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fbdev: add mutex for fb_mmap locking
[linux-2.6/mini2440.git] / drivers / video / atafb.c
blob497ff8af03edf0aa70feeebaa210aaae2419e545
1 /*
2 * linux/drivers/video/atafb.c -- Atari builtin chipset frame buffer device
3 *
4 * Copyright (C) 1994 Martin Schaller & Roman Hodek
5 *
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
8 * for more details.
9 *
10 * History:
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
31 * supported.
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
38 *
39 * To do:
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.
42 *
43 */
44
45 #define ATAFB_TT
46 #define ATAFB_STE
47 #define ATAFB_EXT
48 #define ATAFB_FALCON
49
50 #include <linux/module.h>
51 #include <linux/kernel.h>
52 #include <linux/errno.h>
53 #include <linux/string.h>
54 #include <linux/mm.h>
55 #include <linux/slab.h>
56 #include <linux/delay.h>
57 #include <linux/init.h>
58 #include <linux/interrupt.h>
59
60 #include <asm/setup.h>
61 #include <linux/uaccess.h>
62 #include <asm/pgtable.h>
63 #include <asm/irq.h>
64 #include <asm/io.h>
65
66 #include <asm/atarihw.h>
67 #include <asm/atariints.h>
68 #include <asm/atari_stram.h>
69
70 #include <linux/fb.h>
71 #include <asm/atarikb.h>
72
73 #include "c2p.h"
74 #include "atafb.h"
75
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
80
81
82 #define up(x, r) (((x) + (r) - 1) & ~((r)-1))
83
84 /*
85 * Interface to the world
86 */
87
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,
102 unsigned long arg);
103
104
105 static int default_par; /* default resolution (0=none) */
106
107 static unsigned long default_mem_req;
108
109 static int hwscroll = -1;
110
111 static int use_hwscroll = 1;
112
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;
116
117 /*
118 * Hardware parameters for current mode
119 */
120
121 static struct atafb_par {
122 void *screen_base;
123 int yres_virtual;
124 u_long next_line;
125 #if defined ATAFB_TT || defined ATAFB_STE
126 union {
127 struct {
128 int mode;
129 int sync;
130 } tt, st;
131 #endif
132 #ifdef ATAFB_FALCON
133 struct falcon_hw {
134 /* Here are fields for storing a video mode, as direct
135 * parameters for the hardware.
136 */
137 short sync;
138 short line_width;
139 short line_offset;
140 short st_shift;
141 short f_shift;
142 short vid_control;
143 short vid_mode;
144 short xoffset;
145 short hht, hbb, hbe, hdb, hde, hss;
146 short vft, vbb, vbe, vdb, vde, vss;
147 /* auxiliary information */
148 short mono;
149 short ste_mode;
150 short bpp;
151 u32 pseudo_palette[16];
152 } falcon;
153 #endif
154 /* Nothing needed for external mode */
155 } hw;
156 } current_par;
157
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;
162
163 #ifdef ATAFB_FALCON
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
184 #endif
185
186 static struct fb_info fb_info = {
187 .fix = {
188 .id = "Atari ",
189 .visual = FB_VISUAL_PSEUDOCOLOR,
190 .accel = FB_ACCEL_NONE,
191 }
192 };
193
194 static void *screen_base; /* base address of screen */
195 static void *real_screen_base; /* (only for Overscan) */
196
197 static int screen_len;
198
199 static int current_par_valid;
200
201 static int mono_moni;
202
203
204 #ifdef ATAFB_EXT
205
206 /* external video handling */
207 static unsigned int external_xres;
208 static unsigned int external_xres_virtual;
209 static unsigned int external_yres;
210
211 /*
212 * not needed - atafb will never support panning/hardwarescroll with external
213 * static unsigned int external_yres_virtual;
214 */
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;
221
222 /*
223 * JOE <joe@amber.dinoco.de>:
224 * added card type for external driver, is only needed for
225 * colormap handling.
226 */
227 enum cardtype { IS_VGA, IS_MV300 };
228 static enum cardtype external_card_type = IS_VGA;
229
230 /*
231 * The MV300 mixes the color registers. So we need an array of munged
232 * indices in order to access the correct reg.
233 */
234 static int MV300_reg_1bit[2] = {
235 0, 1
236 };
237 static int MV300_reg_4bit[16] = {
238 0, 8, 4, 12, 2, 10, 6, 14, 1, 9, 5, 13, 3, 11, 7, 15
239 };
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
257 };
258
259 static int *MV300_reg = MV300_reg_8bit;
260 #endif /* ATAFB_EXT */
261
262
263 static int inverse;
264
265 extern int fontheight_8x8;
266 extern int fontwidth_8x8;
267 extern unsigned char fontdata_8x8[];
268
269 extern int fontheight_8x16;
270 extern int fontwidth_8x16;
271 extern unsigned char fontdata_8x16[];
272
273 /*
274 * struct fb_ops {
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);
279 *
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);
284 *
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);
288 *
289 * * set the video mode according to info->var *
290 * int (*fb_set_par)(struct fb_info *info);
291 *
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);
295 *
296 * * set color registers in batch *
297 * int (*fb_setcmap)(struct fb_cmap *cmap, struct fb_info *info);
298 *
299 * * blank display *
300 * int (*fb_blank)(int blank, struct fb_info *info);
301 *
302 * * pan display *
303 * int (*fb_pan_display)(struct fb_var_screeninfo *var, struct fb_info *info);
304 *
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);
312 *
313 * * Draws cursor *
314 * int (*fb_cursor) (struct fb_info *info, struct fb_cursor *cursor);
315 *
316 * * Rotates the display *
317 * void (*fb_rotate)(struct fb_info *info, int angle);
318 *
319 * * wait for blit idle, optional *
320 * int (*fb_sync)(struct fb_info *info);
321 *
322 * * perform fb specific ioctl (optional) *
323 * int (*fb_ioctl)(struct fb_info *info, unsigned int cmd,
324 * unsigned long arg);
325 *
326 * * Handle 32bit compat ioctl (optional) *
327 * int (*fb_compat_ioctl)(struct fb_info *info, unsigned int cmd,
328 * unsigned long arg);
329 *
330 * * perform fb specific mmap *
331 * int (*fb_mmap)(struct fb_info *info, struct vm_area_struct *vma);
332 *
333 * * save current hardware state *
334 * void (*fb_save_state)(struct fb_info *info);
335 *
336 * * restore saved state *
337 * void (*fb_restore_state)(struct fb_info *info);
338 * } ;
339 */
340
341
342 /* ++roman: This structure abstracts from the underlying hardware (ST(e),
343 * TT, or Falcon.
344 *
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.
350 *
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 !!!
356 *
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.
364 *
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.
369 *
370 * void (*get_par)(struct atafb_par *par)
371 * Fill the hardware's 'par' structure.
372 * !!! Used only by detect() !!!
373 *
374 * void (*set_par)(struct atafb_par *par)
375 * Set the hardware according to 'par'.
376 *
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.
380 *
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.
388 */
389
390 static struct fb_hwswitch {
391 int (*detect)(void);
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);
404 } *fbhw;
405
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 };
419
420 static char **fb_var_names[] = {
421 autodetect_names,
422 stlow_names,
423 stmid_names,
424 sthigh_names,
425 ttlow_names,
426 ttmid_names,
427 tthigh_names,
428 vga2_names,
429 vga4_names,
430 vga16_names,
431 vga256_names,
432 falh2_names,
433 falh16_names,
434 NULL
435 };
436
437 static struct fb_var_screeninfo atafb_predefined[] = {
438 /*
439 * yres_virtual == 0 means use hw-scrolling if possible, else yres
440 */
441 { /* autodetect */
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 },
445 { /* st low */
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 },
449 { /* st mid */
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 },
453 { /* st high */
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 },
457 { /* tt low */
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 },
461 { /* tt mid */
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 },
465 { /* tt high */
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 },
469 { /* vga2 */
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 },
473 { /* vga4 */
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 },
477 { /* vga16 */
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 },
481 { /* vga256 */
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 },
485 { /* falh2 */
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 },
489 { /* falh16 */
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 },
493 };
494
495 static int num_atafb_predefined = ARRAY_SIZE(atafb_predefined);
496
497 static struct fb_videomode atafb_modedb[] __initdata = {
498 /*
499 * Atari Video Modes
500 *
501 * If you change these, make sure to update DEFMODE_* as well!
502 */
503
504 /*
505 * ST/TT Video Modes
506 */
507
508 {
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
512 }, {
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
516 }, {
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
520 }, {
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
524 }, {
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
528 }, {
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
532 },
533
534 /*
535 * VGA Video Modes
536 */
537
538 {
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
542 }, {
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
546 },
547
548 /*
549 * Falcon HiRes Video Modes
550 */
551
552 {
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
556 },
557 };
558
559 #define NUM_TOTAL_MODES ARRAY_SIZE(atafb_modedb)
560
561 static char *mode_option __initdata = NULL;
562
563 /* default modes */
564
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 */
569
570
571 static int get_video_mode(char *vname)
572 {
573 char ***name_list;
574 char **name;
575 int i;
576
577 name_list = fb_var_names;
578 for (i = 0; i < num_atafb_predefined; i++) {
579 name = *name_list++;
580 if (!name || !*name)
581 break;
582 while (*name) {
583 if (!strcmp(vname, *name))
584 return i + 1;
585 name++;
586 }
587 }
588 return 0;
589 }
590
591
592
593 /* ------------------- TT specific functions ---------------------- */
594
595 #ifdef ATAFB_TT
596
597 static int tt_encode_fix(struct fb_fix_screeninfo *fix, struct atafb_par *par)
598 {
599 int mode;
600
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;
605 fix->type_aux = 2;
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;
610 fix->type_aux = 0;
611 if (mode == TT_SHIFTER_TTHIGH)
612 fix->visual = FB_VISUAL_MONO01;
613 }
614 fix->xpanstep = 0;
615 fix->ypanstep = 1;
616 fix->ywrapstep = 0;
617 fix->line_length = par->next_line;
618 fix->accel = FB_ACCEL_ATARIBLITT;
619 return 0;
620 }
621
622 static int tt_decode_var(struct fb_var_screeninfo *var, struct atafb_par *par)
623 {
624 int xres = var->xres;
625 int yres = var->yres;
626 int bpp = var->bits_per_pixel;
627 int linelen;
628 int yres_virtual = var->yres_virtual;
629
630 if (mono_moni) {
631 if (bpp > 1 || xres > sttt_xres * 2 || yres > tt_yres * 2)
632 return -EINVAL;
633 par->hw.tt.mode = TT_SHIFTER_TTHIGH;
634 xres = sttt_xres * 2;
635 yres = tt_yres * 2;
636 bpp = 1;
637 } else {
638 if (bpp > 8 || xres > sttt_xres || yres > tt_yres)
639 return -EINVAL;
640 if (bpp > 4) {
641 if (xres > sttt_xres / 2 || yres > tt_yres)
642 return -EINVAL;
643 par->hw.tt.mode = TT_SHIFTER_TTLOW;
644 xres = sttt_xres / 2;
645 yres = tt_yres;
646 bpp = 8;
647 } else if (bpp > 2) {
648 if (xres > sttt_xres || yres > tt_yres)
649 return -EINVAL;
650 if (xres > sttt_xres / 2 || yres > st_yres / 2) {
651 par->hw.tt.mode = TT_SHIFTER_TTMID;
652 xres = sttt_xres;
653 yres = tt_yres;
654 bpp = 4;
655 } else {
656 par->hw.tt.mode = TT_SHIFTER_STLOW;
657 xres = sttt_xres / 2;
658 yres = st_yres / 2;
659 bpp = 4;
660 }
661 } else if (bpp > 1) {
662 if (xres > sttt_xres || yres > st_yres / 2)
663 return -EINVAL;
664 par->hw.tt.mode = TT_SHIFTER_STMID;
665 xres = sttt_xres;
666 yres = st_yres / 2;
667 bpp = 2;
668 } else if (var->xres > sttt_xres || var->yres > st_yres) {
669 return -EINVAL;
670 } else {
671 par->hw.tt.mode = TT_SHIFTER_STHIGH;
672 xres = sttt_xres;
673 yres = st_yres;
674 bpp = 1;
675 }
676 }
677 if (yres_virtual <= 0)
678 yres_virtual = 0;
679 else if (yres_virtual < yres)
680 yres_virtual = yres;
681 if (var->sync & FB_SYNC_EXT)
682 par->hw.tt.sync = 0;
683 else
684 par->hw.tt.sync = 1;
685 linelen = xres * bpp / 8;
686 if (yres_virtual * linelen > screen_len && screen_len)
687 return -EINVAL;
688 if (yres * linelen > screen_len && screen_len)
689 return -EINVAL;
690 if (var->yoffset + yres > yres_virtual && yres_virtual)
691 return -EINVAL;
692 par->yres_virtual = yres_virtual;
693 par->screen_base = screen_base + var->yoffset * linelen;
694 par->next_line = linelen;
695 return 0;
696 }
697
698 static int tt_encode_var(struct fb_var_screeninfo *var, struct atafb_par *par)
699 {
700 int linelen;
701 memset(var, 0, sizeof(struct fb_var_screeninfo));
702 var->red.offset = 0;
703 var->red.length = 4;
704 var->red.msb_right = 0;
705 var->grayscale = 0;
706
707 var->pixclock = 31041;
708 var->left_margin = 120; /* these may be incorrect */
709 var->right_margin = 100;
710 var->upper_margin = 8;
711 var->lower_margin = 16;
712 var->hsync_len = 140;
713 var->vsync_len = 30;
714
715 var->height = -1;
716 var->width = -1;
717
718 if (par->hw.tt.sync & 1)
719 var->sync = 0;
720 else
721 var->sync = FB_SYNC_EXT;
722
723 switch (par->hw.tt.mode & TT_SHIFTER_MODEMASK) {
724 case TT_SHIFTER_STLOW:
725 var->xres = sttt_xres / 2;
726 var->xres_virtual = sttt_xres_virtual / 2;
727 var->yres = st_yres / 2;
728 var->bits_per_pixel = 4;
729 break;
730 case TT_SHIFTER_STMID:
731 var->xres = sttt_xres;
732 var->xres_virtual = sttt_xres_virtual;
733 var->yres = st_yres / 2;
734 var->bits_per_pixel = 2;
735 break;
736 case TT_SHIFTER_STHIGH:
737 var->xres = sttt_xres;
738 var->xres_virtual = sttt_xres_virtual;
739 var->yres = st_yres;
740 var->bits_per_pixel = 1;
741 break;
742 case TT_SHIFTER_TTLOW:
743 var->xres = sttt_xres / 2;
744 var->xres_virtual = sttt_xres_virtual / 2;
745 var->yres = tt_yres;
746 var->bits_per_pixel = 8;
747 break;
748 case TT_SHIFTER_TTMID:
749 var->xres = sttt_xres;
750 var->xres_virtual = sttt_xres_virtual;
751 var->yres = tt_yres;
752 var->bits_per_pixel = 4;
753 break;
754 case TT_SHIFTER_TTHIGH:
755 var->red.length = 0;
756 var->xres = sttt_xres * 2;
757 var->xres_virtual = sttt_xres_virtual * 2;
758 var->yres = tt_yres * 2;
759 var->bits_per_pixel = 1;
760 break;
761 }
762 var->blue = var->green = var->red;
763 var->transp.offset = 0;
764 var->transp.length = 0;
765 var->transp.msb_right = 0;
766 linelen = var->xres_virtual * var->bits_per_pixel / 8;
767 if (!use_hwscroll)
768 var->yres_virtual = var->yres;
769 else if (screen_len) {
770 if (par->yres_virtual)
771 var->yres_virtual = par->yres_virtual;
772 else
773 /* yres_virtual == 0 means use maximum */
774 var->yres_virtual = screen_len / linelen;
775 } else {
776 if (hwscroll < 0)
777 var->yres_virtual = 2 * var->yres;
778 else
779 var->yres_virtual = var->yres + hwscroll * 16;
780 }
781 var->xoffset = 0;
782 if (screen_base)
783 var->yoffset = (par->screen_base - screen_base) / linelen;
784 else
785 var->yoffset = 0;
786 var->nonstd = 0;
787 var->activate = 0;
788 var->vmode = FB_VMODE_NONINTERLACED;
789 return 0;
790 }
791
792 static void tt_get_par(struct atafb_par *par)
793 {
794 unsigned long addr;
795 par->hw.tt.mode = shifter_tt.tt_shiftmode;
796 par->hw.tt.sync = shifter.syncmode;
797 addr = ((shifter.bas_hi & 0xff) << 16) |
798 ((shifter.bas_md & 0xff) << 8) |
799 ((shifter.bas_lo & 0xff));
800 par->screen_base = phys_to_virt(addr);
801 }
802
803 static void tt_set_par(struct atafb_par *par)
804 {
805 shifter_tt.tt_shiftmode = par->hw.tt.mode;
806 shifter.syncmode = par->hw.tt.sync;
807 /* only set screen_base if really necessary */
808 if (current_par.screen_base != par->screen_base)
809 fbhw->set_screen_base(par->screen_base);
810 }
811
812 static int tt_setcolreg(unsigned int regno, unsigned int red,
813 unsigned int green, unsigned int blue,
814 unsigned int transp, struct fb_info *info)
815 {
816 if ((shifter_tt.tt_shiftmode & TT_SHIFTER_MODEMASK) == TT_SHIFTER_STHIGH)
817 regno += 254;
818 if (regno > 255)
819 return 1;
820 tt_palette[regno] = (((red >> 12) << 8) | ((green >> 12) << 4) |
821 (blue >> 12));
822 if ((shifter_tt.tt_shiftmode & TT_SHIFTER_MODEMASK) ==
823 TT_SHIFTER_STHIGH && regno == 254)
824 tt_palette[0] = 0;
825 return 0;
826 }
827
828 static int tt_detect(void)
829 {
830 struct atafb_par par;
831
832 /* Determine the connected monitor: The DMA sound must be
833 * disabled before reading the MFP GPIP, because the Sound
834 * Done Signal and the Monochrome Detect are XORed together!
