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[pohmelfs.git] / drivers / video / cirrusfb.c
blob738c8ce7d132d1aaa88c3c625f5a6bc51aa04d72
1 /*
2 * drivers/video/cirrusfb.c - driver for Cirrus Logic chipsets
3 *
4 * Copyright 1999-2001 Jeff Garzik <jgarzik@pobox.com>
5 *
6 * Contributors (thanks, all!)
7 *
8 * David Eger:
9 * Overhaul for Linux 2.6
10 *
11 * Jeff Rugen:
12 * Major contributions; Motorola PowerStack (PPC and PCI) support,
13 * GD54xx, 1280x1024 mode support, change MCLK based on VCLK.
14 *
15 * Geert Uytterhoeven:
16 * Excellent code review.
17 *
18 * Lars Hecking:
19 * Amiga updates and testing.
20 *
21 * Original cirrusfb author: Frank Neumann
22 *
23 * Based on retz3fb.c and cirrusfb.c:
24 * Copyright (C) 1997 Jes Sorensen
25 * Copyright (C) 1996 Frank Neumann
26 *
27 ***************************************************************
28 *
29 * Format this code with GNU indent '-kr -i8 -pcs' options.
30 *
31 * This file is subject to the terms and conditions of the GNU General Public
32 * License. See the file COPYING in the main directory of this archive
33 * for more details.
34 *
35 */
36
37 #include <linux/module.h>
38 #include <linux/kernel.h>
39 #include <linux/errno.h>
40 #include <linux/string.h>
41 #include <linux/mm.h>
42 #include <linux/delay.h>
43 #include <linux/fb.h>
44 #include <linux/init.h>
45 #include <asm/pgtable.h>
46
47 #ifdef CONFIG_ZORRO
48 #include <linux/zorro.h>
49 #endif
50 #ifdef CONFIG_PCI
51 #include <linux/pci.h>
52 #endif
53 #ifdef CONFIG_AMIGA
54 #include <asm/amigahw.h>
55 #endif
56 #ifdef CONFIG_PPC_PREP
57 #include <asm/machdep.h>
58 #define isPReP machine_is(prep)
59 #else
60 #define isPReP 0
61 #endif
62
63 #include <video/vga.h>
64 #include <video/cirrus.h>
65
66 /*****************************************************************
67 *
68 * debugging and utility macros
69 *
70 */
71
72 /* disable runtime assertions? */
73 /* #define CIRRUSFB_NDEBUG */
74
75 /* debugging assertions */
76 #ifndef CIRRUSFB_NDEBUG
77 #define assert(expr) \
78 if (!(expr)) { \
79 printk("Assertion failed! %s,%s,%s,line=%d\n", \
80 #expr, __FILE__, __func__, __LINE__); \
81 }
82 #else
83 #define assert(expr)
84 #endif
85
86 #define MB_ (1024 * 1024)
87
88 /*****************************************************************
89 *
90 * chipset information
91 *
92 */
93
94 /* board types */
95 enum cirrus_board {
96 BT_NONE = 0,
97 BT_SD64, /* GD5434 */
98 BT_PICCOLO, /* GD5426 */
99 BT_PICASSO, /* GD5426 or GD5428 */
100 BT_SPECTRUM, /* GD5426 or GD5428 */
101 BT_PICASSO4, /* GD5446 */
102 BT_ALPINE, /* GD543x/4x */
103 BT_GD5480,
104 BT_LAGUNA, /* GD5462/64 */
105 BT_LAGUNAB, /* GD5465 */
106 };
107
108 /*
109 * per-board-type information, used for enumerating and abstracting
110 * chip-specific information
111 * NOTE: MUST be in the same order as enum cirrus_board in order to
112 * use direct indexing on this array
113 * NOTE: '__initdata' cannot be used as some of this info
114 * is required at runtime. Maybe separate into an init-only and
115 * a run-time table?
116 */
117 static const struct cirrusfb_board_info_rec {
118 char *name; /* ASCII name of chipset */
119 long maxclock[5]; /* maximum video clock */
120 /* for 1/4bpp, 8bpp 15/16bpp, 24bpp, 32bpp - numbers from xorg code */
121 bool init_sr07 : 1; /* init SR07 during init_vgachip() */
122 bool init_sr1f : 1; /* write SR1F during init_vgachip() */
123 /* construct bit 19 of screen start address */
124 bool scrn_start_bit19 : 1;
125
126 /* initial SR07 value, then for each mode */
127 unsigned char sr07;
128 unsigned char sr07_1bpp;
129 unsigned char sr07_1bpp_mux;
130 unsigned char sr07_8bpp;
131 unsigned char sr07_8bpp_mux;
132
133 unsigned char sr1f; /* SR1F VGA initial register value */
134 } cirrusfb_board_info[] = {
135 [BT_SD64] = {
136 .name = "CL SD64",
137 .maxclock = {
138 /* guess */
139 /* the SD64/P4 have a higher max. videoclock */
140 135100, 135100, 85500, 85500, 0
141 },
142 .init_sr07 = true,
143 .init_sr1f = true,
144 .scrn_start_bit19 = true,
145 .sr07 = 0xF0,
146 .sr07_1bpp = 0xF0,
147 .sr07_1bpp_mux = 0xF6,
148 .sr07_8bpp = 0xF1,
149 .sr07_8bpp_mux = 0xF7,
150 .sr1f = 0x1E
151 },
152 [BT_PICCOLO] = {
153 .name = "CL Piccolo",
154 .maxclock = {
155 /* guess */
156 90000, 90000, 90000, 90000, 90000
157 },
158 .init_sr07 = true,
159 .init_sr1f = true,
160 .scrn_start_bit19 = false,
161 .sr07 = 0x80,
162 .sr07_1bpp = 0x80,
163 .sr07_8bpp = 0x81,
164 .sr1f = 0x22
165 },
166 [BT_PICASSO] = {
167 .name = "CL Picasso",
168 .maxclock = {
169 /* guess */
170 90000, 90000, 90000, 90000, 90000
171 },
172 .init_sr07 = true,
173 .init_sr1f = true,
174 .scrn_start_bit19 = false,
175 .sr07 = 0x20,
176 .sr07_1bpp = 0x20,
177 .sr07_8bpp = 0x21,
178 .sr1f = 0x22
179 },
180 [BT_SPECTRUM] = {
181 .name = "CL Spectrum",
182 .maxclock = {
183 /* guess */
184 90000, 90000, 90000, 90000, 90000
185 },
186 .init_sr07 = true,
187 .init_sr1f = true,
188 .scrn_start_bit19 = false,
189 .sr07 = 0x80,
190 .sr07_1bpp = 0x80,
191 .sr07_8bpp = 0x81,
192 .sr1f = 0x22
193 },
194 [BT_PICASSO4] = {
195 .name = "CL Picasso4",
196 .maxclock = {
197 135100, 135100, 85500, 85500, 0
198 },
199 .init_sr07 = true,
200 .init_sr1f = false,
201 .scrn_start_bit19 = true,
202 .sr07 = 0xA0,
203 .sr07_1bpp = 0xA0,
204 .sr07_1bpp_mux = 0xA6,
205 .sr07_8bpp = 0xA1,
206 .sr07_8bpp_mux = 0xA7,
207 .sr1f = 0
208 },
209 [BT_ALPINE] = {
210 .name = "CL Alpine",
211 .maxclock = {
212 /* for the GD5430. GD5446 can do more... */
213 85500, 85500, 50000, 28500, 0
214 },
215 .init_sr07 = true,
216 .init_sr1f = true,
217 .scrn_start_bit19 = true,
218 .sr07 = 0xA0,
219 .sr07_1bpp = 0xA0,
220 .sr07_1bpp_mux = 0xA6,
221 .sr07_8bpp = 0xA1,
222 .sr07_8bpp_mux = 0xA7,
223 .sr1f = 0x1C
224 },
225 [BT_GD5480] = {
226 .name = "CL GD5480",
227 .maxclock = {
228 135100, 200000, 200000, 135100, 135100
229 },
230 .init_sr07 = true,
231 .init_sr1f = true,
232 .scrn_start_bit19 = true,
233 .sr07 = 0x10,
234 .sr07_1bpp = 0x11,
235 .sr07_8bpp = 0x11,
236 .sr1f = 0x1C
237 },
238 [BT_LAGUNA] = {
239 .name = "CL Laguna",
240 .maxclock = {
241 /* taken from X11 code */
242 170000, 170000, 170000, 170000, 135100,
243 },
244 .init_sr07 = false,
245 .init_sr1f = false,
246 .scrn_start_bit19 = true,
247 },
248 [BT_LAGUNAB] = {
249 .name = "CL Laguna AGP",
250 .maxclock = {
251 /* taken from X11 code */
252 170000, 250000, 170000, 170000, 135100,
253 },
254 .init_sr07 = false,
255 .init_sr1f = false,
256 .scrn_start_bit19 = true,
257 }
258 };
259
260 #ifdef CONFIG_PCI
261 #define CHIP(id, btype) \
262 { PCI_VENDOR_ID_CIRRUS, id, PCI_ANY_ID, PCI_ANY_ID, 0, 0, (btype) }
263
264 static struct pci_device_id cirrusfb_pci_table[] = {
265 CHIP(PCI_DEVICE_ID_CIRRUS_5436, BT_ALPINE),
266 CHIP(PCI_DEVICE_ID_CIRRUS_5434_8, BT_SD64),
267 CHIP(PCI_DEVICE_ID_CIRRUS_5434_4, BT_SD64),
268 CHIP(PCI_DEVICE_ID_CIRRUS_5430, BT_ALPINE), /* GD-5440 is same id */
269 CHIP(PCI_DEVICE_ID_CIRRUS_7543, BT_ALPINE),
270 CHIP(PCI_DEVICE_ID_CIRRUS_7548, BT_ALPINE),
271 CHIP(PCI_DEVICE_ID_CIRRUS_5480, BT_GD5480), /* MacPicasso likely */
272 CHIP(PCI_DEVICE_ID_CIRRUS_5446, BT_PICASSO4), /* Picasso 4 is 5446 */
273 CHIP(PCI_DEVICE_ID_CIRRUS_5462, BT_LAGUNA), /* CL Laguna */
274 CHIP(PCI_DEVICE_ID_CIRRUS_5464, BT_LAGUNA), /* CL Laguna 3D */
275 CHIP(PCI_DEVICE_ID_CIRRUS_5465, BT_LAGUNAB), /* CL Laguna 3DA*/
276 { 0, }
277 };
278 MODULE_DEVICE_TABLE(pci, cirrusfb_pci_table);
279 #undef CHIP
280 #endif /* CONFIG_PCI */
281
282 #ifdef CONFIG_ZORRO
283 struct zorrocl {
284 enum cirrus_board type; /* Board type */
285 u32 regoffset; /* Offset of registers in first Zorro device */
286 u32 ramsize; /* Size of video RAM in first Zorro device */
287 /* If zero, use autoprobe on RAM device */
288 u32 ramoffset; /* Offset of video RAM in first Zorro device */
289 zorro_id ramid; /* Zorro ID of RAM device */
290 zorro_id ramid2; /* Zorro ID of optional second RAM device */
291 };
292
293 static const struct zorrocl zcl_sd64 __devinitconst = {
294 .type = BT_SD64,
295 .ramid = ZORRO_PROD_HELFRICH_SD64_RAM,
296 };
297
298 static const struct zorrocl zcl_piccolo __devinitconst = {
299 .type = BT_PICCOLO,
300 .ramid = ZORRO_PROD_HELFRICH_PICCOLO_RAM,
301 };
302
303 static const struct zorrocl zcl_picasso __devinitconst = {
304 .type = BT_PICASSO,
305 .ramid = ZORRO_PROD_VILLAGE_TRONIC_PICASSO_II_II_PLUS_RAM,
306 };
307
308 static const struct zorrocl zcl_spectrum __devinitconst = {
309 .type = BT_SPECTRUM,
310 .ramid = ZORRO_PROD_GVP_EGS_28_24_SPECTRUM_RAM,
311 };
312
313 static const struct zorrocl zcl_picasso4_z3 __devinitconst = {
314 .type = BT_PICASSO4,
315 .regoffset = 0x00600000,
316 .ramsize = 4 * MB_,
317 .ramoffset = 0x01000000, /* 0x02000000 for 64 MiB boards */
318 };
319
320 static const struct zorrocl zcl_picasso4_z2 __devinitconst = {
321 .type = BT_PICASSO4,
322 .regoffset = 0x10000,
323 .ramid = ZORRO_PROD_VILLAGE_TRONIC_PICASSO_IV_Z2_RAM1,
324 .ramid2 = ZORRO_PROD_VILLAGE_TRONIC_PICASSO_IV_Z2_RAM2,
325 };
326
327
328 static const struct zorro_device_id cirrusfb_zorro_table[] __devinitconst = {
329 {
330 .id = ZORRO_PROD_HELFRICH_SD64_REG,
331 .driver_data = (unsigned long)&zcl_sd64,
332 }, {
333 .id = ZORRO_PROD_HELFRICH_PICCOLO_REG,
334 .driver_data = (unsigned long)&zcl_piccolo,
335 }, {
336 .id = ZORRO_PROD_VILLAGE_TRONIC_PICASSO_II_II_PLUS_REG,
337 .driver_data = (unsigned long)&zcl_picasso,
338 }, {
339 .id = ZORRO_PROD_GVP_EGS_28_24_SPECTRUM_REG,
340 .driver_data = (unsigned long)&zcl_spectrum,
341 }, {
342 .id = ZORRO_PROD_VILLAGE_TRONIC_PICASSO_IV_Z3,
343 .driver_data = (unsigned long)&zcl_picasso4_z3,
344 }, {
345 .id = ZORRO_PROD_VILLAGE_TRONIC_PICASSO_IV_Z2_REG,
346 .driver_data = (unsigned long)&zcl_picasso4_z2,
347 },
348 { 0 }
349 };
350 MODULE_DEVICE_TABLE(zorro, cirrusfb_zorro_table);
351 #endif /* CONFIG_ZORRO */
352
353 #ifdef CIRRUSFB_DEBUG
354 enum cirrusfb_dbg_reg_class {
355 CRT,
356 SEQ
357 };
358 #endif /* CIRRUSFB_DEBUG */
359
360 /* info about board */
361 struct cirrusfb_info {
362 u8 __iomem *regbase;
363 u8 __iomem *laguna_mmio;
364 enum cirrus_board btype;
