2 * linux/drivers/video/tgafb.c -- DEC 21030 TGA frame buffer device
4 * Copyright (C) 1995 Jay Estabrook
5 * Copyright (C) 1997 Geert Uytterhoeven
6 * Copyright (C) 1999,2000 Martin Lucina, Tom Zerucha
7 * Copyright (C) 2002 Richard Henderson
9 * This file is subject to the terms and conditions of the GNU General Public
10 * License. See the file COPYING in the main directory of this archive for
14 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/sched.h>
17 #include <linux/errno.h>
18 #include <linux/string.h>
20 #include <linux/slab.h>
21 #include <linux/delay.h>
22 #include <linux/init.h>
24 #include <linux/pci.h>
25 #include <linux/selection.h>
26 #include <linux/bitrev.h>
28 #include <video/tgafb.h>
34 static int tgafb_check_var(struct fb_var_screeninfo *, struct fb_info *);
35 static int tgafb_set_par(struct fb_info *);
36 static void tgafb_set_pll(struct tga_par *, int);
37 static int tgafb_setcolreg(unsigned, unsigned, unsigned, unsigned,
38 unsigned, struct fb_info *);
39 static int tgafb_blank(int, struct fb_info *);
40 static void tgafb_init_fix(struct fb_info *);
42 static void tgafb_imageblit(struct fb_info *, const struct fb_image *);
43 static void tgafb_fillrect(struct fb_info *, const struct fb_fillrect *);
44 static void tgafb_copyarea(struct fb_info *, const struct fb_copyarea *);
46 static int tgafb_pci_register(struct pci_dev *, const struct pci_device_id *);
47 static void tgafb_pci_unregister(struct pci_dev *);
49 static const char *mode_option = "640x480@60";
53 * Frame buffer operations
56 static struct fb_ops tgafb_ops = {
58 .fb_check_var = tgafb_check_var,
59 .fb_set_par = tgafb_set_par,
60 .fb_setcolreg = tgafb_setcolreg,
61 .fb_blank = tgafb_blank,
62 .fb_fillrect = tgafb_fillrect,
63 .fb_copyarea = tgafb_copyarea,
64 .fb_imageblit = tgafb_imageblit,
69 * PCI registration operations
72 static struct pci_device_id const tgafb_pci_table[] = {
73 { PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_DEC_TGA, PCI_ANY_ID, PCI_ANY_ID,
77 static struct pci_driver tgafb_driver = {
79 .id_table = tgafb_pci_table,
80 .probe = tgafb_pci_register,
81 .remove = __devexit_p(tgafb_pci_unregister),
86 * tgafb_check_var - Optional function. Validates a var passed in.
87 * @var: frame buffer variable screen structure
88 * @info: frame buffer structure that represents a single frame buffer
91 tgafb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
93 struct tga_par *par = (struct tga_par *)info->par;
95 if (par->tga_type == TGA_TYPE_8PLANE) {
96 if (var->bits_per_pixel != 8)
99 if (var->bits_per_pixel != 32)
103 if (var->xres_virtual != var->xres || var->yres_virtual != var->yres)
107 if (1000000000 / var->pixclock > TGA_PLL_MAX_FREQ)
109 if ((var->vmode & FB_VMODE_MASK) != FB_VMODE_NONINTERLACED)
112 /* Some of the acceleration routines assume the line width is
113 a multiple of 64 bytes. */
114 if (var->xres * (par->tga_type == TGA_TYPE_8PLANE ? 1 : 4) % 64)
121 * tgafb_set_par - Optional function. Alters the hardware state.
122 * @info: frame buffer structure that represents a single frame buffer
125 tgafb_set_par(struct fb_info *info)
127 static unsigned int const deep_presets[4] = {
133 static unsigned int const rasterop_presets[4] = {
139 static unsigned int const mode_presets[4] = {
145 static unsigned int const base_addr_presets[4] = {
152 struct tga_par *par = (struct tga_par *) info->par;
153 u32 htimings, vtimings, pll_freq;
157 /* Encode video timings. */
158 htimings = (((info->var.xres/4) & TGA_HORIZ_ACT_LSB)
159 | (((info->var.xres/4) & 0x600 << 19) & TGA_HORIZ_ACT_MSB));
160 vtimings = (info->var.yres & TGA_VERT_ACTIVE);
161 htimings |= ((info->var.right_margin/4) << 9) & TGA_HORIZ_FP;
162 vtimings |= (info->var.lower_margin << 11) & TGA_VERT_FP;
163 htimings |= ((info->var.hsync_len/4) << 14) & TGA_HORIZ_SYNC;
164 vtimings |= (info->var.vsync_len << 16) & TGA_VERT_SYNC;
165 htimings |= ((info->var.left_margin/4) << 21) & TGA_HORIZ_BP;
166 vtimings |= (info->var.upper_margin << 22) & TGA_VERT_BP;
168 if (info->var.sync & FB_SYNC_HOR_HIGH_ACT)
169 htimings |= TGA_HORIZ_POLARITY;
170 if (info->var.sync & FB_SYNC_VERT_HIGH_ACT)
171 vtimings |= TGA_VERT_POLARITY;
173 par->htimings = htimings;
174 par->vtimings = vtimings;
176 par->sync_on_green = !!(info->var.sync & FB_SYNC_ON_GREEN);
178 /* Store other useful values in par. */
179 par->xres = info->var.xres;
180 par->yres = info->var.yres;
