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 {
126 #if defined ATAFB_TT || defined ATAFB_STE
135 /* Here are fields for storing a video mode, as direct
136 * parameters for the hardware.
146 short hht, hbb, hbe, hdb, hde, hss;
147 short vft, vbb, vbe, vdb, vde, vss;
148 /* auxiliary information */
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);
333 * * save current hardware state *
334 * void (*fb_save_state)(struct fb_info *info);
336 * * restore saved state *
337 * void (*fb_restore_state)(struct fb_info *info);
342 /* ++roman: This structure abstracts from the underlying hardware (ST(e),
345 * int (*detect)(void)
346 * This function should detect the current video mode settings and
347 * store them in atafb_predefined[0] for later reference by the
348 * user. Return the index+1 of an equivalent predefined mode or 0
349 * if there is no such.
351 * int (*encode_fix)(struct fb_fix_screeninfo *fix,
352 * struct atafb_par *par)
353 * This function should fill in the 'fix' structure based on the
354 * values in the 'par' structure.
355 * !!! Obsolete, perhaps !!!
357 * int (*decode_var)(struct fb_var_screeninfo *var,
358 * struct atafb_par *par)
359 * Get the video params out of 'var'. If a value doesn't fit, round
360 * it up, if it's too big, return EINVAL.
361 * Round up in the following order: bits_per_pixel, xres, yres,
362 * xres_virtual, yres_virtual, xoffset, yoffset, grayscale, bitfields,
363 * horizontal timing, vertical timing.
365 * int (*encode_var)(struct fb_var_screeninfo *var,
366 * struct atafb_par *par);
367 * Fill the 'var' structure based on the values in 'par' and maybe
368 * other values read out of the hardware.
370 * void (*get_par)(struct atafb_par *par)
371 * Fill the hardware's 'par' structure.
372 * !!! Used only by detect() !!!
374 * void (*set_par)(struct atafb_par *par)
375 * Set the hardware according to 'par'.
377 * void (*set_screen_base)(void *s_base)
378 * Set the base address of the displayed frame buffer. Only called
379 * if yres_virtual > yres or xres_virtual > xres.
381 * int (*blank)(int blank_mode)
382 * Blank the screen if blank_mode != 0, else unblank. If blank == NULL then
383 * the caller blanks by setting the CLUT to all black. Return 0 if blanking
384 * succeeded, !=0 if un-/blanking failed due to e.g. a video mode which
385 * doesn't support it. Implements VESA suspend and powerdown modes on
386 * hardware that supports disabling hsync/vsync:
387 * blank_mode == 2: suspend vsync, 3:suspend hsync, 4: powerdown.
390 static struct fb_hwswitch {
392 int (*encode_fix)(struct fb_fix_screeninfo *fix,
393 struct atafb_par *par);
394 int (*decode_var)(struct fb_var_screeninfo *var,
395 struct atafb_par *par);
396 int (*encode_var)(struct fb_var_screeninfo *var,
397 struct atafb_par *par);
398 void (*get_par)(struct atafb_par *par);
399 void (*set_par)(struct atafb_par *par);
400 void (*set_screen_base)(void *s_base);
401 int (*blank)(int blank_mode);
402 int (*pan_display)(struct fb_var_screeninfo *var,
403 struct fb_info *info);
406 static char *autodetect_names[] = { "autodetect", NULL };
407 static char *stlow_names[] = { "stlow", NULL };
408 static char *stmid_names[] = { "stmid", "default5", NULL };
409 static char *sthigh_names[] = { "sthigh", "default4", NULL };
410 static char *ttlow_names[] = { "ttlow", NULL };
411 static char *ttmid_names[] = { "ttmid", "default1", NULL };
412 static char *tthigh_names[] = { "tthigh", "default2", NULL };
413 static char *vga2_names[] = { "vga2", NULL };
414 static char *vga4_names[] = { "vga4", NULL };
415 static char *vga16_names[] = { "vga16", "default3", NULL };
416 static char *vga256_names[] = { "vga256", NULL };
417 static char *falh2_names[] = { "falh2", NULL };
418 static char *falh16_names[] = { "falh16", NULL };
420 static char **fb_var_names[] = {
437 static struct fb_var_screeninfo atafb_predefined[] = {
439 * yres_virtual == 0 means use hw-scrolling if possible, else yres
442 0, 0, 0, 0, 0, 0, 0, 0, /* xres-grayscale */
443 {0, 0, 0}, {0, 0, 0}, {0, 0, 0}, {0, 0, 0}, /* red green blue tran*/
444 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
446 320, 200, 320, 0, 0, 0, 4, 0,
447 {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
448 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
450 640, 200, 640, 0, 0, 0, 2, 0,
451 {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
452 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
454 640, 400, 640, 0, 0, 0, 1, 0,
455 {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
456 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
458 320, 480, 320, 0, 0, 0, 8, 0,
459 {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
460 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
462 640, 480, 640, 0, 0, 0, 4, 0,
463 {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
464 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
466 1280, 960, 1280, 0, 0, 0, 1, 0,
467 {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
468 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
470 640, 480, 640, 0, 0, 0, 1, 0,
471 {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
472 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
474 640, 480, 640, 0, 0, 0, 2, 0,
475 {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
476 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
478 640, 480, 640, 0, 0, 0, 4, 0,
479 {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
480 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
482 640, 480, 640, 0, 0, 0, 8, 0,
483 {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
484 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
486 896, 608, 896, 0, 0, 0, 1, 0,
487 {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
488 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
490 896, 608, 896, 0, 0, 0, 4, 0,
491 {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
492 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
495 static int num_atafb_predefined = ARRAY_SIZE(atafb_predefined);
497 static struct fb_videomode atafb_modedb[] __initdata = {
501 * If you change these, make sure to update DEFMODE_* as well!
509 /* 320x200, 15 kHz, 60 Hz (ST low) */
510 "st-low", 60, 320, 200, 32000, 32, 16, 31, 14, 96, 4,
511 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
513 /* 640x200, 15 kHz, 60 Hz (ST medium) */
514 "st-mid", 60, 640, 200, 32000, 32, 16, 31, 14, 96, 4,
515 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
517 /* 640x400, 30.25 kHz, 63.5 Hz (ST high) */
518 "st-high", 63, 640, 400, 32000, 128, 0, 40, 14, 128, 4,
519 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
521 /* 320x480, 15 kHz, 60 Hz (TT low) */
522 "tt-low", 60, 320, 480, 31041, 120, 100, 8, 16, 140, 30,
523 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
525 /* 640x480, 29 kHz, 57 Hz (TT medium) */
526 "tt-mid", 60, 640, 480, 31041, 120, 100, 8, 16, 140, 30,
527 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
529 /* 1280x960, 29 kHz, 60 Hz (TT high) */
530 "tt-high", 57, 640, 960, 31041, 120, 100, 8, 16, 140, 30,
531 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
539 /* 640x480, 31 kHz, 60 Hz (VGA) */
540 "vga", 63.5, 640, 480, 32000, 18, 42, 31, 11, 96, 3,
541 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
543 /* 640x400, 31 kHz, 70 Hz (VGA) */
544 "vga70", 70, 640, 400, 32000, 18, 42, 31, 11, 96, 3,
545 FB_SYNC_VERT_HIGH_ACT | FB_SYNC_COMP_HIGH_ACT, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
549 * Falcon HiRes Video Modes
553 /* 896x608, 31 kHz, 60 Hz (Falcon High) */
554 "falh", 60, 896, 608, 32000, 18, 42, 31, 1, 96,3,
555 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
559 #define NUM_TOTAL_MODES ARRAY_SIZE(atafb_modedb)
561 static char *mode_option __initdata = NULL;
565 #define DEFMODE_TT 5 /* "tt-high" for TT */
566 #define DEFMODE_F30 7 /* "vga70" for Falcon */
567 #define DEFMODE_STE 2 /* "st-high" for ST/E */
568 #define DEFMODE_EXT 6 /* "vga" for external */
571 static int get_video_mode(char *vname)
577 name_list = fb_var_names;
578 for (i = 0; i < num_atafb_predefined; i++) {
583 if (!strcmp(vname, *name))
593 /* ------------------- TT specific functions ---------------------- */
597 static int tt_encode_fix(struct fb_fix_screeninfo *fix, struct atafb_par *par)
601 strcpy(fix->id, "Atari Builtin");
602 fix->smem_start = (unsigned long)real_screen_base;
603 fix->smem_len = screen_len;
604 fix->type = FB_TYPE_INTERLEAVED_PLANES;
606 fix->visual = FB_VISUAL_PSEUDOCOLOR;
607 mode = par->hw.tt.mode & TT_SHIFTER_MODEMASK;
608 if (mode == TT_SHIFTER_TTHIGH || mode == TT_SHIFTER_STHIGH) {
609 fix->type = FB_TYPE_PACKED_PIXELS;
611 if (mode == TT_SHIFTER_TTHIGH)
612 fix->visual = FB_VISUAL_MONO01;
617 fix->line_length = 0;
618 fix->accel = FB_ACCEL_ATARIBLITT;
622 static int tt_decode_var(struct fb_var_screeninfo *var, struct atafb_par *par)
624 int xres = var->xres;
625 int yres = var->yres;
626 int bpp = var->bits_per_pixel;
628 int yres_virtual = var->yres_virtual;
631 if (bpp > 1 || xres > sttt_xres * 2 || yres > tt_yres * 2)
633 par->hw.tt.mode = TT_SHIFTER_TTHIGH;
634 xres = sttt_xres * 2;
638 if (bpp > 8 || xres > sttt_xres || yres > tt_yres)
641 if (xres > sttt_xres / 2 || yres > tt_yres)
643 par->hw.tt.mode = TT_SHIFTER_TTLOW;
644 xres = sttt_xres / 2;
647 } else if (bpp > 2) {
648 if (xres > sttt_xres || yres > tt_yres)
650 if (xres > sttt_xres / 2 || yres > st_yres / 2) {
651 par->hw.tt.mode = TT_SHIFTER_TTMID;
656 par->hw.tt.mode = TT_SHIFTER_STLOW;
657 xres = sttt_xres / 2;
661 } else if (bpp > 1) {
662 if (xres > sttt_xres || yres > st_yres / 2)
664 par->hw.tt.mode = TT_SHIFTER_STMID;
668 } else if (var->xres > sttt_xres || var->yres > st_yres) {
671 par->hw.tt.mode = TT_SHIFTER_STHIGH;
677 if (yres_virtual <= 0)
679 else if (yres_virtual < yres)
681 if (var->sync & FB_SYNC_EXT)
685 linelen = xres * bpp / 8;