835 *
836 * Even on a TT, we should look if there is a DMA sound. It was
837 * announced that the Eagle is TT compatible, but only the PCM is
838 * missing...
839 */
840 if (ATARIHW_PRESENT(PCM_8BIT)) {
841 tt_dmasnd.ctrl = DMASND_CTRL_OFF;
842 udelay(20); /* wait a while for things to settle down */
843 }
844 mono_moni = (st_mfp.par_dt_reg & 0x80) == 0;
845
846 tt_get_par(&par);
847 tt_encode_var(&atafb_predefined[0], &par);
848
849 return 1;
850 }
851
852 #endif /* ATAFB_TT */
853
854 /* ------------------- Falcon specific functions ---------------------- */
855
856 #ifdef ATAFB_FALCON
857
858 static int mon_type; /* Falcon connected monitor */
859 static int f030_bus_width; /* Falcon ram bus width (for vid_control) */
860 #define F_MON_SM 0
861 #define F_MON_SC 1
862 #define F_MON_VGA 2
863 #define F_MON_TV 3
864
865 static struct pixel_clock {
866 unsigned long f; /* f/[Hz] */
867 unsigned long t; /* t/[ps] (=1/f) */
868 int right, hsync, left; /* standard timing in clock cycles, not pixel */
869 /* hsync initialized in falcon_detect() */
870 int sync_mask; /* or-mask for hw.falcon.sync to set this clock */
871 int control_mask; /* ditto, for hw.falcon.vid_control */
872 } f25 = {
873 25175000, 39721, 18, 0, 42, 0x0, VCO_CLOCK25
874 }, f32 = {
875 32000000, 31250, 18, 0, 42, 0x0, 0
876 }, fext = {
877 0, 0, 18, 0, 42, 0x1, 0
878 };
879
880 /* VIDEL-prescale values [mon_type][pixel_length from VCO] */
881 static int vdl_prescale[4][3] = {
882 { 4,2,1 }, { 4,2,1 }, { 4,2,2 }, { 4,2,1 }
883 };
884
885 /* Default hsync timing [mon_type] in picoseconds */
886 static long h_syncs[4] = { 3000000, 4875000, 4000000, 4875000 };
887
888 static inline int hxx_prescale(struct falcon_hw *hw)
889 {
890 return hw->ste_mode ? 16
891 : vdl_prescale[mon_type][hw->vid_mode >> 2 & 0x3];
892 }
893
894 static int falcon_encode_fix(struct fb_fix_screeninfo *fix,
895 struct atafb_par *par)
896 {
897 strcpy(fix->id, "Atari Builtin");
898 fix->smem_start = (unsigned long)real_screen_base;
899 fix->smem_len = screen_len;
900 fix->type = FB_TYPE_INTERLEAVED_PLANES;
901 fix->type_aux = 2;
902 fix->visual = FB_VISUAL_PSEUDOCOLOR;
903 fix->xpanstep = 1;
904 fix->ypanstep = 1;
905 fix->ywrapstep = 0;
906 if (par->hw.falcon.mono) {
907 fix->type = FB_TYPE_PACKED_PIXELS;
908 fix->type_aux = 0;
909 /* no smooth scrolling with longword aligned video mem */
910 fix->xpanstep = 32;
911 } else if (par->hw.falcon.f_shift & 0x100) {
912 fix->type = FB_TYPE_PACKED_PIXELS;
913 fix->type_aux = 0;
914 /* Is this ok or should it be DIRECTCOLOR? */
915 fix->visual = FB_VISUAL_TRUECOLOR;
916 fix->xpanstep = 2;
917 }
918 fix->line_length = par->next_line;
919 fix->accel = FB_ACCEL_ATARIBLITT;
920 return 0;
921 }
922
923 static int falcon_decode_var(struct fb_var_screeninfo *var,
924 struct atafb_par *par)
925 {
926 int bpp = var->bits_per_pixel;
927 int xres = var->xres;
928 int yres = var->yres;
929 int xres_virtual = var->xres_virtual;
930 int yres_virtual = var->yres_virtual;
931 int left_margin, right_margin, hsync_len;
932 int upper_margin, lower_margin, vsync_len;
933 int linelen;
934 int interlace = 0, doubleline = 0;
935 struct pixel_clock *pclock;
936 int plen; /* width of pixel in clock cycles */
937 int xstretch;
938 int prescale;
939 int longoffset = 0;
940 int hfreq, vfreq;
941 int hdb_off, hde_off, base_off;
942 int gstart, gend1, gend2, align;
943
944 /*
945 Get the video params out of 'var'. If a value doesn't fit, round
946 it up, if it's too big, return EINVAL.
947 Round up in the following order: bits_per_pixel, xres, yres,
948 xres_virtual, yres_virtual, xoffset, yoffset, grayscale, bitfields,
949 horizontal timing, vertical timing.
950
951 There is a maximum of screen resolution determined by pixelclock
952 and minimum frame rate -- (X+hmarg.)*(Y+vmarg.)*vfmin <= pixelclock.
953 In interlace mode this is " * " *vfmin <= pixelclock.
954 Additional constraints: hfreq.
955 Frequency range for multisync monitors is given via command line.
956 For TV and SM124 both frequencies are fixed.
957
958 X % 16 == 0 to fit 8x?? font (except 1 bitplane modes must use X%32 == 0)
959 Y % 16 == 0 to fit 8x16 font
960 Y % 8 == 0 if Y<400
961
962 Currently interlace and doubleline mode in var are ignored.
963 On SM124 and TV only the standard resolutions can be used.
964 */
965
966 /* Reject uninitialized mode */
967 if (!xres || !yres || !bpp)
968 return -EINVAL;
969
970 if (mon_type == F_MON_SM && bpp != 1)
971 return -EINVAL;
972
973 if (bpp <= 1) {
974 bpp = 1;
975 par->hw.falcon.f_shift = 0x400;
976 par->hw.falcon.st_shift = 0x200;
977 } else if (bpp <= 2) {
978 bpp = 2;
979 par->hw.falcon.f_shift = 0x000;
980 par->hw.falcon.st_shift = 0x100;
981 } else if (bpp <= 4) {
982 bpp = 4;
983 par->hw.falcon.f_shift = 0x000;
984 par->hw.falcon.st_shift = 0x000;
985 } else if (bpp <= 8) {
986 bpp = 8;
987 par->hw.falcon.f_shift = 0x010;
988 } else if (bpp <= 16) {
989 bpp = 16; /* packed pixel mode */
990 par->hw.falcon.f_shift = 0x100; /* hicolor, no overlay */
991 } else
992 return -EINVAL;
993 par->hw.falcon.bpp = bpp;
994
995 if (mon_type == F_MON_SM || DontCalcRes) {
996 /* Skip all calculations. VGA/TV/SC1224 only supported. */
997 struct fb_var_screeninfo *myvar = &atafb_predefined[0];
998
999 if (bpp > myvar->bits_per_pixel ||
1000 var->xres > myvar->xres ||
1001 var->yres > myvar->yres)
1002 return -EINVAL;
1003 fbhw->get_par(par); /* Current par will be new par */
1004 goto set_screen_base; /* Don't forget this */
1005 }
1006
1007 /* Only some fixed resolutions < 640x400 */
1008 if (xres <= 320)
1009 xres = 320;
1010 else if (xres <= 640 && bpp != 16)
1011 xres = 640;
1012 if (yres <= 200)
1013 yres = 200;
1014 else if (yres <= 240)
1015 yres = 240;
1016 else if (yres <= 400)
1017 yres = 400;
1018
1019 /* 2 planes must use STE compatibility mode */
1020 par->hw.falcon.ste_mode = bpp == 2;
1021 par->hw.falcon.mono = bpp == 1;
1022
1023 /* Total and visible scanline length must be a multiple of one longword,
1024 * this and the console fontwidth yields the alignment for xres and
1025 * xres_virtual.