365 unsigned char SFR; /* Shadow of special function register */
366
367 int multiplexing;
368 int doubleVCLK;
369 int blank_mode;
370 u32 pseudo_palette[16];
371
372 void (*unmap)(struct fb_info *info);
373 };
374
375 static bool noaccel __devinitdata;
376 static char *mode_option __devinitdata = "640x480@60";
377
378 /****************************************************************************/
379 /**** BEGIN PROTOTYPES ******************************************************/
380
381 /*--- Interface used by the world ------------------------------------------*/
382 static int cirrusfb_pan_display(struct fb_var_screeninfo *var,
383 struct fb_info *info);
384
385 /*--- Internal routines ----------------------------------------------------*/
386 static void init_vgachip(struct fb_info *info);
387 static void switch_monitor(struct cirrusfb_info *cinfo, int on);
388 static void WGen(const struct cirrusfb_info *cinfo,
389 int regnum, unsigned char val);
390 static unsigned char RGen(const struct cirrusfb_info *cinfo, int regnum);
391 static void AttrOn(const struct cirrusfb_info *cinfo);
392 static void WHDR(const struct cirrusfb_info *cinfo, unsigned char val);
393 static void WSFR(struct cirrusfb_info *cinfo, unsigned char val);
394 static void WSFR2(struct cirrusfb_info *cinfo, unsigned char val);
395 static void WClut(struct cirrusfb_info *cinfo, unsigned char regnum,
396 unsigned char red, unsigned char green, unsigned char blue);
397 #if 0
398 static void RClut(struct cirrusfb_info *cinfo, unsigned char regnum,
399 unsigned char *red, unsigned char *green,
400 unsigned char *blue);
401 #endif
402 static void cirrusfb_WaitBLT(u8 __iomem *regbase);
403 static void cirrusfb_BitBLT(u8 __iomem *regbase, int bits_per_pixel,
404 u_short curx, u_short cury,
405 u_short destx, u_short desty,
406 u_short width, u_short height,
407 u_short line_length);
408 static void cirrusfb_RectFill(u8 __iomem *regbase, int bits_per_pixel,
409 u_short x, u_short y,
410 u_short width, u_short height,
411 u32 fg_color, u32 bg_color,
412 u_short line_length, u_char blitmode);
413
414 static void bestclock(long freq, int *nom, int *den, int *div);
415
416 #ifdef CIRRUSFB_DEBUG
417 static void cirrusfb_dbg_reg_dump(struct fb_info *info, caddr_t regbase);
418 static void cirrusfb_dbg_print_regs(struct fb_info *info,
419 caddr_t regbase,
420 enum cirrusfb_dbg_reg_class reg_class, ...);
421 #endif /* CIRRUSFB_DEBUG */
422
423 /*** END PROTOTYPES ********************************************************/
424 /*****************************************************************************/
425 /*** BEGIN Interface Used by the World ***************************************/
426
427 static inline int is_laguna(const struct cirrusfb_info *cinfo)
428 {
429 return cinfo->btype == BT_LAGUNA || cinfo->btype == BT_LAGUNAB;
430 }
431
432 static int opencount;
433
434 /*--- Open /dev/fbx ---------------------------------------------------------*/
435 static int cirrusfb_open(struct fb_info *info, int user)
436 {
437 if (opencount++ == 0)
438 switch_monitor(info->par, 1);
439 return 0;
440 }
441
442 /*--- Close /dev/fbx --------------------------------------------------------*/
443 static int cirrusfb_release(struct fb_info *info, int user)
444 {
445 if (--opencount == 0)
446 switch_monitor(info->par, 0);
447 return 0;
448 }
449
450 /**** END Interface used by the World *************************************/
451 /****************************************************************************/
452 /**** BEGIN Hardware specific Routines **************************************/
453
454 /* Check if the MCLK is not a better clock source */
455 static int cirrusfb_check_mclk(struct fb_info *info, long freq)
456 {
457 struct cirrusfb_info *cinfo = info->par;
458 long mclk = vga_rseq(cinfo->regbase, CL_SEQR1F) & 0x3f;
459
460 /* Read MCLK value */
461 mclk = (14318 * mclk) >> 3;
462 dev_dbg(info->device, "Read MCLK of %ld kHz\n", mclk);
463
464 /* Determine if we should use MCLK instead of VCLK, and if so, what we
465 * should divide it by to get VCLK
466 */
467
468 if (abs(freq - mclk) < 250) {
469 dev_dbg(info->device, "Using VCLK = MCLK\n");
470 return 1;
471 } else if (abs(freq - (mclk / 2)) < 250) {
472 dev_dbg(info->device, "Using VCLK = MCLK/2\n");
473 return 2;
474 }
475
476 return 0;
477 }
478
479 static int cirrusfb_check_pixclock(const struct fb_var_screeninfo *var,
480 struct fb_info *info)
481 {
482 long freq;
483 long maxclock;
484 struct cirrusfb_info *cinfo = info->par;
485 unsigned maxclockidx = var->bits_per_pixel >> 3;
486
487 /* convert from ps to kHz */
488 freq = PICOS2KHZ(var->pixclock);
489
490 dev_dbg(info->device, "desired pixclock: %ld kHz\n", freq);
491
492 maxclock = cirrusfb_board_info[cinfo->btype].maxclock[maxclockidx];
493 cinfo->multiplexing = 0;
494
495 /* If the frequency is greater than we can support, we might be able
496 * to use multiplexing for the video mode */
497 if (freq > maxclock) {
498 dev_err(info->device,
499 "Frequency greater than maxclock (%ld kHz)\n",
500 maxclock);
501 return -EINVAL;
502 }
503 /*
504 * Additional constraint: 8bpp uses DAC clock doubling to allow maximum
505 * pixel clock
506 */
507 if (var->bits_per_pixel == 8) {
508 switch (cinfo->btype) {
509 case BT_ALPINE:
510 case BT_SD64:
511 case BT_PICASSO4:
512 if (freq > 85500)
513 cinfo->multiplexing = 1;
514 break;
515 case BT_GD5480:
516 if (freq > 135100)
517 cinfo->multiplexing = 1;
518 break;
519
520 default:
521 break;
522 }
523 }
524
525 /* If we have a 1MB 5434, we need to put ourselves in a mode where
526 * the VCLK is double the pixel clock. */
527 cinfo->doubleVCLK = 0;
528 if (cinfo->btype == BT_SD64 && info->fix.smem_len <= MB_ &&
529 var->bits_per_pixel == 16) {
530 cinfo->doubleVCLK = 1;
531 }
532
533 return 0;
534 }
535
536 static int cirrusfb_check_var(struct fb_var_screeninfo *var,
537 struct fb_info *info)
538 {
539 int yres;
540 /* memory size in pixels */
541 unsigned pixels = info->screen_size * 8 / var->bits_per_pixel;
542 struct cirrusfb_info *cinfo = info->par;
543
544 switch (var->bits_per_pixel) {
545 case 1:
546 var->red.offset = 0;
547 var->red.length = 1;
548 var->green = var->red;
549 var->blue = var->red;
550 break;
551
552 case 8:
553 var->red.offset = 0;
554 var->red.length = 8;
555 var->green = var->red;
556 var->blue = var->red;
557 break;
558
559 case 16:
560 if (isPReP) {
561 var->red.offset = 2;
562 var->green.offset = -3;
563 var->blue.offset = 8;
564 } else {
565 var->red.offset = 11;
566 var->green.offset = 5;
567 var->blue.offset = 0;
568 }
569 var->red.length = 5;
570 var->green.length = 6;
571 var->blue.length = 5;
572 break;
573
574 case 24:
575 if (isPReP) {
576 var->red.offset = 0;
577 var->green.offset = 8;
578 var->blue.offset = 16;
579 } else {
580 var->red.offset = 16;
581 var->green.offset = 8;
582 var->blue.offset = 0;
583 }
584 var->red.length = 8;
585 var->green.length = 8;
586 var->blue.length = 8;
587 break;
588
589 default:
590 dev_dbg(info->device,
591 "Unsupported bpp size: %d\n", var->bits_per_pixel);
592 return -EINVAL;
593 }
594
595 if (var->xres_virtual < var->xres)
596 var->xres_virtual = var->xres;
597 /* use highest possible virtual resolution */
598 if (var->yres_virtual == -1) {
599 var->yres_virtual = pixels / var->xres_virtual;
600
601 dev_info(info->device,
602 "virtual resolution set to maximum of %dx%d\n",
603 var->xres_virtual, var->yres_virtual);
604 }
605 if (var->yres_virtual < var->yres)
606 var->yres_virtual = var->yres;
607
608 if (var->xres_virtual * var->yres_virtual > pixels) {
609 dev_err(info->device, "mode %dx%dx%d rejected... "
610 "virtual resolution too high to fit into video memory!\n",
611 var->xres_virtual, var->yres_virtual,
612 var->bits_per_pixel);
613 return -EINVAL;
614 }
615
616 if (var->xoffset < 0)
617 var->xoffset = 0;
618 if (var->yoffset < 0)
619 var->yoffset = 0;
620
621 /* truncate xoffset and yoffset to maximum if too high */
622 if (var->xoffset > var->xres_virtual - var->xres)
623 var->xoffset = var->xres_virtual - var->xres - 1;
624 if (var->yoffset > var->yres_virtual - var->yres)
625 var->yoffset = var->yres_virtual - var->yres - 1;
626
627 var->red.msb_right =
628 var->green.msb_right =
629 var->blue.msb_right =
630 var->transp.offset =
631 var->transp.length =
632 var->transp.msb_right = 0;
633
634 yres = var->yres;
635 if (var->vmode & FB_VMODE_DOUBLE)
636 yres *= 2;
637 else if (var->vmode & FB_VMODE_INTERLACED)
638 yres = (yres + 1) / 2;
639
640 if (yres >= 1280) {
641 dev_err(info->device, "ERROR: VerticalTotal >= 1280; "
642 "special treatment required! (TODO)\n");
643 return -EINVAL;
644 }
645
646 if (cirrusfb_check_pixclock(var, info))
647 return -EINVAL;
648
649 if (!is_laguna(cinfo))
650 var->accel_flags = FB_ACCELF_TEXT;
651
652 return 0;
653 }
654
655 static void cirrusfb_set_mclk_as_source(const struct fb_info *info, int div)
656 {
657 struct cirrusfb_info *cinfo = info->par;
658 unsigned char old1f, old1e;
659
660 assert(cinfo != NULL);
661 old1f = vga_rseq(cinfo->regbase, CL_SEQR1F) & ~0x40;
662
663 if (div) {
664 dev_dbg(info->device, "Set %s as pixclock source.\n",
665 (div == 2) ? "MCLK/2" : "MCLK");
666 old1f |= 0x40;
667 old1e = vga_rseq(cinfo->regbase, CL_SEQR1E) & ~0x1;
668 if (div == 2)
669 old1e |= 1;
670
671 vga_wseq(cinfo->regbase, CL_SEQR1E, old1e);
672 }
673 vga_wseq(cinfo->regbase, CL_SEQR1F, old1f);
674 }
675
676 /*************************************************************************
677 cirrusfb_set_par_foo()
678
679 actually writes the values for a new video mode into the hardware,
680 **************************************************************************/
681 static int cirrusfb_set_par_foo(struct fb_info *info)
682 {
683 struct cirrusfb_info *cinfo = info->par;
684 struct fb_var_screeninfo *var = &info->var;
685 u8 __iomem *regbase = cinfo->regbase;
686 unsigned char tmp;
687 int pitch;
688 const struct cirrusfb_board_info_rec *bi;
689 int hdispend, hsyncstart, hsyncend, htotal;
690 int yres, vdispend, vsyncstart, vsyncend, vtotal;
691 long freq;
692 int nom, den, div;
693 unsigned int control = 0, format = 0, threshold = 0;
