2 * drivers/video/cirrusfb.c - driver for Cirrus Logic chipsets
4 * Copyright 1999-2001 Jeff Garzik <jgarzik@pobox.com>
6 * Contributors (thanks, all!)
9 * Overhaul for Linux 2.6
12 * Major contributions; Motorola PowerStack (PPC and PCI) support,
13 * GD54xx, 1280x1024 mode support, change MCLK based on VCLK.
16 * Excellent code review.
19 * Amiga updates and testing.
21 * Original cirrusfb author: Frank Neumann
23 * Based on retz3fb.c and cirrusfb.c:
24 * Copyright (C) 1997 Jes Sorensen
25 * Copyright (C) 1996 Frank Neumann
27 ***************************************************************
29 * Format this code with GNU indent '-kr -i8 -pcs' options.
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
37 #include <linux/module.h>
38 #include <linux/kernel.h>
39 #include <linux/errno.h>
40 #include <linux/string.h>
42 #include <linux/slab.h>
43 #include <linux/delay.h>
45 #include <linux/init.h>
46 #include <asm/pgtable.h>
49 #include <linux/zorro.h>
52 #include <linux/pci.h>
55 #include <asm/amigahw.h>
57 #ifdef CONFIG_PPC_PREP
58 #include <asm/machdep.h>
59 #define isPReP machine_is(prep)
64 #include <video/vga.h>
65 #include <video/cirrus.h>
67 /*****************************************************************
69 * debugging and utility macros
73 /* disable runtime assertions? */
74 /* #define CIRRUSFB_NDEBUG */
76 /* debugging assertions */
77 #ifndef CIRRUSFB_NDEBUG
78 #define assert(expr) \
80 printk("Assertion failed! %s,%s,%s,line=%d\n", \
81 #expr, __FILE__, __func__, __LINE__); \
87 #define MB_ (1024 * 1024)
89 /*****************************************************************
102 BT_PICASSO4, /* GD5446 */
103 BT_ALPINE, /* GD543x/4x */
105 BT_LAGUNA, /* GD546x */
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
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;
126 /* initial SR07 value, then for each mode */
128 unsigned char sr07_1bpp;
129 unsigned char sr07_1bpp_mux;
130 unsigned char sr07_8bpp;
131 unsigned char sr07_8bpp_mux;
133 unsigned char sr1f; /* SR1F VGA initial register value */
134 } cirrusfb_board_info[] = {
139 /* the SD64/P4 have a higher max. videoclock */
140 135100, 135100, 85500, 85500, 0
144 .scrn_start_bit19 = true,
151 .name = "CL Piccolo",
154 90000, 90000, 90000, 90000, 90000
158 .scrn_start_bit19 = false,
165 .name = "CL Picasso",
168 90000, 90000, 90000, 90000, 90000
172 .scrn_start_bit19 = false,
179 .name = "CL Spectrum",
182 90000, 90000, 90000, 90000, 90000
186 .scrn_start_bit19 = false,
193 .name = "CL Picasso4",
195 135100, 135100, 85500, 85500, 0
199 .scrn_start_bit19 = true,
208 /* for the GD5430. GD5446 can do more... */
209 85500, 85500, 50000, 28500, 0
213 .scrn_start_bit19 = true,
216 .sr07_1bpp_mux = 0xA7,
218 .sr07_8bpp_mux = 0xA7,
224 135100, 200000, 200000, 135100, 135100
228 .scrn_start_bit19 = true,
238 135100, 135100, 135100, 135100, 135100,
242 .scrn_start_bit19 = true,
247 #define CHIP(id, btype) \
248 { PCI_VENDOR_ID_CIRRUS, id, PCI_ANY_ID, PCI_ANY_ID, 0, 0, (btype) }
250 static struct pci_device_id cirrusfb_pci_table[] = {
251 CHIP(PCI_DEVICE_ID_CIRRUS_5436, BT_ALPINE),
252 CHIP(PCI_DEVICE_ID_CIRRUS_5434_8, BT_ALPINE),
253 CHIP(PCI_DEVICE_ID_CIRRUS_5434_4, BT_ALPINE),
254 CHIP(PCI_DEVICE_ID_CIRRUS_5430, BT_ALPINE), /* GD-5440 is same id */
255 CHIP(PCI_DEVICE_ID_CIRRUS_7543, BT_ALPINE),
256 CHIP(PCI_DEVICE_ID_CIRRUS_7548, BT_ALPINE),
257 CHIP(PCI_DEVICE_ID_CIRRUS_5480, BT_GD5480), /* MacPicasso likely */
258 CHIP(PCI_DEVICE_ID_CIRRUS_5446, BT_PICASSO4), /* Picasso 4 is 5446 */
259 CHIP(PCI_DEVICE_ID_CIRRUS_5462, BT_LAGUNA), /* CL Laguna */
260 CHIP(PCI_DEVICE_ID_CIRRUS_5464, BT_LAGUNA), /* CL Laguna 3D */
261 CHIP(PCI_DEVICE_ID_CIRRUS_5465, BT_LAGUNA), /* CL Laguna 3DA*/
264 MODULE_DEVICE_TABLE(pci, cirrusfb_pci_table);
266 #endif /* CONFIG_PCI */
269 static const struct zorro_device_id cirrusfb_zorro_table[] = {
271 .id = ZORRO_PROD_HELFRICH_SD64_RAM,
272 .driver_data = BT_SD64,
274 .id = ZORRO_PROD_HELFRICH_PICCOLO_RAM,
275 .driver_data = BT_PICCOLO,
277 .id = ZORRO_PROD_VILLAGE_TRONIC_PICASSO_II_II_PLUS_RAM,
278 .driver_data = BT_PICASSO,
280 .id = ZORRO_PROD_GVP_EGS_28_24_SPECTRUM_RAM,
281 .driver_data = BT_SPECTRUM,
283 .id = ZORRO_PROD_VILLAGE_TRONIC_PICASSO_IV_Z3,
284 .driver_data = BT_PICASSO4,
289 static const struct {
292 } cirrusfb_zorro_table2[] = {
294 .id2 = ZORRO_PROD_HELFRICH_SD64_REG,
298 .id2 = ZORRO_PROD_HELFRICH_PICCOLO_REG,
302 .id2 = ZORRO_PROD_VILLAGE_TRONIC_PICASSO_II_II_PLUS_REG,
306 .id2 = ZORRO_PROD_GVP_EGS_28_24_SPECTRUM_REG,
314 #endif /* CONFIG_ZORRO */
316 struct cirrusfb_regs {
320 #ifdef CIRRUSFB_DEBUG
321 enum cirrusfb_dbg_reg_class {
325 #endif /* CIRRUSFB_DEBUG */
327 /* info about board */
328 struct cirrusfb_info {
330 enum cirrus_board btype;
331 unsigned char SFR; /* Shadow of special function register */
333 struct cirrusfb_regs currentmode;
335 u32 pseudo_palette[16];
337 void (*unmap)(struct fb_info *info);
340 static int noaccel __devinitdata;
341 static char *mode_option __devinitdata = "640x480@60";
343 /****************************************************************************/
344 /**** BEGIN PROTOTYPES ******************************************************/
346 /*--- Interface used by the world ------------------------------------------*/
347 static int cirrusfb_init(void);
349 static int cirrusfb_setup(char *options);
352 static int cirrusfb_open(struct fb_info *info, int user);
353 static int cirrusfb_release(struct fb_info *info, int user);
354 static int cirrusfb_setcolreg(unsigned regno, unsigned red, unsigned green,
355 unsigned blue, unsigned transp,
356 struct fb_info *info);
357 static int cirrusfb_check_var(struct fb_var_screeninfo *var,
358 struct fb_info *info);
359 static int cirrusfb_set_par(struct fb_info *info);
360 static int cirrusfb_pan_display(struct fb_var_screeninfo *var,
361 struct fb_info *info);
362 static int cirrusfb_blank(int blank_mode, struct fb_info *info);
363 static void cirrusfb_fillrect(struct fb_info *info,
364 const struct fb_fillrect *region);
365 static void cirrusfb_copyarea(struct fb_info *info,
366 const struct fb_copyarea *area);
367 static void cirrusfb_imageblit(struct fb_info *info,
368 const struct fb_image *image);
370 /* function table of the above functions */
371 static struct fb_ops cirrusfb_ops = {
372 .owner = THIS_MODULE,
373 .fb_open = cirrusfb_open,
374 .fb_release = cirrusfb_release,
375 .fb_setcolreg = cirrusfb_setcolreg,
376 .fb_check_var = cirrusfb_check_var,
377 .fb_set_par = cirrusfb_set_par,
378 .fb_pan_display = cirrusfb_pan_display,
379 .fb_blank = cirrusfb_blank,
380 .fb_fillrect = cirrusfb_fillrect,
381 .fb_copyarea = cirrusfb_copyarea,
382 .fb_imageblit = cirrusfb_imageblit,
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);
398 static void RClut(struct cirrusfb_info *cinfo, unsigned char regnum,
399 unsigned char *red, unsigned char *green,
400 unsigned char *blue);
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 u_char color, u_short line_length);
413 static void bestclock(long freq, int *nom, int *den, int *div);
415 #ifdef CIRRUSFB_DEBUG
416 static void cirrusfb_dbg_reg_dump(struct fb_info *info, caddr_t regbase);
417 static void cirrusfb_dbg_print_regs(struct fb_info *info,
419 enum cirrusfb_dbg_reg_class reg_class, ...);
420 #endif /* CIRRUSFB_DEBUG */
422 /*** END PROTOTYPES ********************************************************/
423 /*****************************************************************************/
424 /*** BEGIN Interface Used by the World ***************************************/
426 static int opencount;
428 /*--- Open /dev/fbx ---------------------------------------------------------*/
429 static int cirrusfb_open(struct fb_info *info, int user)
431 if (opencount++ == 0)
432 switch_monitor(info->par, 1);
436 /*--- Close /dev/fbx --------------------------------------------------------*/
437 static int cirrusfb_release(struct fb_info *info, int user)
439 if (--opencount == 0)
440 switch_monitor(info->par, 0);
444 /**** END Interface used by the World *************************************/
445 /****************************************************************************/
446 /**** BEGIN Hardware specific Routines **************************************/
448 /* Check if the MCLK is not a better clock source */
449 static int cirrusfb_check_mclk(struct fb_info *info, long freq)
451 struct cirrusfb_info *cinfo = info->par;
452 long mclk = vga_rseq(cinfo->regbase, CL_SEQR1F) & 0x3f;
454 /* Read MCLK value */
455 mclk = (14318 * mclk) >> 3;
456 dev_dbg(info->device, "Read MCLK of %ld kHz\n", mclk);
458 /* Determine if we should use MCLK instead of VCLK, and if so, what we
459 * should divide it by to get VCLK
462 if (abs(freq - mclk) < 250) {
463 dev_dbg(info->device, "Using VCLK = MCLK\n");
465 } else if (abs(freq - (mclk / 2)) < 250) {
466 dev_dbg(info->device, "Using VCLK = MCLK/2\n");
473 static int cirrusfb_check_var(struct fb_var_screeninfo *var,