181 par->pll_freq = pll_freq = 1000000000 / info->var.pixclock;
182 par->bits_per_pixel = info->var.bits_per_pixel;
184 tga_type = par->tga_type;
186 /* First, disable video. */
187 TGA_WRITE_REG(par, TGA_VALID_VIDEO | TGA_VALID_BLANK, TGA_VALID_REG);
189 /* Write the DEEP register. */
190 while (TGA_READ_REG(par, TGA_CMD_STAT_REG) & 1) /* wait for not busy */
193 TGA_WRITE_REG(par, deep_presets[tga_type], TGA_DEEP_REG);
194 while (TGA_READ_REG(par, TGA_CMD_STAT_REG) & 1) /* wait for not busy */
198 /* Write some more registers. */
199 TGA_WRITE_REG(par, rasterop_presets[tga_type], TGA_RASTEROP_REG);
200 TGA_WRITE_REG(par, mode_presets[tga_type], TGA_MODE_REG);
201 TGA_WRITE_REG(par, base_addr_presets[tga_type], TGA_BASE_ADDR_REG);
203 /* Calculate & write the PLL. */
204 tgafb_set_pll(par, pll_freq);
206 /* Write some more registers. */
207 TGA_WRITE_REG(par, 0xffffffff, TGA_PLANEMASK_REG);
208 TGA_WRITE_REG(par, 0xffffffff, TGA_PIXELMASK_REG);
210 /* Init video timing regs. */
211 TGA_WRITE_REG(par, htimings, TGA_HORIZ_REG);
212 TGA_WRITE_REG(par, vtimings, TGA_VERT_REG);
214 /* Initalise RAMDAC. */
215 if (tga_type == TGA_TYPE_8PLANE) {
217 /* Init BT485 RAMDAC registers. */
218 BT485_WRITE(par, 0xa2 | (par->sync_on_green ? 0x8 : 0x0),
220 BT485_WRITE(par, 0x01, BT485_ADDR_PAL_WRITE);
221 BT485_WRITE(par, 0x14, BT485_CMD_3); /* cursor 64x64 */
222 BT485_WRITE(par, 0x40, BT485_CMD_1);
223 BT485_WRITE(par, 0x20, BT485_CMD_2); /* cursor off, for now */
224 BT485_WRITE(par, 0xff, BT485_PIXEL_MASK);
226 /* Fill palette registers. */
227 BT485_WRITE(par, 0x00, BT485_ADDR_PAL_WRITE);
228 TGA_WRITE_REG(par, BT485_DATA_PAL, TGA_RAMDAC_SETUP_REG);
230 for (i = 0; i < 16; i++) {
232 TGA_WRITE_REG(par, default_red[j]|(BT485_DATA_PAL<<8),
234 TGA_WRITE_REG(par, default_grn[j]|(BT485_DATA_PAL<<8),
236 TGA_WRITE_REG(par, default_blu[j]|(BT485_DATA_PAL<<8),
239 for (i = 0; i < 240*3; i += 4) {
240 TGA_WRITE_REG(par, 0x55|(BT485_DATA_PAL<<8),
242 TGA_WRITE_REG(par, 0x00|(BT485_DATA_PAL<<8),
244 TGA_WRITE_REG(par, 0x00|(BT485_DATA_PAL<<8),
246 TGA_WRITE_REG(par, 0x00|(BT485_DATA_PAL<<8),
250 } else { /* 24-plane or 24plusZ */
252 /* Init BT463 registers. */
253 BT463_WRITE(par, BT463_REG_ACC, BT463_CMD_REG_0, 0x40);
254 BT463_WRITE(par, BT463_REG_ACC, BT463_CMD_REG_1, 0x08);
255 BT463_WRITE(par, BT463_REG_ACC, BT463_CMD_REG_2,
256 (par->sync_on_green ? 0x80 : 0x40));
258 BT463_WRITE(par, BT463_REG_ACC, BT463_READ_MASK_0, 0xff);
259 BT463_WRITE(par, BT463_REG_ACC, BT463_READ_MASK_1, 0xff);
260 BT463_WRITE(par, BT463_REG_ACC, BT463_READ_MASK_2, 0xff);
261 BT463_WRITE(par, BT463_REG_ACC, BT463_READ_MASK_3, 0x0f);
263 BT463_WRITE(par, BT463_REG_ACC, BT463_BLINK_MASK_0, 0x00);
264 BT463_WRITE(par, BT463_REG_ACC, BT463_BLINK_MASK_1, 0x00);
265 BT463_WRITE(par, BT463_REG_ACC, BT463_BLINK_MASK_2, 0x00);
266 BT463_WRITE(par, BT463_REG_ACC, BT463_BLINK_MASK_3, 0x00);
268 /* Fill the palette. */
269 BT463_LOAD_ADDR(par, 0x0000);
270 TGA_WRITE_REG(par, BT463_PALETTE<<2, TGA_RAMDAC_REG);
272 for (i = 0; i < 16; i++) {
274 TGA_WRITE_REG(par, default_red[j]|(BT463_PALETTE<<10),
276 TGA_WRITE_REG(par, default_grn[j]|(BT463_PALETTE<<10),
278 TGA_WRITE_REG(par, default_blu[j]|(BT463_PALETTE<<10),
281 for (i = 0; i < 512*3; i += 4) {
282 TGA_WRITE_REG(par, 0x55|(BT463_PALETTE<<10),
284 TGA_WRITE_REG(par, 0x00|(BT463_PALETTE<<10),
286 TGA_WRITE_REG(par, 0x00|(BT463_PALETTE<<10),
288 TGA_WRITE_REG(par, 0x00|(BT463_PALETTE<<10),
292 /* Fill window type table after start of vertical retrace. */
293 while (!(TGA_READ_REG(par, TGA_INTR_STAT_REG) & 0x01))
295 TGA_WRITE_REG(par, 0x01, TGA_INTR_STAT_REG);
297 while (!(TGA_READ_REG(par, TGA_INTR_STAT_REG) & 0x01))
299 TGA_WRITE_REG(par, 0x01, TGA_INTR_STAT_REG);
301 BT463_LOAD_ADDR(par, BT463_WINDOW_TYPE_BASE);
302 TGA_WRITE_REG(par, BT463_REG_ACC<<2, TGA_RAMDAC_SETUP_REG);
304 for (i = 0; i < 16; i++) {
305 TGA_WRITE_REG(par, 0x00|(BT463_REG_ACC<<10),
307 TGA_WRITE_REG(par, 0x01|(BT463_REG_ACC<<10),
309 TGA_WRITE_REG(par, 0x80|(BT463_REG_ACC<<10),
315 /* Finally, enable video scan (and pray for the monitor... :-) */
316 TGA_WRITE_REG(par, TGA_VALID_VIDEO, TGA_VALID_REG);
321 #define DIFFCHECK(X) \
324 int delta = f - (TGA_PLL_BASE_FREQ * (X)) / (r << shift); \
327 if (delta < min_diff) \
328 min_diff = delta, vm = m, va = a, vr = r; \
333 tgafb_set_pll(struct tga_par *par, int f)
335 int n, shift, base, min_diff, target;
