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m68k: Remove the BKL from sys_execve
[linux-2.6-block.git] / drivers / video / atafb.c
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1da177e4
LT		 1/*
2 * linux/drivers/video/atafb.c -- Atari builtin chipset frame buffer device
3 *
4 * Copyright (C) 1994 Martin Schaller & Roman Hodek
a1005012 5 *
1da177e4
LT		 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>
1da177e4
LT		 52#include <linux/errno.h>
53#include <linux/string.h>
54#include <linux/mm.h>
1da177e4
LT		 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>
84902b7a 61#include <linux/uaccess.h>
1da177e4
LT		 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
a1005012
MS		 73#include "c2p.h"
74#include "atafb.h"
1da177e4
LT		 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
a1005012
MS		 84 /*
85 * Interface to the world
86 */
87
88static int atafb_check_var(struct fb_var_screeninfo *var, struct fb_info *info);
89static int atafb_set_par(struct fb_info *info);
90static int atafb_setcolreg(unsigned int regno, unsigned int red, unsigned int green,
91 unsigned int blue, unsigned int transp,
92 struct fb_info *info);
93static int atafb_blank(int blank, struct fb_info *info);
94static int atafb_pan_display(struct fb_var_screeninfo *var,
95 struct fb_info *info);
96static void atafb_fillrect(struct fb_info *info,
97 const struct fb_fillrect *rect);
98static void atafb_copyarea(struct fb_info *info,
99 const struct fb_copyarea *region);
100static void atafb_imageblit(struct fb_info *info, const struct fb_image *image);
101static int atafb_ioctl(struct fb_info *info, unsigned int cmd,
102 unsigned long arg);
1da177e4 103
1da177e4 104
a1005012 105static int default_par; /* default resolution (0=none) */
1da177e4 106
a1005012
MS		 107static unsigned long default_mem_req;
108
109static int hwscroll = -1;
1da177e4
LT		 110
111static int use_hwscroll = 1;
112
a1005012
MS		 113static int sttt_xres = 640, st_yres = 400, tt_yres = 480;
114static int sttt_xres_virtual = 640, sttt_yres_virtual = 400;
115static int ovsc_offset, ovsc_addlen;
116
117 /*
118 * Hardware parameters for current mode
119 */
1da177e4
LT		 120
121static struct atafb_par {
122 void *screen_base;
123 int yres_virtual;
a1005012 124 u_long next_line;
1da177e4
LT		 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;
74511413 151 u32 pseudo_palette[16];
1da177e4
LT		 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) */
a1005012 161static int DontCalcRes = 0;
1da177e4
LT		 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
a1005012
MS		 186static struct fb_info fb_info = {
187 .fix = {
188 .id = "Atari ",
189 .visual = FB_VISUAL_PSEUDOCOLOR,
190 .accel = FB_ACCEL_NONE,
191 }
192};
1da177e4
LT		 193
194static void *screen_base; /* base address of screen */
195static void *real_screen_base; /* (only for Overscan) */
196
197static int screen_len;
198
a1005012 199static int current_par_valid;
1da177e4 200
a1005012 201static int mono_moni;
1da177e4
LT		 202
203
204#ifdef ATAFB_EXT
1da177e4 205
a1005012
MS		 206/* external video handling */
207static unsigned int external_xres;
208static unsigned int external_xres_virtual;
209static unsigned int external_yres;
1da177e4 210
a1005012
MS		 211/*
212 * not needed - atafb will never support panning/hardwarescroll with external
213 * static unsigned int external_yres_virtual;
214 */
215static unsigned int external_depth;
216static int external_pmode;
217static void *external_addr;
218static unsigned long external_len;
219static unsigned long external_vgaiobase;
220static unsigned int external_bitspercol = 6;
1da177e4 221
a1005012
MS		 222/*
223 * JOE <joe@amber.dinoco.de>:
224 * added card type for external driver, is only needed for
225 * colormap handling.
226 */
1da177e4
LT		 227enum cardtype { IS_VGA, IS_MV300 };
228static enum cardtype external_card_type = IS_VGA;
229
230/*
a1005012
MS		 231 * The MV300 mixes the color registers. So we need an array of munged
232 * indices in order to access the correct reg.
233 */
234static int MV300_reg_1bit[2] = {
235 0, 1
236};
237static int MV300_reg_4bit[16] = {
238 0, 8, 4, 12, 2, 10, 6, 14, 1, 9, 5, 13, 3, 11, 7, 15
239};
240static 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};
1da177e4
LT		 258
259static int *MV300_reg = MV300_reg_8bit;
1da177e4
LT		 260#endif /* ATAFB_EXT */
261
262
a1005012 263static int inverse;
1da177e4
LT		 264
265extern int fontheight_8x8;
266extern int fontwidth_8x8;
267extern unsigned char fontdata_8x8[];
268
269extern int fontheight_8x16;
270extern int fontwidth_8x16;
271extern unsigned char fontdata_8x16[];
272
a1005012
MS		 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);
a1005012
MS		 332 * } ;
333 */
334
335
1da177e4
LT		 336/* ++roman: This structure abstracts from the underlying hardware (ST(e),
337 * TT, or Falcon.
338 *
a1005012 339 * int (*detect)(void)
1da177e4
LT		 340 * This function should detect the current video mode settings and
341 * store them in atafb_predefined[0] for later reference by the
342 * user. Return the index+1 of an equivalent predefined mode or 0
343 * if there is no such.
a1005012
MS		 344 *
345 * int (*encode_fix)(struct fb_fix_screeninfo *fix,
346 * struct atafb_par *par)
1da177e4
LT		 347 * This function should fill in the 'fix' structure based on the
348 * values in the 'par' structure.
a1005012
MS		 349 * !!! Obsolete, perhaps !!!
350 *
351 * int (*decode_var)(struct fb_var_screeninfo *var,
352 * struct atafb_par *par)
1da177e4
LT		 353 * Get the video params out of 'var'. If a value doesn't fit, round
354 * it up, if it's too big, return EINVAL.
a1005012
MS		 355 * Round up in the following order: bits_per_pixel, xres, yres,
356 * xres_virtual, yres_virtual, xoffset, yoffset, grayscale, bitfields,
1da177e4
LT		 357 * horizontal timing, vertical timing.
358 *
a1005012
MS		 359 * int (*encode_var)(struct fb_var_screeninfo *var,
360 * struct atafb_par *par);
1da177e4
LT		 361 * Fill the 'var' structure based on the values in 'par' and maybe
362 * other values read out of the hardware.
a1005012
MS		 363 *
364 * void (*get_par)(struct atafb_par *par)
1da177e4 365 * Fill the hardware's 'par' structure.
a1005012
MS		 366 * !!! Used only by detect() !!!
367 *
368 * void (*set_par)(struct atafb_par *par)
1da177e4 369 * Set the hardware according to 'par'.
1da177e4
LT		 370 *
371 * void (*set_screen_base)(void *s_base)
372 * Set the base address of the displayed frame buffer. Only called
373 * if yres_virtual > yres or xres_virtual > xres.
374 *
a1005012
MS		 375 * int (*blank)(int blank_mode)
376 * Blank the screen if blank_mode != 0, else unblank. If blank == NULL then
1da177e4
LT		 377 * the caller blanks by setting the CLUT to all black. Return 0 if blanking
378 * succeeded, !=0 if un-/blanking failed due to e.g. a video mode which
379 * doesn't support it. Implements VESA suspend and powerdown modes on
380 * hardware that supports disabling hsync/vsync:
a1005012 381 * blank_mode == 2: suspend vsync, 3:suspend hsync, 4: powerdown.
1da177e4
LT		 382 */
383
384static struct fb_hwswitch {
a1005012
MS		 385 int (*detect)(void);
386 int (*encode_fix)(struct fb_fix_screeninfo *fix,
387 struct atafb_par *par);
388 int (*decode_var)(struct fb_var_screeninfo *var,
389 struct atafb_par *par);
390 int (*encode_var)(struct fb_var_screeninfo *var,
391 struct atafb_par *par);
392 void (*get_par)(struct atafb_par *par);
393 void (*set_par)(struct atafb_par *par);
1da177e4 394 void (*set_screen_base)(void *s_base);
a1005012
MS		 395 int (*blank)(int blank_mode);
396 int (*pan_display)(struct fb_var_screeninfo *var,
397 struct fb_info *info);
1da177e4
LT		 398} *fbhw;
399
a1005012
MS		 400static char *autodetect_names[] = { "autodetect", NULL };
401static char *stlow_names[] = { "stlow", NULL };
402static char *stmid_names[] = { "stmid", "default5", NULL };
403static char *sthigh_names[] = { "sthigh", "default4", NULL };
404static char *ttlow_names[] = { "ttlow", NULL };
405static char *ttmid_names[] = { "ttmid", "default1", NULL };
406static char *tthigh_names[] = { "tthigh", "default2", NULL };
407static char *vga2_names[] = { "vga2", NULL };
408static char *vga4_names[] = { "vga4", NULL };
409static char *vga16_names[] = { "vga16", "default3", NULL };
410static char *vga256_names[] = { "vga256", NULL };
411static char *falh2_names[] = { "falh2", NULL };
412static char *falh16_names[] = { "falh16", NULL };
1da177e4
LT		 413
414static char **fb_var_names[] = {
1da177e4
LT		 415 autodetect_names,
416 stlow_names,
417 stmid_names,
418 sthigh_names,
419 ttlow_names,
420 ttmid_names,
421 tthigh_names,
422 vga2_names,
423 vga4_names,
424 vga16_names,
425 vga256_names,
426 falh2_names,
427 falh16_names,
428 NULL
1da177e4
LT		 429};
430
431static struct fb_var_screeninfo atafb_predefined[] = {
a1005012
MS		 432 /*
433 * yres_virtual == 0 means use hw-scrolling if possible, else yres
434 */
435 { /* autodetect */
436 0, 0, 0, 0, 0, 0, 0, 0, /* xres-grayscale */
437 {0, 0, 0}, {0, 0, 0}, {0, 0, 0}, {0, 0, 0}, /* red green blue tran*/
1da177e4 438 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
a1005012 439 { /* st low */
1da177e4
LT		 440 320, 200, 320, 0, 0, 0, 4, 0,
441 {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
442 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
443 { /* st mid */
444 640, 200, 640, 0, 0, 0, 2, 0,
445 {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
446 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
447 { /* st high */
448 640, 400, 640, 0, 0, 0, 1, 0,
449 {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
450 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
451 { /* tt low */
452 320, 480, 320, 0, 0, 0, 8, 0,
453 {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
454 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
455 { /* tt mid */
456 640, 480, 640, 0, 0, 0, 4, 0,
457 {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
458 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
459 { /* tt high */
460 1280, 960, 1280, 0, 0, 0, 1, 0,
461 {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
462 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
463 { /* vga2 */
464 640, 480, 640, 0, 0, 0, 1, 0,
465 {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
466 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
467 { /* vga4 */
468 640, 480, 640, 0, 0, 0, 2, 0,
469 {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
470 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
471 { /* vga16 */
472 640, 480, 640, 0, 0, 0, 4, 0,
473 {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
474 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
475 { /* vga256 */
476 640, 480, 640, 0, 0, 0, 8, 0,
477 {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
478 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
479 { /* falh2 */
480 896, 608, 896, 0, 0, 0, 1, 0,
481 {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
482 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
483 { /* falh16 */
484 896, 608, 896, 0, 0, 0, 4, 0,
485 {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
486 0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
487};
488
a1005012 489static int num_atafb_predefined = ARRAY_SIZE(atafb_predefined);
1da177e4 490
a1005012
MS		 491static struct fb_videomode atafb_modedb[] __initdata = {
492 /*
493 * Atari Video Modes
494 *
495 * If you change these, make sure to update DEFMODE_* as well!