694
695 dev_dbg(info->device, "Requested mode: %dx%dx%d\n",
696 var->xres, var->yres, var->bits_per_pixel);
697
698 switch (var->bits_per_pixel) {
699 case 1:
700 info->fix.line_length = var->xres_virtual / 8;
701 info->fix.visual = FB_VISUAL_MONO10;
702 break;
703
704 case 8:
705 info->fix.line_length = var->xres_virtual;
706 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
707 break;
708
709 case 16:
710 case 24:
711 info->fix.line_length = var->xres_virtual *
712 var->bits_per_pixel >> 3;
713 info->fix.visual = FB_VISUAL_TRUECOLOR;
714 break;
715 }
716 info->fix.type = FB_TYPE_PACKED_PIXELS;
717
718 init_vgachip(info);
719
720 bi = &cirrusfb_board_info[cinfo->btype];
721
722 hsyncstart = var->xres + var->right_margin;
723 hsyncend = hsyncstart + var->hsync_len;
724 htotal = (hsyncend + var->left_margin) / 8;
725 hdispend = var->xres / 8;
726 hsyncstart = hsyncstart / 8;
727 hsyncend = hsyncend / 8;
728
729 vdispend = var->yres;
730 vsyncstart = vdispend + var->lower_margin;
731 vsyncend = vsyncstart + var->vsync_len;
732 vtotal = vsyncend + var->upper_margin;
733
734 if (var->vmode & FB_VMODE_DOUBLE) {
735 vdispend *= 2;
736 vsyncstart *= 2;
737 vsyncend *= 2;
738 vtotal *= 2;
739 } else if (var->vmode & FB_VMODE_INTERLACED) {
740 vdispend = (vdispend + 1) / 2;
741 vsyncstart = (vsyncstart + 1) / 2;
742 vsyncend = (vsyncend + 1) / 2;
743 vtotal = (vtotal + 1) / 2;
744 }
745 yres = vdispend;
746 if (yres >= 1024) {
747 vtotal /= 2;
748 vsyncstart /= 2;
749 vsyncend /= 2;
750 vdispend /= 2;
751 }
752
753 vdispend -= 1;
754 vsyncstart -= 1;
755 vsyncend -= 1;
756 vtotal -= 2;
757
758 if (cinfo->multiplexing) {
759 htotal /= 2;
760 hsyncstart /= 2;
761 hsyncend /= 2;
762 hdispend /= 2;
763 }
764
765 htotal -= 5;
766 hdispend -= 1;
767 hsyncstart += 1;
768 hsyncend += 1;
769
770 /* unlock register VGA_CRTC_H_TOTAL..CRT7 */
771 vga_wcrt(regbase, VGA_CRTC_V_SYNC_END, 0x20); /* previously: 0x00) */
772
773 /* if debugging is enabled, all parameters get output before writing */
774 dev_dbg(info->device, "CRT0: %d\n", htotal);
775 vga_wcrt(regbase, VGA_CRTC_H_TOTAL, htotal);
776
777 dev_dbg(info->device, "CRT1: %d\n", hdispend);
778 vga_wcrt(regbase, VGA_CRTC_H_DISP, hdispend);
779
780 dev_dbg(info->device, "CRT2: %d\n", var->xres / 8);
781 vga_wcrt(regbase, VGA_CRTC_H_BLANK_START, var->xres / 8);
782
783 /* + 128: Compatible read */
784 dev_dbg(info->device, "CRT3: 128+%d\n", (htotal + 5) % 32);
785 vga_wcrt(regbase, VGA_CRTC_H_BLANK_END,
786 128 + ((htotal + 5) % 32));
787
788 dev_dbg(info->device, "CRT4: %d\n", hsyncstart);
789 vga_wcrt(regbase, VGA_CRTC_H_SYNC_START, hsyncstart);
790
791 tmp = hsyncend % 32;
792 if ((htotal + 5) & 32)
793 tmp += 128;
794 dev_dbg(info->device, "CRT5: %d\n", tmp);
795 vga_wcrt(regbase, VGA_CRTC_H_SYNC_END, tmp);
796
797 dev_dbg(info->device, "CRT6: %d\n", vtotal & 0xff);
798 vga_wcrt(regbase, VGA_CRTC_V_TOTAL, vtotal & 0xff);
799
800 tmp = 16; /* LineCompare bit #9 */
801 if (vtotal & 256)
802 tmp |= 1;
803 if (vdispend & 256)
804 tmp |= 2;
805 if (vsyncstart & 256)
806 tmp |= 4;
807 if ((vdispend + 1) & 256)
808 tmp |= 8;
809 if (vtotal & 512)
810 tmp |= 32;
811 if (vdispend & 512)
812 tmp |= 64;
813 if (vsyncstart & 512)
814 tmp |= 128;
815 dev_dbg(info->device, "CRT7: %d\n", tmp);
816 vga_wcrt(regbase, VGA_CRTC_OVERFLOW, tmp);
817
818 tmp = 0x40; /* LineCompare bit #8 */
819 if ((vdispend + 1) & 512)
820 tmp |= 0x20;
821 if (var->vmode & FB_VMODE_DOUBLE)
822 tmp |= 0x80;
823 dev_dbg(info->device, "CRT9: %d\n", tmp);
824 vga_wcrt(regbase, VGA_CRTC_MAX_SCAN, tmp);
825
826 dev_dbg(info->device, "CRT10: %d\n", vsyncstart & 0xff);
827 vga_wcrt(regbase, VGA_CRTC_V_SYNC_START, vsyncstart & 0xff);
828
829 dev_dbg(info->device, "CRT11: 64+32+%d\n", vsyncend % 16);
830 vga_wcrt(regbase, VGA_CRTC_V_SYNC_END, vsyncend % 16 + 64 + 32);
831
832 dev_dbg(info->device, "CRT12: %d\n", vdispend & 0xff);
833 vga_wcrt(regbase, VGA_CRTC_V_DISP_END, vdispend & 0xff);
834
835 dev_dbg(info->device, "CRT15: %d\n", (vdispend + 1) & 0xff);
836 vga_wcrt(regbase, VGA_CRTC_V_BLANK_START, (vdispend + 1) & 0xff);
837
838 dev_dbg(info->device, "CRT16: %d\n", vtotal & 0xff);
839 vga_wcrt(regbase, VGA_CRTC_V_BLANK_END, vtotal & 0xff);
840
841 dev_dbg(info->device, "CRT18: 0xff\n");
842 vga_wcrt(regbase, VGA_CRTC_LINE_COMPARE, 0xff);
843
844 tmp = 0;
845 if (var->vmode & FB_VMODE_INTERLACED)
846 tmp |= 1;
847 if ((htotal + 5) & 64)
848 tmp |= 16;
849 if ((htotal + 5) & 128)
850 tmp |= 32;
851 if (vtotal & 256)
852 tmp |= 64;
853 if (vtotal & 512)
854 tmp |= 128;
855
856 dev_dbg(info->device, "CRT1a: %d\n", tmp);
857 vga_wcrt(regbase, CL_CRT1A, tmp);
858
859 freq = PICOS2KHZ(var->pixclock);
860 if (var->bits_per_pixel == 24)
861 if (cinfo->btype == BT_ALPINE || cinfo->btype == BT_SD64)
862 freq *= 3;
863 if (cinfo->multiplexing)
864 freq /= 2;
865 if (cinfo->doubleVCLK)
866 freq *= 2;
867
868 bestclock(freq, &nom, &den, &div);
869
870 dev_dbg(info->device, "VCLK freq: %ld kHz nom: %d den: %d div: %d\n",
871 freq, nom, den, div);
872
873 /* set VCLK0 */
874 /* hardware RefClock: 14.31818 MHz */
875 /* formula: VClk = (OSC * N) / (D * (1+P)) */
876 /* Example: VClk = (14.31818 * 91) / (23 * (1+1)) = 28.325 MHz */
877
878 if (cinfo->btype == BT_ALPINE || cinfo->btype == BT_PICASSO4 ||
879 cinfo->btype == BT_SD64) {
880 /* if freq is close to mclk or mclk/2 select mclk
881 * as clock source
882 */
883 int divMCLK = cirrusfb_check_mclk(info, freq);
884 if (divMCLK)
885 nom = 0;
886 cirrusfb_set_mclk_as_source(info, divMCLK);
887 }
888 if (is_laguna(cinfo)) {
889 long pcifc = fb_readl(cinfo->laguna_mmio + 0x3fc);
890 unsigned char tile = fb_readb(cinfo->laguna_mmio + 0x407);
891 unsigned short tile_control;
892
893 if (cinfo->btype == BT_LAGUNAB) {
894 tile_control = fb_readw(cinfo->laguna_mmio + 0x2c4);
895 tile_control &= ~0x80;
896 fb_writew(tile_control, cinfo->laguna_mmio + 0x2c4);
897 }
898
899 fb_writel(pcifc | 0x10000000l, cinfo->laguna_mmio + 0x3fc);
900 fb_writeb(tile & 0x3f, cinfo->laguna_mmio + 0x407);
901 control = fb_readw(cinfo->laguna_mmio + 0x402);
902 threshold = fb_readw(cinfo->laguna_mmio + 0xea);
903 control &= ~0x6800;
904 format = 0;
905 threshold &= 0xffc0 & 0x3fbf;
906 }
907 if (nom) {
908 tmp = den << 1;
909 if (div != 0)
910 tmp |= 1;
911 /* 6 bit denom; ONLY 5434!!! (bugged me 10 days) */
912 if ((cinfo->btype == BT_SD64) ||
913 (cinfo->btype == BT_ALPINE) ||
914 (cinfo->btype == BT_GD5480))
915 tmp |= 0x80;
916
917 /* Laguna chipset has reversed clock registers */
918 if (is_laguna(cinfo)) {
919 vga_wseq(regbase, CL_SEQRE, tmp);
920 vga_wseq(regbase, CL_SEQR1E, nom);
921 } else {
922 vga_wseq(regbase, CL_SEQRE, nom);
923 vga_wseq(regbase, CL_SEQR1E, tmp);
924 }
925 }
926
927 if (yres >= 1024)
928 /* 1280x1024 */
929 vga_wcrt(regbase, VGA_CRTC_MODE, 0xc7);
930 else
931 /* mode control: VGA_CRTC_START_HI enable, ROTATE(?), 16bit
932 * address wrap, no compat. */
933 vga_wcrt(regbase, VGA_CRTC_MODE, 0xc3);
934
935 /* don't know if it would hurt to also program this if no interlaced */
936 /* mode is used, but I feel better this way.. :-) */
937 if (var->vmode & FB_VMODE_INTERLACED)
938 vga_wcrt(regbase, VGA_CRTC_REGS, htotal / 2);
939 else
940 vga_wcrt(regbase, VGA_CRTC_REGS, 0x00); /* interlace control */
941
942 /* adjust horizontal/vertical sync type (low/high), use VCLK3 */
943 /* enable display memory & CRTC I/O address for color mode */
944 tmp = 0x03 | 0xc;
945 if (var->sync & FB_SYNC_HOR_HIGH_ACT)
946 tmp |= 0x40;
947 if (var->sync & FB_SYNC_VERT_HIGH_ACT)
948 tmp |= 0x80;
949 WGen(cinfo, VGA_MIS_W, tmp);
950
951 /* text cursor on and start line */
952 vga_wcrt(regbase, VGA_CRTC_CURSOR_START, 0);
953 /* text cursor end line */
954 vga_wcrt(regbase, VGA_CRTC_CURSOR_END, 31);
955
956 /******************************************************
957 *
958 * 1 bpp
959 *
960 */
961
962 /* programming for different color depths */
963 if (var->bits_per_pixel == 1) {
964 dev_dbg(info->device, "preparing for 1 bit deep display\n");
965 vga_wgfx(regbase, VGA_GFX_MODE, 0); /* mode register */
966
967 /* SR07 */
968 switch (cinfo->btype) {
969 case BT_SD64:
970 case BT_PICCOLO:
971 case BT_PICASSO:
972 case BT_SPECTRUM:
973 case BT_PICASSO4:
974 case BT_ALPINE:
975 case BT_GD5480:
976 vga_wseq(regbase, CL_SEQR7,
977 cinfo->multiplexing ?
978 bi->sr07_1bpp_mux : bi->sr07_1bpp);
979 break;
980
981 case BT_LAGUNA:
982 case BT_LAGUNAB:
983 vga_wseq(regbase, CL_SEQR7,
984 vga_rseq(regbase, CL_SEQR7) & ~0x01);
985 break;
986
987 default:
988 dev_warn(info->device, "unknown Board\n");
989 break;
990 }
991
992 /* Extended Sequencer Mode */
993 switch (cinfo->btype) {
994
995 case BT_PICCOLO:
996 case BT_SPECTRUM:
997 /* evtl d0 bei 1 bit? avoid FIFO underruns..? */
998 vga_wseq(regbase, CL_SEQRF, 0xb0);
999 break;
1000
1001 case BT_PICASSO:
1002 /* ## vorher d0 avoid FIFO underruns..? */
1003 vga_wseq(regbase, CL_SEQRF, 0xd0);
1004 break;
1005
1006 case BT_SD64:
1007 case BT_PICASSO4:
1008 case BT_ALPINE:
1009 case BT_GD5480:
1010 case BT_LAGUNA:
1011 case BT_LAGUNAB:
1012 /* do nothing */
1013 break;
1014
1015 default:
1016 dev_warn(info->device, "unknown Board\n");
1017 break;
1018 }
1019
1020 /* pixel mask: pass-through for first plane */
1021 WGen(cinfo, VGA_PEL_MSK, 0x01);
1022 if (cinfo->multiplexing)
1023 /* hidden dac reg: 1280x1024 */
1024 WHDR(cinfo, 0x4a);
1025 else
1026 /* hidden dac: nothing */
1027 WHDR(cinfo, 0);
1028 /* memory mode: odd/even, ext. memory */
1029 vga_wseq(regbase, VGA_SEQ_MEMORY_MODE, 0x06);
1030 /* plane mask: only write to first plane */
1031 vga_wseq(regbase, VGA_SEQ_PLANE_WRITE, 0x01);
1032 }
1033
1034 /******************************************************
1035 *
1036 * 8 bpp
1037 *
1038 */
1039
1040 else if (var->bits_per_pixel == 8) {
1041 dev_dbg(info->device, "preparing for 8 bit deep display\n");
1042 switch (cinfo->btype) {
1043 case BT_SD64:
1044 case BT_PICCOLO:
1045 case BT_PICASSO:
1046 case BT_SPECTRUM:
1047 case BT_PICASSO4:
1048 case BT_ALPINE:
1049 case BT_GD5480:
1050 vga_wseq(regbase, CL_SEQR7,
1051 cinfo->multiplexing ?