1026 * TODO: this way "odd" fontheights are not supported
1027 *
1028 * Special case in STE mode: blank and graphic positions don't align,
1029 * avoid trash at right margin
1030 */
1031 if (par->hw.falcon.ste_mode)
1032 xres = (xres + 63) & ~63;
1033 else if (bpp == 1)
1034 xres = (xres + 31) & ~31;
1035 else
1036 xres = (xres + 15) & ~15;
1037 if (yres >= 400)
1038 yres = (yres + 15) & ~15;
1039 else
1040 yres = (yres + 7) & ~7;
1041
1042 if (xres_virtual < xres)
1043 xres_virtual = xres;
1044 else if (bpp == 1)
1045 xres_virtual = (xres_virtual + 31) & ~31;
1046 else
1047 xres_virtual = (xres_virtual + 15) & ~15;
1048
1049 if (yres_virtual <= 0)
1050 yres_virtual = 0;
1051 else if (yres_virtual < yres)
1052 yres_virtual = yres;
1053
1054 /* backward bug-compatibility */
1055 if (var->pixclock > 1)
1056 var->pixclock -= 1;
1057
1058 par->hw.falcon.line_width = bpp * xres / 16;
1059 par->hw.falcon.line_offset = bpp * (xres_virtual - xres) / 16;
1060
1061 /* single or double pixel width */
1062 xstretch = (xres < 640) ? 2 : 1;
1063
1064 #if 0 /* SM124 supports only 640x400, this is rejected above */
1065 if (mon_type == F_MON_SM) {
1066 if (xres != 640 && yres != 400)
1067 return -EINVAL;
1068 plen = 1;
1069 pclock = &f32;
1070 /* SM124-mode is special */
1071 par->hw.falcon.ste_mode = 1;
1072 par->hw.falcon.f_shift = 0x000;
1073 par->hw.falcon.st_shift = 0x200;
1074 left_margin = hsync_len = 128 / plen;
1075 right_margin = 0;
1076 /* TODO set all margins */
1077 } else
1078 #endif
1079 if (mon_type == F_MON_SC || mon_type == F_MON_TV) {
1080 plen = 2 * xstretch;
1081 if (var->pixclock > f32.t * plen)
1082 return -EINVAL;
1083 pclock = &f32;
1084 if (yres > 240)
1085 interlace = 1;
1086 if (var->pixclock == 0) {
1087 /* set some minimal margins which center the screen */
1088 left_margin = 32;
1089 right_margin = 18;
1090 hsync_len = pclock->hsync / plen;
1091 upper_margin = 31;
1092 lower_margin = 14;
1093 vsync_len = interlace ? 3 : 4;
1094 } else {
1095 left_margin = var->left_margin;
1096 right_margin = var->right_margin;
1097 hsync_len = var->hsync_len;
1098 upper_margin = var->upper_margin;
1099 lower_margin = var->lower_margin;
1100 vsync_len = var->vsync_len;
1101 if (var->vmode & FB_VMODE_INTERLACED) {
1102 upper_margin = (upper_margin + 1) / 2;
1103 lower_margin = (lower_margin + 1) / 2;
1104 vsync_len = (vsync_len + 1) / 2;
1105 } else if (var->vmode & FB_VMODE_DOUBLE) {
1106 upper_margin *= 2;
1107 lower_margin *= 2;
1108 vsync_len *= 2;
1109 }
1110 }
1111 } else { /* F_MON_VGA */
1112 if (bpp == 16)
1113 xstretch = 2; /* Double pixel width only for hicolor */
1114 /* Default values are used for vert./hor. timing if no pixelclock given. */
1115 if (var->pixclock == 0) {
1116 int linesize;
1117
1118 /* Choose master pixelclock depending on hor. timing */
1119 plen = 1 * xstretch;
1120 if ((plen * xres + f25.right + f25.hsync + f25.left) *
1121 fb_info.monspecs.hfmin < f25.f)
1122 pclock = &f25;
1123 else if ((plen * xres + f32.right + f32.hsync +
1124 f32.left) * fb_info.monspecs.hfmin < f32.f)
1125 pclock = &f32;
1126 else if ((plen * xres + fext.right + fext.hsync +
1127 fext.left) * fb_info.monspecs.hfmin < fext.f &&
1128 fext.f)
1129 pclock = &fext;
1130 else
1131 return -EINVAL;
1132
1133 left_margin = pclock->left / plen;
1134 right_margin = pclock->right / plen;
1135 hsync_len = pclock->hsync / plen;
1136 linesize = left_margin + xres + right_margin + hsync_len;
1137 upper_margin = 31;
1138 lower_margin = 11;
1139 vsync_len = 3;
1140 } else {
1141 /* Choose largest pixelclock <= wanted clock */
1142 int i;
1143 unsigned long pcl = ULONG_MAX;
1144 pclock = 0;
1145 for (i = 1; i <= 4; i *= 2) {
1146 if (f25.t * i >= var->pixclock &&
1147 f25.t * i < pcl) {
1148 pcl = f25.t * i;
1149 pclock = &f25;
1150 }
1151 if (f32.t * i >= var->pixclock &&
1152 f32.t * i < pcl) {
1153 pcl = f32.t * i;
1154 pclock = &f32;
1155 }
1156 if (fext.t && fext.t * i >= var->pixclock &&
1157 fext.t * i < pcl) {
1158 pcl = fext.t * i;
1159 pclock = &fext;
1160 }
1161 }
1162 if (!pclock)
1163 return -EINVAL;
1164 plen = pcl / pclock->t;
1165
1166 left_margin = var->left_margin;
1167 right_margin = var->right_margin;
1168 hsync_len = var->hsync_len;
1169 upper_margin = var->upper_margin;
1170 lower_margin = var->lower_margin;
1171 vsync_len = var->vsync_len;
1172 /* Internal unit is [single lines per (half-)frame] */
1173 if (var->vmode & FB_VMODE_INTERLACED) {
1174 /* # lines in half frame */
1175 /* External unit is [lines per full frame] */
1176 upper_margin = (upper_margin + 1) / 2;
1177 lower_margin = (lower_margin + 1) / 2;
1178 vsync_len = (vsync_len + 1) / 2;
1179 } else if (var->vmode & FB_VMODE_DOUBLE) {
1180 /* External unit is [double lines per frame] */
1181 upper_margin *= 2;
1182 lower_margin *= 2;
1183 vsync_len *= 2;
1184 }
1185 }
1186 if (pclock == &fext)
1187 longoffset = 1; /* VIDEL doesn't synchronize on short offset */
1188 }
1189 /* Is video bus bandwidth (32MB/s) too low for this resolution? */
1190 /* this is definitely wrong if bus clock != 32MHz */
1191 if (pclock->f / plen / 8 * bpp > 32000000L)
1192 return -EINVAL;
1193
1194 if (vsync_len < 1)
1195 vsync_len = 1;
1196
1197 /* include sync lengths in right/lower margin for all calculations */
1198 right_margin += hsync_len;
1199 lower_margin += vsync_len;
1200
1201 /* ! In all calculations of margins we use # of lines in half frame
1202 * (which is a full frame in non-interlace mode), so we can switch
1203 * between interlace and non-interlace without messing around
1204 * with these.
1205 */
1206 again:
1207 /* Set base_offset 128 and video bus width */
1208 par->hw.falcon.vid_control = mon_type | f030_bus_width;
1209 if (!longoffset)
1210 par->hw.falcon.vid_control |= VCO_SHORTOFFS; /* base_offset 64 */
1211 if (var->sync & FB_SYNC_HOR_HIGH_ACT)
1212 par->hw.falcon.vid_control |= VCO_HSYPOS;
1213 if (var->sync & FB_SYNC_VERT_HIGH_ACT)
1214 par->hw.falcon.vid_control |= VCO_VSYPOS;
1215 /* Pixelclock */
1216 par->hw.falcon.vid_control |= pclock->control_mask;
1217 /* External or internal clock */
1218 par->hw.falcon.sync = pclock->sync_mask | 0x2;
1219 /* Pixellength and prescale */
1220 par->hw.falcon.vid_mode = (2 / plen) << 2;
1221 if (doubleline)
1222 par->hw.falcon.vid_mode |= VMO_DOUBLE;
1223 if (interlace)
1224 par->hw.falcon.vid_mode |= VMO_INTER;
1225
1226 /*********************
1227 * Horizontal timing: unit = [master clock cycles]
1228 * unit of hxx-registers: [master clock cycles * prescale]
1229 * Hxx-registers are 9 bit wide
1230 *
1231 * 1 line = ((hht + 2) * 2 * prescale) clock cycles
1232 *
1233 * graphic output = hdb & 0x200 ?
1234 * ((hht + 2) * 2 - hdb + hde) * prescale - hdboff + hdeoff:
1235 * (hht + 2 - hdb + hde) * prescale - hdboff + hdeoff
1236 * (this must be a multiple of plen*128/bpp, on VGA pixels
1237 * to the right may be cut off with a bigger right margin)
1238 *
1239 * start of graphics relative to start of 1st halfline = hdb & 0x200 ?
1240 * (hdb - hht - 2) * prescale + hdboff :
1241 * hdb * prescale + hdboff
1242 *
1243 * end of graphics relative to start of 1st halfline =
1244 * (hde + hht + 2) * prescale + hdeoff
1245 *********************/
1246 /* Calculate VIDEL registers */
1247 {
1248 prescale = hxx_prescale(&par->hw.falcon);
1249 base_off = par->hw.falcon.vid_control & VCO_SHORTOFFS ? 64 : 128;
1250
1251 /* Offsets depend on video mode */
1252 /* Offsets are in clock cycles, divide by prescale to
1253 * calculate hd[be]-registers
1254 */
1255 if (par->hw.falcon.f_shift & 0x100) {
1256 align = 1;
1257 hde_off = 0;
1258 hdb_off = (base_off + 16 * plen) + prescale;
1259 } else {
1260 align = 128 / bpp;
1261 hde_off = ((128 / bpp + 2) * plen);
1262 if (par->hw.falcon.ste_mode)
1263 hdb_off = (64 + base_off + (128 / bpp + 2) * plen) + prescale;
1264 else
1265 hdb_off = (base_off + (128 / bpp + 18) * plen) + prescale;
1266 }
1267
1268 gstart = (prescale / 2 + plen * left_margin) / prescale;
1269 /* gend1 is for hde (gend-gstart multiple of align), shifter's xres */
1270 gend1 = gstart + roundup(xres, align) * plen / prescale;
1271 /* gend2 is for hbb, visible xres (rest to gend1 is cut off by hblank) */
1272 gend2 = gstart + xres * plen / prescale;
1273 par->HHT = plen * (left_margin + xres + right_margin) /
1274 (2 * prescale) - 2;
1275 /* par->HHT = (gend2 + plen * right_margin / prescale) / 2 - 2;*/
1276
1277 par->HDB = gstart - hdb_off / prescale;
1278 par->HBE = gstart;
1279 if (par->HDB < 0)
1280 par->HDB += par->HHT + 2 + 0x200;
1281 par->HDE = gend1 - par->HHT - 2 - hde_off / prescale;
1282 par->HBB = gend2 - par->HHT - 2;
1283 #if 0
1284 /* One more Videl constraint: data fetch of two lines must not overlap */
1285 if ((par->HDB & 0x200) && (par->HDB & ~0x200) - par->HDE <= 5) {
1286 /* if this happens increase margins, decrease hfreq. */
1287 }
1288 #endif
1289 if (hde_off % prescale)
1290 par->HBB++; /* compensate for non matching hde and hbb */
1291 par->HSS = par->HHT + 2 - plen * hsync_len / prescale;
1292 if (par->HSS < par->HBB)
1293 par->HSS = par->HBB;
1294 }
1295
1296 /* check hor. frequency */
1297 hfreq = pclock->f / ((par->HHT + 2) * prescale * 2);
1298 if (hfreq > fb_info.monspecs.hfmax && mon_type != F_MON_VGA) {
1299 /* ++guenther: ^^^^^^^^^^^^^^^^^^^ can't remember why I did this */
1300 /* Too high -> enlarge margin */
1301 left_margin += 1;
1302 right_margin += 1;
1303 goto again;
1304 }
1305 if (hfreq > fb_info.monspecs.hfmax || hfreq < fb_info.monspecs.hfmin)
1306 return -EINVAL;
1307
1308 /* Vxx-registers */
1309 /* All Vxx must be odd in non-interlace, since frame starts in the middle
1310 * of the first displayed line!
1311 * One frame consists of VFT+1 half lines. VFT+1 must be even in
1312 * non-interlace, odd in interlace mode for synchronisation.
1313 * Vxx-registers are 11 bit wide
1314 */
1315 par->VBE = (upper_margin * 2 + 1); /* must begin on odd halfline */
1316 par->VDB = par->VBE;
1317 par->VDE = yres;
1318 if (!interlace)
1319 par->VDE <<= 1;
1320 if (doubleline)
1321 par->VDE <<= 1; /* VDE now half lines per (half-)frame */
1322 par->VDE += par->VDB;
1323 par->VBB = par->VDE;
1324 par->VFT = par->VBB + (lower_margin * 2 - 1) - 1;
1325 par->VSS = par->VFT + 1 - (vsync_len * 2 - 1);
1326 /* vbb,vss,vft must be even in interlace mode */
1327 if (interlace) {
1328 par->VBB++;
1329 par->VSS++;
1330 par->VFT++;
1331 }
1332
1333 /* V-frequency check, hope I didn't create any loop here. */
1334 /* Interlace and doubleline are mutually exclusive. */
1335 vfreq = (hfreq * 2) / (par->VFT + 1);
1336 if (vfreq > fb_info.monspecs.vfmax && !doubleline && !interlace) {
1337 /* Too high -> try again with doubleline */
1338 doubleline = 1;
1339 goto again;
1340 } else if (vfreq < fb_info.monspecs.vfmin && !interlace && !doubleline) {
1341 /* Too low -> try again with interlace */
1342 interlace = 1;
1343 goto again;
1344 } else if (vfreq < fb_info.monspecs.vfmin && doubleline) {
1345 /* Doubleline too low -> clear doubleline and enlarge margins */
1346 int lines;
1347 doubleline = 0;
1348 for (lines = 0;
1349 (hfreq * 2) / (par->VFT + 1 + 4 * lines - 2 * yres) >
1350 fb_info.monspecs.vfmax;
1351 lines++)
1352 ;
1353 upper_margin += lines;
1354 lower_margin += lines;
1355 goto again;
1356 } else if (vfreq > fb_info.monspecs.vfmax && doubleline) {
1357 /* Doubleline too high -> enlarge margins */
1358 int lines;
1359 for (lines = 0;
1360 (hfreq * 2) / (par->VFT + 1 + 4 * lines) >
1361 fb_info.monspecs.vfmax;
1362 lines += 2)
1363 ;
1364 upper_margin += lines;
1365 lower_margin += lines;
1366 goto again;
1367 } else if (vfreq > fb_info.monspecs.vfmax && interlace) {
1368 /* Interlace, too high -> enlarge margins */
1369 int lines;
1370 for (lines = 0;
1371 (hfreq * 2) / (par->VFT + 1 + 4 * lines) >
1372 fb_info.monspecs.vfmax;
1373 lines++)
1374 ;
1375 upper_margin += lines;
1376 lower_margin += lines;
1377 goto again;
1378 } else if (vfreq < fb_info.monspecs.vfmin ||
1379 vfreq > fb_info.monspecs.vfmax)
1380 return -EINVAL;
1381
1382 set_screen_base:
1383 linelen = xres_virtual * bpp / 8;
1384 if (yres_virtual * linelen > screen_len && screen_len)
1385 return -EINVAL;
1386 if (yres * linelen > screen_len && screen_len)
1387 return -EINVAL;
1388 if (var->yoffset + yres > yres_virtual && yres_virtual)
1389 return -EINVAL;
1390 par->yres_virtual = yres_virtual;
1391 par->screen_base = screen_base + var->yoffset * linelen;
1392 par->hw.falcon.xoffset = 0;
1393
1394 par->next_line = linelen;
1395
1396 return 0;
1397 }
1398
1399 static int falcon_encode_var(struct fb_var_screeninfo *var,
1400 struct atafb_par *par)
1401 {
1402 /* !!! only for VGA !!! */
1403 int linelen;
1404 int prescale, plen;
1405 int hdb_off, hde_off, base_off;
1406 struct falcon_hw *hw = &par->hw.falcon;
1407
1408 memset(var, 0, sizeof(struct fb_var_screeninfo));
1409 /* possible frequencies: 25.175 or 32MHz */
1410 var->pixclock = hw->sync & 0x1 ? fext.t :
1411 hw->vid_control & VCO_CLOCK25 ? f25.t : f32.t;
1412
1413 var->height = -1;
1414 var->width = -1;
1415
1416 var->sync = 0;
1417 if (hw->vid_control & VCO_HSYPOS)
1418 var->sync |= FB_SYNC_HOR_HIGH_ACT;
1419 if (hw->vid_control & VCO_VSYPOS)
1420 var->sync |= FB_SYNC_VERT_HIGH_ACT;
1421
1422 var->vmode = FB_VMODE_NONINTERLACED;
1423 if (hw->vid_mode & VMO_INTER)
1424 var->vmode |= FB_VMODE_INTERLACED;
1425 if (hw->vid_mode & VMO_DOUBLE)
1426 var->vmode |= FB_VMODE_DOUBLE;
1427
1428 /* visible y resolution:
1429 * Graphics display starts at line VDB and ends at line
1430 * VDE. If interlace mode off unit of VC-registers is
1431 * half lines, else lines.