336 int r,a,m,vm = 34, va = 1, vr = 30;
338 for (r = 0 ; r < 12 ; r++)
339 TGA_WRITE_REG(par, !r, TGA_CLOCK_REG);
341 if (f > TGA_PLL_MAX_FREQ)
342 f = TGA_PLL_MAX_FREQ;
344 if (f >= TGA_PLL_MAX_FREQ / 2)
346 else if (f >= TGA_PLL_MAX_FREQ / 4)
351 TGA_WRITE_REG(par, shift & 1, TGA_CLOCK_REG);
352 TGA_WRITE_REG(par, shift >> 1, TGA_CLOCK_REG);
354 for (r = 0 ; r < 10 ; r++)
355 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
358 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
359 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
361 else if (f <= 200000) {
362 TGA_WRITE_REG(par, 1, TGA_CLOCK_REG);
363 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
366 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
367 TGA_WRITE_REG(par, 1, TGA_CLOCK_REG);
370 TGA_WRITE_REG(par, 1, TGA_CLOCK_REG);
371 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
372 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
373 TGA_WRITE_REG(par, 1, TGA_CLOCK_REG);
374 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
375 TGA_WRITE_REG(par, 1, TGA_CLOCK_REG);
377 target = (f << shift) / TGA_PLL_BASE_FREQ;
378 min_diff = TGA_PLL_MAX_FREQ;
385 for (n = base < 7 ? 7 : base; n < base + target && n < 449; n++) {
386 m = ((n + 3) / 7) - 1;
388 DIFFCHECK((m + 1) * 7);
390 DIFFCHECK((m + 1) * 7);
401 for (r = 0; r < 8; r++)
402 TGA_WRITE_REG(par, (vm >> r) & 1, TGA_CLOCK_REG);
403 for (r = 0; r < 8 ; r++)
404 TGA_WRITE_REG(par, (va >> r) & 1, TGA_CLOCK_REG);
405 for (r = 0; r < 7 ; r++)
406 TGA_WRITE_REG(par, (vr >> r) & 1, TGA_CLOCK_REG);
407 TGA_WRITE_REG(par, ((vr >> 7) & 1)|2, TGA_CLOCK_REG);
412 * tgafb_setcolreg - Optional function. Sets a color register.
413 * @regno: boolean, 0 copy local, 1 get_user() function
414 * @red: frame buffer colormap structure
415 * @green: The green value which can be up to 16 bits wide
416 * @blue: The blue value which can be up to 16 bits wide.
417 * @transp: If supported the alpha value which can be up to 16 bits wide.
418 * @info: frame buffer info structure
421 tgafb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue,
422 unsigned transp, struct fb_info *info)
424 struct tga_par *par = (struct tga_par *) info->par;
432 if (par->tga_type == TGA_TYPE_8PLANE) {
433 BT485_WRITE(par, regno, BT485_ADDR_PAL_WRITE);
434 TGA_WRITE_REG(par, BT485_DATA_PAL, TGA_RAMDAC_SETUP_REG);
435 TGA_WRITE_REG(par, red|(BT485_DATA_PAL<<8),TGA_RAMDAC_REG);
436 TGA_WRITE_REG(par, green|(BT485_DATA_PAL<<8),TGA_RAMDAC_REG);
437 TGA_WRITE_REG(par, blue|(BT485_DATA_PAL<<8),TGA_RAMDAC_REG);
438 } else if (regno < 16) {
439 u32 value = (red << 16) | (green << 8) | blue;
440 ((u32 *)info->pseudo_palette)[regno] = value;
448 * tgafb_blank - Optional function. Blanks the display.
449 * @blank_mode: the blank mode we want.
450 * @info: frame buffer structure that represents a single frame buffer
453 tgafb_blank(int blank, struct fb_info *info)
455 struct tga_par *par = (struct tga_par *) info->par;
456 u32 vhcr, vvcr, vvvr;
459 local_irq_save(flags);
461 vhcr = TGA_READ_REG(par, TGA_HORIZ_REG);
462 vvcr = TGA_READ_REG(par, TGA_VERT_REG);
463 vvvr = TGA_READ_REG(par, TGA_VALID_REG);
464 vvvr &= ~(TGA_VALID_VIDEO | TGA_VALID_BLANK);
467 case FB_BLANK_UNBLANK: /* Unblanking */
468 if (par->vesa_blanked) {
469 TGA_WRITE_REG(par, vhcr & 0xbfffffff, TGA_HORIZ_REG);
470 TGA_WRITE_REG(par, vvcr & 0xbfffffff, TGA_VERT_REG);
471 par->vesa_blanked = 0;
473 TGA_WRITE_REG(par, vvvr | TGA_VALID_VIDEO, TGA_VALID_REG);
476 case FB_BLANK_NORMAL: /* Normal blanking */
477 TGA_WRITE_REG(par, vvvr | TGA_VALID_VIDEO | TGA_VALID_BLANK,
481 case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
482 TGA_WRITE_REG(par, vvcr | 0x40000000, TGA_VERT_REG);
483 TGA_WRITE_REG(par, vvvr | TGA_VALID_BLANK, TGA_VALID_REG);
484 par->vesa_blanked = 1;
487 case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
488 TGA_WRITE_REG(par, vhcr | 0x40000000, TGA_HORIZ_REG);
489 TGA_WRITE_REG(par, vvvr | TGA_VALID_BLANK, TGA_VALID_REG);
490 par->vesa_blanked = 1;
493 case FB_BLANK_POWERDOWN: /* Poweroff */
494 TGA_WRITE_REG(par, vhcr | 0x40000000, TGA_HORIZ_REG);
495 TGA_WRITE_REG(par, vvcr | 0x40000000, TGA_VERT_REG);
496 TGA_WRITE_REG(par, vvvr | TGA_VALID_BLANK, TGA_VALID_REG);
497 par->vesa_blanked = 1;
501 local_irq_restore(flags);
511 * tgafb_imageblit - REQUIRED function. Can use generic routines if
512 * non acclerated hardware and packed pixel based.
