var_screeninfo));
2179 var->red.offset = 0;
2180 var->red.length = (external_pmode == -1) ? external_depth / 3 :
2181 (external_vgaiobase ? external_bitspercol : 0);
2182 var->red.msb_right = 0;
2185 var->pixclock = 31041;
2186 var->left_margin = 120; /* these are surely incorrect */
2187 var->right_margin = 100;
2188 var->upper_margin = 8;
2189 var->lower_margin = 16;
2190 var->hsync_len = 140;
2191 var->vsync_len = 30;
2198 var->xres = external_xres;
2199 var->yres = external_yres;
2200 var->xres_virtual = external_xres_virtual;
2201 var->bits_per_pixel = external_depth;
2203 var->blue = var->green = var->red;
2204 var->transp.offset = 0;
2205 var->transp.length = 0;
2206 var->transp.msb_right = 0;
2207 var->yres_virtual = var->yres;
2212 var->vmode = FB_VMODE_NONINTERLACED;
2216 static void ext_get_par(struct atafb_par *par)
2218 par->screen_base = external_addr;
2221 static void ext_set_par(struct atafb_par *par)
2225 #define OUTB(port,val) \
2226 *((unsigned volatile char *) ((port)+external_vgaiobase)) = (val)
2228 (*((unsigned volatile char *) ((port)+external_vgaiobase)))
2231 unsigned char tmp = INB(0x3da); \
2235 static int ext_setcolreg(unsigned int regno, unsigned int red,
2236 unsigned int green, unsigned int blue,
2237 unsigned int transp, struct fb_info *info)
2239 unsigned char colmask = (1 << external_bitspercol) - 1;
2241 if (!external_vgaiobase)
2247 switch (external_card_type) {
2251 OUTB(0x3c9, red & colmask);
2253 OUTB(0x3c9, green & colmask);
2255 OUTB(0x3c9, blue & colmask);
2260 OUTB((MV300_reg[regno] << 2) + 1, red);
2261 OUTB((MV300_reg[regno] << 2) + 1, green);
2262 OUTB((MV300_reg[regno] << 2) + 1, blue);
2270 static int ext_detect(void)
2272 struct fb_var_screeninfo *myvar = &atafb_predefined[0];
2273 struct atafb_par dummy_par;
2275 myvar->xres = external_xres;
2276 myvar->xres_virtual = external_xres_virtual;
2277 myvar->yres = external_yres;
2278 myvar->bits_per_pixel = external_depth;
2279 ext_encode_var(myvar, &dummy_par);
2283 #endif /* ATAFB_EXT */
2285 /* ------ This is the same for most hardware types -------- */
2287 static void set_screen_base(void *s_base)
2291 addr = virt_to_phys(s_base);
2292 /* Setup Screen Memory */
2293 shifter.bas_hi = (unsigned char)((addr & 0xff0000) >> 16);
2294 shifter.bas_md = (unsigned char)((addr & 0x00ff00) >> 8);
2295 shifter.bas_lo = (unsigned char)(addr & 0x0000ff);
2298 static int pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
2300 struct atafb_par *par = (struct atafb_par *)info->par;
2302 if (!fbhw->set_screen_base ||
2303 (!ATARIHW_PRESENT(EXTD_SHIFTER) && var->xoffset))
2305 var->xoffset = up(var->xoffset, 16);
2306 par->screen_base = screen_base +
2307 (var->yoffset * info->var.xres_virtual + var->xoffset)
2308 * info->var.bits_per_pixel / 8;
2309 fbhw->set_screen_base(par->screen_base);
2313 /* ------------ Interfaces to hardware functions ------------ */
2316 static struct fb_hwswitch tt_switch = {
2317 .detect = tt_detect,
2318 .encode_fix = tt_encode_fix,
2319 .decode_var = tt_decode_var,
2320 .encode_var = tt_encode_var,
2321 .get_par = tt_get_par,
2322 .set_par = tt_set_par,
2323 .set_screen_base = set_screen_base,
2324 .pan_display = pan_display,
2329 static struct fb_hwswitch falcon_switch = {
2330 .detect = falcon_detect,
2331 .encode_fix = falcon_encode_fix,
2332 .decode_var = falcon_decode_var,
2333 .encode_var = falcon_encode_var,
2334 .get_par = falcon_get_par,
2335 .set_par = falcon_set_par,
2336 .set_screen_base = set_screen_base,
2337 .blank = falcon_blank,
2338 .pan_display = falcon_pan_display,
2343 static struct fb_hwswitch st_switch = {
