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/errno.h>
17 #include <linux/string.h>
19 #include <linux/slab.h>
20 #include <linux/delay.h>
21 #include <linux/init.h>
23 #include <linux/pci.h>
24 #include <linux/selection.h>
25 #include <linux/bitrev.h>
27 #include <video/tgafb.h>
33 static int tgafb_check_var(struct fb_var_screeninfo *, struct fb_info *);
34 static int tgafb_set_par(struct fb_info *);
35 static void tgafb_set_pll(struct tga_par *, int);
36 static int tgafb_setcolreg(unsigned, unsigned, unsigned, unsigned,
37 unsigned, struct fb_info *);
38 static int tgafb_blank(int, struct fb_info *);
39 static void tgafb_init_fix(struct fb_info *);
41 static void tgafb_imageblit(struct fb_info *, const struct fb_image *);
42 static void tgafb_fillrect(struct fb_info *, const struct fb_fillrect *);
43 static void tgafb_copyarea(struct fb_info *, const struct fb_copyarea *);
45 static int __devinit tgafb_pci_register(struct pci_dev *,
46 const struct pci_device_id *);
47 static void __devexit 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_DEVICE(PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_DEC_TGA) },
76 MODULE_DEVICE_TABLE(pci, tgafb_pci_table);
78 static struct pci_driver tgafb_driver = {
80 .id_table = tgafb_pci_table,
81 .probe = tgafb_pci_register,
82 .remove = __devexit_p(tgafb_pci_unregister),
87 * tgafb_check_var - Optional function. Validates a var passed in.
88 * @var: frame buffer variable screen structure
89 * @info: frame buffer structure that represents a single frame buffer
92 tgafb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
94 struct tga_par *par = (struct tga_par *)info->par;
96 if (par->tga_type == TGA_TYPE_8PLANE) {
97 if (var->bits_per_pixel != 8)
100 if (var->bits_per_pixel != 32)
103 var->red.length = var->green.length = var->blue.length = 8;
104 if (var->bits_per_pixel == 32) {
105 var->red.offset = 16;
106 var->green.offset = 8;
107 var->blue.offset = 0;
110 if (var->xres_virtual != var->xres || var->yres_virtual != var->yres)
114 if (1000000000 / var->pixclock > TGA_PLL_MAX_FREQ)
116 if ((var->vmode & FB_VMODE_MASK) != FB_VMODE_NONINTERLACED)
119 /* Some of the acceleration routines assume the line width is
120 a multiple of 64 bytes. */
121 if (var->xres * (par->tga_type == TGA_TYPE_8PLANE ? 1 : 4) % 64)
128 * tgafb_set_par - Optional function. Alters the hardware state.
129 * @info: frame buffer structure that represents a single frame buffer
132 tgafb_set_par(struct fb_info *info)
134 static unsigned int const deep_presets[4] = {
140 static unsigned int const rasterop_presets[4] = {
146 static unsigned int const mode_presets[4] = {
152 static unsigned int const base_addr_presets[4] = {
159 struct tga_par *par = (struct tga_par *) info->par;
160 u32 htimings, vtimings, pll_freq;
164 /* Encode video timings. */
165 htimings = (((info->var.xres/4) & TGA_HORIZ_ACT_LSB)