496 */
1da177e4 497
a1005012
MS		 498 /*
499 * ST/TT Video Modes
500 */
501
502 {
503 /* 320x200, 15 kHz, 60 Hz (ST low) */
504 "st-low", 60, 320, 200, 32000, 32, 16, 31, 14, 96, 4,
505 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
506 }, {
507 /* 640x200, 15 kHz, 60 Hz (ST medium) */
508 "st-mid", 60, 640, 200, 32000, 32, 16, 31, 14, 96, 4,
509 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
510 }, {
511 /* 640x400, 30.25 kHz, 63.5 Hz (ST high) */
512 "st-high", 63, 640, 400, 32000, 128, 0, 40, 14, 128, 4,
513 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
514 }, {
515 /* 320x480, 15 kHz, 60 Hz (TT low) */
516 "tt-low", 60, 320, 480, 31041, 120, 100, 8, 16, 140, 30,
517 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
518 }, {
519 /* 640x480, 29 kHz, 57 Hz (TT medium) */
520 "tt-mid", 60, 640, 480, 31041, 120, 100, 8, 16, 140, 30,
521 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
522 }, {
523 /* 1280x960, 29 kHz, 60 Hz (TT high) */
524 "tt-high", 57, 640, 960, 31041, 120, 100, 8, 16, 140, 30,
525 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
526 },
527
528 /*
529 * VGA Video Modes
530 */
531
532 {
533 /* 640x480, 31 kHz, 60 Hz (VGA) */
534 "vga", 63.5, 640, 480, 32000, 18, 42, 31, 11, 96, 3,
535 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
536 }, {
537 /* 640x400, 31 kHz, 70 Hz (VGA) */
538 "vga70", 70, 640, 400, 32000, 18, 42, 31, 11, 96, 3,
539 FB_SYNC_VERT_HIGH_ACT | FB_SYNC_COMP_HIGH_ACT, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
540 },
541
542 /*
543 * Falcon HiRes Video Modes
544 */
545
546 {
547 /* 896x608, 31 kHz, 60 Hz (Falcon High) */
548 "falh", 60, 896, 608, 32000, 18, 42, 31, 1, 96,3,
549 0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
550 },
551};
552
553#define NUM_TOTAL_MODES ARRAY_SIZE(atafb_modedb)
554
555static char *mode_option __initdata = NULL;
556
557 /* default modes */
558
559#define DEFMODE_TT 5 /* "tt-high" for TT */
560#define DEFMODE_F30 7 /* "vga70" for Falcon */
561#define DEFMODE_STE 2 /* "st-high" for ST/E */
562#define DEFMODE_EXT 6 /* "vga" for external */
563
564
565static int get_video_mode(char *vname)
1da177e4 566{
a1005012
MS		 567 char ***name_list;
568 char **name;
569 int i;
570
571 name_list = fb_var_names;
572 for (i = 0; i < num_atafb_predefined; i++) {
573 name = *name_list++;
574 if (!name || !*name)
575 break;
576 while (*name) {
577 if (!strcmp(vname, *name))
578 return i + 1;
579 name++;
580 }
1da177e4 581 }
a1005012 582 return 0;
1da177e4
LT		 583}
584
585
586
587/* ------------------- TT specific functions ---------------------- */
588
589#ifdef ATAFB_TT
590
a1005012 591static int tt_encode_fix(struct fb_fix_screeninfo *fix, struct atafb_par *par)
1da177e4
LT		 592{
593 int mode;
594
a1005012 595 strcpy(fix->id, "Atari Builtin");
1da177e4
LT		 596 fix->smem_start = (unsigned long)real_screen_base;
597 fix->smem_len = screen_len;
a1005012
MS		 598 fix->type = FB_TYPE_INTERLEAVED_PLANES;
599 fix->type_aux = 2;
600 fix->visual = FB_VISUAL_PSEUDOCOLOR;
1da177e4
LT		 601 mode = par->hw.tt.mode & TT_SHIFTER_MODEMASK;
602 if (mode == TT_SHIFTER_TTHIGH || mode == TT_SHIFTER_STHIGH) {
a1005012
MS		 603 fix->type = FB_TYPE_PACKED_PIXELS;
604 fix->type_aux = 0;
1da177e4 605 if (mode == TT_SHIFTER_TTHIGH)
a1005012 606 fix->visual = FB_VISUAL_MONO01;
1da177e4 607 }
a1005012
MS		 608 fix->xpanstep = 0;
609 fix->ypanstep = 1;
610 fix->ywrapstep = 0;
02603930 611 fix->line_length = par->next_line;
1da177e4
LT		 612 fix->accel = FB_ACCEL_ATARIBLITT;
613 return 0;
614}
615
a1005012 616static int tt_decode_var(struct fb_var_screeninfo *var, struct atafb_par *par)
1da177e4 617{
a1005012
MS		 618 int xres = var->xres;
619 int yres = var->yres;
620 int bpp = var->bits_per_pixel;
1da177e4
LT		 621 int linelen;
622 int yres_virtual = var->yres_virtual;
623
624 if (mono_moni) {
a1005012 625 if (bpp > 1 || xres > sttt_xres * 2 || yres > tt_yres * 2)
1da177e4 626 return -EINVAL;
a1005012
MS		 627 par->hw.tt.mode = TT_SHIFTER_TTHIGH;
628 xres = sttt_xres * 2;
629 yres = tt_yres * 2;
630 bpp = 1;
1da177e4
LT		 631 } else {
632 if (bpp > 8 || xres > sttt_xres || yres > tt_yres)
633 return -EINVAL;
634 if (bpp > 4) {
a1005012 635 if (xres > sttt_xres / 2 || yres > tt_yres)
1da177e4 636 return -EINVAL;
a1005012
MS		 637 par->hw.tt.mode = TT_SHIFTER_TTLOW;
638 xres = sttt_xres / 2;
639 yres = tt_yres;
640 bpp = 8;
641 } else if (bpp > 2) {
1da177e4
LT		 642 if (xres > sttt_xres || yres > tt_yres)
643 return -EINVAL;
a1005012
MS		 644 if (xres > sttt_xres / 2 || yres > st_yres / 2) {
645 par->hw.tt.mode = TT_SHIFTER_TTMID;
646 xres = sttt_xres;
647 yres = tt_yres;
648 bpp = 4;
649 } else {
650 par->hw.tt.mode = TT_SHIFTER_STLOW;
651 xres = sttt_xres / 2;
652 yres = st_yres / 2;
653 bpp = 4;
1da177e4 654 }
a1005012
MS		 655 } else if (bpp > 1) {
656 if (xres > sttt_xres || yres > st_yres / 2)
1da177e4 657 return -EINVAL;
a1005012
MS		 658 par->hw.tt.mode = TT_SHIFTER_STMID;
659 xres = sttt_xres;
660 yres = st_yres / 2;
661 bpp = 2;
662 } else if (var->xres > sttt_xres || var->yres > st_yres) {
1da177e4 663 return -EINVAL;
a1005012
MS		 664 } else {
665 par->hw.tt.mode = TT_SHIFTER_STHIGH;
666 xres = sttt_xres;
667 yres = st_yres;
668 bpp = 1;
1da177e4
LT		 669 }
670 }
671 if (yres_virtual <= 0)
672 yres_virtual = 0;
673 else if (yres_virtual < yres)
674 yres_virtual = yres;
675 if (var->sync & FB_SYNC_EXT)
a1005012 676 par->hw.tt.sync = 0;
1da177e4 677 else
a1005012
MS		 678 par->hw.tt.sync = 1;
679 linelen = xres * bpp / 8;
1da177e4
LT		 680 if (yres_virtual * linelen > screen_len && screen_len)
681 return -EINVAL;
682 if (yres * linelen > screen_len && screen_len)
683 return -EINVAL;
684 if (var->yoffset + yres > yres_virtual && yres_virtual)
685 return -EINVAL;
686 par->yres_virtual = yres_virtual;
687 par->screen_base = screen_base + var->yoffset * linelen;
02603930 688 par->next_line = linelen;
1da177e4
LT		 689 return 0;
690}
691
a1005012 692static int tt_encode_var(struct fb_var_screeninfo *var, struct atafb_par *par)
1da177e4
LT		 693{
694 int linelen;
695 memset(var, 0, sizeof(struct fb_var_screeninfo));
a1005012
MS		 696 var->red.offset = 0;
697 var->red.length = 4;
698 var->red.msb_right = 0;
699 var->grayscale = 0;
700
701 var->pixclock = 31041;
702 var->left_margin = 120; /* these may be incorrect */
703 var->right_margin = 100;
704 var->upper_margin = 8;
705 var->lower_margin = 16;
706 var->hsync_len = 140;
707 var->vsync_len = 30;
708
709 var->height = -1;
710 var->width = -1;
1da177e4
LT		 711
712 if (par->hw.tt.sync & 1)
a1005012 713 var->sync = 0;
1da177e4 714 else
a1005012 715 var->sync = FB_SYNC_EXT;
1da177e4
LT		 716
717 switch (par->hw.tt.mode & TT_SHIFTER_MODEMASK) {
718 case TT_SHIFTER_STLOW:
a1005012
MS		 719 var->xres = sttt_xres / 2;
720 var->xres_virtual = sttt_xres_virtual / 2;
721 var->yres = st_yres / 2;
722 var->bits_per_pixel = 4;
1da177e4
LT		 723 break;
724 case TT_SHIFTER_STMID:
a1005012
MS		 725 var->xres = sttt_xres;
726 var->xres_virtual = sttt_xres_virtual;
727 var->yres = st_yres / 2;
728 var->bits_per_pixel = 2;
1da177e4
LT		 729 break;
730 case TT_SHIFTER_STHIGH:
a1005012
MS		 731 var->xres = sttt_xres;
732 var->xres_virtual = sttt_xres_virtual;
733 var->yres = st_yres;
734 var->bits_per_pixel = 1;
1da177e4
LT		 735 break;
736 case TT_SHIFTER_TTLOW:
a1005012
MS		 737 var->xres = sttt_xres / 2;
738 var->xres_virtual = sttt_xres_virtual / 2;
739 var->yres = tt_yres;
740 var->bits_per_pixel = 8;
1da177e4
LT		 741 break;
742 case TT_SHIFTER_TTMID:
a1005012
MS		 743 var->xres = sttt_xres;
744 var->xres_virtual = sttt_xres_virtual;
745 var->yres = tt_yres;
746 var->bits_per_pixel = 4;
1da177e4
LT		 747 break;
748 case TT_SHIFTER_TTHIGH:
a1005012
MS		 749 var->red.length = 0;
750 var->xres = sttt_xres * 2;
751 var->xres_virtual = sttt_xres_virtual * 2;
752 var->yres = tt_yres * 2;
753 var->bits_per_pixel = 1;
1da177e4 754 break;
a1005012
MS		 755 }
756 var->blue = var->green = var->red;
757 var->transp.offset = 0;
758 var->transp.length = 0;
759 var->transp.msb_right = 0;
760 linelen = var->xres_virtual * var->bits_per_pixel / 8;
761 if (!use_hwscroll)
762 var->yres_virtual = var->yres;
1da177e4
LT		 763 else if (screen_len) {
764 if (par->yres_virtual)
765 var->yres_virtual = par->yres_virtual;
766 else
a1005012 767 /* yres_virtual == 0 means use maximum */
1da177e4
LT		 768 var->yres_virtual = screen_len / linelen;
769 } else {
770 if (hwscroll < 0)
771 var->yres_virtual = 2 * var->yres;
772 else
a1005012 773 var->yres_virtual = var->yres + hwscroll * 16;
1da177e4 774 }
a1005012 775 var->xoffset = 0;
1da177e4 776 if (screen_base)
a1005012 777 var->yoffset = (par->screen_base - screen_base) / linelen;
1da177e4 778 else
a1005012
MS		 779 var->yoffset = 0;
780 var->nonstd = 0;
781 var->activate = 0;
782 var->vmode = FB_VMODE_NONINTERLACED;
1da177e4
LT		 783 return 0;
784}
785
a1005012 786static void tt_get_par(struct atafb_par *par)
1da177e4
LT		 787{
788 unsigned long addr;
a1005012
MS		 789 par->hw.tt.mode = shifter_tt.tt_shiftmode;
790 par->hw.tt.sync = shifter.syncmode;
1da177e4
LT		 791 addr = ((shifter.bas_hi & 0xff) << 16) |
792 ((shifter.bas_md & 0xff) << 8) |
793 ((shifter.bas_lo & 0xff));
794 par->screen_base = phys_to_virt(addr);
795}
796
a1005012 797static void tt_set_par(struct atafb_par *par)
1da177e4 798{
a1005012
MS		 799 shifter_tt.tt_shiftmode = par->hw.tt.mode;
800 shifter.syncmode = par->hw.tt.sync;
1da177e4
LT		 801 /* only set screen_base if really necessary */
802 if (current_par.screen_base != par->screen_base)
803 fbhw->set_screen_base(par->screen_base);
804}
805
a1005012
MS		 806static int tt_setcolreg(unsigned int regno, unsigned int red,
807 unsigned int green, unsigned int blue,
808 unsigned int transp, struct fb_info *info)
1da177e4
LT		 809{
810 if ((shifter_tt.tt_shiftmode & TT_SHIFTER_MODEMASK) == TT_SHIFTER_STHIGH)
811 regno += 254;
812 if (regno > 255)
813 return 1;
814 tt_palette[regno] = (((red >> 12) << 8) | ((green >> 12) << 4) |
815 (blue >> 12));
816 if ((shifter_tt.tt_shiftmode & TT_SHIFTER_MODEMASK) ==
a1005012 817 TT_SHIFTER_STHIGH && regno == 254)
1da177e4
LT		 818 tt_palette[0] = 0;
819 return 0;
820}
821
a1005012
MS		 822static int tt_detect(void)
823{
824 struct atafb_par par;
1da177e4
LT		 825
826 /* Determine the connected monitor: The DMA sound must be
827 * disabled before reading the MFP GPIP, because the Sound
828 * Done Signal and the Monochrome Detect are XORed together!
829 *
830 * Even on a TT, we should look if there is a DMA sound. It was
831 * announced that the Eagle is TT compatible, but only the PCM is
832 * missing...
833 */
a1005012 834 if (ATARIHW_PRESENT(PCM_8BIT)) {
1da177e4 835 tt_dmasnd.ctrl = DMASND_CTRL_OFF;
a1005012 836 udelay(20); /* wait a while for things to settle down */
1da177e4 837 }
3d92e8f3 838 mono_moni = (st_mfp.par_dt_reg & 0x80) == 0;
1da177e4
LT		 839
840 tt_get_par(&par);
841 tt_encode_var(&atafb_predefined[0], &par);
842
843 return 1;
844}
845
846#endif /* ATAFB_TT */
847
848/* ------------------- Falcon specific functions ---------------------- */
849
850#ifdef ATAFB_FALCON
851
852static int mon_type; /* Falcon connected monitor */
853static int f030_bus_width; /* Falcon ram bus width (for vid_control) */
854#define F_MON_SM 0
855#define F_MON_SC 1
856#define F_MON_VGA 2
857#define F_MON_TV 3
858
859static struct pixel_clock {
860 unsigned long f; /* f/[Hz] */
861 unsigned long t; /* t/[ps] (=1/f) */
862 int right, hsync, left; /* standard timing in clock cycles, not pixel */
a1005012 863 /* hsync initialized in falcon_detect() */
1da177e4
LT		 864 int sync_mask; /* or-mask for hw.falcon.sync to set this clock */
865 int control_mask; /* ditto, for hw.falcon.vid_control */
a1005012
MS		 866} f25 = {
867 25175000, 39721, 18, 0, 42, 0x0, VCO_CLOCK25
868}, f32 = {
869 32000000, 31250, 18, 0, 42, 0x0, 0
870}, fext = {
871 0, 0, 18, 0, 42, 0x1, 0
872};
1da177e4
LT		 873
874/* VIDEL-prescale values [mon_type][pixel_length from VCO] */
a1005012
MS		 875static int vdl_prescale[4][3] = {
876 { 4,2,1 }, { 4,2,1 }, { 4,2,2 }, { 4,2,1 }
877};
1da177e4
LT		 878
879/* Default hsync timing [mon_type] in picoseconds */
a1005012 880static long h_syncs[4] = { 3000000, 4875000, 4000000, 4875000 };
1da177e4 881
1da177e4
LT		 882static inline int hxx_prescale(struct falcon_hw *hw)
883{
a1005012
MS		 884 return hw->ste_mode ? 16
885 : vdl_prescale[mon_type][hw->vid_mode >> 2 & 0x3];
1da177e4
LT		 886}
887
a1005012
MS		 888static int falcon_encode_fix(struct fb_fix_screeninfo *fix,
889 struct atafb_par *par)
1da177e4
LT		 890{
891 strcpy(fix->id, "Atari Builtin");
892 fix->smem_start = (unsigned long)real_screen_base;
893 fix->smem_len = screen_len;
894 fix->type = FB_TYPE_INTERLEAVED_PLANES;
895 fix->type_aux = 2;
896 fix->visual = FB_VISUAL_PSEUDOCOLOR;
897 fix->xpanstep = 1;
898 fix->ypanstep = 1;
899 fix->ywrapstep = 0;
900 if (par->hw.falcon.mono) {
901 fix->type = FB_TYPE_PACKED_PIXELS;
902 fix->type_aux = 0;
903 /* no smooth scrolling with longword aligned video mem */
904 fix->xpanstep = 32;
a1005012 905 } else if (par->hw.falcon.f_shift & 0x100) {
1da177e4
LT		 906 fix->type = FB_TYPE_PACKED_PIXELS;
907 fix->type_aux = 0;
908 /* Is this ok or should it be DIRECTCOLOR? */
909 fix->visual = FB_VISUAL_TRUECOLOR;
910 fix->xpanstep = 2;
911 }
02603930 912 fix->line_length = par->next_line;
1da177e4
LT		 913 fix->accel = FB_ACCEL_ATARIBLITT;
914 return 0;
915}
916
a1005012
MS		 917static int falcon_decode_var(struct fb_var_screeninfo *var,
918 struct atafb_par *par)
1da177e4
LT		 919{
920 int bpp = var->bits_per_pixel;
921 int xres = var->xres;
922 int yres = var->yres;
923 int xres_virtual = var->xres_virtual;
924 int yres_virtual = var->yres_virtual;
925 int left_margin, right_margin, hsync_len;
926 int upper_margin, lower_margin, vsync_len;
927 int linelen;
928 int interlace = 0, doubleline = 0;
929 struct pixel_clock *pclock;
a1005012 930 int plen; /* width of pixel in clock cycles */
1da177e4
LT		 931 int xstretch;
932 int prescale;
933 int longoffset = 0;
934 int hfreq, vfreq;
a1005012
MS		 935 int hdb_off, hde_off, base_off;
936 int gstart, gend1, gend2, align;
1da177e4
LT		 937
938/*
939 Get the video params out of 'var'. If a value doesn't fit, round
940 it up, if it's too big, return EINVAL.
a1005012
MS		 941 Round up in the following order: bits_per_pixel, xres, yres,
942 xres_virtual, yres_virtual, xoffset, yoffset, grayscale, bitfields,
1da177e4
LT		 943 horizontal timing, vertical timing.
944
945 There is a maximum of screen resolution determined by pixelclock
946 and minimum frame rate -- (X+hmarg.)*(Y+vmarg.)*vfmin <= pixelclock.
947 In interlace mode this is " * " *vfmin <= pixelclock.
948 Additional constraints: hfreq.
949 Frequency range for multisync monitors is given via command line.
950 For TV and SM124 both frequencies are fixed.
951
a1005012 952 X % 16 == 0 to fit 8x?? font (except 1 bitplane modes must use X%32 == 0)
1da177e4
LT		 953 Y % 16 == 0 to fit 8x16 font
954 Y % 8 == 0 if Y<400
955
a1005012 956 Currently interlace and doubleline mode in var are ignored.
1da177e4
LT		 957 On SM124 and TV only the standard resolutions can be used.
958*/
959
960 /* Reject uninitialized mode */
961 if (!xres || !yres || !bpp)
962 return -EINVAL;
963
a1005012 964 if (mon_type == F_MON_SM && bpp != 1)
1da177e4 965 return -EINVAL;
a1005012
MS		 966
967 if (bpp <= 1) {
1da177e4
LT		 968 bpp = 1;
969 par->hw.falcon.f_shift = 0x400;
970 par->hw.falcon.st_shift = 0x200;
a1005012 971 } else if (bpp <= 2) {
1da177e4
LT		 972 bpp = 2;
973 par->hw.falcon.f_shift = 0x000;
974 par->hw.falcon.st_shift = 0x100;
a1005012 975 } else if (bpp <= 4) {
1da177e4
LT		 976 bpp = 4;
977 par->hw.falcon.f_shift = 0x000;
978 par->hw.falcon.st_shift = 0x000;
a1005012 979 } else if (bpp <= 8) {
1da177e4
LT		 980 bpp = 8;
981 par->hw.falcon.f_shift = 0x010;
a1005012
MS		 982 } else if (bpp <= 16) {
983 bpp = 16; /* packed pixel mode */
984 par->hw.falcon.f_shift = 0x100; /* hicolor, no overlay */
985 } else
1da177e4
LT		 986 return -EINVAL;
987 par->hw.falcon.bpp = bpp;
988
989 if (mon_type == F_MON_SM || DontCalcRes) {
990 /* Skip all calculations. VGA/TV/SC1224 only supported. */
991 struct fb_var_screeninfo *myvar = &atafb_predefined[0];
a1005012 992
1da177e4 993 if (bpp > myvar->bits_per_pixel ||
a1005012
MS		 994 var->xres > myvar->xres ||
995 var->yres > myvar->yres)
1da177e4
LT		 996 return -EINVAL;
997 fbhw->get_par(par); /* Current par will be new par */
998 goto set_screen_base; /* Don't forget this */
999 }
1000
1001 /* Only some fixed resolutions < 640x400 */
1002 if (xres <= 320)
1003 xres = 320;
1004 else if (xres <= 640 && bpp != 16)
1005 xres = 640;
1006 if (yres <= 200)
1007 yres = 200;
1008 else if (yres <= 240)
1009 yres = 240;
1010 else if (yres <= 400)
1011 yres = 400;
1012
1013 /* 2 planes must use STE compatibility mode */
a1005012
MS		 1014 par->hw.falcon.ste_mode = bpp == 2;
1015 par->hw.falcon.mono = bpp == 1;
1da177e4
LT		 1016
1017 /* Total and visible scanline length must be a multiple of one longword,
1018 * this and the console fontwidth yields the alignment for xres and
1019 * xres_virtual.