686 if (yres_virtual * linelen > screen_len && screen_len)
688 if (yres * linelen > screen_len && screen_len)
690 if (var->yoffset + yres > yres_virtual && yres_virtual)
692 par->yres_virtual = yres_virtual;
693 par->screen_base = screen_base + var->yoffset * linelen;
697 static int tt_encode_var(struct fb_var_screeninfo *var, struct atafb_par *par)
700 memset(var, 0, sizeof(struct fb_var_screeninfo));
703 var->red.msb_right = 0;
706 var->pixclock = 31041;
707 var->left_margin = 120; /* these may be incorrect */
708 var->right_margin = 100;
709 var->upper_margin = 8;
710 var->lower_margin = 16;
711 var->hsync_len = 140;
717 if (par->hw.tt.sync & 1)
720 var->sync = FB_SYNC_EXT;
722 switch (par->hw.tt.mode & TT_SHIFTER_MODEMASK) {
723 case TT_SHIFTER_STLOW:
724 var->xres = sttt_xres / 2;
725 var->xres_virtual = sttt_xres_virtual / 2;
726 var->yres = st_yres / 2;
727 var->bits_per_pixel = 4;
729 case TT_SHIFTER_STMID:
730 var->xres = sttt_xres;
731 var->xres_virtual = sttt_xres_virtual;
732 var->yres = st_yres / 2;
733 var->bits_per_pixel = 2;
735 case TT_SHIFTER_STHIGH:
736 var->xres = sttt_xres;
737 var->xres_virtual = sttt_xres_virtual;
739 var->bits_per_pixel = 1;
741 case TT_SHIFTER_TTLOW:
742 var->xres = sttt_xres / 2;
743 var->xres_virtual = sttt_xres_virtual / 2;
745 var->bits_per_pixel = 8;
747 case TT_SHIFTER_TTMID:
748 var->xres = sttt_xres;
749 var->xres_virtual = sttt_xres_virtual;
751 var->bits_per_pixel = 4;
753 case TT_SHIFTER_TTHIGH:
755 var->xres = sttt_xres * 2;
756 var->xres_virtual = sttt_xres_virtual * 2;
757 var->yres = tt_yres * 2;
758 var->bits_per_pixel = 1;
761 var->blue = var->green = var->red;
762 var->transp.offset = 0;
763 var->transp.length = 0;
764 var->transp.msb_right = 0;
765 linelen = var->xres_virtual * var->bits_per_pixel / 8;
767 var->yres_virtual = var->yres;
768 else if (screen_len) {
769 if (par->yres_virtual)
770 var->yres_virtual = par->yres_virtual;
772 /* yres_virtual == 0 means use maximum */
773 var->yres_virtual = screen_len / linelen;
776 var->yres_virtual = 2 * var->yres;
778 var->yres_virtual = var->yres + hwscroll * 16;
782 var->yoffset = (par->screen_base - screen_base) / linelen;
787 var->vmode = FB_VMODE_NONINTERLACED;
791 static void tt_get_par(struct atafb_par *par)
794 par->hw.tt.mode = shifter_tt.tt_shiftmode;
795 par->hw.tt.sync = shifter.syncmode;
796 addr = ((shifter.bas_hi & 0xff) << 16) |
797 ((shifter.bas_md & 0xff) << 8) |
798 ((shifter.bas_lo & 0xff));
799 par->screen_base = phys_to_virt(addr);
802 static void tt_set_par(struct atafb_par *par)
804 shifter_tt.tt_shiftmode = par->hw.tt.mode;
805 shifter.syncmode = par->hw.tt.sync;
806 /* only set screen_base if really necessary */
807 if (current_par.screen_base != par->screen_base)
808 fbhw->set_screen_base(par->screen_base);
811 static int tt_setcolreg(unsigned int regno, unsigned int red,
812 unsigned int green, unsigned int blue,
813 unsigned int transp, struct fb_info *info)
815 if ((shifter_tt.tt_shiftmode & TT_SHIFTER_MODEMASK) == TT_SHIFTER_STHIGH)
819 tt_palette[regno] = (((red >> 12) << 8) | ((green >> 12) << 4) |
821 if ((shifter_tt.tt_shiftmode & TT_SHIFTER_MODEMASK) ==
822 TT_SHIFTER_STHIGH && regno == 254)
827 static int tt_detect(void)
829 struct atafb_par par;
831 /* Determine the connected monitor: The DMA sound must be
832 * disabled before reading the MFP GPIP, because the Sound
833 * Done Signal and the Monochrome Detect are XORed together!
835 * Even on a TT, we should look if there is a DMA sound. It was
836 * announced that the Eagle is TT compatible, but only the PCM is
839 if (ATARIHW_PRESENT(PCM_8BIT)) {
840 tt_dmasnd.ctrl = DMASND_CTRL_OFF;
841 udelay(20); /* wait a while for things to settle down */
843 mono_moni = (mfp.par_dt_reg & 0x80) == 0;
846 tt_encode_var(&atafb_predefined[0], &par);
851 #endif /* ATAFB_TT */
853 /* ------------------- Falcon specific functions ---------------------- */
857 static int mon_type; /* Falcon connected monitor */
858 static int f030_bus_width; /* Falcon ram bus width (for vid_control) */
864 static struct pixel_clock {
865 unsigned long f; /* f/[Hz] */
866 unsigned long t; /* t/[ps] (=1/f) */
867 int right, hsync, left; /* standard timing in clock cycles, not pixel */
868 /* hsync initialized in falcon_detect() */
869 int sync_mask; /* or-mask for hw.falcon.sync to set this clock */
870 int control_mask; /* ditto, for hw.falcon.vid_control */
872 25175000, 39721, 18, 0, 42, 0x0, VCO_CLOCK25
874 32000000, 31250, 18, 0, 42, 0x0, 0
876 0, 0, 18, 0, 42, 0x1, 0
879 /* VIDEL-prescale values [mon_type][pixel_length from VCO] */
880 static int vdl_prescale[4][3] = {
881 { 4,2,1 }, { 4,2,1 }, { 4,2,2 }, { 4,2,1 }
884 /* Default hsync timing [mon_type] in picoseconds */
885 static long h_syncs[4] = { 3000000, 4875000, 4000000, 4875000 };
887 #ifdef FBCON_HAS_CFB16
888 static u16 fbcon_cfb16_cmap[16];
891 static inline int hxx_prescale(struct falcon_hw *hw)
893 return hw->ste_mode ? 16
894 : vdl_prescale[mon_type][hw->vid_mode >> 2 & 0x3];
897 static int falcon_encode_fix(struct fb_fix_screeninfo *fix,
898 struct atafb_par *par)
900 strcpy(fix->id, "Atari Builtin");
901 fix->smem_start = (unsigned long)real_screen_base;
902 fix->smem_len = screen_len;
903 fix->type = FB_TYPE_INTERLEAVED_PLANES;
905 fix->visual = FB_VISUAL_PSEUDOCOLOR;
909 if (par->hw.falcon.mono) {
910 fix->type = FB_TYPE_PACKED_PIXELS;
912 /* no smooth scrolling with longword aligned video mem */
914 } else if (par->hw.falcon.f_shift & 0x100) {
915 fix->type = FB_TYPE_PACKED_PIXELS;
917 /* Is this ok or should it be DIRECTCOLOR? */
918 fix->visual = FB_VISUAL_TRUECOLOR;
921 fix->line_length = 0;
922 fix->accel = FB_ACCEL_ATARIBLITT;
926 static int falcon_decode_var(struct fb_var_screeninfo *var,
927 struct atafb_par *par)
929 int bpp = var->bits_per_pixel;
930 int xres = var->xres;
931 int yres = var->yres;
932 int xres_virtual = var->xres_virtual;
933 int yres_virtual = var->yres_virtual;
934 int left_margin, right_margin, hsync_len;
935 int upper_margin, lower_margin, vsync_len;
937 int interlace = 0, doubleline = 0;
938 struct pixel_clock *pclock;
939 int plen; /* width of pixel in clock cycles */
944 int hdb_off, hde_off, base_off;
945 int gstart, gend1, gend2, align;
948 Get the video params out of 'var'. If a value doesn't fit, round
949 it up, if it's too big, return EINVAL.
950 Round up in the following order: bits_per_pixel, xres, yres,
951 xres_virtual, yres_virtual, xoffset, yoffset, grayscale, bitfields,
952 horizontal timing, vertical timing.
954 There is a maximum of screen resolution determined by pixelclock
955 and minimum frame rate -- (X+hmarg.)*(Y+vmarg.)*vfmin <= pixelclock.
956 In interlace mode this is " * " *vfmin <= pixelclock.
957 Additional constraints: hfreq.
958 Frequency range for multisync monitors is given via command line.
959 For TV and SM124 both frequencies are fixed.
961 X % 16 == 0 to fit 8x?? font (except 1 bitplane modes must use X%32 == 0)
962 Y % 16 == 0 to fit 8x16 font
965 Currently interlace and doubleline mode in var are ignored.
966 On SM124 and TV only the standard resolutions can be used.
969 /* Reject uninitialized mode */
970 if (!xres || !yres || !bpp)
973 if (mon_type == F_MON_SM && bpp != 1)
978 par->hw.falcon.f_shift = 0x400;
979 par->hw.falcon.st_shift = 0x200;
980 } else if (bpp <= 2) {
982 par->hw.falcon.f_shift = 0x000;
983 par->hw.falcon.st_shift = 0x100;
984 } else if (bpp <= 4) {
986 par->hw.falcon.f_shift = 0x000;
987 par->hw.falcon.st_shift = 0x000;
988 } else if (bpp <= 8) {
990 par->hw.falcon.f_shift = 0x010;
991 } else if (bpp <= 16) {
992 bpp = 16; /* packed pixel mode */
993 par->hw.falcon.f_shift = 0x100; /* hicolor, no overlay */
996 par->hw.falcon.bpp = bpp;
998 if (mon_type == F_MON_SM || DontCalcRes) {
999 /* Skip all calculations. VGA/TV/SC1224 only supported. */
1000 struct fb_var_screeninfo *myvar = &atafb_predefined[0];
1002 if (bpp > myvar->bits_per_pixel ||
1003 var->xres > myvar->xres ||
1004 var->yres > myvar->yres)
1006 fbhw->get_par(par); /* Current par will be new par */
1007 goto set_screen_base; /* Don't forget this */
1010 /* Only some fixed resolutions < 640x400 */
1013 else if (xres <= 640 && bpp != 16)
1017 else if (yres <= 240)
1019 else if (yres <= 400)
1022 /* 2 planes must use STE compatibility mode */
1023 par->hw.falcon.ste_mode = bpp == 2;
1024 par->hw.falcon.mono = bpp == 1;
1026 /* Total and visible scanline length must be a multiple of one longword,
1027 * this and the console fontwidth yields the alignment for xres and
1029 * TODO: this way "odd" fontheights are not supported
1031 * Special case in STE mode: blank and graphic positions don't align,
1032 * avoid trash at right margin
1034 if (par->hw.falcon.ste_mode)
1035 xres = (xres + 63) & ~63;
1037 xres = (xres + 31) & ~31;
1039 xres = (xres + 15) & ~15;
1041 yres = (yres + 15) & ~15;
1043 yres = (yres + 7) & ~7;
1045 if (xres_virtual < xres)
1046 xres_virtual = xres;
1048 xres_virtual = (xres_virtual + 31) & ~31;
1050 xres_virtual = (xres_virtual + 15) & ~15;
1052 if (yres_virtual <= 0)
1054 else if (yres_virtual < yres)
1055 yres_virtual = yres;
1057 /* backward bug-compatibility */
1058 if (var->pixclock > 1)
1061 par->hw.falcon.line_width = bpp * xres / 16;
1062 par->hw.falcon.line_offset = bpp * (xres_virtual - xres) / 16;
1064 /* single or double pixel width */
1065 xstretch = (xres < 640) ? 2 : 1;
1067 #if 0 /* SM124 supports only 640x400, this is rejected above */
1068 if (mon_type == F_MON_SM) {
1069 if (xres != 640 && yres != 400)
1073 /* SM124-mode is special */
1074 par->hw.falcon.ste_mode = 1;
1075 par->hw.falcon.f_shift = 0x000;
1076 par->hw.falcon.st_shift = 0x200;
1077 left_margin = hsync_len = 128 / plen;
1079 /* TODO set all margins */
1082 if (mon_type == F_MON_SC || mon_type == F_MON_TV) {
1083 plen = 2 * xstretch;
1084 if (var->pixclock > f32.t * plen)
1089 if (var->pixclock == 0) {