166 | (((info->var.xres/4) & 0x600 << 19) & TGA_HORIZ_ACT_MSB));
167 vtimings = (info->var.yres & TGA_VERT_ACTIVE);
168 htimings |= ((info->var.right_margin/4) << 9) & TGA_HORIZ_FP;
169 vtimings |= (info->var.lower_margin << 11) & TGA_VERT_FP;
170 htimings |= ((info->var.hsync_len/4) << 14) & TGA_HORIZ_SYNC;
171 vtimings |= (info->var.vsync_len << 16) & TGA_VERT_SYNC;
172 htimings |= ((info->var.left_margin/4) << 21) & TGA_HORIZ_BP;
173 vtimings |= (info->var.upper_margin << 22) & TGA_VERT_BP;
175 if (info->var.sync & FB_SYNC_HOR_HIGH_ACT)
176 htimings |= TGA_HORIZ_POLARITY;
177 if (info->var.sync & FB_SYNC_VERT_HIGH_ACT)
178 vtimings |= TGA_VERT_POLARITY;
180 par->htimings = htimings;
181 par->vtimings = vtimings;
183 par->sync_on_green = !!(info->var.sync & FB_SYNC_ON_GREEN);
185 /* Store other useful values in par. */
186 par->xres = info->var.xres;
187 par->yres = info->var.yres;
188 par->pll_freq = pll_freq = 1000000000 / info->var.pixclock;
189 par->bits_per_pixel = info->var.bits_per_pixel;
191 tga_type = par->tga_type;
193 /* First, disable video. */
194 TGA_WRITE_REG(par, TGA_VALID_VIDEO | TGA_VALID_BLANK, TGA_VALID_REG);
196 /* Write the DEEP register. */
197 while (TGA_READ_REG(par, TGA_CMD_STAT_REG) & 1) /* wait for not busy */
200 TGA_WRITE_REG(par, deep_presets[tga_type] |
201 (par->sync_on_green ? 0x0 : 0x00010000),
203 while (TGA_READ_REG(par, TGA_CMD_STAT_REG) & 1) /* wait for not busy */
207 /* Write some more registers. */
208 TGA_WRITE_REG(par, rasterop_presets[tga_type], TGA_RASTEROP_REG);
209 TGA_WRITE_REG(par, mode_presets[tga_type], TGA_MODE_REG);
210 TGA_WRITE_REG(par, base_addr_presets[tga_type], TGA_BASE_ADDR_REG);
212 /* Calculate & write the PLL. */
213 tgafb_set_pll(par, pll_freq);
215 /* Write some more registers. */
216 TGA_WRITE_REG(par, 0xffffffff, TGA_PLANEMASK_REG);
217 TGA_WRITE_REG(par, 0xffffffff, TGA_PIXELMASK_REG);
219 /* Init video timing regs. */
220 TGA_WRITE_REG(par, htimings, TGA_HORIZ_REG);
221 TGA_WRITE_REG(par, vtimings, TGA_VERT_REG);
223 /* Initalise RAMDAC. */
224 if (tga_type == TGA_TYPE_8PLANE) {
226 /* Init BT485 RAMDAC registers. */
227 BT485_WRITE(par, 0xa2 | (par->sync_on_green ? 0x8 : 0x0),
229 BT485_WRITE(par, 0x01, BT485_ADDR_PAL_WRITE);
230 BT485_WRITE(par, 0x14, BT485_CMD_3); /* cursor 64x64 */
231 BT485_WRITE(par, 0x40, BT485_CMD_1);
232 BT485_WRITE(par, 0x20, BT485_CMD_2); /* cursor off, for now */
233 BT485_WRITE(par, 0xff, BT485_PIXEL_MASK);
235 /* Fill palette registers. */
236 BT485_WRITE(par, 0x00, BT485_ADDR_PAL_WRITE);
237 TGA_WRITE_REG(par, BT485_DATA_PAL, TGA_RAMDAC_SETUP_REG);
239 #ifdef CONFIG_HW_CONSOLE
240 for (i = 0; i < 16; i++) {
241 int j = color_table[i];
243 TGA_WRITE_REG(par, default_red[j]|(BT485_DATA_PAL<<8),
245 TGA_WRITE_REG(par, default_grn[j]|(BT485_DATA_PAL<<8),
247 TGA_WRITE_REG(par, default_blu[j]|(BT485_DATA_PAL<<8),