1052 bi->sr07_8bpp_mux : bi->sr07_8bpp);
1053 break;
1054
1055 case BT_LAGUNA:
1056 case BT_LAGUNAB:
1057 vga_wseq(regbase, CL_SEQR7,
1058 vga_rseq(regbase, CL_SEQR7) | 0x01);
1059 threshold |= 0x10;
1060 break;
1061
1062 default:
1063 dev_warn(info->device, "unknown Board\n");
1064 break;
1065 }
1066
1067 switch (cinfo->btype) {
1068 case BT_PICCOLO:
1069 case BT_PICASSO:
1070 case BT_SPECTRUM:
1071 /* Fast Page-Mode writes */
1072 vga_wseq(regbase, CL_SEQRF, 0xb0);
1073 break;
1074
1075 case BT_PICASSO4:
1076 #ifdef CONFIG_ZORRO
1077 /* ### INCOMPLETE!! */
1078 vga_wseq(regbase, CL_SEQRF, 0xb8);
1079 #endif
1080 case BT_ALPINE:
1081 case BT_SD64:
1082 case BT_GD5480:
1083 case BT_LAGUNA:
1084 case BT_LAGUNAB:
1085 /* do nothing */
1086 break;
1087
1088 default:
1089 dev_warn(info->device, "unknown board\n");
1090 break;
1091 }
1092
1093 /* mode register: 256 color mode */
1094 vga_wgfx(regbase, VGA_GFX_MODE, 64);
1095 if (cinfo->multiplexing)
1096 /* hidden dac reg: 1280x1024 */
1097 WHDR(cinfo, 0x4a);
1098 else
1099 /* hidden dac: nothing */
1100 WHDR(cinfo, 0);
1101 }
1102
1103 /******************************************************
1104 *
1105 * 16 bpp
1106 *
1107 */
1108
1109 else if (var->bits_per_pixel == 16) {
1110 dev_dbg(info->device, "preparing for 16 bit deep display\n");
1111 switch (cinfo->btype) {
1112 case BT_PICCOLO:
1113 case BT_SPECTRUM:
1114 vga_wseq(regbase, CL_SEQR7, 0x87);
1115 /* Fast Page-Mode writes */
1116 vga_wseq(regbase, CL_SEQRF, 0xb0);
1117 break;
1118
1119 case BT_PICASSO:
1120 vga_wseq(regbase, CL_SEQR7, 0x27);
1121 /* Fast Page-Mode writes */
1122 vga_wseq(regbase, CL_SEQRF, 0xb0);
1123 break;
1124
1125 case BT_SD64:
1126 case BT_PICASSO4:
1127 case BT_ALPINE:
1128 /* Extended Sequencer Mode: 256c col. mode */
1129 vga_wseq(regbase, CL_SEQR7,
1130 cinfo->doubleVCLK ? 0xa3 : 0xa7);
1131 break;
1132
1133 case BT_GD5480:
1134 vga_wseq(regbase, CL_SEQR7, 0x17);
1135 /* We already set SRF and SR1F */
1136 break;
1137
1138 case BT_LAGUNA:
1139 case BT_LAGUNAB:
1140 vga_wseq(regbase, CL_SEQR7,
1141 vga_rseq(regbase, CL_SEQR7) & ~0x01);
1142 control |= 0x2000;
1143 format |= 0x1400;
1144 threshold |= 0x10;
1145 break;
1146
1147 default:
1148 dev_warn(info->device, "unknown Board\n");
1149 break;
1150 }
1151
1152 /* mode register: 256 color mode */
1153 vga_wgfx(regbase, VGA_GFX_MODE, 64);
1154 #ifdef CONFIG_PCI
1155 WHDR(cinfo, cinfo->doubleVCLK ? 0xe1 : 0xc1);
1156 #elif defined(CONFIG_ZORRO)
1157 /* FIXME: CONFIG_PCI and CONFIG_ZORRO may be defined both */
1158 WHDR(cinfo, 0xa0); /* hidden dac reg: nothing special */
1159 #endif
1160 }
1161
1162 /******************************************************
1163 *
1164 * 24 bpp
1165 *
1166 */
1167
1168 else if (var->bits_per_pixel == 24) {
1169 dev_dbg(info->device, "preparing for 24 bit deep display\n");
1170 switch (cinfo->btype) {
1171 case BT_PICCOLO:
1172 case BT_SPECTRUM:
1173 vga_wseq(regbase, CL_SEQR7, 0x85);
1174 /* Fast Page-Mode writes */
1175 vga_wseq(regbase, CL_SEQRF, 0xb0);
1176 break;
1177
1178 case BT_PICASSO:
1179 vga_wseq(regbase, CL_SEQR7, 0x25);
1180 /* Fast Page-Mode writes */
1181 vga_wseq(regbase, CL_SEQRF, 0xb0);
1182 break;
1183
1184 case BT_SD64:
1185 case BT_PICASSO4:
1186 case BT_ALPINE:
1187 /* Extended Sequencer Mode: 256c col. mode */
1188 vga_wseq(regbase, CL_SEQR7, 0xa5);
1189 break;
1190
1191 case BT_GD5480:
1192 vga_wseq(regbase, CL_SEQR7, 0x15);
1193 /* We already set SRF and SR1F */
1194 break;
1195
1196 case BT_LAGUNA:
1197 case BT_LAGUNAB:
1198 vga_wseq(regbase, CL_SEQR7,
1199 vga_rseq(regbase, CL_SEQR7) & ~0x01);
1200 control |= 0x4000;
1201 format |= 0x2400;
1202 threshold |= 0x20;
1203 break;
1204
1205 default:
1206 dev_warn(info->device, "unknown Board\n");
1207 break;
1208 }
1209
1210 /* mode register: 256 color mode */
1211 vga_wgfx(regbase, VGA_GFX_MODE, 64);
1212 /* hidden dac reg: 8-8-8 mode (24 or 32) */
1213 WHDR(cinfo, 0xc5);
1214 }
1215
1216 /******************************************************
1217 *
1218 * unknown/unsupported bpp
1219 *
1220 */
1221
1222 else
1223 dev_err(info->device,
1224 "What's this? requested color depth == %d.\n",
1225 var->bits_per_pixel);
1226
1227 pitch = info->fix.line_length >> 3;
1228 vga_wcrt(regbase, VGA_CRTC_OFFSET, pitch & 0xff);
1229 tmp = 0x22;
1230 if (pitch & 0x100)
1231 tmp |= 0x10; /* offset overflow bit */
1232
1233 /* screen start addr #16-18, fastpagemode cycles */
1234 vga_wcrt(regbase, CL_CRT1B, tmp);
1235
1236 /* screen start address bit 19 */
1237 if (cirrusfb_board_info[cinfo->btype].scrn_start_bit19)
1238 vga_wcrt(regbase, CL_CRT1D, (pitch >> 9) & 1);
1239
1240 if (is_laguna(cinfo)) {
1241 tmp = 0;
1242 if ((htotal + 5) & 256)
1243 tmp |= 128;
1244 if (hdispend & 256)
1245 tmp |= 64;
1246 if (hsyncstart & 256)
1247 tmp |= 48;
1248 if (vtotal & 1024)
1249 tmp |= 8;
1250 if (vdispend & 1024)
1251 tmp |= 4;
1252 if (vsyncstart & 1024)
1253 tmp |= 3;
1254
1255 vga_wcrt(regbase, CL_CRT1E, tmp);
1256 dev_dbg(info->device, "CRT1e: %d\n", tmp);
1257 }
1258
1259 /* pixel panning */
1260 vga_wattr(regbase, CL_AR33, 0);
1261
1262 /* [ EGS: SetOffset(); ] */
1263 /* From SetOffset(): Turn on VideoEnable bit in Attribute controller */
1264 AttrOn(cinfo);
1265
1266 if (is_laguna(cinfo)) {
1267 /* no tiles */
1268 fb_writew(control | 0x1000, cinfo->laguna_mmio + 0x402);
1269 fb_writew(format, cinfo->laguna_mmio + 0xc0);
1270 fb_writew(threshold, cinfo->laguna_mmio + 0xea);
1271 }
1272 /* finally, turn on everything - turn off "FullBandwidth" bit */
1273 /* also, set "DotClock%2" bit where requested */
1274 tmp = 0x01;
1275
1276 /*** FB_VMODE_CLOCK_HALVE in linux/fb.h not defined anymore ?
1277 if (var->vmode & FB_VMODE_CLOCK_HALVE)
1278 tmp |= 0x08;
1279 */
1280
1281 vga_wseq(regbase, VGA_SEQ_CLOCK_MODE, tmp);
1282 dev_dbg(info->device, "CL_SEQR1: %d\n", tmp);
1283
1284 #ifdef CIRRUSFB_DEBUG
1285 cirrusfb_dbg_reg_dump(info, NULL);
1286 #endif
1287
1288 return 0;
1289 }
1290
1291 /* for some reason incomprehensible to me, cirrusfb requires that you write
1292 * the registers twice for the settings to take..grr. -dte */
1293 static int cirrusfb_set_par(struct fb_info *info)
1294 {
1295 cirrusfb_set_par_foo(info);
1296 return cirrusfb_set_par_foo(info);
1297 }
1298
1299 static int cirrusfb_setcolreg(unsigned regno, unsigned red, unsigned green,
1300 unsigned blue, unsigned transp,
1301 struct fb_info *info)
1302 {
1303 struct cirrusfb_info *cinfo = info->par;
1304
1305 if (regno > 255)
1306 return -EINVAL;
1307
1308 if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
1309 u32 v;
1310 red >>= (16 - info->var.red.length);
1311 green >>= (16 - info->var.green.length);
1312 blue >>= (16 - info->var.blue.length);
1313
1314 if (regno >= 16)
1315 return 1;
1316 v = (red << info->var.red.offset) |
1317 (green << info->var.green.offset) |
1318 (blue << info->var.blue.offset);
1319
1320 cinfo->pseudo_palette[regno] = v;
1321 return 0;
1322 }
1323
1324 if (info->var.bits_per_pixel == 8)
1325 WClut(cinfo, regno, red >> 10, green >> 10, blue >> 10);
1326
1327 return 0;
1328
1329 }
1330
1331 /*************************************************************************
1332 cirrusfb_pan_display()
1333
1334 performs display panning - provided hardware permits this
1335 **************************************************************************/
1336 static int cirrusfb_pan_display(struct fb_var_screeninfo *var,
1337 struct fb_info *info)
1338 {
1339 int xoffset;
1340 unsigned long base;
1341 unsigned char tmp, xpix;
1342 struct cirrusfb_info *cinfo = info->par;
1343
1344 /* no range checks for xoffset and yoffset, */
1345 /* as fb_pan_display has already done this */
1346 if (var->vmode & FB_VMODE_YWRAP)
1347 return -EINVAL;
1348
1349 xoffset = var->xoffset * info->var.bits_per_pixel / 8;
1350
1351 base = var->yoffset * info->fix.line_length + xoffset;
1352
1353 if (info->var.bits_per_pixel == 1) {
1354 /* base is already correct */
1355 xpix = (unsigned char) (var->xoffset % 8);
1356 } else {
1357 base /= 4;
1358 xpix = (unsigned char) ((xoffset % 4) * 2);
1359 }
1360
1361 if (!is_laguna(cinfo))
1362 cirrusfb_WaitBLT(cinfo->regbase);
1363
1364 /* lower 8 + 8 bits of screen start address */
1365 vga_wcrt(cinfo->regbase, VGA_CRTC_START_LO, base & 0xff);
1366 vga_wcrt(cinfo->regbase, VGA_CRTC_START_HI, (base >> 8) & 0xff);
1367
1368 /* 0xf2 is %11110010, exclude tmp bits */
1369 tmp = vga_rcrt(cinfo->regbase, CL_CRT1B) & 0xf2;
1370 /* construct bits 16, 17 and 18 of screen start address */
1371 if (base & 0x10000)
1372 tmp |= 0x01;
1373 if (base & 0x20000)
1374 tmp |= 0x04;
1375 if (base & 0x40000)
1376 tmp |= 0x08;
1377
1378 vga_wcrt(cinfo->regbase, CL_CRT1B, tmp);
1379
1380 /* construct bit 19 of screen start address */
1381 if (cirrusfb_board_info[cinfo->btype].scrn_start_bit19) {
1382 tmp = vga_rcrt(cinfo->regbase, CL_CRT1D);
1383 if (is_laguna(cinfo))
1384 tmp = (tmp & ~0x18) | ((base >> 16) & 0x18);
1385 else
1386 tmp = (tmp & ~0x80) | ((base >> 12) & 0x80);
1387 vga_wcrt(cinfo->regbase, CL_CRT1D, tmp);
1388 }
1389
1390 /* write pixel panning value to AR33; this does not quite work in 8bpp
1391 *
1392 * ### Piccolo..? Will this work?
1393 */
1394 if (info->var.bits_per_pixel == 1)
1395 vga_wattr(cinfo->regbase, CL_AR33, xpix);
1396
1397 return 0;
1398 }
1399
1400 static int cirrusfb_blank(int blank_mode, struct fb_info *info)
1401 {
1402 /*
1403 * Blank the screen if blank_mode != 0, else unblank. If blank == NULL
1404 * then the caller blanks by setting the CLUT (Color Look Up Table)
1405 * to all black. Return 0 if blanking succeeded, != 0 if un-/blanking
1406 * failed due to e.g. a video mode which doesn't support it.
1407 * Implements VESA suspend and powerdown modes on hardware that
1408 * supports disabling hsync/vsync:
1409 * blank_mode == 2: suspend vsync
1410 * blank_mode == 3: suspend hsync
1411 * blank_mode == 4: powerdown
1412 */
1413 unsigned char val;
1414 struct cirrusfb_info *cinfo = info->par;
1415 int current_mode = cinfo->blank_mode;
1416
1417 dev_dbg(info->device, "ENTER, blank mode = %d\n", blank_mode);
1418
1419 if (info->state != FBINFO_STATE_RUNNING ||
1420 current_mode == blank_mode) {
1421 dev_dbg(info->device, "EXIT, returning 0\n");
1422 return 0;
1423 }
1424
1425 /* Undo current */
1426 if (current_mode == FB_BLANK_NORMAL ||
1427 current_mode == FB_BLANK_UNBLANK)
1428 /* clear "FullBandwidth" bit */
1429 val = 0;
1430 else
1431 /* set "FullBandwidth" bit */
1432 val = 0x20;
1433
1434 val |= vga_rseq(cinfo->regbase, VGA_SEQ_CLOCK_MODE) & 0xdf;
1435 vga_wseq(cinfo->regbase, VGA_SEQ_CLOCK_MODE, val);
1436
1437 switch (blank_mode) {
1438 case FB_BLANK_UNBLANK:
1439 case FB_BLANK_NORMAL:
1440 val = 0x00;