1020 * TODO: this way "odd" fontheights are not supported
1021 *
1022 * Special case in STE mode: blank and graphic positions don't align,
1023 * avoid trash at right margin
1024 */
1025 if (par->hw.falcon.ste_mode)
1026 xres = (xres + 63) & ~63;
1027 else if (bpp == 1)
1028 xres = (xres + 31) & ~31;
1029 else
1030 xres = (xres + 15) & ~15;
1031 if (yres >= 400)
1032 yres = (yres + 15) & ~15;
1033 else
1034 yres = (yres + 7) & ~7;
1035
1036 if (xres_virtual < xres)
1037 xres_virtual = xres;
1038 else if (bpp == 1)
1039 xres_virtual = (xres_virtual + 31) & ~31;
1040 else
1041 xres_virtual = (xres_virtual + 15) & ~15;
1042
1043 if (yres_virtual <= 0)
1044 yres_virtual = 0;
1045 else if (yres_virtual < yres)
1046 yres_virtual = yres;
1047
1048 /* backward bug-compatibility */
1049 if (var->pixclock > 1)
1050 var->pixclock -= 1;
1051
1052 par->hw.falcon.line_width = bpp * xres / 16;
1053 par->hw.falcon.line_offset = bpp * (xres_virtual - xres) / 16;
1054
1055 /* single or double pixel width */
1056 xstretch = (xres < 640) ? 2 : 1;
1057
1058#if 0 /* SM124 supports only 640x400, this is rejected above */
1059 if (mon_type == F_MON_SM) {
1060 if (xres != 640 && yres != 400)
1061 return -EINVAL;
1062 plen = 1;
1063 pclock = &f32;
1064 /* SM124-mode is special */
1065 par->hw.falcon.ste_mode = 1;
1066 par->hw.falcon.f_shift = 0x000;
1067 par->hw.falcon.st_shift = 0x200;
1068 left_margin = hsync_len = 128 / plen;
1069 right_margin = 0;
1070 /* TODO set all margins */
a1005012 1071 } else
1da177e4
LT		 1072#endif
1073 if (mon_type == F_MON_SC || mon_type == F_MON_TV) {
1074 plen = 2 * xstretch;
1075 if (var->pixclock > f32.t * plen)
1076 return -EINVAL;
1077 pclock = &f32;
1078 if (yres > 240)
1079 interlace = 1;
1080 if (var->pixclock == 0) {
1081 /* set some minimal margins which center the screen */
1082 left_margin = 32;
1083 right_margin = 18;
1084 hsync_len = pclock->hsync / plen;
1085 upper_margin = 31;
1086 lower_margin = 14;
1087 vsync_len = interlace ? 3 : 4;
1088 } else {
1089 left_margin = var->left_margin;
1090 right_margin = var->right_margin;
1091 hsync_len = var->hsync_len;
1092 upper_margin = var->upper_margin;
1093 lower_margin = var->lower_margin;
1094 vsync_len = var->vsync_len;
1095 if (var->vmode & FB_VMODE_INTERLACED) {
1096 upper_margin = (upper_margin + 1) / 2;
1097 lower_margin = (lower_margin + 1) / 2;
1098 vsync_len = (vsync_len + 1) / 2;
1099 } else if (var->vmode & FB_VMODE_DOUBLE) {
1100 upper_margin *= 2;
1101 lower_margin *= 2;
1102 vsync_len *= 2;
1103 }
1104 }
a1005012 1105 } else { /* F_MON_VGA */
1da177e4 1106 if (bpp == 16)
a1005012 1107 xstretch = 2; /* Double pixel width only for hicolor */
1da177e4
LT		 1108 /* Default values are used for vert./hor. timing if no pixelclock given. */
1109 if (var->pixclock == 0) {
1110 int linesize;
1111
1112 /* Choose master pixelclock depending on hor. timing */
1113 plen = 1 * xstretch;
a1005012 1114 if ((plen * xres + f25.right + f25.hsync + f25.left) *
1da177e4
LT		 1115 fb_info.monspecs.hfmin < f25.f)
1116 pclock = &f25;
a1005012
MS		 1117 else if ((plen * xres + f32.right + f32.hsync +
1118 f32.left) * fb_info.monspecs.hfmin < f32.f)
1da177e4 1119 pclock = &f32;
a1005012
MS		 1120 else if ((plen * xres + fext.right + fext.hsync +
1121 fext.left) * fb_info.monspecs.hfmin < fext.f &&
1122 fext.f)
1da177e4
LT		 1123 pclock = &fext;
1124 else
1125 return -EINVAL;
1126
1127 left_margin = pclock->left / plen;
1128 right_margin = pclock->right / plen;
1129 hsync_len = pclock->hsync / plen;
1130 linesize = left_margin + xres + right_margin + hsync_len;
1131 upper_margin = 31;
1132 lower_margin = 11;
1133 vsync_len = 3;
a1005012 1134 } else {
1da177e4
LT		 1135 /* Choose largest pixelclock <= wanted clock */
1136 int i;
1137 unsigned long pcl = ULONG_MAX;
1138 pclock = 0;
a1005012
MS		 1139 for (i = 1; i <= 4; i *= 2) {
1140 if (f25.t * i >= var->pixclock &&
1141 f25.t * i < pcl) {
1da177e4
LT		 1142 pcl = f25.t * i;
1143 pclock = &f25;
1144 }
a1005012
MS		 1145 if (f32.t * i >= var->pixclock &&
1146 f32.t * i < pcl) {
1da177e4
LT		 1147 pcl = f32.t * i;
1148 pclock = &f32;
1149 }
a1005012
MS		 1150 if (fext.t && fext.t * i >= var->pixclock &&
1151 fext.t * i < pcl) {
1da177e4
LT		 1152 pcl = fext.t * i;
1153 pclock = &fext;
1154 }
1155 }
1156 if (!pclock)
1157 return -EINVAL;
1158 plen = pcl / pclock->t;
1159
1160 left_margin = var->left_margin;
1161 right_margin = var->right_margin;
1162 hsync_len = var->hsync_len;
1163 upper_margin = var->upper_margin;
1164 lower_margin = var->lower_margin;
1165 vsync_len = var->vsync_len;
1166 /* Internal unit is [single lines per (half-)frame] */
1167 if (var->vmode & FB_VMODE_INTERLACED) {
1168 /* # lines in half frame */
1169 /* External unit is [lines per full frame] */
1170 upper_margin = (upper_margin + 1) / 2;
1171 lower_margin = (lower_margin + 1) / 2;
1172 vsync_len = (vsync_len + 1) / 2;
a1005012 1173 } else if (var->vmode & FB_VMODE_DOUBLE) {
1da177e4
LT		 1174 /* External unit is [double lines per frame] */
1175 upper_margin *= 2;
1176 lower_margin *= 2;
1177 vsync_len *= 2;
1178 }
1179 }
1180 if (pclock == &fext)
a1005012 1181 longoffset = 1; /* VIDEL doesn't synchronize on short offset */
1da177e4
LT		 1182 }
1183 /* Is video bus bandwidth (32MB/s) too low for this resolution? */
1184 /* this is definitely wrong if bus clock != 32MHz */
1185 if (pclock->f / plen / 8 * bpp > 32000000L)
1186 return -EINVAL;
1187
1188 if (vsync_len < 1)
1189 vsync_len = 1;
1190
1191 /* include sync lengths in right/lower margin for all calculations */
1192 right_margin += hsync_len;
1193 lower_margin += vsync_len;
1194
1195 /* ! In all calculations of margins we use # of lines in half frame
1196 * (which is a full frame in non-interlace mode), so we can switch
1197 * between interlace and non-interlace without messing around
1198 * with these.
1199 */
a1005012 1200again:
1da177e4
LT		 1201 /* Set base_offset 128 and video bus width */
1202 par->hw.falcon.vid_control = mon_type | f030_bus_width;
1203 if (!longoffset)
1204 par->hw.falcon.vid_control |= VCO_SHORTOFFS; /* base_offset 64 */
1205 if (var->sync & FB_SYNC_HOR_HIGH_ACT)
1206 par->hw.falcon.vid_control |= VCO_HSYPOS;
1207 if (var->sync & FB_SYNC_VERT_HIGH_ACT)
1208 par->hw.falcon.vid_control |= VCO_VSYPOS;
1209 /* Pixelclock */
1210 par->hw.falcon.vid_control |= pclock->control_mask;
1211 /* External or internal clock */
1212 par->hw.falcon.sync = pclock->sync_mask | 0x2;
1213 /* Pixellength and prescale */
a1005012 1214 par->hw.falcon.vid_mode = (2 / plen) << 2;
1da177e4
LT		 1215 if (doubleline)
1216 par->hw.falcon.vid_mode |= VMO_DOUBLE;
1217 if (interlace)
1218 par->hw.falcon.vid_mode |= VMO_INTER;
1219
1220 /*********************
a1005012
MS		 1221 * Horizontal timing: unit = [master clock cycles]
1222 * unit of hxx-registers: [master clock cycles * prescale]
1223 * Hxx-registers are 9 bit wide
1224 *
1225 * 1 line = ((hht + 2) * 2 * prescale) clock cycles
1226 *
1227 * graphic output = hdb & 0x200 ?
1228 * ((hht + 2) * 2 - hdb + hde) * prescale - hdboff + hdeoff:
1229 * (hht + 2 - hdb + hde) * prescale - hdboff + hdeoff
1230 * (this must be a multiple of plen*128/bpp, on VGA pixels
1231 * to the right may be cut off with a bigger right margin)
1232 *
1233 * start of graphics relative to start of 1st halfline = hdb & 0x200 ?
1234 * (hdb - hht - 2) * prescale + hdboff :
1235 * hdb * prescale + hdboff
1236 *
1237 * end of graphics relative to start of 1st halfline =
1238 * (hde + hht + 2) * prescale + hdeoff
1239 *********************/
1da177e4 1240 /* Calculate VIDEL registers */
a1005012 1241{
1da177e4
LT		 1242 prescale = hxx_prescale(&par->hw.falcon);
1243 base_off = par->hw.falcon.vid_control & VCO_SHORTOFFS ? 64 : 128;
1244
1245 /* Offsets depend on video mode */
1246 /* Offsets are in clock cycles, divide by prescale to
1247 * calculate hd[be]-registers
1248 */
1249 if (par->hw.falcon.f_shift & 0x100) {
1250 align = 1;
1251 hde_off = 0;
1252 hdb_off = (base_off + 16 * plen) + prescale;
a1005012 1253 } else {
1da177e4
LT		 1254 align = 128 / bpp;
1255 hde_off = ((128 / bpp + 2) * plen);
1256 if (par->hw.falcon.ste_mode)
1257 hdb_off = (64 + base_off + (128 / bpp + 2) * plen) + prescale;
1258 else
1259 hdb_off = (base_off + (128 / bpp + 18) * plen) + prescale;
1260 }
1261
a1005012 1262 gstart = (prescale / 2 + plen * left_margin) / prescale;
1da177e4 1263 /* gend1 is for hde (gend-gstart multiple of align), shifter's xres */
416e74ea 1264 gend1 = gstart + roundup(xres, align) * plen / prescale;
1da177e4
LT		 1265 /* gend2 is for hbb, visible xres (rest to gend1 is cut off by hblank) */
1266 gend2 = gstart + xres * plen / prescale;
1267 par->HHT = plen * (left_margin + xres + right_margin) /
1268 (2 * prescale) - 2;
1269/* par->HHT = (gend2 + plen * right_margin / prescale) / 2 - 2;*/
1270
a1005012 1271 par->HDB = gstart - hdb_off / prescale;
1da177e4 1272 par->HBE = gstart;
a1005012
MS		 1273 if (par->HDB < 0)
1274 par->HDB += par->HHT + 2 + 0x200;
1275 par->HDE = gend1 - par->HHT - 2 - hde_off / prescale;
1da177e4
LT		 1276 par->HBB = gend2 - par->HHT - 2;
1277#if 0
1278 /* One more Videl constraint: data fetch of two lines must not overlap */
a1005012 1279 if ((par->HDB & 0x200) && (par->HDB & ~0x200) - par->HDE <= 5) {
1da177e4
LT		 1280 /* if this happens increase margins, decrease hfreq. */
1281 }
1282#endif
1283 if (hde_off % prescale)
1284 par->HBB++; /* compensate for non matching hde and hbb */
1285 par->HSS = par->HHT + 2 - plen * hsync_len / prescale;
1286 if (par->HSS < par->HBB)
1287 par->HSS = par->HBB;
a1005012 1288}
1da177e4
LT		 1289
1290 /* check hor. frequency */
a1005012
MS		 1291 hfreq = pclock->f / ((par->HHT + 2) * prescale * 2);
1292 if (hfreq > fb_info.monspecs.hfmax && mon_type != F_MON_VGA) {
1da177e4
LT		 1293 /* ++guenther: ^^^^^^^^^^^^^^^^^^^ can't remember why I did this */
1294 /* Too high -> enlarge margin */
1295 left_margin += 1;
1296 right_margin += 1;
1297 goto again;
1298 }
1299 if (hfreq > fb_info.monspecs.hfmax || hfreq < fb_info.monspecs.hfmin)
1300 return -EINVAL;
1301
1302 /* Vxx-registers */
1303 /* All Vxx must be odd in non-interlace, since frame starts in the middle
1304 * of the first displayed line!
1305 * One frame consists of VFT+1 half lines. VFT+1 must be even in
1306 * non-interlace, odd in interlace mode for synchronisation.