2344 .detect = stste_detect,
2345 .encode_fix = stste_encode_fix,
2346 .decode_var = stste_decode_var,
2347 .encode_var = stste_encode_var,
2348 .get_par = stste_get_par,
2349 .set_par = stste_set_par,
2350 .set_screen_base = stste_set_screen_base,
2351 .pan_display = pan_display
2356 static struct fb_hwswitch ext_switch = {
2357 .detect = ext_detect,
2358 .encode_fix = ext_encode_fix,
2359 .decode_var = ext_decode_var,
2360 .encode_var = ext_encode_var,
2361 .get_par = ext_get_par,
2362 .set_par = ext_set_par,
2366 static void ata_get_par(struct atafb_par *par)
2368 if (current_par_valid)
2374 static void ata_set_par(struct atafb_par *par)
2378 current_par_valid = 1;
2382 /* =========================================================== */
2383 /* ============== Hardware Independent Functions ============= */
2384 /* =========================================================== */
2386 /* used for hardware scrolling */
2388 static int do_fb_set_var(struct fb_var_screeninfo *var, int isactive)
2391 struct atafb_par par;
2393 err = fbhw->decode_var(var, &par);
2396 activate = var->activate;
2397 if (((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) && isactive)
2399 fbhw->encode_var(var, &par);
2400 var->activate = activate;
2404 /* fbhw->encode_fix() must be called with fb_info->mm_lock held
2405 * if it is called after the register_framebuffer() - not a case here
2407 static int atafb_get_fix(struct fb_fix_screeninfo *fix, struct fb_info *info)
2409 struct atafb_par par;
2411 // Get fix directly (case con == -1 before)??
2412 err = fbhw->decode_var(&info->var, &par);
2415 memset(fix, 0, sizeof(struct fb_fix_screeninfo));
2416 err = fbhw->encode_fix(fix, &par);
2420 static int atafb_get_var(struct fb_var_screeninfo *var, struct fb_info *info)
2422 struct atafb_par par;
2425 fbhw->encode_var(var, &par);
2430 // No longer called by fbcon!
2431 // Still called by set_var internally
2433 static void atafb_set_disp(struct fb_info *info)
2435 atafb_get_var(&info->var, info);
2436 atafb_get_fix(&info->fix, info);
2438 info->screen_base = (void *)info->fix.smem_start;
2441 static int atafb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
2442 u_int transp, struct fb_info *info)
2448 return info->fbops->fb_setcolreg(regno, red, green, blue, transp, info);
2452 atafb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
2454 int xoffset = var->xoffset;
2455 int yoffset = var->yoffset;
2458 if (var->vmode & FB_VMODE_YWRAP) {
2459 if (yoffset < 0 || yoffset >= info->var.yres_virtual || xoffset)
2462 if (xoffset + info->var.xres > info->var.xres_virtual ||
2463 yoffset + info->var.yres > info->var.yres_virtual)
2467 if (fbhw->pan_display) {
2468 err = fbhw->pan_display(var, info);
2474 info->var.xoffset = xoffset;
2475 info->var.yoffset = yoffset;
2477 if (var->vmode & FB_VMODE_YWRAP)
2478 info->var.vmode |= FB_VMODE_YWRAP;
2480 info->var.vmode &= ~FB_VMODE_YWRAP;
2486 * generic drawing routines; imageblit needs updating for image depth > 1
2489 #if BITS_PER_LONG == 32
2490 #define BYTES_PER_LONG 4
2491 #define SHIFT_PER_LONG 5
2492 #elif BITS_PER_LONG == 64
2493 #define BYTES_PER_LONG 8
2494 #define SHIFT_PER_LONG 6
2496 #define Please update me
2500 static void atafb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
2502 struct atafb_par *par = (struct atafb_par *)info->par;
2506 if (!rect->width || !rect->height)
2510 if (info->var.bits_per_pixel == 16) {
2511 cfb_fillrect(info, rect);
2517 * We could use hardware clipping but on many cards you get around
2518 * hardware clipping by writing to framebuffer directly.