474 struct fb_info *info)
477 /* memory size in pixels */
478 unsigned pixels = info->screen_size * 8 / var->bits_per_pixel;
480 switch (var->bits_per_pixel) {
484 var->green = var->red;
485 var->blue = var->red;
491 var->green = var->red;
492 var->blue = var->red;
498 var->green.offset = -3;
499 var->blue.offset = 8;
501 var->red.offset = 10;
502 var->green.offset = 5;
503 var->blue.offset = 0;
506 var->green.length = 5;
507 var->blue.length = 5;
513 var->green.offset = 16;
514 var->blue.offset = 24;
516 var->red.offset = 16;
517 var->green.offset = 8;
518 var->blue.offset = 0;
521 var->green.length = 8;
522 var->blue.length = 8;
526 dev_dbg(info->device,
527 "Unsupported bpp size: %d\n", var->bits_per_pixel);
529 /* should never occur */
533 if (var->xres_virtual < var->xres)
534 var->xres_virtual = var->xres;
535 /* use highest possible virtual resolution */
536 if (var->yres_virtual == -1) {
537 var->yres_virtual = pixels / var->xres_virtual;
539 dev_info(info->device,
540 "virtual resolution set to maximum of %dx%d\n",
541 var->xres_virtual, var->yres_virtual);
543 if (var->yres_virtual < var->yres)
544 var->yres_virtual = var->yres;
546 if (var->xres_virtual * var->yres_virtual > pixels) {
547 dev_err(info->device, "mode %dx%dx%d rejected... "
548 "virtual resolution too high to fit into video memory!\n",
549 var->xres_virtual, var->yres_virtual,
550 var->bits_per_pixel);
555 if (var->xoffset < 0)
557 if (var->yoffset < 0)
560 /* truncate xoffset and yoffset to maximum if too high */
561 if (var->xoffset > var->xres_virtual - var->xres)
562 var->xoffset = var->xres_virtual - var->xres - 1;
563 if (var->yoffset > var->yres_virtual - var->yres)
564 var->yoffset = var->yres_virtual - var->yres - 1;
567 var->green.msb_right =
568 var->blue.msb_right =
571 var->transp.msb_right = 0;
574 if (var->vmode & FB_VMODE_DOUBLE)
576 else if (var->vmode & FB_VMODE_INTERLACED)
577 yres = (yres + 1) / 2;
580 dev_err(info->device, "ERROR: VerticalTotal >= 1280; "
581 "special treatment required! (TODO)\n");
588 static int cirrusfb_decode_var(const struct fb_var_screeninfo *var,
589 struct cirrusfb_regs *regs,
590 struct fb_info *info)
594 int maxclockidx = var->bits_per_pixel >> 3;
595 struct cirrusfb_info *cinfo = info->par;
597 switch (var->bits_per_pixel) {
599 info->fix.line_length = var->xres_virtual / 8;
600 info->fix.visual = FB_VISUAL_MONO10;
604 info->fix.line_length = var->xres_virtual;
605 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
610 info->fix.line_length = var->xres_virtual * maxclockidx;
611 info->fix.visual = FB_VISUAL_TRUECOLOR;
615 dev_dbg(info->device,
616 "Unsupported bpp size: %d\n", var->bits_per_pixel);
618 /* should never occur */
622 info->fix.type = FB_TYPE_PACKED_PIXELS;
624 /* convert from ps to kHz */
625 freq = PICOS2KHZ(var->pixclock);
627 dev_dbg(info->device, "desired pixclock: %ld kHz\n", freq);
629 maxclock = cirrusfb_board_info[cinfo->btype].maxclock[maxclockidx];
630 regs->multiplexing = 0;
632 /* If the frequency is greater than we can support, we might be able
633 * to use multiplexing for the video mode */
634 if (freq > maxclock) {
635 switch (cinfo->btype) {
638 regs->multiplexing = 1;
642 dev_err(info->device,
643 "Frequency greater than maxclock (%ld kHz)\n",
649 /* TODO: If we have a 1MB 5434, we need to put ourselves in a mode where
650 * the VCLK is double the pixel clock. */
651 switch (var->bits_per_pixel) {
654 if (var->xres <= 800)
655 /* Xbh has this type of clock for 32-bit */
663 static void cirrusfb_set_mclk_as_source(const struct fb_info *info, int div)
665 struct cirrusfb_info *cinfo = info->par;
666 unsigned char old1f, old1e;
668 assert(cinfo != NULL);
669 old1f = vga_rseq(cinfo->regbase, CL_SEQR1F) & ~0x40;
672 dev_dbg(info->device, "Set %s as pixclock source.\n",
673 (div == 2) ? "MCLK/2" : "MCLK");
675 old1e = vga_rseq(cinfo->regbase, CL_SEQR1E) & ~0x1;
679 vga_wseq(cinfo->regbase, CL_SEQR1E, old1e);
681 vga_wseq(cinfo->regbase, CL_SEQR1F, old1f);
684 /*************************************************************************
685 cirrusfb_set_par_foo()
687 actually writes the values for a new video mode into the hardware,
688 **************************************************************************/
689 static int cirrusfb_set_par_foo(struct fb_info *info)
691 struct cirrusfb_info *cinfo = info->par;
692 struct fb_var_screeninfo *var = &info->var;
693 struct cirrusfb_regs regs;
694 u8 __iomem *regbase = cinfo->regbase;
697 const struct cirrusfb_board_info_rec *bi;
698 int hdispend, hsyncstart, hsyncend, htotal;
699 int yres, vdispend, vsyncstart, vsyncend, vtotal;
703 dev_dbg(info->device, "Requested mode: %dx%dx%d\n",
704 var->xres, var->yres, var->bits_per_pixel);
705 dev_dbg(info->device, "pixclock: %d\n", var->pixclock);
709 err = cirrusfb_decode_var(var, ®s, info);
711 /* should never happen */
712 dev_dbg(info->device, "mode change aborted. invalid var.\n");
716 bi = &cirrusfb_board_info[cinfo->btype];
718 hsyncstart = var->xres + var->right_margin;
719 hsyncend = hsyncstart + var->hsync_len;
720 htotal = (hsyncend + var->left_margin) / 8 - 5;
721 hdispend = var->xres / 8 - 1;
722 hsyncstart = hsyncstart / 8 + 1;
723 hsyncend = hsyncend / 8 + 1;
726 vsyncstart = yres + var->lower_margin;
727 vsyncend = vsyncstart + var->vsync_len;
728 vtotal = vsyncend + var->upper_margin;
731 if (var->vmode & FB_VMODE_DOUBLE) {
736 } else if (var->vmode & FB_VMODE_INTERLACED) {
737 yres = (yres + 1) / 2;
738 vsyncstart = (vsyncstart + 1) / 2;
739 vsyncend = (vsyncend + 1) / 2;
740 vtotal = (vtotal + 1) / 2;
753 if (regs.multiplexing) {
759 /* unlock register VGA_CRTC_H_TOTAL..CRT7 */
760 vga_wcrt(regbase, VGA_CRTC_V_SYNC_END, 0x20); /* previously: 0x00) */
762 /* if debugging is enabled, all parameters get output before writing */
763 dev_dbg(info->device, "CRT0: %d\n", htotal);
764 vga_wcrt(regbase, VGA_CRTC_H_TOTAL, htotal);
766 dev_dbg(info->device, "CRT1: %d\n", hdispend);
767 vga_wcrt(regbase, VGA_CRTC_H_DISP, hdispend);
769 dev_dbg(info->device, "CRT2: %d\n", var->xres / 8);
770 vga_wcrt(regbase, VGA_CRTC_H_BLANK_START, var->xres / 8);
772 /* + 128: Compatible read */
773 dev_dbg(info->device, "CRT3: 128+%d\n", (htotal + 5) % 32);
774 vga_wcrt(regbase, VGA_CRTC_H_BLANK_END,
775 128 + ((htotal + 5) % 32));
777 dev_dbg(info->device, "CRT4: %d\n", hsyncstart);
778 vga_wcrt(regbase, VGA_CRTC_H_SYNC_START, hsyncstart);
781 if ((htotal + 5) & 32)
783 dev_dbg(info->device, "CRT5: %d\n", tmp);
784 vga_wcrt(regbase, VGA_CRTC_H_SYNC_END, tmp);
786 dev_dbg(info->device, "CRT6: %d\n", vtotal & 0xff);
787 vga_wcrt(regbase, VGA_CRTC_V_TOTAL, vtotal & 0xff);
789 tmp = 16; /* LineCompare bit #9 */
794 if (vsyncstart & 256)
796 if ((vdispend + 1) & 256)
802 if (vsyncstart & 512)
804 dev_dbg(info->device, "CRT7: %d\n", tmp);
805 vga_wcrt(regbase, VGA_CRTC_OVERFLOW, tmp);
807 tmp = 0x40; /* LineCompare bit #8 */
808 if ((vdispend + 1) & 512)
810 if (var->vmode & FB_VMODE_DOUBLE)
812 dev_dbg(info->device, "CRT9: %d\n", tmp);
813 vga_wcrt(regbase, VGA_CRTC_MAX_SCAN, tmp);
815 dev_dbg(info->device, "CRT10: %d\n", vsyncstart & 0xff);
816 vga_wcrt(regbase, VGA_CRTC_V_SYNC_START, vsyncstart & 0xff);
818 dev_dbg(info->device, "CRT11: 64+32+%d\n", vsyncend % 16);
819 vga_wcrt(regbase, VGA_CRTC_V_SYNC_END, vsyncend % 16 + 64 + 32);
821 dev_dbg(info->device, "CRT12: %d\n", vdispend & 0xff);
822 vga_wcrt(regbase, VGA_CRTC_V_DISP_END, vdispend & 0xff);
824 dev_dbg(info->device, "CRT15: %d\n", (vdispend + 1) & 0xff);
825 vga_wcrt(regbase, VGA_CRTC_V_BLANK_START, (vdispend + 1) & 0xff);
827 dev_dbg(info->device, "CRT16: %d\n", vtotal & 0xff);
828 vga_wcrt(regbase, VGA_CRTC_V_BLANK_END, vtotal & 0xff);
830 dev_dbg(info->device, "CRT18: 0xff\n");
831 vga_wcrt(regbase, VGA_CRTC_LINE_COMPARE, 0xff);
834 if (var->vmode & FB_VMODE_INTERLACED)
836 if ((htotal + 5) & 64)
838 if ((htotal + 5) & 128)
845 dev_dbg(info->device, "CRT1a: %d\n", tmp);
846 vga_wcrt(regbase, CL_CRT1A, tmp);
848 freq = PICOS2KHZ(var->pixclock);
849 bestclock(freq, &nom, &den, &div);
851 dev_dbg(info->device, "VCLK freq: %ld kHz nom: %d den: %d div: %d\n",
852 freq, nom, den, div);
855 /* hardware RefClock: 14.31818 MHz */
856 /* formula: VClk = (OSC * N) / (D * (1+P)) */
857 /* Example: VClk = (14.31818 * 91) / (23 * (1+1)) = 28.325 MHz */
859 if (cinfo->btype == BT_ALPINE) {
860 /* if freq is close to mclk or mclk/2 select mclk
863 int divMCLK = cirrusfb_check_mclk(info, freq);
866 cirrusfb_set_mclk_as_source(info, divMCLK);
870 vga_wseq(regbase, CL_SEQRB, nom);
875 /* 6 bit denom; ONLY 5434!!! (bugged me 10 days) */
876 if ((cinfo->btype == BT_SD64) ||
877 (cinfo->btype == BT_ALPINE) ||
878 (cinfo->btype == BT_GD5480))
881 dev_dbg(info->device, "CL_SEQR1B: %ld\n", (long) tmp);
882 vga_wseq(regbase, CL_SEQR1B, tmp);
887 vga_wcrt(regbase, VGA_CRTC_MODE, 0xc7);
889 /* mode control: VGA_CRTC_START_HI enable, ROTATE(?), 16bit
