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/slab.h>
56 #include <linux/delay.h>
57 #include <linux/init.h>
58 #include <linux/interrupt.h>
60 #include <asm/setup.h>
61 #include <linux/uaccess.h>
62 #include <asm/pgtable.h>
66 #include <asm/atarihw.h>
67 #include <asm/atariints.h>
68 #include <asm/atari_stram.h>
71 #include <asm/atarikb.h>
76 #define SWITCH_ACIA 0x01 /* modes for switch on OverScan */
77 #define SWITCH_SND6 0x40
78 #define SWITCH_SND7 0x80
79 #define SWITCH_NONE 0x00
82 #define up(x, r) (((x) + (r) - 1) & ~((r)-1))
85 * Interface to the world
88 static int atafb_check_var(struct fb_var_screeninfo *var, struct fb_info *info);
89 static int atafb_set_par(struct fb_info *info);
90 static int atafb_setcolreg(unsigned int regno, unsigned int red, unsigned int green,
91 unsigned int blue, unsigned int transp,
92 struct fb_info *info);
93 static int atafb_blank(int blank, struct fb_info *info);
94 static int atafb_pan_display(struct fb_var_screeninfo *var,
95 struct fb_info *info);
96 static void atafb_fillrect(struct fb_info *info,
97 const struct fb_fillrect *rect);
98 static void atafb_copyarea(struct fb_info *info,
99 const struct fb_copyarea *region);
100 static void atafb_imageblit(struct fb_info *info, const struct fb_image *image);
101 static int atafb_ioctl(struct fb_info *info, unsigned int cmd,
105 static int default_par; /* default resolution (0=none) */
107 static unsigned long default_mem_req;
109 static int hwscroll = -1;
111 static int use_hwscroll = 1;
113 static int sttt_xres = 640, st_yres = 400, tt_yres = 480;
114 static int sttt_xres_virtual = 640, sttt_yres_virtual = 400;
115 static int ovsc_offset, ovsc_addlen;
118 * Hardware parameters for current mode
121 static struct atafb_par {
125 #if defined ATAFB_TT || defined ATAFB_STE
134 /* Here are fields for storing a video mode, as direct
135 * parameters for the hardware.
145 short hht, hbb, hbe, hdb, hde, hss;
146 short vft, vbb, vbe, vdb, vde, vss;
147 /* auxiliary information */
151 u32 pseudo_palette[16];
154 /* Nothing needed for external mode */
158 /* Don't calculate an own resolution, and thus don't change the one found when
159 * booting (currently used for the Falcon to keep settings for internal video
160 * hardware extensions (e.g. ScreenBlaster) */
161 static int DontCalcRes = 0;
164 #define HHT hw.falcon.hht
165 #define HBB hw.falcon.hbb
166 #define HBE hw.falcon.hbe
167 #define HDB hw.falcon.hdb
168 #define HDE hw.falcon.hde
169 #define HSS hw.falcon.hss
170 #define VFT hw.falcon.vft
171 #define VBB hw.falcon.vbb
172 #define VBE hw.falcon.vbe
173 #define VDB hw.falcon.vdb
174 #define VDE hw.falcon.vde
175 #define VSS hw.falcon.vss
176 #define VCO_CLOCK25 0x04
177 #define VCO_CSYPOS 0x10
178 #define VCO_VSYPOS 0x20
179 #define VCO_HSYPOS 0x40
180 #define VCO_SHORTOFFS 0x100
181 #define VMO_DOUBLE 0x01
182 #define VMO_INTER 0x02
183 #define VMO_PREMASK 0x0c
186 static struct fb_info fb_info = {
189 .visual = FB_VISUAL_PSEUDOCOLOR,
190 .accel = FB_ACCEL_NONE,
194 static void *screen_base; /* base address of screen */
195 static void *real_screen_base; /* (only for Overscan) */
197 static int screen_len;
199 static int current_par_valid;
201 static int mono_moni;
206 /* external video handling */
207 static unsigned int external_xres;
208 static unsigned int external_xres_virtual;
209 static unsigned int external_yres;
212 * not needed - atafb will never support panning/hardwarescroll with external
213 * static unsigned int external_yres_virtual;
215 static unsigned int external_depth;
216 static int external_pmode;
217 static void *external_addr;
218 static unsigned long external_len;
219 static unsigned long external_vgaiobase;
220 static unsigned int external_bitspercol = 6;
223 * JOE <joe@amber.dinoco.de>:
224 * added card type for external driver, is only needed for
227 enum cardtype { IS_VGA, IS_MV300 };
228 static enum cardtype external_card_type = IS_VGA;
231 * The MV300 mixes the color registers. So we need an array of munged
232 * indices in order to access the correct reg.
234 static int MV300_reg_1bit[2] = {
237 static int MV300_reg_4bit[16] = {
238 0, 8, 4, 12, 2, 10, 6, 14, 1, 9, 5, 13, 3, 11, 7, 15
240 static int MV300_reg_8bit[256] = {
241 0, 128, 64, 192, 32, 160, 96, 224, 16, 144, 80, 208, 48, 176, 112, 240,
242 8, 136, 72, 200, 40, 168, 104, 232, 24, 152, 88, 216, 56, 184, 120, 248,
243 4, 132, 68, 196, 36, 164, 100, 228, 20, 148, 84, 212, 52, 180, 116, 244,
244 12, 140, 76, 204, 44, 172, 108, 236, 28, 156, 92, 220, 60, 188, 124, 252,
245 2, 130, 66, 194, 34, 162, 98, 226, 18, 146, 82, 210, 50, 178, 114, 242,
246 10, 138, 74, 202, 42, 170, 106, 234, 26, 154, 90, 218, 58, 186, 122, 250,
247 6, 134, 70, 198, 38, 166, 102, 230, 22, 150, 86, 214, 54, 182, 118, 246,
248 14, 142, 78, 206, 46, 174, 110, 238, 30, 158, 94, 222, 62, 190, 126, 254,
249 1, 129, 65, 193, 33, 161, 97, 225, 17, 145, 81, 209, 49, 177, 113, 241,
250 9, 137, 73, 201, 41, 169, 105, 233, 25, 153, 89, 217, 57, 185, 121, 249,
251 5, 133, 69, 197, 37, 165, 101, 229, 21, 149, 85, 213, 53, 181, 117, 245,
252 13, 141, 77, 205, 45, 173, 109, 237, 29, 157, 93, 221, 61, 189, 125, 253,
253 3, 131, 67, 195, 35, 163, 99, 227, 19, 147, 83, 211, 51, 179, 115, 243,
254 11, 139, 75, 203, 43, 171, 107, 235, 27, 155, 91, 219, 59, 187, 123, 251,
255 7, 135, 71, 199, 39, 167, 103, 231, 23, 151, 87, 215, 55, 183, 119, 247,
256 15, 143, 79, 207, 47, 175, 111, 239, 31, 159, 95, 223, 63, 191, 127, 255
259 static int *MV300_reg = MV300_reg_8bit;
260 #endif /* ATAFB_EXT */
265 extern int fontheight_8x8;
266 extern int fontwidth_8x8;
267 extern unsigned char fontdata_8x8[];
269 extern int fontheight_8x16;
270 extern int fontwidth_8x16;
271 extern unsigned char fontdata_8x16[];
275 * * open/release and usage marking
276 * struct module *owner;
277 * int (*fb_open)(struct fb_info *info, int user);
278 * int (*fb_release)(struct fb_info *info, int user);
280 * * For framebuffers with strange non linear layouts or that do not
281 * * work with normal memory mapped access
282 * ssize_t (*fb_read)(struct file *file, char __user *buf, size_t count, loff_t *ppos);
283 * ssize_t (*fb_write)(struct file *file, const char __user *buf, size_t count, loff_t *ppos);
285 * * checks var and eventually tweaks it to something supported,
286 * * DOES NOT MODIFY PAR *
287 * int (*fb_check_var)(struct fb_var_screeninfo *var, struct fb_info *info);
289 * * set the video mode according to info->var *
290 * int (*fb_set_par)(struct fb_info *info);
292 * * set color register *
293 * int (*fb_setcolreg)(unsigned int regno, unsigned int red, unsigned int green,
294 * unsigned int blue, unsigned int transp, struct fb_info *info);
296 * * set color registers in batch *
297 * int (*fb_setcmap)(struct fb_cmap *cmap, struct fb_info *info);
300 * int (*fb_blank)(int blank, struct fb_info *info);
303 * int (*fb_pan_display)(struct fb_var_screeninfo *var, struct fb_info *info);
305 * *** The meat of the drawing engine ***
306 * * Draws a rectangle *
307 * void (*fb_fillrect) (struct fb_info *info, const struct fb_fillrect *rect);
308 * * Copy data from area to another *
309 * void (*fb_copyarea) (struct fb_info *info, const struct fb_copyarea *region);
310 * * Draws a image to the display *
311 * void (*fb_imageblit) (struct fb_info *info, const struct fb_image *image);
314 * int (*fb_cursor) (struct fb_info *info, struct fb_cursor *cursor);
316 * * Rotates the display *
317 * void (*fb_rotate)(struct fb_info *info, int angle);
319 * * wait for blit idle, optional *
320 * int (*fb_sync)(struct fb_info *info);
322 * * perform fb specific ioctl (optional) *
323 * int (*fb_ioctl)(struct fb_info *info, unsigned int cmd,
324 * unsigned long arg);
326 * * Handle 32bit compat ioctl (optional) *
327 * int (*fb_compat_ioctl)(struct fb_info *info, unsigned int cmd,
328 * unsigned long arg);
330 * * perform fb specific mmap *
331 * int (*fb_mmap)(struct fb_info *info, struct vm_area_struct *vma);
336 /* ++roman: This structure abstracts from the underlying hardware (ST(e),
339 * int (*detect)(void)
340 * This function should detect the current video mode settings and
341 * store them in atafb_predefined[0] for later reference by the
342 * user. Return the index+1 of an equivalent predefined mode or 0
343 * if there is no such.
345 * int (*encode_fix)(struct fb_fix_screeninfo *fix,
346 * struct atafb_par *par)
347 * This function should fill in the 'fix' structure based on the
348 * values in the 'par' structure.
349 * !!! Obsolete, perhaps !!!
351 * int (*decode_var)(struct fb_var_screeninfo *var,
352 * struct atafb_par *par)
353 * Get the video params out of 'var'. If a value doesn't fit, round
354 * it up, if it's too big, return EINVAL.
355 * Round up in the following order: bits_per_pixel, xres, yres,
356 * xres_virtual, yres_virtual, xoffset, yoffset, grayscale, bitfields,
357 * horizontal timing, vertical timing.
359 * int (*encode_var)(struct fb_var_screeninfo *var,
360 * struct atafb_par *par);
361 * Fill the 'var' structure based on the values in 'par' and maybe
362 * other values read out of the hardware.
364 * void (*get_par)(struct atafb_par *par)
365 * Fill the hardware's 'par' structure.
366 * !!! Used only by detect() !!!
368 * void (*set_par)(struct atafb_par *par)
369 * Set the hardware according to 'par'.
371 * void (*set_screen_base)(void *s_base)
372 * Set the base address of the displayed frame buffer. Only called
373 * if yres_virtual > yres or xres_virtual > xres.
375 * int (*blank)(int blank_mode)
376 * Blank the screen if blank_mode != 0, else unblank. If blank == NULL then
377 * the caller blanks by setting the CLUT to all black. Return 0 if blanking
378 * succeeded, !=0 if un-/blanking failed due to e.g. a video mode which
379 * doesn't support it. Implements VESA suspend and powerdown modes on
380 * hardware that supports disabling hsync/vsync:
381 * blank_mode == 2: suspend vsync, 3:suspend hsync, 4: powerdown.