2520 x2 = rect->dx + rect->width;
2521 y2 = rect->dy + rect->height;
2522 x2 = x2 < info->var.xres_virtual ? x2 : info->var.xres_virtual;
2523 y2 = y2 < info->var.yres_virtual ? y2 : info->var.yres_virtual;
2524 width = x2 - rect->dx;
2525 height = y2 - rect->dy;
2527 if (info->var.bits_per_pixel == 1)
2528 atafb_mfb_fillrect(info, par->next_line, rect->color,
2529 rect->dy, rect->dx, height, width);
2530 else if (info->var.bits_per_pixel == 2)
2531 atafb_iplan2p2_fillrect(info, par->next_line, rect->color,
2532 rect->dy, rect->dx, height, width);
2533 else if (info->var.bits_per_pixel == 4)
2534 atafb_iplan2p4_fillrect(info, par->next_line, rect->color,
2535 rect->dy, rect->dx, height, width);
2537 atafb_iplan2p8_fillrect(info, par->next_line, rect->color,
2538 rect->dy, rect->dx, height, width);
2543 static void atafb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
2545 struct atafb_par *par = (struct atafb_par *)info->par;
2547 u32 dx, dy, sx, sy, width, height;
2551 if (info->var.bits_per_pixel == 16) {
2552 cfb_copyarea(info, area);
2557 /* clip the destination */
2558 x2 = area->dx + area->width;
2559 y2 = area->dy + area->height;
2560 dx = area->dx > 0 ? area->dx : 0;
2561 dy = area->dy > 0 ? area->dy : 0;
2562 x2 = x2 < info->var.xres_virtual ? x2 : info->var.xres_virtual;
2563 y2 = y2 < info->var.yres_virtual ? y2 : info->var.yres_virtual;
2567 if (area->sx + dx < area->dx || area->sy + dy < area->dy)
2571 sx = area->sx + (dx - area->dx);
2572 sy = area->sy + (dy - area->dy);
2574 /* the source must be completely inside the virtual screen */
2575 if (sx + width > info->var.xres_virtual ||
2576 sy + height > info->var.yres_virtual)
2579 if (dy > sy || (dy == sy && dx > sx)) {
2585 if (info->var.bits_per_pixel == 1)
2586 atafb_mfb_copyarea(info, par->next_line, sy, sx, dy, dx, height, width);
2587 else if (info->var.bits_per_pixel == 2)
2588 atafb_iplan2p2_copyarea(info, par->next_line, sy, sx, dy, dx, height, width);
2589 else if (info->var.bits_per_pixel == 4)
2590 atafb_iplan2p4_copyarea(info, par->next_line, sy, sx, dy, dx, height, width);
2592 atafb_iplan2p8_copyarea(info, par->next_line, sy, sx, dy, dx, height, width);
2597 static void atafb_imageblit(struct fb_info *info, const struct fb_image *image)
2599 struct atafb_par *par = (struct atafb_par *)info->par;
2604 u32 dx, dy, width, height, pitch;
2607 if (info->var.bits_per_pixel == 16) {
2608 cfb_imageblit(info, image);
2614 * We could use hardware clipping but on many cards you get around
2615 * hardware clipping by writing to framebuffer directly like we are
2618 x2 = image->dx + image->width;
2619 y2 = image->dy + image->height;
2622 x2 = x2 < info->var.xres_virtual ? x2 : info->var.xres_virtual;
2623 y2 = y2 < info->var.yres_virtual ? y2 : info->var.yres_virtual;
2627 if (image->depth == 1) {
2628 // used for font data
2629 dst = (unsigned long *)
2630 ((unsigned long)info->screen_base & ~(BYTES_PER_LONG - 1));
2631 dst_idx = ((unsigned long)info->screen_base & (BYTES_PER_LONG - 1)) * 8;
2632 dst_idx += dy * par->next_line * 8 + dx;