250 for (i = 0; i < 240 * 3; i += 4) {
252 for (i = 0; i < 256 * 3; i += 4) {
254 TGA_WRITE_REG(par, 0x55 | (BT485_DATA_PAL << 8),
256 TGA_WRITE_REG(par, 0x00 | (BT485_DATA_PAL << 8),
258 TGA_WRITE_REG(par, 0x00 | (BT485_DATA_PAL << 8),
260 TGA_WRITE_REG(par, 0x00 | (BT485_DATA_PAL << 8),
264 } else { /* 24-plane or 24plusZ */
266 /* Init BT463 RAMDAC registers. */
267 BT463_WRITE(par, BT463_REG_ACC, BT463_CMD_REG_0, 0x40);
268 BT463_WRITE(par, BT463_REG_ACC, BT463_CMD_REG_1, 0x08);
269 BT463_WRITE(par, BT463_REG_ACC, BT463_CMD_REG_2,
270 (par->sync_on_green ? 0xc0 : 0x40));
272 BT463_WRITE(par, BT463_REG_ACC, BT463_READ_MASK_0, 0xff);
273 BT463_WRITE(par, BT463_REG_ACC, BT463_READ_MASK_1, 0xff);
274 BT463_WRITE(par, BT463_REG_ACC, BT463_READ_MASK_2, 0xff);
275 BT463_WRITE(par, BT463_REG_ACC, BT463_READ_MASK_3, 0x0f);
277 BT463_WRITE(par, BT463_REG_ACC, BT463_BLINK_MASK_0, 0x00);
278 BT463_WRITE(par, BT463_REG_ACC, BT463_BLINK_MASK_1, 0x00);
279 BT463_WRITE(par, BT463_REG_ACC, BT463_BLINK_MASK_2, 0x00);
280 BT463_WRITE(par, BT463_REG_ACC, BT463_BLINK_MASK_3, 0x00);
282 /* Fill the palette. */
283 BT463_LOAD_ADDR(par, 0x0000);
284 TGA_WRITE_REG(par, BT463_PALETTE << 2, TGA_RAMDAC_SETUP_REG);
286 #ifdef CONFIG_HW_CONSOLE
287 for (i = 0; i < 16; i++) {
288 int j = color_table[i];
290 TGA_WRITE_REG(par, default_red[j], TGA_RAMDAC_REG);
291 TGA_WRITE_REG(par, default_grn[j], TGA_RAMDAC_REG);
292 TGA_WRITE_REG(par, default_blu[j], TGA_RAMDAC_REG);
294 for (i = 0; i < 512 * 3; i += 4) {
296 for (i = 0; i < 528 * 3; i += 4) {
298 TGA_WRITE_REG(par, 0x55, TGA_RAMDAC_REG);
299 TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
300 TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
301 TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
304 /* Fill window type table after start of vertical retrace. */
305 while (!(TGA_READ_REG(par, TGA_INTR_STAT_REG) & 0x01))
307 TGA_WRITE_REG(par, 0x01, TGA_INTR_STAT_REG);
309 while (!(TGA_READ_REG(par, TGA_INTR_STAT_REG) & 0x01))
311 TGA_WRITE_REG(par, 0x01, TGA_INTR_STAT_REG);
313 BT463_LOAD_ADDR(par, BT463_WINDOW_TYPE_BASE);
314 TGA_WRITE_REG(par, BT463_REG_ACC << 2, TGA_RAMDAC_SETUP_REG);
316 for (i = 0; i < 16; i++) {
317 TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
318 TGA_WRITE_REG(par, 0x01, TGA_RAMDAC_REG);
319 TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
324 /* Finally, enable video scan (and pray for the monitor... :-) */
325 TGA_WRITE_REG(par, TGA_VALID_VIDEO, TGA_VALID_REG);
330 #define DIFFCHECK(X) \
333 int delta = f - (TGA_PLL_BASE_FREQ * (X)) / (r << shift); \
336 if (delta < min_diff) \
337 min_diff = delta, vm = m, va = a, vr = r; \
342 tgafb_set_pll(struct tga_par *par, int f)
344 int n, shift, base, min_diff, target;
345 int r,a,m,vm = 34, va = 1, vr = 30;
347 for (r = 0 ; r < 12 ; r++)
348 TGA_WRITE_REG(par, !r, TGA_CLOCK_REG);