890 * address wrap, no compat. */
891 vga_wcrt(regbase, VGA_CRTC_MODE, 0xc3);
893 /* HAEH? vga_wcrt(regbase, VGA_CRTC_V_SYNC_END, 0x20);
894 * previously: 0x00 unlock VGA_CRTC_H_TOTAL..CRT7 */
896 /* don't know if it would hurt to also program this if no interlaced */
897 /* mode is used, but I feel better this way.. :-) */
898 if (var->vmode & FB_VMODE_INTERLACED)
899 vga_wcrt(regbase, VGA_CRTC_REGS, htotal / 2);
901 vga_wcrt(regbase, VGA_CRTC_REGS, 0x00); /* interlace control */
903 vga_wseq(regbase, VGA_SEQ_CHARACTER_MAP, 0);
905 /* adjust horizontal/vertical sync type (low/high) */
906 /* enable display memory & CRTC I/O address for color mode */
908 if (var->sync & FB_SYNC_HOR_HIGH_ACT)
910 if (var->sync & FB_SYNC_VERT_HIGH_ACT)
912 WGen(cinfo, VGA_MIS_W, tmp);
914 /* Screen A Preset Row-Scan register */
915 vga_wcrt(regbase, VGA_CRTC_PRESET_ROW, 0);
916 /* text cursor on and start line */
917 vga_wcrt(regbase, VGA_CRTC_CURSOR_START, 0);
918 /* text cursor end line */
919 vga_wcrt(regbase, VGA_CRTC_CURSOR_END, 31);
921 /******************************************************
927 /* programming for different color depths */
928 if (var->bits_per_pixel == 1) {
929 dev_dbg(info->device, "preparing for 1 bit deep display\n");
930 vga_wgfx(regbase, VGA_GFX_MODE, 0); /* mode register */
933 switch (cinfo->btype) {
941 vga_wseq(regbase, CL_SEQR7,
943 bi->sr07_1bpp_mux : bi->sr07_1bpp);
947 vga_wseq(regbase, CL_SEQR7,
948 vga_rseq(regbase, CL_SEQR7) & ~0x01);
952 dev_warn(info->device, "unknown Board\n");
956 /* Extended Sequencer Mode */
957 switch (cinfo->btype) {
959 /* setting the SEQRF on SD64 is not necessary
963 vga_wseq(regbase, CL_SEQR1F, 0x1a);
968 /* ### ueberall 0x22? */
969 /* ##vorher 1c MCLK select */
970 vga_wseq(regbase, CL_SEQR1F, 0x22);
971 /* evtl d0 bei 1 bit? avoid FIFO underruns..? */
972 vga_wseq(regbase, CL_SEQRF, 0xb0);
976 /* ##vorher 22 MCLK select */
977 vga_wseq(regbase, CL_SEQR1F, 0x22);
978 /* ## vorher d0 avoid FIFO underruns..? */
979 vga_wseq(regbase, CL_SEQRF, 0xd0);
990 dev_warn(info->device, "unknown Board\n");
994 /* pixel mask: pass-through for first plane */
995 WGen(cinfo, VGA_PEL_MSK, 0x01);
996 if (regs.multiplexing)
997 /* hidden dac reg: 1280x1024 */
1000 /* hidden dac: nothing */
1002 /* memory mode: odd/even, ext. memory */
1003 vga_wseq(regbase, VGA_SEQ_MEMORY_MODE, 0x06);
1004 /* plane mask: only write to first plane */
1005 vga_wseq(regbase, VGA_SEQ_PLANE_WRITE, 0x01);
1006 offset = var->xres_virtual / 16;
1009 /******************************************************
1015 else if (var->bits_per_pixel == 8) {
1016 dev_dbg(info->device, "preparing for 8 bit deep display\n");
1017 switch (cinfo->btype) {
1025 vga_wseq(regbase, CL_SEQR7,
1027 bi->sr07_8bpp_mux : bi->sr07_8bpp);
1031 vga_wseq(regbase, CL_SEQR7,
1032 vga_rseq(regbase, CL_SEQR7) | 0x01);
1036 dev_warn(info->device, "unknown Board\n");
1040 switch (cinfo->btype) {
1043 vga_wseq(regbase, CL_SEQR1F, 0x1d);
1049 /* ### vorher 1c MCLK select */
1050 vga_wseq(regbase, CL_SEQR1F, 0x22);
1051 /* Fast Page-Mode writes */
1052 vga_wseq(regbase, CL_SEQRF, 0xb0);
1057 /* ### INCOMPLETE!! */
1058 vga_wseq(regbase, CL_SEQRF, 0xb8);
1060 /* vga_wseq(regbase, CL_SEQR1F, 0x1c); */
1064 /* We already set SRF and SR1F */
1073 dev_warn(info->device, "unknown board\n");
1077 /* mode register: 256 color mode */
1078 vga_wgfx(regbase, VGA_GFX_MODE, 64);
1079 /* pixel mask: pass-through all planes */
1080 WGen(cinfo, VGA_PEL_MSK, 0xff);
1081 if (regs.multiplexing)
1082 /* hidden dac reg: 1280x1024 */
1085 /* hidden dac: nothing */
1087 /* memory mode: chain4, ext. memory */
1088 vga_wseq(regbase, VGA_SEQ_MEMORY_MODE, 0x0a);
1089 /* plane mask: enable writing to all 4 planes */
1090 vga_wseq(regbase, VGA_SEQ_PLANE_WRITE, 0xff);
1091 offset = var->xres_virtual / 8;
1094 /******************************************************
1100 else if (var->bits_per_pixel == 16) {
1101 dev_dbg(info->device, "preparing for 16 bit deep display\n");
1102 switch (cinfo->btype) {
1104 /* Extended Sequencer Mode: 256c col. mode */
1105 vga_wseq(regbase, CL_SEQR7, 0xf7);
1107 vga_wseq(regbase, CL_SEQR1F, 0x1e);
1112 vga_wseq(regbase, CL_SEQR7, 0x87);
1113 /* Fast Page-Mode writes */
1114 vga_wseq(regbase, CL_SEQRF, 0xb0);
1116 vga_wseq(regbase, CL_SEQR1F, 0x22);
1120 vga_wseq(regbase, CL_SEQR7, 0x27);
1121 /* Fast Page-Mode writes */
1122 vga_wseq(regbase, CL_SEQRF, 0xb0);
1124 vga_wseq(regbase, CL_SEQR1F, 0x22);
1128 vga_wseq(regbase, CL_SEQR7, 0x27);
1129 /* vga_wseq(regbase, CL_SEQR1F, 0x1c); */
1133 vga_wseq(regbase, CL_SEQR7, 0xa7);
1137 vga_wseq(regbase, CL_SEQR7, 0x17);
1138 /* We already set SRF and SR1F */
1142 vga_wseq(regbase, CL_SEQR7,
1143 vga_rseq(regbase, CL_SEQR7) & ~0x01);
1147 dev_warn(info->device, "unknown Board\n");
1151 /* mode register: 256 color mode */
1152 vga_wgfx(regbase, VGA_GFX_MODE, 64);
1153 /* pixel mask: pass-through all planes */
1154 WGen(cinfo, VGA_PEL_MSK, 0xff);
1156 WHDR(cinfo, 0xc0); /* Copy Xbh */
1157 #elif defined(CONFIG_ZORRO)
1158 /* FIXME: CONFIG_PCI and CONFIG_ZORRO may be defined both */
1159 WHDR(cinfo, 0xa0); /* hidden dac reg: nothing special */
1161 /* memory mode: chain4, ext. memory */
1162 vga_wseq(regbase, VGA_SEQ_MEMORY_MODE, 0x0a);
1163 /* plane mask: enable writing to all 4 planes */
1164 vga_wseq(regbase, VGA_SEQ_PLANE_WRITE, 0xff);
1165 offset = var->xres_virtual / 4;
1168 /******************************************************
1174 else if (var->bits_per_pixel == 32) {
1175 dev_dbg(info->device, "preparing for 32 bit deep display\n");
1176 switch (cinfo->btype) {
1178 /* Extended Sequencer Mode: 256c col. mode */
1179 vga_wseq(regbase, CL_SEQR7, 0xf9);
1181 vga_wseq(regbase, CL_SEQR1F, 0x1e);
1186 vga_wseq(regbase, CL_SEQR7, 0x85);
1187 /* Fast Page-Mode writes */
1188 vga_wseq(regbase, CL_SEQRF, 0xb0);
1190 vga_wseq(regbase, CL_SEQR1F, 0x22);
1194 vga_wseq(regbase, CL_SEQR7, 0x25);
1195 /* Fast Page-Mode writes */
1196 vga_wseq(regbase, CL_SEQRF, 0xb0);
1198 vga_wseq(regbase, CL_SEQR1F, 0x22);
1202 vga_wseq(regbase, CL_SEQR7, 0x25);
1203 /* vga_wseq(regbase, CL_SEQR1F, 0x1c); */
1207 vga_wseq(regbase, CL_SEQR7, 0xa9);
1211 vga_wseq(regbase, CL_SEQR7, 0x19);
1212 /* We already set SRF and SR1F */
1216 vga_wseq(regbase, CL_SEQR7,
1217 vga_rseq(regbase, CL_SEQR7) & ~0x01);
1221 dev_warn(info->device, "unknown Board\n");
1225 /* mode register: 256 color mode */
1226 vga_wgfx(regbase, VGA_GFX_MODE, 64);
1227 /* pixel mask: pass-through all planes */
1228 WGen(cinfo, VGA_PEL_MSK, 0xff);
1229 /* hidden dac reg: 8-8-8 mode (24 or 32) */
1231 /* memory mode: chain4, ext. memory */
1232 vga_wseq(regbase, VGA_SEQ_MEMORY_MODE, 0x0a);
1233 /* plane mask: enable writing to all 4 planes */
1234 vga_wseq(regbase, VGA_SEQ_PLANE_WRITE, 0xff);
1235 offset = var->xres_virtual / 4;
1238 /******************************************************
1240 * unknown/unsupported bpp
1245 dev_err(info->device,
1246 "What's this? requested color depth == %d.\n",
1247 var->bits_per_pixel);
1249 vga_wcrt(regbase, VGA_CRTC_OFFSET, offset & 0xff);
1252 tmp |= 0x10; /* offset overflow bit */
1254 /* screen start addr #16-18, fastpagemode cycles */
1255 vga_wcrt(regbase, CL_CRT1B, tmp);
1257 if (cinfo->btype == BT_SD64 ||
1258 cinfo->btype == BT_PICASSO4 ||
1259 cinfo->btype == BT_ALPINE ||
1260 cinfo->btype == BT_GD5480)
1261 /* screen start address bit 19 */
1262 vga_wcrt(regbase, CL_CRT1D, 0x00);
1264 /* text cursor location high */
1265 vga_wcrt(regbase, VGA_CRTC_CURSOR_HI, 0);
1266 /* text cursor location low */
1267 vga_wcrt(regbase, VGA_CRTC_CURSOR_LO, 0);
1268 /* underline row scanline = at very bottom */
1269 vga_wcrt(regbase, VGA_CRTC_UNDERLINE, 0);
1271 /* controller mode */
1272 vga_wattr(regbase, VGA_ATC_MODE, 1);
1273 /* overscan (border) color */
1274 vga_wattr(regbase, VGA_ATC_OVERSCAN, 0);
1275 /* color plane enable */
1276 vga_wattr(regbase, VGA_ATC_PLANE_ENABLE, 15);
1278 vga_wattr(regbase, CL_AR33, 0);
1280 vga_wattr(regbase, VGA_ATC_COLOR_PAGE, 0);
1282 /* [ EGS: SetOffset(); ] */
1283 /* From SetOffset(): Turn on VideoEnable bit in Attribute controller */
1286 /* set/reset register */
1287 vga_wgfx(regbase, VGA_GFX_SR_VALUE, 0);
1288 /* set/reset enable */
1289 vga_wgfx(regbase, VGA_GFX_SR_ENABLE, 0);
1291 vga_wgfx(regbase, VGA_GFX_COMPARE_VALUE, 0);
1293 vga_wgfx(regbase, VGA_GFX_DATA_ROTATE, 0);
1294 /* read map select */
1295 vga_wgfx(regbase, VGA_GFX_PLANE_READ, 0);
1296 /* miscellaneous register */
1297 vga_wgfx(regbase, VGA_GFX_MISC, 1);
1298 /* color don't care */
1299 vga_wgfx(regbase, VGA_GFX_COMPARE_MASK, 15);
1301 vga_wgfx(regbase, VGA_GFX_BIT_MASK, 255);
1303 /* graphics cursor attributes: nothing special */
1304 vga_wseq(regbase, CL_SEQR12, 0x0);
1306 /* finally, turn on everything - turn off "FullBandwidth" bit */
1307 /* also, set "DotClock%2" bit where requested */
1310 /*** FB_VMODE_CLOCK_HALVE in linux/fb.h not defined anymore ?