1090 /* set some minimal margins which center the screen */
1093 hsync_len = pclock->hsync / plen;
1096 vsync_len = interlace ? 3 : 4;
1098 left_margin = var->left_margin;
1099 right_margin = var->right_margin;
1100 hsync_len = var->hsync_len;
1101 upper_margin = var->upper_margin;
1102 lower_margin = var->lower_margin;
1103 vsync_len = var->vsync_len;
1104 if (var->vmode & FB_VMODE_INTERLACED) {
1105 upper_margin = (upper_margin + 1) / 2;
1106 lower_margin = (lower_margin + 1) / 2;
1107 vsync_len = (vsync_len + 1) / 2;
1108 } else if (var->vmode & FB_VMODE_DOUBLE) {
1114 } else { /* F_MON_VGA */
1116 xstretch = 2; /* Double pixel width only for hicolor */
1117 /* Default values are used for vert./hor. timing if no pixelclock given. */
1118 if (var->pixclock == 0) {
1121 /* Choose master pixelclock depending on hor. timing */
1122 plen = 1 * xstretch;
1123 if ((plen * xres + f25.right + f25.hsync + f25.left) *
1124 fb_info.monspecs.hfmin < f25.f)
1126 else if ((plen * xres + f32.right + f32.hsync +
1127 f32.left) * fb_info.monspecs.hfmin < f32.f)
1129 else if ((plen * xres + fext.right + fext.hsync +
1130 fext.left) * fb_info.monspecs.hfmin < fext.f &&
1136 left_margin = pclock->left / plen;
1137 right_margin = pclock->right / plen;
1138 hsync_len = pclock->hsync / plen;
1139 linesize = left_margin + xres + right_margin + hsync_len;
1144 /* Choose largest pixelclock <= wanted clock */
1146 unsigned long pcl = ULONG_MAX;
1148 for (i = 1; i <= 4; i *= 2) {
1149 if (f25.t * i >= var->pixclock &&
1154 if (f32.t * i >= var->pixclock &&
1159 if (fext.t && fext.t * i >= var->pixclock &&
1167 plen = pcl / pclock->t;
1169 left_margin = var->left_margin;
1170 right_margin = var->right_margin;
1171 hsync_len = var->hsync_len;
1172 upper_margin = var->upper_margin;
1173 lower_margin = var->lower_margin;
1174 vsync_len = var->vsync_len;
1175 /* Internal unit is [single lines per (half-)frame] */
1176 if (var->vmode & FB_VMODE_INTERLACED) {
1177 /* # lines in half frame */
1178 /* External unit is [lines per full frame] */
1179 upper_margin = (upper_margin + 1) / 2;
1180 lower_margin = (lower_margin + 1) / 2;
1181 vsync_len = (vsync_len + 1) / 2;
1182 } else if (var->vmode & FB_VMODE_DOUBLE) {
1183 /* External unit is [double lines per frame] */
1189 if (pclock == &fext)
1190 longoffset = 1; /* VIDEL doesn't synchronize on short offset */
1192 /* Is video bus bandwidth (32MB/s) too low for this resolution? */
1193 /* this is definitely wrong if bus clock != 32MHz */
1194 if (pclock->f / plen / 8 * bpp > 32000000L)
1200 /* include sync lengths in right/lower margin for all calculations */
1201 right_margin += hsync_len;
1202 lower_margin += vsync_len;
1204 /* ! In all calculations of margins we use # of lines in half frame
1205 * (which is a full frame in non-interlace mode), so we can switch
1206 * between interlace and non-interlace without messing around
1210 /* Set base_offset 128 and video bus width */
1211 par->hw.falcon.vid_control = mon_type | f030_bus_width;
1213 par->hw.falcon.vid_control |= VCO_SHORTOFFS; /* base_offset 64 */
1214 if (var->sync & FB_SYNC_HOR_HIGH_ACT)
1215 par->hw.falcon.vid_control |= VCO_HSYPOS;
1216 if (var->sync & FB_SYNC_VERT_HIGH_ACT)
1217 par->hw.falcon.vid_control |= VCO_VSYPOS;
1219 par->hw.falcon.vid_control |= pclock->control_mask;
1220 /* External or internal clock */
1221 par->hw.falcon.sync = pclock->sync_mask | 0x2;
1222 /* Pixellength and prescale */
1223 par->hw.falcon.vid_mode = (2 / plen) << 2;
1225 par->hw.falcon.vid_mode |= VMO_DOUBLE;
1227 par->hw.falcon.vid_mode |= VMO_INTER;
1229 /*********************
1230 * Horizontal timing: unit = [master clock cycles]
1231 * unit of hxx-registers: [master clock cycles * prescale]
1232 * Hxx-registers are 9 bit wide
1234 * 1 line = ((hht + 2) * 2 * prescale) clock cycles
1236 * graphic output = hdb & 0x200 ?
1237 * ((hht + 2) * 2 - hdb + hde) * prescale - hdboff + hdeoff:
1238 * (hht + 2 - hdb + hde) * prescale - hdboff + hdeoff
1239 * (this must be a multiple of plen*128/bpp, on VGA pixels
1240 * to the right may be cut off with a bigger right margin)
1242 * start of graphics relative to start of 1st halfline = hdb & 0x200 ?
1243 * (hdb - hht - 2) * prescale + hdboff :
1244 * hdb * prescale + hdboff
1246 * end of graphics relative to start of 1st halfline =
1247 * (hde + hht + 2) * prescale + hdeoff
1248 *********************/
1249 /* Calculate VIDEL registers */
1251 prescale = hxx_prescale(&par->hw.falcon);
1252 base_off = par->hw.falcon.vid_control & VCO_SHORTOFFS ? 64 : 128;
1254 /* Offsets depend on video mode */
1255 /* Offsets are in clock cycles, divide by prescale to
1256 * calculate hd[be]-registers
1258 if (par->hw.falcon.f_shift & 0x100) {
1261 hdb_off = (base_off + 16 * plen) + prescale;
1264 hde_off = ((128 / bpp + 2) * plen);
1265 if (par->hw.falcon.ste_mode)
1266 hdb_off = (64 + base_off + (128 / bpp + 2) * plen) + prescale;
1268 hdb_off = (base_off + (128 / bpp + 18) * plen) + prescale;
1271 gstart = (prescale / 2 + plen * left_margin) / prescale;
1272 /* gend1 is for hde (gend-gstart multiple of align), shifter's xres */
1273 gend1 = gstart + roundup(xres, align) * plen / prescale;
1274 /* gend2 is for hbb, visible xres (rest to gend1 is cut off by hblank) */
1275 gend2 = gstart + xres * plen / prescale;
1276 par->HHT = plen * (left_margin + xres + right_margin) /
1278 /* par->HHT = (gend2 + plen * right_margin / prescale) / 2 - 2;*/
1280 par->HDB = gstart - hdb_off / prescale;
1283 par->HDB += par->HHT + 2 + 0x200;
1284 par->HDE = gend1 - par->HHT - 2 - hde_off / prescale;
1285 par->HBB = gend2 - par->HHT - 2;
1287 /* One more Videl constraint: data fetch of two lines must not overlap */
1288 if ((par->HDB & 0x200) && (par->HDB & ~0x200) - par->HDE <= 5) {
1289 /* if this happens increase margins, decrease hfreq. */
1292 if (hde_off % prescale)
1293 par->HBB++; /* compensate for non matching hde and hbb */
1294 par->HSS = par->HHT + 2 - plen * hsync_len / prescale;
1295 if (par->HSS < par->HBB)
1296 par->HSS = par->HBB;
1299 /* check hor. frequency */
1300 hfreq = pclock->f / ((par->HHT + 2) * prescale * 2);
1301 if (hfreq > fb_info.monspecs.hfmax && mon_type != F_MON_VGA) {
1302 /* ++guenther: ^^^^^^^^^^^^^^^^^^^ can't remember why I did this */
1303 /* Too high -> enlarge margin */
1308 if (hfreq > fb_info.monspecs.hfmax || hfreq < fb_info.monspecs.hfmin)
1312 /* All Vxx must be odd in non-interlace, since frame starts in the middle
1313 * of the first displayed line!
1314 * One frame consists of VFT+1 half lines. VFT+1 must be even in
1315 * non-interlace, odd in interlace mode for synchronisation.
1316 * Vxx-registers are 11 bit wide
1318 par->VBE = (upper_margin * 2 + 1); /* must begin on odd halfline */
1319 par->VDB = par->VBE;
1324 par->VDE <<= 1; /* VDE now half lines per (half-)frame */
1325 par->VDE += par->VDB;
1326 par->VBB = par->VDE;
1327 par->VFT = par->VBB + (lower_margin * 2 - 1) - 1;
1328 par->VSS = par->VFT + 1 - (vsync_len * 2 - 1);
1329 /* vbb,vss,vft must be even in interlace mode */
1336 /* V-frequency check, hope I didn't create any loop here. */
1337 /* Interlace and doubleline are mutually exclusive. */
1338 vfreq = (hfreq * 2) / (par->VFT + 1);
1339 if (vfreq > fb_info.monspecs.vfmax && !doubleline && !interlace) {
1340 /* Too high -> try again with doubleline */
1343 } else if (vfreq < fb_info.monspecs.vfmin && !interlace && !doubleline) {
1344 /* Too low -> try again with interlace */
1347 } else if (vfreq < fb_info.monspecs.vfmin && doubleline) {
1348 /* Doubleline too low -> clear doubleline and enlarge margins */
1352 (hfreq * 2) / (par->VFT + 1 + 4 * lines - 2 * yres) >
1353 fb_info.monspecs.vfmax;
1356 upper_margin += lines;
1357 lower_margin += lines;
1359 } else if (vfreq > fb_info.monspecs.vfmax && doubleline) {
1360 /* Doubleline too high -> enlarge margins */
1363 (hfreq * 2) / (par->VFT + 1 + 4 * lines) >
1364 fb_info.monspecs.vfmax;
1367 upper_margin += lines;
1368 lower_margin += lines;
1370 } else if (vfreq > fb_info.monspecs.vfmax && interlace) {
1371 /* Interlace, too high -> enlarge margins */
1374 (hfreq * 2) / (par->VFT + 1 + 4 * lines) >
1375 fb_info.monspecs.vfmax;
1378 upper_margin += lines;
1379 lower_margin += lines;
1381 } else if (vfreq < fb_info.monspecs.vfmin ||
1382 vfreq > fb_info.monspecs.vfmax)
1386 linelen = xres_virtual * bpp / 8;
1387 if (yres_virtual * linelen > screen_len && screen_len)
1389 if (yres * linelen > screen_len && screen_len)
1391 if (var->yoffset + yres > yres_virtual && yres_virtual)
1393 par->yres_virtual = yres_virtual;
1394 par->screen_base = screen_base + var->yoffset * linelen;
1395 par->hw.falcon.xoffset = 0;
1397 // FIXME!!! sort of works, no crash
1398 //par->next_line = linelen;
1399 //par->next_plane = yres_virtual * linelen;
1400 par->next_line = linelen;
1401 par->next_plane = 2;
1403 //par->next_plane = linelen;
1404 //par->next_line = yres_virtual * linelen;
1409 static int falcon_encode_var(struct fb_var_screeninfo *var,
1410 struct atafb_par *par)
1412 /* !!! only for VGA !!! */
1415 int hdb_off, hde_off, base_off;
1416 struct falcon_hw *hw = &par->hw.falcon;
1418 memset(var, 0, sizeof(struct fb_var_screeninfo));
1419 /* possible frequencies: 25.175 or 32MHz */
1420 var->pixclock = hw->sync & 0x1 ? fext.t :
1421 hw->vid_control & VCO_CLOCK25 ? f25.t : f32.t;
1427 if (hw->vid_control & VCO_HSYPOS)
1428 var->sync |= FB_SYNC_HOR_HIGH_ACT;
1429 if (hw->vid_control & VCO_VSYPOS)
1430 var->sync |= FB_SYNC_VERT_HIGH_ACT;
1432 var->vmode = FB_VMODE_NONINTERLACED;
1433 if (hw->vid_mode & VMO_INTER)
1434 var->vmode |= FB_VMODE_INTERLACED;
1435 if (hw->vid_mode & VMO_DOUBLE)
1436 var->vmode |= FB_VMODE_DOUBLE;
1438 /* visible y resolution:
1439 * Graphics display starts at line VDB and ends at line
1440 * VDE. If interlace mode off unit of VC-registers is
1441 * half lines, else lines.