350 if (f > TGA_PLL_MAX_FREQ)
351 f = TGA_PLL_MAX_FREQ;
353 if (f >= TGA_PLL_MAX_FREQ / 2)
355 else if (f >= TGA_PLL_MAX_FREQ / 4)
360 TGA_WRITE_REG(par, shift & 1, TGA_CLOCK_REG);
361 TGA_WRITE_REG(par, shift >> 1, TGA_CLOCK_REG);
363 for (r = 0 ; r < 10 ; r++)
364 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
367 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
368 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
370 else if (f <= 200000) {
371 TGA_WRITE_REG(par, 1, TGA_CLOCK_REG);
372 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
375 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
376 TGA_WRITE_REG(par, 1, TGA_CLOCK_REG);
379 TGA_WRITE_REG(par, 1, TGA_CLOCK_REG);
380 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
381 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
382 TGA_WRITE_REG(par, 1, TGA_CLOCK_REG);
383 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
384 TGA_WRITE_REG(par, 1, TGA_CLOCK_REG);
386 target = (f << shift) / TGA_PLL_BASE_FREQ;
387 min_diff = TGA_PLL_MAX_FREQ;
394 for (n = base < 7 ? 7 : base; n < base + target && n < 449; n++) {
395 m = ((n + 3) / 7) - 1;
397 DIFFCHECK((m + 1) * 7);
399 DIFFCHECK((m + 1) * 7);
410 for (r = 0; r < 8; r++)
411 TGA_WRITE_REG(par, (vm >> r) & 1, TGA_CLOCK_REG);
412 for (r = 0; r < 8 ; r++)
413 TGA_WRITE_REG(par, (va >> r) & 1, TGA_CLOCK_REG);
414 for (r = 0; r < 7 ; r++)
415 TGA_WRITE_REG(par, (vr >> r) & 1, TGA_CLOCK_REG);
416 TGA_WRITE_REG(par, ((vr >> 7) & 1)|2, TGA_CLOCK_REG);
421 * tgafb_setcolreg - Optional function. Sets a color register.
422 * @regno: boolean, 0 copy local, 1 get_user() function
423 * @red: frame buffer colormap structure
424 * @green: The green value which can be up to 16 bits wide
425 * @blue: The blue value which can be up to 16 bits wide.
426 * @transp: If supported the alpha value which can be up to 16 bits wide.
427 * @info: frame buffer info structure
430 tgafb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue,
431 unsigned transp, struct fb_info *info)
433 struct tga_par *par = (struct tga_par *) info->par;
441 if (par->tga_type == TGA_TYPE_8PLANE) {
442 BT485_WRITE(par, regno, BT485_ADDR_PAL_WRITE);
443 TGA_WRITE_REG(par, BT485_DATA_PAL, TGA_RAMDAC_SETUP_REG);
444 TGA_WRITE_REG(par, red|(BT485_DATA_PAL<<8),TGA_RAMDAC_REG);
445 TGA_WRITE_REG(par, green|(BT485_DATA_PAL<<8),TGA_RAMDAC_REG);
446 TGA_WRITE_REG(par, blue|(BT485_DATA_PAL<<8),TGA_RAMDAC_REG);
449 u32 value = (regno << 16) | (regno << 8) | regno;
450 ((u32 *)info->pseudo_palette)[regno] = value;
452 BT463_LOAD_ADDR(par, regno);
453 TGA_WRITE_REG(par, BT463_PALETTE << 2, TGA_RAMDAC_SETUP_REG);
454 TGA_WRITE_REG(par, red, TGA_RAMDAC_REG);
455 TGA_WRITE_REG(par, green, TGA_RAMDAC_REG);
456 TGA_WRITE_REG(par, blue, TGA_RAMDAC_REG);
464 * tgafb_blank - Optional function. Blanks the display.
465 * @blank_mode: the blank mode we want.