1441 break;
1442 case FB_BLANK_VSYNC_SUSPEND:
1443 val = 0x04;
1444 break;
1445 case FB_BLANK_HSYNC_SUSPEND:
1446 val = 0x02;
1447 break;
1448 case FB_BLANK_POWERDOWN:
1449 val = 0x06;
1450 break;
1451 default:
1452 dev_dbg(info->device, "EXIT, returning 1\n");
1453 return 1;
1454 }
1455
1456 vga_wgfx(cinfo->regbase, CL_GRE, val);
1457
1458 cinfo->blank_mode = blank_mode;
1459 dev_dbg(info->device, "EXIT, returning 0\n");
1460
1461 /* Let fbcon do a soft blank for us */
1462 return (blank_mode == FB_BLANK_NORMAL) ? 1 : 0;
1463 }
1464
1465 /**** END Hardware specific Routines **************************************/
1466 /****************************************************************************/
1467 /**** BEGIN Internal Routines ***********************************************/
1468
1469 static void init_vgachip(struct fb_info *info)
1470 {
1471 struct cirrusfb_info *cinfo = info->par;
1472 const struct cirrusfb_board_info_rec *bi;
1473
1474 assert(cinfo != NULL);
1475
1476 bi = &cirrusfb_board_info[cinfo->btype];
1477
1478 /* reset board globally */
1479 switch (cinfo->btype) {
1480 case BT_PICCOLO:
1481 WSFR(cinfo, 0x01);
1482 udelay(500);
1483 WSFR(cinfo, 0x51);
1484 udelay(500);
1485 break;
1486 case BT_PICASSO:
1487 WSFR2(cinfo, 0xff);
1488 udelay(500);
1489 break;
1490 case BT_SD64:
1491 case BT_SPECTRUM:
1492 WSFR(cinfo, 0x1f);
1493 udelay(500);
1494 WSFR(cinfo, 0x4f);
1495 udelay(500);
1496 break;
1497 case BT_PICASSO4:
1498 /* disable flickerfixer */
1499 vga_wcrt(cinfo->regbase, CL_CRT51, 0x00);
1500 mdelay(100);
1501 /* mode */
1502 vga_wgfx(cinfo->regbase, CL_GR31, 0x00);
1503 case BT_GD5480: /* fall through */
1504 /* from Klaus' NetBSD driver: */
1505 vga_wgfx(cinfo->regbase, CL_GR2F, 0x00);
1506 case BT_ALPINE: /* fall through */
1507 /* put blitter into 542x compat */
1508 vga_wgfx(cinfo->regbase, CL_GR33, 0x00);
1509 break;
1510
1511 case BT_LAGUNA:
1512 case BT_LAGUNAB:
1513 /* Nothing to do to reset the board. */
1514 break;
1515
1516 default:
1517 dev_err(info->device, "Warning: Unknown board type\n");
1518 break;
1519 }
1520
1521 /* make sure RAM size set by this point */
1522 assert(info->screen_size > 0);
1523
1524 /* the P4 is not fully initialized here; I rely on it having been */
1525 /* inited under AmigaOS already, which seems to work just fine */
1526 /* (Klaus advised to do it this way) */
1527
1528 if (cinfo->btype != BT_PICASSO4) {
1529 WGen(cinfo, CL_VSSM, 0x10); /* EGS: 0x16 */
1530 WGen(cinfo, CL_POS102, 0x01);
1531 WGen(cinfo, CL_VSSM, 0x08); /* EGS: 0x0e */
1532
1533 if (cinfo->btype != BT_SD64)
1534 WGen(cinfo, CL_VSSM2, 0x01);
1535
1536 /* reset sequencer logic */
1537 vga_wseq(cinfo->regbase, VGA_SEQ_RESET, 0x03);
1538
1539 /* FullBandwidth (video off) and 8/9 dot clock */
1540 vga_wseq(cinfo->regbase, VGA_SEQ_CLOCK_MODE, 0x21);
1541
1542 /* "magic cookie" - doesn't make any sense to me.. */
1543 /* vga_wgfx(cinfo->regbase, CL_GRA, 0xce); */
1544 /* unlock all extension registers */
1545 vga_wseq(cinfo->regbase, CL_SEQR6, 0x12);
1546
1547 switch (cinfo->btype) {
1548 case BT_GD5480:
1549 vga_wseq(cinfo->regbase, CL_SEQRF, 0x98);
1550 break;
1551 case BT_ALPINE:
1552 case BT_LAGUNA:
1553 case BT_LAGUNAB:
1554 break;
1555 case BT_SD64:
1556 #ifdef CONFIG_ZORRO
1557 vga_wseq(cinfo->regbase, CL_SEQRF, 0xb8);
1558 #endif
1559 break;
1560 default:
1561 vga_wseq(cinfo->regbase, CL_SEQR16, 0x0f);
1562 vga_wseq(cinfo->regbase, CL_SEQRF, 0xb0);
1563 break;
1564 }
1565 }
1566 /* plane mask: nothing */
1567 vga_wseq(cinfo->regbase, VGA_SEQ_PLANE_WRITE, 0xff);
1568 /* character map select: doesn't even matter in gx mode */
1569 vga_wseq(cinfo->regbase, VGA_SEQ_CHARACTER_MAP, 0x00);
1570 /* memory mode: chain4, ext. memory */
1571 vga_wseq(cinfo->regbase, VGA_SEQ_MEMORY_MODE, 0x0a);
1572
1573 /* controller-internal base address of video memory */
1574 if (bi->init_sr07)
1575 vga_wseq(cinfo->regbase, CL_SEQR7, bi->sr07);
1576
1577 /* vga_wseq(cinfo->regbase, CL_SEQR8, 0x00); */
1578 /* EEPROM control: shouldn't be necessary to write to this at all.. */
1579
1580 /* graphics cursor X position (incomplete; position gives rem. 3 bits */
1581 vga_wseq(cinfo->regbase, CL_SEQR10, 0x00);
1582 /* graphics cursor Y position (..."... ) */
1583 vga_wseq(cinfo->regbase, CL_SEQR11, 0x00);
1584 /* graphics cursor attributes */
1585 vga_wseq(cinfo->regbase, CL_SEQR12, 0x00);
1586 /* graphics cursor pattern address */
1587 vga_wseq(cinfo->regbase, CL_SEQR13, 0x00);
1588
1589 /* writing these on a P4 might give problems.. */
1590 if (cinfo->btype != BT_PICASSO4) {
1591 /* configuration readback and ext. color */
1592 vga_wseq(cinfo->regbase, CL_SEQR17, 0x00);
1593 /* signature generator */
1594 vga_wseq(cinfo->regbase, CL_SEQR18, 0x02);
1595 }
1596
1597 /* Screen A preset row scan: none */
1598 vga_wcrt(cinfo->regbase, VGA_CRTC_PRESET_ROW, 0x00);
1599 /* Text cursor start: disable text cursor */
1600 vga_wcrt(cinfo->regbase, VGA_CRTC_CURSOR_START, 0x20);
1601 /* Text cursor end: - */
1602 vga_wcrt(cinfo->regbase, VGA_CRTC_CURSOR_END, 0x00);
1603 /* text cursor location high: 0 */
1604 vga_wcrt(cinfo->regbase, VGA_CRTC_CURSOR_HI, 0x00);
1605 /* text cursor location low: 0 */
1606 vga_wcrt(cinfo->regbase, VGA_CRTC_CURSOR_LO, 0x00);
1607
1608 /* Underline Row scanline: - */
1609 vga_wcrt(cinfo->regbase, VGA_CRTC_UNDERLINE, 0x00);
1610 /* ### add 0x40 for text modes with > 30 MHz pixclock */
1611 /* ext. display controls: ext.adr. wrap */
1612 vga_wcrt(cinfo->regbase, CL_CRT1B, 0x02);
1613
1614 /* Set/Reset registes: - */
1615 vga_wgfx(cinfo->regbase, VGA_GFX_SR_VALUE, 0x00);
1616 /* Set/Reset enable: - */
1617 vga_wgfx(cinfo->regbase, VGA_GFX_SR_ENABLE, 0x00);
1618 /* Color Compare: - */
1619 vga_wgfx(cinfo->regbase, VGA_GFX_COMPARE_VALUE, 0x00);
1620 /* Data Rotate: - */
1621 vga_wgfx(cinfo->regbase, VGA_GFX_DATA_ROTATE, 0x00);
1622 /* Read Map Select: - */
1623 vga_wgfx(cinfo->regbase, VGA_GFX_PLANE_READ, 0x00);
1624 /* Mode: conf. for 16/4/2 color mode, no odd/even, read/write mode 0 */
1625 vga_wgfx(cinfo->regbase, VGA_GFX_MODE, 0x00);
1626 /* Miscellaneous: memory map base address, graphics mode */
1627 vga_wgfx(cinfo->regbase, VGA_GFX_MISC, 0x01);
1628 /* Color Don't care: involve all planes */
1629 vga_wgfx(cinfo->regbase, VGA_GFX_COMPARE_MASK, 0x0f);
1630 /* Bit Mask: no mask at all */
1631 vga_wgfx(cinfo->regbase, VGA_GFX_BIT_MASK, 0xff);
1632
1633 if (cinfo->btype == BT_ALPINE || cinfo->btype == BT_SD64 ||
1634 is_laguna(cinfo))
1635 /* (5434 can't have bit 3 set for bitblt) */
1636 vga_wgfx(cinfo->regbase, CL_GRB, 0x20);
1637 else
1638 /* Graphics controller mode extensions: finer granularity,
1639 * 8byte data latches
1640 */
1641 vga_wgfx(cinfo->regbase, CL_GRB, 0x28);
1642
1643 vga_wgfx(cinfo->regbase, CL_GRC, 0xff); /* Color Key compare: - */
1644 vga_wgfx(cinfo->regbase, CL_GRD, 0x00); /* Color Key compare mask: - */
1645 vga_wgfx(cinfo->regbase, CL_GRE, 0x00); /* Miscellaneous control: - */
1646 /* Background color byte 1: - */
1647 /* vga_wgfx (cinfo->regbase, CL_GR10, 0x00); */
1648 /* vga_wgfx (cinfo->regbase, CL_GR11, 0x00); */
1649
1650 /* Attribute Controller palette registers: "identity mapping" */
1651 vga_wattr(cinfo->regbase, VGA_ATC_PALETTE0, 0x00);
1652 vga_wattr(cinfo->regbase, VGA_ATC_PALETTE1, 0x01);
1653 vga_wattr(cinfo->regbase, VGA_ATC_PALETTE2, 0x02);
1654 vga_wattr(cinfo->regbase, VGA_ATC_PALETTE3, 0x03);
1655 vga_wattr(cinfo->regbase, VGA_ATC_PALETTE4, 0x04);
1656 vga_wattr(cinfo->regbase, VGA_ATC_PALETTE5, 0x05);
1657 vga_wattr(cinfo->regbase, VGA_ATC_PALETTE6, 0x06);
1658 vga_wattr(cinfo->regbase, VGA_ATC_PALETTE7, 0x07);
1659 vga_wattr(cinfo->regbase, VGA_ATC_PALETTE8, 0x08);
1660 vga_wattr(cinfo->regbase, VGA_ATC_PALETTE9, 0x09);
1661 vga_wattr(cinfo->regbase, VGA_ATC_PALETTEA, 0x0a);
1662 vga_wattr(cinfo->regbase, VGA_ATC_PALETTEB, 0x0b);
1663 vga_wattr(cinfo->regbase, VGA_ATC_PALETTEC, 0x0c);
1664 vga_wattr(cinfo->regbase, VGA_ATC_PALETTED, 0x0d);
1665 vga_wattr(cinfo->regbase, VGA_ATC_PALETTEE, 0x0e);
1666 vga_wattr(cinfo->regbase, VGA_ATC_PALETTEF, 0x0f);
1667
1668 /* Attribute Controller mode: graphics mode */
1669 vga_wattr(cinfo->regbase, VGA_ATC_MODE, 0x01);
1670 /* Overscan color reg.: reg. 0 */
1671 vga_wattr(cinfo->regbase, VGA_ATC_OVERSCAN, 0x00);
1672 /* Color Plane enable: Enable all 4 planes */
1673 vga_wattr(cinfo->regbase, VGA_ATC_PLANE_ENABLE, 0x0f);
1674 /* Color Select: - */
1675 vga_wattr(cinfo->regbase, VGA_ATC_COLOR_PAGE, 0x00);
1676
1677 WGen(cinfo, VGA_PEL_MSK, 0xff); /* Pixel mask: no mask */
1678
1679 /* BLT Start/status: Blitter reset */
1680 vga_wgfx(cinfo->regbase, CL_GR31, 0x04);
1681 /* - " - : "end-of-reset" */
1682 vga_wgfx(cinfo->regbase, CL_GR31, 0x00);
1683
1684 /* misc... */
1685 WHDR(cinfo, 0); /* Hidden DAC register: - */
1686 return;
1687 }
1688
1689 static void switch_monitor(struct cirrusfb_info *cinfo, int on)
1690 {
1691 #ifdef CONFIG_ZORRO /* only works on Zorro boards */
1692 static int IsOn = 0; /* XXX not ok for multiple boards */
1693
1694 if (cinfo->btype == BT_PICASSO4)
1695 return; /* nothing to switch */
1696 if (cinfo->btype == BT_ALPINE)
1697 return; /* nothing to switch */
1698 if (cinfo->btype == BT_GD5480)
1699 return; /* nothing to switch */
1700 if (cinfo->btype == BT_PICASSO) {
1701 if ((on && !IsOn) || (!on && IsOn))
1702 WSFR(cinfo, 0xff);
1703 return;
1704 }
1705 if (on) {
1706 switch (cinfo->btype) {
1707 case BT_SD64:
1708 WSFR(cinfo, cinfo->SFR | 0x21);
1709 break;
1710 case BT_PICCOLO:
1711 WSFR(cinfo, cinfo->SFR | 0x28);
1712 break;
1713 case BT_SPECTRUM:
1714 WSFR(cinfo, 0x6f);
1715 break;
1716 default: /* do nothing */ break;
1717 }
1718 } else {
1719 switch (cinfo->btype) {
1720 case BT_SD64:
1721 WSFR(cinfo, cinfo->SFR & 0xde);
1722 break;
1723 case BT_PICCOLO:
1724 WSFR(cinfo, cinfo->SFR & 0xd7);
1725 break;
1726 case BT_SPECTRUM:
1727 WSFR(cinfo, 0x4f);
1728 break;
1729 default: /* do nothing */
1730 break;
1731 }
1732 }
1733 #endif /* CONFIG_ZORRO */
1734 }
1735
1736 /******************************************/
1737 /* Linux 2.6-style accelerated functions */
1738 /******************************************/
1739
1740 static int cirrusfb_sync(struct fb_info *info)
1741 {
1742 struct cirrusfb_info *cinfo = info->par;
1743
1744 if (!is_laguna(cinfo)) {
1745 while (vga_rgfx(cinfo->regbase, CL_GR31) & 0x03)
1746 cpu_relax();
1747 }
1748 return 0;
1749 }
1750
1751 static void cirrusfb_fillrect(struct fb_info *info,
1752 const struct fb_fillrect *region)
1753 {
1754 struct fb_fillrect modded;
1755 int vxres, vyres;
1756 struct cirrusfb_info *cinfo = info->par;
1757 int m = info->var.bits_per_pixel;
1758 u32 color = (info->fix.visual == FB_VISUAL_TRUECOLOR) ?