1311 if (var->vmode & FB_VMODE_CLOCK_HALVE)
1315 vga_wseq(regbase, VGA_SEQ_CLOCK_MODE, tmp);
1316 dev_dbg(info->device, "CL_SEQR1: %d\n", tmp);
1318 cinfo->currentmode = regs;
1320 /* pan to requested offset */
1321 cirrusfb_pan_display(var, info);
1323 #ifdef CIRRUSFB_DEBUG
1324 cirrusfb_dbg_reg_dump(info, NULL);
1330 /* for some reason incomprehensible to me, cirrusfb requires that you write
1331 * the registers twice for the settings to take..grr. -dte */
1332 static int cirrusfb_set_par(struct fb_info *info)
1334 cirrusfb_set_par_foo(info);
1335 return cirrusfb_set_par_foo(info);
1338 static int cirrusfb_setcolreg(unsigned regno, unsigned red, unsigned green,
1339 unsigned blue, unsigned transp,
1340 struct fb_info *info)
1342 struct cirrusfb_info *cinfo = info->par;
1347 if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
1349 red >>= (16 - info->var.red.length);
1350 green >>= (16 - info->var.green.length);
1351 blue >>= (16 - info->var.blue.length);
1355 v = (red << info->var.red.offset) |
1356 (green << info->var.green.offset) |
1357 (blue << info->var.blue.offset);
1359 cinfo->pseudo_palette[regno] = v;
1363 if (info->var.bits_per_pixel == 8)
1364 WClut(cinfo, regno, red >> 10, green >> 10, blue >> 10);
1370 /*************************************************************************
1371 cirrusfb_pan_display()
1373 performs display panning - provided hardware permits this
1374 **************************************************************************/
1375 static int cirrusfb_pan_display(struct fb_var_screeninfo *var,
1376 struct fb_info *info)
1381 unsigned char tmp = 0, tmp2 = 0, xpix;
1382 struct cirrusfb_info *cinfo = info->par;
1384 dev_dbg(info->device,
1385 "virtual offset: (%d,%d)\n", var->xoffset, var->yoffset);
1387 /* no range checks for xoffset and yoffset, */
1388 /* as fb_pan_display has already done this */
1389 if (var->vmode & FB_VMODE_YWRAP)
1392 info->var.xoffset = var->xoffset;
1393 info->var.yoffset = var->yoffset;
1395 xoffset = var->xoffset * info->var.bits_per_pixel / 8;
1396 yoffset = var->yoffset;
1398 base = yoffset * info->fix.line_length + xoffset;
1400 if (info->var.bits_per_pixel == 1) {
1401 /* base is already correct */
1402 xpix = (unsigned char) (var->xoffset % 8);
1405 xpix = (unsigned char) ((xoffset % 4) * 2);
1408 cirrusfb_WaitBLT(cinfo->regbase); /* make sure all the BLT's are done */
1410 /* lower 8 + 8 bits of screen start address */
1411 vga_wcrt(cinfo->regbase, VGA_CRTC_START_LO,
1412 (unsigned char) (base & 0xff));
1413 vga_wcrt(cinfo->regbase, VGA_CRTC_START_HI,
1414 (unsigned char) (base >> 8));
1416 /* construct bits 16, 17 and 18 of screen start address */
1424 /* 0xf2 is %11110010, exclude tmp bits */
1425 tmp2 = (vga_rcrt(cinfo->regbase, CL_CRT1B) & 0xf2) | tmp;
1426 vga_wcrt(cinfo->regbase, CL_CRT1B, tmp2);
1428 /* construct bit 19 of screen start address */
1429 if (cirrusfb_board_info[cinfo->btype].scrn_start_bit19)
1430 vga_wcrt(cinfo->regbase, CL_CRT1D, (base >> 12) & 0x80);
1432 /* write pixel panning value to AR33; this does not quite work in 8bpp
1434 * ### Piccolo..? Will this work?
1436 if (info->var.bits_per_pixel == 1)
1437 vga_wattr(cinfo->regbase, CL_AR33, xpix);
1439 cirrusfb_WaitBLT(cinfo->regbase);
1444 static int cirrusfb_blank(int blank_mode, struct fb_info *info)
1447 * Blank the screen if blank_mode != 0, else unblank. If blank == NULL
1448 * then the caller blanks by setting the CLUT (Color Look Up Table)
1449 * to all black. Return 0 if blanking succeeded, != 0 if un-/blanking
1450 * failed due to e.g. a video mode which doesn't support it.
1451 * Implements VESA suspend and powerdown modes on hardware that
1452 * supports disabling hsync/vsync:
1453 * blank_mode == 2: suspend vsync
1454 * blank_mode == 3: suspend hsync
1455 * blank_mode == 4: powerdown
1458 struct cirrusfb_info *cinfo = info->par;
1459 int current_mode = cinfo->blank_mode;
1461 dev_dbg(info->device, "ENTER, blank mode = %d\n", blank_mode);
1463 if (info->state != FBINFO_STATE_RUNNING ||
1464 current_mode == blank_mode) {
1465 dev_dbg(info->device, "EXIT, returning 0\n");
1470 if (current_mode == FB_BLANK_NORMAL ||
1471 current_mode == FB_BLANK_UNBLANK) {
1472 /* unblank the screen */
1473 val = vga_rseq(cinfo->regbase, VGA_SEQ_CLOCK_MODE);
1474 /* clear "FullBandwidth" bit */
1475 vga_wseq(cinfo->regbase, VGA_SEQ_CLOCK_MODE, val & 0xdf);
1476 /* and undo VESA suspend trickery */
1477 vga_wgfx(cinfo->regbase, CL_GRE, 0x00);
1481 if (blank_mode > FB_BLANK_NORMAL) {
1482 /* blank the screen */
1483 val = vga_rseq(cinfo->regbase, VGA_SEQ_CLOCK_MODE);
1484 /* set "FullBandwidth" bit */
1485 vga_wseq(cinfo->regbase, VGA_SEQ_CLOCK_MODE, val | 0x20);
1488 switch (blank_mode) {
1489 case FB_BLANK_UNBLANK:
1490 case FB_BLANK_NORMAL:
1492 case FB_BLANK_VSYNC_SUSPEND:
1493 vga_wgfx(cinfo->regbase, CL_GRE, 0x04);
1495 case FB_BLANK_HSYNC_SUSPEND:
1496 vga_wgfx(cinfo->regbase, CL_GRE, 0x02);
1498 case FB_BLANK_POWERDOWN:
1499 vga_wgfx(cinfo->regbase, CL_GRE, 0x06);
1502 dev_dbg(info->device, "EXIT, returning 1\n");
1506 cinfo->blank_mode = blank_mode;
1507 dev_dbg(info->device, "EXIT, returning 0\n");
1509 /* Let fbcon do a soft blank for us */
1510 return (blank_mode == FB_BLANK_NORMAL) ? 1 : 0;
1512 /**** END Hardware specific Routines **************************************/
1513 /****************************************************************************/
1514 /**** BEGIN Internal Routines ***********************************************/
1516 static void init_vgachip(struct fb_info *info)
1518 struct cirrusfb_info *cinfo = info->par;
1519 const struct cirrusfb_board_info_rec *bi;
1521 assert(cinfo != NULL);
1523 bi = &cirrusfb_board_info[cinfo->btype];
1525 /* reset board globally */
1526 switch (cinfo->btype) {
1545 /* disable flickerfixer */
1546 vga_wcrt(cinfo->regbase, CL_CRT51, 0x00);
1548 /* from Klaus' NetBSD driver: */
1549 vga_wgfx(cinfo->regbase, CL_GR2F, 0x00);
1550 /* put blitter into 542x compat */
1551 vga_wgfx(cinfo->regbase, CL_GR33, 0x00);
1553 vga_wgfx(cinfo->regbase, CL_GR31, 0x00);
1557 /* from Klaus' NetBSD driver: */
1558 vga_wgfx(cinfo->regbase, CL_GR2F, 0x00);
1562 /* Nothing to do to reset the board. */
1566 dev_err(info->device, "Warning: Unknown board type\n");
1570 /* make sure RAM size set by this point */
1571 assert(info->screen_size > 0);
1573 /* the P4 is not fully initialized here; I rely on it having been */
1574 /* inited under AmigaOS already, which seems to work just fine */
1575 /* (Klaus advised to do it this way) */
1577 if (cinfo->btype != BT_PICASSO4) {
1578 WGen(cinfo, CL_VSSM, 0x10); /* EGS: 0x16 */
1579 WGen(cinfo, CL_POS102, 0x01);
1580 WGen(cinfo, CL_VSSM, 0x08); /* EGS: 0x0e */
1582 if (cinfo->btype != BT_SD64)
1583 WGen(cinfo, CL_VSSM2, 0x01);
1585 /* reset sequencer logic */
1586 vga_wseq(cinfo->regbase, CL_SEQR0, 0x03);
1588 /* FullBandwidth (video off) and 8/9 dot clock */
1589 vga_wseq(cinfo->regbase, VGA_SEQ_CLOCK_MODE, 0x21);
1590 /* polarity (-/-), disable access to display memory,
1591 * VGA_CRTC_START_HI base address: color
1593 WGen(cinfo, VGA_MIS_W, 0xc1);
1595 /* "magic cookie" - doesn't make any sense to me.. */
1596 /* vga_wgfx(cinfo->regbase, CL_GRA, 0xce); */
1597 /* unlock all extension registers */
1598 vga_wseq(cinfo->regbase, CL_SEQR6, 0x12);
1601 vga_wgfx(cinfo->regbase, CL_GR31, 0x04);