466 * @info: frame buffer structure that represents a single frame buffer
469 tgafb_blank(int blank, struct fb_info *info)
471 struct tga_par *par = (struct tga_par *) info->par;
472 u32 vhcr, vvcr, vvvr;
475 local_irq_save(flags);
477 vhcr = TGA_READ_REG(par, TGA_HORIZ_REG);
478 vvcr = TGA_READ_REG(par, TGA_VERT_REG);
479 vvvr = TGA_READ_REG(par, TGA_VALID_REG);
480 vvvr &= ~(TGA_VALID_VIDEO | TGA_VALID_BLANK);
483 case FB_BLANK_UNBLANK: /* Unblanking */
484 if (par->vesa_blanked) {
485 TGA_WRITE_REG(par, vhcr & 0xbfffffff, TGA_HORIZ_REG);
486 TGA_WRITE_REG(par, vvcr & 0xbfffffff, TGA_VERT_REG);
487 par->vesa_blanked = 0;
489 TGA_WRITE_REG(par, vvvr | TGA_VALID_VIDEO, TGA_VALID_REG);
492 case FB_BLANK_NORMAL: /* Normal blanking */
493 TGA_WRITE_REG(par, vvvr | TGA_VALID_VIDEO | TGA_VALID_BLANK,
497 case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
498 TGA_WRITE_REG(par, vvcr | 0x40000000, TGA_VERT_REG);
499 TGA_WRITE_REG(par, vvvr | TGA_VALID_BLANK, TGA_VALID_REG);
500 par->vesa_blanked = 1;
503 case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
504 TGA_WRITE_REG(par, vhcr | 0x40000000, TGA_HORIZ_REG);
505 TGA_WRITE_REG(par, vvvr | TGA_VALID_BLANK, TGA_VALID_REG);
506 par->vesa_blanked = 1;
509 case FB_BLANK_POWERDOWN: /* Poweroff */
510 TGA_WRITE_REG(par, vhcr | 0x40000000, TGA_HORIZ_REG);
511 TGA_WRITE_REG(par, vvcr | 0x40000000, TGA_VERT_REG);
512 TGA_WRITE_REG(par, vvvr | TGA_VALID_BLANK, TGA_VALID_REG);
513 par->vesa_blanked = 1;
517 local_irq_restore(flags);
527 * tgafb_imageblit - REQUIRED function. Can use generic routines if
528 * non acclerated hardware and packed pixel based.
529 * Copies a image from system memory to the screen.
531 * @info: frame buffer structure that represents a single frame buffer
532 * @image: structure defining the image.
535 tgafb_imageblit(struct fb_info *info, const struct fb_image *image)
537 struct tga_par *par = (struct tga_par *) info->par;
538 u32 fgcolor, bgcolor, dx, dy, width, height, vxres, vyres, pixelmask;
539 unsigned long rincr, line_length, shift, pos, is8bpp;
541 const unsigned char *data;
542 void __iomem *regs_base;
543 void __iomem *fb_base;
547 width = image->width;
548 height = image->height;
549 vxres = info->var.xres_virtual;
550 vyres = info->var.yres_virtual;
551 line_length = info->fix.line_length;
552 rincr = (width + 7) / 8;
554 /* Crop the image to the screen. */
555 if (dx > vxres || dy > vyres)
557 if (dx + width > vxres)
559 if (dy + height > vyres)
562 /* For copies that aren't pixel expansion, there's little we
563 can do better than the generic code. */
564 /* ??? There is a DMA write mode; I wonder if that could be
565 made to pull the data from the image buffer... */
566 if (image->depth > 1) {
567 cfb_imageblit(info, image);
571 regs_base = par->tga_regs_base;
572 fb_base = par->tga_fb_base;
573 is8bpp = info->var.bits_per_pixel == 8;
575 /* Expand the color values to fill 32-bits. */
576 /* ??? Would be nice to notice colour changes elsewhere, so
577 that we can do this only when necessary. */
578 fgcolor = image->fg_color;
579 bgcolor = image->bg_color;
581 fgcolor |= fgcolor << 8;
582 fgcolor |= fgcolor << 16;
583 bgcolor |= bgcolor << 8;
584 bgcolor |= bgcolor << 16;
587 fgcolor = ((u32 *)info->pseudo_palette)[fgcolor];
589 bgcolor = ((u32 *)info->pseudo_palette)[bgcolor];
591 __raw_writel(fgcolor, regs_base + TGA_FOREGROUND_REG);
592 __raw_writel(bgcolor, regs_base + TGA_BACKGROUND_REG);
594 /* Acquire proper alignment; set up the PIXELMASK register
595 so that we only write the proper character cell. */
596 pos = dy * line_length;
603 shift = (pos & 7) >> 2;
607 data = (const unsigned char *) image->data;
609 /* Enable opaque stipple mode. */
611 ? TGA_MODE_SBM_8BPP | TGA_MODE_OPAQUE_STIPPLE
612 : TGA_MODE_SBM_24BPP | TGA_MODE_OPAQUE_STIPPLE),
613 regs_base + TGA_MODE_REG);
615 if (width + shift <= 32) {
616 unsigned long bwidth;
618 /* Handle common case of imaging a single character, in
619 a font less than 32 pixels wide. */
621 pixelmask = (1 << width) - 1;
623 __raw_writel(pixelmask, regs_base + TGA_PIXELMASK_REG);
626 bwidth = (width + 7) / 8;
628 for (i = 0; i < height; ++i) {
631 /* The image data is bit big endian; we need
633 for (j = 0; j < bwidth; ++j)
634 mask |= bitrev8(data[j]) << (j * 8);
636 __raw_writel(mask << shift, fb_base + pos);
642 __raw_writel(0xffffffff, regs_base + TGA_PIXELMASK_REG);
643 } else if (shift == 0) {
644 unsigned long pos0 = pos;
645 const unsigned char *data0 = data;
646 unsigned long bincr = (is8bpp ? 8 : 8*4);
647 unsigned long bwidth;
649 /* Handle another common case in which accel_putcs
650 generates a large bitmap, which happens to be aligned.