384 static struct fb_hwswitch {
386 int (*encode_fix)(struct fb_fix_screeninfo *fix,
387 struct atafb_par *par);
388 int (*decode_var)(struct fb_var_screeninfo *var,
389 struct atafb_par *par);
390 int (*encode_var)(struct fb_var_screeninfo *var,
391 struct atafb_par *par);
392 void (*get_par)(struct atafb_par *par);
393 void (*set_par)(struct atafb_par *par);
394 void (*set_screen_base)(void *s_base);
395 int (*blank)(int blank_mode);
396 int (*pan_display)(struct fb_var_screeninfo *var,
397 struct fb_info *info);
400 static char *autodetect_names[] = { "autodetect", NULL };
401 static char *stlow_names[] = { "stlow", NULL };
402 static char *stmid_names[] = { "stmid", "default5", NULL };
403 static char *sthigh_names[] = { "sthigh", "default4", NULL };
404 static char *ttlow_names[] = { "ttlow", NULL };
405 static char *ttmid_names[] = { "ttmid", "default1", NULL };
406 static char *tthigh_names[] = { "tthigh", "default2", NULL };
407 static char *vga2_names[] = { "vga2", NULL };
408 static char *vga4_names[] = { "vga4", NULL };
409 static char *vga16_names[] = { "vga16", "default3", NULL };
410 static char *vga256_names[] = { "vga256", NULL };
411 static char *falh2_names[] = { "falh2", NULL };
412 static char *falh16_names[] = { "falh16", NULL };
414 static char **fb_var_names[] = {
431 static struct fb_var_screeninfo atafb_predefined[] = {
433 * yres_virtual == 0 means use hw-scrolling if possible, else yres
436 0, 0, 0, 0, 0, 0, 0, 0, /* xres-grayscale */
437 {0, 0, 0}, {0, 0, 0}, {0, 0, 0}, {0, 0, 0}, /* red green blue tran*/
438 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
440 320, 200, 320, 0, 0, 0, 4, 0,
441 {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
442 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
444 640, 200, 640, 0, 0, 0, 2, 0,
445 {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
446 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
448 640, 400, 640, 0, 0, 0, 1, 0,
449 {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
450 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
452 320, 480, 320, 0, 0, 0, 8, 0,
453 {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
454 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
456 640, 480, 640, 0, 0, 0, 4, 0,
457 {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
458 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
460 1280, 960, 1280, 0, 0, 0, 1, 0,
461 {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
462 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
464 640, 480, 640, 0, 0, 0, 1, 0,
465 {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
466 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
468 640, 480, 640, 0, 0, 0, 2, 0,
469 {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
470 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
472 640, 480, 640, 0, 0, 0, 4, 0,
473 {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
474 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
476 640, 480, 640, 0, 0, 0, 8, 0,
477 {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
478 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
480 896, 608, 896, 0, 0, 0, 1, 0,
481 {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
482 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
484 896, 608, 896, 0, 0, 0, 4, 0,
485 {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
486 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
489 static int num_atafb_predefined = ARRAY_SIZE(atafb_predefined);
491 static struct fb_videomode atafb_modedb[] __initdata = {
495 * If you change these, make sure to update DEFMODE_* as well!
503 /* 320x200, 15 kHz, 60 Hz (ST low) */
504 "st-low", 60, 320, 200, 32000, 32, 16, 31, 14, 96, 4,
505 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
507 /* 640x200, 15 kHz, 60 Hz (ST medium) */
508 "st-mid", 60, 640, 200, 32000, 32, 16, 31, 14, 96, 4,
509 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
511 /* 640x400, 30.25 kHz, 63.5 Hz (ST high) */
512 "st-high", 63, 640, 400, 32000, 128, 0, 40, 14, 128, 4,
513 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
515 /* 320x480, 15 kHz, 60 Hz (TT low) */
516 "tt-low", 60, 320, 480, 31041, 120, 100, 8, 16, 140, 30,
517 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
519 /* 640x480, 29 kHz, 57 Hz (TT medium) */
520 "tt-mid", 60, 640, 480, 31041, 120, 100, 8, 16, 140, 30,
521 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
523 /* 1280x960, 29 kHz, 60 Hz (TT high) */
524 "tt-high", 57, 640, 960, 31041, 120, 100, 8, 16, 140, 30,
525 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
533 /* 640x480, 31 kHz, 60 Hz (VGA) */
534 "vga", 63.5, 640, 480, 32000, 18, 42, 31, 11, 96, 3,
535 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
537 /* 640x400, 31 kHz, 70 Hz (VGA) */
538 "vga70", 70, 640, 400, 32000, 18, 42, 31, 11, 96, 3,
539 FB_SYNC_VERT_HIGH_ACT | FB_SYNC_COMP_HIGH_ACT, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
543 * Falcon HiRes Video Modes
547 /* 896x608, 31 kHz, 60 Hz (Falcon High) */
548 "falh", 60, 896, 608, 32000, 18, 42, 31, 1, 96,3,
549 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
553 #define NUM_TOTAL_MODES ARRAY_SIZE(atafb_modedb)
555 static char *mode_option __initdata = NULL;
559 #define DEFMODE_TT 5 /* "tt-high" for TT */
560 #define DEFMODE_F30 7 /* "vga70" for Falcon */
561 #define DEFMODE_STE 2 /* "st-high" for ST/E */
562 #define DEFMODE_EXT 6 /* "vga" for external */
565 static int get_video_mode(char *vname)
571 name_list = fb_var_names;
572 for (i = 0; i < num_atafb_predefined; i++) {
577 if (!strcmp(vname, *name))
587 /* ------------------- TT specific functions ---------------------- */
591 static int tt_encode_fix(struct fb_fix_screeninfo *fix, struct atafb_par *par)
595 strcpy(fix->id, "Atari Builtin");
596 fix->smem_start = (unsigned long)real_screen_base;
597 fix->smem_len = screen_len;
598 fix->type = FB_TYPE_INTERLEAVED_PLANES;
600 fix->visual = FB_VISUAL_PSEUDOCOLOR;
601 mode = par->hw.tt.mode & TT_SHIFTER_MODEMASK;
602 if (mode == TT_SHIFTER_TTHIGH || mode == TT_SHIFTER_STHIGH) {
603 fix->type = FB_TYPE_PACKED_PIXELS;
605 if (mode == TT_SHIFTER_TTHIGH)
606 fix->visual = FB_VISUAL_MONO01;
611 fix->line_length = par->next_line;
612 fix->accel = FB_ACCEL_ATARIBLITT;
616 static int tt_decode_var(struct fb_var_screeninfo *var, struct atafb_par *par)
618 int xres = var->xres;
619 int yres = var->yres;
620 int bpp = var->bits_per_pixel;
622 int yres_virtual = var->yres_virtual;
625 if (bpp > 1 || xres > sttt_xres * 2 || yres > tt_yres * 2)
627 par->hw.tt.mode = TT_SHIFTER_TTHIGH;
628 xres = sttt_xres * 2;
632 if (bpp > 8 || xres > sttt_xres || yres > tt_yres)
635 if (xres > sttt_xres / 2 || yres > tt_yres)
637 par->hw.tt.mode = TT_SHIFTER_TTLOW;
638 xres = sttt_xres / 2;
641 } else if (bpp > 2) {
642 if (xres > sttt_xres || yres > tt_yres)
644 if (xres > sttt_xres / 2 || yres > st_yres / 2) {
645 par->hw.tt.mode = TT_SHIFTER_TTMID;
650 par->hw.tt.mode = TT_SHIFTER_STLOW;
651 xres = sttt_xres / 2;
655 } else if (bpp > 1) {
656 if (xres > sttt_xres || yres > st_yres / 2)
658 par->hw.tt.mode = TT_SHIFTER_STMID;
662 } else if (var->xres > sttt_xres || var->yres > st_yres) {
665 par->hw.tt.mode = TT_SHIFTER_STHIGH;
671 if (yres_virtual <= 0)
673 else if (yres_virtual < yres)
675 if (var->sync & FB_SYNC_EXT)
679 linelen = xres * bpp / 8;
680 if (yres_virtual * linelen > screen_len && screen_len)
682 if (yres * linelen > screen_len && screen_len)
684 if (var->yoffset + yres > yres_virtual && yres_virtual)
686 par->yres_virtual = yres_virtual;
687 par->screen_base = screen_base + var->yoffset * linelen;
688 par->next_line = linelen;
692 static int tt_encode_var(struct fb_var_screeninfo *var, struct atafb_par *par)
695 memset(var, 0, sizeof(struct fb_var_screeninfo));
698 var->red.msb_right = 0;
701 var->pixclock = 31041;
702 var->left_margin = 120; /* these may be incorrect */
703 var->right_margin = 100;
704 var->upper_margin = 8;
705 var->lower_margin = 16;
706 var->hsync_len = 140;
712 if (par->hw.tt.sync & 1)
715 var->sync = FB_SYNC_EXT;
717 switch (par->hw.tt.mode & TT_SHIFTER_MODEMASK) {
718 case TT_SHIFTER_STLOW:
719 var->xres = sttt_xres / 2;
720 var->xres_virtual = sttt_xres_virtual / 2;
721 var->yres = st_yres / 2;
722 var->bits_per_pixel = 4;
724 case TT_SHIFTER_STMID:
725 var->xres = sttt_xres;
726 var->xres_virtual = sttt_xres_virtual;
727 var->yres = st_yres / 2;
728 var->bits_per_pixel = 2;
730 case TT_SHIFTER_STHIGH:
731 var->xres = sttt_xres;
732 var->xres_virtual = sttt_xres_virtual;
734 var->bits_per_pixel = 1;
736 case TT_SHIFTER_TTLOW:
737 var->xres = sttt_xres / 2;
738 var->xres_virtual = sttt_xres_virtual / 2;
740 var->bits_per_pixel = 8;
742 case TT_SHIFTER_TTMID:
743 var->xres = sttt_xres;
744 var->xres_virtual = sttt_xres_virtual;
746 var->bits_per_pixel = 4;
748 case TT_SHIFTER_TTHIGH:
750 var->xres = sttt_xres * 2;
751 var->xres_virtual = sttt_xres_virtual * 2;
752 var->yres = tt_yres * 2;
753 var->bits_per_pixel = 1;
756 var->blue = var->green = var->red;
757 var->transp.offset = 0;
758 var->transp.length = 0;
759 var->transp.msb_right = 0;
760 linelen = var->xres_virtual * var->bits_per_pixel / 8;
762 var->yres_virtual = var->yres;
763 else if (screen_len) {
764 if (par->yres_virtual)
765 var->yres_virtual = par->yres_virtual;
767 /* yres_virtual == 0 means use maximum */
768 var->yres_virtual = screen_len / linelen;
771 var->yres_virtual = 2 * var->yres;
773 var->yres_virtual = var->yres + hwscroll * 16;
777 var->yoffset = (par->screen_base - screen_base) / linelen;
782 var->vmode = FB_VMODE_NONINTERLACED;
786 static void tt_get_par(struct atafb_par *par)
789 par->hw.tt.mode = shifter_tt.tt_shiftmode;
790 par->hw.tt.sync = shifter.syncmode;
791 addr = ((shifter.bas_hi & 0xff) << 16) |
792 ((shifter.bas_md & 0xff) << 8) |
793 ((shifter.bas_lo & 0xff));
794 par->screen_base = phys_to_virt(addr);
797 static void tt_set_par(struct atafb_par *par)
799 shifter_tt.tt_shiftmode = par->hw.tt.mode;
800 shifter.syncmode = par->hw.tt.sync;
801 /* only set screen_base if really necessary */
802 if (current_par.screen_base != par->screen_base)
803 fbhw->set_screen_base(par->screen_base);
806 static int tt_setcolreg(unsigned int regno, unsigned int red,
807 unsigned int green, unsigned int blue,
808 unsigned int transp, struct fb_info *info)
810 if ((shifter_tt.tt_shiftmode & TT_SHIFTER_MODEMASK) == TT_SHIFTER_STHIGH)
814 tt_palette[regno] = (((red >> 12) << 8) | ((green >> 12) << 4) |
816 if ((shifter_tt.tt_shiftmode & TT_SHIFTER_MODEMASK) ==
817 TT_SHIFTER_STHIGH && regno == 254)
822 static int tt_detect(void)
824 struct atafb_par par;
826 /* Determine the connected monitor: The DMA sound must be
827 * disabled before reading the MFP GPIP, because the Sound
828 * Done Signal and the Monochrome Detect are XORed together!