1603 switch (cinfo->btype) {
1605 vga_wseq(cinfo->regbase, CL_SEQRF, 0x98);
1610 vga_wseq(cinfo->regbase, CL_SEQRF, 0xb8);
1613 vga_wseq(cinfo->regbase, CL_SEQR16, 0x0f);
1614 vga_wseq(cinfo->regbase, CL_SEQRF, 0xb0);
1618 /* plane mask: nothing */
1619 vga_wseq(cinfo->regbase, VGA_SEQ_PLANE_WRITE, 0xff);
1620 /* character map select: doesn't even matter in gx mode */
1621 vga_wseq(cinfo->regbase, VGA_SEQ_CHARACTER_MAP, 0x00);
1622 /* memory mode: chain-4, no odd/even, ext. memory */
1623 vga_wseq(cinfo->regbase, VGA_SEQ_MEMORY_MODE, 0x0e);
1625 /* controller-internal base address of video memory */
1627 vga_wseq(cinfo->regbase, CL_SEQR7, bi->sr07);
1629 /* vga_wseq(cinfo->regbase, CL_SEQR8, 0x00); */
1630 /* EEPROM control: shouldn't be necessary to write to this at all.. */
1632 /* graphics cursor X position (incomplete; position gives rem. 3 bits */
1633 vga_wseq(cinfo->regbase, CL_SEQR10, 0x00);
1634 /* graphics cursor Y position (..."... ) */
1635 vga_wseq(cinfo->regbase, CL_SEQR11, 0x00);
1636 /* graphics cursor attributes */
1637 vga_wseq(cinfo->regbase, CL_SEQR12, 0x00);
1638 /* graphics cursor pattern address */
1639 vga_wseq(cinfo->regbase, CL_SEQR13, 0x00);
1641 /* writing these on a P4 might give problems.. */
1642 if (cinfo->btype != BT_PICASSO4) {
1643 /* configuration readback and ext. color */
1644 vga_wseq(cinfo->regbase, CL_SEQR17, 0x00);
1645 /* signature generator */
1646 vga_wseq(cinfo->regbase, CL_SEQR18, 0x02);
1649 /* MCLK select etc. */
1651 vga_wseq(cinfo->regbase, CL_SEQR1F, bi->sr1f);
1653 /* Screen A preset row scan: none */
1654 vga_wcrt(cinfo->regbase, VGA_CRTC_PRESET_ROW, 0x00);
1655 /* Text cursor start: disable text cursor */
1656 vga_wcrt(cinfo->regbase, VGA_CRTC_CURSOR_START, 0x20);
1657 /* Text cursor end: - */
1658 vga_wcrt(cinfo->regbase, VGA_CRTC_CURSOR_END, 0x00);
1659 /* Screen start address high: 0 */
1660 vga_wcrt(cinfo->regbase, VGA_CRTC_START_HI, 0x00);
1661 /* Screen start address low: 0 */
1662 vga_wcrt(cinfo->regbase, VGA_CRTC_START_LO, 0x00);
1663 /* text cursor location high: 0 */
1664 vga_wcrt(cinfo->regbase, VGA_CRTC_CURSOR_HI, 0x00);
1665 /* text cursor location low: 0 */
1666 vga_wcrt(cinfo->regbase, VGA_CRTC_CURSOR_LO, 0x00);
1668 /* Underline Row scanline: - */
1669 vga_wcrt(cinfo->regbase, VGA_CRTC_UNDERLINE, 0x00);
1670 /* mode control: timing enable, byte mode, no compat modes */
1671 vga_wcrt(cinfo->regbase, VGA_CRTC_MODE, 0xc3);
1672 /* Line Compare: not needed */
1673 vga_wcrt(cinfo->regbase, VGA_CRTC_LINE_COMPARE, 0x00);
1674 /* ### add 0x40 for text modes with > 30 MHz pixclock */
1675 /* ext. display controls: ext.adr. wrap */
1676 vga_wcrt(cinfo->regbase, CL_CRT1B, 0x02);
1678 /* Set/Reset registes: - */
1679 vga_wgfx(cinfo->regbase, VGA_GFX_SR_VALUE, 0x00);
1680 /* Set/Reset enable: - */
1681 vga_wgfx(cinfo->regbase, VGA_GFX_SR_ENABLE, 0x00);
1682 /* Color Compare: - */
1683 vga_wgfx(cinfo->regbase, VGA_GFX_COMPARE_VALUE, 0x00);
1684 /* Data Rotate: - */
1685 vga_wgfx(cinfo->regbase, VGA_GFX_DATA_ROTATE, 0x00);
1686 /* Read Map Select: - */
1687 vga_wgfx(cinfo->regbase, VGA_GFX_PLANE_READ, 0x00);
1688 /* Mode: conf. for 16/4/2 color mode, no odd/even, read/write mode 0 */
1689 vga_wgfx(cinfo->regbase, VGA_GFX_MODE, 0x00);
1690 /* Miscellaneous: memory map base address, graphics mode */
1691 vga_wgfx(cinfo->regbase, VGA_GFX_MISC, 0x01);
1692 /* Color Don't care: involve all planes */
1693 vga_wgfx(cinfo->regbase, VGA_GFX_COMPARE_MASK, 0x0f);
1694 /* Bit Mask: no mask at all */
1695 vga_wgfx(cinfo->regbase, VGA_GFX_BIT_MASK, 0xff);
1696 if (cinfo->btype == BT_ALPINE)
1697 /* (5434 can't have bit 3 set for bitblt) */
1698 vga_wgfx(cinfo->regbase, CL_GRB, 0x20);
1700 /* Graphics controller mode extensions: finer granularity,
1701 * 8byte data latches
1703 vga_wgfx(cinfo->regbase, CL_GRB, 0x28);
1705 vga_wgfx(cinfo->regbase, CL_GRC, 0xff); /* Color Key compare: - */
1706 vga_wgfx(cinfo->regbase, CL_GRD, 0x00); /* Color Key compare mask: - */
1707 vga_wgfx(cinfo->regbase, CL_GRE, 0x00); /* Miscellaneous control: - */
1708 /* Background color byte 1: - */
1709 /* vga_wgfx (cinfo->regbase, CL_GR10, 0x00); */
1710 /* vga_wgfx (cinfo->regbase, CL_GR11, 0x00); */
1712 /* Attribute Controller palette registers: "identity mapping" */
1713 vga_wattr(cinfo->regbase, VGA_ATC_PALETTE0, 0x00);
1714 vga_wattr(cinfo->regbase, VGA_ATC_PALETTE1, 0x01);
1715 vga_wattr(cinfo->regbase, VGA_ATC_PALETTE2, 0x02);
1716 vga_wattr(cinfo->regbase, VGA_ATC_PALETTE3, 0x03);
1717 vga_wattr(cinfo->regbase, VGA_ATC_PALETTE4, 0x04);
1718 vga_wattr(cinfo->regbase, VGA_ATC_PALETTE5, 0x05);
1719 vga_wattr(cinfo->regbase, VGA_ATC_PALETTE6, 0x06);
1720 vga_wattr(cinfo->regbase, VGA_ATC_PALETTE7, 0x07);
1721 vga_wattr(cinfo->regbase, VGA_ATC_PALETTE8, 0x08);
1722 vga_wattr(cinfo->regbase, VGA_ATC_PALETTE9, 0x09);
1723 vga_wattr(cinfo->regbase, VGA_ATC_PALETTEA, 0x0a);
1724 vga_wattr(cinfo->regbase, VGA_ATC_PALETTEB, 0x0b);
1725 vga_wattr(cinfo->regbase, VGA_ATC_PALETTEC, 0x0c);
1726 vga_wattr(cinfo->regbase, VGA_ATC_PALETTED, 0x0d);
1727 vga_wattr(cinfo->regbase, VGA_ATC_PALETTEE, 0x0e);
1728 vga_wattr(cinfo->regbase, VGA_ATC_PALETTEF, 0x0f);
1730 /* Attribute Controller mode: graphics mode */
1731 vga_wattr(cinfo->regbase, VGA_ATC_MODE, 0x01);
1732 /* Overscan color reg.: reg. 0 */
1733 vga_wattr(cinfo->regbase, VGA_ATC_OVERSCAN, 0x00);
1734 /* Color Plane enable: Enable all 4 planes */
1735 vga_wattr(cinfo->regbase, VGA_ATC_PLANE_ENABLE, 0x0f);
1736 /* ### vga_wattr(cinfo->regbase, CL_AR33, 0x00); * Pixel Panning: - */
1737 /* Color Select: - */
1738 vga_wattr(cinfo->regbase, VGA_ATC_COLOR_PAGE, 0x00);
1740 WGen(cinfo, VGA_PEL_MSK, 0xff); /* Pixel mask: no mask */
1742 if (cinfo->btype != BT_ALPINE && cinfo->btype != BT_GD5480)
1743 /* polarity (-/-), enable display mem,
1744 * VGA_CRTC_START_HI i/o base = color
1746 WGen(cinfo, VGA_MIS_W, 0xc3);
1748 /* BLT Start/status: Blitter reset */
1749 vga_wgfx(cinfo->regbase, CL_GR31, 0x04);
1750 /* - " - : "end-of-reset" */
1751 vga_wgfx(cinfo->regbase, CL_GR31, 0x00);
1754 WHDR(cinfo, 0); /* Hidden DAC register: - */
1758 static void switch_monitor(struct cirrusfb_info *cinfo, int on)
1760 #ifdef CONFIG_ZORRO /* only works on Zorro boards */
1761 static int IsOn = 0; /* XXX not ok for multiple boards */
1763 if (cinfo->btype == BT_PICASSO4)
1764 return; /* nothing to switch */
1765 if (cinfo->btype == BT_ALPINE)
1766 return; /* nothing to switch */
1767 if (cinfo->btype == BT_GD5480)
1768 return; /* nothing to switch */
1769 if (cinfo->btype == BT_PICASSO) {
1770 if ((on && !IsOn) || (!on && IsOn))
1775 switch (cinfo->btype) {
1777 WSFR(cinfo, cinfo->SFR | 0x21);
1780 WSFR(cinfo, cinfo->SFR | 0x28);
1785 default: /* do nothing */ break;
1788 switch (cinfo->btype) {
1790 WSFR(cinfo, cinfo->SFR & 0xde);
1793 WSFR(cinfo, cinfo->SFR & 0xd7);
1798 default: /* do nothing */
1802 #endif /* CONFIG_ZORRO */
1805 /******************************************/
1806 /* Linux 2.6-style accelerated functions */
1807 /******************************************/
1809 static void cirrusfb_fillrect(struct fb_info *info,
1810 const struct fb_fillrect *region)
1812 struct fb_fillrect modded;
1814 struct cirrusfb_info *cinfo = info->par;
1815 int m = info->var.bits_per_pixel;
1816 u32 color = (info->fix.visual == FB_VISUAL_TRUECOLOR) ?