651 Allow the tail to be misaligned. This case is
652 interesting because we've not got to hold partial
653 bytes across the words being written. */
657 bwidth = (width / 8) & -4;
658 for (i = 0; i < height; ++i) {
659 for (j = 0; j < bwidth; j += 4) {
661 mask |= bitrev8(data[j+0]) << (0 * 8);
662 mask |= bitrev8(data[j+1]) << (1 * 8);
663 mask |= bitrev8(data[j+2]) << (2 * 8);
664 mask |= bitrev8(data[j+3]) << (3 * 8);
665 __raw_writel(mask, fb_base + pos + j*bincr);
672 pixelmask = (1ul << (width & 31)) - 1;
674 __raw_writel(pixelmask, regs_base + TGA_PIXELMASK_REG);
677 pos = pos0 + bwidth*bincr;
678 data = data0 + bwidth;
679 bwidth = ((width & 31) + 7) / 8;
681 for (i = 0; i < height; ++i) {
683 for (j = 0; j < bwidth; ++j)
684 mask |= bitrev8(data[j]) << (j * 8);
685 __raw_writel(mask, fb_base + pos);
690 __raw_writel(0xffffffff, regs_base + TGA_PIXELMASK_REG);
693 unsigned long pos0 = pos;
694 const unsigned char *data0 = data;
695 unsigned long bincr = (is8bpp ? 8 : 8*4);
696 unsigned long bwidth;
698 /* Finally, handle the generic case of misaligned start.
699 Here we split the write into 16-bit spans. This allows
700 us to use only one pixel mask, instead of four as would
701 be required by writing 24-bit spans. */
703 pixelmask = 0xffff << shift;
704 __raw_writel(pixelmask, regs_base + TGA_PIXELMASK_REG);
707 bwidth = (width / 8) & -2;
708 for (i = 0; i < height; ++i) {
709 for (j = 0; j < bwidth; j += 2) {
711 mask |= bitrev8(data[j+0]) << (0 * 8);
712 mask |= bitrev8(data[j+1]) << (1 * 8);
714 __raw_writel(mask, fb_base + pos + j*bincr);
721 pixelmask = ((1ul << (width & 15)) - 1) << shift;
723 __raw_writel(pixelmask, regs_base + TGA_PIXELMASK_REG);
726 pos = pos0 + bwidth*bincr;
727 data = data0 + bwidth;
728 bwidth = (width & 15) > 8;
730 for (i = 0; i < height; ++i) {
731 u32 mask = bitrev8(data[0]);
733 mask |= bitrev8(data[1]) << 8;
735 __raw_writel(mask, fb_base + pos);
741 __raw_writel(0xffffffff, regs_base + TGA_PIXELMASK_REG);
744 /* Disable opaque stipple mode. */
746 ? TGA_MODE_SBM_8BPP | TGA_MODE_SIMPLE
747 : TGA_MODE_SBM_24BPP | TGA_MODE_SIMPLE),
748 regs_base + TGA_MODE_REG);
752 * tgafb_fillrect - REQUIRED function. Can use generic routines if
753 * non acclerated hardware and packed pixel based.
754 * Draws a rectangle on the screen.