1443 var->yres = hw->vde - hw->vdb;
1444 if (!(var->vmode & FB_VMODE_INTERLACED))
1446 if (var->vmode & FB_VMODE_DOUBLE)
1450 * to get bpp, we must examine f_shift and st_shift.
1451 * f_shift is valid if any of bits no. 10, 8 or 4
1452 * is set. Priority in f_shift is: 10 ">" 8 ">" 4, i.e.
1453 * if bit 10 set then bit 8 and bit 4 don't care...
1454 * If all these bits are 0 get display depth from st_shift
1455 * (as for ST and STE)
1457 if (hw->f_shift & 0x400) /* 2 colors */
1458 var->bits_per_pixel = 1;
1459 else if (hw->f_shift & 0x100) /* hicolor */
1460 var->bits_per_pixel = 16;
1461 else if (hw->f_shift & 0x010) /* 8 bitplanes */
1462 var->bits_per_pixel = 8;
1463 else if (hw->st_shift == 0)
1464 var->bits_per_pixel = 4;
1465 else if (hw->st_shift == 0x100)
1466 var->bits_per_pixel = 2;
1467 else /* if (hw->st_shift == 0x200) */
1468 var->bits_per_pixel = 1;
1470 var->xres = hw->line_width * 16 / var->bits_per_pixel;
1471 var->xres_virtual = var->xres + hw->line_offset * 16 / var->bits_per_pixel;
1473 var->xres_virtual += 16;
1475 if (var->bits_per_pixel == 16) {
1476 var->red.offset = 11;
1477 var->red.length = 5;
1478 var->red.msb_right = 0;
1479 var->green.offset = 5;
1480 var->green.length = 6;
1481 var->green.msb_right = 0;
1482 var->blue.offset = 0;
1483 var->blue.length = 5;
1484 var->blue.msb_right = 0;
1486 var->red.offset = 0;
1487 var->red.length = hw->ste_mode ? 4 : 6;
1488 if (var->red.length > var->bits_per_pixel)
1489 var->red.length = var->bits_per_pixel;
1490 var->red.msb_right = 0;
1492 var->blue = var->green = var->red;
1494 var->transp.offset = 0;
1495 var->transp.length = 0;
1496 var->transp.msb_right = 0;
1498 linelen = var->xres_virtual * var->bits_per_pixel / 8;
1500 if (par->yres_virtual)
1501 var->yres_virtual = par->yres_virtual;
1503 /* yres_virtual == 0 means use maximum */
1504 var->yres_virtual = screen_len / linelen;
1507 var->yres_virtual = 2 * var->yres;
1509 var->yres_virtual = var->yres + hwscroll * 16;
1511 var->xoffset = 0; /* TODO change this */
1514 prescale = hxx_prescale(hw);
1515 plen = 4 >> (hw->vid_mode >> 2 & 0x3);
1516 base_off = hw->vid_control & VCO_SHORTOFFS ? 64 : 128;
1517 if (hw->f_shift & 0x100) {
1519 hdb_off = (base_off + 16 * plen) + prescale;
1521 hde_off = ((128 / var->bits_per_pixel + 2) * plen);
1523 hdb_off = (64 + base_off + (128 / var->bits_per_pixel + 2) * plen)
1526 hdb_off = (base_off + (128 / var->bits_per_pixel + 18) * plen)
1530 /* Right margin includes hsync */
1531 var->left_margin = hdb_off + prescale * ((hw->hdb & 0x1ff) -
1532 (hw->hdb & 0x200 ? 2 + hw->hht : 0));
1533 if (hw->ste_mode || mon_type != F_MON_VGA)
1534 var->right_margin = prescale * (hw->hht + 2 - hw->hde) - hde_off;
1536 /* can't use this in ste_mode, because hbb is +1 off */
1537 var->right_margin = prescale * (hw->hht + 2 - hw->hbb);
1538 var->hsync_len = prescale * (hw->hht + 2 - hw->hss);
1540 /* Lower margin includes vsync */
1541 var->upper_margin = hw->vdb / 2; /* round down to full lines */
1542 var->lower_margin = (hw->vft + 1 - hw->vde + 1) / 2; /* round up */
1543 var->vsync_len = (hw->vft + 1 - hw->vss + 1) / 2; /* round up */
1544 if (var->vmode & FB_VMODE_INTERLACED) {
1545 var->upper_margin *= 2;
1546 var->lower_margin *= 2;
1547 var->vsync_len *= 2;
1548 } else if (var->vmode & FB_VMODE_DOUBLE) {
1549 var->upper_margin = (var->upper_margin + 1) / 2;
1550 var->lower_margin = (var->lower_margin + 1) / 2;
1551 var->vsync_len = (var->vsync_len + 1) / 2;
1554 var->pixclock *= plen;
1555 var->left_margin /= plen;
1556 var->right_margin /= plen;
1557 var->hsync_len /= plen;
1559 var->right_margin -= var->hsync_len;
1560 var->lower_margin -= var->vsync_len;
1563 var->yoffset = (par->screen_base - screen_base) / linelen;
1566 var->nonstd = 0; /* what is this for? */
1571 static int f_change_mode;
1572 static struct falcon_hw f_new_mode;
1573 static int f_pan_display;
1575 static void falcon_get_par(struct atafb_par *par)
1578 struct falcon_hw *hw = &par->hw.falcon;
1580 hw->line_width = shifter_f030.scn_width;
1581 hw->line_offset = shifter_f030.off_next;
1582 hw->st_shift = videl.st_shift & 0x300;
1583 hw->f_shift = videl.f_shift;
1584 hw->vid_control = videl.control;
1585 hw->vid_mode = videl.mode;
1586 hw->sync = shifter.syncmode & 0x1;
1587 hw->xoffset = videl.xoffset & 0xf;
1588 hw->hht = videl.hht;
1589 hw->hbb = videl.hbb;
1590 hw->hbe = videl.hbe;
1591 hw->hdb = videl.hdb;
1592 hw->hde = videl.hde;
1593 hw->hss = videl.hss;
1594 hw->vft = videl.vft;
1595 hw->vbb = videl.vbb;
1596 hw->vbe = videl.vbe;
1597 hw->vdb = videl.vdb;
1598 hw->vde = videl.vde;
1599 hw->vss = videl.vss;
1601 addr = (shifter.bas_hi & 0xff) << 16 |
1602 (shifter.bas_md & 0xff) << 8 |
1603 (shifter.bas_lo & 0xff);
1604 par->screen_base = phys_to_virt(addr);
1606 /* derived parameters */
1607 hw->ste_mode = (hw->f_shift & 0x510) == 0 && hw->st_shift == 0x100;
1608 hw->mono = (hw->f_shift & 0x400) ||
1609 ((hw->f_shift & 0x510) == 0 && hw->st_shift == 0x200);
1612 static void falcon_set_par(struct atafb_par *par)
1616 /* only set screen_base if really necessary */
1617 if (current_par.screen_base != par->screen_base)
1618 fbhw->set_screen_base(par->screen_base);
1620 /* Don't touch any other registers if we keep the default resolution */
1624 /* Tell vbl-handler to change video mode.
1625 * We change modes only on next VBL, to avoid desynchronisation
1626 * (a shift to the right and wrap around by a random number of pixels
1627 * in all monochrome modes).
1628 * This seems to work on my Falcon.
1630 f_new_mode = par->hw.falcon;
1634 static irqreturn_t falcon_vbl_switcher(int irq, void *dummy)
1636 struct falcon_hw *hw = &f_new_mode;
1638 if (f_change_mode) {
1641 if (hw->sync & 0x1) {
1642 /* Enable external pixelclock. This code only for ScreenWonder */
1643 *(volatile unsigned short *)0xffff9202 = 0xffbf;
1645 /* Turn off external clocks. Read sets all output bits to 1. */
1646 *(volatile unsigned short *)0xffff9202;
1648 shifter.syncmode = hw->sync;
1650 videl.hht = hw->hht;
1651 videl.hbb = hw->hbb;
1652 videl.hbe = hw->hbe;
1653 videl.hdb = hw->hdb;
1654 videl.hde = hw->hde;
1655 videl.hss = hw->hss;
1656 videl.vft = hw->vft;
1657 videl.vbb = hw->vbb;
1658 videl.vbe = hw->vbe;
1659 videl.vdb = hw->vdb;
1660 videl.vde = hw->vde;
1661 videl.vss = hw->vss;
1663 videl.f_shift = 0; /* write enables Falcon palette, 0: 4 planes */
1665 videl.st_shift = hw->st_shift; /* write enables STE palette */
1668 * set st_shift 0, so we can tell the screen-depth if f_shift == 0.
1669 * Writing 0 to f_shift enables 4 plane Falcon mode but
1670 * doesn't set st_shift. st_shift != 0 (!= 4planes) is impossible
1671 * with Falcon palette.
1674 /* now back to Falcon palette mode */
1675 videl.f_shift = hw->f_shift;
1677 /* writing to st_shift changed scn_width and vid_mode */
1678 videl.xoffset = hw->xoffset;
1679 shifter_f030.scn_width = hw->line_width;
1680 shifter_f030.off_next = hw->line_offset;
1681 videl.control = hw->vid_control;
1682 videl.mode = hw->vid_mode;
1684 if (f_pan_display) {
1686 videl.xoffset = current_par.hw.falcon.xoffset;
1687 shifter_f030.off_next = current_par.hw.falcon.line_offset;
1692 static int falcon_pan_display(struct fb_var_screeninfo *var,
1693 struct fb_info *info)
1695 struct atafb_par *par = (struct atafb_par *)info->par;
1698 int bpp = info->var.bits_per_pixel;
1701 var->xoffset = up(var->xoffset, 32);
1703 par->hw.falcon.xoffset = var->xoffset & 15;
1705 par->hw.falcon.xoffset = 0;
1706 var->xoffset = up(var->xoffset, 2);
1708 par->hw.falcon.line_offset = bpp *
1709 (info->var.xres_virtual - info->var.xres) / 16;
1710 if (par->hw.falcon.xoffset)
1711 par->hw.falcon.line_offset -= bpp;
1712 xoffset = var->xoffset - par->hw.falcon.xoffset;
1714 par->screen_base = screen_base +
1715 (var->yoffset * info->var.xres_virtual + xoffset) * bpp / 8;
1716 if (fbhw->set_screen_base)
1717 fbhw->set_screen_base(par->screen_base);
1719 return -EINVAL; /* shouldn't happen */
1724 static int falcon_setcolreg(unsigned int regno, unsigned int red,
1725 unsigned int green, unsigned int blue,
1726 unsigned int transp, struct fb_info *info)
1730 f030_col[regno] = (((red & 0xfc00) << 16) |
1731 ((green & 0xfc00) << 8) |
1732 ((blue & 0xfc00) >> 8));
1734 shifter_tt.color_reg[regno] =
1735 (((red & 0xe000) >> 13) | ((red & 0x1000) >> 12) << 8) |
1736 (((green & 0xe000) >> 13) | ((green & 0x1000) >> 12) << 4) |
1737 ((blue & 0xe000) >> 13) | ((blue & 0x1000) >> 12);
1738 #ifdef FBCON_HAS_CFB16
1739 fbcon_cfb16_cmap[regno] = ((red & 0xf800) |
1740 ((green & 0xfc00) >> 5) |
1741 ((blue & 0xf800) >> 11));
1747 static int falcon_blank(int blank_mode)
1749 /* ++guenther: we can switch off graphics by changing VDB and VDE,
1750 * so VIDEL doesn't hog the bus while saving.