1759 cinfo->pseudo_palette[region->color] : region->color;
1760
1761 if (info->state != FBINFO_STATE_RUNNING)
1762 return;
1763 if (info->flags & FBINFO_HWACCEL_DISABLED) {
1764 cfb_fillrect(info, region);
1765 return;
1766 }
1767
1768 vxres = info->var.xres_virtual;
1769 vyres = info->var.yres_virtual;
1770
1771 memcpy(&modded, region, sizeof(struct fb_fillrect));
1772
1773 if (!modded.width || !modded.height ||
1774 modded.dx >= vxres || modded.dy >= vyres)
1775 return;
1776
1777 if (modded.dx + modded.width > vxres)
1778 modded.width = vxres - modded.dx;
1779 if (modded.dy + modded.height > vyres)
1780 modded.height = vyres - modded.dy;
1781
1782 cirrusfb_RectFill(cinfo->regbase,
1783 info->var.bits_per_pixel,
1784 (region->dx * m) / 8, region->dy,
1785 (region->width * m) / 8, region->height,
1786 color, color,
1787 info->fix.line_length, 0x40);
1788 }
1789
1790 static void cirrusfb_copyarea(struct fb_info *info,
1791 const struct fb_copyarea *area)
1792 {
1793 struct fb_copyarea modded;
1794 u32 vxres, vyres;
1795 struct cirrusfb_info *cinfo = info->par;
1796 int m = info->var.bits_per_pixel;
1797
1798 if (info->state != FBINFO_STATE_RUNNING)
1799 return;
1800 if (info->flags & FBINFO_HWACCEL_DISABLED) {
1801 cfb_copyarea(info, area);
1802 return;
1803 }
1804
1805 vxres = info->var.xres_virtual;
1806 vyres = info->var.yres_virtual;
1807 memcpy(&modded, area, sizeof(struct fb_copyarea));
1808
1809 if (!modded.width || !modded.height ||
1810 modded.sx >= vxres || modded.sy >= vyres ||
1811 modded.dx >= vxres || modded.dy >= vyres)
1812 return;
1813
1814 if (modded.sx + modded.width > vxres)
1815 modded.width = vxres - modded.sx;
1816 if (modded.dx + modded.width > vxres)
1817 modded.width = vxres - modded.dx;
1818 if (modded.sy + modded.height > vyres)
1819 modded.height = vyres - modded.sy;
1820 if (modded.dy + modded.height > vyres)
1821 modded.height = vyres - modded.dy;
1822
1823 cirrusfb_BitBLT(cinfo->regbase, info->var.bits_per_pixel,
1824 (area->sx * m) / 8, area->sy,
1825 (area->dx * m) / 8, area->dy,
1826 (area->width * m) / 8, area->height,
1827 info->fix.line_length);
1828
1829 }
1830
1831 static void cirrusfb_imageblit(struct fb_info *info,
1832 const struct fb_image *image)
1833 {
1834 struct cirrusfb_info *cinfo = info->par;
1835 unsigned char op = (info->var.bits_per_pixel == 24) ? 0xc : 0x4;
1836
1837 if (info->state != FBINFO_STATE_RUNNING)
1838 return;
1839 /* Alpine/SD64 does not work at 24bpp ??? */
1840 if (info->flags & FBINFO_HWACCEL_DISABLED || image->depth != 1)
1841 cfb_imageblit(info, image);
1842 else if ((cinfo->btype == BT_ALPINE || cinfo->btype == BT_SD64) &&
1843 op == 0xc)
1844 cfb_imageblit(info, image);
1845 else {
1846 unsigned size = ((image->width + 7) >> 3) * image->height;
1847 int m = info->var.bits_per_pixel;
1848 u32 fg, bg;
1849
1850 if (info->var.bits_per_pixel == 8) {
1851 fg = image->fg_color;
1852 bg = image->bg_color;
1853 } else {
1854 fg = ((u32 *)(info->pseudo_palette))[image->fg_color];
1855 bg = ((u32 *)(info->pseudo_palette))[image->bg_color];
1856 }
1857 if (info->var.bits_per_pixel == 24) {
1858 /* clear background first */
1859 cirrusfb_RectFill(cinfo->regbase,
1860 info->var.bits_per_pixel,
1861 (image->dx * m) / 8, image->dy,
1862 (image->width * m) / 8,
1863 image->height,
1864 bg, bg,
1865 info->fix.line_length, 0x40);
1866 }
1867 cirrusfb_RectFill(cinfo->regbase,
1868 info->var.bits_per_pixel,
1869 (image->dx * m) / 8, image->dy,
1870 (image->width * m) / 8, image->height,
1871 fg, bg,
1872 info->fix.line_length, op);
1873 memcpy(info->screen_base, image->data, size);
1874 }
1875 }
1876
1877 #ifdef CONFIG_PPC_PREP
1878 #define PREP_VIDEO_BASE ((volatile unsigned long) 0xC0000000)
1879 #define PREP_IO_BASE ((volatile unsigned char *) 0x80000000)
1880 static void get_prep_addrs(unsigned long *display, unsigned long *registers)
1881 {
1882 *display = PREP_VIDEO_BASE;
1883 *registers = (unsigned long) PREP_IO_BASE;
1884 }
1885
1886 #endif /* CONFIG_PPC_PREP */
1887
1888 #ifdef CONFIG_PCI
1889 static int release_io_ports;
1890
1891 /* Pulled the logic from XFree86 Cirrus driver to get the memory size,
1892 * based on the DRAM bandwidth bit and DRAM bank switching bit. This
1893 * works with 1MB, 2MB and 4MB configurations (which the Motorola boards
1894 * seem to have. */
1895 static unsigned int __devinit cirrusfb_get_memsize(struct fb_info *info,
1896 u8 __iomem *regbase)
1897 {
1898 unsigned long mem;
1899 struct cirrusfb_info *cinfo = info->par;
1900
1901 if (is_laguna(cinfo)) {
1902 unsigned char SR14 = vga_rseq(regbase, CL_SEQR14);
1903
1904 mem = ((SR14 & 7) + 1) << 20;
1905 } else {
1906 unsigned char SRF = vga_rseq(regbase, CL_SEQRF);
1907 switch ((SRF & 0x18)) {
1908 case 0x08:
1909 mem = 512 * 1024;
1910 break;
1911 case 0x10:
1912 mem = 1024 * 1024;
1913 break;
1914 /* 64-bit DRAM data bus width; assume 2MB.
1915 * Also indicates 2MB memory on the 5430.
1916 */
1917 case 0x18:
1918 mem = 2048 * 1024;
1919 break;
1920 default:
1921 dev_warn(info->device, "Unknown memory size!\n");
1922 mem = 1024 * 1024;
1923 }
1924 /* If DRAM bank switching is enabled, there must be
1925 * twice as much memory installed. (4MB on the 5434)
1926 */
1927 if (cinfo->btype != BT_ALPINE && (SRF & 0x80) != 0)
1928 mem *= 2;
1929 }
1930
1931 /* TODO: Handling of GD5446/5480 (see XF86 sources ...) */
1932 return mem;
1933 }
1934
1935 static void get_pci_addrs(const struct pci_dev *pdev,
1936 unsigned long *display, unsigned long *registers)
1937 {
1938 assert(pdev != NULL);
1939 assert(display != NULL);
1940 assert(registers != NULL);
1941
1942 *display = 0;
1943 *registers = 0;
1944
1945 /* This is a best-guess for now */
1946
1947 if (pci_resource_flags(pdev, 0) & IORESOURCE_IO) {
1948 *display = pci_resource_start(pdev, 1);
1949 *registers = pci_resource_start(pdev, 0);
1950 } else {
1951 *display = pci_resource_start(pdev, 0);
1952 *registers = pci_resource_start(pdev, 1);
1953 }
1954
1955 assert(*display != 0);
1956 }
1957
1958 static void cirrusfb_pci_unmap(struct fb_info *info)
1959 {
1960 struct pci_dev *pdev = to_pci_dev(info->device);
1961 struct cirrusfb_info *cinfo = info->par;
1962
1963 if (cinfo->laguna_mmio == NULL)
1964 iounmap(cinfo->laguna_mmio);
1965 iounmap(info->screen_base);
1966 #if 0 /* if system didn't claim this region, we would... */
1967 release_mem_region(0xA0000, 65535);
1968 #endif
1969 if (release_io_ports)
1970 release_region(0x3C0, 32);
1971 pci_release_regions(pdev);
1972 }
1973 #endif /* CONFIG_PCI */
1974
1975 #ifdef CONFIG_ZORRO
1976 static void cirrusfb_zorro_unmap(struct fb_info *info)
1977 {
1978 struct cirrusfb_info *cinfo = info->par;
1979 struct zorro_dev *zdev = to_zorro_dev(info->device);
1980
1981 if (info->fix.smem_start > 16 * MB_)
1982 iounmap(info->screen_base);
1983 if (info->fix.mmio_start > 16 * MB_)
1984 iounmap(cinfo->regbase);
1985
1986 zorro_release_device(zdev);
1987 }
1988 #endif /* CONFIG_ZORRO */
1989
1990 /* function table of the above functions */
1991 static struct fb_ops cirrusfb_ops = {
1992 .owner = THIS_MODULE,
1993 .fb_open = cirrusfb_open,
1994 .fb_release = cirrusfb_release,
1995 .fb_setcolreg = cirrusfb_setcolreg,
1996 .fb_check_var = cirrusfb_check_var,
1997 .fb_set_par = cirrusfb_set_par,
1998 .fb_pan_display = cirrusfb_pan_display,
1999 .fb_blank = cirrusfb_blank,
2000 .fb_fillrect = cirrusfb_fillrect,
2001 .fb_copyarea = cirrusfb_copyarea,
2002 .fb_sync = cirrusfb_sync,
2003 .fb_imageblit = cirrusfb_imageblit,
2004 };
2005
2006 static int __devinit cirrusfb_set_fbinfo(struct fb_info *info)
2007 {
2008 struct cirrusfb_info *cinfo = info->par;
2009 struct fb_var_screeninfo *var = &info->var;
2010
2011 info->pseudo_palette = cinfo->pseudo_palette;
2012 info->flags = FBINFO_DEFAULT
2013 | FBINFO_HWACCEL_XPAN
2014 | FBINFO_HWACCEL_YPAN
2015 | FBINFO_HWACCEL_FILLRECT
2016 | FBINFO_HWACCEL_IMAGEBLIT
2017 | FBINFO_HWACCEL_COPYAREA;
2018 if (noaccel || is_laguna(cinfo)) {
2019 info->flags |= FBINFO_HWACCEL_DISABLED;
2020 info->fix.accel = FB_ACCEL_NONE;
2021 } else
2022 info->fix.accel = FB_ACCEL_CIRRUS_ALPINE;
2023
2024 info->fbops = &cirrusfb_ops;
2025
2026 if (cinfo->btype == BT_GD5480) {
2027 if (var->bits_per_pixel == 16)
2028 info->screen_base += 1 * MB_;
2029 if (var->bits_per_pixel == 32)
2030 info->screen_base += 2 * MB_;
2031 }
2032
2033 /* Fill fix common fields */
2034 strlcpy(info->fix.id, cirrusfb_board_info[cinfo->btype].name,
2035 sizeof(info->fix.id));
2036
2037 /* monochrome: only 1 memory plane */
2038 /* 8 bit and above: Use whole memory area */
2039 info->fix.smem_len = info->screen_size;
2040 if (var->bits_per_pixel == 1)
2041 info->fix.smem_len /= 4;
2042 info->fix.type_aux = 0;
2043 info->fix.xpanstep = 1;
2044 info->fix.ypanstep = 1;
2045 info->fix.ywrapstep = 0;
2046
2047 /* FIXME: map region at 0xB8000 if available, fill in here */
2048 info->fix.mmio_len = 0;
2049
2050 fb_alloc_cmap(&info->cmap, 256, 0);
2051
2052 return 0;
2053 }
2054
2055 static int __devinit cirrusfb_register(struct fb_info *info)
2056 {
2057 struct cirrusfb_info *cinfo = info->par;
2058 int err;
2059
2060 /* sanity checks */
2061 assert(cinfo->btype != BT_NONE);
2062
2063 /* set all the vital stuff */
2064 cirrusfb_set_fbinfo(info);
2065
2066 dev_dbg(info->device, "(RAM start set to: 0x%p)\n", info->screen_base);
2067
2068 err = fb_find_mode(&info->var, info, mode_option, NULL, 0, NULL, 8);
2069 if (!err) {
2070 dev_dbg(info->device, "wrong initial video mode\n");
2071 err = -EINVAL;
2072 goto err_dealloc_cmap;
2073 }
2074
2075 info->var.activate = FB_ACTIVATE_NOW;
2076
2077 err = cirrusfb_check_var(&info->var, info);
2078 if (err < 0) {
2079 /* should never happen */
2080 dev_dbg(info->device,
2081 "choking on default var... umm, no good.\n");
2082 goto err_dealloc_cmap;
2083 }
2084
2085 err = register_framebuffer(info);
2086 if (err < 0) {
2087 dev_err(info->device,
2088 "could not register fb device; err = %d!\n", err);
2089 goto err_dealloc_cmap;
2090 }
2091
2092 return 0;
2093
2094 err_dealloc_cmap:
2095 fb_dealloc_cmap(&info->cmap);
2096 return err;
2097 }
2098
2099 static void __devexit cirrusfb_cleanup(struct fb_info *info)
2100 {
2101 struct cirrusfb_info *cinfo = info->par;
2102
2103 switch_monitor(cinfo, 0);
2104 unregister_framebuffer(info);
2105 fb_dealloc_cmap(&info->cmap);
2106 dev_dbg(info->device, "Framebuffer unregistered\n");
2107 cinfo->unmap(info);
2108 framebuffer_release(info);
2109 }
2110
2111 #ifdef CONFIG_PCI
2112 static int __devinit cirrusfb_pci_register(struct pci_dev *pdev,
2113 const struct pci_device_id *ent)
2114 {
2115 struct cirrusfb_info *cinfo;
2116 struct fb_info *info;
2117 unsigned long board_addr, board_size;
2118 int ret;
2119
2120 ret = pci_enable_device(pdev);
2121 if (ret < 0) {
2122 printk(KERN_ERR "cirrusfb: Cannot enable PCI device\n");
2123 goto err_out;
2124 }
2125
2126 info = framebuffer_alloc(sizeof(struct cirrusfb_info), &pdev->dev);
2127 if (!info) {
2128 printk(KERN_ERR "cirrusfb: could not allocate memory\n");
2129 ret = -ENOMEM;
2130 goto err_out;
2131 }
2132
2133 cinfo = info->par;
2134 cinfo->btype = (enum cirrus_board) ent->driver_data;
2135
2136 dev_dbg(info->device,
2137 " Found PCI device, base address 0 is 0x%Lx, btype set to %d\n",
2138 (unsigned long long)pdev->resource[0].start, cinfo->btype);
2139 dev_dbg(info->device, " base address 1 is 0x%Lx\n",
2140 (unsigned long long)pdev->resource[1].start);
2141
2142 if (isPReP) {
2143 pci_write_config_dword(pdev, PCI_BASE_ADDRESS_0, 0x00000000);
2144 #ifdef CONFIG_PPC_PREP
2145 get_prep_addrs(&board_addr, &info->fix.mmio_start);
2146 #endif
2147 /* PReP dies if we ioremap the IO registers, but it works w/out... */
2148 cinfo->regbase = (char __iomem *) info->fix.mmio_start;
2149 } else {
2150 dev_dbg(info->device,
2151 "Attempt to get PCI info for Cirrus Graphics Card\n");
2152 get_pci_addrs(pdev, &board_addr, &info->fix.mmio_start);
2153 /* FIXME: this forces VGA. alternatives? */
2154 cinfo->regbase = NULL;
2155 cinfo->laguna_mmio = ioremap(info->fix.mmio_start, 0x1000);
2156 }
2157
2158 dev_dbg(info->device, "Board address: 0x%lx, register address: 0x%lx\n",
2159 board_addr, info->fix.mmio_start);
2160
2161 board_size = (cinfo->btype == BT_GD5480) ?