830 * Even on a TT, we should look if there is a DMA sound. It was
831 * announced that the Eagle is TT compatible, but only the PCM is
834 if (ATARIHW_PRESENT(PCM_8BIT)) {
835 tt_dmasnd.ctrl = DMASND_CTRL_OFF;
836 udelay(20); /* wait a while for things to settle down */
838 mono_moni = (st_mfp.par_dt_reg & 0x80) == 0;
841 tt_encode_var(&atafb_predefined[0], &par);
846 #endif /* ATAFB_TT */
848 /* ------------------- Falcon specific functions ---------------------- */
852 static int mon_type; /* Falcon connected monitor */
853 static int f030_bus_width; /* Falcon ram bus width (for vid_control) */
859 static struct pixel_clock {
860 unsigned long f; /* f/[Hz] */
861 unsigned long t; /* t/[ps] (=1/f) */
862 int right, hsync, left; /* standard timing in clock cycles, not pixel */
863 /* hsync initialized in falcon_detect() */
864 int sync_mask; /* or-mask for hw.falcon.sync to set this clock */
865 int control_mask; /* ditto, for hw.falcon.vid_control */
867 25175000, 39721, 18, 0, 42, 0x0, VCO_CLOCK25
869 32000000, 31250, 18, 0, 42, 0x0, 0
871 0, 0, 18, 0, 42, 0x1, 0
874 /* VIDEL-prescale values [mon_type][pixel_length from VCO] */
875 static int vdl_prescale[4][3] = {
876 { 4,2,1 }, { 4,2,1 }, { 4,2,2 }, { 4,2,1 }
879 /* Default hsync timing [mon_type] in picoseconds */
880 static long h_syncs[4] = { 3000000, 4875000, 4000000, 4875000 };
882 static inline int hxx_prescale(struct falcon_hw *hw)
884 return hw->ste_mode ? 16
885 : vdl_prescale[mon_type][hw->vid_mode >> 2 & 0x3];
888 static int falcon_encode_fix(struct fb_fix_screeninfo *fix,
889 struct atafb_par *par)
891 strcpy(fix->id, "Atari Builtin");
892 fix->smem_start = (unsigned long)real_screen_base;
893 fix->smem_len = screen_len;
894 fix->type = FB_TYPE_INTERLEAVED_PLANES;
896 fix->visual = FB_VISUAL_PSEUDOCOLOR;
900 if (par->hw.falcon.mono) {
901 fix->type = FB_TYPE_PACKED_PIXELS;
903 /* no smooth scrolling with longword aligned video mem */
905 } else if (par->hw.falcon.f_shift & 0x100) {
906 fix->type = FB_TYPE_PACKED_PIXELS;
908 /* Is this ok or should it be DIRECTCOLOR? */
909 fix->visual = FB_VISUAL_TRUECOLOR;
912 fix->line_length = par->next_line;
913 fix->accel = FB_ACCEL_ATARIBLITT;
917 static int falcon_decode_var(struct fb_var_screeninfo *var,
918 struct atafb_par *par)
920 int bpp = var->bits_per_pixel;
921 int xres = var->xres;
922 int yres = var->yres;
923 int xres_virtual = var->xres_virtual;
924 int yres_virtual = var->yres_virtual;
925 int left_margin, right_margin, hsync_len;
926 int upper_margin, lower_margin, vsync_len;
928 int interlace = 0, doubleline = 0;
929 struct pixel_clock *pclock;
930 int plen; /* width of pixel in clock cycles */
935 int hdb_off, hde_off, base_off;
936 int gstart, gend1, gend2, align;
939 Get the video params out of 'var'. If a value doesn't fit, round
940 it up, if it's too big, return EINVAL.
941 Round up in the following order: bits_per_pixel, xres, yres,
942 xres_virtual, yres_virtual, xoffset, yoffset, grayscale, bitfields,
943 horizontal timing, vertical timing.
945 There is a maximum of screen resolution determined by pixelclock
946 and minimum frame rate -- (X+hmarg.)*(Y+vmarg.)*vfmin <= pixelclock.
947 In interlace mode this is " * " *vfmin <= pixelclock.
948 Additional constraints: hfreq.
949 Frequency range for multisync monitors is given via command line.
950 For TV and SM124 both frequencies are fixed.
952 X % 16 == 0 to fit 8x?? font (except 1 bitplane modes must use X%32 == 0)
953 Y % 16 == 0 to fit 8x16 font
956 Currently interlace and doubleline mode in var are ignored.
957 On SM124 and TV only the standard resolutions can be used.
960 /* Reject uninitialized mode */
961 if (!xres || !yres || !bpp)
964 if (mon_type == F_MON_SM && bpp != 1)
969 par->hw.falcon.f_shift = 0x400;
970 par->hw.falcon.st_shift = 0x200;
971 } else if (bpp <= 2) {
973 par->hw.falcon.f_shift = 0x000;
974 par->hw.falcon.st_shift = 0x100;
975 } else if (bpp <= 4) {
977 par->hw.falcon.f_shift = 0x000;
978 par->hw.falcon.st_shift = 0x000;
979 } else if (bpp <= 8) {
981 par->hw.falcon.f_shift = 0x010;
982 } else if (bpp <= 16) {
983 bpp = 16; /* packed pixel mode */
984 par->hw.falcon.f_shift = 0x100; /* hicolor, no overlay */
987 par->hw.falcon.bpp = bpp;
989 if (mon_type == F_MON_SM || DontCalcRes) {
990 /* Skip all calculations. VGA/TV/SC1224 only supported. */
991 struct fb_var_screeninfo *myvar = &atafb_predefined[0];
993 if (bpp > myvar->bits_per_pixel ||
994 var->xres > myvar->xres ||
995 var->yres > myvar->yres)
997 fbhw->get_par(par); /* Current par will be new par */
998 goto set_screen_base; /* Don't forget this */
1001 /* Only some fixed resolutions < 640x400 */
1004 else if (xres <= 640 && bpp != 16)
1008 else if (yres <= 240)
1010 else if (yres <= 400)
1013 /* 2 planes must use STE compatibility mode */
1014 par->hw.falcon.ste_mode = bpp == 2;
1015 par->hw.falcon.mono = bpp == 1;
1017 /* Total and visible scanline length must be a multiple of one longword,
1018 * this and the console fontwidth yields the alignment for xres and
1020 * TODO: this way "odd" fontheights are not supported
1022 * Special case in STE mode: blank and graphic positions don't align,
1023 * avoid trash at right margin
1025 if (par->hw.falcon.ste_mode)
1026 xres = (xres + 63) & ~63;
1028 xres = (xres + 31) & ~31;
1030 xres = (xres + 15) & ~15;
1032 yres = (yres + 15) & ~15;
1034 yres = (yres + 7) & ~7;
1036 if (xres_virtual < xres)
1037 xres_virtual = xres;
1039 xres_virtual = (xres_virtual + 31) & ~31;
1041 xres_virtual = (xres_virtual + 15) & ~15;
1043 if (yres_virtual <= 0)
1045 else if (yres_virtual < yres)
1046 yres_virtual = yres;
1048 /* backward bug-compatibility */
1049 if (var->pixclock > 1)
1052 par->hw.falcon.line_width = bpp * xres / 16;
1053 par->hw.falcon.line_offset = bpp * (xres_virtual - xres) / 16;
1055 /* single or double pixel width */
1056 xstretch = (xres < 640) ? 2 : 1;
1058 #if 0 /* SM124 supports only 640x400, this is rejected above */
1059 if (mon_type == F_MON_SM) {
1060 if (xres != 640 && yres != 400)
1064 /* SM124-mode is special */
1065 par->hw.falcon.ste_mode = 1;
1066 par->hw.falcon.f_shift = 0x000;
1067 par->hw.falcon.st_shift = 0x200;
1068 left_margin = hsync_len = 128 / plen;
1070 /* TODO set all margins */
1073 if (mon_type == F_MON_SC || mon_type == F_MON_TV) {
1074 plen = 2 * xstretch;
1075 if (var->pixclock > f32.t * plen)
1080 if (var->pixclock == 0) {
1081 /* set some minimal margins which center the screen */
1084 hsync_len = pclock->hsync / plen;
1087 vsync_len = interlace ? 3 : 4;
1089 left_margin = var->left_margin;
1090 right_margin = var->right_margin;
1091 hsync_len = var->hsync_len;
1092 upper_margin = var->upper_margin;
1093 lower_margin = var->lower_margin;
1094 vsync_len = var->vsync_len;
1095 if (var->vmode & FB_VMODE_INTERLACED) {
1096 upper_margin = (upper_margin + 1) / 2;
1097 lower_margin = (lower_margin + 1) / 2;
1098 vsync_len = (vsync_len + 1) / 2;
1099 } else if (var->vmode & FB_VMODE_DOUBLE) {
1105 } else { /* F_MON_VGA */
1107 xstretch = 2; /* Double pixel width only for hicolor */
1108 /* Default values are used for vert./hor. timing if no pixelclock given. */
1109 if (var->pixclock == 0) {
1112 /* Choose master pixelclock depending on hor. timing */
1113 plen = 1 * xstretch;
1114 if ((plen * xres + f25.right + f25.hsync + f25.left) *
1115 fb_info.monspecs.hfmin < f25.f)
1117 else if ((plen * xres + f32.right + f32.hsync +
1118 f32.left) * fb_info.monspecs.hfmin < f32.f)
1120 else if ((plen * xres + fext.right + fext.hsync +
1121 fext.left) * fb_info.monspecs.hfmin < fext.f &&
1127 left_margin = pclock->left / plen;
1128 right_margin = pclock->right / plen;
1129 hsync_len = pclock->hsync / plen;
1130 linesize = left_margin + xres + right_margin + hsync_len;
1135 /* Choose largest pixelclock <= wanted clock */
1137 unsigned long pcl = ULONG_MAX;
1139 for (i = 1; i <= 4; i *= 2) {
1140 if (f25.t * i >= var->pixclock &&
1145 if (f32.t * i >= var->pixclock &&
1150 if (fext.t && fext.t * i >= var->pixclock &&
1158 plen = pcl / pclock->t;
1160 left_margin = var->left_margin;
1161 right_margin = var->right_margin;
1162 hsync_len = var->hsync_len;
1163 upper_margin = var->upper_margin;
1164 lower_margin = var->lower_margin;
1165 vsync_len = var->vsync_len;
1166 /* Internal unit is [single lines per (half-)frame] */
1167 if (var->vmode & FB_VMODE_INTERLACED) {
1168 /* # lines in half frame */
1169 /* External unit is [lines per full frame] */
1170 upper_margin = (upper_margin + 1) / 2;
1171 lower_margin = (lower_margin + 1) / 2;
1172 vsync_len = (vsync_len + 1) / 2;
1173 } else if (var->vmode & FB_VMODE_DOUBLE) {
1174 /* External unit is [double lines per frame] */
1180 if (pclock == &fext)
1181 longoffset = 1; /* VIDEL doesn't synchronize on short offset */
1183 /* Is video bus bandwidth (32MB/s) too low for this resolution? */
1184 /* this is definitely wrong if bus clock != 32MHz */
1185 if (pclock->f / plen / 8 * bpp > 32000000L)
1191 /* include sync lengths in right/lower margin for all calculations */
1192 right_margin += hsync_len;
1193 lower_margin += vsync_len;
1195 /* ! In all calculations of margins we use # of lines in half frame
1196 * (which is a full frame in non-interlace mode), so we can switch
1197 * between interlace and non-interlace without messing around
1201 /* Set base_offset 128 and video bus width */
1202 par->hw.falcon.vid_control = mon_type | f030_bus_width;
1204 par->hw.falcon.vid_control |= VCO_SHORTOFFS; /* base_offset 64 */
1205 if (var->sync & FB_SYNC_HOR_HIGH_ACT)
1206 par->hw.falcon.vid_control |= VCO_HSYPOS;
1207 if (var->sync & FB_SYNC_VERT_HIGH_ACT)
1208 par->hw.falcon.vid_control |= VCO_VSYPOS;
1210 par->hw.falcon.vid_control |= pclock->control_mask;
1211 /* External or internal clock */
1212 par->hw.falcon.sync = pclock->sync_mask | 0x2;
1213 /* Pixellength and prescale */
1214 par->hw.falcon.vid_mode = (2 / plen) << 2;
1216 par->hw.falcon.vid_mode |= VMO_DOUBLE;
1218 par->hw.falcon.vid_mode |= VMO_INTER;
1220 /*********************
1221 * Horizontal timing: unit = [master clock cycles]
1222 * unit of hxx-registers: [master clock cycles * prescale]
1223 * Hxx-registers are 9 bit wide
1225 * 1 line = ((hht + 2) * 2 * prescale) clock cycles
1227 * graphic output = hdb & 0x200 ?
1228 * ((hht + 2) * 2 - hdb + hde) * prescale - hdboff + hdeoff:
1229 * (hht + 2 - hdb + hde) * prescale - hdboff + hdeoff
1230 * (this must be a multiple of plen*128/bpp, on VGA pixels
1231 * to the right may be cut off with a bigger right margin)
1233 * start of graphics relative to start of 1st halfline = hdb & 0x200 ?