1432 */
1433 var->yres = hw->vde - hw->vdb;
1434 if (!(var->vmode & FB_VMODE_INTERLACED))
1435 var->yres >>= 1;
1436 if (var->vmode & FB_VMODE_DOUBLE)
1437 var->yres >>= 1;
1438
1439 /*
1440 * to get bpp, we must examine f_shift and st_shift.
1441 * f_shift is valid if any of bits no. 10, 8 or 4
1442 * is set. Priority in f_shift is: 10 ">" 8 ">" 4, i.e.
1443 * if bit 10 set then bit 8 and bit 4 don't care...
1444 * If all these bits are 0 get display depth from st_shift
1445 * (as for ST and STE)
1446 */
1447 if (hw->f_shift & 0x400) /* 2 colors */
1448 var->bits_per_pixel = 1;
1449 else if (hw->f_shift & 0x100) /* hicolor */
1450 var->bits_per_pixel = 16;
1451 else if (hw->f_shift & 0x010) /* 8 bitplanes */
1452 var->bits_per_pixel = 8;
1453 else if (hw->st_shift == 0)
1454 var->bits_per_pixel = 4;
1455 else if (hw->st_shift == 0x100)
1456 var->bits_per_pixel = 2;
1457 else /* if (hw->st_shift == 0x200) */
1458 var->bits_per_pixel = 1;
1459
1460 var->xres = hw->line_width * 16 / var->bits_per_pixel;
1461 var->xres_virtual = var->xres + hw->line_offset * 16 / var->bits_per_pixel;
1462 if (hw->xoffset)
1463 var->xres_virtual += 16;
1464
1465 if (var->bits_per_pixel == 16) {
1466 var->red.offset = 11;
1467 var->red.length = 5;
1468 var->red.msb_right = 0;
1469 var->green.offset = 5;
1470 var->green.length = 6;
1471 var->green.msb_right = 0;
1472 var->blue.offset = 0;
1473 var->blue.length = 5;
1474 var->blue.msb_right = 0;
1475 } else {
1476 var->red.offset = 0;
1477 var->red.length = hw->ste_mode ? 4 : 6;
1478 if (var->red.length > var->bits_per_pixel)
1479 var->red.length = var->bits_per_pixel;
1480 var->red.msb_right = 0;
1481 var->grayscale = 0;
1482 var->blue = var->green = var->red;
1483 }
1484 var->transp.offset = 0;
1485 var->transp.length = 0;
1486 var->transp.msb_right = 0;
1487
1488 linelen = var->xres_virtual * var->bits_per_pixel / 8;
1489 if (screen_len) {
1490 if (par->yres_virtual)
1491 var->yres_virtual = par->yres_virtual;
1492 else
1493 /* yres_virtual == 0 means use maximum */
1494 var->yres_virtual = screen_len / linelen;
1495 } else {
1496 if (hwscroll < 0)
1497 var->yres_virtual = 2 * var->yres;
1498 else
1499 var->yres_virtual = var->yres + hwscroll * 16;
1500 }
1501 var->xoffset = 0; /* TODO change this */
1502
1503 /* hdX-offsets */
1504 prescale = hxx_prescale(hw);
1505 plen = 4 >> (hw->vid_mode >> 2 & 0x3);
1506 base_off = hw->vid_control & VCO_SHORTOFFS ? 64 : 128;
1507 if (hw->f_shift & 0x100) {
1508 hde_off = 0;
1509 hdb_off = (base_off + 16 * plen) + prescale;
1510 } else {
1511 hde_off = ((128 / var->bits_per_pixel + 2) * plen);
1512 if (hw->ste_mode)
1513 hdb_off = (64 + base_off + (128 / var->bits_per_pixel + 2) * plen)
1514 + prescale;
1515 else
1516 hdb_off = (base_off + (128 / var->bits_per_pixel + 18) * plen)
1517 + prescale;
1518 }
1519
1520 /* Right margin includes hsync */
1521 var->left_margin = hdb_off + prescale * ((hw->hdb & 0x1ff) -
1522 (hw->hdb & 0x200 ? 2 + hw->hht : 0));
1523 if (hw->ste_mode || mon_type != F_MON_VGA)
1524 var->right_margin = prescale * (hw->hht + 2 - hw->hde) - hde_off;
1525 else
1526 /* can't use this in ste_mode, because hbb is +1 off */
1527 var->right_margin = prescale * (hw->hht + 2 - hw->hbb);
1528 var->hsync_len = prescale * (hw->hht + 2 - hw->hss);
1529
1530 /* Lower margin includes vsync */
1531 var->upper_margin = hw->vdb / 2; /* round down to full lines */
1532 var->lower_margin = (hw->vft + 1 - hw->vde + 1) / 2; /* round up */
1533 var->vsync_len = (hw->vft + 1 - hw->vss + 1) / 2; /* round up */
1534 if (var->vmode & FB_VMODE_INTERLACED) {
1535 var->upper_margin *= 2;
1536 var->lower_margin *= 2;
1537 var->vsync_len *= 2;
1538 } else if (var->vmode & FB_VMODE_DOUBLE) {
1539 var->upper_margin = (var->upper_margin + 1) / 2;
1540 var->lower_margin = (var->lower_margin + 1) / 2;
1541 var->vsync_len = (var->vsync_len + 1) / 2;
1542 }
1543
1544 var->pixclock *= plen;
1545 var->left_margin /= plen;
1546 var->right_margin /= plen;
1547 var->hsync_len /= plen;
1548
1549 var->right_margin -= var->hsync_len;
1550 var->lower_margin -= var->vsync_len;
1551
1552 if (screen_base)
1553 var->yoffset = (par->screen_base - screen_base) / linelen;
1554 else
1555 var->yoffset = 0;
1556 var->nonstd = 0; /* what is this for? */
1557 var->activate = 0;
1558 return 0;
1559 }
1560
1561 static int f_change_mode;
1562 static struct falcon_hw f_new_mode;
1563 static int f_pan_display;
1564
1565 static void falcon_get_par(struct atafb_par *par)
1566 {
1567 unsigned long addr;
1568 struct falcon_hw *hw = &par->hw.falcon;
1569
1570 hw->line_width = shifter_f030.scn_width;
1571 hw->line_offset = shifter_f030.off_next;
1572 hw->st_shift = videl.st_shift & 0x300;
1573 hw->f_shift = videl.f_shift;
1574 hw->vid_control = videl.control;
1575 hw->vid_mode = videl.mode;
1576 hw->sync = shifter.syncmode & 0x1;
1577 hw->xoffset = videl.xoffset & 0xf;
1578 hw->hht = videl.hht;
1579 hw->hbb = videl.hbb;
1580 hw->hbe = videl.hbe;
1581 hw->hdb = videl.hdb;
1582 hw->hde = videl.hde;
1583 hw->hss = videl.hss;
1584 hw->vft = videl.vft;
1585 hw->vbb = videl.vbb;
1586 hw->vbe = videl.vbe;
1587 hw->vdb = videl.vdb;
1588 hw->vde = videl.vde;
1589 hw->vss = videl.vss;
1590
1591 addr = (shifter.bas_hi & 0xff) << 16 |
1592 (shifter.bas_md & 0xff) << 8 |
1593 (shifter.bas_lo & 0xff);
1594 par->screen_base = phys_to_virt(addr);
1595
1596 /* derived parameters */
1597 hw->ste_mode = (hw->f_shift & 0x510) == 0 && hw->st_shift == 0x100;
1598 hw->mono = (hw->f_shift & 0x400) ||
1599 ((hw->f_shift & 0x510) == 0 && hw->st_shift == 0x200);
1600 }
1601
1602 static void falcon_set_par(struct atafb_par *par)
1603 {
1604 f_change_mode = 0;
1605
1606 /* only set screen_base if really necessary */
1607 if (current_par.screen_base != par->screen_base)
1608 fbhw->set_screen_base(par->screen_base);
1609
1610 /* Don't touch any other registers if we keep the default resolution */
1611 if (DontCalcRes)
1612 return;
1613
1614 /* Tell vbl-handler to change video mode.
1615 * We change modes only on next VBL, to avoid desynchronisation
1616 * (a shift to the right and wrap around by a random number of pixels
1617 * in all monochrome modes).
1618 * This seems to work on my Falcon.
1619 */
1620 f_new_mode = par->hw.falcon;
1621 f_change_mode = 1;
1622 }
1623
1624 static irqreturn_t falcon_vbl_switcher(int irq, void *dummy)
1625 {
1626 struct falcon_hw *hw = &f_new_mode;
1627
1628 if (f_change_mode) {
1629 f_change_mode = 0;
1630
1631 if (hw->sync & 0x1) {
1632 /* Enable external pixelclock. This code only for ScreenWonder */
1633 *(volatile unsigned short *)0xffff9202 = 0xffbf;
1634 } else {
1635 /* Turn off external clocks. Read sets all output bits to 1. */
1636 *(volatile unsigned short *)0xffff9202;
1637 }
1638 shifter.syncmode = hw->sync;
1639
1640 videl.hht = hw->hht;
1641 videl.hbb = hw->hbb;
1642 videl.hbe = hw->hbe;
1643 videl.hdb = hw->hdb;
1644 videl.hde = hw->hde;
1645 videl.hss = hw->hss;
1646 videl.vft = hw->vft;
1647 videl.vbb = hw->vbb;
1648 videl.vbe = hw->vbe;
1649 videl.vdb = hw->vdb;
1650 videl.vde = hw->vde;
1651 videl.vss = hw->vss;
1652
1653 videl.f_shift = 0; /* write enables Falcon palette, 0: 4 planes */
1654 if (hw->ste_mode) {
1655 videl.st_shift = hw->st_shift; /* write enables STE palette */
1656 } else {
1657 /* IMPORTANT:
1658 * set st_shift 0, so we can tell the screen-depth if f_shift == 0.
1659 * Writing 0 to f_shift enables 4 plane Falcon mode but
1660 * doesn't set st_shift. st_shift != 0 (!= 4planes) is impossible
1661 * with Falcon palette.
1662 */
1663 videl.st_shift = 0;
1664 /* now back to Falcon palette mode */
1665 videl.f_shift = hw->f_shift;
1666 }
1667 /* writing to st_shift changed scn_width and vid_mode */
1668 videl.xoffset = hw->xoffset;
1669 shifter_f030.scn_width = hw->line_width;
1670 shifter_f030.off_next = hw->line_offset;
1671 videl.control = hw->vid_control;
1672 videl.mode = hw->vid_mode;
1673 }
1674 if (f_pan_display) {
1675 f_pan_display = 0;
1676 videl.xoffset = current_par.hw.falcon.xoffset;
1677 shifter_f030.off_next = current_par.hw.falcon.line_offset;
1678 }
1679 return IRQ_HANDLED;
1680 }
1681
1682 static int falcon_pan_display(struct fb_var_screeninfo *var,
1683 struct fb_info *info)
1684 {
1685 struct atafb_par *par = (struct atafb_par *)info->par;
1686
1687 int xoffset;
1688 int bpp = info->var.bits_per_pixel;
1689
1690 if (bpp == 1)
1691 var->xoffset = up(var->xoffset, 32);
1692 if (bpp != 16)
1693 par->hw.falcon.xoffset = var->xoffset & 15;
1694 else {
1695 par->hw.falcon.xoffset = 0;
1696 var->xoffset = up(var->xoffset, 2);
1697 }
1698 par->hw.falcon.line_offset = bpp *
1699 (info->var.xres_virtual - info->var.xres) / 16;
1700 if (par->hw.falcon.xoffset)
1701 par->hw.falcon.line_offset -= bpp;
1702 xoffset = var->xoffset - par->hw.falcon.xoffset;
1703
1704 par->screen_base = screen_base +
1705 (var->yoffset * info->var.xres_virtual + xoffset) * bpp / 8;
1706 if (fbhw->set_screen_base)
1707 fbhw->set_screen_base(par->screen_base);
1708 else
1709 return -EINVAL; /* shouldn't happen */
1710 f_pan_display = 1;
1711 return 0;
1712 }
1713
1714 static int falcon_setcolreg(unsigned int regno, unsigned int red,
1715 unsigned int green, unsigned int blue,
1716 unsigned int transp, struct fb_info *info)
1717 {
1718 if (regno > 255)
1719 return 1;
1720 f030_col[regno] = (((red & 0xfc00) << 16) |
1721 ((green & 0xfc00) << 8) |
1722 ((blue & 0xfc00) >> 8));
1723 if (regno < 16) {
1724 shifter_tt.color_reg[regno] =
1725 (((red & 0xe000) >> 13) | ((red & 0x1000) >> 12) << 8) |
1726 (((green & 0xe000) >> 13) | ((green & 0x1000) >> 12) << 4) |
1727 ((blue & 0xe000) >> 13) | ((blue & 0x1000) >> 12);
1728 #ifdef ATAFB_FALCON
1729 ((u32 *)info->pseudo_palette)[regno] = ((red & 0xf800) |
1730 ((green & 0xfc00) >> 5) |
1731 ((blue & 0xf800) >> 11));
1732 #endif
1733 }
1734 return 0;
1735 }
1736
1737 static int falcon_blank(int blank_mode)
1738 {
1739 /* ++guenther: we can switch off graphics by changing VDB and VDE,
1740 * so VIDEL doesn't hog the bus while saving.