513 * Copies a image from system memory to the screen.
515 * @info: frame buffer structure that represents a single frame buffer
516 * @image: structure defining the image.
519 tgafb_imageblit(struct fb_info *info, const struct fb_image *image)
521 struct tga_par *par = (struct tga_par *) info->par;
522 u32 fgcolor, bgcolor, dx, dy, width, height, vxres, vyres, pixelmask;
523 unsigned long rincr, line_length, shift, pos, is8bpp;
525 const unsigned char *data;
526 void __iomem *regs_base;
527 void __iomem *fb_base;
531 width = image->width;
532 height = image->height;
533 vxres = info->var.xres_virtual;
534 vyres = info->var.yres_virtual;
535 line_length = info->fix.line_length;
536 rincr = (width + 7) / 8;
538 /* Crop the image to the screen. */
539 if (dx > vxres || dy > vyres)
541 if (dx + width > vxres)
543 if (dy + height > vyres)
546 /* For copies that aren't pixel expansion, there's little we
547 can do better than the generic code. */
548 /* ??? There is a DMA write mode; I wonder if that could be
549 made to pull the data from the image buffer... */
550 if (image->depth > 1) {
551 cfb_imageblit(info, image);
555 regs_base = par->tga_regs_base;
556 fb_base = par->tga_fb_base;
557 is8bpp = info->var.bits_per_pixel == 8;
559 /* Expand the color values to fill 32-bits. */
560 /* ??? Would be nice to notice colour changes elsewhere, so
561 that we can do this only when necessary. */
562 fgcolor = image->fg_color;
563 bgcolor = image->bg_color;
565 fgcolor |= fgcolor << 8;
566 fgcolor |= fgcolor << 16;
567 bgcolor |= bgcolor << 8;
568 bgcolor |= bgcolor << 16;
571 fgcolor = ((u32 *)info->pseudo_palette)[fgcolor];
573 bgcolor = ((u32 *)info->pseudo_palette)[bgcolor];
575 __raw_writel(fgcolor, regs_base + TGA_FOREGROUND_REG);
576 __raw_writel(bgcolor, regs_base + TGA_BACKGROUND_REG);
578 /* Acquire proper alignment; set up the PIXELMASK register
579 so that we only write the proper character cell. */
580 pos = dy * line_length;
587 shift = (pos & 7) >> 2;
591 data = (const unsigned char *) image->data;
593 /* Enable opaque stipple mode. */
595 ? TGA_MODE_SBM_8BPP | TGA_MODE_OPAQUE_STIPPLE
596 : TGA_MODE_SBM_24BPP | TGA_MODE_OPAQUE_STIPPLE),
597 regs_base + TGA_MODE_REG);
599 if (width + shift <= 32) {
600 unsigned long bwidth;
602 /* Handle common case of imaging a single character, in
603 a font less than 32 pixels wide. */
605 pixelmask = (1 << width) - 1;
607 __raw_writel(pixelmask, regs_base + TGA_PIXELMASK_REG);
610 bwidth = (width + 7) / 8;
612 for (i = 0; i < height; ++i) {
615 /* The image data is bit big endian; we need
617 for (j = 0; j < bwidth; ++j)
618 mask |= bitrev8(data[j]) << (j * 8);
620 __raw_writel(mask << shift, fb_base + pos);
626 __raw_writel(0xffffffff, regs_base + TGA_PIXELMASK_REG);
627 } else if (shift == 0) {
628 unsigned long pos0 = pos;
629 const unsigned char *data0 = data;
630 unsigned long bincr = (is8bpp ? 8 : 8*4);
631 unsigned long bwidth;
633 /* Handle another common case in which accel_putcs
634 generates a large bitmap, which happens to be aligned.
635 Allow the tail to be misaligned. This case is
636 interesting because we've not got to hold partial
637 bytes across the words being written. */
641 bwidth = (width / 8) & -4;
642 for (i = 0; i < height; ++i) {
643 for (j = 0; j < bwidth; j += 4) {
645 mask |= bitrev8(data[j+0]) << (0 * 8);
646 mask |= bitrev8(data[j+1]) << (1 * 8);
647 mask |= bitrev8(data[j+2]) << (2 * 8);
648 mask |= bitrev8(data[j+3]) << (3 * 8);
649 __raw_writel(mask, fb_base + pos + j*bincr);
656 pixelmask = (1ul << (width & 31)) - 1;
658 __raw_writel(pixelmask, regs_base + TGA_PIXELMASK_REG);
661 pos = pos0 + bwidth*bincr;
662 data = data0 + bwidth;
663 bwidth = ((width & 31) + 7) / 8;
665 for (i = 0; i < height; ++i) {
667 for (j = 0; j < bwidth; ++j)
668 mask |= bitrev8(data[j]) << (j * 8);
669 __raw_writel(mask, fb_base + pos);
674 __raw_writel(0xffffffff, regs_base + TGA_PIXELMASK_REG);
677 unsigned long pos0 = pos;
678 const unsigned char *data0 = data;
679 unsigned long bincr = (is8bpp ? 8 : 8*4);
680 unsigned long bwidth;
682 /* Finally, handle the generic case of misaligned start.