1307 * Vxx-registers are 11 bit wide
1308 */
1309 par->VBE = (upper_margin * 2 + 1); /* must begin on odd halfline */
1310 par->VDB = par->VBE;
1311 par->VDE = yres;
a1005012
MS		 1312 if (!interlace)
1313 par->VDE <<= 1;
1314 if (doubleline)
1315 par->VDE <<= 1; /* VDE now half lines per (half-)frame */
1da177e4
LT		 1316 par->VDE += par->VDB;
1317 par->VBB = par->VDE;
1318 par->VFT = par->VBB + (lower_margin * 2 - 1) - 1;
a1005012 1319 par->VSS = par->VFT + 1 - (vsync_len * 2 - 1);
1da177e4
LT		 1320 /* vbb,vss,vft must be even in interlace mode */
1321 if (interlace) {
1322 par->VBB++;
1323 par->VSS++;
1324 par->VFT++;
1325 }
1326
1327 /* V-frequency check, hope I didn't create any loop here. */
1328 /* Interlace and doubleline are mutually exclusive. */
1329 vfreq = (hfreq * 2) / (par->VFT + 1);
a1005012 1330 if (vfreq > fb_info.monspecs.vfmax && !doubleline && !interlace) {
1da177e4
LT		 1331 /* Too high -> try again with doubleline */
1332 doubleline = 1;
1333 goto again;
a1005012 1334 } else if (vfreq < fb_info.monspecs.vfmin && !interlace && !doubleline) {
1da177e4
LT		 1335 /* Too low -> try again with interlace */
1336 interlace = 1;
1337 goto again;
a1005012 1338 } else if (vfreq < fb_info.monspecs.vfmin && doubleline) {
1da177e4
LT		 1339 /* Doubleline too low -> clear doubleline and enlarge margins */
1340 int lines;
1341 doubleline = 0;
a1005012
MS		 1342 for (lines = 0;
1343 (hfreq * 2) / (par->VFT + 1 + 4 * lines - 2 * yres) >
1344 fb_info.monspecs.vfmax;
1da177e4
LT		 1345 lines++)
1346 ;
1347 upper_margin += lines;
1348 lower_margin += lines;
1349 goto again;
a1005012 1350 } else if (vfreq > fb_info.monspecs.vfmax && doubleline) {
1da177e4
LT		 1351 /* Doubleline too high -> enlarge margins */
1352 int lines;
a1005012
MS		 1353 for (lines = 0;
1354 (hfreq * 2) / (par->VFT + 1 + 4 * lines) >
1355 fb_info.monspecs.vfmax;
1356 lines += 2)
1da177e4
LT		 1357 ;
1358 upper_margin += lines;
1359 lower_margin += lines;
1360 goto again;
a1005012 1361 } else if (vfreq > fb_info.monspecs.vfmax && interlace) {
1da177e4
LT		 1362 /* Interlace, too high -> enlarge margins */
1363 int lines;
a1005012
MS		 1364 for (lines = 0;
1365 (hfreq * 2) / (par->VFT + 1 + 4 * lines) >
1366 fb_info.monspecs.vfmax;
1da177e4
LT		 1367 lines++)
1368 ;
1369 upper_margin += lines;
1370 lower_margin += lines;
1371 goto again;
a1005012
MS		 1372 } else if (vfreq < fb_info.monspecs.vfmin ||
1373 vfreq > fb_info.monspecs.vfmax)
1da177e4
LT		 1374 return -EINVAL;
1375
a1005012 1376set_screen_base:
1da177e4
LT		 1377 linelen = xres_virtual * bpp / 8;
1378 if (yres_virtual * linelen > screen_len && screen_len)
1379 return -EINVAL;
1380 if (yres * linelen > screen_len && screen_len)
1381 return -EINVAL;
1382 if (var->yoffset + yres > yres_virtual && yres_virtual)
1383 return -EINVAL;
1384 par->yres_virtual = yres_virtual;
1385 par->screen_base = screen_base + var->yoffset * linelen;
1386 par->hw.falcon.xoffset = 0;
1387
a1005012 1388 par->next_line = linelen;
a1005012 1389
1da177e4
LT		 1390 return 0;
1391}
1392
a1005012
MS		 1393static int falcon_encode_var(struct fb_var_screeninfo *var,
1394 struct atafb_par *par)
1da177e4
LT		 1395{
1396/* !!! only for VGA !!! */
1397 int linelen;
1398 int prescale, plen;
1399 int hdb_off, hde_off, base_off;
1400 struct falcon_hw *hw = &par->hw.falcon;
1401
1402 memset(var, 0, sizeof(struct fb_var_screeninfo));
1403 /* possible frequencies: 25.175 or 32MHz */
1404 var->pixclock = hw->sync & 0x1 ? fext.t :
1405 hw->vid_control & VCO_CLOCK25 ? f25.t : f32.t;
1406
a1005012
MS		 1407 var->height = -1;
1408 var->width = -1;
1da177e4 1409
a1005012 1410 var->sync = 0;
1da177e4
LT		 1411 if (hw->vid_control & VCO_HSYPOS)
1412 var->sync |= FB_SYNC_HOR_HIGH_ACT;
1413 if (hw->vid_control & VCO_VSYPOS)
1414 var->sync |= FB_SYNC_VERT_HIGH_ACT;
1415
1416 var->vmode = FB_VMODE_NONINTERLACED;
1417 if (hw->vid_mode & VMO_INTER)
1418 var->vmode |= FB_VMODE_INTERLACED;
1419 if (hw->vid_mode & VMO_DOUBLE)
1420 var->vmode |= FB_VMODE_DOUBLE;
a1005012 1421
1da177e4
LT		 1422 /* visible y resolution:
1423 * Graphics display starts at line VDB and ends at line
1424 * VDE. If interlace mode off unit of VC-registers is
1425 * half lines, else lines.
1426 */
1427 var->yres = hw->vde - hw->vdb;
1428 if (!(var->vmode & FB_VMODE_INTERLACED))
1429 var->yres >>= 1;
1430 if (var->vmode & FB_VMODE_DOUBLE)
1431 var->yres >>= 1;
1432
a1005012
MS		 1433 /*
1434 * to get bpp, we must examine f_shift and st_shift.
1da177e4
LT		 1435 * f_shift is valid if any of bits no. 10, 8 or 4
1436 * is set. Priority in f_shift is: 10 ">" 8 ">" 4, i.e.
1437 * if bit 10 set then bit 8 and bit 4 don't care...
1438 * If all these bits are 0 get display depth from st_shift
1439 * (as for ST and STE)
1440 */
a1005012 1441 if (hw->f_shift & 0x400) /* 2 colors */
1da177e4
LT		 1442 var->bits_per_pixel = 1;
1443 else if (hw->f_shift & 0x100) /* hicolor */
1444 var->bits_per_pixel = 16;
1445 else if (hw->f_shift & 0x010) /* 8 bitplanes */
1446 var->bits_per_pixel = 8;
1447 else if (hw->st_shift == 0)
1448 var->bits_per_pixel = 4;
1449 else if (hw->st_shift == 0x100)
1450 var->bits_per_pixel = 2;
a1005012 1451 else /* if (hw->st_shift == 0x200) */
1da177e4
LT		 1452 var->bits_per_pixel = 1;
1453
1454 var->xres = hw->line_width * 16 / var->bits_per_pixel;
1455 var->xres_virtual = var->xres + hw->line_offset * 16 / var->bits_per_pixel;
1456 if (hw->xoffset)
1457 var->xres_virtual += 16;
1458
1459 if (var->bits_per_pixel == 16) {
a1005012
MS		 1460 var->red.offset = 11;
1461 var->red.length = 5;
1462 var->red.msb_right = 0;
1463 var->green.offset = 5;
1464 var->green.length = 6;
1465 var->green.msb_right = 0;
1466 var->blue.offset = 0;
1467 var->blue.length = 5;
1468 var->blue.msb_right = 0;
1469 } else {
1470 var->red.offset = 0;
1da177e4 1471 var->red.length = hw->ste_mode ? 4 : 6;
a1005012
MS		 1472 if (var->red.length > var->bits_per_pixel)
1473 var->red.length = var->bits_per_pixel;
1474 var->red.msb_right = 0;
1475 var->grayscale = 0;
1476 var->blue = var->green = var->red;
1da177e4 1477 }
a1005012
MS		 1478 var->transp.offset = 0;
1479 var->transp.length = 0;
1480 var->transp.msb_right = 0;
1da177e4
LT		 1481
1482 linelen = var->xres_virtual * var->bits_per_pixel / 8;
1483 if (screen_len) {
1484 if (par->yres_virtual)
1485 var->yres_virtual = par->yres_virtual;
1486 else
a1005012 1487 /* yres_virtual == 0 means use maximum */
1da177e4 1488 var->yres_virtual = screen_len / linelen;
a1005012 1489 } else {
1da177e4
LT		 1490 if (hwscroll < 0)
1491 var->yres_virtual = 2 * var->yres;
1492 else
a1005012 1493 var->yres_virtual = var->yres + hwscroll * 16;
1da177e4 1494 }
a1005012 1495 var->xoffset = 0; /* TODO change this */
1da177e4
LT		 1496
1497 /* hdX-offsets */
1498 prescale = hxx_prescale(hw);
1499 plen = 4 >> (hw->vid_mode >> 2 & 0x3);
1500 base_off = hw->vid_control & VCO_SHORTOFFS ? 64 : 128;
1501 if (hw->f_shift & 0x100) {
1502 hde_off = 0;
1503 hdb_off = (base_off + 16 * plen) + prescale;
a1005012 1504 } else {
1da177e4
LT		 1505 hde_off = ((128 / var->bits_per_pixel + 2) * plen);
1506 if (hw->ste_mode)
1507 hdb_off = (64 + base_off + (128 / var->bits_per_pixel + 2) * plen)
1508 + prescale;
1509 else
1510 hdb_off = (base_off + (128 / var->bits_per_pixel + 18) * plen)
1511 + prescale;
1512 }
1513
1514 /* Right margin includes hsync */
1515 var->left_margin = hdb_off + prescale * ((hw->hdb & 0x1ff) -
a1005012
MS		 1516 (hw->hdb & 0x200 ? 2 + hw->hht : 0));
1517 if (hw->ste_mode || mon_type != F_MON_VGA)
1da177e4
LT		 1518 var->right_margin = prescale * (hw->hht + 2 - hw->hde) - hde_off;
1519 else
1520 /* can't use this in ste_mode, because hbb is +1 off */
1521 var->right_margin = prescale * (hw->hht + 2 - hw->hbb);
1522 var->hsync_len = prescale * (hw->hht + 2 - hw->hss);
1523
1524 /* Lower margin includes vsync */
a1005012
MS		 1525 var->upper_margin = hw->vdb / 2; /* round down to full lines */
1526 var->lower_margin = (hw->vft + 1 - hw->vde + 1) / 2; /* round up */
1527 var->vsync_len = (hw->vft + 1 - hw->vss + 1) / 2; /* round up */
1da177e4
LT		 1528 if (var->vmode & FB_VMODE_INTERLACED) {
1529 var->upper_margin *= 2;
1530 var->lower_margin *= 2;
1531 var->vsync_len *= 2;
a1005012 1532 } else if (var->vmode & FB_VMODE_DOUBLE) {
1da177e4
LT		 1533 var->upper_margin = (var->upper_margin + 1) / 2;
1534 var->lower_margin = (var->lower_margin + 1) / 2;
1535 var->vsync_len = (var->vsync_len + 1) / 2;
1536 }
1537
1538 var->pixclock *= plen;
1539 var->left_margin /= plen;
1540 var->right_margin /= plen;
1541 var->hsync_len /= plen;
1542
1543 var->right_margin -= var->hsync_len;
1544 var->lower_margin -= var->vsync_len;
1545
1546 if (screen_base)
a1005012 1547 var->yoffset = (par->screen_base - screen_base) / linelen;
1da177e4 1548 else
a1005012
MS		 1549 var->yoffset = 0;
1550 var->nonstd = 0; /* what is this for? */
1551 var->activate = 0;
1da177e4
LT		 1552 return 0;
1553}
1554
a1005012 1555static int f_change_mode;
1da177e4 1556static struct falcon_hw f_new_mode;
a1005012 1557static int f_pan_display;
1da177e4 1558
a1005012 1559static void falcon_get_par(struct atafb_par *par)
1da177e4
LT		 1560{
1561 unsigned long addr;
1562 struct falcon_hw *hw = &par->hw.falcon;
1563
1564 hw->line_width = shifter_f030.scn_width;
1565 hw->line_offset = shifter_f030.off_next;
1566 hw->st_shift = videl.st_shift & 0x300;
1567 hw->f_shift = videl.f_shift;
1568 hw->vid_control = videl.control;
1569 hw->vid_mode = videl.mode;
1570 hw->sync = shifter.syncmode & 0x1;
1571 hw->xoffset = videl.xoffset & 0xf;
1572 hw->hht = videl.hht;
1573 hw->hbb = videl.hbb;
1574 hw->hbe = videl.hbe;
1575 hw->hdb = videl.hdb;
1576 hw->hde = videl.hde;
1577 hw->hss = videl.hss;
1578 hw->vft = videl.vft;
1579 hw->vbb = videl.vbb;
1580 hw->vbe = videl.vbe;
1581 hw->vdb = videl.vdb;
1582 hw->vde = videl.vde;
1583 hw->vss = videl.vss;
1584
1585 addr = (shifter.bas_hi & 0xff) << 16 |
1586 (shifter.bas_md & 0xff) << 8 |
1587 (shifter.bas_lo & 0xff);
1588 par->screen_base = phys_to_virt(addr);
1589
1590 /* derived parameters */
a1005012 1591 hw->ste_mode = (hw->f_shift & 0x510) == 0 && hw->st_shift == 0x100;
1da177e4 1592 hw->mono = (hw->f_shift & 0x400) ||
a1005012 1593 ((hw->f_shift & 0x510) == 0 && hw->st_shift == 0x200);
1da177e4
LT		 1594}
1595
a1005012 1596static void falcon_set_par(struct atafb_par *par)
1da177e4
LT		 1597{
1598 f_change_mode = 0;
1599
1600 /* only set screen_base if really necessary */
1601 if (current_par.screen_base != par->screen_base)
1602 fbhw->set_screen_base(par->screen_base);
1603
1604 /* Don't touch any other registers if we keep the default resolution */
1605 if (DontCalcRes)
1606 return;
1607
1608 /* Tell vbl-handler to change video mode.
1609 * We change modes only on next VBL, to avoid desynchronisation
1610 * (a shift to the right and wrap around by a random number of pixels
1611 * in all monochrome modes).
1612 * This seems to work on my Falcon.
1613 */
1614 f_new_mode = par->hw.falcon;
1615 f_change_mode = 1;
1616}
1617
a1005012 1618static irqreturn_t falcon_vbl_switcher(int irq, void *dummy)
1da177e4
LT		 1619{
1620 struct falcon_hw *hw = &f_new_mode;
1621
1622 if (f_change_mode) {
1623 f_change_mode = 0;
1624
1625 if (hw->sync & 0x1) {
1626 /* Enable external pixelclock. This code only for ScreenWonder */
a1005012
MS		 1627 *(volatile unsigned short *)0xffff9202 = 0xffbf;
1628 } else {
1da177e4 1629 /* Turn off external clocks. Read sets all output bits to 1. */
a1005012 1630 *(volatile unsigned short *)0xffff9202;
1da177e4
LT		 1631 }
1632 shifter.syncmode = hw->sync;
1633
1634 videl.hht = hw->hht;
1635 videl.hbb = hw->hbb;
1636 videl.hbe = hw->hbe;
1637 videl.hdb = hw->hdb;
1638 videl.hde = hw->hde;
1639 videl.hss = hw->hss;
1640 videl.vft = hw->vft;
1641 videl.vbb = hw->vbb;
1642 videl.vbe = hw->vbe;
1643 videl.vdb = hw->vdb;
1644 videl.vde = hw->vde;
1645 videl.vss = hw->vss;
1646
a1005012 1647 videl.f_shift = 0; /* write enables Falcon palette, 0: 4 planes */
1da177e4 1648 if (hw->ste_mode) {
a1005012
MS		 1649 videl.st_shift = hw->st_shift; /* write enables STE palette */
1650 } else {
1da177e4 1651 /* IMPORTANT:
a1005012 1652 * set st_shift 0, so we can tell the screen-depth if f_shift == 0.
1da177e4 1653 * Writing 0 to f_shift enables 4 plane Falcon mode but
a1005012 1654 * doesn't set st_shift. st_shift != 0 (!= 4planes) is impossible
1da177e4
LT		 1655 * with Falcon palette.
1656 */
1657 videl.st_shift = 0;
1658 /* now back to Falcon palette mode */
1659 videl.f_shift = hw->f_shift;
1660 }
1661 /* writing to st_shift changed scn_width and vid_mode */
1662 videl.xoffset = hw->xoffset;
1663 shifter_f030.scn_width = hw->line_width;
1664 shifter_f030.off_next = hw->line_offset;
1665 videl.control = hw->vid_control;
1666 videl.mode = hw->vid_mode;
1667 }
1668 if (f_pan_display) {
1669 f_pan_display = 0;
1670 videl.xoffset = current_par.hw.falcon.xoffset;
1671 shifter_f030.off_next = current_par.hw.falcon.line_offset;
1672 }
1673 return IRQ_HANDLED;
1674}
1675
a1005012
MS		 1676static int falcon_pan_display(struct fb_var_screeninfo *var,
1677 struct fb_info *info)
1da177e4 1678{
a1005012
MS		 1679 struct atafb_par *par = (struct atafb_par *)info->par;
1680
1da177e4 1681 int xoffset;
a1005012 1682 int bpp = info->var.bits_per_pixel;
1da177e4
LT		 1683
1684 if (bpp == 1)
1685 var->xoffset = up(var->xoffset, 32);
1686 if (bpp != 16)
1687 par->hw.falcon.xoffset = var->xoffset & 15;
1688 else {
1689 par->hw.falcon.xoffset = 0;
1690 var->xoffset = up(var->xoffset, 2);
1691 }
1692 par->hw.falcon.line_offset = bpp *
a1005012 1693 (info->var.xres_virtual - info->var.xres) / 16;
1da177e4
LT		 1694 if (par->hw.falcon.xoffset)
1695 par->hw.falcon.line_offset -= bpp;
1696 xoffset = var->xoffset - par->hw.falcon.xoffset;
1697
1698 par->screen_base = screen_base +
a1005012 1699 (var->yoffset * info->var.xres_virtual + xoffset) * bpp / 8;
1da177e4 1700 if (fbhw->set_screen_base)
a1005012 1701 fbhw->set_screen_base(par->screen_base);
1da177e4 1702 else
a1005012 1703 return -EINVAL; /* shouldn't happen */
1da177e4
LT		 1704 f_pan_display = 1;
1705 return 0;
1706}
1707
a1005012
MS		 1708static int falcon_setcolreg(unsigned int regno, unsigned int red,
1709 unsigned int green, unsigned int blue,
1710 unsigned int transp, struct fb_info *info)
1da177e4
LT		 1711{
1712 if (regno > 255)
1713 return 1;
1714 f030_col[regno] = (((red & 0xfc00) << 16) |
1715 ((green & 0xfc00) << 8) |
1716 ((blue & 0xfc00) >> 8));
1717 if (regno < 16) {
1718 shifter_tt.color_reg[regno] =
1719 (((red & 0xe000) >> 13) | ((red & 0x1000) >> 12) << 8) |
1720 (((green & 0xe000) >> 13) | ((green & 0x1000) >> 12) << 4) |
1721 ((blue & 0xe000) >> 13) | ((blue & 0x1000) >> 12);
74511413
GU		 1722#ifdef ATAFB_FALCON
1723 ((u32 *)info->pseudo_palette)[regno] = ((red & 0xf800) |
1724 ((green & 0xfc00) >> 5) |
1725 ((blue & 0xf800) >> 11));
1da177e4
LT		 1726#endif
1727 }
1728 return 0;
1729}
1730
a1005012 1731static int falcon_blank(int blank_mode)
1da177e4 1732{
a1005012
MS		 1733 /* ++guenther: we can switch off graphics by changing VDB and VDE,
1734 * so VIDEL doesn't hog the bus while saving.