2634 pitch = (image->width + 7) / 8;
2637 if (info->var.bits_per_pixel == 1)
2638 atafb_mfb_linefill(info, par->next_line,
2640 image->bg_color, image->fg_color);
2641 else if (info->var.bits_per_pixel == 2)
2642 atafb_iplan2p2_linefill(info, par->next_line,
2644 image->bg_color, image->fg_color);
2645 else if (info->var.bits_per_pixel == 4)
2646 atafb_iplan2p4_linefill(info, par->next_line,
2648 image->bg_color, image->fg_color);
2650 atafb_iplan2p8_linefill(info, par->next_line,
2652 image->bg_color, image->fg_color);
2657 c2p_iplan2(info->screen_base, image->data, dx, dy, width,
2658 height, par->next_line, image->width,
2659 info->var.bits_per_pixel);
2664 atafb_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
2667 #ifdef FBCMD_GET_CURRENTPAR
2668 case FBCMD_GET_CURRENTPAR:
2669 if (copy_to_user((void *)arg, (void *)¤t_par,
2670 sizeof(struct atafb_par)))
2674 #ifdef FBCMD_SET_CURRENTPAR
2675 case FBCMD_SET_CURRENTPAR:
2676 if (copy_from_user((void *)¤t_par, (void *)arg,
2677 sizeof(struct atafb_par)))
2679 ata_set_par(¤t_par);
2686 /* (un)blank/poweroff
2693 static int atafb_blank(int blank, struct fb_info *info)
2695 unsigned short black[16];
2696 struct fb_cmap cmap;
2697 if (fbhw->blank && !fbhw->blank(blank))
2700 memset(black, 0, 16 * sizeof(unsigned short));
2707 fb_set_cmap(&cmap, info);
2711 do_install_cmap(info);
2717 * New fbcon interface ...
2720 /* check var by decoding var into hw par, rounding if necessary,
2721 * then encoding hw par back into new, validated var */
2722 static int atafb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
2725 struct atafb_par par;
2727 /* Validate wanted screen parameters */
2728 // if ((err = ata_decode_var(var, &par)))
2729 err = fbhw->decode_var(var, &par);
2733 /* Encode (possibly rounded) screen parameters */
2734 fbhw->encode_var(var, &par);
2738 /* actually set hw par by decoding var, then setting hardware from
2739 * hw par just decoded */
2740 static int atafb_set_par(struct fb_info *info)
2742 struct atafb_par *par = (struct atafb_par *)info->par;
2744 /* Decode wanted screen parameters */
2745 fbhw->decode_var(&info->var, par);
2746 mutex_lock(&info->mm_lock);
2747 fbhw->encode_fix(&info->fix, par);
2748 mutex_unlock(&info->mm_lock);
2750 /* Set new videomode */
2757 static struct fb_ops atafb_ops = {
2758 .owner = THIS_MODULE,
2759 .fb_check_var = atafb_check_var,
2760 .fb_set_par = atafb_set_par,
2761 .fb_setcolreg = atafb_setcolreg,
2762 .fb_blank = atafb_blank,
2763 .fb_pan_display = atafb_pan_display,
2764 .fb_fillrect = atafb_fillrect,
2765 .fb_copyarea = atafb_copyarea,
2766 .fb_imageblit = atafb_imageblit,
2767 .fb_ioctl = atafb_ioctl,
2770 static void check_default_par(int detected_mode)
2772 char default_name[10];
2774 struct fb_var_screeninfo var;
2775 unsigned long min_mem;
2777 /* First try the user supplied mode */
2779 var = atafb_predefined[default_par - 1];
2780 var.activate = FB_ACTIVATE_TEST;
2781 if (do_fb_set_var(&var, 1))
2782 default_par = 0; /* failed */
2784 /* Next is the autodetected one */