1234 * (hdb - hht - 2) * prescale + hdboff :
1235 * hdb * prescale + hdboff
1237 * end of graphics relative to start of 1st halfline =
1238 * (hde + hht + 2) * prescale + hdeoff
1239 *********************/
1240 /* Calculate VIDEL registers */
1242 prescale = hxx_prescale(&par->hw.falcon);
1243 base_off = par->hw.falcon.vid_control & VCO_SHORTOFFS ? 64 : 128;
1245 /* Offsets depend on video mode */
1246 /* Offsets are in clock cycles, divide by prescale to
1247 * calculate hd[be]-registers
1249 if (par->hw.falcon.f_shift & 0x100) {
1252 hdb_off = (base_off + 16 * plen) + prescale;
1255 hde_off = ((128 / bpp + 2) * plen);
1256 if (par->hw.falcon.ste_mode)
1257 hdb_off = (64 + base_off + (128 / bpp + 2) * plen) + prescale;
1259 hdb_off = (base_off + (128 / bpp + 18) * plen) + prescale;
1262 gstart = (prescale / 2 + plen * left_margin) / prescale;
1263 /* gend1 is for hde (gend-gstart multiple of align), shifter's xres */
1264 gend1 = gstart + roundup(xres, align) * plen / prescale;
1265 /* gend2 is for hbb, visible xres (rest to gend1 is cut off by hblank) */
1266 gend2 = gstart + xres * plen / prescale;
1267 par->HHT = plen * (left_margin + xres + right_margin) /
1269 /* par->HHT = (gend2 + plen * right_margin / prescale) / 2 - 2;*/
1271 par->HDB = gstart - hdb_off / prescale;
1274 par->HDB += par->HHT + 2 + 0x200;
1275 par->HDE = gend1 - par->HHT - 2 - hde_off / prescale;
1276 par->HBB = gend2 - par->HHT - 2;
1278 /* One more Videl constraint: data fetch of two lines must not overlap */
1279 if ((par->HDB & 0x200) && (par->HDB & ~0x200) - par->HDE <= 5) {
1280 /* if this happens increase margins, decrease hfreq. */
1283 if (hde_off % prescale)
1284 par->HBB++; /* compensate for non matching hde and hbb */
1285 par->HSS = par->HHT + 2 - plen * hsync_len / prescale;
1286 if (par->HSS < par->HBB)
1287 par->HSS = par->HBB;
1290 /* check hor. frequency */
1291 hfreq = pclock->f / ((par->HHT + 2) * prescale * 2);
1292 if (hfreq > fb_info.monspecs.hfmax && mon_type != F_MON_VGA) {
1293 /* ++guenther: ^^^^^^^^^^^^^^^^^^^ can't remember why I did this */
1294 /* Too high -> enlarge margin */
1299 if (hfreq > fb_info.monspecs.hfmax || hfreq < fb_info.monspecs.hfmin)
1303 /* All Vxx must be odd in non-interlace, since frame starts in the middle
1304 * of the first displayed line!
1305 * One frame consists of VFT+1 half lines. VFT+1 must be even in
1306 * non-interlace, odd in interlace mode for synchronisation.
1307 * Vxx-registers are 11 bit wide
1309 par->VBE = (upper_margin * 2 + 1); /* must begin on odd halfline */
1310 par->VDB = par->VBE;
1315 par->VDE <<= 1; /* VDE now half lines per (half-)frame */
1316 par->VDE += par->VDB;
1317 par->VBB = par->VDE;
1318 par->VFT = par->VBB + (lower_margin * 2 - 1) - 1;
1319 par->VSS = par->VFT + 1 - (vsync_len * 2 - 1);
1320 /* vbb,vss,vft must be even in interlace mode */
1327 /* V-frequency check, hope I didn't create any loop here. */
1328 /* Interlace and doubleline are mutually exclusive. */
1329 vfreq = (hfreq * 2) / (par->VFT + 1);
1330 if (vfreq > fb_info.monspecs.vfmax && !doubleline && !interlace) {
1331 /* Too high -> try again with doubleline */
1334 } else if (vfreq < fb_info.monspecs.vfmin && !interlace && !doubleline) {
1335 /* Too low -> try again with interlace */
1338 } else if (vfreq < fb_info.monspecs.vfmin && doubleline) {
1339 /* Doubleline too low -> clear doubleline and enlarge margins */
1343 (hfreq * 2) / (par->VFT + 1 + 4 * lines - 2 * yres) >
1344 fb_info.monspecs.vfmax;
1347 upper_margin += lines;
1348 lower_margin += lines;
1350 } else if (vfreq > fb_info.monspecs.vfmax && doubleline) {
1351 /* Doubleline too high -> enlarge margins */
1354 (hfreq * 2) / (par->VFT + 1 + 4 * lines) >
1355 fb_info.monspecs.vfmax;
1358 upper_margin += lines;
1359 lower_margin += lines;
1361 } else if (vfreq > fb_info.monspecs.vfmax && interlace) {
1362 /* Interlace, too high -> enlarge margins */
1365 (hfreq * 2) / (par->VFT + 1 + 4 * lines) >
1366 fb_info.monspecs.vfmax;
1369 upper_margin += lines;
1370 lower_margin += lines;
1372 } else if (vfreq < fb_info.monspecs.vfmin ||
1373 vfreq > fb_info.monspecs.vfmax)
1377 linelen = xres_virtual * bpp / 8;
1378 if (yres_virtual * linelen > screen_len && screen_len)
1380 if (yres * linelen > screen_len && screen_len)
1382 if (var->yoffset + yres > yres_virtual && yres_virtual)
1384 par->yres_virtual = yres_virtual;
1385 par->screen_base = screen_base + var->yoffset * linelen;
1386 par->hw.falcon.xoffset = 0;
1388 par->next_line = linelen;
1393 static int falcon_encode_var(struct fb_var_screeninfo *var,
1394 struct atafb_par *par)
1396 /* !!! only for VGA !!! */
1399 int hdb_off, hde_off, base_off;
1400 struct falcon_hw *hw = &par->hw.falcon;
1402 memset(var, 0, sizeof(struct fb_var_screeninfo));
1403 /* possible frequencies: 25.175 or 32MHz */
1404 var->pixclock = hw->sync & 0x1 ? fext.t :
1405 hw->vid_control & VCO_CLOCK25 ? f25.t : f32.t;
1411 if (hw->vid_control & VCO_HSYPOS)
1412 var->sync |= FB_SYNC_HOR_HIGH_ACT;
1413 if (hw->vid_control & VCO_VSYPOS)
1414 var->sync |= FB_SYNC_VERT_HIGH_ACT;
1416 var->vmode = FB_VMODE_NONINTERLACED;
1417 if (hw->vid_mode & VMO_INTER)
1418 var->vmode |= FB_VMODE_INTERLACED;
1419 if (hw->vid_mode & VMO_DOUBLE)
1420 var->vmode |= FB_VMODE_DOUBLE;
1422 /* visible y resolution:
1423 * Graphics display starts at line VDB and ends at line
1424 * VDE. If interlace mode off unit of VC-registers is
1425 * half lines, else lines.
1427 var->yres = hw->vde - hw->vdb;
1428 if (!(var->vmode & FB_VMODE_INTERLACED))
1430 if (var->vmode & FB_VMODE_DOUBLE)
1434 * to get bpp, we must examine f_shift and st_shift.
1435 * f_shift is valid if any of bits no. 10, 8 or 4
1436 * is set. Priority in f_shift is: 10 ">" 8 ">" 4, i.e.
1437 * if bit 10 set then bit 8 and bit 4 don't care...
1438 * If all these bits are 0 get display depth from st_shift
1439 * (as for ST and STE)
1441 if (hw->f_shift & 0x400) /* 2 colors */
1442 var->bits_per_pixel = 1;
1443 else if (hw->f_shift & 0x100) /* hicolor */
1444 var->bits_per_pixel = 16;
1445 else if (hw->f_shift & 0x010) /* 8 bitplanes */
1446 var->bits_per_pixel = 8;
1447 else if (hw->st_shift == 0)
1448 var->bits_per_pixel = 4;
1449 else if (hw->st_shift == 0x100)
1450 var->bits_per_pixel = 2;
1451 else /* if (hw->st_shift == 0x200) */
1452 var->bits_per_pixel = 1;
1454 var->xres = hw->line_width * 16 / var->bits_per_pixel;
1455 var->xres_virtual = var->xres + hw->line_offset * 16 / var->bits_per_pixel;
1457 var->xres_virtual += 16;
1459 if (var->bits_per_pixel == 16) {
1460 var->red.offset = 11;
1461 var->red.length = 5;
1462 var->red.msb_right = 0;
1463 var->green.offset = 5;
1464 var->green.length = 6;
1465 var->green.msb_right = 0;
1466 var->blue.offset = 0;
1467 var->blue.length = 5;
1468 var->blue.msb_right = 0;
1470 var->red.offset = 0;
1471 var->red.length = hw->ste_mode ? 4 : 6;
1472 if (var->red.length > var->bits_per_pixel)
1473 var->red.length = var->bits_per_pixel;
1474 var->red.msb_right = 0;
1476 var->blue = var->green = var->red;
1478 var->transp.offset = 0;
1479 var->transp.length = 0;
1480 var->transp.msb_right = 0;
1482 linelen = var->xres_virtual * var->bits_per_pixel / 8;
1484 if (par->yres_virtual)
1485 var->yres_virtual = par->yres_virtual;
1487 /* yres_virtual == 0 means use maximum */
1488 var->yres_virtual = screen_len / linelen;
1491 var->yres_virtual = 2 * var->yres;
1493 var->yres_virtual = var->yres + hwscroll * 16;
1495 var->xoffset = 0; /* TODO change this */
1498 prescale = hxx_prescale(hw);
1499 plen = 4 >> (hw->vid_mode >> 2 & 0x3);
1500 base_off = hw->vid_control & VCO_SHORTOFFS ? 64 : 128;
1501 if (hw->f_shift & 0x100) {
1503 hdb_off = (base_off + 16 * plen) + prescale;
1505 hde_off = ((128 / var->bits_per_pixel + 2) * plen);
1507 hdb_off = (64 + base_off + (128 / var->bits_per_pixel + 2) * plen)
1510 hdb_off = (base_off + (128 / var->bits_per_pixel + 18) * plen)
1514 /* Right margin includes hsync */
1515 var->left_margin = hdb_off + prescale * ((hw->hdb & 0x1ff) -
1516 (hw->hdb & 0x200 ? 2 + hw->hht : 0));
1517 if (hw->ste_mode || mon_type != F_MON_VGA)
1518 var->right_margin = prescale * (hw->hht + 2 - hw->hde) - hde_off;
1520 /* can't use this in ste_mode, because hbb is +1 off */
1521 var->right_margin = prescale * (hw->hht + 2 - hw->hbb);
1522 var->hsync_len = prescale * (hw->hht + 2 - hw->hss);
1524 /* Lower margin includes vsync */
1525 var->upper_margin = hw->vdb / 2; /* round down to full lines */
1526 var->lower_margin = (hw->vft + 1 - hw->vde + 1) / 2; /* round up */
1527 var->vsync_len = (hw->vft + 1 - hw->vss + 1) / 2; /* round up */
1528 if (var->vmode & FB_VMODE_INTERLACED) {
1529 var->upper_margin *= 2;
1530 var->lower_margin *= 2;
1531 var->vsync_len *= 2;
1532 } else if (var->vmode & FB_VMODE_DOUBLE) {
1533 var->upper_margin = (var->upper_margin + 1) / 2;
1534 var->lower_margin = (var->lower_margin + 1) / 2;
1535 var->vsync_len = (var->vsync_len + 1) / 2;
1538 var->pixclock *= plen;
1539 var->left_margin /= plen;
1540 var->right_margin /= plen;
1541 var->hsync_len /= plen;
1543 var->right_margin -= var->hsync_len;
1544 var->lower_margin -= var->vsync_len;
1547 var->yoffset = (par->screen_base - screen_base) / linelen;
1550 var->nonstd = 0; /* what is this for? */
1555 static int f_change_mode;
1556 static struct falcon_hw f_new_mode;
1557 static int f_pan_display;
1559 static void falcon_get_par(struct atafb_par *par)
1562 struct falcon_hw *hw = &par->hw.falcon;
1564 hw->line_width = shifter_f030.scn_width;
1565 hw->line_offset = shifter_f030.off_next;
1566 hw->st_shift = videl.st_shift & 0x300;
1567 hw->f_shift = videl.f_shift;
1568 hw->vid_control = videl.control;
1569 hw->vid_mode = videl.mode;
1570 hw->sync = shifter.syncmode & 0x1;
1571 hw->xoffset = videl.xoffset & 0xf;
1572 hw->hht = videl.hht;
1573 hw->hbb = videl.hbb;
1574 hw->hbe = videl.hbe;
1575 hw->hdb = videl.hdb;
1576 hw->hde = videl.hde;
1577 hw->hss = videl.hss;
1578 hw->vft = videl.vft;
1579 hw->vbb = videl.vbb;
1580 hw->vbe = videl.vbe;
1581 hw->vdb = videl.vdb;
1582 hw->vde = videl.vde;
1583 hw->vss = videl.vss;
1585 addr = (shifter.bas_hi & 0xff) << 16 |
1586 (shifter.bas_md & 0xff) << 8 |
1587 (shifter.bas_lo & 0xff);
1588 par->screen_base = phys_to_virt(addr);
1590 /* derived parameters */
1591 hw->ste_mode = (hw->f_shift & 0x510) == 0 && hw->st_shift == 0x100;
1592 hw->mono = (hw->f_shift & 0x400) ||
1593 ((hw->f_shift & 0x510) == 0 && hw->st_shift == 0x200);
1596 static void falcon_set_par(struct atafb_par *par)
1600 /* only set screen_base if really necessary */
1601 if (current_par.screen_base != par->screen_base)
1602 fbhw->set_screen_base(par->screen_base);
1604 /* Don't touch any other registers if we keep the default resolution */
1608 /* Tell vbl-handler to change video mode.