1735 * (this may affect usleep()).
1736 */
1da177e4
LT		 1737 int vdb, vss, hbe, hss;
1738
1739 if (mon_type == F_MON_SM) /* this doesn't work on SM124 */
1740 return 1;
1741
1742 vdb = current_par.VDB;
1743 vss = current_par.VSS;
1744 hbe = current_par.HBE;
1745 hss = current_par.HSS;
1746
1747 if (blank_mode >= 1) {
1748 /* disable graphics output (this speeds up the CPU) ... */
1749 vdb = current_par.VFT + 1;
1750 /* ... and blank all lines */
1751 hbe = current_par.HHT + 2;
1752 }
1753 /* use VESA suspend modes on VGA monitors */
1754 if (mon_type == F_MON_VGA) {
1755 if (blank_mode == 2 || blank_mode == 4)
1756 vss = current_par.VFT + 1;
1757 if (blank_mode == 3 || blank_mode == 4)
1758 hss = current_par.HHT + 2;
1759 }
1760
1761 videl.vdb = vdb;
1762 videl.vss = vss;
1763 videl.hbe = hbe;
1764 videl.hss = hss;
1765
1766 return 0;
1767}
1768
a1005012 1769static int falcon_detect(void)
1da177e4
LT		 1770{
1771 struct atafb_par par;
1772 unsigned char fhw;
1773
1774 /* Determine connected monitor and set monitor parameters */
a1005012 1775 fhw = *(unsigned char *)0xffff8006;
1da177e4
LT		 1776 mon_type = fhw >> 6 & 0x3;
1777 /* bit 1 of fhw: 1=32 bit ram bus, 0=16 bit */
1778 f030_bus_width = fhw << 6 & 0x80;
1779 switch (mon_type) {
1780 case F_MON_SM:
1781 fb_info.monspecs.vfmin = 70;
1782 fb_info.monspecs.vfmax = 72;
1783 fb_info.monspecs.hfmin = 35713;
1784 fb_info.monspecs.hfmax = 35715;
1785 break;
1786 case F_MON_SC:
1787 case F_MON_TV:
1788 /* PAL...NTSC */
a1005012 1789 fb_info.monspecs.vfmin = 49; /* not 50, since TOS defaults to 49.9x Hz */
1da177e4
LT		 1790 fb_info.monspecs.vfmax = 60;
1791 fb_info.monspecs.hfmin = 15620;
1792 fb_info.monspecs.hfmax = 15755;
1793 break;
1794 }
1795 /* initialize hsync-len */
1796 f25.hsync = h_syncs[mon_type] / f25.t;
1797 f32.hsync = h_syncs[mon_type] / f32.t;
1798 if (fext.t)
1799 fext.hsync = h_syncs[mon_type] / fext.t;
1800
1801 falcon_get_par(&par);
1802 falcon_encode_var(&atafb_predefined[0], &par);
1803
1804 /* Detected mode is always the "autodetect" slot */
1805 return 1;
1806}
1807
1808#endif /* ATAFB_FALCON */
1809
1810/* ------------------- ST(E) specific functions ---------------------- */
1811
1812#ifdef ATAFB_STE
1813
a1005012
MS		 1814static int stste_encode_fix(struct fb_fix_screeninfo *fix,
1815 struct atafb_par *par)
1da177e4
LT		 1816{
1817 int mode;
1818
a1005012 1819 strcpy(fix->id, "Atari Builtin");
1da177e4
LT		 1820 fix->smem_start = (unsigned long)real_screen_base;
1821 fix->smem_len = screen_len;
1822 fix->type = FB_TYPE_INTERLEAVED_PLANES;
1823 fix->type_aux = 2;
1824 fix->visual = FB_VISUAL_PSEUDOCOLOR;
1825 mode = par->hw.st.mode & 3;
1826 if (mode == ST_HIGH) {
1827 fix->type = FB_TYPE_PACKED_PIXELS;
1828 fix->type_aux = 0;
1829 fix->visual = FB_VISUAL_MONO10;
1830 }
1831 if (ATARIHW_PRESENT(EXTD_SHIFTER)) {
1832 fix->xpanstep = 16;
1833 fix->ypanstep = 1;
1834 } else {
1835 fix->xpanstep = 0;
1836 fix->ypanstep = 0;
1837 }
1838 fix->ywrapstep = 0;
02603930 1839 fix->line_length = par->next_line;
1da177e4
LT		 1840 fix->accel = FB_ACCEL_ATARIBLITT;
1841 return 0;
1842}
1843
a1005012
MS		 1844static int stste_decode_var(struct fb_var_screeninfo *var,
1845 struct atafb_par *par)
1da177e4 1846{
a1005012
MS		 1847 int xres = var->xres;
1848 int yres = var->yres;
1849 int bpp = var->bits_per_pixel;
1da177e4
LT		 1850 int linelen;
1851 int yres_virtual = var->yres_virtual;
1852
1853 if (mono_moni) {
1854 if (bpp > 1 || xres > sttt_xres || yres > st_yres)
1855 return -EINVAL;
a1005012
MS		 1856 par->hw.st.mode = ST_HIGH;
1857 xres = sttt_xres;
1858 yres = st_yres;
1859 bpp = 1;
1da177e4
LT		 1860 } else {
1861 if (bpp > 4 || xres > sttt_xres || yres > st_yres)
1862 return -EINVAL;
1863 if (bpp > 2) {
a1005012 1864 if (xres > sttt_xres / 2 || yres > st_yres / 2)
1da177e4 1865 return -EINVAL;
a1005012
MS		 1866 par->hw.st.mode = ST_LOW;
1867 xres = sttt_xres / 2;
1868 yres = st_yres / 2;
1869 bpp = 4;
1870 } else if (bpp > 1) {
1871 if (xres > sttt_xres || yres > st_yres / 2)
1da177e4 1872 return -EINVAL;
a1005012
MS		 1873 par->hw.st.mode = ST_MID;
1874 xres = sttt_xres;
1875 yres = st_yres / 2;
1876 bpp = 2;
1877 } else
1da177e4
LT		 1878 return -EINVAL;
1879 }
1880 if (yres_virtual <= 0)
1881 yres_virtual = 0;
1882 else if (yres_virtual < yres)
1883 yres_virtual = yres;
1884 if (var->sync & FB_SYNC_EXT)
a1005012 1885 par->hw.st.sync = (par->hw.st.sync & ~1) | 1;
1da177e4 1886 else
a1005012
MS		 1887 par->hw.st.sync = (par->hw.st.sync & ~1);
1888 linelen = xres * bpp / 8;
1da177e4
LT		 1889 if (yres_virtual * linelen > screen_len && screen_len)
1890 return -EINVAL;
1891 if (yres * linelen > screen_len && screen_len)
1892 return -EINVAL;
1893 if (var->yoffset + yres > yres_virtual && yres_virtual)
1894 return -EINVAL;
1895 par->yres_virtual = yres_virtual;
a1005012 1896 par->screen_base = screen_base + var->yoffset * linelen;
02603930 1897 par->next_line = linelen;
1da177e4
LT		 1898 return 0;
1899}
1900
a1005012
MS		 1901static int stste_encode_var(struct fb_var_screeninfo *var,
1902 struct atafb_par *par)
1da177e4
LT		 1903{
1904 int linelen;
1905 memset(var, 0, sizeof(struct fb_var_screeninfo));
a1005012 1906 var->red.offset = 0;
1da177e4 1907 var->red.length = ATARIHW_PRESENT(EXTD_SHIFTER) ? 4 : 3;
a1005012
MS		 1908 var->red.msb_right = 0;
1909 var->grayscale = 0;
1da177e4 1910
a1005012
MS		 1911 var->pixclock = 31041;
1912 var->left_margin = 120; /* these are incorrect */
1913 var->right_margin = 100;
1914 var->upper_margin = 8;
1915 var->lower_margin = 16;
1916 var->hsync_len = 140;
1917 var->vsync_len = 30;
1da177e4 1918
a1005012
MS		 1919 var->height = -1;
1920 var->width = -1;
1da177e4
LT		 1921
1922 if (!(par->hw.st.sync & 1))
a1005012 1923 var->sync = 0;
1da177e4 1924 else
a1005012 1925 var->sync = FB_SYNC_EXT;
1da177e4
LT		 1926
1927 switch (par->hw.st.mode & 3) {
1928 case ST_LOW:
a1005012
MS		 1929 var->xres = sttt_xres / 2;
1930 var->yres = st_yres / 2;
1931 var->bits_per_pixel = 4;
1da177e4
LT		 1932 break;
1933 case ST_MID:
a1005012
MS		 1934 var->xres = sttt_xres;
1935 var->yres = st_yres / 2;
1936 var->bits_per_pixel = 2;
1da177e4
LT		 1937 break;
1938 case ST_HIGH:
a1005012
MS		 1939 var->xres = sttt_xres;
1940 var->yres = st_yres;
1941 var->bits_per_pixel = 1;
1da177e4 1942 break;
a1005012
MS		 1943 }
1944 var->blue = var->green = var->red;
1945 var->transp.offset = 0;
1946 var->transp.length = 0;
1947 var->transp.msb_right = 0;
1948 var->xres_virtual = sttt_xres_virtual;
1949 linelen = var->xres_virtual * var->bits_per_pixel / 8;
1950 ovsc_addlen = linelen * (sttt_yres_virtual - st_yres);
1951
1952 if (!use_hwscroll)
1953 var->yres_virtual = var->yres;
1da177e4
LT		 1954 else if (screen_len) {
1955 if (par->yres_virtual)
1956 var->yres_virtual = par->yres_virtual;
1957 else
a1005012 1958 /* yres_virtual == 0 means use maximum */
1da177e4 1959 var->yres_virtual = screen_len / linelen;
a1005012 1960 } else {
1da177e4
LT		 1961 if (hwscroll < 0)
1962 var->yres_virtual = 2 * var->yres;
1963 else
a1005012 1964 var->yres_virtual = var->yres + hwscroll * 16;
1da177e4 1965 }
a1005012 1966 var->xoffset = 0;
1da177e4 1967 if (screen_base)
a1005012 1968 var->yoffset = (par->screen_base - screen_base) / linelen;
1da177e4 1969 else
a1005012
MS		 1970 var->yoffset = 0;
1971 var->nonstd = 0;
1972 var->activate = 0;
1973 var->vmode = FB_VMODE_NONINTERLACED;
1da177e4
LT		 1974 return 0;
1975}
1976
a1005012 1977static void stste_get_par(struct atafb_par *par)
1da177e4
LT		 1978{
1979 unsigned long addr;
a1005012
MS		 1980 par->hw.st.mode = shifter_tt.st_shiftmode;
1981 par->hw.st.sync = shifter.syncmode;
1da177e4
LT		 1982 addr = ((shifter.bas_hi & 0xff) << 16) |
1983 ((shifter.bas_md & 0xff) << 8);
1984 if (ATARIHW_PRESENT(EXTD_SHIFTER))
1985 addr |= (shifter.bas_lo & 0xff);
1986 par->screen_base = phys_to_virt(addr);
1987}
1988
a1005012 1989static void stste_set_par(struct atafb_par *par)
1da177e4 1990{
a1005012
MS		 1991 shifter_tt.st_shiftmode = par->hw.st.mode;
1992 shifter.syncmode = par->hw.st.sync;
1da177e4
LT		 1993 /* only set screen_base if really necessary */
1994 if (current_par.screen_base != par->screen_base)
1995 fbhw->set_screen_base(par->screen_base);
1996}
1997
a1005012
MS		 1998static int stste_setcolreg(unsigned int regno, unsigned int red,
1999 unsigned int green, unsigned int blue,
2000 unsigned int transp, struct fb_info *info)
1da177e4
LT		 2001{
2002 if (regno > 15)
2003 return 1;
2004 red >>= 12;
2005 blue >>= 12;
2006 green >>= 12;
2007 if (ATARIHW_PRESENT(EXTD_SHIFTER))
2008 shifter_tt.color_reg[regno] =
2009 (((red & 0xe) >> 1) | ((red & 1) << 3) << 8) |
2010 (((green & 0xe) >> 1) | ((green & 1) << 3) << 4) |
2011 ((blue & 0xe) >> 1) | ((blue & 1) << 3);
2012 else
2013 shifter_tt.color_reg[regno] =
2014 ((red & 0xe) << 7) |
2015 ((green & 0xe) << 3) |
2016 ((blue & 0xe) >> 1);
2017 return 0;
2018}
2019
a1005012
MS		 2020static int stste_detect(void)
2021{
2022 struct atafb_par par;
1da177e4
LT		 2023
2024 /* Determine the connected monitor: The DMA sound must be
2025 * disabled before reading the MFP GPIP, because the Sound
2026 * Done Signal and the Monochrome Detect are XORed together!
2027 */
2028 if (ATARIHW_PRESENT(PCM_8BIT)) {
2029 tt_dmasnd.ctrl = DMASND_CTRL_OFF;
a1005012 2030 udelay(20); /* wait a while for things to settle down */
1da177e4 2031 }
3d92e8f3 2032 mono_moni = (st_mfp.par_dt_reg & 0x80) == 0;
1da177e4
LT		 2033
2034 stste_get_par(&par);
2035 stste_encode_var(&atafb_predefined[0], &par);
2036
2037 if (!ATARIHW_PRESENT(EXTD_SHIFTER))
2038 use_hwscroll = 0;
2039 return 1;
2040}
2041
2042static void stste_set_screen_base(void *s_base)
2043{
2044 unsigned long addr;
a1005012 2045 addr = virt_to_phys(s_base);
1da177e4 2046 /* Setup Screen Memory */
a1005012
MS		 2047 shifter.bas_hi = (unsigned char)((addr & 0xff0000) >> 16);
2048 shifter.bas_md = (unsigned char)((addr & 0x00ff00) >> 8);
1da177e4 2049 if (ATARIHW_PRESENT(EXTD_SHIFTER))
a1005012 2050 shifter.bas_lo = (unsigned char)(addr & 0x0000ff);
1da177e4
LT		 2051}
2052
2053#endif /* ATAFB_STE */
2054
2055/* Switching the screen size should be done during vsync, otherwise
2056 * the margins may get messed up. This is a well known problem of
2057 * the ST's video system.
2058 *
2059 * Unfortunately there is hardly any way to find the vsync, as the
2060 * vertical blank interrupt is no longer in time on machines with
2061 * overscan type modifications.
2062 *
2063 * We can, however, use Timer B to safely detect the black shoulder,
2064 * but then we've got to guess an appropriate delay to find the vsync.
2065 * This might not work on every machine.