1741 * (this may affect usleep()).
1742 */
1743 int vdb, vss, hbe, hss;
1744
1745 if (mon_type == F_MON_SM) /* this doesn't work on SM124 */
1746 return 1;
1747
1748 vdb = current_par.VDB;
1749 vss = current_par.VSS;
1750 hbe = current_par.HBE;
1751 hss = current_par.HSS;
1752
1753 if (blank_mode >= 1) {
1754 /* disable graphics output (this speeds up the CPU) ... */
1755 vdb = current_par.VFT + 1;
1756 /* ... and blank all lines */
1757 hbe = current_par.HHT + 2;
1758 }
1759 /* use VESA suspend modes on VGA monitors */
1760 if (mon_type == F_MON_VGA) {
1761 if (blank_mode == 2 || blank_mode == 4)
1762 vss = current_par.VFT + 1;
1763 if (blank_mode == 3 || blank_mode == 4)
1764 hss = current_par.HHT + 2;
1765 }
1766
1767 videl.vdb = vdb;
1768 videl.vss = vss;
1769 videl.hbe = hbe;
1770 videl.hss = hss;
1771
1772 return 0;
1773 }
1774
1775 static int falcon_detect(void)
1776 {
1777 struct atafb_par par;
1778 unsigned char fhw;
1779
1780 /* Determine connected monitor and set monitor parameters */
1781 fhw = *(unsigned char *)0xffff8006;
1782 mon_type = fhw >> 6 & 0x3;
1783 /* bit 1 of fhw: 1=32 bit ram bus, 0=16 bit */
1784 f030_bus_width = fhw << 6 & 0x80;
1785 switch (mon_type) {
1786 case F_MON_SM:
1787 fb_info.monspecs.vfmin = 70;
1788 fb_info.monspecs.vfmax = 72;
1789 fb_info.monspecs.hfmin = 35713;
1790 fb_info.monspecs.hfmax = 35715;
1791 break;
1792 case F_MON_SC:
1793 case F_MON_TV:
1794 /* PAL...NTSC */
1795 fb_info.monspecs.vfmin = 49; /* not 50, since TOS defaults to 49.9x Hz */
1796 fb_info.monspecs.vfmax = 60;
1797 fb_info.monspecs.hfmin = 15620;
1798 fb_info.monspecs.hfmax = 15755;
1799 break;
1800 }
1801 /* initialize hsync-len */
1802 f25.hsync = h_syncs[mon_type] / f25.t;
1803 f32.hsync = h_syncs[mon_type] / f32.t;
1804 if (fext.t)
1805 fext.hsync = h_syncs[mon_type] / fext.t;
1806
1807 falcon_get_par(&par);
1808 falcon_encode_var(&atafb_predefined[0], &par);
1809
1810 /* Detected mode is always the "autodetect" slot */
1811 return 1;
1812 }
1813
1814 #endif /* ATAFB_FALCON */
1815
1816 /* ------------------- ST(E) specific functions ---------------------- */
1817
1818 #ifdef ATAFB_STE
1819
1820 static int stste_encode_fix(struct fb_fix_screeninfo *fix,
1821 struct atafb_par *par)
1822 {
1823 int mode;
1824
1825 strcpy(fix->id, "Atari Builtin");
1826 fix->smem_start = (unsigned long)real_screen_base;
1827 fix->smem_len = screen_len;
1828 fix->type = FB_TYPE_INTERLEAVED_PLANES;
1829 fix->type_aux = 2;
1830 fix->visual = FB_VISUAL_PSEUDOCOLOR;
1831 mode = par->hw.st.mode & 3;
1832 if (mode == ST_HIGH) {
1833 fix->type = FB_TYPE_PACKED_PIXELS;
1834 fix->type_aux = 0;
1835 fix->visual = FB_VISUAL_MONO10;
1836 }
1837 if (ATARIHW_PRESENT(EXTD_SHIFTER)) {
1838 fix->xpanstep = 16;
1839 fix->ypanstep = 1;
1840 } else {
1841 fix->xpanstep = 0;
1842 fix->ypanstep = 0;
1843 }
1844 fix->ywrapstep = 0;
1845 fix->line_length = par->next_line;
1846 fix->accel = FB_ACCEL_ATARIBLITT;
1847 return 0;
1848 }
1849
1850 static int stste_decode_var(struct fb_var_screeninfo *var,
1851 struct atafb_par *par)
1852 {
1853 int xres = var->xres;
1854 int yres = var->yres;
1855 int bpp = var->bits_per_pixel;
1856 int linelen;
1857 int yres_virtual = var->yres_virtual;
1858
1859 if (mono_moni) {
1860 if (bpp > 1 || xres > sttt_xres || yres > st_yres)
1861 return -EINVAL;
1862 par->hw.st.mode = ST_HIGH;
1863 xres = sttt_xres;
1864 yres = st_yres;
1865 bpp = 1;
1866 } else {
1867 if (bpp > 4 || xres > sttt_xres || yres > st_yres)
1868 return -EINVAL;
1869 if (bpp > 2) {
1870 if (xres > sttt_xres / 2 || yres > st_yres / 2)
1871 return -EINVAL;
1872 par->hw.st.mode = ST_LOW;
1873 xres = sttt_xres / 2;
1874 yres = st_yres / 2;
1875 bpp = 4;
1876 } else if (bpp > 1) {
1877 if (xres > sttt_xres || yres > st_yres / 2)
1878 return -EINVAL;
1879 par->hw.st.mode = ST_MID;
1880 xres = sttt_xres;
1881 yres = st_yres / 2;
1882 bpp = 2;
1883 } else
1884 return -EINVAL;
1885 }
1886 if (yres_virtual <= 0)
1887 yres_virtual = 0;
1888 else if (yres_virtual < yres)
1889 yres_virtual = yres;
1890 if (var->sync & FB_SYNC_EXT)
1891 par->hw.st.sync = (par->hw.st.sync & ~1) | 1;
1892 else
1893 par->hw.st.sync = (par->hw.st.sync & ~1);
1894 linelen = xres * bpp / 8;
1895 if (yres_virtual * linelen > screen_len && screen_len)
1896 return -EINVAL;
1897 if (yres * linelen > screen_len && screen_len)
1898 return -EINVAL;
1899 if (var->yoffset + yres > yres_virtual && yres_virtual)
1900 return -EINVAL;
1901 par->yres_virtual = yres_virtual;
1902 par->screen_base = screen_base + var->yoffset * linelen;
1903 par->next_line = linelen;
1904 return 0;
1905 }
1906
1907 static int stste_encode_var(struct fb_var_screeninfo *var,
1908 struct atafb_par *par)
1909 {
1910 int linelen;
1911 memset(var, 0, sizeof(struct fb_var_screeninfo));
1912 var->red.offset = 0;
1913 var->red.length = ATARIHW_PRESENT(EXTD_SHIFTER) ? 4 : 3;
1914 var->red.msb_right = 0;
1915 var->grayscale = 0;
1916
1917 var->pixclock = 31041;
1918 var->left_margin = 120; /* these are incorrect */
1919 var->right_margin = 100;
1920 var->upper_margin = 8;
1921 var->lower_margin = 16;
1922 var->hsync_len = 140;
1923 var->vsync_len = 30;
1924
1925 var->height = -1;
1926 var->width = -1;
1927
1928 if (!(par->hw.st.sync & 1))
1929 var->sync = 0;
1930 else
1931 var->sync = FB_SYNC_EXT;
1932
1933 switch (par->hw.st.mode & 3) {
1934 case ST_LOW:
1935 var->xres = sttt_xres / 2;
1936 var->yres = st_yres / 2;
1937 var->bits_per_pixel = 4;
1938 break;
1939 case ST_MID:
1940 var->xres = sttt_xres;
1941 var->yres = st_yres / 2;
1942 var->bits_per_pixel = 2;
1943 break;
1944 case ST_HIGH:
1945 var->xres = sttt_xres;
1946 var->yres = st_yres;
1947 var->bits_per_pixel = 1;
1948 break;
1949 }
1950 var->blue = var->green = var->red;
1951 var->transp.offset = 0;
1952 var->transp.length = 0;
1953 var->transp.msb_right = 0;
1954 var->xres_virtual = sttt_xres_virtual;
1955 linelen = var->xres_virtual * var->bits_per_pixel / 8;
1956 ovsc_addlen = linelen * (sttt_yres_virtual - st_yres);
1957
1958 if (!use_hwscroll)
1959 var->yres_virtual = var->yres;
1960 else if (screen_len) {
1961 if (par->yres_virtual)
1962 var->yres_virtual = par->yres_virtual;
1963 else
1964 /* yres_virtual == 0 means use maximum */
1965 var->yres_virtual = screen_len / linelen;
1966 } else {
1967 if (hwscroll < 0)
1968 var->yres_virtual = 2 * var->yres;
1969 else
1970 var->yres_virtual = var->yres + hwscroll * 16;
1971 }
1972 var->xoffset = 0;
1973 if (screen_base)
1974 var->yoffset = (par->screen_base - screen_base) / linelen;
1975 else
1976 var->yoffset = 0;
1977 var->nonstd = 0;
1978 var->activate = 0;
1979 var->vmode = FB_VMODE_NONINTERLACED;
1980 return 0;
1981 }
1982
1983 static void stste_get_par(struct atafb_par *par)
1984 {
1985 unsigned long addr;
1986 par->hw.st.mode = shifter_tt.st_shiftmode;
1987 par->hw.st.sync = shifter.syncmode;
1988 addr = ((shifter.bas_hi & 0xff) << 16) |
1989 ((shifter.bas_md & 0xff) << 8);
1990 if (ATARIHW_PRESENT(EXTD_SHIFTER))
1991 addr |= (shifter.bas_lo & 0xff);
1992 par->screen_base = phys_to_virt(addr);
1993 }
1994
1995 static void stste_set_par(struct atafb_par *par)
1996 {
1997 shifter_tt.st_shiftmode = par->hw.st.mode;
1998 shifter.syncmode = par->hw.st.sync;
1999 /* only set screen_base if really necessary */
2000 if (current_par.screen_base != par->screen_base)
2001 fbhw->set_screen_base(par->screen_base);
2002 }
2003
2004 static int stste_setcolreg(unsigned int regno, unsigned int red,
2005 unsigned int green, unsigned int blue,
2006 unsigned int transp, struct fb_info *info)
2007 {
2008 if (regno > 15)
2009 return 1;
2010 red >>= 12;
2011 blue >>= 12;
2012 green >>= 12;
2013 if (ATARIHW_PRESENT(EXTD_SHIFTER))
2014 shifter_tt.color_reg[regno] =
2015 (((red & 0xe) >> 1) | ((red & 1) << 3) << 8) |
2016 (((green & 0xe) >> 1) | ((green & 1) << 3) << 4) |
2017 ((blue & 0xe) >> 1) | ((blue & 1) << 3);
2018 else
2019 shifter_tt.color_reg[regno] =
2020 ((red & 0xe) << 7) |
2021 ((green & 0xe) << 3) |
2022 ((blue & 0xe) >> 1);
2023 return 0;
2024 }
2025
2026 static int stste_detect(void)
2027 {
2028 struct atafb_par par;
2029
2030 /* Determine the connected monitor: The DMA sound must be
2031 * disabled before reading the MFP GPIP, because the Sound
2032 * Done Signal and the Monochrome Detect are XORed together!
2033 */
2034 if (ATARIHW_PRESENT(PCM_8BIT)) {
2035 tt_dmasnd.ctrl = DMASND_CTRL_OFF;
2036 udelay(20); /* wait a while for things to settle down */
2037 }
2038 mono_moni = (st_mfp.par_dt_reg & 0x80) == 0;
2039
2040 stste_get_par(&par);
2041 stste_encode_var(&atafb_predefined[0], &par);
2042
2043 if (!ATARIHW_PRESENT(EXTD_SHIFTER))
2044 use_hwscroll = 0;
2045 return 1;
2046 }
2047
2048 static void stste_set_screen_base(void *s_base)
2049 {
2050 unsigned long addr;
2051 addr = virt_to_phys(s_base);
2052 /* Setup Screen Memory */
2053 shifter.bas_hi = (unsigned char)((addr & 0xff0000) >> 16);
2054 shifter.bas_md = (unsigned char)((addr & 0x00ff00) >> 8);
2055 if (ATARIHW_PRESENT(EXTD_SHIFTER))
2056 shifter.bas_lo = (unsigned char)(addr & 0x0000ff);
2057 }
2058
2059 #endif /* ATAFB_STE */
2060
2061 /* Switching the screen size should be done during vsync, otherwise
2062 * the margins may get messed up. This is a well known problem of
2063 * the ST's video system.
2064 *
2065 * Unfortunately there is hardly any way to find the vsync, as the
2066 * vertical blank interrupt is no longer in time on machines with
2067 * overscan type modifications.
2068 *
2069 * We can, however, use Timer B to safely detect the black shoulder,
2070 * but then we've got to guess an appropriate delay to find the vsync.
2071 * This might not work on every machine.