1817 cinfo->pseudo_palette[region->color] : region->color;
1819 if (info->state != FBINFO_STATE_RUNNING)
1821 if (info->flags & FBINFO_HWACCEL_DISABLED) {
1822 cfb_fillrect(info, region);
1826 vxres = info->var.xres_virtual;
1827 vyres = info->var.yres_virtual;
1829 memcpy(&modded, region, sizeof(struct fb_fillrect));
1831 if (!modded.width || !modded.height ||
1832 modded.dx >= vxres || modded.dy >= vyres)
1835 if (modded.dx + modded.width > vxres)
1836 modded.width = vxres - modded.dx;
1837 if (modded.dy + modded.height > vyres)
1838 modded.height = vyres - modded.dy;
1840 cirrusfb_RectFill(cinfo->regbase,
1841 info->var.bits_per_pixel,
1842 (region->dx * m) / 8, region->dy,
1843 (region->width * m) / 8, region->height,
1845 info->fix.line_length);
1848 static void cirrusfb_copyarea(struct fb_info *info,
1849 const struct fb_copyarea *area)
1851 struct fb_copyarea modded;
1853 struct cirrusfb_info *cinfo = info->par;
1854 int m = info->var.bits_per_pixel;
1856 if (info->state != FBINFO_STATE_RUNNING)
1858 if (info->flags & FBINFO_HWACCEL_DISABLED) {
1859 cfb_copyarea(info, area);
1863 vxres = info->var.xres_virtual;
1864 vyres = info->var.yres_virtual;
1865 memcpy(&modded, area, sizeof(struct fb_copyarea));
1867 if (!modded.width || !modded.height ||
1868 modded.sx >= vxres || modded.sy >= vyres ||
1869 modded.dx >= vxres || modded.dy >= vyres)
1872 if (modded.sx + modded.width > vxres)
1873 modded.width = vxres - modded.sx;
1874 if (modded.dx + modded.width > vxres)
1875 modded.width = vxres - modded.dx;
1876 if (modded.sy + modded.height > vyres)
1877 modded.height = vyres - modded.sy;
1878 if (modded.dy + modded.height > vyres)
1879 modded.height = vyres - modded.dy;
1881 cirrusfb_BitBLT(cinfo->regbase, info->var.bits_per_pixel,
1882 (area->sx * m) / 8, area->sy,
1883 (area->dx * m) / 8, area->dy,
1884 (area->width * m) / 8, area->height,
1885 info->fix.line_length);
1889 static void cirrusfb_imageblit(struct fb_info *info,
1890 const struct fb_image *image)
1892 struct cirrusfb_info *cinfo = info->par;
1894 cirrusfb_WaitBLT(cinfo->regbase);
1895 cfb_imageblit(info, image);
1898 #ifdef CONFIG_PPC_PREP
1899 #define PREP_VIDEO_BASE ((volatile unsigned long) 0xC0000000)
1900 #define PREP_IO_BASE ((volatile unsigned char *) 0x80000000)
1901 static void get_prep_addrs(unsigned long *display, unsigned long *registers)
1903 *display = PREP_VIDEO_BASE;
1904 *registers = (unsigned long) PREP_IO_BASE;
1907 #endif /* CONFIG_PPC_PREP */
1910 static int release_io_ports;
1912 /* Pulled the logic from XFree86 Cirrus driver to get the memory size,
1913 * based on the DRAM bandwidth bit and DRAM bank switching bit. This
1914 * works with 1MB, 2MB and 4MB configurations (which the Motorola boards
1916 static unsigned int __devinit cirrusfb_get_memsize(struct fb_info *info,
1917 u8 __iomem *regbase)
1922 SRF = vga_rseq(regbase, CL_SEQRF);
1923 switch ((SRF & 0x18)) {
1930 /* 64-bit DRAM data bus width; assume 2MB. Also indicates 2MB memory
1937 dev_warn(info->device, "CLgenfb: Unknown memory size!\n");
1941 /* If DRAM bank switching is enabled, there must be twice as much
1942 * memory installed. (4MB on the 5434)
1946 /* TODO: Handling of GD5446/5480 (see XF86 sources ...) */
1950 static void get_pci_addrs(const struct pci_dev *pdev,
1951 unsigned long *display, unsigned long *registers)
1953 assert(pdev != NULL);
1954 assert(display != NULL);
1955 assert(registers != NULL);
1960 /* This is a best-guess for now */
1962 if (pci_resource_flags(pdev, 0) & IORESOURCE_IO) {
1963 *display = pci_resource_start(pdev, 1);
1964 *registers = pci_resource_start(pdev, 0);
1966 *display = pci_resource_start(pdev, 0);
1967 *registers = pci_resource_start(pdev, 1);
1970 assert(*display != 0);
1973 static void cirrusfb_pci_unmap(struct fb_info *info)
1975 struct pci_dev *pdev = to_pci_dev(info->device);
1977 iounmap(info->screen_base);
1978 #if 0 /* if system didn't claim this region, we would... */
1979 release_mem_region(0xA0000, 65535);
1981 if (release_io_ports)
1982 release_region(0x3C0, 32);
1983 pci_release_regions(pdev);
1985 #endif /* CONFIG_PCI */
1988 static void cirrusfb_zorro_unmap(struct fb_info *info)
1990 struct cirrusfb_info *cinfo = info->par;
1991 struct zorro_dev *zdev = to_zorro_dev(info->device);
1993 zorro_release_device(zdev);
1995 if (cinfo->btype == BT_PICASSO4) {
1996 cinfo->regbase -= 0x600000;
1997 iounmap((void *)cinfo->regbase);
1998 iounmap(info->screen_base);
2000 if (zorro_resource_start(zdev) > 0x01000000)
2001 iounmap(info->screen_base);
2004 #endif /* CONFIG_ZORRO */
2006 static int __devinit cirrusfb_set_fbinfo(struct fb_info *info)
2008 struct cirrusfb_info *cinfo = info->par;
2009 struct fb_var_screeninfo *var = &info->var;
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_COPYAREA;
2018 info->flags |= FBINFO_HWACCEL_DISABLED;
2019 info->fbops = &cirrusfb_ops;
2020 if (cinfo->btype == BT_GD5480) {
2021 if (var->bits_per_pixel == 16)
2022 info->screen_base += 1 * MB_;
2023 if (var->bits_per_pixel == 32)
2024 info->screen_base += 2 * MB_;
2027 /* Fill fix common fields */
2028 strlcpy(info->fix.id, cirrusfb_board_info[cinfo->btype].name,
2029 sizeof(info->fix.id));
2031 /* monochrome: only 1 memory plane */
2032 /* 8 bit and above: Use whole memory area */
2033 info->fix.smem_len = info->screen_size;
2034 if (var->bits_per_pixel == 1)
2035 info->fix.smem_len /= 4;
2036 info->fix.type_aux = 0;
2037 info->fix.xpanstep = 1;
2038 info->fix.ypanstep = 1;
2039 info->fix.ywrapstep = 0;
2041 /* FIXME: map region at 0xB8000 if available, fill in here */
2042 info->fix.mmio_len = 0;
2043 info->fix.accel = FB_ACCEL_NONE;
2045 fb_alloc_cmap(&info->cmap, 256, 0);
2050 static int __devinit cirrusfb_register(struct fb_info *info)
2052 struct cirrusfb_info *cinfo = info->par;
2054 enum cirrus_board btype;
2056 btype = cinfo->btype;
2059 assert(btype != BT_NONE);
2061 /* set all the vital stuff */
2062 cirrusfb_set_fbinfo(info);
2064 dev_dbg(info->device, "(RAM start set to: 0x%p)\n", info->screen_base);
2066 err = fb_find_mode(&info->var, info, mode_option, NULL, 0, NULL, 8);
2068 dev_dbg(info->device, "wrong initial video mode\n");
2070 goto err_dealloc_cmap;
2073 info->var.activate = FB_ACTIVATE_NOW;
2075 err = cirrusfb_decode_var(&info->var, &cinfo->currentmode, info);
2077 /* should never happen */
2078 dev_dbg(info->device,
2079 "choking on default var... umm, no good.\n");
2080 goto err_dealloc_cmap;
2083 err = register_framebuffer(info);
2085 dev_err(info->device,
2086 "could not register fb device; err = %d!\n", err);
2087 goto err_dealloc_cmap;
2093 fb_dealloc_cmap(&info->cmap);
2095 framebuffer_release(info);
2099 static void __devexit cirrusfb_cleanup(struct fb_info *info)
2101 struct cirrusfb_info *cinfo = info->par;
2103 switch_monitor(cinfo, 0);
2104 unregister_framebuffer(info);
2105 fb_dealloc_cmap(&info->cmap);
2106 dev_dbg(info->device, "Framebuffer unregistered\n");
2108 framebuffer_release(info);
2112 static int __devinit cirrusfb_pci_register(struct pci_dev *pdev,
2113 const struct pci_device_id *ent)
2115 struct cirrusfb_info *cinfo;
2116 struct fb_info *info;
2117 enum cirrus_board btype;
2118 unsigned long board_addr, board_size;
2121 ret = pci_enable_device(pdev);
2123 printk(KERN_ERR "cirrusfb: Cannot enable PCI device\n");
2127 info = framebuffer_alloc(sizeof(struct cirrusfb_info), &pdev->dev);
2129 printk(KERN_ERR "cirrusfb: could not allocate memory\n");
2135 cinfo->btype = btype = (enum cirrus_board) ent->driver_data;
2137 dev_dbg(info->device,
2138 " Found PCI device, base address 0 is 0x%Lx, btype set to %d\n",
2139 (unsigned long long)pdev->resource[0].start, btype);
2140 dev_dbg(info->device, " base address 1 is 0x%Lx\n",
2141 (unsigned long long)pdev->resource[1].start);
2144 pci_write_config_dword(pdev, PCI_BASE_ADDRESS_0, 0x00000000);
2145 #ifdef CONFIG_PPC_PREP
2146 get_prep_addrs(&board_addr, &info->fix.mmio_start);
2148 /* PReP dies if we ioremap the IO registers, but it works w/out... */
2149 cinfo->regbase = (char __iomem *) info->fix.mmio_start;
2151 dev_dbg(info->device,
2152 "Attempt to get PCI info for Cirrus Graphics Card\n");
2153 get_pci_addrs(pdev, &board_addr, &info->fix.mmio_start);
2154 /* FIXME: this forces VGA. alternatives? */
2155 cinfo->regbase = NULL;
2158 dev_dbg(info->device, "Board address: 0x%lx, register address: 0x%lx\n",
2159 board_addr, info->fix.mmio_start);
2161 board_size = (btype == BT_GD5480) ?