683 Here we split the write into 16-bit spans. This allows
684 us to use only one pixel mask, instead of four as would
685 be required by writing 24-bit spans. */
687 pixelmask = 0xffff << shift;
688 __raw_writel(pixelmask, regs_base + TGA_PIXELMASK_REG);
691 bwidth = (width / 8) & -2;
692 for (i = 0; i < height; ++i) {
693 for (j = 0; j < bwidth; j += 2) {
695 mask |= bitrev8(data[j+0]) << (0 * 8);
696 mask |= bitrev8(data[j+1]) << (1 * 8);
698 __raw_writel(mask, fb_base + pos + j*bincr);
705 pixelmask = ((1ul << (width & 15)) - 1) << shift;
707 __raw_writel(pixelmask, regs_base + TGA_PIXELMASK_REG);
710 pos = pos0 + bwidth*bincr;
711 data = data0 + bwidth;
712 bwidth = (width & 15) > 8;
714 for (i = 0; i < height; ++i) {
715 u32 mask = bitrev8(data[0]);
717 mask |= bitrev8(data[1]) << 8;
719 __raw_writel(mask, fb_base + pos);
725 __raw_writel(0xffffffff, regs_base + TGA_PIXELMASK_REG);
728 /* Disable opaque stipple mode. */
730 ? TGA_MODE_SBM_8BPP | TGA_MODE_SIMPLE
731 : TGA_MODE_SBM_24BPP | TGA_MODE_SIMPLE),
732 regs_base + TGA_MODE_REG);
736 * tgafb_fillrect - REQUIRED function. Can use generic routines if
737 * non acclerated hardware and packed pixel based.
738 * Draws a rectangle on the screen.
740 * @info: frame buffer structure that represents a single frame buffer
741 * @rect: structure defining the rectagle and operation.
744 tgafb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
746 struct tga_par *par = (struct tga_par *) info->par;
747 int is8bpp = info->var.bits_per_pixel == 8;
748 u32 dx, dy, width, height, vxres, vyres, color;
749 unsigned long pos, align, line_length, i, j;
750 void __iomem *regs_base;
751 void __iomem *fb_base;
756 height = rect->height;
757 vxres = info->var.xres_virtual;
758 vyres = info->var.yres_virtual;
759 line_length = info->fix.line_length;
760 regs_base = par->tga_regs_base;
761 fb_base = par->tga_fb_base;
763 /* Crop the rectangle to the screen. */
764 if (dx > vxres || dy > vyres || !width || !height)
766 if (dx + width > vxres)
768 if (dy + height > vyres)
771 pos = dy * line_length + dx * (is8bpp ? 1 : 4);
773 /* ??? We could implement ROP_XOR with opaque fill mode
774 and a RasterOp setting of GXxor, but as far as I can
775 tell, this mode is not actually used in the kernel.
776 Thus I am ignoring it for now. */
777 if (rect->rop != ROP_COPY) {
778 cfb_fillrect(info, rect);
782 /* Expand the color value to fill 8 pixels. */
786 color |= color << 16;
787 __raw_writel(color, regs_base + TGA_BLOCK_COLOR0_REG);
788 __raw_writel(color, regs_base + TGA_BLOCK_COLOR1_REG);
791 color = ((u32 *)info->pseudo_palette)[color];
792 __raw_writel(color, regs_base + TGA_BLOCK_COLOR0_REG);
793 __raw_writel(color, regs_base + TGA_BLOCK_COLOR1_REG);
794 __raw_writel(color, regs_base + TGA_BLOCK_COLOR2_REG);
795 __raw_writel(color, regs_base + TGA_BLOCK_COLOR3_REG);
796 __raw_writel(color, regs_base + TGA_BLOCK_COLOR4_REG);
797 __raw_writel(color, regs_base + TGA_BLOCK_COLOR5_REG);
798 __raw_writel(color, regs_base + TGA_BLOCK_COLOR6_REG);
799 __raw_writel(color, regs_base + TGA_BLOCK_COLOR7_REG);
802 /* The DATA register holds the fill mask for block fill mode.
803 Since we're not stippling, this is all ones. */
804 __raw_writel(0xffffffff, regs_base + TGA_DATA_REG);
806 /* Enable block fill mode. */
808 ? TGA_MODE_SBM_8BPP | TGA_MODE_BLOCK_FILL
809 : TGA_MODE_SBM_24BPP | TGA_MODE_BLOCK_FILL),
810 regs_base + TGA_MODE_REG);
813 /* We can fill 2k pixels per operation. Notice blocks that fit
814 the width of the screen so that we can take advantage of this
815 and fill more than one line per write. */
816 if (width == line_length)
817 width *= height, height = 1;
819 /* The write into the frame buffer must be aligned to 4 bytes,
820 but we are allowed to encode the offset within the word in
821 the data word written. */
822 align = (pos & 3) << 16;
828 data = (width - 1) | align;
830 for (i = 0; i < height; ++i) {
831 __raw_writel(data, fb_base + pos);
835 unsigned long Bpp = (is8bpp ? 1 : 4);
836 unsigned long nwidth = width & -2048;
839 fdata = (2048 - 1) | align;
840 ldata = ((width & 2047) - 1) | align;
842 for (i = 0; i < height; ++i) {
843 for (j = 0; j < nwidth; j += 2048)
844 __raw_writel(fdata, fb_base + pos + j*Bpp);
846 __raw_writel(ldata, fb_base + pos + j*Bpp);
852 /* Disable block fill mode. */
854 ? TGA_MODE_SBM_8BPP | TGA_MODE_SIMPLE
855 : TGA_MODE_SBM_24BPP | TGA_MODE_SIMPLE),
856 regs_base + TGA_MODE_REG);
860 * tgafb_copyarea - REQUIRED function. Can use generic routines if
861 * non acclerated hardware and packed pixel based.
862 * Copies on area of the screen to another area.
864 * @info: frame buffer structure that represents a single frame buffer
865 * @area: structure defining the source and destination.
868 /* Handle the special case of copying entire lines, e.g. during scrolling.