1609 * We change modes only on next VBL, to avoid desynchronisation
1610 * (a shift to the right and wrap around by a random number of pixels
1611 * in all monochrome modes).
1612 * This seems to work on my Falcon.
1614 f_new_mode = par->hw.falcon;
1618 static irqreturn_t falcon_vbl_switcher(int irq, void *dummy)
1620 struct falcon_hw *hw = &f_new_mode;
1622 if (f_change_mode) {
1625 if (hw->sync & 0x1) {
1626 /* Enable external pixelclock. This code only for ScreenWonder */
1627 *(volatile unsigned short *)0xffff9202 = 0xffbf;
1629 /* Turn off external clocks. Read sets all output bits to 1. */
1630 *(volatile unsigned short *)0xffff9202;
1632 shifter.syncmode = hw->sync;
1634 videl.hht = hw->hht;
1635 videl.hbb = hw->hbb;
1636 videl.hbe = hw->hbe;
1637 videl.hdb = hw->hdb;
1638 videl.hde = hw->hde;
1639 videl.hss = hw->hss;
1640 videl.vft = hw->vft;
1641 videl.vbb = hw->vbb;
1642 videl.vbe = hw->vbe;
1643 videl.vdb = hw->vdb;
1644 videl.vde = hw->vde;
1645 videl.vss = hw->vss;
1647 videl.f_shift = 0; /* write enables Falcon palette, 0: 4 planes */
1649 videl.st_shift = hw->st_shift; /* write enables STE palette */
1652 * set st_shift 0, so we can tell the screen-depth if f_shift == 0.
1653 * Writing 0 to f_shift enables 4 plane Falcon mode but
1654 * doesn't set st_shift. st_shift != 0 (!= 4planes) is impossible
1655 * with Falcon palette.
1658 /* now back to Falcon palette mode */
1659 videl.f_shift = hw->f_shift;
1661 /* writing to st_shift changed scn_width and vid_mode */
1662 videl.xoffset = hw->xoffset;
1663 shifter_f030.scn_width = hw->line_width;
1664 shifter_f030.off_next = hw->line_offset;
1665 videl.control = hw->vid_control;
1666 videl.mode = hw->vid_mode;
1668 if (f_pan_display) {
1670 videl.xoffset = current_par.hw.falcon.xoffset;
1671 shifter_f030.off_next = current_par.hw.falcon.line_offset;
1676 static int falcon_pan_display(struct fb_var_screeninfo *var,
1677 struct fb_info *info)
1679 struct atafb_par *par = (struct atafb_par *)info->par;
1682 int bpp = info->var.bits_per_pixel;
1685 var->xoffset = up(var->xoffset, 32);
1687 par->hw.falcon.xoffset = var->xoffset & 15;
1689 par->hw.falcon.xoffset = 0;
1690 var->xoffset = up(var->xoffset, 2);
1692 par->hw.falcon.line_offset = bpp *
1693 (info->var.xres_virtual - info->var.xres) / 16;
1694 if (par->hw.falcon.xoffset)
1695 par->hw.falcon.line_offset -= bpp;
1696 xoffset = var->xoffset - par->hw.falcon.xoffset;
1698 par->screen_base = screen_base +
1699 (var->yoffset * info->var.xres_virtual + xoffset) * bpp / 8;
1700 if (fbhw->set_screen_base)
1701 fbhw->set_screen_base(par->screen_base);
1703 return -EINVAL; /* shouldn't happen */
1708 static int falcon_setcolreg(unsigned int regno, unsigned int red,
1709 unsigned int green, unsigned int blue,
1710 unsigned int transp, struct fb_info *info)
1714 f030_col[regno] = (((red & 0xfc00) << 16) |
1715 ((green & 0xfc00) << 8) |
1716 ((blue & 0xfc00) >> 8));
1718 shifter_tt.color_reg[regno] =
1719 (((red & 0xe000) >> 13) | ((red & 0x1000) >> 12) << 8) |
1720 (((green & 0xe000) >> 13) | ((green & 0x1000) >> 12) << 4) |
1721 ((blue & 0xe000) >> 13) | ((blue & 0x1000) >> 12);
1723 ((u32 *)info->pseudo_palette)[regno] = ((red & 0xf800) |
1724 ((green & 0xfc00) >> 5) |
1725 ((blue & 0xf800) >> 11));
1731 static int falcon_blank(int blank_mode)
1733 /* ++guenther: we can switch off graphics by changing VDB and VDE,
1734 * so VIDEL doesn't hog the bus while saving.
1735 * (this may affect usleep()).
1737 int vdb, vss, hbe, hss;
1739 if (mon_type == F_MON_SM) /* this doesn't work on SM124 */
1742 vdb = current_par.VDB;
1743 vss = current_par.VSS;
1744 hbe = current_par.HBE;
1745 hss = current_par.HSS;
1747 if (blank_mode >= 1) {
1748 /* disable graphics output (this speeds up the CPU) ... */
1749 vdb = current_par.VFT + 1;
1750 /* ... and blank all lines */
1751 hbe = current_par.HHT + 2;
1753 /* use VESA suspend modes on VGA monitors */
1754 if (mon_type == F_MON_VGA) {
1755 if (blank_mode == 2 || blank_mode == 4)
1756 vss = current_par.VFT + 1;
1757 if (blank_mode == 3 || blank_mode == 4)
1758 hss = current_par.HHT + 2;
1769 static int falcon_detect(void)
1771 struct atafb_par par;
1774 /* Determine connected monitor and set monitor parameters */
1775 fhw = *(unsigned char *)0xffff8006;
1776 mon_type = fhw >> 6 & 0x3;
1777 /* bit 1 of fhw: 1=32 bit ram bus, 0=16 bit */
1778 f030_bus_width = fhw << 6 & 0x80;
1781 fb_info.monspecs.vfmin = 70;
1782 fb_info.monspecs.vfmax = 72;
1783 fb_info.monspecs.hfmin = 35713;
1784 fb_info.monspecs.hfmax = 35715;
1789 fb_info.monspecs.vfmin = 49; /* not 50, since TOS defaults to 49.9x Hz */
1790 fb_info.monspecs.vfmax = 60;
1791 fb_info.monspecs.hfmin = 15620;
1792 fb_info.monspecs.hfmax = 15755;
1795 /* initialize hsync-len */
1796 f25.hsync = h_syncs[mon_type] / f25.t;
1797 f32.hsync = h_syncs[mon_type] / f32.t;
1799 fext.hsync = h_syncs[mon_type] / fext.t;
1801 falcon_get_par(&par);
1802 falcon_encode_var(&atafb_predefined[0], &par);
1804 /* Detected mode is always the "autodetect" slot */
1808 #endif /* ATAFB_FALCON */
1810 /* ------------------- ST(E) specific functions ---------------------- */
1814 static int stste_encode_fix(struct fb_fix_screeninfo *fix,
1815 struct atafb_par *par)
1819 strcpy(fix->id, "Atari Builtin");
1820 fix->smem_start = (unsigned long)real_screen_base;
1821 fix->smem_len = screen_len;
1822 fix->type = FB_TYPE_INTERLEAVED_PLANES;
1824 fix->visual = FB_VISUAL_PSEUDOCOLOR;
1825 mode = par->hw.st.mode & 3;
1826 if (mode == ST_HIGH) {
1827 fix->type = FB_TYPE_PACKED_PIXELS;
1829 fix->visual = FB_VISUAL_MONO10;
1831 if (ATARIHW_PRESENT(EXTD_SHIFTER)) {
1839 fix->line_length = par->next_line;
1840 fix->accel = FB_ACCEL_ATARIBLITT;
1844 static int stste_decode_var(struct fb_var_screeninfo *var,
1845 struct atafb_par *par)
1847 int xres = var->xres;
1848 int yres = var->yres;
1849 int bpp = var->bits_per_pixel;
1851 int yres_virtual = var->yres_virtual;
1854 if (bpp > 1 || xres > sttt_xres || yres > st_yres)
1856 par->hw.st.mode = ST_HIGH;
1861 if (bpp > 4 || xres > sttt_xres || yres > st_yres)
1864 if (xres > sttt_xres / 2 || yres > st_yres / 2)
1866 par->hw.st.mode = ST_LOW;
1867 xres = sttt_xres / 2;
1870 } else if (bpp > 1) {
1871 if (xres > sttt_xres || yres > st_yres / 2)
1873 par->hw.st.mode = ST_MID;
1880 if (yres_virtual <= 0)
1882 else if (yres_virtual < yres)
1883 yres_virtual = yres;
1884 if (var->sync & FB_SYNC_EXT)
1885 par->hw.st.sync = (par->hw.st.sync & ~1) | 1;
1887 par->hw.st.sync = (par->hw.st.sync & ~1);
1888 linelen = xres * bpp / 8;
1889 if (yres_virtual * linelen > screen_len && screen_len)
1891 if (yres * linelen > screen_len && screen_len)
1893 if (var->yoffset + yres > yres_virtual && yres_virtual)
1895 par->yres_virtual = yres_virtual;
1896 par->screen_base = screen_base + var->yoffset * linelen;
1897 par->next_line = linelen;
1901 static int stste_encode_var(struct fb_var_screeninfo *var,
1902 struct atafb_par *par)
1905 memset(var, 0, sizeof(struct fb_var_screeninfo));
1906 var->red.offset = 0;
1907 var->red.length = ATARIHW_PRESENT(EXTD_SHIFTER) ? 4 : 3;
1908 var->red.msb_right = 0;
1911 var->pixclock = 31041;
1912 var->left_margin = 120; /* these are incorrect */
1913 var->right_margin = 100;
1914 var->upper_margin = 8;
1915 var->lower_margin = 16;
1916 var->hsync_len = 140;
1917 var->vsync_len = 30;
1922 if (!(par->hw.st.sync & 1))
1925 var->sync = FB_SYNC_EXT;
1927 switch (par->hw.st.mode & 3) {
1929 var->xres = sttt_xres / 2;
1930 var->yres = st_yres / 2;
1931 var->bits_per_pixel = 4;
1934 var->xres = sttt_xres;
1935 var->yres = st_yres / 2;
1936 var->bits_per_pixel = 2;
1939 var->xres = sttt_xres;
1940 var->yres = st_yres;
1941 var->bits_per_pixel = 1;
1944 var->blue = var->green = var->red;
1945 var->transp.offset = 0;
1946 var->transp.length = 0;
1947 var->transp.msb_right = 0;
1948 var->xres_virtual = sttt_xres_virtual;
1949 linelen = var->xres_virtual * var->bits_per_pixel / 8;
1950 ovsc_addlen = linelen * (sttt_yres_virtual - st_yres);
1953 var->yres_virtual = var->yres;
1954 else if (screen_len) {
1955 if (par->yres_virtual)
1956 var->yres_virtual = par->yres_virtual;
1958 /* yres_virtual == 0 means use maximum */
1959 var->yres_virtual = screen_len / linelen;
1962 var->yres_virtual = 2 * var->yres;
1964 var->yres_virtual = var->yres + hwscroll * 16;
1968 var->yoffset = (par->screen_base - screen_base) / linelen;
1973 var->vmode = FB_VMODE_NONINTERLACED;
1977 static void stste_get_par(struct atafb_par *par)
1980 par->hw.st.mode = shifter_tt.st_shiftmode;
1981 par->hw.st.sync = shifter.syncmode;
1982 addr = ((shifter.bas_hi & 0xff) << 16) |
1983 ((shifter.bas_md & 0xff) << 8);
1984 if (ATARIHW_PRESENT(EXTD_SHIFTER))
1985 addr |= (shifter.bas_lo & 0xff);
1986 par->screen_base = phys_to_virt(addr);
1989 static void stste_set_par(struct atafb_par *par)
1991 shifter_tt.st_shiftmode = par->hw.st.mode;
1992 shifter.syncmode = par->hw.st.sync;
1993 /* only set screen_base if really necessary */
1994 if (current_par.screen_base != par->screen_base)
1995 fbhw->set_screen_base(par->screen_base);
1998 static int stste_setcolreg(unsigned int regno, unsigned int red,
1999 unsigned int green, unsigned int blue,
2000 unsigned int transp, struct fb_info *info)
2007 if (ATARIHW_PRESENT(EXTD_SHIFTER))
2008 shifter_tt.color_reg[regno] =
2009 (((red & 0xe) >> 1) | ((red & 1) << 3) << 8) |
2010 (((green & 0xe) >> 1) | ((green & 1) << 3) << 4) |
2011 ((blue & 0xe) >> 1) | ((blue & 1) << 3);
2013 shifter_tt.color_reg[regno] =
2014 ((red & 0xe) << 7) |
2015 ((green & 0xe) << 3) |
2016 ((blue & 0xe) >> 1);
2020 static int stste_detect(void)
2022 struct atafb_par par;
2024 /* Determine the connected monitor: The DMA sound must be
2025 * disabled before reading the MFP GPIP, because the Sound
2026 * Done Signal and the Monochrome Detect are XORed together!