2072 *
2073 * martin_rogge @ ki.maus.de, 8th Aug 1995
2074 */
2075
2076 #define LINE_DELAY (mono_moni ? 30 : 70)
2077 #define SYNC_DELAY (mono_moni ? 1500 : 2000)
2078
2079 /* SWITCH_ACIA may be used for Falcon (ScreenBlaster III internal!) */
2080 static void st_ovsc_switch(void)
2081 {
2082 unsigned long flags;
2083 register unsigned char old, new;
2084
2085 if (!(atari_switches & ATARI_SWITCH_OVSC_MASK))
2086 return;
2087 local_irq_save(flags);
2088
2089 st_mfp.tim_ct_b = 0x10;
2090 st_mfp.active_edge |= 8;
2091 st_mfp.tim_ct_b = 0;
2092 st_mfp.tim_dt_b = 0xf0;
2093 st_mfp.tim_ct_b = 8;
2094 while (st_mfp.tim_dt_b > 1) /* TOS does it this way, don't ask why */
2095 ;
2096 new = st_mfp.tim_dt_b;
2097 do {
2098 udelay(LINE_DELAY);
2099 old = new;
2100 new = st_mfp.tim_dt_b;
2101 } while (old != new);
2102 st_mfp.tim_ct_b = 0x10;
2103 udelay(SYNC_DELAY);
2104
2105 if (atari_switches & ATARI_SWITCH_OVSC_IKBD)
2106 acia.key_ctrl = ACIA_DIV64 | ACIA_D8N1S | ACIA_RHTID | ACIA_RIE;
2107 if (atari_switches & ATARI_SWITCH_OVSC_MIDI)
2108 acia.mid_ctrl = ACIA_DIV16 | ACIA_D8N1S | ACIA_RHTID;
2109 if (atari_switches & (ATARI_SWITCH_OVSC_SND6|ATARI_SWITCH_OVSC_SND7)) {
2110 sound_ym.rd_data_reg_sel = 14;
2111 sound_ym.wd_data = sound_ym.rd_data_reg_sel |
2112 ((atari_switches & ATARI_SWITCH_OVSC_SND6) ? 0x40:0) |
2113 ((atari_switches & ATARI_SWITCH_OVSC_SND7) ? 0x80:0);
2114 }
2115 local_irq_restore(flags);
2116 }
2117
2118 /* ------------------- External Video ---------------------- */
2119
2120 #ifdef ATAFB_EXT
2121
2122 static int ext_encode_fix(struct fb_fix_screeninfo *fix, struct atafb_par *par)
2123 {
2124 strcpy(fix->id, "Unknown Extern");
2125 fix->smem_start = (unsigned long)external_addr;
2126 fix->smem_len = PAGE_ALIGN(external_len);
2127 if (external_depth == 1) {
2128 fix->type = FB_TYPE_PACKED_PIXELS;
2129 /* The letters 'n' and 'i' in the "atavideo=external:" stand
2130 * for "normal" and "inverted", rsp., in the monochrome case */
2131 fix->visual =
2132 (external_pmode == FB_TYPE_INTERLEAVED_PLANES ||
2133 external_pmode == FB_TYPE_PACKED_PIXELS) ?
2134 FB_VISUAL_MONO10 : FB_VISUAL_MONO01;
2135 } else {
2136 /* Use STATIC if we don't know how to access color registers */
2137 int visual = external_vgaiobase ?
2138 FB_VISUAL_PSEUDOCOLOR :
2139 FB_VISUAL_STATIC_PSEUDOCOLOR;
2140 switch (external_pmode) {
2141 case -1: /* truecolor */
2142 fix->type = FB_TYPE_PACKED_PIXELS;
2143 fix->visual = FB_VISUAL_TRUECOLOR;
2144 break;
2145 case FB_TYPE_PACKED_PIXELS:
2146 fix->type = FB_TYPE_PACKED_PIXELS;
2147 fix->visual = visual;
2148 break;
2149 case FB_TYPE_PLANES:
2150 fix->type = FB_TYPE_PLANES;
2151 fix->visual = visual;
2152 break;
2153 case FB_TYPE_INTERLEAVED_PLANES:
2154 fix->type = FB_TYPE_INTERLEAVED_PLANES;
2155 fix->type_aux = 2;
2156 fix->visual = visual;
2157 break;
2158 }
2159 }
2160 fix->xpanstep = 0;
2161 fix->ypanstep = 0;
2162 fix->ywrapstep = 0;
2163 fix->line_length = par->next_line;
2164 return 0;
2165 }
2166
2167 static int ext_decode_var(struct fb_var_screeninfo *var, struct atafb_par *par)
2168 {
2169 struct fb_var_screeninfo *myvar = &atafb_predefined[0];
2170
2171 if (var->bits_per_pixel > myvar->bits_per_pixel ||
2172 var->xres > myvar->xres ||
2173 var->xres_virtual > myvar->xres_virtual ||
2174 var->yres > myvar->yres ||
2175 var->xoffset > 0 ||
2176 var->yoffset > 0)
2177 return -EINVAL;
2178
2179 par->next_line = external_xres_virtual * external_depth / 8;
2180 return 0;
2181 }
2182
2183 static int ext_encode_var(struct fb_var_screeninfo *var, struct atafb_par *par)
2184 {
2185 memset(var, 0, sizeof(struct fb_var_screeninfo));
2186 var->red.offset = 0;
2187 var->red.length = (external_pmode == -1) ? external_depth / 3 :
2188 (external_vgaiobase ? external_bitspercol : 0);
2189 var->red.msb_right = 0;
2190 var->grayscale = 0;
2191
2192 var->pixclock = 31041;
2193 var->left_margin = 120; /* these are surely incorrect */
2194 var->right_margin = 100;
2195 var->upper_margin = 8;
2196 var->lower_margin = 16;
2197 var->hsync_len = 140;
2198 var->vsync_len = 30;
2199
2200 var->height = -1;
2201 var->width = -1;
2202
2203 var->sync = 0;
2204
2205 var->xres = external_xres;
2206 var->yres = external_yres;
2207 var->xres_virtual = external_xres_virtual;
2208 var->bits_per_pixel = external_depth;
2209
2210 var->blue = var->green = var->red;
2211 var->transp.offset = 0;
2212 var->transp.length = 0;
2213 var->transp.msb_right = 0;
2214 var->yres_virtual = var->yres;
2215 var->xoffset = 0;
2216 var->yoffset = 0;
2217 var->nonstd = 0;
2218 var->activate = 0;
2219 var->vmode = FB_VMODE_NONINTERLACED;
2220 return 0;
2221 }
2222
2223 static void ext_get_par(struct atafb_par *par)
2224 {
2225 par->screen_base = external_addr;
2226 }
2227
2228 static void ext_set_par(struct atafb_par *par)
2229 {
2230 }
2231
2232 #define OUTB(port,val) \
2233 *((unsigned volatile char *) ((port)+external_vgaiobase)) = (val)
2234 #define INB(port) \
2235 (*((unsigned volatile char *) ((port)+external_vgaiobase)))
2236 #define DACDelay \
2237 do { \
2238 unsigned char tmp = INB(0x3da); \
2239 tmp = INB(0x3da); \
2240 } while (0)
2241
2242 static int ext_setcolreg(unsigned int regno, unsigned int red,
2243 unsigned int green, unsigned int blue,
2244 unsigned int transp, struct fb_info *info)
2245 {
2246 unsigned char colmask = (1 << external_bitspercol) - 1;
2247
2248 if (!external_vgaiobase)
2249 return 1;
2250
2251 switch (external_card_type) {
2252 case IS_VGA:
2253 OUTB(0x3c8, regno);
2254 DACDelay;
2255 OUTB(0x3c9, red & colmask);
2256 DACDelay;
2257 OUTB(0x3c9, green & colmask);
2258 DACDelay;
2259 OUTB(0x3c9, blue & colmask);
2260 DACDelay;
2261 return 0;
2262
2263 case IS_MV300:
2264 OUTB((MV300_reg[regno] << 2) + 1, red);
2265 OUTB((MV300_reg[regno] << 2) + 1, green);
2266 OUTB((MV300_reg[regno] << 2) + 1, blue);
2267 return 0;
2268
2269 default:
2270 return 1;
2271 }
2272 }
2273
2274 static int ext_detect(void)
2275 {
2276 struct fb_var_screeninfo *myvar = &atafb_predefined[0];
2277 struct atafb_par dummy_par;
2278
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);
2284 return 1;
2285 }
2286
2287 #endif /* ATAFB_EXT */
2288
2289 /* ------ This is the same for most hardware types -------- */
2290
2291 static void set_screen_base(void *s_base)
2292 {
2293 unsigned long addr;
2294
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);
2300 }
2301
2302 static int pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
2303 {
2304 struct atafb_par *par = (struct atafb_par *)info->par;
2305
2306 if (!fbhw->set_screen_base ||
2307 (!ATARIHW_PRESENT(EXTD_SHIFTER) && var->xoffset))
2308 return -EINVAL;
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);
2314 return 0;
2315 }
2316
2317 /* ------------ Interfaces to hardware functions ------------ */
2318
2319 #ifdef ATAFB_TT
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,
2329 };
2330 #endif
2331
2332 #ifdef ATAFB_FALCON
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,
2343 };
2344 #endif
2345
2346 #ifdef ATAFB_STE
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
2356 };
2357 #endif
2358
2359 #ifdef ATAFB_EXT
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,
2367 };
2368 #endif
2369
2370 static void ata_get_par(struct atafb_par *par)
2371 {
2372 if (current_par_valid)
2373 *par = current_par;
2374 else
2375 fbhw->get_par(par);
2376 }
2377
2378 static void ata_set_par(struct atafb_par *par)
2379 {
2380 fbhw->set_par(par);
2381 current_par = *par;
2382 current_par_valid = 1;
2383 }
2384
2385
2386 /* =========================================================== */
2387 /* ============== Hardware Independent Functions ============= */
2388 /* =========================================================== */
2389
2390 /* used for hardware scrolling */
2391
2392 static int do_fb_set_var(struct fb_var_screeninfo *var, int isactive)
2393 {
2394 int err, activate;
2395 struct atafb_par par;
2396
2397 err = fbhw->decode_var(var, &par);
2398 if (err)
2399 return err;
2400 activate = var->activate;
2401 if (((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) && isactive)
2402 ata_set_par(&par);
2403 fbhw->encode_var(var, &par);
2404 var->activate = activate;
2405 return 0;
2406 }
2407
2408 static int atafb_get_fix(struct fb_fix_screeninfo *fix, struct fb_info *info)
2409 {
2410 struct atafb_par par;
2411 int err;
2412 // Get fix directly (case con == -1 before)??
2413 err = fbhw->decode_var(&info->var, &par);
2414 if (err)
2415 return err;
2416 memset(fix, 0, sizeof(struct fb_fix_screeninfo));
2417 mutex_lock(&info->mm_lock);
2418 err = fbhw->encode_fix(fix, &par);
2419 mutex_unlock(&info->mm_lock);
2420 return err;
2421 }
2422
2423 static int atafb_get_var(struct fb_var_screeninfo *var, struct fb_info *info)
2424 {
2425 struct atafb_par par;
2426
2427 ata_get_par(&par);
2428 fbhw->encode_var(var, &par);
2429
2430 return 0;
2431 }
2432
2433 // No longer called by fbcon!
2434 // Still called by set_var internally
2435
2436 static void atafb_set_disp(struct fb_info *info)
2437 {
2438 atafb_get_var(&info->var, info);
2439 atafb_get_fix(&info->fix, info);
2440
2441 info->screen_base = (void *)info->fix.smem_start;
2442 }
2443
2444 static int atafb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
2445 u_int transp, struct fb_info *info)
2446 {
2447 red >>= 8;
2448 green >>= 8;
2449 blue >>= 8;
2450
2451 return info->fbops->fb_setcolreg(regno, red, green, blue, transp, info);
2452 }
2453
2454 static int
2455 atafb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
2456 {
2457 int xoffset = var->xoffset;
2458 int yoffset = var->yoffset;
2459 int err;
2460
2461 if (var->vmode & FB_VMODE_YWRAP) {
2462 if (yoffset < 0 || yoffset >= info->var.yres_virtual || xoffset)
2463 return -EINVAL;
2464 } else {
2465 if (xoffset + info->var.xres > info->var.xres_virtual ||
2466 yoffset + info->var.yres > info->var.yres_virtual)
2467 return -EINVAL;
2468 }
2469
2470 if (fbhw->pan_display) {
2471 err = fbhw->pan_display(var, info);
2472 if (err)
2473 return err;
2474 } else
2475 return -EINVAL;
2476
2477 info->var.xoffset = xoffset;
2478 info->var.yoffset = yoffset;
2479
2480 if (var->vmode & FB_VMODE_YWRAP)
2481 info->var.vmode |= FB_VMODE_YWRAP;
2482 else
2483 info->var.vmode &= ~FB_VMODE_YWRAP;
2484
2485 return 0;
2486 }
2487
2488 /*
2489 * generic drawing routines; imageblit needs updating for image depth > 1
2490 */
2491
2492 #if BITS_PER_LONG == 32
2493 #define BYTES_PER_LONG 4
2494 #define SHIFT_PER_LONG 5
2495 #elif BITS_PER_LONG == 64
2496 #define BYTES_PER_LONG 8
2497 #define SHIFT_PER_LONG 6
2498 #else
2499 #define Please update me
2500 #endif
2501
2502
2503 static void atafb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
2504 {
2505 struct atafb_par *par = (struct atafb_par *)info->par;
2506 int x2, y2;
2507 u32 width, height;
2508
2509 if (!rect->width || !rect->height)
2510 return;
2511
2512 #ifdef ATAFB_FALCON
2513 if (info->var.bits_per_pixel == 16) {
2514 cfb_fillrect(info, rect);
2515 return;
2516 }
2517 #endif
2518
2519 /*
2520 * We could use hardware clipping but on many cards you get around
2521 * hardware clipping by writing to framebuffer directly.