869 We can avoid a lot of needless computation in this case. In the 8bpp
870 case we need to use the COPY64 registers instead of mask writes into
871 the frame buffer to achieve maximum performance. */
874 copyarea_line_8bpp(struct fb_info *info, u32 dy, u32 sy,
875 u32 height, u32 width)
877 struct tga_par *par = (struct tga_par *) info->par;
878 void __iomem *tga_regs = par->tga_regs_base;
879 unsigned long dpos, spos, i, n64;
881 /* Set up the MODE and PIXELSHIFT registers. */
882 __raw_writel(TGA_MODE_SBM_8BPP | TGA_MODE_COPY, tga_regs+TGA_MODE_REG);
883 __raw_writel(0, tga_regs+TGA_PIXELSHIFT_REG);
886 n64 = (height * width) / 64;
889 spos = (sy + height) * width;
890 dpos = (dy + height) * width;
892 for (i = 0; i < n64; ++i) {
895 __raw_writel(spos, tga_regs+TGA_COPY64_SRC);
897 __raw_writel(dpos, tga_regs+TGA_COPY64_DST);
904 for (i = 0; i < n64; ++i) {
905 __raw_writel(spos, tga_regs+TGA_COPY64_SRC);
907 __raw_writel(dpos, tga_regs+TGA_COPY64_DST);
914 /* Reset the MODE register to normal. */
915 __raw_writel(TGA_MODE_SBM_8BPP|TGA_MODE_SIMPLE, tga_regs+TGA_MODE_REG);
919 copyarea_line_32bpp(struct fb_info *info, u32 dy, u32 sy,
920 u32 height, u32 width)
922 struct tga_par *par = (struct tga_par *) info->par;
923 void __iomem *tga_regs = par->tga_regs_base;
924 void __iomem *tga_fb = par->tga_fb_base;
927 unsigned long i, n16;
929 /* Set up the MODE and PIXELSHIFT registers. */
930 __raw_writel(TGA_MODE_SBM_24BPP | TGA_MODE_COPY, tga_regs+TGA_MODE_REG);
931 __raw_writel(0, tga_regs+TGA_PIXELSHIFT_REG);
934 n16 = (height * width) / 16;
937 src = tga_fb + (sy + height) * width * 4;
938 dst = tga_fb + (dy + height) * width * 4;
940 for (i = 0; i < n16; ++i) {
943 __raw_writel(0xffff, src);
945 __raw_writel(0xffff, dst);
949 src = tga_fb + sy * width * 4;
950 dst = tga_fb + dy * width * 4;
952 for (i = 0; i < n16; ++i) {
953 __raw_writel(0xffff, src);
955 __raw_writel(0xffff, dst);
962 /* Reset the MODE register to normal. */
963 __raw_writel(TGA_MODE_SBM_24BPP|TGA_MODE_SIMPLE, tga_regs+TGA_MODE_REG);
966 /* The general case of forward copy in 8bpp mode. */
968 copyarea_foreward_8bpp(struct fb_info *info, u32 dx, u32 dy, u32 sx, u32 sy,
969 u32 height, u32 width, u32 line_length)
971 struct tga_par *par = (struct tga_par *) info->par;
972 unsigned long i, copied, left;
973 unsigned long dpos, spos, dalign, salign, yincr;
974 u32 smask_first, dmask_first, dmask_last;
975 int pixel_shift, need_prime, need_second;
976 unsigned long n64, n32, xincr_first;
977 void __iomem *tga_regs;
978 void __iomem *tga_fb;
987 /* Compute the offsets and alignments in the frame buffer.
988 More than anything else, these control how we do copies. */
989 dpos = dy * line_length + dx;
990 spos = sy * line_length + sx;
996 /* Compute the value for the PIXELSHIFT register. This controls
997 both non-co-aligned source and destination and copy direction. */
998 if (dalign >= salign)
999 pixel_shift = dalign - salign;
1001 pixel_shift = 8 - (salign - dalign);
1003 /* Figure out if we need an additional priming step for the
1004 residue register. */
1005 need_prime = (salign > dalign);
1009 /* Begin by copying the leading unaligned destination. Copy enough
1010 to make the next destination address 32-byte aligned. */
1011 copied = 32 - (dalign + (dpos & 31));
1014 xincr_first = (copied + 7) & -8;
1015 smask_first = dmask_first = (1ul << copied) - 1;
1016 smask_first <<= salign;
1017 dmask_first <<= dalign + need_prime*8;
1018 if (need_prime && copied > 24)
1020 left = width - copied;
1022 /* Care for small copies. */
1023 if (copied > width) {
1025 t = (1ul << width) - 1;
1026 t <<= dalign + need_prime*8;
1031 /* Attempt to use 64-byte copies. This is only possible if the
1032 source and destination are co-aligned at 64 bytes. */
1033 n64 = need_second = 0;
1034 if ((dpos & 63) == (spos & 63)
1035 && (height == 1 || line_length % 64 == 0)) {
1036 /* We may need a 32-byte copy to ensure 64 byte alignment. */
1037 need_second = (dpos + xincr_first) & 63;
1038 if ((need_second & 32) != need_second)
1039 printk(KERN_ERR "tgafb: need_second wrong\n");
1040 if (left >= need_second + 64) {
1041 left -= need_second;
1048 /* Copy trailing full 32-byte sections. This will be the main
1049 loop if the 64 byte loop can't be used. */
1053 /* Copy the trailing unaligned destination. */
1054 dmask_last = (1ul << left) - 1;
1056 tga_regs = par->tga_regs_base;
1057 tga_fb = par->tga_fb_base;
1059 /* Set up the MODE and PIXELSHIFT registers. */
1060 __raw_writel(TGA_MODE_SBM_8BPP|TGA_MODE_COPY, tga_regs+TGA_MODE_REG);
1061 __raw_writel(pixel_shift, tga_regs+TGA_PIXELSHIFT_REG);
1064 for (i = 0; i < height; ++i) {
1069 sfb = tga_fb + spos;
1070 dfb = tga_fb + dpos;
1072 __raw_writel(smask_first, sfb);
1074 __raw_writel(dmask_first, dfb);
1081 __raw_writel(0xffffffff, sfb);
1083 __raw_writel(0xffffffff, dfb);
1089 if (n64 && (((unsigned long)sfb | (unsigned long)dfb) & 63))
1091 "tgafb: misaligned copy64 (s:%p, d:%p)\n",
1094 for (j = 0; j < n64; ++j) {
1095 __raw_writel(sfb - tga_fb, tga_regs+TGA_COPY64_SRC);
1097 __raw_writel(dfb - tga_fb, tga_regs+TGA_COPY64_DST);
1103 for (j = 0; j < n32; ++j) {
1104 __raw_writel(0xffffffff, sfb);
1106 __raw_writel(0xffffffff, dfb);
1113 __raw_writel(0xffffffff, sfb);
1115 __raw_writel(dmask_last, dfb);
1123 /* Reset the MODE register to normal. */
1124 __raw_writel(TGA_MODE_SBM_8BPP|TGA_MODE_SIMPLE, tga_regs+TGA_MODE_REG);
1127 /* The (almost) general case of backward copy in 8bpp mode. */
1129 copyarea_backward_8bpp(struct fb_info *info, u32 dx, u32 dy, u32 sx, u32 sy,
1130 u32 height, u32 width, u32 line_length,
1131 const struct fb_copyarea *area)
1133 struct tga_par *par = (struct tga_par *) info->par;
1134 unsigned long i, left, yincr;
1135 unsigned long depos, sepos, dealign, sealign;
1136 u32 mask_first, mask_last;
1138 void __iomem *tga_regs;
1139 void __iomem *tga_fb;
1141 yincr = line_length;
1148 /* Compute the offsets and alignments in the frame buffer.