2028 if (ATARIHW_PRESENT(PCM_8BIT)) {
2029 tt_dmasnd.ctrl = DMASND_CTRL_OFF;
2030 udelay(20); /* wait a while for things to settle down */
2032 mono_moni = (st_mfp.par_dt_reg & 0x80) == 0;
2034 stste_get_par(&par);
2035 stste_encode_var(&atafb_predefined[0], &par);
2037 if (!ATARIHW_PRESENT(EXTD_SHIFTER))
2042 static void stste_set_screen_base(void *s_base)
2045 addr = virt_to_phys(s_base);
2046 /* Setup Screen Memory */
2047 shifter.bas_hi = (unsigned char)((addr & 0xff0000) >> 16);
2048 shifter.bas_md = (unsigned char)((addr & 0x00ff00) >> 8);
2049 if (ATARIHW_PRESENT(EXTD_SHIFTER))
2050 shifter.bas_lo = (unsigned char)(addr & 0x0000ff);
2053 #endif /* ATAFB_STE */
2055 /* Switching the screen size should be done during vsync, otherwise
2056 * the margins may get messed up. This is a well known problem of
2057 * the ST's video system.
2059 * Unfortunately there is hardly any way to find the vsync, as the
2060 * vertical blank interrupt is no longer in time on machines with
2061 * overscan type modifications.
2063 * We can, however, use Timer B to safely detect the black shoulder,
2064 * but then we've got to guess an appropriate delay to find the vsync.
2065 * This might not work on every machine.
2067 * martin_rogge @ ki.maus.de, 8th Aug 1995
2070 #define LINE_DELAY (mono_moni ? 30 : 70)
2071 #define SYNC_DELAY (mono_moni ? 1500 : 2000)
2073 /* SWITCH_ACIA may be used for Falcon (ScreenBlaster III internal!) */
2074 static void st_ovsc_switch(void)
2076 unsigned long flags;
2077 register unsigned char old, new;
2079 if (!(atari_switches & ATARI_SWITCH_OVSC_MASK))
2081 local_irq_save(flags);
2083 st_mfp.tim_ct_b = 0x10;
2084 st_mfp.active_edge |= 8;
2085 st_mfp.tim_ct_b = 0;
2086 st_mfp.tim_dt_b = 0xf0;
2087 st_mfp.tim_ct_b = 8;
2088 while (st_mfp.tim_dt_b > 1) /* TOS does it this way, don't ask why */
2090 new = st_mfp.tim_dt_b;
2094 new = st_mfp.tim_dt_b;
2095 } while (old != new);
2096 st_mfp.tim_ct_b = 0x10;
2099 if (atari_switches & ATARI_SWITCH_OVSC_IKBD)
2100 acia.key_ctrl = ACIA_DIV64 | ACIA_D8N1S | ACIA_RHTID | ACIA_RIE;
2101 if (atari_switches & ATARI_SWITCH_OVSC_MIDI)
2102 acia.mid_ctrl = ACIA_DIV16 | ACIA_D8N1S | ACIA_RHTID;
2103 if (atari_switches & (ATARI_SWITCH_OVSC_SND6|ATARI_SWITCH_OVSC_SND7)) {
2104 sound_ym.rd_data_reg_sel = 14;
2105 sound_ym.wd_data = sound_ym.rd_data_reg_sel |
2106 ((atari_switches & ATARI_SWITCH_OVSC_SND6) ? 0x40:0) |
2107 ((atari_switches & ATARI_SWITCH_OVSC_SND7) ? 0x80:0);
2109 local_irq_restore(flags);
2112 /* ------------------- External Video ---------------------- */
2116 static int ext_encode_fix(struct fb_fix_screeninfo *fix, struct atafb_par *par)
2118 strcpy(fix->id, "Unknown Extern");
2119 fix->smem_start = (unsigned long)external_addr;
2120 fix->smem_len = PAGE_ALIGN(external_len);
2121 if (external_depth == 1) {
2122 fix->type = FB_TYPE_PACKED_PIXELS;
2123 /* The letters 'n' and 'i' in the "atavideo=external:" stand
2124 * for "normal" and "inverted", rsp., in the monochrome case */
2126 (external_pmode == FB_TYPE_INTERLEAVED_PLANES ||
2127 external_pmode == FB_TYPE_PACKED_PIXELS) ?
2128 FB_VISUAL_MONO10 : FB_VISUAL_MONO01;
2130 /* Use STATIC if we don't know how to access color registers */
2131 int visual = external_vgaiobase ?
2132 FB_VISUAL_PSEUDOCOLOR :
2133 FB_VISUAL_STATIC_PSEUDOCOLOR;
2134 switch (external_pmode) {
2135 case -1: /* truecolor */
2136 fix->type = FB_TYPE_PACKED_PIXELS;
2137 fix->visual = FB_VISUAL_TRUECOLOR;
2139 case FB_TYPE_PACKED_PIXELS:
2140 fix->type = FB_TYPE_PACKED_PIXELS;
2141 fix->visual = visual;
2143 case FB_TYPE_PLANES:
2144 fix->type = FB_TYPE_PLANES;
2145 fix->visual = visual;
2147 case FB_TYPE_INTERLEAVED_PLANES:
2148 fix->type = FB_TYPE_INTERLEAVED_PLANES;
2150 fix->visual = visual;
2157 fix->line_length = par->next_line;
2161 static int ext_decode_var(struct fb_var_screeninfo *var, struct atafb_par *par)
2163 struct fb_var_screeninfo *myvar = &atafb_predefined[0];
2165 if (var->bits_per_pixel > myvar->bits_per_pixel ||
2166 var->xres > myvar->xres ||
2167 var->xres_virtual > myvar->xres_virtual ||
2168 var->yres > myvar->yres ||
2173 par->next_line = external_xres_virtual * external_depth / 8;
2177 static int ext_encode_var(struct fb_var_screeninfo *var, struct atafb_par *par)
2179 memset(var, 0, sizeof(struct fb_var_screeninfo));
2180 var->red.offset = 0;
2181 var->red.length = (external_pmode == -1) ? external_depth / 3 :
2182 (external_vgaiobase ? external_bitspercol : 0);
2183 var->red.msb_right = 0;
2186 var->pixclock = 31041;
2187 var->left_margin = 120; /* these are surely incorrect */
2188 var->right_margin = 100;
2189 var->upper_margin = 8;
2190 var->lower_margin = 16;
2191 var->hsync_len = 140;
2192 var->vsync_len = 30;
2199 var->xres = external_xres;
2200 var->yres = external_yres;
2201 var->xres_virtual = external_xres_virtual;
2202 var->bits_per_pixel = external_depth;
2204 var->blue = var->green = var->red;
2205 var->transp.offset = 0;
2206 var->transp.length = 0;
2207 var->transp.msb_right = 0;
2208 var->yres_virtual = var->yres;
2213 var->vmode = FB_VMODE_NONINTERLACED;
2217 static void ext_get_par(struct atafb_par *par)
2219 par->screen_base = external_addr;
2222 static void ext_set_par(struct atafb_par *par)
2226 #define OUTB(port,val) \
2227 *((unsigned volatile char *) ((port)+external_vgaiobase)) = (val)
2229 (*((unsigned volatile char *) ((port)+external_vgaiobase)))
2232 unsigned char tmp = INB(0x3da); \
2236 static int ext_setcolreg(unsigned int regno, unsigned int red,
2237 unsigned int green, unsigned int blue,
2238 unsigned int transp, struct fb_info *info)
2240 unsigned char colmask = (1 << external_bitspercol) - 1;
2242 if (!external_vgaiobase)
2251 switch (external_card_type) {
2255 OUTB(0x3c9, red & colmask);
2257 OUTB(0x3c9, green & colmask);
2259 OUTB(0x3c9, blue & colmask);
2264 OUTB((MV300_reg[regno] << 2) + 1, red);
2265 OUTB((MV300_reg[regno] << 2) + 1, green);
2266 OUTB((MV300_reg[regno] << 2) + 1, blue);
2274 static int ext_detect(void)
2276 struct fb_var_screeninfo *myvar = &atafb_predefined[0];
2277 struct atafb_par dummy_par;
2279 myvar->xres = external_xres;
2280 myvar->xres_virtual = external_xres_virtual;
2281 myvar->yres = external_yres;
2282 myvar->bits_per_pixel = external_depth;
2283 ext_encode_var(myvar, &dummy_par);
2287 #endif /* ATAFB_EXT */
2289 /* ------ This is the same for most hardware types -------- */
2291 static void set_screen_base(void *s_base)
2295 addr = virt_to_phys(s_base);
2296 /* Setup Screen Memory */
2297 shifter.bas_hi = (unsigned char)((addr & 0xff0000) >> 16);
2298 shifter.bas_md = (unsigned char)((addr & 0x00ff00) >> 8);
2299 shifter.bas_lo = (unsigned char)(addr & 0x0000ff);
2302 static int pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
2304 struct atafb_par *par = (struct atafb_par *)info->par;
2306 if (!fbhw->set_screen_base ||
2307 (!ATARIHW_PRESENT(EXTD_SHIFTER) && var->xoffset))
2309 var->xoffset = up(var->xoffset, 16);
2310 par->screen_base = screen_base +
2311 (var->yoffset * info->var.xres_virtual + var->xoffset)
2312 * info->var.bits_per_pixel / 8;
2313 fbhw->set_screen_base(par->screen_base);
2317 /* ------------ Interfaces to hardware functions ------------ */
2320 static struct fb_hwswitch tt_switch = {
2321 .detect = tt_detect,
2322 .encode_fix = tt_encode_fix,
2323 .decode_var = tt_decode_var,
2324 .encode_var = tt_encode_var,
2325 .get_par = tt_get_par,
2326 .set_par = tt_set_par,
2327 .set_screen_base = set_screen_base,
2328 .pan_display = pan_display,
2333 static struct fb_hwswitch falcon_switch = {
2334 .detect = falcon_detect,
2335 .encode_fix = falcon_encode_fix,
2336 .decode_var = falcon_decode_var,
2337 .encode_var = falcon_encode_var,
2338 .get_par = falcon_get_par,
2339 .set_par = falcon_set_par,
2340 .set_screen_base = set_screen_base,
2341 .blank = falcon_blank,
2342 .pan_display = falcon_pan_display,
2347 static struct fb_hwswitch st_switch = {
2348 .detect = stste_detect,
2349 .encode_fix = stste_encode_fix,
2350 .decode_var = stste_decode_var,
2351 .encode_var = stste_encode_var,
2352 .get_par = stste_get_par,
2353 .set_par = stste_set_par,
2354 .set_screen_base = stste_set_screen_base,
2355 .pan_display = pan_display
2360 static struct fb_hwswitch ext_switch = {
2361 .detect = ext_detect,
2362 .encode_fix = ext_encode_fix,
2363 .decode_var = ext_decode_var,
2364 .encode_var = ext_encode_var,
2365 .get_par = ext_get_par,
2366 .set_par = ext_set_par,
2370 static void ata_get_par(struct atafb_par *par)
2372 if (current_par_valid)
2378 static void ata_set_par(struct atafb_par *par)
2382 current_par_valid = 1;
2386 /* =========================================================== */
2387 /* ============== Hardware Independent Functions ============= */
2388 /* =========================================================== */
2390 /* used for hardware scrolling */
2392 static int do_fb_set_var(struct fb_var_screeninfo *var, int isactive)
2395 struct atafb_par par;
2397 err = fbhw->decode_var(var, &par);
2400 activate = var->activate;
2401 if (((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) && isactive)
2403 fbhw->encode_var(var, &par);
2404 var->activate = activate;
2408 /* fbhw->encode_fix() must be called with fb_info->mm_lock held
2409 * if it is called after the register_framebuffer() - not a case here
2411 static int atafb_get_fix(struct fb_fix_screeninfo *fix, struct fb_info *info)
2413 struct atafb_par par;
2415 // Get fix directly (case con == -1 before)??
