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