1149 More than anything else, these control how we do copies. */
1150 depos = dy * line_length + dx + width;
1151 sepos = sy * line_length + sx + width;
1152 dealign = depos & 7;
1153 sealign = sepos & 7;
1155 /* ??? The documentation appears to be incorrect (or very
1156 misleading) wrt how pixel shifting works in backward copy
1157 mode, i.e. when PIXELSHIFT is negative. I give up for now.
1158 Do handle the common case of co-aligned backward copies,
1159 but frob everything else back on generic code. */
1160 if (dealign != sealign) {
1161 cfb_copyarea(info, area);
1165 /* We begin the copy with the trailing pixels of the
1166 unaligned destination. */
1167 mask_first = (1ul << dealign) - 1;
1168 left = width - dealign;
1170 /* Care for small copies. */
1171 if (dealign > width) {
1172 mask_first ^= (1ul << (dealign - width)) - 1;
1176 /* Next copy full words at a time. */
1180 /* Finally copy the unaligned head of the span. */
1181 mask_last = -1 << (32 - left);
1183 tga_regs = par->tga_regs_base;
1184 tga_fb = par->tga_fb_base;
1186 /* Set up the MODE and PIXELSHIFT registers. */
1187 __raw_writel(TGA_MODE_SBM_8BPP|TGA_MODE_COPY, tga_regs+TGA_MODE_REG);
1188 __raw_writel(0, tga_regs+TGA_PIXELSHIFT_REG);
1191 for (i = 0; i < height; ++i) {
1196 sfb = tga_fb + sepos;
1197 dfb = tga_fb + depos;
1199 __raw_writel(mask_first, sfb);
1201 __raw_writel(mask_first, dfb);
1205 for (j = 0; j < n32; ++j) {
1208 __raw_writel(0xffffffff, sfb);
1210 __raw_writel(0xffffffff, dfb);
1217 __raw_writel(mask_last, sfb);
1219 __raw_writel(mask_last, dfb);
1227 /* Reset the MODE register to normal. */
1228 __raw_writel(TGA_MODE_SBM_8BPP|TGA_MODE_SIMPLE, tga_regs+TGA_MODE_REG);
1232 tgafb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
1234 unsigned long dx, dy, width, height, sx, sy, vxres, vyres;
1235 unsigned long line_length, bpp;
1239 width = area->width;
1240 height = area->height;
1243 vxres = info->var.xres_virtual;
1244 vyres = info->var.yres_virtual;
1245 line_length = info->fix.line_length;
1247 /* The top left corners must be in the virtual screen. */
1248 if (dx > vxres || sx > vxres || dy > vyres || sy > vyres)
1251 /* Clip the destination. */
1252 if (dx + width > vxres)
1254 if (dy + height > vyres)
1255 height = vyres - dy;
1257 /* The source must be completely inside the virtual screen. */
1258 if (sx + width > vxres || sy + height > vyres)
1261 bpp = info->var.bits_per_pixel;
1263 /* Detect copies of the entire line. */
1264 if (width * (bpp >> 3) == line_length) {
1266 copyarea_line_8bpp(info, dy, sy, height, width);
1268 copyarea_line_32bpp(info, dy, sy, height, width);
1271 /* ??? The documentation is unclear to me exactly how the pixelshift
1272 register works in 32bpp mode. Since I don't have hardware to test,
1273 give up for now and fall back on the generic routines. */
1275 cfb_copyarea(info, area);
1277 /* Detect overlapping source and destination that requires
1279 else if (dy == sy && dx > sx && dx < sx + width)
1280 copyarea_backward_8bpp(info, dx, dy, sx, sy, height,
1281 width, line_length, area);
1283 copyarea_foreward_8bpp(info, dx, dy, sx, sy, height,
1284 width, line_length);
1293 tgafb_init_fix(struct fb_info *info)
1295 struct tga_par *par = (struct tga_par *)info->par;
1296 u8 tga_type = par->tga_type;
1297 const char *tga_type_name;
1300 case TGA_TYPE_8PLANE:
1301 tga_type_name = "Digital ZLXp-E1";
1303 case TGA_TYPE_24PLANE:
1304 tga_type_name = "Digital ZLXp-E2";
1306 case TGA_TYPE_24PLUSZ:
1307 tga_type_name = "Digital ZLXp-E3";
1310 tga_type_name = "Unknown";
1314 strlcpy(info->fix.id, tga_type_name, sizeof(info->fix.id));
1316 info->fix.type = FB_TYPE_PACKED_PIXELS;
1317 info->fix.type_aux = 0;
1318 info->fix.visual = (tga_type == TGA_TYPE_8PLANE
1319 ? FB_VISUAL_PSEUDOCOLOR
1320 : FB_VISUAL_TRUECOLOR);
1322 info->fix.line_length = par->xres * (par->bits_per_pixel >> 3);
1323 info->fix.smem_start = (size_t) par->tga_fb_base;