1751 * (this may affect usleep()).
1753 int vdb, vss, hbe, hss;
1755 if (mon_type == F_MON_SM) /* this doesn't work on SM124 */
1758 vdb = current_par.VDB;
1759 vss = current_par.VSS;
1760 hbe = current_par.HBE;
1761 hss = current_par.HSS;
1763 if (blank_mode >= 1) {
1764 /* disable graphics output (this speeds up the CPU) ... */
1765 vdb = current_par.VFT + 1;
1766 /* ... and blank all lines */
1767 hbe = current_par.HHT + 2;
1769 /* use VESA suspend modes on VGA monitors */
1770 if (mon_type == F_MON_VGA) {
1771 if (blank_mode == 2 || blank_mode == 4)
1772 vss = current_par.VFT + 1;
1773 if (blank_mode == 3 || blank_mode == 4)
1774 hss = current_par.HHT + 2;
1785 static int falcon_detect(void)
1787 struct atafb_par par;
1790 /* Determine connected monitor and set monitor parameters */
1791 fhw = *(unsigned char *)0xffff8006;
1792 mon_type = fhw >> 6 & 0x3;
1793 /* bit 1 of fhw: 1=32 bit ram bus, 0=16 bit */
1794 f030_bus_width = fhw << 6 & 0x80;
1797 fb_info.monspecs.vfmin = 70;
1798 fb_info.monspecs.vfmax = 72;
1799 fb_info.monspecs.hfmin = 35713;
1800 fb_info.monspecs.hfmax = 35715;
1805 fb_info.monspecs.vfmin = 49; /* not 50, since TOS defaults to 49.9x Hz */
1806 fb_info.monspecs.vfmax = 60;
1807 fb_info.monspecs.hfmin = 15620;
1808 fb_info.monspecs.hfmax = 15755;
1811 /* initialize hsync-len */
1812 f25.hsync = h_syncs[mon_type] / f25.t;
1813 f32.hsync = h_syncs[mon_type] / f32.t;
1815 fext.hsync = h_syncs[mon_type] / fext.t;
1817 falcon_get_par(&par);
1818 falcon_encode_var(&atafb_predefined[0], &par);
1820 /* Detected mode is always the "autodetect" slot */
1824 #endif /* ATAFB_FALCON */
1826 /* ------------------- ST(E) specific functions ---------------------- */
1830 static int stste_encode_fix(struct fb_fix_screeninfo *fix,
1831 struct atafb_par *par)
1835 strcpy(fix->id, "Atari Builtin");
1836 fix->smem_start = (unsigned long)real_screen_base;
1837 fix->smem_len = screen_len;
1838 fix->type = FB_TYPE_INTERLEAVED_PLANES;
1840 fix->visual = FB_VISUAL_PSEUDOCOLOR;
1841 mode = par->hw.st.mode & 3;
1842 if (mode == ST_HIGH) {
1843 fix->type = FB_TYPE_PACKED_PIXELS;
1845 fix->visual = FB_VISUAL_MONO10;
1847 if (ATARIHW_PRESENT(EXTD_SHIFTER)) {
1855 fix->line_length = 0;
1856 fix->accel = FB_ACCEL_ATARIBLITT;
1860 static int stste_decode_var(struct fb_var_screeninfo *var,
1861 struct atafb_par *par)
1863 int xres = var->xres;
1864 int yres = var->yres;
1865 int bpp = var->bits_per_pixel;
1867 int yres_virtual = var->yres_virtual;
1870 if (bpp > 1 || xres > sttt_xres || yres > st_yres)
1872 par->hw.st.mode = ST_HIGH;
1877 if (bpp > 4 || xres > sttt_xres || yres > st_yres)
1880 if (xres > sttt_xres / 2 || yres > st_yres / 2)
1882 par->hw.st.mode = ST_LOW;
1883 xres = sttt_xres / 2;
1886 } else if (bpp > 1) {
1887 if (xres > sttt_xres || yres > st_yres / 2)
1889 par->hw.st.mode = ST_MID;
1896 if (yres_virtual <= 0)
1898 else if (yres_virtual < yres)
1899 yres_virtual = yres;
1900 if (var->sync & FB_SYNC_EXT)
1901 par->hw.st.sync = (par->hw.st.sync & ~1) | 1;
1903 par->hw.st.sync = (par->hw.st.sync & ~1);
1904 linelen = xres * bpp / 8;
1905 if (yres_virtual * linelen > screen_len && screen_len)
1907 if (yres * linelen > screen_len && screen_len)
1909 if (var->yoffset + yres > yres_virtual && yres_virtual)
1911 par->yres_virtual = yres_virtual;
1912 par->screen_base = screen_base + var->yoffset * linelen;
1916 static int stste_encode_var(struct fb_var_screeninfo *var,
1917 struct atafb_par *par)
1920 memset(var, 0, sizeof(struct fb_var_screeninfo));
1921 var->red.offset = 0;
1922 var->red.length = ATARIHW_PRESENT(EXTD_SHIFTER) ? 4 : 3;
1923 var->red.msb_right = 0;
1926 var->pixclock = 31041;
1927 var->left_margin = 120; /* these are incorrect */
1928 var->right_margin = 100;
1929 var->upper_margin = 8;
1930 var->lower_margin = 16;
1931 var->hsync_len = 140;
1932 var->vsync_len = 30;
1937 if (!(par->hw.st.sync & 1))
1940 var->sync = FB_SYNC_EXT;
1942 switch (par->hw.st.mode & 3) {
1944 var->xres = sttt_xres / 2;
1945 var->yres = st_yres / 2;
1946 var->bits_per_pixel = 4;
1949 var->xres = sttt_xres;
1950 var->yres = st_yres / 2;
1951 var->bits_per_pixel = 2;
1954 var->xres = sttt_xres;
1955 var->yres = st_yres;
1956 var->bits_per_pixel = 1;
1959 var->blue = var->green = var->red;
1960 var->transp.offset = 0;
1961 var->transp.length = 0;
1962 var->transp.msb_right = 0;
1963 var->xres_virtual = sttt_xres_virtual;
1964 linelen = var->xres_virtual * var->bits_per_pixel / 8;
1965 ovsc_addlen = linelen * (sttt_yres_virtual - st_yres);
1968 var->yres_virtual = var->yres;
1969 else if (screen_len) {
1970 if (par->yres_virtual)
1971 var->yres_virtual = par->yres_virtual;
1973 /* yres_virtual == 0 means use maximum */
1974 var->yres_virtual = screen_len / linelen;
1977 var->yres_virtual = 2 * var->yres;
1979 var->yres_virtual = var->yres + hwscroll * 16;
1983 var->yoffset = (par->screen_base - screen_base) / linelen;
1988 var->vmode = FB_VMODE_NONINTERLACED;
1992 static void stste_get_par(struct atafb_par *par)
1995 par->hw.st.mode = shifter_tt.st_shiftmode;
1996 par->hw.st.sync = shifter.syncmode;
1997 addr = ((shifter.bas_hi & 0xff) << 16) |
1998 ((shifter.bas_md & 0xff) << 8);
1999 if (ATARIHW_PRESENT(EXTD_SHIFTER))
2000 addr |= (shifter.bas_lo & 0xff);
2001 par->screen_base = phys_to_virt(addr);
2004 static void stste_set_par(struct atafb_par *par)
2006 shifter_tt.st_shiftmode = par->hw.st.mode;
2007 shifter.syncmode = par->hw.st.sync;
2008 /* only set screen_base if really necessary */
2009 if (current_par.screen_base != par->screen_base)
2010 fbhw->set_screen_base(par->screen_base);
2013 static int stste_setcolreg(unsigned int regno, unsigned int red,
2014 unsigned int green, unsigned int blue,
2015 unsigned int transp, struct fb_info *info)
2022 if (ATARIHW_PRESENT(EXTD_SHIFTER))
2023 shifter_tt.color_reg[regno] =
2024 (((red & 0xe) >> 1) | ((red & 1) << 3) << 8) |
2025 (((green & 0xe) >> 1) | ((green & 1) << 3) << 4) |
2026 ((blue & 0xe) >> 1) | ((blue & 1) << 3);
2028 shifter_tt.color_reg[regno] =
2029 ((red & 0xe) << 7) |
2030 ((green & 0xe) << 3) |
2031 ((blue & 0xe) >> 1);
2035 static int stste_detect(void)
2037 struct atafb_par par;
2039 /* Determine the connected monitor: The DMA sound must be
2040 * disabled before reading the MFP GPIP, because the Sound
2041 * Done Signal and the Monochrome Detect are XORed together!
2043 if (ATARIHW_PRESENT(PCM_8BIT)) {
2044 tt_dmasnd.ctrl = DMASND_CTRL_OFF;
2045 udelay(20); /* wait a while for things to settle down */
2047 mono_moni = (mfp.par_dt_reg & 0x80) == 0;
2049 stste_get_par(&par);
2050 stste_encode_var(&atafb_predefined[0], &par);
2052 if (!ATARIHW_PRESENT(EXTD_SHIFTER))
2057 static void stste_set_screen_base(void *s_base)
2060 addr = virt_to_phys(s_base);
2061 /* Setup Screen Memory */
2062 shifter.bas_hi = (unsigned char)((addr & 0xff0000) >> 16);
2063 shifter.bas_md = (unsigned char)((addr & 0x00ff00) >> 8);
2064 if (ATARIHW_PRESENT(EXTD_SHIFTER))
2065 shifter.bas_lo = (unsigned char)(addr & 0x0000ff);
2068 #endif /* ATAFB_STE */
2070 /* Switching the screen size should be done during vsync, otherwise
2071 * the margins may get messed up. This is a well known problem of
2072 * the ST's video system.
2074 * Unfortunately there is hardly any way to find the vsync, as the
2075 * vertical blank interrupt is no longer in time on machines with
2076 * overscan type modifications.
2078 * We can, however, use Timer B to safely detect the black shoulder,
2079 * but then we've got to guess an appropriate delay to find the vsync.
2080 * This might not work on every machine.