2786 var = atafb_predefined[detected_mode - 1]; /* autodetect */
2787 var.activate = FB_ACTIVATE_TEST;
2788 if (!do_fb_set_var(&var, 1))
2789 default_par = detected_mode;
2791 /* If that also failed, try some default modes... */
2793 /* try default1, default2... */
2794 for (i = 1; i < 10; i++) {
2795 sprintf(default_name,"default%d", i);
2796 default_par = get_video_mode(default_name);
2798 panic("can't set default video mode");
2799 var = atafb_predefined[default_par - 1];
2800 var.activate = FB_ACTIVATE_TEST;
2801 if (!do_fb_set_var(&var,1))
2805 min_mem = var.xres_virtual * var.yres_virtual * var.bits_per_pixel / 8;
2806 if (default_mem_req < min_mem)
2807 default_mem_req = min_mem;
2811 static void __init atafb_setup_ext(char *spec)
2813 int xres, xres_virtual, yres, depth, planes;
2814 unsigned long addr, len;
2817 /* Format is: <xres>;<yres>;<depth>;<plane organ.>;
2819 * [;<screen mem length>[;<vgaiobase>[;<bits-per-col>[;<colorreg-type>
2820 * [;<xres-virtual>]]]]]
2823 * <xres_virtual>: hardware's x-resolution (f.e. ProMST)
2825 * Even xres_virtual is available, we neither support panning nor hw-scrolling!
2827 p = strsep(&spec, ";");
2830 xres_virtual = xres = simple_strtoul(p, NULL, 10);
2834 p = strsep(&spec, ";");
2837 yres = simple_strtoul(p, NULL, 10);
2841 p = strsep(&spec, ";");
2844 depth = simple_strtoul(p, NULL, 10);
2845 if (depth != 1 && depth != 2 && depth != 4 && depth != 8 &&
2846 depth != 16 && depth != 24)
2849 p = strsep(&spec, ";");
2853 planes = FB_TYPE_INTERLEAVED_PLANES;
2855 planes = FB_TYPE_PACKED_PIXELS;
2857 planes = FB_TYPE_PLANES;
2859 planes = -1; /* true color */
2863 p = strsep(&spec, ";");
2866 addr = simple_strtoul(p, NULL, 0);
2868 p = strsep(&spec, ";");
2870 len = xres * yres * depth / 8;
2872 len = simple_strtoul(p, NULL, 0);
2874 p = strsep(&spec, ";");
2876 external_vgaiobase = simple_strtoul(p, NULL, 0);
2878 p = strsep(&spec, ";");
2880 external_bitspercol = simple_strtoul(p, NULL, 0);
2881 if (external_bitspercol > 8)
2882 external_bitspercol = 8;
2883 else if (external_bitspercol < 1)
2884 external_bitspercol = 1;
2887 p = strsep(&spec, ";");
2889 if (!strcmp(p, "vga"))
2890 external_card_type = IS_VGA;
2891 if (!strcmp(p, "mv300"))
2892 external_card_type = IS_MV300;
2895 p = strsep(&spec, ";");
2897 xres_virtual = simple_strtoul(p, NULL, 10);
2898 if (xres_virtual < xres)
2899 xres_virtual = xres;
2900 if (xres_virtual * yres * depth / 8 > len)
2901 len = xres_virtual * yres * depth / 8;
2904 external_xres = xres;
2905 external_xres_virtual = xres_virtual;
2906 external_yres = yres;
2907 external_depth = depth;
2908 external_pmode = planes;
2909 external_addr = (void *)addr;
2912 if (external_card_type == IS_MV300) {
2913 switch (external_depth) {
2915 MV300_reg = MV300_reg_1bit;
2918 MV300_reg = MV300_reg_4bit;
2921 MV300_reg = MV300_reg_8bit;
2926 #endif /* ATAFB_EXT */
2928 static void __init atafb_setup_int(char *spec)
2930 /* Format to config extended internal video hardware like OverScan:
2931 * "internal:<xres>;<yres>;<xres_max>;<yres_max>;<offset>"