2416 err = fbhw->decode_var(&info->var, &par);
2419 memset(fix, 0, sizeof(struct fb_fix_screeninfo));
2420 err = fbhw->encode_fix(fix, &par);
2424 static int atafb_get_var(struct fb_var_screeninfo *var, struct fb_info *info)
2426 struct atafb_par par;
2429 fbhw->encode_var(var, &par);
2434 // No longer called by fbcon!
2435 // Still called by set_var internally
2437 static void atafb_set_disp(struct fb_info *info)
2439 atafb_get_var(&info->var, info);
2440 atafb_get_fix(&info->fix, info);
2442 info->screen_base = (void *)info->fix.smem_start;
2445 static int atafb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
2446 u_int transp, struct fb_info *info)
2452 return info->fbops->fb_setcolreg(regno, red, green, blue, transp, info);
2456 atafb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
2458 int xoffset = var->xoffset;
2459 int yoffset = var->yoffset;
2462 if (var->vmode & FB_VMODE_YWRAP) {
2463 if (yoffset < 0 || yoffset >= info->var.yres_virtual || xoffset)
2466 if (xoffset + info->var.xres > info->var.xres_virtual ||
2467 yoffset + info->var.yres > info->var.yres_virtual)
2471 if (fbhw->pan_display) {
2472 err = fbhw->pan_display(var, info);
2478 info->var.xoffset = xoffset;
2479 info->var.yoffset = yoffset;
2481 if (var->vmode & FB_VMODE_YWRAP)
2482 info->var.vmode |= FB_VMODE_YWRAP;
2484 info->var.vmode &= ~FB_VMODE_YWRAP;
2490 * generic drawing routines; imageblit needs updating for image depth > 1
2493 #if BITS_PER_LONG == 32
2494 #define BYTES_PER_LONG 4
2495 #define SHIFT_PER_LONG 5
2496 #elif BITS_PER_LONG == 64
2497 #define BYTES_PER_LONG 8
2498 #define SHIFT_PER_LONG 6
2500 #define Please update me
2504 static void atafb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
2506 struct atafb_par *par = (struct atafb_par *)info->par;
2510 if (!rect->width || !rect->height)
2514 if (info->var.bits_per_pixel == 16) {
2515 cfb_fillrect(info, rect);
2521 * We could use hardware clipping but on many cards you get around
2522 * hardware clipping by writing to framebuffer directly.
2524 x2 = rect->dx + rect->width;
2525 y2 = rect->dy + rect->height;
2526 x2 = x2 < info->var.xres_virtual ? x2 : info->var.xres_virtual;
2527 y2 = y2 < info->var.yres_virtual ? y2 : info->var.yres_virtual;
2528 width = x2 - rect->dx;
2529 height = y2 - rect->dy;
2531 if (info->var.bits_per_pixel == 1)
2532 atafb_mfb_fillrect(info, par->next_line, rect->color,
2533 rect->dy, rect->dx, height, width);
2534 else if (info->var.bits_per_pixel == 2)
2535 atafb_iplan2p2_fillrect(info, par->next_line, rect->color,
2536 rect->dy, rect->dx, height, width);
2537 else if (info->var.bits_per_pixel == 4)
2538 atafb_iplan2p4_fillrect(info, par->next_line, rect->color,
2539 rect->dy, rect->dx, height, width);
2541 atafb_iplan2p8_fillrect(info, par->next_line, rect->color,
2542 rect->dy, rect->dx, height, width);
2547 static void atafb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
2549 struct atafb_par *par = (struct atafb_par *)info->par;
2551 u32 dx, dy, sx, sy, width, height;
2555 if (info->var.bits_per_pixel == 16) {
2556 cfb_copyarea(info, area);
2561 /* clip the destination */
2562 x2 = area->dx + area->width;
2563 y2 = area->dy + area->height;
2564 dx = area->dx > 0 ? area->dx : 0;
2565 dy = area->dy > 0 ? area->dy : 0;
2566 x2 = x2 < info->var.xres_virtual ? x2 : info->var.xres_virtual;
2567 y2 = y2 < info->var.yres_virtual ? y2 : info->var.yres_virtual;
2571 if (area->sx + dx < area->dx || area->sy + dy < area->dy)
2575 sx = area->sx + (dx - area->dx);
2576 sy = area->sy + (dy - area->dy);
2578 /* the source must be completely inside the virtual screen */
2579 if (sx + width > info->var.xres_virtual ||
2580 sy + height > info->var.yres_virtual)
2583 if (dy > sy || (dy == sy && dx > sx)) {
2589 if (info->var.bits_per_pixel == 1)
2590 atafb_mfb_copyarea(info, par->next_line, sy, sx, dy, dx, height, width);
2591 else if (info->var.bits_per_pixel == 2)
2592 atafb_iplan2p2_copyarea(info, par->next_line, sy, sx, dy, dx, height, width);
2593 else if (info->var.bits_per_pixel == 4)
2594 atafb_iplan2p4_copyarea(info, par->next_line, sy, sx, dy, dx, height, width);
2596 atafb_iplan2p8_copyarea(info, par->next_line, sy, sx, dy, dx, height, width);
2601 static void atafb_imageblit(struct fb_info *info, const struct fb_image *image)
2603 struct atafb_par *par = (struct atafb_par *)info->par;
2608 u32 dx, dy, width, height, pitch;
2611 if (info->var.bits_per_pixel == 16) {
2612 cfb_imageblit(info, image);
2618 * We could use hardware clipping but on many cards you get around
2619 * hardware clipping by writing to framebuffer directly like we are
2622 x2 = image->dx + image->width;
2623 y2 = image->dy + image->height;
2626 x2 = x2 < info->var.xres_virtual ? x2 : info->var.xres_virtual;
2627 y2 = y2 < info->var.yres_virtual ? y2 : info->var.yres_virtual;
2631 if (image->depth == 1) {
2632 // used for font data
2633 dst = (unsigned long *)
2634 ((unsigned long)info->screen_base & ~(BYTES_PER_LONG - 1));
2635 dst_idx = ((unsigned long)info->screen_base & (BYTES_PER_LONG - 1)) * 8;
2636 dst_idx += dy * par->next_line * 8 + dx;
2638 pitch = (image->width + 7) / 8;
2641 if (info->var.bits_per_pixel == 1)
2642 atafb_mfb_linefill(info, par->next_line,
2644 image->bg_color, image->fg_color);
2645 else if (info->var.bits_per_pixel == 2)
2646 atafb_iplan2p2_linefill(info, par->next_line,
2648 image->bg_color, image->fg_color);
2649 else if (info->var.bits_per_pixel == 4)
2650 atafb_iplan2p4_linefill(info, par->next_line,
2652 image->bg_color, image->fg_color);
2654 atafb_iplan2p8_linefill(info, par->next_line,
2656 image->bg_color, image->fg_color);
2661 c2p_iplan2(info->screen_base, image->data, dx, dy, width,
2662 height, par->next_line, image->width,
2663 info->var.bits_per_pixel);
2668 atafb_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
2671 #ifdef FBCMD_GET_CURRENTPAR
2672 case FBCMD_GET_CURRENTPAR:
2673 if (copy_to_user((void *)arg, (void *)¤t_par,
2674 sizeof(struct atafb_par)))
2678 #ifdef FBCMD_SET_CURRENTPAR
2679 case FBCMD_SET_CURRENTPAR:
2680 if (copy_from_user((void *)¤t_par, (void *)arg,
2681 sizeof(struct atafb_par)))
2683 ata_set_par(¤t_par);
2690 /* (un)blank/poweroff
2697 static int atafb_blank(int blank, struct fb_info *info)
2699 unsigned short black[16];
2700 struct fb_cmap cmap;
2701 if (fbhw->blank && !fbhw->blank(blank))
2704 memset(black, 0, 16 * sizeof(unsigned short));
2711 fb_set_cmap(&cmap, info);
2715 do_install_cmap(info);
2721 * New fbcon interface ...
2724 /* check var by decoding var into hw par, rounding if necessary,
2725 * then encoding hw par back into new, validated var */
2726 static int atafb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
2729 struct atafb_par par;
2731 /* Validate wanted screen parameters */
2732 // if ((err = ata_decode_var(var, &par)))
2733 err = fbhw->decode_var(var, &par);
2737 /* Encode (possibly rounded) screen parameters */
2738 fbhw->encode_var(var, &par);
2742 /* actually set hw par by decoding var, then setting hardware from
2743 * hw par just decoded */
2744 static int atafb_set_par(struct fb_info *info)
2746 struct atafb_par *par = (struct atafb_par *)info->par;
2748 /* Decode wanted screen parameters */
2749 fbhw->decode_var(&info->var, par);
2750 mutex_lock(&info->mm_lock);
2751 fbhw->encode_fix(&info->fix, par);
2752 mutex_unlock(&info->mm_lock);
2754 /* Set new videomode */
2761 static struct fb_ops atafb_ops = {
2762 .owner = THIS_MODULE,
2763 .fb_check_var = atafb_check_var,
2764 .fb_set_par = atafb_set_par,
2765 .fb_setcolreg = atafb_setcolreg,
2766 .fb_blank = atafb_blank,
2767 .fb_pan_display = atafb_pan_display,
2768 .fb_fillrect = atafb_fillrect,
2769 .fb_copyarea = atafb_copyarea,
2770 .fb_imageblit = atafb_imageblit,
2771 .fb_ioctl = atafb_ioctl,
2774 static void check_default_par(int detected_mode)
2776 char default_name[10];
2778 struct fb_var_screeninfo var;
2779 unsigned long min_mem;
2781 /* First try the user supplied mode */
2783 var = atafb_predefined[default_par - 1];
2784 var.activate = FB_ACTIVATE_TEST;
2785 if (do_fb_set_var(&var, 1))
2786 default_par = 0; /* failed */
2788 /* Next is the autodetected one */
2790 var = atafb_predefined[detected_mode - 1]; /* autodetect */
2791 var.activate = FB_ACTIVATE_TEST;
2792 if (!do_fb_set_var(&var, 1))
2793 default_par = detected_mode;
2795 /* If that also failed, try some default modes... */
2797 /* try default1, default2... */
2798 for (i = 1; i < 10; i++) {
2799 sprintf(default_name,"default%d", i);
2800 default_par = get_video_mode(default_name);
2802 panic("can't set default video mode");
2803 var = atafb_predefined[default_par - 1];
2804 var.activate = FB_ACTIVATE_TEST;
2805 if (!do_fb_set_var(&var,1))
2809 min_mem = var.xres_virtual * var.yres_virtual * var.bits_per_pixel / 8;
2810 if (default_mem_req < min_mem)
2811 default_mem_req = min_mem;
2815 static void __init atafb_setup_ext(char *spec)
2817 int xres, xres_virtual, yres, depth, planes;
2818 unsigned long addr, len;
2821 /* Format is: <xres>;<yres>;<depth>;<plane organ.>;
2823 * [;<screen mem length>[;<vgaiobase>[;<bits-per-col>[;<colorreg-type>
2824 * [;<xres-virtual>]]]]]
2827 * <xres_virtual>: hardware's x-resolution (f.e. ProMST)
2829 * Even xres_virtual is available, we neither support panning nor hw-scrolling!