2082 * martin_rogge @ ki.maus.de, 8th Aug 1995
2085 #define LINE_DELAY (mono_moni ? 30 : 70)
2086 #define SYNC_DELAY (mono_moni ? 1500 : 2000)
2088 /* SWITCH_ACIA may be used for Falcon (ScreenBlaster III internal!) */
2089 static void st_ovsc_switch(void)
2091 unsigned long flags;
2092 register unsigned char old, new;
2094 if (!(atari_switches & ATARI_SWITCH_OVSC_MASK))
2096 local_irq_save(flags);
2098 mfp.tim_ct_b = 0x10;
2099 mfp.active_edge |= 8;
2101 mfp.tim_dt_b = 0xf0;
2103 while (mfp.tim_dt_b > 1) /* TOS does it this way, don't ask why */
2110 } while (old != new);
2111 mfp.tim_ct_b = 0x10;
2114 if (atari_switches & ATARI_SWITCH_OVSC_IKBD)
2115 acia.key_ctrl = ACIA_DIV64 | ACIA_D8N1S | ACIA_RHTID | ACIA_RIE;
2116 if (atari_switches & ATARI_SWITCH_OVSC_MIDI)
2117 acia.mid_ctrl = ACIA_DIV16 | ACIA_D8N1S | ACIA_RHTID;
2118 if (atari_switches & (ATARI_SWITCH_OVSC_SND6|ATARI_SWITCH_OVSC_SND7)) {
2119 sound_ym.rd_data_reg_sel = 14;
2120 sound_ym.wd_data = sound_ym.rd_data_reg_sel |
2121 ((atari_switches & ATARI_SWITCH_OVSC_SND6) ? 0x40:0) |
2122 ((atari_switches & ATARI_SWITCH_OVSC_SND7) ? 0x80:0);
2124 local_irq_restore(flags);
2127 /* ------------------- External Video ---------------------- */
2131 static int ext_encode_fix(struct fb_fix_screeninfo *fix, struct atafb_par *par)
2133 strcpy(fix->id, "Unknown Extern");
2134 fix->smem_start = (unsigned long)external_addr;
2135 fix->smem_len = PAGE_ALIGN(external_len);
2136 if (external_depth == 1) {
2137 fix->type = FB_TYPE_PACKED_PIXELS;
2138 /* The letters 'n' and 'i' in the "atavideo=external:" stand
2139 * for "normal" and "inverted", rsp., in the monochrome case */
2141 (external_pmode == FB_TYPE_INTERLEAVED_PLANES ||
2142 external_pmode == FB_TYPE_PACKED_PIXELS) ?
2143 FB_VISUAL_MONO10 : FB_VISUAL_MONO01;
2145 /* Use STATIC if we don't know how to access color registers */
2146 int visual = external_vgaiobase ?
2147 FB_VISUAL_PSEUDOCOLOR :
2148 FB_VISUAL_STATIC_PSEUDOCOLOR;
2149 switch (external_pmode) {
2150 case -1: /* truecolor */
2151 fix->type = FB_TYPE_PACKED_PIXELS;
2152 fix->visual = FB_VISUAL_TRUECOLOR;
2154 case FB_TYPE_PACKED_PIXELS:
2155 fix->type = FB_TYPE_PACKED_PIXELS;
2156 fix->visual = visual;
2158 case FB_TYPE_PLANES:
2159 fix->type = FB_TYPE_PLANES;
2160 fix->visual = visual;
2162 case FB_TYPE_INTERLEAVED_PLANES:
2163 fix->type = FB_TYPE_INTERLEAVED_PLANES;
2165 fix->visual = visual;
2172 fix->line_length = 0;
2176 static int ext_decode_var(struct fb_var_screeninfo *var, struct atafb_par *par)
2178 struct fb_var_screeninfo *myvar = &atafb_predefined[0];
2180 if (var->bits_per_pixel > myvar->bits_per_pixel ||
2181 var->xres > myvar->xres ||
2182 var->xres_virtual > myvar->xres_virtual ||
2183 var->yres > myvar->yres ||
2190 static int ext_encode_var(struct fb_var_screeninfo *var, struct atafb_par *par)
2192 memset(var, 0, sizeof(struct fb_var_screeninfo));
2193 var->red.offset = 0;
2194 var->red.length = (external_pmode == -1) ? external_depth / 3 :
2195 (external_vgaiobase ? external_bitspercol : 0);
2196 var->red.msb_right = 0;
2199 var->pixclock = 31041;
2200 var->left_margin = 120; /* these are surely incorrect */
2201 var->right_margin = 100;
2202 var->upper_margin = 8;
2203 var->lower_margin = 16;
2204 var->hsync_len = 140;
2205 var->vsync_len = 30;
2212 var->xres = external_xres;
2213 var->yres = external_yres;
2214 var->xres_virtual = external_xres_virtual;
2215 var->bits_per_pixel = external_depth;
2217 var->blue = var->green = var->red;
2218 var->transp.offset = 0;
2219 var->transp.length = 0;
2220 var->transp.msb_right = 0;
2221 var->yres_virtual = var->yres;
2226 var->vmode = FB_VMODE_NONINTERLACED;
2230 static void ext_get_par(struct atafb_par *par)
2232 par->screen_base = external_addr;
2235 static void ext_set_par(struct atafb_par *par)
2239 #define OUTB(port,val) \
2240 *((unsigned volatile char *) ((port)+external_vgaiobase)) = (val)
2242 (*((unsigned volatile char *) ((port)+external_vgaiobase)))
2245 unsigned char tmp = INB(0x3da); \
2249 static int ext_setcolreg(unsigned int regno, unsigned int red,
2250 unsigned int green, unsigned int blue,
2251 unsigned int transp, struct fb_info *info)
2253 unsigned char colmask = (1 << external_bitspercol) - 1;
2255 if (!external_vgaiobase)
2258 switch (external_card_type) {
2262 OUTB(0x3c9, red & colmask);
2264 OUTB(0x3c9, green & colmask);
2266 OUTB(0x3c9, blue & colmask);
2271 OUTB((MV300_reg[regno] << 2) + 1, red);
2272 OUTB((MV300_reg[regno] << 2) + 1, green);
2273 OUTB((MV300_reg[regno] << 2) + 1, blue);
2281 static int ext_detect(void)
2283 struct fb_var_screeninfo *myvar = &atafb_predefined[0];
2284 struct atafb_par dummy_par;
2286 myvar->xres = external_xres;
2287 myvar->xres_virtual = external_xres_virtual;
2288 myvar->yres = external_yres;
2289 myvar->bits_per_pixel = external_depth;
2290 ext_encode_var(myvar, &dummy_par);
2294 #endif /* ATAFB_EXT */
2296 /* ------ This is the same for most hardware types -------- */
2298 static void set_screen_base(void *s_base)
2302 addr = virt_to_phys(s_base);
2303 /* Setup Screen Memory */
2304 shifter.bas_hi = (unsigned char)((addr & 0xff0000) >> 16);
2305 shifter.bas_md = (unsigned char)((addr & 0x00ff00) >> 8);
2306 shifter.bas_lo = (unsigned char)(addr & 0x0000ff);
2309 static int pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
2311 struct atafb_par *par = (struct atafb_par *)info->par;
2313 if (!fbhw->set_screen_base ||
2314 (!ATARIHW_PRESENT(EXTD_SHIFTER) && var->xoffset))
2316 var->xoffset = up(var->xoffset, 16);
2317 par->screen_base = screen_base +
2318 (var->yoffset * info->var.xres_virtual + var->xoffset)
2319 * info->var.bits_per_pixel / 8;
2320 fbhw->set_screen_base(par->screen_base);
2324 /* ------------ Interfaces to hardware functions ------------ */
2327 static struct fb_hwswitch tt_switch = {
2328 .detect = tt_detect,
2329 .encode_fix = tt_encode_fix,
2330 .decode_var = tt_decode_var,
2331 .encode_var = tt_encode_var,
2332 .get_par = tt_get_par,
2333 .set_par = tt_set_par,
2334 .set_screen_base = set_screen_base,
2335 .pan_display = pan_display,
2340 static struct fb_hwswitch falcon_switch = {
2341 .detect = falcon_detect,
2342 .encode_fix = falcon_encode_fix,
2343 .decode_var = falcon_decode_var,
2344 .encode_var = falcon_encode_var,
2345 .get_par = falcon_get_par,
2346 .set_par = falcon_set_par,
2347 .set_screen_base = set_screen_base,
2348 .blank = falcon_blank,
2349 .pan_display = falcon_pan_display,
2354 static struct fb_hwswitch st_switch = {
2355 .detect = stste_detect,
2356 .encode_fix = stste_encode_fix,
2357 .decode_var = stste_decode_var,
2358 .encode_var = stste_encode_var,
2359 .get_par = stste_get_par,
2360 .set_par = stste_set_par,
2361 .set_screen_base = stste_set_screen_base,
2362 .pan_display = pan_display
2367 static struct fb_hwswitch ext_switch = {
2368 .detect = ext_detect,
2369 .encode_fix = ext_encode_fix,
2370 .decode_var = ext_decode_var,
2371 .encode_var = ext_encode_var,
2372 .get_par = ext_get_par,
2373 .set_par = ext_set_par,
2377 static void ata_get_par(struct atafb_par *par)
2379 if (current_par_valid)
2385 static void ata_set_par(struct atafb_par *par)
2389 current_par_valid = 1;
2393 /* =========================================================== */
2394 /* ============== Hardware Independent Functions ============= */
2395 /* =========================================================== */
2397 /* used for hardware scrolling */
2399 static int do_fb_set_var(struct fb_var_screeninfo *var, int isactive)
2402 struct atafb_par par;
2404 err = fbhw->decode_var(var, &par);
2407 activate = var->activate;
2408 if (((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) && isactive)
2410 fbhw->encode_var(var, &par);
2411 var->activate = activate;
2415 static int atafb_get_fix(struct fb_fix_screeninfo *fix, struct fb_info *info)
2417 struct atafb_par par;
2419 // Get fix directly (case con == -1 before)??
2420 err = fbhw->decode_var(&info->var, &par);
2423 memset(fix, 0, sizeof(struct fb_fix_screeninfo));
2424 return fbhw->encode_fix(fix, &par);
2427 static int atafb_get_var(struct fb_var_screeninfo *var, struct fb_info *info)
2429 struct atafb_par par;
2432 fbhw->encode_var(var, &par);
2437 // No longer called by fbcon!
2438 // Still called by set_var internally
2440 static void atafb_set_disp(struct fb_info *info)
2442 atafb_get_var(&info->var, info);
2443 atafb_get_fix(&info->fix, info);
2445 info->screen_base = (void *)info->fix.smem_start;
2447 switch (info->fix.type) {
2448 case FB_TYPE_INTERLEAVED_PLANES:
2449 switch (info->var.bits_per_pixel) {
2451 // display->dispsw = &fbcon_iplan2p2;
2454 // display->dispsw = &fbcon_iplan2p4;
2457 // display->dispsw = &fbcon_iplan2p8;
2461 case FB_TYPE_PACKED_PIXELS:
2462 switch (info->var.bits_per_pixel) {
2463 #ifdef FBCON_HAS_MFB
2465 // display->dispsw = &fbcon_mfb;
2468 #ifdef FBCON_HAS_CFB8
2470 // display->dispsw = &fbcon_cfb8;
2473 #ifdef FBCON_HAS_CFB16
2475 // display->dispsw = &fbcon_cfb16;
2476 // display->dispsw_data = fbcon_cfb16_cmap;
2484 static int atafb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
2485 u_int transp, struct fb_info *info)
2491 return info->fbops->fb_setcolreg(regno, red, green, blue, transp, info);
2495 atafb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
2497 int xoffset = var->xoffset;
2498 int yoffset = var->yoffset;
2501 if (var->vmode & FB_VMODE_YWRAP) {
2502 if (yoffset < 0 || yoffset >= info->var.yres_virtual || xoffset)
2505 if (xoffset + info->var.xres > info->var.xres_virtual ||
2506 yoffset + info->var.yres > info->var.yres_virtual)
2510 if (fbhw->pan_display) {
2511 err = fbhw->pan_display(var, info);
2517 info->var.xoffset = xoffset;
2518 info->var.yoffset = yoffset;
2520 if (var->vmode & FB_VMODE_YWRAP)
2521 info->var.vmode |= FB_VMODE_YWRAP;
2523 info->var.vmode &= ~FB_VMODE_YWRAP;
2529 * generic drawing routines; imageblit needs updating for image depth > 1
2532 #if BITS_PER_LONG == 32
2533 #define BYTES_PER_LONG 4
2534 #define SHIFT_PER_LONG 5
2535 #elif BITS_PER_LONG == 64
2536 #define BYTES_PER_LONG 8
2537 #define SHIFT_PER_LONG 6
2539 #define Please update me
2543 static void atafb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
2545 struct atafb_par *par = (struct atafb_par *)info->par;
2549 if (!rect->width || !rect->height)
2553 * We could use hardware clipping but on many cards you get around
2554 * hardware clipping by writing to framebuffer directly.