2162 32 * MB_ : cirrusfb_get_memsize(info, cinfo->regbase);
2163
2164 ret = pci_request_regions(pdev, "cirrusfb");
2165 if (ret < 0) {
2166 dev_err(info->device, "cannot reserve region 0x%lx, abort\n",
2167 board_addr);
2168 goto err_release_fb;
2169 }
2170 #if 0 /* if the system didn't claim this region, we would... */
2171 if (!request_mem_region(0xA0000, 65535, "cirrusfb")) {
2172 dev_err(info->device, "cannot reserve region 0x%lx, abort\n",
2173 0xA0000L);
2174 ret = -EBUSY;
2175 goto err_release_regions;
2176 }
2177 #endif
2178 if (request_region(0x3C0, 32, "cirrusfb"))
2179 release_io_ports = 1;
2180
2181 info->screen_base = ioremap(board_addr, board_size);
2182 if (!info->screen_base) {
2183 ret = -EIO;
2184 goto err_release_legacy;
2185 }
2186
2187 info->fix.smem_start = board_addr;
2188 info->screen_size = board_size;
2189 cinfo->unmap = cirrusfb_pci_unmap;
2190
2191 dev_info(info->device,
2192 "Cirrus Logic chipset on PCI bus, RAM (%lu kB) at 0x%lx\n",
2193 info->screen_size >> 10, board_addr);
2194 pci_set_drvdata(pdev, info);
2195
2196 ret = cirrusfb_register(info);
2197 if (!ret)
2198 return 0;
2199
2200 pci_set_drvdata(pdev, NULL);
2201 iounmap(info->screen_base);
2202 err_release_legacy:
2203 if (release_io_ports)
2204 release_region(0x3C0, 32);
2205 #if 0
2206 release_mem_region(0xA0000, 65535);
2207 err_release_regions:
2208 #endif
2209 pci_release_regions(pdev);
2210 err_release_fb:
2211 if (cinfo->laguna_mmio != NULL)
2212 iounmap(cinfo->laguna_mmio);
2213 framebuffer_release(info);
2214 err_out:
2215 return ret;
2216 }
2217
2218 static void __devexit cirrusfb_pci_unregister(struct pci_dev *pdev)
2219 {
2220 struct fb_info *info = pci_get_drvdata(pdev);
2221
2222 cirrusfb_cleanup(info);
2223 }
2224
2225 static struct pci_driver cirrusfb_pci_driver = {
2226 .name = "cirrusfb",
2227 .id_table = cirrusfb_pci_table,
2228 .probe = cirrusfb_pci_register,
2229 .remove = __devexit_p(cirrusfb_pci_unregister),
2230 #ifdef CONFIG_PM
2231 #if 0
2232 .suspend = cirrusfb_pci_suspend,
2233 .resume = cirrusfb_pci_resume,
2234 #endif
2235 #endif
2236 };
2237 #endif /* CONFIG_PCI */
2238
2239 #ifdef CONFIG_ZORRO
2240 static int __devinit cirrusfb_zorro_register(struct zorro_dev *z,
2241 const struct zorro_device_id *ent)
2242 {
2243 struct fb_info *info;
2244 int error;
2245 const struct zorrocl *zcl;
2246 enum cirrus_board btype;
2247 unsigned long regbase, ramsize, rambase;
2248 struct cirrusfb_info *cinfo;
2249
2250 info = framebuffer_alloc(sizeof(struct cirrusfb_info), &z->dev);
2251 if (!info) {
2252 printk(KERN_ERR "cirrusfb: could not allocate memory\n");
2253 return -ENOMEM;
2254 }
2255
2256 zcl = (const struct zorrocl *)ent->driver_data;
2257 btype = zcl->type;
2258 regbase = zorro_resource_start(z) + zcl->regoffset;
2259 ramsize = zcl->ramsize;
2260 if (ramsize) {
2261 rambase = zorro_resource_start(z) + zcl->ramoffset;
2262 if (zorro_resource_len(z) == 64 * MB_) {
2263 /* Quirk for 64 MiB Picasso IV */
2264 rambase += zcl->ramoffset;
2265 }
2266 } else {
2267 struct zorro_dev *ram = zorro_find_device(zcl->ramid, NULL);
2268 if (!ram || !zorro_resource_len(ram)) {
2269 dev_err(info->device, "No video RAM found\n");
2270 error = -ENODEV;
2271 goto err_release_fb;
2272 }
2273 rambase = zorro_resource_start(ram);
2274 ramsize = zorro_resource_len(ram);
2275 if (zcl->ramid2 &&
2276 (ram = zorro_find_device(zcl->ramid2, NULL))) {
2277 if (zorro_resource_start(ram) != rambase + ramsize) {
2278 dev_warn(info->device,
2279 "Skipping non-contiguous RAM at %pR\n",
2280 &ram->resource);
2281 } else {
2282 ramsize += zorro_resource_len(ram);
2283 }
2284 }
2285 }
2286
2287 dev_info(info->device,
2288 "%s board detected, REG at 0x%lx, %lu MiB RAM at 0x%lx\n",
2289 cirrusfb_board_info[btype].name, regbase, ramsize / MB_,
2290 rambase);
2291
2292 if (!zorro_request_device(z, "cirrusfb")) {
2293 dev_err(info->device, "Cannot reserve %pR\n", &z->resource);
2294 error = -EBUSY;
2295 goto err_release_fb;
2296 }
2297
2298 cinfo = info->par;
2299 cinfo->btype = btype;
2300
2301 info->fix.mmio_start = regbase;
2302 cinfo->regbase = regbase > 16 * MB_ ? ioremap(regbase, 64 * 1024)
2303 : (caddr_t)ZTWO_VADDR(regbase);
2304 if (!cinfo->regbase) {
2305 dev_err(info->device, "Cannot map registers\n");
2306 error = -EIO;
2307 goto err_release_dev;
2308 }
2309
2310 info->fix.smem_start = rambase;
2311 info->screen_size = ramsize;
2312 info->screen_base = rambase > 16 * MB_ ? ioremap(rambase, ramsize)
2313 : (caddr_t)ZTWO_VADDR(rambase);
2314 if (!info->screen_base) {
2315 dev_err(info->device, "Cannot map video RAM\n");
2316 error = -EIO;
2317 goto err_unmap_reg;
2318 }
2319
2320 cinfo->unmap = cirrusfb_zorro_unmap;
2321
2322 dev_info(info->device,
2323 "Cirrus Logic chipset on Zorro bus, RAM (%lu MiB) at 0x%lx\n",
2324 ramsize / MB_, rambase);
2325
2326 /* MCLK select etc. */
2327 if (cirrusfb_board_info[btype].init_sr1f)
2328 vga_wseq(cinfo->regbase, CL_SEQR1F,
2329 cirrusfb_board_info[btype].sr1f);
2330
2331 error = cirrusfb_register(info);
2332 if (error) {
2333 dev_err(info->device, "Failed to register device, error %d\n",
2334 error);
2335 goto err_unmap_ram;
2336 }
2337
2338 zorro_set_drvdata(z, info);
2339 return 0;
2340
2341 err_unmap_ram:
2342 if (rambase > 16 * MB_)
2343 iounmap(info->screen_base);
2344
2345 err_unmap_reg:
2346 if (regbase > 16 * MB_)
2347 iounmap(cinfo->regbase);
2348 err_release_dev:
2349 zorro_release_device(z);
2350 err_release_fb:
2351 framebuffer_release(info);
2352 return error;
2353 }
2354
2355 void __devexit cirrusfb_zorro_unregister(struct zorro_dev *z)
2356 {
2357 struct fb_info *info = zorro_get_drvdata(z);
2358
2359 cirrusfb_cleanup(info);
2360 zorro_set_drvdata(z, NULL);
2361 }
2362
2363 static struct zorro_driver cirrusfb_zorro_driver = {
2364 .name = "cirrusfb",
2365 .id_table = cirrusfb_zorro_table,
2366 .probe = cirrusfb_zorro_register,
2367 .remove = __devexit_p(cirrusfb_zorro_unregister),
2368 };
2369 #endif /* CONFIG_ZORRO */
2370
2371 #ifndef MODULE
2372 static int __init cirrusfb_setup(char *options)
2373 {
2374 char *this_opt;
2375
2376 if (!options || !*options)
2377 return 0;
2378
2379 while ((this_opt = strsep(&options, ",")) != NULL) {
2380 if (!*this_opt)
2381 continue;
2382
2383 if (!strcmp(this_opt, "noaccel"))
2384 noaccel = 1;
2385 else if (!strncmp(this_opt, "mode:", 5))
2386 mode_option = this_opt + 5;
2387 else
2388 mode_option = this_opt;
2389 }
2390 return 0;
2391 }
2392 #endif
2393
2394 /*
2395 * Modularization
2396 */
2397
2398 MODULE_AUTHOR("Copyright 1999,2000 Jeff Garzik <jgarzik@pobox.com>");
2399 MODULE_DESCRIPTION("Accelerated FBDev driver for Cirrus Logic chips");
2400 MODULE_LICENSE("GPL");
2401
2402 static int __init cirrusfb_init(void)
2403 {
2404 int error = 0;
2405
2406 #ifndef MODULE
2407 char *option = NULL;
2408
2409 if (fb_get_options("cirrusfb", &option))
2410 return -ENODEV;
2411 cirrusfb_setup(option);
2412 #endif
2413
2414 #ifdef CONFIG_ZORRO
2415 error |= zorro_register_driver(&cirrusfb_zorro_driver);
2416 #endif
2417 #ifdef CONFIG_PCI
2418 error |= pci_register_driver(&cirrusfb_pci_driver);
2419 #endif
2420 return error;
2421 }
2422
2423 static void __exit cirrusfb_exit(void)
2424 {
2425 #ifdef CONFIG_PCI
2426 pci_unregister_driver(&cirrusfb_pci_driver);
2427 #endif
2428 #ifdef CONFIG_ZORRO
2429 zorro_unregister_driver(&cirrusfb_zorro_driver);
2430 #endif
2431 }
2432
2433 module_init(cirrusfb_init);
2434
2435 module_param(mode_option, charp, 0);
2436 MODULE_PARM_DESC(mode_option, "Initial video mode e.g. '648x480-8@60'");
2437 module_param(noaccel, bool, 0);
2438 MODULE_PARM_DESC(noaccel, "Disable acceleration");
2439
2440 #ifdef MODULE
2441 module_exit(cirrusfb_exit);
2442 #endif
2443
2444 /**********************************************************************/
2445 /* about the following functions - I have used the same names for the */
2446 /* functions as Markus Wild did in his Retina driver for NetBSD as */
2447 /* they just made sense for this purpose. Apart from that, I wrote */
2448 /* these functions myself. */
2449 /**********************************************************************/
2450
2451 /*** WGen() - write into one of the external/general registers ***/
2452 static void WGen(const struct cirrusfb_info *cinfo,
2453 int regnum, unsigned char val)
2454 {
2455 unsigned long regofs = 0;
2456
2457 if (cinfo->btype == BT_PICASSO) {
2458 /* Picasso II specific hack */
2459 /* if (regnum == VGA_PEL_IR || regnum == VGA_PEL_D ||
2460 regnum == CL_VSSM2) */
2461 if (regnum == VGA_PEL_IR || regnum == VGA_PEL_D)
2462 regofs = 0xfff;
2463 }
2464
2465 vga_w(cinfo->regbase, regofs + regnum, val);
2466 }
2467
2468 /*** RGen() - read out one of the external/general registers ***/
2469 static unsigned char RGen(const struct cirrusfb_info *cinfo, int regnum)
2470 {
2471 unsigned long regofs = 0;
2472
2473 if (cinfo->btype == BT_PICASSO) {
2474 /* Picasso II specific hack */
2475 /* if (regnum == VGA_PEL_IR || regnum == VGA_PEL_D ||
2476 regnum == CL_VSSM2) */
2477 if (regnum == VGA_PEL_IR || regnum == VGA_PEL_D)
2478 regofs = 0xfff;
2479 }
2480
2481 return vga_r(cinfo->regbase, regofs + regnum);
2482 }
2483
2484 /*** AttrOn() - turn on VideoEnable for Attribute controller ***/
2485 static void AttrOn(const struct cirrusfb_info *cinfo)
2486 {
2487 assert(cinfo != NULL);
2488
2489 if (vga_rcrt(cinfo->regbase, CL_CRT24) & 0x80) {
2490 /* if we're just in "write value" mode, write back the */
2491 /* same value as before to not modify anything */
2492 vga_w(cinfo->regbase, VGA_ATT_IW,
2493 vga_r(cinfo->regbase, VGA_ATT_R));
2494 }
2495 /* turn on video bit */
2496 /* vga_w(cinfo->regbase, VGA_ATT_IW, 0x20); */
2497 vga_w(cinfo->regbase, VGA_ATT_IW, 0x33);
2498
2499 /* dummy write on Reg0 to be on "write index" mode next time */
2500 vga_w(cinfo->regbase, VGA_ATT_IW, 0x00);
2501 }
2502
2503 /*** WHDR() - write into the Hidden DAC register ***/
2504 /* as the HDR is the only extension register that requires special treatment
2505 * (the other extension registers are accessible just like the "ordinary"
2506 * registers of their functional group) here is a specialized routine for
2507 * accessing the HDR
2508 */
2509 static void WHDR(const struct cirrusfb_info *cinfo, unsigned char val)
2510 {
2511 unsigned char dummy;
2512
2513 if (is_laguna(cinfo))
2514 return;
2515 if (cinfo->btype == BT_PICASSO) {
2516 /* Klaus' hint for correct access to HDR on some boards */
2517 /* first write 0 to pixel mask (3c6) */
2518 WGen(cinfo, VGA_PEL_MSK, 0x00);
2519 udelay(200);
2520 /* next read dummy from pixel address (3c8) */
2521 dummy = RGen(cinfo, VGA_PEL_IW);
2522 udelay(200);
2523 }
2524 /* now do the usual stuff to access the HDR */
2525
2526 dummy = RGen(cinfo, VGA_PEL_MSK);
2527 udelay(200);
2528 dummy = RGen(cinfo, VGA_PEL_MSK);
2529 udelay(200);
2530 dummy = RGen(cinfo, VGA_PEL_MSK);
2531 udelay(200);
2532 dummy = RGen(cinfo, VGA_PEL_MSK);
2533 udelay(200);
2534
2535 WGen(cinfo, VGA_PEL_MSK, val);
2536 udelay(200);
2537
2538 if (cinfo->btype == BT_PICASSO) {
2539 /* now first reset HDR access counter */
2540 dummy = RGen(cinfo, VGA_PEL_IW);
2541 udelay(200);
2542
2543 /* and at the end, restore the mask value */
2544 /* ## is this mask always 0xff? */
2545 WGen(cinfo, VGA_PEL_MSK, 0xff);
2546 udelay(200);
2547 }
2548 }
2549
2550 /*** WSFR() - write to the "special function register" (SFR) ***/
2551 static void WSFR(struct cirrusfb_info *cinfo, unsigned char val)
2552 {
2553 #ifdef CONFIG_ZORRO
2554 assert(cinfo->regbase != NULL);
2555 cinfo->SFR = val;
2556 z_writeb(val, cinfo->regbase + 0x8000);
2557 #endif
2558 }
2559
2560 /* The Picasso has a second register for switching the monitor bit */
2561 static void WSFR2(struct cirrusfb_info *cinfo, unsigned char val)
2562 {
2563 #ifdef CONFIG_ZORRO
2564 /* writing an arbitrary value to this one causes the monitor switcher */