2162 32 * MB_ : cirrusfb_get_memsize(info, cinfo->regbase);
2164 ret = pci_request_regions(pdev, "cirrusfb");
2166 dev_err(info->device, "cannot reserve region 0x%lx, abort\n",
2168 goto err_release_fb;
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",
2175 goto err_release_regions;
2178 if (request_region(0x3C0, 32, "cirrusfb"))
2179 release_io_ports = 1;
2181 info->screen_base = ioremap(board_addr, board_size);
2182 if (!info->screen_base) {
2184 goto err_release_legacy;
2187 info->fix.smem_start = board_addr;
2188 info->screen_size = board_size;
2189 cinfo->unmap = cirrusfb_pci_unmap;
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);
2196 ret = cirrusfb_register(info);
2198 iounmap(info->screen_base);
2202 if (release_io_ports)
2203 release_region(0x3C0, 32);
2205 release_mem_region(0xA0000, 65535);
2206 err_release_regions:
2208 pci_release_regions(pdev);
2210 framebuffer_release(info);
2216 static void __devexit cirrusfb_pci_unregister(struct pci_dev *pdev)
2218 struct fb_info *info = pci_get_drvdata(pdev);
2220 cirrusfb_cleanup(info);
2223 static struct pci_driver cirrusfb_pci_driver = {
2225 .id_table = cirrusfb_pci_table,
2226 .probe = cirrusfb_pci_register,
2227 .remove = __devexit_p(cirrusfb_pci_unregister),
2230 .suspend = cirrusfb_pci_suspend,
2231 .resume = cirrusfb_pci_resume,
2235 #endif /* CONFIG_PCI */
2238 static int __devinit cirrusfb_zorro_register(struct zorro_dev *z,
2239 const struct zorro_device_id *ent)
2241 struct cirrusfb_info *cinfo;
2242 struct fb_info *info;
2243 enum cirrus_board btype;
2244 struct zorro_dev *z2 = NULL;
2245 unsigned long board_addr, board_size, size;
2248 btype = ent->driver_data;
2249 if (cirrusfb_zorro_table2[btype].id2)
2250 z2 = zorro_find_device(cirrusfb_zorro_table2[btype].id2, NULL);
2251 size = cirrusfb_zorro_table2[btype].size;
2253 info = framebuffer_alloc(sizeof(struct cirrusfb_info), &z->dev);
2255 printk(KERN_ERR "cirrusfb: could not allocate memory\n");
2260 dev_info(info->device, "%s board detected\n",
2261 cirrusfb_board_info[btype].name);
2264 cinfo->btype = btype;
2267 assert(btype != BT_NONE);
2269 board_addr = zorro_resource_start(z);
2270 board_size = zorro_resource_len(z);
2271 info->screen_size = size;
2273 if (!zorro_request_device(z, "cirrusfb")) {
2274 dev_err(info->device, "cannot reserve region 0x%lx, abort\n",
2277 goto err_release_fb;
2282 if (btype == BT_PICASSO4) {
2283 dev_info(info->device, " REG at $%lx\n", board_addr + 0x600000);
2285 /* To be precise, for the P4 this is not the */
2286 /* begin of the board, but the begin of RAM. */
2287 /* for P4, map in its address space in 2 chunks (### TEST! ) */
2288 /* (note the ugly hardcoded 16M number) */
2289 cinfo->regbase = ioremap(board_addr, 16777216);
2290 if (!cinfo->regbase)
2291 goto err_release_region;
2293 dev_dbg(info->device, "Virtual address for board set to: $%p\n",
2295 cinfo->regbase += 0x600000;
2296 info->fix.mmio_start = board_addr + 0x600000;
2298 info->fix.smem_start = board_addr + 16777216;
2299 info->screen_base = ioremap(info->fix.smem_start, 16777216);
2300 if (!info->screen_base)
2301 goto err_unmap_regbase;
2303 dev_info(info->device, " REG at $%lx\n",
2304 (unsigned long) z2->resource.start);
2306 info->fix.smem_start = board_addr;
2307 if (board_addr > 0x01000000)
2308 info->screen_base = ioremap(board_addr, board_size);
2310 info->screen_base = (caddr_t) ZTWO_VADDR(board_addr);
2311 if (!info->screen_base)
2312 goto err_release_region;
2314 /* set address for REG area of board */
2315 cinfo->regbase = (caddr_t) ZTWO_VADDR(z2->resource.start);
2316 info->fix.mmio_start = z2->resource.start;
2318 dev_dbg(info->device, "Virtual address for board set to: $%p\n",
2321 cinfo->unmap = cirrusfb_zorro_unmap;
2323 dev_info(info->device,
2324 "Cirrus Logic chipset on Zorro bus, RAM (%lu MB) at $%lx\n",
2325 board_size / MB_, board_addr);
2327 zorro_set_drvdata(z, info);
2329 ret = cirrusfb_register(info);
2331 if (btype == BT_PICASSO4) {
2332 iounmap(info->screen_base);
2333 iounmap(cinfo->regbase - 0x600000);
2334 } else if (board_addr > 0x01000000)
2335 iounmap(info->screen_base);
2340 /* Parental advisory: explicit hack */
2341 iounmap(cinfo->regbase - 0x600000);
2343 release_region(board_addr, board_size);
2345 framebuffer_release(info);
2350 void __devexit cirrusfb_zorro_unregister(struct zorro_dev *z)
2352 struct fb_info *info = zorro_get_drvdata(z);
2354 cirrusfb_cleanup(info);
2357 static struct zorro_driver cirrusfb_zorro_driver = {
2359 .id_table = cirrusfb_zorro_table,
2360 .probe = cirrusfb_zorro_register,
2361 .remove = __devexit_p(cirrusfb_zorro_unregister),
2363 #endif /* CONFIG_ZORRO */
2365 static int __init cirrusfb_init(void)
2370 char *option = NULL;
2372 if (fb_get_options("cirrusfb", &option))
2374 cirrusfb_setup(option);
2378 error |= zorro_register_driver(&cirrusfb_zorro_driver);
2381 error |= pci_register_driver(&cirrusfb_pci_driver);
2387 static int __init cirrusfb_setup(char *options)
2391 if (!options || !*options)
2394 while ((this_opt = strsep(&options, ",")) != NULL) {
2398 if (!strcmp(this_opt, "noaccel"))
2400 else if (!strncmp(this_opt, "mode:", 5))
2401 mode_option = this_opt + 5;
2403 mode_option = this_opt;
2413 MODULE_AUTHOR("Copyright 1999,2000 Jeff Garzik <jgarzik@pobox.com>");
2414 MODULE_DESCRIPTION("Accelerated FBDev driver for Cirrus Logic chips");
2415 MODULE_LICENSE("GPL");
2417 static void __exit cirrusfb_exit(void)
2420 pci_unregister_driver(&cirrusfb_pci_driver);
2423 zorro_unregister_driver(&cirrusfb_zorro_driver);
2427 module_init(cirrusfb_init);
2429 module_param(mode_option, charp, 0);
2430 MODULE_PARM_DESC(mode_option, "Initial video mode e.g. '648x480-8@60'");
2431 module_param(noaccel, bool, 0);
2432 MODULE_PARM_DESC(noaccel, "Disable acceleration");
2435 module_exit(cirrusfb_exit);
2438 /**********************************************************************/
2439 /* about the following functions - I have used the same names for the */
2440 /* functions as Markus Wild did in his Retina driver for NetBSD as */
2441 /* they just made sense for this purpose. Apart from that, I wrote */
2442 /* these functions myself. */
2443 /**********************************************************************/
2445 /*** WGen() - write into one of the external/general registers ***/
2446 static void WGen(const struct cirrusfb_info *cinfo,
2447 int regnum, unsigned char val)
2449 unsigned long regofs = 0;
2451 if (cinfo->btype == BT_PICASSO) {
2452 /* Picasso II specific hack */
2453 /* if (regnum == VGA_PEL_IR || regnum == VGA_PEL_D ||
2454 regnum == CL_VSSM2) */
2455 if (regnum == VGA_PEL_IR || regnum == VGA_PEL_D)
2459 vga_w(cinfo->regbase, regofs + regnum, val);
2462 /*** RGen() - read out one of the external/general registers ***/
2463 static unsigned char RGen(const struct cirrusfb_info *cinfo, int regnum)
2465 unsigned long regofs = 0;
2467 if (cinfo->btype == BT_PICASSO) {
2468 /* Picasso II specific hack */
2469 /* if (regnum == VGA_PEL_IR || regnum == VGA_PEL_D ||
2470 regnum == CL_VSSM2) */
2471 if (regnum == VGA_PEL_IR || regnum == VGA_PEL_D)
2475 return vga_r(cinfo->regbase, regofs + regnum);
2478 /*** AttrOn() - turn on VideoEnable for Attribute controller ***/
2479 static void AttrOn(const struct cirrusfb_info *cinfo)
2481 assert(cinfo != NULL);
2483 if (vga_rcrt(cinfo->regbase, CL_CRT24) & 0x80) {
2484 /* if we're just in "write value" mode, write back the */
2485 /* same value as before to not modify anything */
2486 vga_w(cinfo->regbase, VGA_ATT_IW,
2487 vga_r(cinfo->regbase, VGA_ATT_R));
2489 /* turn on video bit */
2490 /* vga_w(cinfo->regbase, VGA_ATT_IW, 0x20); */
2491 vga_w(cinfo->regbase, VGA_ATT_IW, 0x33);
2493 /* dummy write on Reg0 to be on "write index" mode next time */
2494 vga_w(cinfo->regbase, VGA_ATT_IW, 0x00);
2497 /*** WHDR() - write into the Hidden DAC register ***/
2498 /* as the HDR is the only extension register that requires special treatment
2499 * (the other extension registers are accessible just like the "ordinary"
2500 * registers of their functional group) here is a specialized routine for
2503 static void WHDR(const struct cirrusfb_info *cinfo, unsigned char val)
2505 unsigned char dummy;
2507 if (cinfo->btype == BT_PICASSO) {
2508 /* Klaus' hint for correct access to HDR on some boards */
2509 /* first write 0 to pixel mask (3c6) */
2510 WGen(cinfo, VGA_PEL_MSK, 0x00);
2512 /* next read dummy from pixel address (3c8) */
2513 dummy = RGen(cinfo, VGA_PEL_IW);
2516 /* now do the usual stuff to access the HDR */
2518 dummy = RGen(cinfo, VGA_PEL_MSK);
2520 dummy = RGen(cinfo, VGA_PEL_MSK);
2522 dummy = RGen(cinfo, VGA_PEL_MSK);
2524 dummy = RGen(cinfo, VGA_PEL_MSK);
2527 WGen(cinfo, VGA_PEL_MSK, val);
2530 if (cinfo->btype == BT_PICASSO) {
2531 /* now first reset HDR access counter */
2532 dummy = RGen(cinfo, VGA_PEL_IW);
2535 /* and at the end, restore the mask value */
2536 /* ## is this mask always 0xff? */
2537 WGen(cinfo, VGA_PEL_MSK, 0xff);
2542 /*** WSFR() - write to the "special function register" (SFR) ***/
2543 static void WSFR(struct cirrusfb_info *cinfo, unsigned char val)
2546 assert(cinfo->regbase != NULL);
2548 z_writeb(val, cinfo->regbase + 0x8000);
2552 /* The Picasso has a second register for switching the monitor bit */
2553 static void WSFR2(struct cirrusfb_info *cinfo, unsigned char val)
2556 /* writing an arbitrary value to this one causes the monitor switcher */
2557 /* to flip to Amiga display */
2558 assert(cinfo->regbase != NULL);