2556 x2 = rect->dx + rect->width;
2557 y2 = rect->dy + rect->height;
2558 x2 = x2 < info->var.xres_virtual ? x2 : info->var.xres_virtual;
2559 y2 = y2 < info->var.yres_virtual ? y2 : info->var.yres_virtual;
2560 width = x2 - rect->dx;
2561 height = y2 - rect->dy;
2563 if (info->var.bits_per_pixel == 1)
2564 atafb_mfb_fillrect(info, par->next_line, rect->color,
2565 rect->dy, rect->dx, height, width);
2566 else if (info->var.bits_per_pixel == 2)
2567 atafb_iplan2p2_fillrect(info, par->next_line, rect->color,
2568 rect->dy, rect->dx, height, width);
2569 else if (info->var.bits_per_pixel == 4)
2570 atafb_iplan2p4_fillrect(info, par->next_line, rect->color,
2571 rect->dy, rect->dx, height, width);
2573 atafb_iplan2p8_fillrect(info, par->next_line, rect->color,
2574 rect->dy, rect->dx, height, width);
2579 static void atafb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
2581 struct atafb_par *par = (struct atafb_par *)info->par;
2583 u32 dx, dy, sx, sy, width, height;
2586 /* clip the destination */
2587 x2 = area->dx + area->width;
2588 y2 = area->dy + area->height;
2589 dx = area->dx > 0 ? area->dx : 0;
2590 dy = area->dy > 0 ? area->dy : 0;
2591 x2 = x2 < info->var.xres_virtual ? x2 : info->var.xres_virtual;
2592 y2 = y2 < info->var.yres_virtual ? y2 : info->var.yres_virtual;
2597 sx = area->sx + (dx - area->dx);
2598 sy = area->sy + (dy - area->dy);
2600 /* the source must be completely inside the virtual screen */
2601 if (sx < 0 || sy < 0 || (sx + width) > info->var.xres_virtual ||
2602 (sy + height) > info->var.yres_virtual)
2605 if (dy > sy || (dy == sy && dx > sx)) {
2611 if (info->var.bits_per_pixel == 1)
2612 atafb_mfb_copyarea(info, par->next_line, sy, sx, dy, dx, height, width);
2613 else if (info->var.bits_per_pixel == 2)
2614 atafb_iplan2p2_copyarea(info, par->next_line, sy, sx, dy, dx, height, width);
2615 else if (info->var.bits_per_pixel == 4)
2616 atafb_iplan2p4_copyarea(info, par->next_line, sy, sx, dy, dx, height, width);
2618 atafb_iplan2p8_copyarea(info, par->next_line, sy, sx, dy, dx, height, width);
2623 static void atafb_imageblit(struct fb_info *info, const struct fb_image *image)
2625 struct atafb_par *par = (struct atafb_par *)info->par;
2630 u32 dx, dy, width, height, pitch;
2633 * We could use hardware clipping but on many cards you get around
2634 * hardware clipping by writing to framebuffer directly like we are
2637 x2 = image->dx + image->width;
2638 y2 = image->dy + image->height;
2641 x2 = x2 < info->var.xres_virtual ? x2 : info->var.xres_virtual;
2642 y2 = y2 < info->var.yres_virtual ? y2 : info->var.yres_virtual;
2646 if (image->depth == 1) {
2647 // used for font data
2648 dst = (unsigned long *)
2649 ((unsigned long)info->screen_base & ~(BYTES_PER_LONG - 1));
2650 dst_idx = ((unsigned long)info->screen_base & (BYTES_PER_LONG - 1)) * 8;
2651 dst_idx += dy * par->next_line * 8 + dx;
2653 pitch = (image->width + 7) / 8;
2656 if (info->var.bits_per_pixel == 1)
2657 atafb_mfb_linefill(info, par->next_line,
2659 image->bg_color, image->fg_color);
2660 else if (info->var.bits_per_pixel == 2)
2661 atafb_iplan2p2_linefill(info, par->next_line,
2663 image->bg_color, image->fg_color);
2664 else if (info->var.bits_per_pixel == 4)
2665 atafb_iplan2p4_linefill(info, par->next_line,
2667 image->bg_color, image->fg_color);
2669 atafb_iplan2p8_linefill(info, par->next_line,
2671 image->bg_color, image->fg_color);
2676 // only used for logo; broken
2677 c2p(info->screen_base, image->data, dx, dy, width, height,
2678 par->next_line, par->next_plane, image->width,
2679 info->var.bits_per_pixel);
2684 atafb_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
2687 #ifdef FBCMD_GET_CURRENTPAR
2688 case FBCMD_GET_CURRENTPAR:
2689 if (copy_to_user((void *)arg, (void *)¤t_par,
2690 sizeof(struct atafb_par)))
2694 #ifdef FBCMD_SET_CURRENTPAR
2695 case FBCMD_SET_CURRENTPAR:
2696 if (copy_from_user((void *)¤t_par, (void *)arg,
2697 sizeof(struct atafb_par)))
2699 ata_set_par(¤t_par);
2706 /* (un)blank/poweroff
2713 static int atafb_blank(int blank, struct fb_info *info)
2715 unsigned short black[16];
2716 struct fb_cmap cmap;
2717 if (fbhw->blank && !fbhw->blank(blank))
2720 memset(black, 0, 16 * sizeof(unsigned short));
2727 fb_set_cmap(&cmap, info);
2731 do_install_cmap(info);
2737 * New fbcon interface ...
2740 /* check var by decoding var into hw par, rounding if necessary,
2741 * then encoding hw par back into new, validated var */
2742 static int atafb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
2745 struct atafb_par par;
2747 /* Validate wanted screen parameters */
2748 // if ((err = ata_decode_var(var, &par)))
2749 err = fbhw->decode_var(var, &par);
2753 /* Encode (possibly rounded) screen parameters */
2754 fbhw->encode_var(var, &par);
2758 /* actually set hw par by decoding var, then setting hardware from
2759 * hw par just decoded */
2760 static int atafb_set_par(struct fb_info *info)
2762 struct atafb_par *par = (struct atafb_par *)info->par;
2764 /* Decode wanted screen parameters */
2765 fbhw->decode_var(&info->var, par);
2766 fbhw->encode_fix(&info->fix, par);
2768 /* Set new videomode */
2775 static struct fb_ops atafb_ops = {
2776 .owner = THIS_MODULE,
2777 .fb_check_var = atafb_check_var,
2778 .fb_set_par = atafb_set_par,
2779 .fb_setcolreg = atafb_setcolreg,
2780 .fb_blank = atafb_blank,
2781 .fb_pan_display = atafb_pan_display,
2782 .fb_fillrect = atafb_fillrect,
2783 .fb_copyarea = atafb_copyarea,
2784 .fb_imageblit = atafb_imageblit,
2785 .fb_ioctl = atafb_ioctl,
2788 static void check_default_par(int detected_mode)
2790 char default_name[10];
2792 struct fb_var_screeninfo var;
2793 unsigned long min_mem;
2795 /* First try the user supplied mode */
2797 var = atafb_predefined[default_par - 1];
2798 var.activate = FB_ACTIVATE_TEST;
2799 if (do_fb_set_var(&var, 1))
2800 default_par = 0; /* failed */
2802 /* Next is the autodetected one */
2804 var = atafb_predefined[detected_mode - 1]; /* autodetect */
2805 var.activate = FB_ACTIVATE_TEST;
2806 if (!do_fb_set_var(&var, 1))
2807 default_par = detected_mode;
2809 /* If that also failed, try some default modes... */
2811 /* try default1, default2... */
2812 for (i = 1; i < 10; i++) {
2813 sprintf(default_name,"default%d", i);
2814 default_par = get_video_mode(default_name);
2816 panic("can't set default video mode");
2817 var = atafb_predefined[default_par - 1];
2818 var.activate = FB_ACTIVATE_TEST;
2819 if (!do_fb_set_var(&var,1))
2823 min_mem = var.xres_virtual * var.yres_virtual * var.bits_per_pixel / 8;
2824 if (default_mem_req < min_mem)
2825 default_mem_req = min_mem;
2829 static void __init atafb_setup_ext(char *spec)
2831 int xres, xres_virtual, yres, depth, planes;
2832 unsigned long addr, len;
2835 /* Format is: <xres>;<yres>;<depth>;<plane organ.>;
2837 * [;<screen mem length>[;<vgaiobase>[;<bits-per-col>[;<colorreg-type>
2838 * [;<xres-virtual>]]]]]
2841 * <xres_virtual>: hardware's x-resolution (f.e. ProMST)
2843 * Even xres_virtual is available, we neither support panning nor hw-scrolling!