2565 /* to flip to Amiga display */
2566 assert(cinfo->regbase != NULL);
2567 cinfo->SFR = val;
2568 z_writeb(val, cinfo->regbase + 0x9000);
2569 #endif
2570 }
2571
2572 /*** WClut - set CLUT entry (range: 0..63) ***/
2573 static void WClut(struct cirrusfb_info *cinfo, unsigned char regnum, unsigned char red,
2574 unsigned char green, unsigned char blue)
2575 {
2576 unsigned int data = VGA_PEL_D;
2577
2578 /* address write mode register is not translated.. */
2579 vga_w(cinfo->regbase, VGA_PEL_IW, regnum);
2580
2581 if (cinfo->btype == BT_PICASSO || cinfo->btype == BT_PICASSO4 ||
2582 cinfo->btype == BT_ALPINE || cinfo->btype == BT_GD5480 ||
2583 cinfo->btype == BT_SD64 || is_laguna(cinfo)) {
2584 /* but DAC data register IS, at least for Picasso II */
2585 if (cinfo->btype == BT_PICASSO)
2586 data += 0xfff;
2587 vga_w(cinfo->regbase, data, red);
2588 vga_w(cinfo->regbase, data, green);
2589 vga_w(cinfo->regbase, data, blue);
2590 } else {
2591 vga_w(cinfo->regbase, data, blue);
2592 vga_w(cinfo->regbase, data, green);
2593 vga_w(cinfo->regbase, data, red);
2594 }
2595 }
2596
2597 #if 0
2598 /*** RClut - read CLUT entry (range 0..63) ***/
2599 static void RClut(struct cirrusfb_info *cinfo, unsigned char regnum, unsigned char *red,
2600 unsigned char *green, unsigned char *blue)
2601 {
2602 unsigned int data = VGA_PEL_D;
2603
2604 vga_w(cinfo->regbase, VGA_PEL_IR, regnum);
2605
2606 if (cinfo->btype == BT_PICASSO || cinfo->btype == BT_PICASSO4 ||
2607 cinfo->btype == BT_ALPINE || cinfo->btype == BT_GD5480) {
2608 if (cinfo->btype == BT_PICASSO)
2609 data += 0xfff;
2610 *red = vga_r(cinfo->regbase, data);
2611 *green = vga_r(cinfo->regbase, data);
2612 *blue = vga_r(cinfo->regbase, data);
2613 } else {
2614 *blue = vga_r(cinfo->regbase, data);
2615 *green = vga_r(cinfo->regbase, data);
2616 *red = vga_r(cinfo->regbase, data);
2617 }
2618 }
2619 #endif
2620
2621 /*******************************************************************
2622 cirrusfb_WaitBLT()
2623
2624 Wait for the BitBLT engine to complete a possible earlier job
2625 *********************************************************************/
2626
2627 /* FIXME: use interrupts instead */
2628 static void cirrusfb_WaitBLT(u8 __iomem *regbase)
2629 {
2630 while (vga_rgfx(regbase, CL_GR31) & 0x08)
2631 cpu_relax();
2632 }
2633
2634 /*******************************************************************
2635 cirrusfb_BitBLT()
2636
2637 perform accelerated "scrolling"
2638 ********************************************************************/
2639
2640 static void cirrusfb_set_blitter(u8 __iomem *regbase,
2641 u_short nwidth, u_short nheight,
2642 u_long nsrc, u_long ndest,
2643 u_short bltmode, u_short line_length)
2644
2645 {
2646 /* pitch: set to line_length */
2647 /* dest pitch low */
2648 vga_wgfx(regbase, CL_GR24, line_length & 0xff);
2649 /* dest pitch hi */
2650 vga_wgfx(regbase, CL_GR25, line_length >> 8);
2651 /* source pitch low */
2652 vga_wgfx(regbase, CL_GR26, line_length & 0xff);
2653 /* source pitch hi */
2654 vga_wgfx(regbase, CL_GR27, line_length >> 8);
2655
2656 /* BLT width: actual number of pixels - 1 */
2657 /* BLT width low */
2658 vga_wgfx(regbase, CL_GR20, nwidth & 0xff);
2659 /* BLT width hi */
2660 vga_wgfx(regbase, CL_GR21, nwidth >> 8);
2661
2662 /* BLT height: actual number of lines -1 */
2663 /* BLT height low */
2664 vga_wgfx(regbase, CL_GR22, nheight & 0xff);
2665 /* BLT width hi */
2666 vga_wgfx(regbase, CL_GR23, nheight >> 8);
2667
2668 /* BLT destination */
2669 /* BLT dest low */
2670 vga_wgfx(regbase, CL_GR28, (u_char) (ndest & 0xff));
2671 /* BLT dest mid */
2672 vga_wgfx(regbase, CL_GR29, (u_char) (ndest >> 8));
2673 /* BLT dest hi */
2674 vga_wgfx(regbase, CL_GR2A, (u_char) (ndest >> 16));
2675
2676 /* BLT source */
2677 /* BLT src low */
2678 vga_wgfx(regbase, CL_GR2C, (u_char) (nsrc & 0xff));
2679 /* BLT src mid */
2680 vga_wgfx(regbase, CL_GR2D, (u_char) (nsrc >> 8));
2681 /* BLT src hi */
2682 vga_wgfx(regbase, CL_GR2E, (u_char) (nsrc >> 16));
2683
2684 /* BLT mode */
2685 vga_wgfx(regbase, CL_GR30, bltmode); /* BLT mode */
2686
2687 /* BLT ROP: SrcCopy */
2688 vga_wgfx(regbase, CL_GR32, 0x0d); /* BLT ROP */
2689
2690 /* and finally: GO! */
2691 vga_wgfx(regbase, CL_GR31, 0x02); /* BLT Start/status */
2692 }
2693
2694 /*******************************************************************
2695 cirrusfb_BitBLT()
2696
2697 perform accelerated "scrolling"
2698 ********************************************************************/
2699
2700 static void cirrusfb_BitBLT(u8 __iomem *regbase, int bits_per_pixel,
2701 u_short curx, u_short cury,
2702 u_short destx, u_short desty,
2703 u_short width, u_short height,
2704 u_short line_length)
2705 {
2706 u_short nwidth = width - 1;
2707 u_short nheight = height - 1;
2708 u_long nsrc, ndest;
2709 u_char bltmode;
2710
2711 bltmode = 0x00;
2712 /* if source adr < dest addr, do the Blt backwards */
2713 if (cury <= desty) {
2714 if (cury == desty) {
2715 /* if src and dest are on the same line, check x */
2716 if (curx < destx)
2717 bltmode |= 0x01;
2718 } else
2719 bltmode |= 0x01;
2720 }
2721 /* standard case: forward blitting */
2722 nsrc = (cury * line_length) + curx;
2723 ndest = (desty * line_length) + destx;
2724 if (bltmode) {
2725 /* this means start addresses are at the end,
2726 * counting backwards
2727 */
2728 nsrc += nheight * line_length + nwidth;
2729 ndest += nheight * line_length + nwidth;
2730 }
2731
2732 cirrusfb_WaitBLT(regbase);
2733
2734 cirrusfb_set_blitter(regbase, nwidth, nheight,
2735 nsrc, ndest, bltmode, line_length);
2736 }
2737
2738 /*******************************************************************
2739 cirrusfb_RectFill()
2740
2741 perform accelerated rectangle fill
2742 ********************************************************************/
2743
2744 static void cirrusfb_RectFill(u8 __iomem *regbase, int bits_per_pixel,
2745 u_short x, u_short y, u_short width, u_short height,
2746 u32 fg_color, u32 bg_color, u_short line_length,
2747 u_char blitmode)
2748 {
2749 u_long ndest = (y * line_length) + x;
2750 u_char op;
2751
2752 cirrusfb_WaitBLT(regbase);
2753
2754 /* This is a ColorExpand Blt, using the */
2755 /* same color for foreground and background */
2756 vga_wgfx(regbase, VGA_GFX_SR_VALUE, bg_color);
2757 vga_wgfx(regbase, VGA_GFX_SR_ENABLE, fg_color);
2758
2759 op = 0x80;
2760 if (bits_per_pixel >= 16) {
2761 vga_wgfx(regbase, CL_GR10, bg_color >> 8);
2762 vga_wgfx(regbase, CL_GR11, fg_color >> 8);
2763 op = 0x90;
2764 }
2765 if (bits_per_pixel >= 24) {
2766 vga_wgfx(regbase, CL_GR12, bg_color >> 16);
2767 vga_wgfx(regbase, CL_GR13, fg_color >> 16);
2768 op = 0xa0;
2769 }
2770 if (bits_per_pixel == 32) {
2771 vga_wgfx(regbase, CL_GR14, bg_color >> 24);
2772 vga_wgfx(regbase, CL_GR15, fg_color >> 24);
2773 op = 0xb0;
2774 }
2775 cirrusfb_set_blitter(regbase, width - 1, height - 1,
2776 0, ndest, op | blitmode, line_length);
2777 }
2778
2779 /**************************************************************************
2780 * bestclock() - determine closest possible clock lower(?) than the
2781 * desired pixel clock
2782 **************************************************************************/
2783 static void bestclock(long freq, int *nom, int *den, int *div)
2784 {
2785 int n, d;
2786 long h, diff;
2787
2788 assert(nom != NULL);
2789 assert(den != NULL);
2790 assert(div != NULL);
2791
2792 *nom = 0;
2793 *den = 0;
2794 *div = 0;
2795
2796 if (freq < 8000)
2797 freq = 8000;
2798
2799 diff = freq;
2800
2801 for (n = 32; n < 128; n++) {
2802 int s = 0;
2803
2804 d = (14318 * n) / freq;
2805 if ((d >= 7) && (d <= 63)) {
2806 int temp = d;
2807
2808 if (temp > 31) {
2809 s = 1;
2810 temp >>= 1;
2811 }
2812 h = ((14318 * n) / temp) >> s;
2813 h = h > freq ? h - freq : freq - h;
2814 if (h < diff) {
2815 diff = h;
2816 *nom = n;
2817 *den = temp;
2818 *div = s;
2819 }
2820 }
2821 d++;
2822 if ((d >= 7) && (d <= 63)) {
2823 if (d > 31) {
2824 s = 1;
2825 d >>= 1;
2826 }
2827 h = ((14318 * n) / d) >> s;
2828 h = h > freq ? h - freq : freq - h;
2829 if (h < diff) {
2830 diff = h;
2831 *nom = n;
2832 *den = d;
2833 *div = s;
2834 }
2835 }
2836 }
2837 }
2838
2839 /* -------------------------------------------------------------------------
2840 *
2841 * debugging functions
2842 *
2843 * -------------------------------------------------------------------------
2844 */
2845
2846 #ifdef CIRRUSFB_DEBUG
2847
2848 /**
2849 * cirrusfb_dbg_print_regs
2850 * @base: If using newmmio, the newmmio base address, otherwise %NULL
2851 * @reg_class: type of registers to read: %CRT, or %SEQ
2852 *
2853 * DESCRIPTION:
2854 * Dumps the given list of VGA CRTC registers. If @base is %NULL,
2855 * old-style I/O ports are queried for information, otherwise MMIO is
2856 * used at the given @base address to query the information.
2857 */
2858
2859 static void cirrusfb_dbg_print_regs(struct fb_info *info,
2860 caddr_t regbase,
2861 enum cirrusfb_dbg_reg_class reg_class, ...)
2862 {
2863 va_list list;
2864 unsigned char val = 0;
2865 unsigned reg;
2866 char *name;
2867
2868 va_start(list, reg_class);
2869
2870 name = va_arg(list, char *);
2871 while (name != NULL) {
2872 reg = va_arg(list, int);
2873
2874 switch (reg_class) {
2875 case CRT:
2876 val = vga_rcrt(regbase, (unsigned char) reg);
2877 break;
2878 case SEQ:
2879 val = vga_rseq(regbase, (unsigned char) reg);
2880 break;
2881 default:
2882 /* should never occur */
2883 assert(false);
2884 break;
2885 }
2886
2887 dev_dbg(info->device, "%8s = 0x%02X\n", name, val);
2888
2889 name = va_arg(list, char *);
2890 }
2891
2892 va_end(list);
2893 }
2894
2895 /**
2896 * cirrusfb_dbg_reg_dump
2897 * @base: If using newmmio, the newmmio base address, otherwise %NULL
2898 *
2899 * DESCRIPTION:
2900 * Dumps a list of interesting VGA and CIRRUSFB registers. If @base is %NULL,
2901 * old-style I/O ports are queried for information, otherwise MMIO is
2902 * used at the given @base address to query the information.
2903 */
2904
2905 static void cirrusfb_dbg_reg_dump(struct fb_info *info, caddr_t regbase)
2906 {
2907 dev_dbg(info->device, "VGA CRTC register dump:\n");
2908
2909 cirrusfb_dbg_print_regs(info, regbase, CRT,
2910 "CR00", 0x00,
2911 "CR01", 0x01,
2912 "CR02", 0x02,
2913 "CR03", 0x03,
2914 "CR04", 0x04,
2915 "CR05", 0x05,
2916 "CR06", 0x06,
2917 "CR07", 0x07,
2918 "CR08", 0x08,
2919 "CR09", 0x09,
2920 "CR0A", 0x0A,
2921 "CR0B", 0x0B,
2922 "CR0C", 0x0C,
2923 "CR0D", 0x0D,
2924 "CR0E", 0x0E,
2925 "CR0F", 0x0F,
2926 "CR10", 0x10,
2927 "CR11", 0x11,
2928 "CR12", 0x12,
2929 "CR13", 0x13,
2930 "CR14", 0x14,
2931 "CR15", 0x15,
2932 "CR16", 0x16,
2933 "CR17", 0x17,
2934 "CR18", 0x18,
2935 "CR22", 0x22,
2936 "CR24", 0x24,
2937 "CR26", 0x26,
2938 "CR2D", 0x2D,
2939 "CR2E", 0x2E,
2940 "CR2F", 0x2F,
2941 "CR30", 0x30,
2942 "CR31", 0x31,
2943 "CR32", 0x32,
2944 "CR33", 0x33,
2945 "CR34", 0x34,
2946 "CR35", 0x35,
2947 "CR36", 0x36,
2948 "CR37", 0x37,
2949 "CR38", 0x38,
2950 "CR39", 0x39,
2951 "CR3A", 0x3A,
2952 "CR3B", 0x3B,
2953 "CR3C", 0x3C,
2954 "CR3D", 0x3D,
2955 "CR3E", 0x3E,
2956 "CR3F", 0x3F,
2957 NULL);
2958
2959 dev_dbg(info->device, "\n");
2960
2961 dev_dbg(info->device, "VGA SEQ register dump:\n");
2962
2963 cirrusfb_dbg_print_regs(info, regbase, SEQ,
2964 "SR00", 0x00,
2965 "SR01", 0x01,
2966 "SR02", 0x02,
2967 "SR03", 0x03,
2968 "SR04", 0x04,
2969 "SR08", 0x08,
2970 "SR09", 0x09,
2971 "SR0A", 0x0A,
2972 "SR0B", 0x0B,
2973 "SR0D", 0x0D,
2974 "SR10", 0x10,
2975 "SR11", 0x11,
2976 "SR12", 0x12,
2977 "SR13", 0x13,
2978 "SR14", 0x14,
2979 "SR15", 0x15,
2980 "SR16", 0x16,
2981 "SR17", 0x17,
2982 "SR18", 0x18,
2983 "SR19", 0x19,
2984 "SR1A", 0x1A,
2985 "SR1B", 0x1B,
2986 "SR1C", 0x1C,
2987 "SR1D", 0x1D,
2988 "SR1E", 0x1E,
2989 "SR1F", 0x1F,
2990 NULL);
2991
2992 dev_dbg(info->device, "\n");
2993 }
2994
2995 #endif /* CIRRUSFB_DEBUG */
2996