2522 * */
2523 x2 = rect->dx + rect->width;
2524 y2 = rect->dy + rect->height;
2525 x2 = x2 < info->var.xres_virtual ? x2 : info->var.xres_virtual;
2526 y2 = y2 < info->var.yres_virtual ? y2 : info->var.yres_virtual;
2527 width = x2 - rect->dx;
2528 height = y2 - rect->dy;
2529
2530 if (info->var.bits_per_pixel == 1)
2531 atafb_mfb_fillrect(info, par->next_line, rect->color,
2532 rect->dy, rect->dx, height, width);
2533 else if (info->var.bits_per_pixel == 2)
2534 atafb_iplan2p2_fillrect(info, par->next_line, rect->color,
2535 rect->dy, rect->dx, height, width);
2536 else if (info->var.bits_per_pixel == 4)
2537 atafb_iplan2p4_fillrect(info, par->next_line, rect->color,
2538 rect->dy, rect->dx, height, width);
2539 else
2540 atafb_iplan2p8_fillrect(info, par->next_line, rect->color,
2541 rect->dy, rect->dx, height, width);
2542
2543 return;
2544 }
2545
2546 static void atafb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
2547 {
2548 struct atafb_par *par = (struct atafb_par *)info->par;
2549 int x2, y2;
2550 u32 dx, dy, sx, sy, width, height;
2551 int rev_copy = 0;
2552
2553 #ifdef ATAFB_FALCON
2554 if (info->var.bits_per_pixel == 16) {
2555 cfb_copyarea(info, area);
2556 return;
2557 }
2558 #endif
2559
2560 /* clip the destination */
2561 x2 = area->dx + area->width;
2562 y2 = area->dy + area->height;
2563 dx = area->dx > 0 ? area->dx : 0;
2564 dy = area->dy > 0 ? area->dy : 0;
2565 x2 = x2 < info->var.xres_virtual ? x2 : info->var.xres_virtual;
2566 y2 = y2 < info->var.yres_virtual ? y2 : info->var.yres_virtual;
2567 width = x2 - dx;
2568 height = y2 - dy;
2569
2570 if (area->sx + dx < area->dx || area->sy + dy < area->dy)
2571 return;
2572
2573 /* update sx,sy */
2574 sx = area->sx + (dx - area->dx);
2575 sy = area->sy + (dy - area->dy);
2576
2577 /* the source must be completely inside the virtual screen */
2578 if (sx + width > info->var.xres_virtual ||
2579 sy + height > info->var.yres_virtual)
2580 return;
2581
2582 if (dy > sy || (dy == sy && dx > sx)) {
2583 dy += height;
2584 sy += height;
2585 rev_copy = 1;
2586 }
2587
2588 if (info->var.bits_per_pixel == 1)
2589 atafb_mfb_copyarea(info, par->next_line, sy, sx, dy, dx, height, width);
2590 else if (info->var.bits_per_pixel == 2)
2591 atafb_iplan2p2_copyarea(info, par->next_line, sy, sx, dy, dx, height, width);
2592 else if (info->var.bits_per_pixel == 4)
2593 atafb_iplan2p4_copyarea(info, par->next_line, sy, sx, dy, dx, height, width);
2594 else
2595 atafb_iplan2p8_copyarea(info, par->next_line, sy, sx, dy, dx, height, width);
2596
2597 return;
2598 }
2599
2600 static void atafb_imageblit(struct fb_info *info, const struct fb_image *image)
2601 {
2602 struct atafb_par *par = (struct atafb_par *)info->par;
2603 int x2, y2;
2604 unsigned long *dst;
2605 int dst_idx;
2606 const char *src;
2607 u32 dx, dy, width, height, pitch;
2608
2609 #ifdef ATAFB_FALCON
2610 if (info->var.bits_per_pixel == 16) {
2611 cfb_imageblit(info, image);
2612 return;
2613 }
2614 #endif
2615
2616 /*
2617 * We could use hardware clipping but on many cards you get around
2618 * hardware clipping by writing to framebuffer directly like we are
2619 * doing here.
2620 */
2621 x2 = image->dx + image->width;
2622 y2 = image->dy + image->height;
2623 dx = image->dx;
2624 dy = image->dy;
2625 x2 = x2 < info->var.xres_virtual ? x2 : info->var.xres_virtual;
2626 y2 = y2 < info->var.yres_virtual ? y2 : info->var.yres_virtual;
2627 width = x2 - dx;
2628 height = y2 - dy;
2629
2630 if (image->depth == 1) {
2631 // used for font data
2632 dst = (unsigned long *)
2633 ((unsigned long)info->screen_base & ~(BYTES_PER_LONG - 1));
2634 dst_idx = ((unsigned long)info->screen_base & (BYTES_PER_LONG - 1)) * 8;
2635 dst_idx += dy * par->next_line * 8 + dx;
2636 src = image->data;
2637 pitch = (image->width + 7) / 8;
2638 while (height--) {
2639
2640 if (info->var.bits_per_pixel == 1)
2641 atafb_mfb_linefill(info, par->next_line,
2642 dy, dx, width, src,
2643 image->bg_color, image->fg_color);
2644 else if (info->var.bits_per_pixel == 2)
2645 atafb_iplan2p2_linefill(info, par->next_line,
2646 dy, dx, width, src,
2647 image->bg_color, image->fg_color);
2648 else if (info->var.bits_per_pixel == 4)
2649 atafb_iplan2p4_linefill(info, par->next_line,
2650 dy, dx, width, src,
2651 image->bg_color, image->fg_color);
2652 else
2653 atafb_iplan2p8_linefill(info, par->next_line,
2654 dy, dx, width, src,
2655 image->bg_color, image->fg_color);
2656 dy++;
2657 src += pitch;
2658 }
2659 } else {
2660 c2p_iplan2(info->screen_base, image->data, dx, dy, width,
2661 height, par->next_line, image->width,
2662 info->var.bits_per_pixel);
2663 }
2664 }
2665
2666 static int
2667 atafb_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
2668 {
2669 switch (cmd) {
2670 #ifdef FBCMD_GET_CURRENTPAR
2671 case FBCMD_GET_CURRENTPAR:
2672 if (copy_to_user((void *)arg, (void *)&current_par,
2673 sizeof(struct atafb_par)))
2674 return -EFAULT;
2675 return 0;
2676 #endif
2677 #ifdef FBCMD_SET_CURRENTPAR
2678 case FBCMD_SET_CURRENTPAR:
2679 if (copy_from_user((void *)&current_par, (void *)arg,
2680 sizeof(struct atafb_par)))
2681 return -EFAULT;
2682 ata_set_par(&current_par);
2683 return 0;
2684 #endif
2685 }
2686 return -EINVAL;
2687 }
2688
2689 /* (un)blank/poweroff
2690 * 0 = unblank
2691 * 1 = blank
2692 * 2 = suspend vsync
2693 * 3 = suspend hsync
2694 * 4 = off
2695 */
2696 static int atafb_blank(int blank, struct fb_info *info)
2697 {
2698 unsigned short black[16];
2699 struct fb_cmap cmap;
2700 if (fbhw->blank && !fbhw->blank(blank))
2701 return 1;
2702 if (blank) {
2703 memset(black, 0, 16 * sizeof(unsigned short));
2704 cmap.red = black;
2705 cmap.green = black;
2706 cmap.blue = black;
2707 cmap.transp = NULL;
2708 cmap.start = 0;
2709 cmap.len = 16;
2710 fb_set_cmap(&cmap, info);
2711 }
2712 #if 0
2713 else
2714 do_install_cmap(info);
2715 #endif
2716 return 0;
2717 }
2718
2719 /*
2720 * New fbcon interface ...
2721 */
2722
2723 /* check var by decoding var into hw par, rounding if necessary,
2724 * then encoding hw par back into new, validated var */
2725 static int atafb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
2726 {
2727 int err;
2728 struct atafb_par par;
2729
2730 /* Validate wanted screen parameters */
2731 // if ((err = ata_decode_var(var, &par)))
2732 err = fbhw->decode_var(var, &par);
2733 if (err)
2734 return err;
2735
2736 /* Encode (possibly rounded) screen parameters */
2737 fbhw->encode_var(var, &par);
2738 return 0;
2739 }
2740
2741 /* actually set hw par by decoding var, then setting hardware from
2742 * hw par just decoded */
2743 static int atafb_set_par(struct fb_info *info)
2744 {
2745 struct atafb_par *par = (struct atafb_par *)info->par;
2746
2747 /* Decode wanted screen parameters */
2748 fbhw->decode_var(&info->var, par);
2749 mutex_lock(&info->mm_lock);
2750 fbhw->encode_fix(&info->fix, par);
2751 mutex_unlock(&info->mm_lock);
2752
2753 /* Set new videomode */
2754 ata_set_par(par);
2755
2756 return 0;
2757 }
2758
2759
2760 static struct fb_ops atafb_ops = {
2761 .owner = THIS_MODULE,
2762 .fb_check_var = atafb_check_var,
2763 .fb_set_par = atafb_set_par,
2764 .fb_setcolreg = atafb_setcolreg,
2765 .fb_blank = atafb_blank,
2766 .fb_pan_display = atafb_pan_display,
2767 .fb_fillrect = atafb_fillrect,
2768 .fb_copyarea = atafb_copyarea,
2769 .fb_imageblit = atafb_imageblit,
2770 .fb_ioctl = atafb_ioctl,
2771 };
2772
2773 static void check_default_par(int detected_mode)
2774 {
2775 char default_name[10];
2776 int i;
2777 struct fb_var_screeninfo var;
2778 unsigned long min_mem;
2779
2780 /* First try the user supplied mode */
2781 if (default_par) {
2782 var = atafb_predefined[default_par - 1];
2783 var.activate = FB_ACTIVATE_TEST;
2784 if (do_fb_set_var(&var, 1))
2785 default_par = 0; /* failed */
2786 }
2787 /* Next is the autodetected one */
2788 if (!default_par) {
2789 var = atafb_predefined[detected_mode - 1]; /* autodetect */
2790 var.activate = FB_ACTIVATE_TEST;
2791 if (!do_fb_set_var(&var, 1))
2792 default_par = detected_mode;
2793 }
2794 /* If that also failed, try some default modes... */
2795 if (!default_par) {
2796 /* try default1, default2... */
2797 for (i = 1; i < 10; i++) {
2798 sprintf(default_name,"default%d", i);
2799 default_par = get_video_mode(default_name);
2800 if (!default_par)
2801 panic("can't set default video mode");
2802 var = atafb_predefined[default_par - 1];
2803 var.activate = FB_ACTIVATE_TEST;
2804 if (!do_fb_set_var(&var,1))
2805 break; /* ok */
2806 }
2807 }
2808 min_mem = var.xres_virtual * var.yres_virtual * var.bits_per_pixel / 8;
2809 if (default_mem_req < min_mem)
2810 default_mem_req = min_mem;
2811 }
2812
2813 #ifdef ATAFB_EXT
2814 static void __init atafb_setup_ext(char *spec)
2815 {
2816 int xres, xres_virtual, yres, depth, planes;
2817 unsigned long addr, len;
2818 char *p;
2819
2820 /* Format is: <xres>;<yres>;<depth>;<plane organ.>;
2821 * <screen mem addr>
2822 * [;<screen mem length>[;<vgaiobase>[;<bits-per-col>[;<colorreg-type>
2823 * [;<xres-virtual>]]]]]
2824 *
2825 * 09/23/97 Juergen
2826 * <xres_virtual>: hardware's x-resolution (f.e. ProMST)
2827 *
2828 * Even xres_virtual is available, we neither support panning nor hw-scrolling!