2066 *
2067 * martin_rogge @ ki.maus.de, 8th Aug 1995
2068 */
2069
2070#define LINE_DELAY (mono_moni ? 30 : 70)
2071#define SYNC_DELAY (mono_moni ? 1500 : 2000)
2072
2073/* SWITCH_ACIA may be used for Falcon (ScreenBlaster III internal!) */
2074static void st_ovsc_switch(void)
2075{
a1005012
MS		 2076 unsigned long flags;
2077 register unsigned char old, new;
1da177e4 2078
a1005012
MS		 2079 if (!(atari_switches & ATARI_SWITCH_OVSC_MASK))
2080 return;
2081 local_irq_save(flags);
2082
3d92e8f3
GU		 2083 st_mfp.tim_ct_b = 0x10;
2084 st_mfp.active_edge |= 8;
2085 st_mfp.tim_ct_b = 0;
2086 st_mfp.tim_dt_b = 0xf0;
2087 st_mfp.tim_ct_b = 8;
2088 while (st_mfp.tim_dt_b > 1) /* TOS does it this way, don't ask why */
a1005012 2089 ;
3d92e8f3 2090 new = st_mfp.tim_dt_b;
a1005012
MS		 2091 do {
2092 udelay(LINE_DELAY);
2093 old = new;
3d92e8f3 2094 new = st_mfp.tim_dt_b;
a1005012 2095 } while (old != new);
3d92e8f3 2096 st_mfp.tim_ct_b = 0x10;
a1005012
MS		 2097 udelay(SYNC_DELAY);
2098
2099 if (atari_switches & ATARI_SWITCH_OVSC_IKBD)
2100 acia.key_ctrl = ACIA_DIV64 | ACIA_D8N1S | ACIA_RHTID | ACIA_RIE;
2101 if (atari_switches & ATARI_SWITCH_OVSC_MIDI)
2102 acia.mid_ctrl = ACIA_DIV16 | ACIA_D8N1S | ACIA_RHTID;
2103 if (atari_switches & (ATARI_SWITCH_OVSC_SND6|ATARI_SWITCH_OVSC_SND7)) {
2104 sound_ym.rd_data_reg_sel = 14;
2105 sound_ym.wd_data = sound_ym.rd_data_reg_sel |
2106 ((atari_switches & ATARI_SWITCH_OVSC_SND6) ? 0x40:0) |
2107 ((atari_switches & ATARI_SWITCH_OVSC_SND7) ? 0x80:0);
2108 }
2109 local_irq_restore(flags);
1da177e4
LT		 2110}
2111
2112/* ------------------- External Video ---------------------- */
2113
2114#ifdef ATAFB_EXT
2115
a1005012 2116static int ext_encode_fix(struct fb_fix_screeninfo *fix, struct atafb_par *par)
1da177e4 2117{
a1005012 2118 strcpy(fix->id, "Unknown Extern");
1da177e4
LT		 2119 fix->smem_start = (unsigned long)external_addr;
2120 fix->smem_len = PAGE_ALIGN(external_len);
2121 if (external_depth == 1) {
2122 fix->type = FB_TYPE_PACKED_PIXELS;
2123 /* The letters 'n' and 'i' in the "atavideo=external:" stand
2124 * for "normal" and "inverted", rsp., in the monochrome case */
2125 fix->visual =
2126 (external_pmode == FB_TYPE_INTERLEAVED_PLANES ||
2127 external_pmode == FB_TYPE_PACKED_PIXELS) ?
a1005012
MS		 2128 FB_VISUAL_MONO10 : FB_VISUAL_MONO01;
2129 } else {
1da177e4
LT		 2130 /* Use STATIC if we don't know how to access color registers */
2131 int visual = external_vgaiobase ?
2132 FB_VISUAL_PSEUDOCOLOR :
2133 FB_VISUAL_STATIC_PSEUDOCOLOR;
2134 switch (external_pmode) {
a1005012
MS		 2135 case -1: /* truecolor */
2136 fix->type = FB_TYPE_PACKED_PIXELS;
2137 fix->visual = FB_VISUAL_TRUECOLOR;
1da177e4 2138 break;
a1005012
MS		 2139 case FB_TYPE_PACKED_PIXELS:
2140 fix->type = FB_TYPE_PACKED_PIXELS;
2141 fix->visual = visual;
1da177e4 2142 break;
a1005012
MS		 2143 case FB_TYPE_PLANES:
2144 fix->type = FB_TYPE_PLANES;
2145 fix->visual = visual;
1da177e4 2146 break;
a1005012
MS		 2147 case FB_TYPE_INTERLEAVED_PLANES:
2148 fix->type = FB_TYPE_INTERLEAVED_PLANES;
2149 fix->type_aux = 2;
2150 fix->visual = visual;
1da177e4
LT		 2151 break;
2152 }
2153 }
2154 fix->xpanstep = 0;
2155 fix->ypanstep = 0;
2156 fix->ywrapstep = 0;
02603930 2157 fix->line_length = par->next_line;
1da177e4
LT		 2158 return 0;
2159}
2160
a1005012 2161static int ext_decode_var(struct fb_var_screeninfo *var, struct atafb_par *par)
1da177e4
LT		 2162{
2163 struct fb_var_screeninfo *myvar = &atafb_predefined[0];
a1005012 2164
1da177e4 2165 if (var->bits_per_pixel > myvar->bits_per_pixel ||
a1005012
MS		 2166 var->xres > myvar->xres ||
2167 var->xres_virtual > myvar->xres_virtual ||
2168 var->yres > myvar->yres ||
2169 var->xoffset > 0 ||
2170 var->yoffset > 0)
1da177e4 2171 return -EINVAL;
02603930
GU		 2172
2173 par->next_line = external_xres_virtual * external_depth / 8;
1da177e4
LT		 2174 return 0;
2175}
2176
a1005012 2177static int ext_encode_var(struct fb_var_screeninfo *var, struct atafb_par *par)
1da177e4
LT		 2178{
2179 memset(var, 0, sizeof(struct fb_var_screeninfo));
a1005012
MS		 2180 var->red.offset = 0;
2181 var->red.length = (external_pmode == -1) ? external_depth / 3 :
1da177e4 2182 (external_vgaiobase ? external_bitspercol : 0);
a1005012
MS		 2183 var->red.msb_right = 0;
2184 var->grayscale = 0;
1da177e4 2185
a1005012
MS		 2186 var->pixclock = 31041;
2187 var->left_margin = 120; /* these are surely incorrect */
2188 var->right_margin = 100;
2189 var->upper_margin = 8;
2190 var->lower_margin = 16;
2191 var->hsync_len = 140;
2192 var->vsync_len = 30;
1da177e4 2193
a1005012
MS		 2194 var->height = -1;
2195 var->width = -1;
1da177e4 2196
a1005012 2197 var->sync = 0;
1da177e4
LT		 2198
2199 var->xres = external_xres;
2200 var->yres = external_yres;
2201 var->xres_virtual = external_xres_virtual;
2202 var->bits_per_pixel = external_depth;
a1005012
MS		 2203
2204 var->blue = var->green = var->red;
2205 var->transp.offset = 0;
2206 var->transp.length = 0;
2207 var->transp.msb_right = 0;
2208 var->yres_virtual = var->yres;
2209 var->xoffset = 0;
2210 var->yoffset = 0;
2211 var->nonstd = 0;
2212 var->activate = 0;
2213 var->vmode = FB_VMODE_NONINTERLACED;
1da177e4
LT		 2214 return 0;
2215}
2216
a1005012 2217static void ext_get_par(struct atafb_par *par)
1da177e4
LT		 2218{
2219 par->screen_base = external_addr;
2220}
2221
a1005012 2222static void ext_set_par(struct atafb_par *par)
1da177e4
LT		 2223{
2224}
2225
2226#define OUTB(port,val) \
a1005012 2227 *((unsigned volatile char *) ((port)+external_vgaiobase)) = (val)
1da177e4
LT		 2228#define INB(port) \
2229 (*((unsigned volatile char *) ((port)+external_vgaiobase)))
a1005012 2230#define DACDelay \
1da177e4 2231 do { \
a1005012
MS		 2232 unsigned char tmp = INB(0x3da); \
2233 tmp = INB(0x3da); \
1da177e4
LT		 2234 } while (0)
2235
a1005012
MS		 2236static int ext_setcolreg(unsigned int regno, unsigned int red,
2237 unsigned int green, unsigned int blue,
2238 unsigned int transp, struct fb_info *info)
1da177e4 2239{
a1005012 2240 unsigned char colmask = (1 << external_bitspercol) - 1;
1da177e4 2241
a1005012 2242 if (!external_vgaiobase)
1da177e4
LT		 2243 return 1;
2244
1da177e4 2245 switch (external_card_type) {
a1005012
MS		 2246 case IS_VGA:
2247 OUTB(0x3c8, regno);
2248 DACDelay;
2249 OUTB(0x3c9, red & colmask);
2250 DACDelay;
2251 OUTB(0x3c9, green & colmask);
2252 DACDelay;
2253 OUTB(0x3c9, blue & colmask);
2254 DACDelay;
2255 return 0;
1da177e4 2256
a1005012
MS		 2257 case IS_MV300:
2258 OUTB((MV300_reg[regno] << 2) + 1, red);
2259 OUTB((MV300_reg[regno] << 2) + 1, green);
2260 OUTB((MV300_reg[regno] << 2) + 1, blue);
2261 return 0;
1da177e4 2262
a1005012
MS		 2263 default:
2264 return 1;
2265 }
2266}
2267
2268static int ext_detect(void)
1da177e4
LT		 2269{
2270 struct fb_var_screeninfo *myvar = &atafb_predefined[0];
2271 struct atafb_par dummy_par;
2272
2273 myvar->xres = external_xres;
2274 myvar->xres_virtual = external_xres_virtual;
2275 myvar->yres = external_yres;
2276 myvar->bits_per_pixel = external_depth;
2277 ext_encode_var(myvar, &dummy_par);
2278 return 1;
2279}
2280
2281#endif /* ATAFB_EXT */
2282
2283/* ------ This is the same for most hardware types -------- */
2284
2285static void set_screen_base(void *s_base)
2286{
2287 unsigned long addr;
a1005012
MS		 2288
2289 addr = virt_to_phys(s_base);
1da177e4 2290 /* Setup Screen Memory */
a1005012
MS		 2291 shifter.bas_hi = (unsigned char)((addr & 0xff0000) >> 16);
2292 shifter.bas_md = (unsigned char)((addr & 0x00ff00) >> 8);
2293 shifter.bas_lo = (unsigned char)(addr & 0x0000ff);
1da177e4
LT		 2294}
2295
a1005012 2296static int pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
1da177e4 2297{
a1005012
MS		 2298 struct atafb_par *par = (struct atafb_par *)info->par;
2299
1da177e4 2300 if (!fbhw->set_screen_base ||
a1005012 2301 (!ATARIHW_PRESENT(EXTD_SHIFTER) && var->xoffset))
1da177e4
LT		 2302 return -EINVAL;
2303 var->xoffset = up(var->xoffset, 16);
2304 par->screen_base = screen_base +
a1005012
MS		 2305 (var->yoffset * info->var.xres_virtual + var->xoffset)
2306 * info->var.bits_per_pixel / 8;
2307 fbhw->set_screen_base(par->screen_base);
1da177e4
LT		 2308 return 0;
2309}
2310
1da177e4
LT		 2311/* ------------ Interfaces to hardware functions ------------ */
2312
1da177e4
LT		 2313#ifdef ATAFB_TT
2314static struct fb_hwswitch tt_switch = {
a1005012
MS		 2315 .detect = tt_detect,
2316 .encode_fix = tt_encode_fix,
2317 .decode_var = tt_decode_var,
2318 .encode_var = tt_encode_var,
2319 .get_par = tt_get_par,
2320 .set_par = tt_set_par,
2321 .set_screen_base = set_screen_base,
2322 .pan_display = pan_display,
1da177e4
LT		 2323};
2324#endif
2325
2326#ifdef ATAFB_FALCON
2327static struct fb_hwswitch falcon_switch = {
a1005012
MS		 2328 .detect = falcon_detect,
2329 .encode_fix = falcon_encode_fix,
2330 .decode_var = falcon_decode_var,
2331 .encode_var = falcon_encode_var,
2332 .get_par = falcon_get_par,
2333 .set_par = falcon_set_par,
2334 .set_screen_base = set_screen_base,
2335 .blank = falcon_blank,
2336 .pan_display = falcon_pan_display,
1da177e4
LT		 2337};
2338#endif
2339
2340#ifdef ATAFB_STE
2341static struct fb_hwswitch st_switch = {
a1005012
MS		 2342 .detect = stste_detect,
2343 .encode_fix = stste_encode_fix,
2344 .decode_var = stste_decode_var,
2345 .encode_var = stste_encode_var,
2346 .get_par = stste_get_par,
2347 .set_par = stste_set_par,
2348 .set_screen_base = stste_set_screen_base,
2349 .pan_display = pan_display
1da177e4
LT		 2350};
2351#endif
2352
2353#ifdef ATAFB_EXT
2354static struct fb_hwswitch ext_switch = {
a1005012
MS		 2355 .detect = ext_detect,
2356 .encode_fix = ext_encode_fix,
2357 .decode_var = ext_decode_var,
2358 .encode_var = ext_encode_var,
2359 .get_par = ext_get_par,
2360 .set_par = ext_set_par,
1da177e4
LT		 2361};
2362#endif
2363
a1005012 2364static void ata_get_par(struct atafb_par *par)
1da177e4 2365{
a1005012
MS		 2366 if (current_par_valid)
2367 *par = current_par;
1da177e4
LT		 2368 else
2369 fbhw->get_par(par);
2370}
2371
a1005012 2372static void ata_set_par(struct atafb_par *par)
1da177e4
LT		 2373{
2374 fbhw->set_par(par);
a1005012
MS		 2375 current_par = *par;
2376 current_par_valid = 1;
1da177e4
LT		 2377}
2378
2379
1da177e4
LT		 2380/* =========================================================== */
2381/* ============== Hardware Independent Functions ============= */
2382/* =========================================================== */
2383
1da177e4
LT		 2384/* used for hardware scrolling */
2385
a1005012 2386static int do_fb_set_var(struct fb_var_screeninfo *var, int isactive)
1da177e4 2387{
a1005012 2388 int err, activate;
1da177e4 2389 struct atafb_par par;
a1005012
MS		 2390
2391 err = fbhw->decode_var(var, &par);
2392 if (err)
1da177e4 2393 return err;
a1005012 2394 activate = var->activate;
1da177e4 2395 if (((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) && isactive)
a1005012 2396 ata_set_par(&par);
1da177e4 2397 fbhw->encode_var(var, &par);
a1005012 2398 var->activate = activate;
1da177e4
LT		 2399 return 0;
2400}
2401
feaa61e4
KH		 2402/* fbhw->encode_fix() must be called with fb_info->mm_lock held
2403 * if it is called after the register_framebuffer() - not a case here
2404 */
a1005012 2405static int atafb_get_fix(struct fb_fix_screeninfo *fix, struct fb_info *info)
1da177e4
LT		 2406{
2407 struct atafb_par par;
a1005012
MS		 2408 int err;
2409 // Get fix directly (case con == -1 before)??
2410 err = fbhw->decode_var(&info->var, &par);
2411 if (err)
2412 return err;
1da177e4 2413 memset(fix, 0, sizeof(struct fb_fix_screeninfo));
537a1bf0 2414 err = fbhw->encode_fix(fix, &par);
537a1bf0 2415 return err;
1da177e4 2416}
a1005012
MS		 2417
2418static int atafb_get_var(struct fb_var_screeninfo *var, struct fb_info *info)
1da177e4
LT		 2419{
2420 struct atafb_par par;
a1005012
MS		 2421
2422 ata_get_par(&par);
2423 fbhw->encode_var(var, &par);
2424
1da177e4
LT		 2425 return 0;
2426}
2427
a1005012
MS		 2428// No longer called by fbcon!