2845 p = strsep(&spec, ";");
2848 xres_virtual = xres = simple_strtoul(p, NULL, 10);
2852 p = strsep(&spec, ";");
2855 yres = simple_strtoul(p, NULL, 10);
2859 p = strsep(&spec, ";");
2862 depth = simple_strtoul(p, NULL, 10);
2863 if (depth != 1 && depth != 2 && depth != 4 && depth != 8 &&
2864 depth != 16 && depth != 24)
2867 p = strsep(&spec, ";");
2871 planes = FB_TYPE_INTERLEAVED_PLANES;
2873 planes = FB_TYPE_PACKED_PIXELS;
2875 planes = FB_TYPE_PLANES;
2877 planes = -1; /* true color */
2881 p = strsep(&spec, ";");
2884 addr = simple_strtoul(p, NULL, 0);
2886 p = strsep(&spec, ";");
2888 len = xres * yres * depth / 8;
2890 len = simple_strtoul(p, NULL, 0);
2892 p = strsep(&spec, ";");
2894 external_vgaiobase = simple_strtoul(p, NULL, 0);
2896 p = strsep(&spec, ";");
2898 external_bitspercol = simple_strtoul(p, NULL, 0);
2899 if (external_bitspercol > 8)
2900 external_bitspercol = 8;
2901 else if (external_bitspercol < 1)
2902 external_bitspercol = 1;
2905 p = strsep(&spec, ";");
2907 if (!strcmp(p, "vga"))
2908 external_card_type = IS_VGA;
2909 if (!strcmp(p, "mv300"))
2910 external_card_type = IS_MV300;
2913 p = strsep(&spec, ";");
2915 xres_virtual = simple_strtoul(p, NULL, 10);
2916 if (xres_virtual < xres)
2917 xres_virtual = xres;
2918 if (xres_virtual * yres * depth / 8 > len)
2919 len = xres_virtual * yres * depth / 8;
2922 external_xres = xres;
2923 external_xres_virtual = xres_virtual;
2924 external_yres = yres;
2925 external_depth = depth;
2926 external_pmode = planes;
2927 external_addr = (void *)addr;
2930 if (external_card_type == IS_MV300) {
2931 switch (external_depth) {
2933 MV300_reg = MV300_reg_1bit;
2936 MV300_reg = MV300_reg_4bit;
2939 MV300_reg = MV300_reg_8bit;
2944 #endif /* ATAFB_EXT */
2946 static void __init atafb_setup_int(char *spec)
2948 /* Format to config extended internal video hardware like OverScan:
2949 * "internal:<xres>;<yres>;<xres_max>;<yres_max>;<offset>"
2951 * <xres>: x-resolution
2952 * <yres>: y-resolution
2953 * The following are only needed if you have an overscan which
2954 * needs a black border:
2955 * <xres_max>: max. length of a line in pixels your OverScan hardware would allow
2956 * <yres_max>: max. number of lines your OverScan hardware would allow
2957 * <offset>: Offset from physical beginning to visible beginning
2958 * of screen in bytes
2963 if (!(p = strsep(&spec, ";")) || !*p)
2965 xres = simple_strtoul(p, NULL, 10);
2966 if (!(p = strsep(&spec, ";")) || !*p)
2969 tt_yres = st_yres = simple_strtoul(p, NULL, 10);
2970 if ((p = strsep(&spec, ";")) && *p)
2971 sttt_xres_virtual = simple_strtoul(p, NULL, 10);
2972 if ((p = strsep(&spec, ";")) && *p)
2973 sttt_yres_virtual = simple_strtoul(p, NULL, 0);
2974 if ((p = strsep(&spec, ";")) && *p)
2975 ovsc_offset = simple_strtoul(p, NULL, 0);
2977 if (ovsc_offset || (sttt_yres_virtual != st_yres))
2982 static void __init atafb_setup_mcap(char *spec)
2985 int vmin, vmax, hmin, hmax;
2987 /* Format for monitor capabilities is: <Vmin>;<Vmax>;<Hmin>;<Hmax>
2988 * <V*> vertical freq. in Hz
2989 * <H*> horizontal freq. in kHz
2991 if (!(p = strsep(&spec, ";")) || !*p)
2993 vmin = simple_strtoul(p, NULL, 10);
2996 if (!(p = strsep(&spec, ";")) || !*p)
2998 vmax = simple_strtoul(p, NULL, 10);
2999 if (vmax <= 0 || vmax <= vmin)
3001 if (!(p = strsep(&spec, ";")) || !*p)
3003 hmin = 1000 * simple_strtoul(p, NULL, 10);
3006 if (!(p = strsep(&spec, "")) || !*p)
3008 hmax = 1000 * simple_strtoul(p, NULL, 10);
3009 if (hmax <= 0 || hmax <= hmin)
3012 fb_info.monspecs.vfmin = vmin;
3013 fb_info.monspecs.vfmax = vmax;
3014 fb_info.monspecs.hfmin = hmin;
3015 fb_info.monspecs.hfmax = hmax;
3017 #endif /* ATAFB_FALCON */
3019 static void __init atafb_setup_user(char *spec)
3021 /* Format of user defined video mode is: <xres>;<yres>;<depth>
3024 int xres, yres, depth, temp;
3026 p = strsep(&spec, ";");
3029 xres = simple_strtoul(p, NULL, 10);
3030 p = strsep(&spec, ";");
3033 yres = simple_strtoul(p, NULL, 10);
3034 p = strsep(&spec, "");
3037 depth = simple_strtoul(p, NULL, 10);
3038 temp = get_video_mode("user0");
3041 atafb_predefined[default_par - 1].xres = xres;
3042 atafb_predefined[default_par - 1].yres = yres;
3043 atafb_predefined[default_par - 1].bits_per_pixel = depth;
3047 int __init atafb_setup(char *options)
3052 if (!options || !*options)
3055 while ((this_opt = strsep(&options, ",")) != NULL) {
3058 if ((temp = get_video_mode(this_opt))) {
3060 mode_option = this_opt;
3061 } else if (!strcmp(this_opt, "inverse"))
3063 else if (!strncmp(this_opt, "hwscroll_", 9)) {
3064 hwscroll = simple_strtoul(this_opt + 9, NULL, 10);
3071 else if (!strcmp(this_opt, "mv300")) {
3072 external_bitspercol = 8;
3073 external_card_type = IS_MV300;
3074 } else if (!strncmp(this_opt, "external:", 9))
3075 atafb_setup_ext(this_opt + 9);
3077 else if (!strncmp(this_opt, "internal:", 9))
3078 atafb_setup_int(this_opt + 9);
3080 else if (!strncmp(this_opt, "eclock:", 7)) {
3081 fext.f = simple_strtoul(this_opt + 7, NULL, 10);
3082 /* external pixelclock in kHz --> ps */
3083 fext.t = 1000000000 / fext.f;
3085 } else if (!strncmp(this_opt, "monitorcap:", 11))
3086 atafb_setup_mcap(this_opt + 11);
3088 else if (!strcmp(this_opt, "keep"))
3090 else if (!strncmp(this_opt, "R", 1))
3091 atafb_setup_user(this_opt + 1);
3096 int __init atafb_init(void)
3100 unsigned int defmode = 0;
3101 unsigned long mem_req;
3104 char *option = NULL;
3106 if (fb_get_options("atafb", &option))
3108 atafb_setup(option);
3110 printk("atafb_init: start\n");
3117 if (external_addr) {
3118 printk("atafb_init: initializing external hw\n");
3120 atafb_ops.fb_setcolreg = &ext_setcolreg;
3121 defmode = DEFMODE_EXT;
3126 if (ATARIHW_PRESENT(TT_SHIFTER)) {
3127 printk("atafb_init: initializing TT hw\n");
3129 atafb_ops.fb_setcolreg = &tt_setcolreg;
3130 defmode = DEFMODE_TT;
3135 if (ATARIHW_PRESENT(VIDEL_SHIFTER)) {
3136 printk("atafb_init: initializing Falcon hw\n");
3137 fbhw = &falcon_switch;
3138 atafb_ops.fb_setcolreg = &falcon_setcolreg;
3139 request_irq(IRQ_AUTO_4, falcon_vbl_switcher, IRQ_TYPE_PRIO,
3140 "framebuffer/modeswitch", falcon_vbl_switcher);
3141 defmode = DEFMODE_F30;
3146 if (ATARIHW_PRESENT(STND_SHIFTER) ||
3147 ATARIHW_PRESENT(EXTD_SHIFTER)) {
3148 printk("atafb_init: initializing ST/E hw\n");
3150 atafb_ops.fb_setcolreg = &stste_setcolreg;
3151 defmode = DEFMODE_STE;
3155 atafb_ops.fb_setcolreg = &stste_setcolreg;
3156 printk("Cannot determine video hardware; defaulting to ST(e)\n");
3157 #else /* ATAFB_STE */
3158 /* no default driver included */
3159 /* Nobody will ever see this message :-) */
3160 panic("Cannot initialize video hardware");
3164 /* Multisync monitor capabilities */
3165 /* Atari-TOS defaults if no boot option present */
3166 if (fb_info.monspecs.hfmin == 0) {
3167 fb_info.monspecs.hfmin = 31000;
3168 fb_info.monspecs.hfmax = 32000;
3169 fb_info.monspecs.vfmin = 58;
3170 fb_info.monspecs.vfmax = 62;
3173 detected_mode = fbhw->detect();
3174 check_default_par(detected_mode);
3176 if (!external_addr) {
3177 #endif /* ATAFB_EXT */
3178 mem_req = default_mem_req + ovsc_offset + ovsc_addlen;
3179 mem_req = PAGE_ALIGN(mem_req) + PAGE_SIZE;
3180 screen_base = atari_stram_alloc(mem_req, "atafb");
3182 panic("Cannot allocate screen memory");
3183 memset(screen_base, 0, mem_req);
3184 pad = -(unsigned long)screen_base & (PAGE_SIZE - 1);
3186 real_screen_base = screen_base + ovsc_offset;
3187 screen_len = (mem_req - pad - ovsc_offset) & PAGE_MASK;
3189 if (CPU_IS_040_OR_060) {
3190 /* On a '040+, the cache mode of video RAM must be set to
3191 * write-through also for internal video hardware! */
3192 cache_push(virt_to_phys(screen_base), screen_len);
3193 kernel_set_cachemode(screen_base, screen_len,
3194 IOMAP_WRITETHROUGH);
3196 printk("atafb: screen_base %p real_screen_base %p screen_len %d\n",
3197 screen_base, real_screen_base, screen_len);
3200 /* Map the video memory (physical address given) to somewhere
3201 * in the kernel address space.
3203 external_addr = ioremap_writethrough((unsigned long)external_addr,
3205 if (external_vgaiobase)
3206 external_vgaiobase =
3207 (unsigned long)ioremap(external_vgaiobase, 0x10000);
3209 real_screen_base = external_addr;
3210 screen_len = external_len & PAGE_MASK;
3211 memset (screen_base, 0, external_len);
3213 #endif /* ATAFB_EXT */
3215 // strcpy(fb_info.mode->name, "Atari Builtin ");
3216 fb_info.fbops = &atafb_ops;
3217 // try to set default (detected; requested) var
3218 do_fb_set_var(&atafb_predefined[default_par - 1], 1);
3219 // reads hw state into current par, which may not be sane yet
3220 ata_get_par(¤t_par);
3221 fb_info.par = ¤t_par;
3222 // tries to read from HW which may not be initialized yet
3223 // so set sane var first, then call atafb_set_par
3224 atafb_get_var(&fb_info.var, &fb_info);
3225 fb_info.flags = FBINFO_FLAG_DEFAULT;
3227 if (!fb_find_mode(&fb_info.var, &fb_info, mode_option, atafb_modedb,
3228 NUM_TOTAL_MODES, &atafb_modedb[defmode],
3229 fb_info.var.bits_per_pixel)) {
3233 fb_videomode_to_modelist(atafb_modedb, NUM_TOTAL_MODES,
3236 atafb_set_disp(&fb_info);
3238 fb_alloc_cmap(&(fb_info.cmap), 1 << fb_info.var.bits_per_pixel, 0);
3241 printk("Determined %dx%d, depth %d\n",
3242 fb_info.var.xres, fb_info.var.yres, fb_info.var.bits_per_pixel);
3243 if ((fb_info.var.xres != fb_info.var.xres_virtual) ||
3244 (fb_info.var.yres != fb_info.var.yres_virtual))
3245 printk(" virtual %dx%d\n", fb_info.var.xres_virtual,
3246 fb_info.var.yres_virtual);
3248 if (register_framebuffer(&fb_info) < 0) {
3250 if (external_addr) {
3251 iounmap(external_addr);
3252 external_addr = NULL;
3254 if (external_vgaiobase) {
3255 iounmap((void*)external_vgaiobase);
3256 external_vgaiobase = 0;
3262 // FIXME: mode needs setting!
3263 //printk("fb%d: %s frame buffer device, using %dK of video memory\n",
3264 // fb_info.node, fb_info.mode->name, screen_len>>10);
3265 printk("fb%d: frame buffer device, using %dK of video memory\n",
3266 fb_info.node, screen_len >> 10);
3268 /* TODO: This driver cannot be unloaded yet */
3272 module_init(atafb_init);
3275 MODULE_LICENSE("GPL");
3277 int cleanup_module(void)
3279 unregister_framebuffer(&fb_info);
3280 return atafb_deinit();