2933 * <xres>: x-resolution
2934 * <yres>: y-resolution
2935 * The following are only needed if you have an overscan which
2936 * needs a black border:
2937 * <xres_max>: max. length of a line in pixels your OverScan hardware would allow
2938 * <yres_max>: max. number of lines your OverScan hardware would allow
2939 * <offset>: Offset from physical beginning to visible beginning
2940 * of screen in bytes
2945 if (!(p = strsep(&spec, ";")) || !*p)
2947 xres = simple_strtoul(p, NULL, 10);
2948 if (!(p = strsep(&spec, ";")) || !*p)
2951 tt_yres = st_yres = simple_strtoul(p, NULL, 10);
2952 if ((p = strsep(&spec, ";")) && *p)
2953 sttt_xres_virtual = simple_strtoul(p, NULL, 10);
2954 if ((p = strsep(&spec, ";")) && *p)
2955 sttt_yres_virtual = simple_strtoul(p, NULL, 0);
2956 if ((p = strsep(&spec, ";")) && *p)
2957 ovsc_offset = simple_strtoul(p, NULL, 0);
2959 if (ovsc_offset || (sttt_yres_virtual != st_yres))
2964 static void __init atafb_setup_mcap(char *spec)
2967 int vmin, vmax, hmin, hmax;
2969 /* Format for monitor capabilities is: <Vmin>;<Vmax>;<Hmin>;<Hmax>
2970 * <V*> vertical freq. in Hz
2971 * <H*> horizontal freq. in kHz
2973 if (!(p = strsep(&spec, ";")) || !*p)
2975 vmin = simple_strtoul(p, NULL, 10);
2978 if (!(p = strsep(&spec, ";")) || !*p)
2980 vmax = simple_strtoul(p, NULL, 10);
2981 if (vmax <= 0 || vmax <= vmin)
2983 if (!(p = strsep(&spec, ";")) || !*p)
2985 hmin = 1000 * simple_strtoul(p, NULL, 10);
2988 if (!(p = strsep(&spec, "")) || !*p)
2990 hmax = 1000 * simple_strtoul(p, NULL, 10);
2991 if (hmax <= 0 || hmax <= hmin)
2994 fb_info.monspecs.vfmin = vmin;
2995 fb_info.monspecs.vfmax = vmax;
2996 fb_info.monspecs.hfmin = hmin;
2997 fb_info.monspecs.hfmax = hmax;
2999 #endif /* ATAFB_FALCON */
3001 static void __init atafb_setup_user(char *spec)
3003 /* Format of user defined video mode is: <xres>;<yres>;<depth>
3006 int xres, yres, depth, temp;
3008 p = strsep(&spec, ";");
3011 xres = simple_strtoul(p, NULL, 10);
3012 p = strsep(&spec, ";");
3015 yres = simple_strtoul(p, NULL, 10);
3016 p = strsep(&spec, "");
3019 depth = simple_strtoul(p, NULL, 10);
3020 temp = get_video_mode("user0");
3023 atafb_predefined[default_par - 1].xres = xres;
3024 atafb_predefined[default_par - 1].yres = yres;
3025 atafb_predefined[default_par - 1].bits_per_pixel = depth;
3029 int __init atafb_setup(char *options)
3034 if (!options || !*options)
3037 while ((this_opt = strsep(&options, ",")) != NULL) {
3040 if ((temp = get_video_mode(this_opt))) {
3042 mode_option = this_opt;
3043 } else if (!strcmp(this_opt, "inverse"))
3045 else if (!strncmp(this_opt, "hwscroll_", 9)) {
3046 hwscroll = simple_strtoul(this_opt + 9, NULL, 10);
3053 else if (!strcmp(this_opt, "mv300")) {
3054 external_bitspercol = 8;
3055 external_card_type = IS_MV300;
3056 } else if (!strncmp(this_opt, "external:", 9))
3057 atafb_setup_ext(this_opt + 9);
3059 else if (!strncmp(this_opt, "internal:", 9))
3060 atafb_setup_int(this_opt + 9);
3062 else if (!strncmp(this_opt, "eclock:", 7)) {