756 * @info: frame buffer structure that represents a single frame buffer
757 * @rect: structure defining the rectagle and operation.
760 tgafb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
762 struct tga_par *par = (struct tga_par *) info->par;
763 int is8bpp = info->var.bits_per_pixel == 8;
764 u32 dx, dy, width, height, vxres, vyres, color;
765 unsigned long pos, align, line_length, i, j;
766 void __iomem *regs_base;
767 void __iomem *fb_base;
772 height = rect->height;
773 vxres = info->var.xres_virtual;
774 vyres = info->var.yres_virtual;
775 line_length = info->fix.line_length;
776 regs_base = par->tga_regs_base;
777 fb_base = par->tga_fb_base;
779 /* Crop the rectangle to the screen. */
780 if (dx > vxres || dy > vyres || !width || !height)
782 if (dx + width > vxres)
784 if (dy + height > vyres)
787 pos = dy * line_length + dx * (is8bpp ? 1 : 4);
789 /* ??? We could implement ROP_XOR with opaque fill mode
790 and a RasterOp setting of GXxor, but as far as I can
791 tell, this mode is not actually used in the kernel.
792 Thus I am ignoring it for now. */
793 if (rect->rop != ROP_COPY) {
794 cfb_fillrect(info, rect);
798 /* Expand the color value to fill 8 pixels. */
802 color |= color << 16;
803 __raw_writel(color, regs_base + TGA_BLOCK_COLOR0_REG);
804 __raw_writel(color, regs_base + TGA_BLOCK_COLOR1_REG);
807 color = ((u32 *)info->pseudo_palette)[color];
808 __raw_writel(color, regs_base + TGA_BLOCK_COLOR0_REG);
809 __raw_writel(color, regs_base + TGA_BLOCK_COLOR1_REG);
810 __raw_writel(color, regs_base + TGA_BLOCK_COLOR2_REG);
811 __raw_writel(color, regs_base + TGA_BLOCK_COLOR3_REG);
812 __raw_writel(color, regs_base + TGA_BLOCK_COLOR4_REG);
813 __raw_writel(color, regs_base + TGA_BLOCK_COLOR5_REG);
814 __raw_writel(color, regs_base + TGA_BLOCK_COLOR6_REG);
815 __raw_writel(color, regs_base + TGA_BLOCK_COLOR7_REG);
818 /* The DATA register holds the fill mask for block fill mode.
819 Since we're not stippling, this is all ones. */
820 __raw_writel(0xffffffff, regs_base + TGA_DATA_REG);
822 /* Enable block fill mode. */
824 ? TGA_MODE_SBM_8BPP | TGA_MODE_BLOCK_FILL
825 : TGA_MODE_SBM_24BPP | TGA_MODE_BLOCK_FILL),
826 regs_base + TGA_MODE_REG);
829 /* We can fill 2k pixels per operation. Notice blocks that fit
830 the width of the screen so that we can take advantage of this
831 and fill more than one line per write. */
832 if (width == line_length)
833 width *= height, height = 1;
835 /* The write into the frame buffer must be aligned to 4 bytes,
836 but we are allowed to encode the offset within the word in
837 the data word written. */
838 align = (pos & 3) << 16;
844 data = (width - 1) | align;
846 for (i = 0; i < height; ++i) {
847 __raw_writel(data, fb_base + pos);
851 unsigned long Bpp = (is8bpp ? 1 : 4);
852 unsigned long nwidth = width & -2048;
855 fdata = (2048 - 1) | align;
856 ldata = ((width & 2047) - 1) | align;
858 for (i = 0; i < height; ++i) {
859 for (j = 0; j < nwidth; j += 2048)
860 __raw_writel(fdata, fb_base + pos + j*Bpp);
862 __raw_writel(ldata, fb_base + pos + j*Bpp);
868 /* Disable block fill mode. */
870 ? TGA_MODE_SBM_8BPP | TGA_MODE_SIMPLE
871 : TGA_MODE_SBM_24BPP | TGA_MODE_SIMPLE),
872 regs_base + TGA_MODE_REG);
876 * tgafb_copyarea - REQUIRED function. Can use generic routines if
877 * non acclerated hardware and packed pixel based.
878 * Copies on area of the screen to another area.