2829 */
2830 p = strsep(&spec, ";");
2831 if (!p || !*p)
2832 return;
2833 xres_virtual = xres = simple_strtoul(p, NULL, 10);
2834 if (xres <= 0)
2835 return;
2836
2837 p = strsep(&spec, ";");
2838 if (!p || !*p)
2839 return;
2840 yres = simple_strtoul(p, NULL, 10);
2841 if (yres <= 0)
2842 return;
2843
2844 p = strsep(&spec, ";");
2845 if (!p || !*p)
2846 return;
2847 depth = simple_strtoul(p, NULL, 10);
2848 if (depth != 1 && depth != 2 && depth != 4 && depth != 8 &&
2849 depth != 16 && depth != 24)
2850 return;
2851
2852 p = strsep(&spec, ";");
2853 if (!p || !*p)
2854 return;
2855 if (*p == 'i')
2856 planes = FB_TYPE_INTERLEAVED_PLANES;
2857 else if (*p == 'p')
2858 planes = FB_TYPE_PACKED_PIXELS;
2859 else if (*p == 'n')
2860 planes = FB_TYPE_PLANES;
2861 else if (*p == 't')
2862 planes = -1; /* true color */
2863 else
2864 return;
2865
2866 p = strsep(&spec, ";");
2867 if (!p || !*p)
2868 return;
2869 addr = simple_strtoul(p, NULL, 0);
2870
2871 p = strsep(&spec, ";");
2872 if (!p || !*p)
2873 len = xres * yres * depth / 8;
2874 else
2875 len = simple_strtoul(p, NULL, 0);
2876
2877 p = strsep(&spec, ";");
2878 if (p && *p)
2879 external_vgaiobase = simple_strtoul(p, NULL, 0);
2880
2881 p = strsep(&spec, ";");
2882 if (p && *p) {
2883 external_bitspercol = simple_strtoul(p, NULL, 0);
2884 if (external_bitspercol > 8)
2885 external_bitspercol = 8;
2886 else if (external_bitspercol < 1)
2887 external_bitspercol = 1;
2888 }
2889
2890 p = strsep(&spec, ";");
2891 if (p && *p) {
2892 if (!strcmp(p, "vga"))
2893 external_card_type = IS_VGA;
2894 if (!strcmp(p, "mv300"))
2895 external_card_type = IS_MV300;
2896 }
2897
2898 p = strsep(&spec, ";");
2899 if (p && *p) {
2900 xres_virtual = simple_strtoul(p, NULL, 10);
2901 if (xres_virtual < xres)
2902 xres_virtual = xres;
2903 if (xres_virtual * yres * depth / 8 > len)
2904 len = xres_virtual * yres * depth / 8;
2905 }
2906
2907 external_xres = xres;
2908 external_xres_virtual = xres_virtual;
2909 external_yres = yres;
2910 external_depth = depth;
2911 external_pmode = planes;
2912 external_addr = (void *)addr;
2913 external_len = len;
2914
2915 if (external_card_type == IS_MV300) {
2916 switch (external_depth) {
2917 case 1:
2918 MV300_reg = MV300_reg_1bit;
2919 break;
2920 case 4:
2921 MV300_reg = MV300_reg_4bit;
2922 break;
2923 case 8:
2924 MV300_reg = MV300_reg_8bit;
2925 break;
2926 }
2927 }
2928 }
2929 #endif /* ATAFB_EXT */
2930
2931 static void __init atafb_setup_int(char *spec)
2932 {
2933 /* Format to config extended internal video hardware like OverScan:
2934 * "internal:<xres>;<yres>;<xres_max>;<yres_max>;<offset>"
2935 * Explanation:
2936 * <xres>: x-resolution
2937 * <yres>: y-resolution
2938 * The following are only needed if you have an overscan which
2939 * needs a black border:
2940 * <xres_max>: max. length of a line in pixels your OverScan hardware would allow
2941 * <yres_max>: max. number of lines your OverScan hardware would allow
2942 * <offset>: Offset from physical beginning to visible beginning
2943 * of screen in bytes
2944 */
2945 int xres;
2946 char *p;
2947
2948 if (!(p = strsep(&spec, ";")) || !*p)
2949 return;
2950 xres = simple_strtoul(p, NULL, 10);
2951 if (!(p = strsep(&spec, ";")) || !*p)
2952 return;
2953 sttt_xres = xres;
2954 tt_yres = st_yres = simple_strtoul(p, NULL, 10);
2955 if ((p = strsep(&spec, ";")) && *p)
2956 sttt_xres_virtual = simple_strtoul(p, NULL, 10);
2957 if ((p = strsep(&spec, ";")) && *p)
2958 sttt_yres_virtual = simple_strtoul(p, NULL, 0);
2959 if ((p = strsep(&spec, ";")) && *p)
2960 ovsc_offset = simple_strtoul(p, NULL, 0);
2961
2962 if (ovsc_offset || (sttt_yres_virtual != st_yres))
2963 use_hwscroll = 0;
2964 }
2965
2966 #ifdef ATAFB_FALCON
2967 static void __init atafb_setup_mcap(char *spec)
2968 {
2969 char *p;
2970 int vmin, vmax, hmin, hmax;
2971
2972 /* Format for monitor capabilities is: <Vmin>;<Vmax>;<Hmin>;<Hmax>
2973 * <V*> vertical freq. in Hz
2974 * <H*> horizontal freq. in kHz
2975 */
2976 if (!(p = strsep(&spec, ";")) || !*p)
2977 return;
2978 vmin = simple_strtoul(p, NULL, 10);
2979 if (vmin <= 0)
2980 return;
2981 if (!(p = strsep(&spec, ";")) || !*p)
2982 return;
2983 vmax = simple_strtoul(p, NULL, 10);
2984 if (vmax <= 0 || vmax <= vmin)
2985 return;
2986 if (!(p = strsep(&spec, ";")) || !*p)
2987 return;
2988 hmin = 1000 * simple_strtoul(p, NULL, 10);
2989 if (hmin <= 0)
2990 return;
2991 if (!(p = strsep(&spec, "")) || !*p)
2992 return;
2993 hmax = 1000 * simple_strtoul(p, NULL, 10);
2994 if (hmax <= 0 || hmax <= hmin)
2995 return;
2996
2997 fb_info.monspecs.vfmin = vmin;
2998 fb_info.monspecs.vfmax = vmax;
2999 fb_info.monspecs.hfmin = hmin;
3000 fb_info.monspecs.hfmax = hmax;
3001 }
3002 #endif /* ATAFB_FALCON */
3003
3004 static void __init atafb_setup_user(char *spec)
3005 {
3006 /* Format of user defined video mode is: <xres>;<yres>;<depth>
3007 */
3008 char *p;
3009 int xres, yres, depth, temp;
3010
3011 p = strsep(&spec, ";");
3012 if (!p || !*p)
3013 return;
3014 xres = simple_strtoul(p, NULL, 10);
3015 p = strsep(&spec, ";");
3016 if (!p || !*p)
3017 return;
3018 yres = simple_strtoul(p, NULL, 10);
3019 p = strsep(&spec, "");
3020 if (!p || !*p)
3021 return;
3022 depth = simple_strtoul(p, NULL, 10);
3023 temp = get_video_mode("user0");
3024 if (temp) {
3025 default_par = temp;
3026 atafb_predefined[default_par - 1].xres = xres;
3027 atafb_predefined[default_par - 1].yres = yres;
3028 atafb_predefined[default_par - 1].bits_per_pixel = depth;
3029 }
3030 }
3031
3032 int __init atafb_setup(char *options)
3033 {
3034 char *this_opt;
3035 int temp;
3036
3037 if (!options || !*options)
3038 return 0;
3039
3040 while ((this_opt = strsep(&options, ",")) != NULL) {
3041 if (!*this_opt)
3042 continue;
3043 if ((temp = get_video_mode(this_opt))) {
3044 default_par = temp;
3045 mode_option = this_opt;
3046 } else if (!strcmp(this_opt, "inverse"))
3047 inverse = 1;
3048 else if (!strncmp(this_opt, "hwscroll_", 9)) {
3049 hwscroll = simple_strtoul(this_opt + 9, NULL, 10);
3050 if (hwscroll < 0)
3051 hwscroll = 0;
3052 if (hwscroll > 200)
3053 hwscroll = 200;
3054 }
3055 #ifdef ATAFB_EXT
3056 else if (!strcmp(this_opt, "mv300")) {
3057 external_bitspercol = 8;
3058 external_card_type = IS_MV300;
3059 } else if (!strncmp(this_opt, "external:", 9))
3060 atafb_setup_ext(this_opt + 9);
3061 #endif
3062 else if (!strncmp(this_opt, "internal:", 9))
3063 atafb_setup_int(this_opt + 9);
3064 #ifdef ATAFB_FALCON
3065 else if (!strncmp(this_opt, "eclock:", 7)) {
3066 fext.f = simple_strtoul(this_opt + 7, NULL, 10);
3067 /* external pixelclock in kHz --> ps */
3068 fext.t = 1000000000 / fext.f;
3069 fext.f *= 1000;
3070 } else if (!strncmp(this_opt, "monitorcap:", 11))
3071 atafb_setup_mcap(this_opt + 11);
3072 #endif
3073 else if (!strcmp(this_opt, "keep"))
3074 DontCalcRes = 1;
3075 else if (!strncmp(this_opt, "R", 1))
3076 atafb_setup_user(this_opt + 1);
3077 }
3078 return 0;
3079 }
3080
3081 int __init atafb_init(void)
3082 {
3083 int pad, detected_mode, error;
3084 unsigned int defmode = 0;
3085 unsigned long mem_req;
3086
3087 #ifndef MODULE
3088 char *option = NULL;
3089
3090 if (fb_get_options("atafb", &option))
3091 return -ENODEV;
3092 atafb_setup(option);
3093 #endif
3094 printk("atafb_init: start\n");
3095
3096 if (!MACH_IS_ATARI)
3097 return -ENODEV;
3098
3099 do {
3100 #ifdef ATAFB_EXT
3101 if (external_addr) {
3102 printk("atafb_init: initializing external hw\n");
3103 fbhw = &ext_switch;
3104 atafb_ops.fb_setcolreg = &ext_setcolreg;
3105 defmode = DEFMODE_EXT;
3106 break;
3107 }
3108 #endif
3109 #ifdef ATAFB_TT
3110 if (ATARIHW_PRESENT(TT_SHIFTER)) {
3111 printk("atafb_init: initializing TT hw\n");
3112 fbhw = &tt_switch;
3113 atafb_ops.fb_setcolreg = &tt_setcolreg;
3114 defmode = DEFMODE_TT;
3115 break;
3116 }
3117 #endif
3118 #ifdef ATAFB_FALCON
3119 if (ATARIHW_PRESENT(VIDEL_SHIFTER)) {
3120 printk("atafb_init: initializing Falcon hw\n");
3121 fbhw = &falcon_switch;
3122 atafb_ops.fb_setcolreg = &falcon_setcolreg;
3123 error = request_irq(IRQ_AUTO_4, falcon_vbl_switcher,
3124 IRQ_TYPE_PRIO,
3125 "framebuffer/modeswitch",
3126 falcon_vbl_switcher);
3127 if (error)
3128 return error;
3129 defmode = DEFMODE_F30;
3130 break;
3131 }
3132 #endif
3133 #ifdef ATAFB_STE
3134 if (ATARIHW_PRESENT(STND_SHIFTER) ||
3135 ATARIHW_PRESENT(EXTD_SHIFTER)) {
3136 printk("atafb_init: initializing ST/E hw\n");
3137 fbhw = &st_switch;
3138 atafb_ops.fb_setcolreg = &stste_setcolreg;
3139 defmode = DEFMODE_STE;
3140 break;
3141 }
3142 fbhw = &st_switch;
3143 atafb_ops.fb_setcolreg = &stste_setcolreg;
3144 printk("Cannot determine video hardware; defaulting to ST(e)\n");
3145 #else /* ATAFB_STE */
3146 /* no default driver included */
3147 /* Nobody will ever see this message :-) */
3148 panic("Cannot initialize video hardware");
3149 #endif
3150 } while (0);
3151
3152 /* Multisync monitor capabilities */
3153 /* Atari-TOS defaults if no boot option present */
3154 if (fb_info.monspecs.hfmin == 0) {
3155 fb_info.monspecs.hfmin = 31000;
3156 fb_info.monspecs.hfmax = 32000;
3157 fb_info.monspecs.vfmin = 58;
3158 fb_info.monspecs.vfmax = 62;
3159 }
3160
3161 detected_mode = fbhw->detect();
3162 check_default_par(detected_mode);
3163 #ifdef ATAFB_EXT
3164 if (!external_addr) {
3165 #endif /* ATAFB_EXT */
3166 mem_req = default_mem_req + ovsc_offset + ovsc_addlen;
3167 mem_req = PAGE_ALIGN(mem_req) + PAGE_SIZE;
3168 screen_base = atari_stram_alloc(mem_req, "atafb");
3169 if (!screen_base)
3170 panic("Cannot allocate screen memory");
3171 memset(screen_base, 0, mem_req);
3172 pad = -(unsigned long)screen_base & (PAGE_SIZE - 1);
3173 screen_base += pad;
3174 real_screen_base = screen_base + ovsc_offset;
3175 screen_len = (mem_req - pad - ovsc_offset) & PAGE_MASK;
3176 st_ovsc_switch();
3177 if (CPU_IS_040_OR_060) {
3178 /* On a '040+, the cache mode of video RAM must be set to
3179 * write-through also for internal video hardware! */
3180 cache_push(virt_to_phys(screen_base), screen_len);
3181 kernel_set_cachemode(screen_base, screen_len,
3182 IOMAP_WRITETHROUGH);
3183 }
3184 printk("atafb: screen_base %p real_screen_base %p screen_len %d\n",
3185 screen_base, real_screen_base, screen_len);
3186 #ifdef ATAFB_EXT
3187 } else {
3188 /* Map the video memory (physical address given) to somewhere
3189 * in the kernel address space.
3190 */
3191 external_addr = ioremap_writethrough((unsigned long)external_addr,
3192 external_len);
3193 if (external_vgaiobase)
3194 external_vgaiobase =
3195 (unsigned long)ioremap(external_vgaiobase, 0x10000);
3196 screen_base =
3197 real_screen_base = external_addr;
3198 screen_len = external_len & PAGE_MASK;
3199 memset (screen_base, 0, external_len);
3200 }
3201 #endif /* ATAFB_EXT */
3202
3203 // strcpy(fb_info.mode->name, "Atari Builtin ");
3204 fb_info.fbops = &atafb_ops;
3205 // try to set default (detected; requested) var
3206 do_fb_set_var(&atafb_predefined[default_par - 1], 1);
3207 // reads hw state into current par, which may not be sane yet
3208 ata_get_par(&current_par);
3209 fb_info.par = &current_par;
3210 // tries to read from HW which may not be initialized yet
3211 // so set sane var first, then call atafb_set_par
3212 atafb_get_var(&fb_info.var, &fb_info);
3213
3214 #ifdef ATAFB_FALCON
3215 fb_info.pseudo_palette = current_par.hw.falcon.pseudo_palette;
3216 #endif
3217 fb_info.flags = FBINFO_FLAG_DEFAULT;
3218
3219 if (!fb_find_mode(&fb_info.var, &fb_info, mode_option, atafb_modedb,
3220 NUM_TOTAL_MODES, &atafb_modedb[defmode],
3221 fb_info.var.bits_per_pixel)) {
3222 return -EINVAL;
3223 }
3224
3225 fb_videomode_to_modelist(atafb_modedb, NUM_TOTAL_MODES,
3226 &fb_info.modelist);
3227
3228 atafb_set_disp(&fb_info);
3229
3230 fb_alloc_cmap(&(fb_info.cmap), 1 << fb_info.var.bits_per_pixel, 0);
3231
3232
3233 printk("Determined %dx%d, depth %d\n",
3234 fb_info.var.xres, fb_info.var.yres, fb_info.var.bits_per_pixel);
3235 if ((fb_info.var.xres != fb_info.var.xres_virtual) ||
3236 (fb_info.var.yres != fb_info.var.yres_virtual))
3237 printk(" virtual %dx%d\n", fb_info.var.xres_virtual,
3238 fb_info.var.yres_virtual);
3239
3240 if (register_framebuffer(&fb_info) < 0) {
3241 #ifdef ATAFB_EXT
3242 if (external_addr) {
3243 iounmap(external_addr);
3244 external_addr = NULL;
3245 }
3246 if (external_vgaiobase) {
3247 iounmap((void*)external_vgaiobase);
3248 external_vgaiobase = 0;
3249 }
3250 #endif
3251 return -EINVAL;
3252 }
3253
3254 // FIXME: mode needs setting!
3255 //printk("fb%d: %s frame buffer device, using %dK of video memory\n",
3256 // fb_info.node, fb_info.mode->name, screen_len>>10);
3257 printk("fb%d: frame buffer device, using %dK of video memory\n",
3258 fb_info.node, screen_len >> 10);
3259
3260 /* TODO: This driver cannot be unloaded yet */
3261 return 0;
3262 }
3263
3264 module_init(atafb_init);
3265
3266 #ifdef MODULE
3267 MODULE_LICENSE("GPL");
3268
3269 int cleanup_module(void)
3270 {
3271 unregister_framebuffer(&fb_info);
3272 return atafb_deinit();
3273 }
3274 #endif /* MODULE */
Support for the Chinese Samsung S3C2440 based development boards