3063 fext.f = simple_strtoul(this_opt + 7, NULL, 10);
3064 /* external pixelclock in kHz --> ps */
3065 fext.t = 1000000000 / fext.f;
3067 } else if (!strncmp(this_opt, "monitorcap:", 11))
3068 atafb_setup_mcap(this_opt + 11);
3070 else if (!strcmp(this_opt, "keep"))
3072 else if (!strncmp(this_opt, "R", 1))
3073 atafb_setup_user(this_opt + 1);
3078 int __init atafb_init(void)
3080 int pad, detected_mode, error;
3081 unsigned int defmode = 0;
3082 unsigned long mem_req;
3085 char *option = NULL;
3087 if (fb_get_options("atafb", &option))
3089 atafb_setup(option);
3091 printk("atafb_init: start\n");
3098 if (external_addr) {
3099 printk("atafb_init: initializing external hw\n");
3101 atafb_ops.fb_setcolreg = &ext_setcolreg;
3102 defmode = DEFMODE_EXT;
3107 if (ATARIHW_PRESENT(TT_SHIFTER)) {
3108 printk("atafb_init: initializing TT hw\n");
3110 atafb_ops.fb_setcolreg = &tt_setcolreg;
3111 defmode = DEFMODE_TT;
3116 if (ATARIHW_PRESENT(VIDEL_SHIFTER)) {
3117 printk("atafb_init: initializing Falcon hw\n");
3118 fbhw = &falcon_switch;
3119 atafb_ops.fb_setcolreg = &falcon_setcolreg;
3120 error = request_irq(IRQ_AUTO_4, falcon_vbl_switcher,
3122 "framebuffer/modeswitch",
3123 falcon_vbl_switcher);
3126 defmode = DEFMODE_F30;
3131 if (ATARIHW_PRESENT(STND_SHIFTER) ||
3132 ATARIHW_PRESENT(EXTD_SHIFTER)) {
3133 printk("atafb_init: initializing ST/E hw\n");
3135 atafb_ops.fb_setcolreg = &stste_setcolreg;
3136 defmode = DEFMODE_STE;
3140 atafb_ops.fb_setcolreg = &stste_setcolreg;
3141 printk("Cannot determine video hardware; defaulting to ST(e)\n");
3142 #else /* ATAFB_STE */
3143 /* no default driver included */
3144 /* Nobody will ever see this message :-) */
3145 panic("Cannot initialize video hardware");
3149 /* Multisync monitor capabilities */
3150 /* Atari-TOS defaults if no boot option present */
3151 if (fb_info.monspecs.hfmin == 0) {
3152 fb_info.monspecs.hfmin = 31000;
3153 fb_info.monspecs.hfmax = 32000;
3154 fb_info.monspecs.vfmin = 58;
3155 fb_info.monspecs.vfmax = 62;
3158 detected_mode = fbhw->detect();
3159 check_default_par(detected_mode);
3161 if (!external_addr) {
3162 #endif /* ATAFB_EXT */
3163 mem_req = default_mem_req + ovsc_offset + ovsc_addlen;
3164 mem_req = PAGE_ALIGN(mem_req) + PAGE_SIZE;
3165 screen_base = atari_stram_alloc(mem_req, "atafb");
3167 panic("Cannot allocate screen memory");
3168 memset(screen_base, 0, mem_req);
3169 pad = -(unsigned long)screen_base & (PAGE_SIZE - 1);
3171 real_screen_base = screen_base + ovsc_offset;
3172 screen_len = (mem_req - pad - ovsc_offset) & PAGE_MASK;
3174 if (CPU_IS_040_OR_060) {
3175 /* On a '040+, the cache mode of video RAM must be set to
3176 * write-through also for internal video hardware! */
3177 cache_push(virt_to_phys(screen_base), screen_len);
3178 kernel_set_cachemode(screen_base, screen_len,
3179 IOMAP_WRITETHROUGH);
3181 printk("atafb: screen_base %p real_screen_base %p screen_len %d\n",
3182 screen_base, real_screen_base, screen_len);
3185 /* Map the video memory (physical address given) to somewhere
3186 * in the kernel address space.