2560 z_writeb(val, cinfo->regbase + 0x9000);
2564 /*** WClut - set CLUT entry (range: 0..63) ***/
2565 static void WClut(struct cirrusfb_info *cinfo, unsigned char regnum, unsigned char red,
2566 unsigned char green, unsigned char blue)
2568 unsigned int data = VGA_PEL_D;
2570 /* address write mode register is not translated.. */
2571 vga_w(cinfo->regbase, VGA_PEL_IW, regnum);
2573 if (cinfo->btype == BT_PICASSO || cinfo->btype == BT_PICASSO4 ||
2574 cinfo->btype == BT_ALPINE || cinfo->btype == BT_GD5480) {
2575 /* but DAC data register IS, at least for Picasso II */
2576 if (cinfo->btype == BT_PICASSO)
2578 vga_w(cinfo->regbase, data, red);
2579 vga_w(cinfo->regbase, data, green);
2580 vga_w(cinfo->regbase, data, blue);
2582 vga_w(cinfo->regbase, data, blue);
2583 vga_w(cinfo->regbase, data, green);
2584 vga_w(cinfo->regbase, data, red);
2589 /*** RClut - read CLUT entry (range 0..63) ***/
2590 static void RClut(struct cirrusfb_info *cinfo, unsigned char regnum, unsigned char *red,
2591 unsigned char *green, unsigned char *blue)
2593 unsigned int data = VGA_PEL_D;
2595 vga_w(cinfo->regbase, VGA_PEL_IR, regnum);
2597 if (cinfo->btype == BT_PICASSO || cinfo->btype == BT_PICASSO4 ||
2598 cinfo->btype == BT_ALPINE || cinfo->btype == BT_GD5480) {
2599 if (cinfo->btype == BT_PICASSO)
2601 *red = vga_r(cinfo->regbase, data);
2602 *green = vga_r(cinfo->regbase, data);
2603 *blue = vga_r(cinfo->regbase, data);
2605 *blue = vga_r(cinfo->regbase, data);
2606 *green = vga_r(cinfo->regbase, data);
2607 *red = vga_r(cinfo->regbase, data);
2612 /*******************************************************************
2615 Wait for the BitBLT engine to complete a possible earlier job
2616 *********************************************************************/
2618 /* FIXME: use interrupts instead */
2619 static void cirrusfb_WaitBLT(u8 __iomem *regbase)
2621 /* now busy-wait until we're done */
2622 while (vga_rgfx(regbase, CL_GR31) & 0x08)
2626 /*******************************************************************
2629 perform accelerated "scrolling"
2630 ********************************************************************/
2632 static void cirrusfb_BitBLT(u8 __iomem *regbase, int bits_per_pixel,
2633 u_short curx, u_short cury,
2634 u_short destx, u_short desty,
2635 u_short width, u_short height,
2636 u_short line_length)
2638 u_short nwidth, nheight;
2643 nheight = height - 1;
2646 /* if source adr < dest addr, do the Blt backwards */
2647 if (cury <= desty) {
2648 if (cury == desty) {
2649 /* if src and dest are on the same line, check x */
2656 /* standard case: forward blitting */
2657 nsrc = (cury * line_length) + curx;
2658 ndest = (desty * line_length) + destx;
2660 /* this means start addresses are at the end,
2661 * counting backwards
2663 nsrc = cury * line_length + curx +
2664 nheight * line_length + nwidth;
2665 ndest = desty * line_length + destx +
2666 nheight * line_length + nwidth;
2670 run-down of registers to be programmed:
2678 VGA_GFX_SR_VALUE / VGA_GFX_SR_ENABLE: "fill color"
2682 cirrusfb_WaitBLT(regbase);
2684 /* pitch: set to line_length */
2685 /* dest pitch low */
2686 vga_wgfx(regbase, CL_GR24, line_length & 0xff);
2688 vga_wgfx(regbase, CL_GR25, line_length >> 8);
2689 /* source pitch low */
2690 vga_wgfx(regbase, CL_GR26, line_length & 0xff);
2691 /* source pitch hi */
2692 vga_wgfx(regbase, CL_GR27, line_length >> 8);
2694 /* BLT width: actual number of pixels - 1 */
2696 vga_wgfx(regbase, CL_GR20, nwidth & 0xff);
2698 vga_wgfx(regbase, CL_GR21, nwidth >> 8);
2700 /* BLT height: actual number of lines -1 */
2701 /* BLT height low */
2702 vga_wgfx(regbase, CL_GR22, nheight & 0xff);
2704 vga_wgfx(regbase, CL_GR23, nheight >> 8);
2706 /* BLT destination */
2708 vga_wgfx(regbase, CL_GR28, (u_char) (ndest & 0xff));
2710 vga_wgfx(regbase, CL_GR29, (u_char) (ndest >> 8));
2712 vga_wgfx(regbase, CL_GR2A, (u_char) (ndest >> 16));
2716 vga_wgfx(regbase, CL_GR2C, (u_char) (nsrc & 0xff));
2718 vga_wgfx(regbase, CL_GR2D, (u_char) (nsrc >> 8));
2720 vga_wgfx(regbase, CL_GR2E, (u_char) (nsrc >> 16));
2723 vga_wgfx(regbase, CL_GR30, bltmode); /* BLT mode */
2725 /* BLT ROP: SrcCopy */
2726 vga_wgfx(regbase, CL_GR32, 0x0d); /* BLT ROP */
2728 /* and finally: GO! */
2729 vga_wgfx(regbase, CL_GR31, 0x02); /* BLT Start/status */
2732 /*******************************************************************
2735 perform accelerated rectangle fill
2736 ********************************************************************/
2738 static void cirrusfb_RectFill(u8 __iomem *regbase, int bits_per_pixel,
2739 u_short x, u_short y, u_short width, u_short height,
2740 u_char color, u_short line_length)
2742 u_short nwidth, nheight;
2747 nheight = height - 1;
2749 ndest = (y * line_length) + x;
2751 cirrusfb_WaitBLT(regbase);
2753 /* pitch: set to line_length */
2754 vga_wgfx(regbase, CL_GR24, line_length & 0xff); /* dest pitch low */
2755 vga_wgfx(regbase, CL_GR25, line_length >> 8); /* dest pitch hi */
2756 vga_wgfx(regbase, CL_GR26, line_length & 0xff); /* source pitch low */
2757 vga_wgfx(regbase, CL_GR27, line_length >> 8); /* source pitch hi */
2759 /* BLT width: actual number of pixels - 1 */
2760 vga_wgfx(regbase, CL_GR20, nwidth & 0xff); /* BLT width low */
2761 vga_wgfx(regbase, CL_GR21, nwidth >> 8); /* BLT width hi */
2763 /* BLT height: actual number of lines -1 */
2764 vga_wgfx(regbase, CL_GR22, nheight & 0xff); /* BLT height low */
2765 vga_wgfx(regbase, CL_GR23, nheight >> 8); /* BLT width hi */
2767 /* BLT destination */
2769 vga_wgfx(regbase, CL_GR28, (u_char) (ndest & 0xff));
2771 vga_wgfx(regbase, CL_GR29, (u_char) (ndest >> 8));
2773 vga_wgfx(regbase, CL_GR2A, (u_char) (ndest >> 16));
2775 /* BLT source: set to 0 (is a dummy here anyway) */
2776 vga_wgfx(regbase, CL_GR2C, 0x00); /* BLT src low */
2777 vga_wgfx(regbase, CL_GR2D, 0x00); /* BLT src mid */
2778 vga_wgfx(regbase, CL_GR2E, 0x00); /* BLT src hi */
2780 /* This is a ColorExpand Blt, using the */
2781 /* same color for foreground and background */
2782 vga_wgfx(regbase, VGA_GFX_SR_VALUE, color); /* foreground color */
2783 vga_wgfx(regbase, VGA_GFX_SR_ENABLE, color); /* background color */
2786 if (bits_per_pixel == 16) {
2787 vga_wgfx(regbase, CL_GR10, color); /* foreground color */
2788 vga_wgfx(regbase, CL_GR11, color); /* background color */
2791 } else if (bits_per_pixel == 32) {
2792 vga_wgfx(regbase, CL_GR10, color); /* foreground color */
2793 vga_wgfx(regbase, CL_GR11, color); /* background color */
2794 vga_wgfx(regbase, CL_GR12, color); /* foreground color */
2795 vga_wgfx(regbase, CL_GR13, color); /* background color */
2796 vga_wgfx(regbase, CL_GR14, 0); /* foreground color */
2797 vga_wgfx(regbase, CL_GR15, 0); /* background color */
2801 /* BLT mode: color expand, Enable 8x8 copy (faster?) */
2802 vga_wgfx(regbase, CL_GR30, op); /* BLT mode */
2804 /* BLT ROP: SrcCopy */
2805 vga_wgfx(regbase, CL_GR32, 0x0d); /* BLT ROP */
2807 /* and finally: GO! */
2808 vga_wgfx(regbase, CL_GR31, 0x02); /* BLT Start/status */
2811 /**************************************************************************
2812 * bestclock() - determine closest possible clock lower(?) than the
2813 * desired pixel clock
2814 **************************************************************************/
2815 static void bestclock(long freq, int *nom, int *den, int *div)
2820 assert(nom != NULL);
2821 assert(den != NULL);
2822 assert(div != NULL);
2833 for (n = 32; n < 128; n++) {
2836 d = (14318 * n) / freq;
2837 if ((d >= 7) && (d <= 63)) {
2844 h = ((14318 * n) / temp) >> s;
2845 h = h > freq ? h - freq : freq - h;
2854 if ((d >= 7) && (d <= 63)) {
2859 h = ((14318 * n) / d) >> s;
2860 h = h > freq ? h - freq : freq - h;
2871 /* -------------------------------------------------------------------------
2873 * debugging functions
2875 * -------------------------------------------------------------------------
2878 #ifdef CIRRUSFB_DEBUG
2881 * cirrusfb_dbg_print_regs
2882 * @base: If using newmmio, the newmmio base address, otherwise %NULL
2883 * @reg_class: type of registers to read: %CRT, or %SEQ
2886 * Dumps the given list of VGA CRTC registers. If @base is %NULL,
2887 * old-style I/O ports are queried for information, otherwise MMIO is
2888 * used at the given @base address to query the information.
2891 static void cirrusfb_dbg_print_regs(struct fb_info *info,
2893 enum cirrusfb_dbg_reg_class reg_class, ...)
2896 unsigned char val = 0;
2900 va_start(list, reg_class);
2902 name = va_arg(list, char *);
2903 while (name != NULL) {
2904 reg = va_arg(list, int);
2906 switch (reg_class) {
2908 val = vga_rcrt(regbase, (unsigned char) reg);
2911 val = vga_rseq(regbase, (unsigned char) reg);
2914 /* should never occur */
2919 dev_dbg(info->device, "%8s = 0x%02X\n", name, val);
2921 name = va_arg(list, char *);
2928 * cirrusfb_dbg_reg_dump
2929 * @base: If using newmmio, the newmmio base address, otherwise %NULL
2932 * Dumps a list of interesting VGA and CIRRUSFB registers. If @base is %NULL,
2933 * old-style I/O ports are queried for information, otherwise MMIO is
2934 * used at the given @base address to query the information.
2937 static void cirrusfb_dbg_reg_dump(struct fb_info *info, caddr_t regbase)
2939 dev_dbg(info->device, "VGA CRTC register dump:\n");
2941 cirrusfb_dbg_print_regs(info, regbase, CRT,
2991 dev_dbg(info->device, "\n");
2993 dev_dbg(info->device, "VGA SEQ register dump:\n");
2995 cirrusfb_dbg_print_regs(info, regbase, SEQ,
3024 dev_dbg(info->device, "\n");
3027 #endif /* CIRRUSFB_DEBUG */