2429// Still called by set_var internally
2430
2431static void atafb_set_disp(struct fb_info *info)
1da177e4 2432{
a1005012
MS		 2433 atafb_get_var(&info->var, info);
2434 atafb_get_fix(&info->fix, info);
1da177e4 2435
a1005012 2436 info->screen_base = (void *)info->fix.smem_start;
1da177e4
LT		 2437}
2438
a1005012
MS		 2439static int atafb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
2440 u_int transp, struct fb_info *info)
2441{
2442 red >>= 8;
2443 green >>= 8;
2444 blue >>= 8;
2445
2446 return info->fbops->fb_setcolreg(regno, red, green, blue, transp, info);
2447}
2448
1da177e4 2449static int
a1005012 2450atafb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
1da177e4 2451{
a1005012
MS		 2452 int xoffset = var->xoffset;
2453 int yoffset = var->yoffset;
2454 int err;
2455
2456 if (var->vmode & FB_VMODE_YWRAP) {
2457 if (yoffset < 0 || yoffset >= info->var.yres_virtual || xoffset)
2458 return -EINVAL;
2459 } else {
2460 if (xoffset + info->var.xres > info->var.xres_virtual ||
2461 yoffset + info->var.yres > info->var.yres_virtual)
2462 return -EINVAL;
1da177e4 2463 }
a1005012
MS		 2464
2465 if (fbhw->pan_display) {
2466 err = fbhw->pan_display(var, info);
2467 if (err)
2468 return err;
2469 } else
2470 return -EINVAL;
2471
2472 info->var.xoffset = xoffset;
2473 info->var.yoffset = yoffset;
2474
2475 if (var->vmode & FB_VMODE_YWRAP)
2476 info->var.vmode |= FB_VMODE_YWRAP;
2477 else
2478 info->var.vmode &= ~FB_VMODE_YWRAP;
2479
1da177e4
LT		 2480 return 0;
2481}
2482
a1005012
MS		 2483/*
2484 * generic drawing routines; imageblit needs updating for image depth > 1
2485 */
2486
2487#if BITS_PER_LONG == 32
2488#define BYTES_PER_LONG 4
2489#define SHIFT_PER_LONG 5
2490#elif BITS_PER_LONG == 64
2491#define BYTES_PER_LONG 8
2492#define SHIFT_PER_LONG 6
2493#else
2494#define Please update me
2495#endif
1da177e4
LT		 2496
2497
a1005012 2498static void atafb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
1da177e4 2499{
a1005012
MS		 2500 struct atafb_par *par = (struct atafb_par *)info->par;
2501 int x2, y2;
2502 u32 width, height;
2503
2504 if (!rect->width || !rect->height)
2505 return;
2506
74511413
GU		 2507#ifdef ATAFB_FALCON
2508 if (info->var.bits_per_pixel == 16) {
2509 cfb_fillrect(info, rect);
2510 return;
2511 }
2512#endif
2513
a1005012
MS		 2514 /*
2515 * We could use hardware clipping but on many cards you get around
2516 * hardware clipping by writing to framebuffer directly.
2517 * */
2518 x2 = rect->dx + rect->width;
2519 y2 = rect->dy + rect->height;
2520 x2 = x2 < info->var.xres_virtual ? x2 : info->var.xres_virtual;
2521 y2 = y2 < info->var.yres_virtual ? y2 : info->var.yres_virtual;
2522 width = x2 - rect->dx;
2523 height = y2 - rect->dy;
2524
2525 if (info->var.bits_per_pixel == 1)
2526 atafb_mfb_fillrect(info, par->next_line, rect->color,
2527 rect->dy, rect->dx, height, width);
2528 else if (info->var.bits_per_pixel == 2)
2529 atafb_iplan2p2_fillrect(info, par->next_line, rect->color,
2530 rect->dy, rect->dx, height, width);
2531 else if (info->var.bits_per_pixel == 4)
2532 atafb_iplan2p4_fillrect(info, par->next_line, rect->color,
2533 rect->dy, rect->dx, height, width);
1da177e4 2534 else
a1005012
MS		 2535 atafb_iplan2p8_fillrect(info, par->next_line, rect->color,
2536 rect->dy, rect->dx, height, width);
2537
2538 return;
1da177e4
LT		 2539}
2540
a1005012 2541static void atafb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
1da177e4 2542{
a1005012
MS		 2543 struct atafb_par *par = (struct atafb_par *)info->par;
2544 int x2, y2;
2545 u32 dx, dy, sx, sy, width, height;
2546 int rev_copy = 0;
2547
74511413
GU		 2548#ifdef ATAFB_FALCON
2549 if (info->var.bits_per_pixel == 16) {
2550 cfb_copyarea(info, area);
2551 return;
2552 }
2553#endif
2554
a1005012
MS		 2555 /* clip the destination */
2556 x2 = area->dx + area->width;
2557 y2 = area->dy + area->height;
2558 dx = area->dx > 0 ? area->dx : 0;
2559 dy = area->dy > 0 ? area->dy : 0;
2560 x2 = x2 < info->var.xres_virtual ? x2 : info->var.xres_virtual;
2561 y2 = y2 < info->var.yres_virtual ? y2 : info->var.yres_virtual;
2562 width = x2 - dx;
2563 height = y2 - dy;
2564
1c0face9
RK		 2565 if (area->sx + dx < area->dx || area->sy + dy < area->dy)
2566 return;
2567
a1005012
MS		 2568 /* update sx,sy */
2569 sx = area->sx + (dx - area->dx);
2570 sy = area->sy + (dy - area->dy);
2571
2572 /* the source must be completely inside the virtual screen */
1c0face9
RK		 2573 if (sx + width > info->var.xres_virtual ||
2574 sy + height > info->var.yres_virtual)
a1005012 2575 return;
1da177e4 2576
a1005012
MS		 2577 if (dy > sy || (dy == sy && dx > sx)) {
2578 dy += height;
2579 sy += height;
2580 rev_copy = 1;
2581 }
1da177e4 2582
a1005012
MS		 2583 if (info->var.bits_per_pixel == 1)
2584 atafb_mfb_copyarea(info, par->next_line, sy, sx, dy, dx, height, width);
2585 else if (info->var.bits_per_pixel == 2)
2586 atafb_iplan2p2_copyarea(info, par->next_line, sy, sx, dy, dx, height, width);
2587 else if (info->var.bits_per_pixel == 4)
2588 atafb_iplan2p4_copyarea(info, par->next_line, sy, sx, dy, dx, height, width);
2589 else
2590 atafb_iplan2p8_copyarea(info, par->next_line, sy, sx, dy, dx, height, width);
2591
2592 return;
2593}
2594
2595static void atafb_imageblit(struct fb_info *info, const struct fb_image *image)
2596{
2597 struct atafb_par *par = (struct atafb_par *)info->par;
2598 int x2, y2;
2599 unsigned long *dst;
2600 int dst_idx;
2601 const char *src;
2602 u32 dx, dy, width, height, pitch;
2603
74511413
GU		 2604#ifdef ATAFB_FALCON
2605 if (info->var.bits_per_pixel == 16) {
2606 cfb_imageblit(info, image);
2607 return;
2608 }
2609#endif
2610
a1005012
MS		 2611 /*
2612 * We could use hardware clipping but on many cards you get around
2613 * hardware clipping by writing to framebuffer directly like we are
2614 * doing here.
2615 */
2616 x2 = image->dx + image->width;
2617 y2 = image->dy + image->height;
2618 dx = image->dx;
2619 dy = image->dy;
2620 x2 = x2 < info->var.xres_virtual ? x2 : info->var.xres_virtual;
2621 y2 = y2 < info->var.yres_virtual ? y2 : info->var.yres_virtual;
2622 width = x2 - dx;
2623 height = y2 - dy;
2624
2625 if (image->depth == 1) {
2626 // used for font data
2627 dst = (unsigned long *)
2628 ((unsigned long)info->screen_base & ~(BYTES_PER_LONG - 1));
2629 dst_idx = ((unsigned long)info->screen_base & (BYTES_PER_LONG - 1)) * 8;
2630 dst_idx += dy * par->next_line * 8 + dx;
2631 src = image->data;
2632 pitch = (image->width + 7) / 8;
2633 while (height--) {
2634
2635 if (info->var.bits_per_pixel == 1)
2636 atafb_mfb_linefill(info, par->next_line,
2637 dy, dx, width, src,
2638 image->bg_color, image->fg_color);
2639 else if (info->var.bits_per_pixel == 2)
2640 atafb_iplan2p2_linefill(info, par->next_line,
2641 dy, dx, width, src,
2642 image->bg_color, image->fg_color);
2643 else if (info->var.bits_per_pixel == 4)
2644 atafb_iplan2p4_linefill(info, par->next_line,
2645 dy, dx, width, src,
2646 image->bg_color, image->fg_color);
2647 else
2648 atafb_iplan2p8_linefill(info, par->next_line,
2649 dy, dx, width, src,
2650 image->bg_color, image->fg_color);
2651 dy++;
2652 src += pitch;
1da177e4 2653 }
a1005012 2654 } else {
96f47d61
GU		 2655 c2p_iplan2(info->screen_base, image->data, dx, dy, width,
2656 height, par->next_line, image->width,
2657 info->var.bits_per_pixel);
1da177e4 2658 }
1da177e4
LT		 2659}
2660
2661static int
67a6680d 2662atafb_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
1da177e4
LT		 2663{
2664 switch (cmd) {
2665#ifdef FBCMD_GET_CURRENTPAR
2666 case FBCMD_GET_CURRENTPAR:
2667 if (copy_to_user((void *)arg, (void *)&current_par,
2668 sizeof(struct atafb_par)))
2669 return -EFAULT;
2670 return 0;
2671#endif
2672#ifdef FBCMD_SET_CURRENTPAR
2673 case FBCMD_SET_CURRENTPAR:
2674 if (copy_from_user((void *)&current_par, (void *)arg,
2675 sizeof(struct atafb_par)))
2676 return -EFAULT;
a1005012 2677 ata_set_par(&current_par);
1da177e4
LT		 2678 return 0;
2679#endif
2680 }
2681 return -EINVAL;
2682}
2683
2684/* (un)blank/poweroff
2685 * 0 = unblank
2686 * 1 = blank
2687 * 2 = suspend vsync
2688 * 3 = suspend hsync
2689 * 4 = off
2690 */
a1005012 2691static int atafb_blank(int blank, struct fb_info *info)
1da177e4
LT		 2692{
2693 unsigned short black[16];
2694 struct fb_cmap cmap;
2695 if (fbhw->blank && !fbhw->blank(blank))
2696 return 1;
2697 if (blank) {
a1005012
MS		 2698 memset(black, 0, 16 * sizeof(unsigned short));
2699 cmap.red = black;
2700 cmap.green = black;
2701 cmap.blue = black;
2702 cmap.transp = NULL;
2703 cmap.start = 0;
2704 cmap.len = 16;
2705 fb_set_cmap(&cmap, info);
1da177e4 2706 }
a1005012 2707#if 0
1da177e4 2708 else
a1005012
MS		 2709 do_install_cmap(info);
2710#endif
2711 return 0;
2712}
2713
2714 /*
2715 * New fbcon interface ...
2716 */
2717
2718 /* check var by decoding var into hw par, rounding if necessary,
2719 * then encoding hw par back into new, validated var */
2720static int atafb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
2721{
2722 int err;
2723 struct atafb_par par;
2724
2725 /* Validate wanted screen parameters */
2726 // if ((err = ata_decode_var(var, &par)))
2727 err = fbhw->decode_var(var, &par);
2728 if (err)
2729 return err;
2730
2731 /* Encode (possibly rounded) screen parameters */
2732 fbhw->encode_var(var, &par);
1da177e4
LT		 2733 return 0;
2734}
2735
a1005012
MS		 2736 /* actually set hw par by decoding var, then setting hardware from
2737 * hw par just decoded */
2738static int atafb_set_par(struct fb_info *info)
2739{
2740 struct atafb_par *par = (struct atafb_par *)info->par;
2741
2742 /* Decode wanted screen parameters */
2743 fbhw->decode_var(&info->var, par);
537a1bf0 2744 mutex_lock(&info->mm_lock);
a1005012 2745 fbhw->encode_fix(&info->fix, par);
537a1bf0 2746 mutex_unlock(&info->mm_lock);
a1005012
MS		 2747
2748 /* Set new videomode */
2749 ata_set_par(par);
2750
2751 return 0;
2752}
2753
2754
1da177e4
LT		 2755static struct fb_ops atafb_ops = {
2756 .owner = THIS_MODULE,
a1005012
MS		 2757 .fb_check_var = atafb_check_var,
2758 .fb_set_par = atafb_set_par,
2759 .fb_setcolreg = atafb_setcolreg,
1da177e4 2760 .fb_blank = atafb_blank,
a1005012
MS		 2761 .fb_pan_display = atafb_pan_display,
2762 .fb_fillrect = atafb_fillrect,
2763 .fb_copyarea = atafb_copyarea,
2764 .fb_imageblit = atafb_imageblit,
1da177e4
LT		 2765 .fb_ioctl = atafb_ioctl,
2766};
2767
a1005012 2768static void check_default_par(int detected_mode)
1da177e4
LT		 2769{
2770 char default_name[10];
2771 int i;
2772 struct fb_var_screeninfo var;
2773 unsigned long min_mem;
2774
2775 /* First try the user supplied mode */
2776 if (default_par) {
a1005012 2777 var = atafb_predefined[default_par - 1];
1da177e4 2778 var.activate = FB_ACTIVATE_TEST;
a1005012
MS		 2779 if (do_fb_set_var(&var, 1))
2780 default_par = 0; /* failed */
1da177e4
LT		 2781 }
2782 /* Next is the autodetected one */
a1005012
MS		 2783 if (!default_par) {
2784 var = atafb_predefined[detected_mode - 1]; /* autodetect */
1da177e4 2785 var.activate = FB_ACTIVATE_TEST;
a1005012
MS		 2786 if (!do_fb_set_var(&var, 1))
2787 default_par = detected_mode;
1da177e4
LT		 2788 }
2789 /* If that also failed, try some default modes... */
a1005012 2790 if (!default_par) {
1da177e4 2791 /* try default1, default2... */
a1005012
MS		 2792 for (i = 1; i < 10; i++) {
2793 sprintf(default_name,"default%d", i);
2794 default_par = get_video_mode(default_name);
2795 if (!default_par)
1da177e4 2796 panic("can't set default video mode");
a1005012 2797 var = atafb_predefined[default_par - 1];
1da177e4 2798 var.activate = FB_ACTIVATE_TEST;
a1005012 2799 if (!do_fb_set_var(&var,1))
1da177e4
LT		 2800 break; /* ok */
2801 }
2802 }
a1005012 2803 min_mem = var.xres_virtual * var.yres_virtual * var.bits_per_pixel / 8;
1da177e4 2804 if (default_mem_req < min_mem)
a1005012 2805 default_mem_req = min_mem;
1da177e4
LT		 2806}
2807
1da177e4
LT		 2808#ifdef ATAFB_EXT
2809static void __init atafb_setup_ext(char *spec)
2810{
a1005012 2811 int xres, xres_virtual, yres, depth, planes;
1da177e4
LT		 2812 unsigned long addr, len;
2813 char *p;
2814
2815 /* Format is: <xres>;<yres>;<depth>;<plane organ.>;
2816 * <screen mem addr>
2817 * [;<screen mem length>[;<vgaiobase>[;<bits-per-col>[;<colorreg-type>
2818 * [;<xres-virtual>]]]]]
2819 *
2820 * 09/23/97 Juergen
2821 * <xres_virtual>: hardware's x-resolution (f.e. ProMST)
2822 *
2823 * Even xres_virtual is available, we neither support panning nor hw-scrolling!