1324 info->fix.smem_len = info->fix.line_length * par->yres;
1325 info->fix.mmio_start = (size_t) par->tga_regs_base;
1326 info->fix.mmio_len = 512;
1328 info->fix.xpanstep = 0;
1329 info->fix.ypanstep = 0;
1330 info->fix.ywrapstep = 0;
1332 info->fix.accel = FB_ACCEL_DEC_TGA;
1335 static __devinit int
1336 tgafb_pci_register(struct pci_dev *pdev, const struct pci_device_id *ent)
1338 static unsigned int const fb_offset_presets[4] = {
1339 TGA_8PLANE_FB_OFFSET,
1340 TGA_24PLANE_FB_OFFSET,
1342 TGA_24PLUSZ_FB_OFFSET
1346 struct fb_info info;
1348 u32 pseudo_palette[16];
1351 void __iomem *mem_base;
1352 unsigned long bar0_start, bar0_len;
1356 /* Enable device in PCI config. */
1357 if (pci_enable_device(pdev)) {
1358 printk(KERN_ERR "tgafb: Cannot enable PCI device\n");
1362 /* Allocate the fb and par structures. */
1363 all = kmalloc(sizeof(*all), GFP_KERNEL);
1365 printk(KERN_ERR "tgafb: Cannot allocate memory\n");
1368 memset(all, 0, sizeof(*all));
1369 pci_set_drvdata(pdev, all);
1371 /* Request the mem regions. */
1372 bar0_start = pci_resource_start(pdev, 0);
1373 bar0_len = pci_resource_len(pdev, 0);
1375 if (!request_mem_region (bar0_start, bar0_len, "tgafb")) {
1376 printk(KERN_ERR "tgafb: cannot reserve FB region\n");
1380 /* Map the framebuffer. */
1381 mem_base = ioremap(bar0_start, bar0_len);
1383 printk(KERN_ERR "tgafb: Cannot map MMIO\n");
1387 /* Grab info about the card. */
1388 tga_type = (readl(mem_base) >> 12) & 0x0f;
1389 all->par.pdev = pdev;
1390 all->par.tga_mem_base = mem_base;
1391 all->par.tga_fb_base = mem_base + fb_offset_presets[tga_type];
1392 all->par.tga_regs_base = mem_base + TGA_REGS_OFFSET;
1393 all->par.tga_type = tga_type;
1394 pci_read_config_byte(pdev, PCI_REVISION_ID, &all->par.tga_chip_rev);
1396 /* Setup framebuffer. */
1397 all->info.flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA |
1398 FBINFO_HWACCEL_IMAGEBLIT | FBINFO_HWACCEL_FILLRECT;
1399 all->info.fbops = &tgafb_ops;
1400 all->info.screen_base = all->par.tga_fb_base;
1401 all->info.par = &all->par;
1402 all->info.pseudo_palette = all->pseudo_palette;
1404 /* This should give a reasonable default video mode. */
1406 ret = fb_find_mode(&all->info.var, &all->info, mode_option,
1408 tga_type == TGA_TYPE_8PLANE ? 8 : 32);
1409 if (ret == 0 || ret == 4) {
1410 printk(KERN_ERR "tgafb: Could not find valid video mode\n");
1415 if (fb_alloc_cmap(&all->info.cmap, 256, 0)) {
1416 printk(KERN_ERR "tgafb: Could not allocate color map\n");
1421 tgafb_set_par(&all->info);
1422 tgafb_init_fix(&all->info);
1424 all->info.device = &pdev->dev;
1425 if (register_framebuffer(&all->info) < 0) {
1426 printk(KERN_ERR "tgafb: Could not register framebuffer\n");
1431 printk(KERN_INFO "tgafb: DC21030 [TGA] detected, rev=0x%02x\n",
1432 all->par.tga_chip_rev);
1433 printk(KERN_INFO "tgafb: at PCI bus %d, device %d, function %d\n",
1434 pdev->bus->number, PCI_SLOT(pdev->devfn),
1435 PCI_FUNC(pdev->devfn));
1436 printk(KERN_INFO "fb%d: %s frame buffer device at 0x%lx\n",
1437 all->info.node, all->info.fix.id, bar0_start);
1444 release_mem_region(bar0_start, bar0_len);
1451 tgafb_pci_unregister(struct pci_dev *pdev)
1453 struct fb_info *info = pci_get_drvdata(pdev);
1454 struct tga_par *par = info->par;
1458 unregister_framebuffer(info);
1459 iounmap(par->tga_mem_base);
1460 release_mem_region(pci_resource_start(pdev, 0),
1461 pci_resource_len(pdev, 0));
1469 pci_unregister_driver(&tgafb_driver);
1475 tgafb_setup(char *arg)
1480 while ((this_opt = strsep(&arg, ","))) {
1483 if (!strncmp(this_opt, "mode:", 5))
1484 mode_option = this_opt+5;
1487 "tgafb: unknown parameter %s\n",
1494 #endif /* !MODULE */
1500 char *option = NULL;
1502 if (fb_get_options("tgafb", &option))
1504 tgafb_setup(option);
1506 return pci_register_driver(&tgafb_driver);
1513 module_init(tgafb_init);
1516 module_exit(tgafb_exit);
1519 MODULE_DESCRIPTION("framebuffer driver for TGA chipset");
1520 MODULE_LICENSE("GPL");