3188 external_addr = ioremap_writethrough((unsigned long)external_addr,
3190 if (external_vgaiobase)
3191 external_vgaiobase =
3192 (unsigned long)ioremap(external_vgaiobase, 0x10000);
3194 real_screen_base = external_addr;
3195 screen_len = external_len & PAGE_MASK;
3196 memset (screen_base, 0, external_len);
3198 #endif /* ATAFB_EXT */
3200 // strcpy(fb_info.mode->name, "Atari Builtin ");
3201 fb_info.fbops = &atafb_ops;
3202 // try to set default (detected; requested) var
3203 do_fb_set_var(&atafb_predefined[default_par - 1], 1);
3204 // reads hw state into current par, which may not be sane yet
3205 ata_get_par(¤t_par);
3206 fb_info.par = ¤t_par;
3207 // tries to read from HW which may not be initialized yet
3208 // so set sane var first, then call atafb_set_par
3209 atafb_get_var(&fb_info.var, &fb_info);
3212 fb_info.pseudo_palette = current_par.hw.falcon.pseudo_palette;
3214 fb_info.flags = FBINFO_FLAG_DEFAULT;
3216 if (!fb_find_mode(&fb_info.var, &fb_info, mode_option, atafb_modedb,
3217 NUM_TOTAL_MODES, &atafb_modedb[defmode],
3218 fb_info.var.bits_per_pixel)) {
3222 fb_videomode_to_modelist(atafb_modedb, NUM_TOTAL_MODES,
3225 atafb_set_disp(&fb_info);
3227 fb_alloc_cmap(&(fb_info.cmap), 1 << fb_info.var.bits_per_pixel, 0);
3230 printk("Determined %dx%d, depth %d\n",
3231 fb_info.var.xres, fb_info.var.yres, fb_info.var.bits_per_pixel);
3232 if ((fb_info.var.xres != fb_info.var.xres_virtual) ||
3233 (fb_info.var.yres != fb_info.var.yres_virtual))
3234 printk(" virtual %dx%d\n", fb_info.var.xres_virtual,
3235 fb_info.var.yres_virtual);
3237 if (register_framebuffer(&fb_info) < 0) {
3239 if (external_addr) {
3240 iounmap(external_addr);
3241 external_addr = NULL;
3243 if (external_vgaiobase) {
3244 iounmap((void*)external_vgaiobase);
3245 external_vgaiobase = 0;
3251 // FIXME: mode needs setting!
3252 //printk("fb%d: %s frame buffer device, using %dK of video memory\n",
3253 // fb_info.node, fb_info.mode->name, screen_len>>10);
3254 printk("fb%d: frame buffer device, using %dK of video memory\n",
3255 fb_info.node, screen_len >> 10);
3257 /* TODO: This driver cannot be unloaded yet */
3261 module_init(atafb_init);
3264 MODULE_LICENSE("GPL");
3266 int cleanup_module(void)
3268 unregister_framebuffer(&fb_info);
3269 return atafb_deinit();