2824 */
a1005012
MS		 2825 p = strsep(&spec, ";");
2826 if (!p || !*p)
2827 return;
1da177e4
LT		 2828 xres_virtual = xres = simple_strtoul(p, NULL, 10);
2829 if (xres <= 0)
a1005012 2830 return;
1da177e4 2831
a1005012
MS		 2832 p = strsep(&spec, ";");
2833 if (!p || !*p)
2834 return;
1da177e4
LT		 2835 yres = simple_strtoul(p, NULL, 10);
2836 if (yres <= 0)
a1005012 2837 return;
1da177e4 2838
a1005012
MS		 2839 p = strsep(&spec, ";");
2840 if (!p || !*p)
2841 return;
1da177e4
LT		 2842 depth = simple_strtoul(p, NULL, 10);
2843 if (depth != 1 && depth != 2 && depth != 4 && depth != 8 &&
a1005012
MS		 2844 depth != 16 && depth != 24)
2845 return;
1da177e4 2846
a1005012
MS		 2847 p = strsep(&spec, ";");
2848 if (!p || !*p)
2849 return;
1da177e4
LT		 2850 if (*p == 'i')
2851 planes = FB_TYPE_INTERLEAVED_PLANES;
2852 else if (*p == 'p')
2853 planes = FB_TYPE_PACKED_PIXELS;
2854 else if (*p == 'n')
2855 planes = FB_TYPE_PLANES;
2856 else if (*p == 't')
a1005012 2857 planes = -1; /* true color */
1da177e4
LT		 2858 else
2859 return;
2860
a1005012
MS		 2861 p = strsep(&spec, ";");
2862 if (!p || !*p)
1da177e4
LT		 2863 return;
2864 addr = simple_strtoul(p, NULL, 0);
2865
a1005012
MS		 2866 p = strsep(&spec, ";");
2867 if (!p || !*p)
2868 len = xres * yres * depth / 8;
1da177e4
LT		 2869 else
2870 len = simple_strtoul(p, NULL, 0);
2871
a1005012
MS		 2872 p = strsep(&spec, ";");
2873 if (p && *p)
2874 external_vgaiobase = simple_strtoul(p, NULL, 0);
1da177e4 2875
a1005012
MS		 2876 p = strsep(&spec, ";");
2877 if (p && *p) {
1da177e4
LT		 2878 external_bitspercol = simple_strtoul(p, NULL, 0);
2879 if (external_bitspercol > 8)
2880 external_bitspercol = 8;
2881 else if (external_bitspercol < 1)
2882 external_bitspercol = 1;
2883 }
2884
a1005012
MS		 2885 p = strsep(&spec, ";");
2886 if (p && *p) {
1da177e4
LT		 2887 if (!strcmp(p, "vga"))
2888 external_card_type = IS_VGA;
2889 if (!strcmp(p, "mv300"))
2890 external_card_type = IS_MV300;
2891 }
2892
a1005012
MS		 2893 p = strsep(&spec, ";");
2894 if (p && *p) {
1da177e4
LT		 2895 xres_virtual = simple_strtoul(p, NULL, 10);
2896 if (xres_virtual < xres)
2897 xres_virtual = xres;
a1005012
MS		 2898 if (xres_virtual * yres * depth / 8 > len)
2899 len = xres_virtual * yres * depth / 8;
1da177e4
LT		 2900 }
2901
a1005012
MS		 2902 external_xres = xres;
2903 external_xres_virtual = xres_virtual;
2904 external_yres = yres;
1da177e4
LT		 2905 external_depth = depth;
2906 external_pmode = planes;
a1005012
MS		 2907 external_addr = (void *)addr;
2908 external_len = len;
2909
2910 if (external_card_type == IS_MV300) {
2911 switch (external_depth) {
2912 case 1:
2913 MV300_reg = MV300_reg_1bit;
2914 break;
2915 case 4:
2916 MV300_reg = MV300_reg_4bit;
2917 break;
2918 case 8:
2919 MV300_reg = MV300_reg_8bit;
2920 break;
2921 }
2922 }
1da177e4
LT		 2923}
2924#endif /* ATAFB_EXT */
2925
1da177e4
LT		 2926static void __init atafb_setup_int(char *spec)
2927{
2928 /* Format to config extended internal video hardware like OverScan:
a1005012
MS		 2929 * "internal:<xres>;<yres>;<xres_max>;<yres_max>;<offset>"
2930 * Explanation:
2931 * <xres>: x-resolution
2932 * <yres>: y-resolution
2933 * The following are only needed if you have an overscan which
2934 * needs a black border:
2935 * <xres_max>: max. length of a line in pixels your OverScan hardware would allow
2936 * <yres_max>: max. number of lines your OverScan hardware would allow
2937 * <offset>: Offset from physical beginning to visible beginning
2938 * of screen in bytes
2939 */
1da177e4
LT		 2940 int xres;
2941 char *p;
2942
2943 if (!(p = strsep(&spec, ";")) || !*p)
2944 return;
2945 xres = simple_strtoul(p, NULL, 10);
2946 if (!(p = strsep(&spec, ";")) || !*p)
2947 return;
a1005012
MS		 2948 sttt_xres = xres;
2949 tt_yres = st_yres = simple_strtoul(p, NULL, 10);
2950 if ((p = strsep(&spec, ";")) && *p)
2951 sttt_xres_virtual = simple_strtoul(p, NULL, 10);
2952 if ((p = strsep(&spec, ";")) && *p)
2953 sttt_yres_virtual = simple_strtoul(p, NULL, 0);
2954 if ((p = strsep(&spec, ";")) && *p)
2955 ovsc_offset = simple_strtoul(p, NULL, 0);
1da177e4
LT		 2956
2957 if (ovsc_offset || (sttt_yres_virtual != st_yres))
a1005012 2958 use_hwscroll = 0;
1da177e4
LT		 2959}
2960
1da177e4
LT		 2961#ifdef ATAFB_FALCON
2962static void __init atafb_setup_mcap(char *spec)
2963{
2964 char *p;
2965 int vmin, vmax, hmin, hmax;
2966
2967 /* Format for monitor capabilities is: <Vmin>;<Vmax>;<Hmin>;<Hmax>
2968 * <V*> vertical freq. in Hz
2969 * <H*> horizontal freq. in kHz
2970 */
2971 if (!(p = strsep(&spec, ";")) || !*p)
2972 return;
2973 vmin = simple_strtoul(p, NULL, 10);
2974 if (vmin <= 0)
2975 return;
2976 if (!(p = strsep(&spec, ";")) || !*p)
2977 return;
2978 vmax = simple_strtoul(p, NULL, 10);
2979 if (vmax <= 0 || vmax <= vmin)
2980 return;
2981 if (!(p = strsep(&spec, ";")) || !*p)
2982 return;
2983 hmin = 1000 * simple_strtoul(p, NULL, 10);
2984 if (hmin <= 0)
2985 return;
2986 if (!(p = strsep(&spec, "")) || !*p)
2987 return;
2988 hmax = 1000 * simple_strtoul(p, NULL, 10);
2989 if (hmax <= 0 || hmax <= hmin)
2990 return;
2991
2992 fb_info.monspecs.vfmin = vmin;
2993 fb_info.monspecs.vfmax = vmax;
2994 fb_info.monspecs.hfmin = hmin;
2995 fb_info.monspecs.hfmax = hmax;
2996}
2997#endif /* ATAFB_FALCON */
2998
1da177e4
LT		 2999static void __init atafb_setup_user(char *spec)
3000{
3001 /* Format of user defined video mode is: <xres>;<yres>;<depth>
3002 */
3003 char *p;
3004 int xres, yres, depth, temp;
3005
a1005012
MS		 3006 p = strsep(&spec, ";");
3007 if (!p || !*p)
1da177e4
LT		 3008 return;
3009 xres = simple_strtoul(p, NULL, 10);
a1005012
MS		 3010 p = strsep(&spec, ";");
3011 if (!p || !*p)
1da177e4
LT		 3012 return;
3013 yres = simple_strtoul(p, NULL, 10);
a1005012
MS		 3014 p = strsep(&spec, "");
3015 if (!p || !*p)
1da177e4
LT		 3016 return;
3017 depth = simple_strtoul(p, NULL, 10);
a1005012
MS		 3018 temp = get_video_mode("user0");
3019 if (temp) {
3020 default_par = temp;
3021 atafb_predefined[default_par - 1].xres = xres;
3022 atafb_predefined[default_par - 1].yres = yres;
3023 atafb_predefined[default_par - 1].bits_per_pixel = depth;
1da177e4
LT		 3024 }
3025}
3026
a1005012 3027int __init atafb_setup(char *options)
1da177e4 3028{
a1005012
MS		 3029 char *this_opt;
3030 int temp;
1da177e4 3031
a1005012 3032 if (!options || !*options)
1da177e4 3033 return 0;
a1005012
MS		 3034
3035 while ((this_opt = strsep(&options, ",")) != NULL) {
3036 if (!*this_opt)
3037 continue;
3038 if ((temp = get_video_mode(this_opt))) {
3039 default_par = temp;
3040 mode_option = this_opt;
3041 } else if (!strcmp(this_opt, "inverse"))
3042 inverse = 1;
3043 else if (!strncmp(this_opt, "hwscroll_", 9)) {
3044 hwscroll = simple_strtoul(this_opt + 9, NULL, 10);
3045 if (hwscroll < 0)
3046 hwscroll = 0;
3047 if (hwscroll > 200)
3048 hwscroll = 200;
3049 }
1da177e4 3050#ifdef ATAFB_EXT
a1005012
MS		 3051 else if (!strcmp(this_opt, "mv300")) {
3052 external_bitspercol = 8;
3053 external_card_type = IS_MV300;
3054 } else if (!strncmp(this_opt, "external:", 9))
3055 atafb_setup_ext(this_opt + 9);
3056#endif
3057 else if (!strncmp(this_opt, "internal:", 9))
3058 atafb_setup_int(this_opt + 9);
3059#ifdef ATAFB_FALCON
3060 else if (!strncmp(this_opt, "eclock:", 7)) {
3061 fext.f = simple_strtoul(this_opt + 7, NULL, 10);
3062 /* external pixelclock in kHz --> ps */
3063 fext.t = 1000000000 / fext.f;
3064 fext.f *= 1000;
3065 } else if (!strncmp(this_opt, "monitorcap:", 11))
3066 atafb_setup_mcap(this_opt + 11);
3067#endif
3068 else if (!strcmp(this_opt, "keep"))
3069 DontCalcRes = 1;
3070 else if (!strncmp(this_opt, "R", 1))
3071 atafb_setup_user(this_opt + 1);
1da177e4 3072 }
a1005012
MS		 3073 return 0;
3074}
3075
3076int __init atafb_init(void)
3077{
639274d8 3078 int pad, detected_mode, error;
a1005012
MS		 3079 unsigned int defmode = 0;
3080 unsigned long mem_req;
3081
3082#ifndef MODULE
3083 char *option = NULL;
3084
3085 if (fb_get_options("atafb", &option))
3086 return -ENODEV;
3087 atafb_setup(option);
3088#endif
3089 printk("atafb_init: start\n");
3090
3091 if (!MACH_IS_ATARI)
e945b568 3092 return -ENODEV;
a1005012
MS		 3093
3094 do {
3095#ifdef ATAFB_EXT
3096 if (external_addr) {
3097 printk("atafb_init: initializing external hw\n");
3098 fbhw = &ext_switch;
3099 atafb_ops.fb_setcolreg = &ext_setcolreg;
3100 defmode = DEFMODE_EXT;
3101 break;
3102 }
3103#endif
3104#ifdef ATAFB_TT
3105 if (ATARIHW_PRESENT(TT_SHIFTER)) {
3106 printk("atafb_init: initializing TT hw\n");
3107 fbhw = &tt_switch;
3108 atafb_ops.fb_setcolreg = &tt_setcolreg;
3109 defmode = DEFMODE_TT;
3110 break;
3111 }
1da177e4 3112#endif
1da177e4 3113#ifdef ATAFB_FALCON
a1005012
MS		 3114 if (ATARIHW_PRESENT(VIDEL_SHIFTER)) {
3115 printk("atafb_init: initializing Falcon hw\n");
3116 fbhw = &falcon_switch;
3117 atafb_ops.fb_setcolreg = &falcon_setcolreg;
639274d8
GU		 3118 error = request_irq(IRQ_AUTO_4, falcon_vbl_switcher,
3119 IRQ_TYPE_PRIO,
3120 "framebuffer/modeswitch",
3121 falcon_vbl_switcher);
3122 if (error)
3123 return error;
a1005012
MS		 3124 defmode = DEFMODE_F30;
3125 break;
3126 }
3127#endif
3128#ifdef ATAFB_STE
3129 if (ATARIHW_PRESENT(STND_SHIFTER) ||
3130 ATARIHW_PRESENT(EXTD_SHIFTER)) {
3131 printk("atafb_init: initializing ST/E hw\n");
3132 fbhw = &st_switch;
3133 atafb_ops.fb_setcolreg = &stste_setcolreg;
3134 defmode = DEFMODE_STE;
3135 break;
3136 }
3137 fbhw = &st_switch;
3138 atafb_ops.fb_setcolreg = &stste_setcolreg;
3139 printk("Cannot determine video hardware; defaulting to ST(e)\n");
3140#else /* ATAFB_STE */
3141 /* no default driver included */
3142 /* Nobody will ever see this message :-) */
3143 panic("Cannot initialize video hardware");
3144#endif
3145 } while (0);
3146
3147 /* Multisync monitor capabilities */
3148 /* Atari-TOS defaults if no boot option present */
3149 if (fb_info.monspecs.hfmin == 0) {
3150 fb_info.monspecs.hfmin = 31000;
3151 fb_info.monspecs.hfmax = 32000;
3152 fb_info.monspecs.vfmin = 58;
3153 fb_info.monspecs.vfmax = 62;
1da177e4 3154 }
a1005012
MS		 3155
3156 detected_mode = fbhw->detect();
3157 check_default_par(detected_mode);
3158#ifdef ATAFB_EXT
3159 if (!external_addr) {
3160#endif /* ATAFB_EXT */
3161 mem_req = default_mem_req + ovsc_offset + ovsc_addlen;
3162 mem_req = PAGE_ALIGN(mem_req) + PAGE_SIZE;
3163 screen_base = atari_stram_alloc(mem_req, "atafb");
3164 if (!screen_base)
3165 panic("Cannot allocate screen memory");
3166 memset(screen_base, 0, mem_req);
3167 pad = -(unsigned long)screen_base & (PAGE_SIZE - 1);
3168 screen_base += pad;
3169 real_screen_base = screen_base + ovsc_offset;
3170 screen_len = (mem_req - pad - ovsc_offset) & PAGE_MASK;
3171 st_ovsc_switch();
3172 if (CPU_IS_040_OR_060) {
3173 /* On a '040+, the cache mode of video RAM must be set to
3174 * write-through also for internal video hardware! */
3175 cache_push(virt_to_phys(screen_base), screen_len);
3176 kernel_set_cachemode(screen_base, screen_len,
3177 IOMAP_WRITETHROUGH);
3178 }
3179 printk("atafb: screen_base %p real_screen_base %p screen_len %d\n",
3180 screen_base, real_screen_base, screen_len);
3181#ifdef ATAFB_EXT
3182 } else {
3183 /* Map the video memory (physical address given) to somewhere
3184 * in the kernel address space.
3185 */
3186 external_addr = ioremap_writethrough((unsigned long)external_addr,
3187 external_len);
3188 if (external_vgaiobase)
3189 external_vgaiobase =
3190 (unsigned long)ioremap(external_vgaiobase, 0x10000);
3191 screen_base =
3192 real_screen_base = external_addr;
3193 screen_len = external_len & PAGE_MASK;
3194 memset (screen_base, 0, external_len);
3195 }
3196#endif /* ATAFB_EXT */
3197
3198// strcpy(fb_info.mode->name, "Atari Builtin ");
3199 fb_info.fbops = &atafb_ops;
3200 // try to set default (detected; requested) var
3201 do_fb_set_var(&atafb_predefined[default_par - 1], 1);
3202 // reads hw state into current par, which may not be sane yet
3203 ata_get_par(&current_par);
3204 fb_info.par = &current_par;
3205 // tries to read from HW which may not be initialized yet
3206 // so set sane var first, then call atafb_set_par
3207 atafb_get_var(&fb_info.var, &fb_info);
74511413
GU		 3208
3209#ifdef ATAFB_FALCON
3210 fb_info.pseudo_palette = current_par.hw.falcon.pseudo_palette;
3211#endif
a1005012
MS		 3212 fb_info.flags = FBINFO_FLAG_DEFAULT;
3213
3214 if (!fb_find_mode(&fb_info.var, &fb_info, mode_option, atafb_modedb,
3215 NUM_TOTAL_MODES, &atafb_modedb[defmode],
3216 fb_info.var.bits_per_pixel)) {
3217 return -EINVAL;
3218 }
3219
da8513c9
GU		 3220 fb_videomode_to_modelist(atafb_modedb, NUM_TOTAL_MODES,
3221 &fb_info.modelist);
3222
a1005012
MS		 3223 atafb_set_disp(&fb_info);
3224
3225 fb_alloc_cmap(&(fb_info.cmap), 1 << fb_info.var.bits_per_pixel, 0);
3226
3227
3228 printk("Determined %dx%d, depth %d\n",
3229 fb_info.var.xres, fb_info.var.yres, fb_info.var.bits_per_pixel);
3230 if ((fb_info.var.xres != fb_info.var.xres_virtual) ||
3231 (fb_info.var.yres != fb_info.var.yres_virtual))
3232 printk(" virtual %dx%d\n", fb_info.var.xres_virtual,
3233 fb_info.var.yres_virtual);
3234
3235 if (register_framebuffer(&fb_info) < 0) {
3236#ifdef ATAFB_EXT
3237 if (external_addr) {
3238 iounmap(external_addr);
3239 external_addr = NULL;
3240 }
3241 if (external_vgaiobase) {
3242 iounmap((void*)external_vgaiobase);
3243 external_vgaiobase = 0;
3244 }
1da177e4 3245#endif
a1005012
MS		 3246 return -EINVAL;
3247 }
3248
3249 // FIXME: mode needs setting!
3250 //printk("fb%d: %s frame buffer device, using %dK of video memory\n",
3251 // fb_info.node, fb_info.mode->name, screen_len>>10);
3252 printk("fb%d: frame buffer device, using %dK of video memory\n",
3253 fb_info.node, screen_len >> 10);
3254
3255 /* TODO: This driver cannot be unloaded yet */
3256 return 0;
1da177e4
LT		 3257}
3258
a1005012
MS		 3259module_init(atafb_init);
3260
1da177e4
LT		 3261#ifdef MODULE
3262MODULE_LICENSE("GPL");
3263
a1005012 3264int cleanup_module(void)
1da177e4 3265{
a1005012
MS		 3266 unregister_framebuffer(&fb_info);
3267 return atafb_deinit();
1da177e4
LT		 3268}
3269#endif /* MODULE */
Linux 6.x block layer and io_uring tree(s)