2831 p = strsep(&spec, ";");
2834 xres_virtual = xres = simple_strtoul(p, NULL, 10);
2838 p = strsep(&spec, ";");
2841 yres = simple_strtoul(p, NULL, 10);
2845 p = strsep(&spec, ";");
2848 depth = simple_strtoul(p, NULL, 10);
2849 if (depth != 1 && depth != 2 && depth != 4 && depth != 8 &&
2850 depth != 16 && depth != 24)
2853 p = strsep(&spec, ";");
2857 planes = FB_TYPE_INTERLEAVED_PLANES;
2859 planes = FB_TYPE_PACKED_PIXELS;
2861 planes = FB_TYPE_PLANES;
2863 planes = -1; /* true color */
2867 p = strsep(&spec, ";");
2870 addr = simple_strtoul(p, NULL, 0);
2872 p = strsep(&spec, ";");
2874 len = xres * yres * depth / 8;
2876 len = simple_strtoul(p, NULL, 0);
2878 p = strsep(&spec, ";");
2880 external_vgaiobase = simple_strtoul(p, NULL, 0);
2882 p = strsep(&spec, ";");
2884 external_bitspercol = simple_strtoul(p, NULL, 0);
2885 if (external_bitspercol > 8)
2886 external_bitspercol = 8;
2887 else if (external_bitspercol < 1)
2888 external_bitspercol = 1;
2891 p = strsep(&spec, ";");
2893 if (!strcmp(p, "vga"))
2894 external_card_type = IS_VGA;
2895 if (!strcmp(p, "mv300"))
2896 external_card_type = IS_MV300;
2899 p = strsep(&spec, ";");
2901 xres_virtual = simple_strtoul(p, NULL, 10);
2902 if (xres_virtual < xres)
2903 xres_virtual = xres;
2904 if (xres_virtual * yres * depth / 8 > len)
2905 len = xres_virtual * yres * depth / 8;
2908 external_xres = xres;
2909 external_xres_virtual = xres_virtual;
2910 external_yres = yres;
2911 external_depth = depth;
2912 external_pmode = planes;
2913 external_addr = (void *)addr;
2916 if (external_card_type == IS_MV300) {
2917 switch (external_depth) {
2919 MV300_reg = MV300_reg_1bit;
2922 MV300_reg = MV300_reg_4bit;
2925 MV300_reg = MV300_reg_8bit;
2930 #endif /* ATAFB_EXT */
2932 static void __init atafb_setup_int(char *spec)
2934 /* Format to config extended internal video hardware like OverScan:
2935 * "internal:<xres>;<yres>;<xres_max>;<yres_max>;<offset>"
2937 * <xres>: x-resolution
2938 * <yres>: y-resolution
2939 * The following are only needed if you have an overscan which
2940 * needs a black border:
2941 * <xres_max>: max. length of a line in pixels your OverScan hardware would allow
2942 * <yres_max>: max. number of lines your OverScan hardware would allow
2943 * <offset>: Offset from physical beginning to visible beginning
2944 * of screen in bytes
2949 if (!(p = strsep(&spec, ";")) || !*p)
2951 xres = simple_strtoul(p, NULL, 10);
2952 if (!(p = strsep(&spec, ";")) || !*p)
2955 tt_yres = st_yres = simple_strtoul(p, NULL, 10);
2956 if ((p = strsep(&spec, ";")) && *p)
2957 sttt_xres_virtual = simple_strtoul(p, NULL, 10);
2958 if ((p = strsep(&spec, ";")) && *p)
2959 sttt_yres_virtual = simple_strtoul(p, NULL, 0);
2960 if ((p = strsep(&spec, ";")) && *p)
2961 ovsc_offset = simple_strtoul(p, NULL, 0);
2963 if (ovsc_offset || (sttt_yres_virtual != st_yres))
2968 static void __init atafb_setup_mcap(char *spec)
2971 int vmin, vmax, hmin, hmax;
2973 /* Format for monitor capabilities is: <Vmin>;<Vmax>;<Hmin>;<Hmax>
2974 * <V*> vertical freq. in Hz
2975 * <H*> horizontal freq. in kHz
2977 if (!(p = strsep(&spec, ";")) || !*p)
2979 vmin = simple_strtoul(p, NULL, 10);
2982 if (!(p = strsep(&spec, ";")) || !*p)
2984 vmax = simple_strtoul(p, NULL, 10);
2985 if (vmax <= 0 || vmax <= vmin)
2987 if (!(p = strsep(&spec, ";")) || !*p)
2989 hmin = 1000 * simple_strtoul(p, NULL, 10);
2992 if (!(p = strsep(&spec, "")) || !*p)
2994 hmax = 1000 * simple_strtoul(p, NULL, 10);
2995 if (hmax <= 0 || hmax <= hmin)
2998 fb_info.monspecs.vfmin = vmin;
2999 fb_info.monspecs.vfmax = vmax;
3000 fb_info.monspecs.hfmin = hmin;
3001 fb_info.monspecs.hfmax = hmax;
3003 #endif /* ATAFB_FALCON */
3005 static void __init atafb_setup_user(char *spec)
3007 /* Format of user defined video mode is: <xres>;<yres>;<depth>
3010 int xres, yres, depth, temp;
3012 p = strsep(&spec, ";");
3015 xres = simple_strtoul(p, NULL, 10);
3016 p = strsep(&spec, ";");
3019 yres = simple_strtoul(p, NULL, 10);
3020 p = strsep(&spec, "");
3023 depth = simple_strtoul(p, NULL, 10);
3024 temp = get_video_mode("user0");
3027 atafb_predefined[default_par - 1].xres = xres;
3028 atafb_predefined[default_par - 1].yres = yres;
3029 atafb_predefined[default_par - 1].bits_per_pixel = depth;
3033 int __init atafb_setup(char *options)
3038 if (!options || !*options)
3041 while ((this_opt = strsep(&options, ",")) != NULL) {
3044 if ((temp = get_video_mode(this_opt))) {
3046 mode_option = this_opt;
3047 } else if (!strcmp(this_opt, "inverse"))
3049 else if (!strncmp(this_opt, "hwscroll_", 9)) {
3050 hwscroll = simple_strtoul(this_opt + 9, NULL, 10);
3057 else if (!strcmp(this_opt, "mv300")) {
3058 external_bitspercol = 8;
3059 external_card_type = IS_MV300;
3060 } else if (!strncmp(this_opt, "external:", 9))
3061 atafb_setup_ext(this_opt + 9);
3063 else if (!strncmp(this_opt, "internal:", 9))
3064 atafb_setup_int(this_opt + 9);
3066 else if (!strncmp(this_opt, "eclock:", 7)) {
3067 fext.f = simple_strtoul(this_opt + 7, NULL, 10);
3068 /* external pixelclock in kHz --> ps */
3069 fext.t = 1000000000 / fext.f;
3071 } else if (!strncmp(this_opt, "monitorcap:", 11))
3072 atafb_setup_mcap(this_opt + 11);
3074 else if (!strcmp(this_opt, "keep"))
3076 else if (!strncmp(this_opt, "R", 1))
3077 atafb_setup_user(this_opt + 1);
3082 int __init atafb_init(void)
3084 int pad, detected_mode, error;
3085 unsigned int defmode = 0;
3086 unsigned long mem_req;
3089 char *option = NULL;
3091 if (fb_get_options("atafb", &option))
3093 atafb_setup(option);
3095 printk("atafb_init: start\n");
3102 if (external_addr) {
3103 printk("atafb_init: initializing external hw\n");
3105 atafb_ops.fb_setcolreg = &ext_setcolreg;
3106 defmode = DEFMODE_EXT;
3111 if (ATARIHW_PRESENT(TT_SHIFTER)) {
3112 printk("atafb_init: initializing TT hw\n");
3114 atafb_ops.fb_setcolreg = &tt_setcolreg;
3115 defmode = DEFMODE_TT;
3120 if (ATARIHW_PRESENT(VIDEL_SHIFTER)) {
3121 printk("atafb_init: initializing Falcon hw\n");
3122 fbhw = &falcon_switch;
3123 atafb_ops.fb_setcolreg = &falcon_setcolreg;
3124 error = request_irq(IRQ_AUTO_4, falcon_vbl_switcher,
3126 "framebuffer/modeswitch",
3127 falcon_vbl_switcher);
3130 defmode = DEFMODE_F30;
3135 if (ATARIHW_PRESENT(STND_SHIFTER) ||
3136 ATARIHW_PRESENT(EXTD_SHIFTER)) {
3137 printk("atafb_init: initializing ST/E hw\n");
3139 atafb_ops.fb_setcolreg = &stste_setcolreg;
3140 defmode = DEFMODE_STE;
3144 atafb_ops.fb_setcolreg = &stste_setcolreg;
3145 printk("Cannot determine video hardware; defaulting to ST(e)\n");
3146 #else /* ATAFB_STE */
3147 /* no default driver included */
3148 /* Nobody will ever see this message :-) */
3149 panic("Cannot initialize video hardware");
3153 /* Multisync monitor capabilities */
3154 /* Atari-TOS defaults if no boot option present */
3155 if (fb_info.monspecs.hfmin == 0) {
3156 fb_info.monspecs.hfmin = 31000;
3157 fb_info.monspecs.hfmax = 32000;
3158 fb_info.monspecs.vfmin = 58;
3159 fb_info.monspecs.vfmax = 62;
3162 detected_mode = fbhw->detect();
3163 check_default_par(detected_mode);
3165 if (!external_addr) {
3166 #endif /* ATAFB_EXT */
3167 mem_req = default_mem_req + ovsc_offset + ovsc_addlen;
3168 mem_req = PAGE_ALIGN(mem_req) + PAGE_SIZE;
3169 screen_base = atari_stram_alloc(mem_req, "atafb");
3171 panic("Cannot allocate screen memory");
3172 memset(screen_base, 0, mem_req);
3173 pad = -(unsigned long)screen_base & (PAGE_SIZE - 1);
3175 real_screen_base = screen_base + ovsc_offset;
3176 screen_len = (mem_req - pad - ovsc_offset) & PAGE_MASK;
3178 if (CPU_IS_040_OR_060) {
3179 /* On a '040+, the cache mode of video RAM must be set to
3180 * write-through also for internal video hardware! */
3181 cache_push(virt_to_phys(screen_base), screen_len);
3182 kernel_set_cachemode(screen_base, screen_len,
3183 IOMAP_WRITETHROUGH);
3185 printk("atafb: screen_base %p real_screen_base %p screen_len %d\n",
3186 screen_base, real_screen_base, screen_len);
3189 /* Map the video memory (physical address given) to somewhere
3190 * in the kernel address space.
3192 external_addr = ioremap_writethrough((unsigned long)external_addr,
3194 if (external_vgaiobase)
3195 external_vgaiobase =
3196 (unsigned long)ioremap(external_vgaiobase, 0x10000);
3198 real_screen_base = external_addr;
3199 screen_len = external_len & PAGE_MASK;
3200 memset (screen_base, 0, external_len);
3202 #endif /* ATAFB_EXT */
3204 // strcpy(fb_info.mode->name, "Atari Builtin ");
3205 fb_info.fbops = &atafb_ops;
3206 // try to set default (detected; requested) var
3207 do_fb_set_var(&atafb_predefined[default_par - 1], 1);
3208 // reads hw state into current par, which may not be sane yet
3209 ata_get_par(¤t_par);
3210 fb_info.par = ¤t_par;
3211 // tries to read from HW which may not be initialized yet
3212 // so set sane var first, then call atafb_set_par
3213 atafb_get_var(&fb_info.var, &fb_info);
3216 fb_info.pseudo_palette = current_par.hw.falcon.pseudo_palette;
3218 fb_info.flags = FBINFO_FLAG_DEFAULT;
3220 if (!fb_find_mode(&fb_info.var, &fb_info, mode_option, atafb_modedb,
3221 NUM_TOTAL_MODES, &atafb_modedb[defmode],
3222 fb_info.var.bits_per_pixel)) {
3226 fb_videomode_to_modelist(atafb_modedb, NUM_TOTAL_MODES,
3229 atafb_set_disp(&fb_info);
3231 fb_alloc_cmap(&(fb_info.cmap), 1 << fb_info.var.bits_per_pixel, 0);
3234 printk("Determined %dx%d, depth %d\n",
3235 fb_info.var.xres, fb_info.var.yres, fb_info.var.bits_per_pixel);
3236 if ((fb_info.var.xres != fb_info.var.xres_virtual) ||
3237 (fb_info.var.yres != fb_info.var.yres_virtual))
3238 printk(" virtual %dx%d\n", fb_info.var.xres_virtual,
3239 fb_info.var.yres_virtual);
3241 if (register_framebuffer(&fb_info) < 0) {
3243 if (external_addr) {
3244 iounmap(external_addr);
3245 external_addr = NULL;
3247 if (external_vgaiobase) {
3248 iounmap((void*)external_vgaiobase);
3249 external_vgaiobase = 0;
3255 // FIXME: mode needs setting!
3256 //printk("fb%d: %s frame buffer device, using %dK of video memory\n",
3257 // fb_info.node, fb_info.mode->name, screen_len>>10);
3258 printk("fb%d: frame buffer device, using %dK of video memory\n",
3259 fb_info.node, screen_len >> 10);
3261 /* TODO: This driver cannot be unloaded yet */
3265 module_init(atafb_init);
3268 MODULE_LICENSE("GPL");
3270 int cleanup_module(void)
3272 unregister_framebuffer(&fb_info);
3273 return atafb_deinit();