880 * @info: frame buffer structure that represents a single frame buffer
881 * @area: structure defining the source and destination.
884 /* Handle the special case of copying entire lines, e.g. during scrolling.
885 We can avoid a lot of needless computation in this case. In the 8bpp
886 case we need to use the COPY64 registers instead of mask writes into
887 the frame buffer to achieve maximum performance. */
890 copyarea_line_8bpp(struct fb_info *info, u32 dy, u32 sy,
891 u32 height, u32 width)
893 struct tga_par *par = (struct tga_par *) info->par;
894 void __iomem *tga_regs = par->tga_regs_base;
895 unsigned long dpos, spos, i, n64;
897 /* Set up the MODE and PIXELSHIFT registers. */
898 __raw_writel(TGA_MODE_SBM_8BPP | TGA_MODE_COPY, tga_regs+TGA_MODE_REG);
899 __raw_writel(0, tga_regs+TGA_PIXELSHIFT_REG);
902 n64 = (height * width) / 64;
905 spos = (sy + height) * width;
906 dpos = (dy + height) * width;
908 for (i = 0; i < n64; ++i) {
911 __raw_writel(spos, tga_regs+TGA_COPY64_SRC);
913 __raw_writel(dpos, tga_regs+TGA_COPY64_DST);
920 for (i = 0; i < n64; ++i) {
921 __raw_writel(spos, tga_regs+TGA_COPY64_SRC);
923 __raw_writel(dpos, tga_regs+TGA_COPY64_DST);
930 /* Reset the MODE register to normal. */
931 __raw_writel(TGA_MODE_SBM_8BPP|TGA_MODE_SIMPLE, tga_regs+TGA_MODE_REG);
935 copyarea_line_32bpp(struct fb_info *info, u32 dy, u32 sy,
936 u32 height, u32 width)
938 struct tga_par *par = (struct tga_par *) info->par;
939 void __iomem *tga_regs = par->tga_regs_base;
940 void __iomem *tga_fb = par->tga_fb_base;
943 unsigned long i, n16;
945 /* Set up the MODE and PIXELSHIFT registers. */
946 __raw_writel(TGA_MODE_SBM_24BPP | TGA_MODE_COPY, tga_regs+TGA_MODE_REG);
947 __raw_writel(0, tga_regs+TGA_PIXELSHIFT_REG);
950 n16 = (height * width) / 16;
953 src = tga_fb + (sy + height) * width * 4;
954 dst = tga_fb + (dy + height) * width * 4;
956 for (i = 0; i < n16; ++i) {
959 __raw_writel(0xffff, src);
961 __raw_writel(0xffff, dst);
965 src = tga_fb + sy * width * 4;
966 dst = tga_fb + dy * width * 4;
968 for (i = 0; i < n16; ++i) {
969 __raw_writel(0xffff, src);
971 __raw_writel(0xffff, dst);
978 /* Reset the MODE register to normal. */
979 __raw_writel(TGA_MODE_SBM_24BPP|TGA_MODE_SIMPLE, tga_regs+TGA_MODE_REG);
982 /* The general case of forward copy in 8bpp mode. */
984 copyarea_foreward_8bpp(struct fb_info *info, u32 dx, u32 dy, u32 sx, u32 sy,
985 u32 height, u32 width, u32 line_length)
987 struct tga_par *par = (struct tga_par *) info->par;
988 unsigned long i, copied, left;
989 unsigned long dpos, spos, dalign, salign, yincr;
990 u32 smask_first, dmask_first, dmask_last;
991 int pixel_shift, need_prime, need_second;
992 unsigned long n64, n32, xincr_first;
993 void __iomem *tga_regs;
994 void __iomem *tga_fb;
1003 /* Compute the offsets and alignments in the frame buffer.
1004 More than anything else, these control how we do copies. */
1005 dpos = dy * line_length + dx;
1006 spos = sy * line_length + sx;
1012 /* Compute the value for the PIXELSHIFT register. This controls
1013 both non-co-aligned source and destination and copy direction. */
1014 if (dalign >= salign)
1015 pixel_shift = dalign - salign;
1017 pixel_shift = 8 - (salign - dalign);
1019 /* Figure out if we need an additional priming step for the
1020 residue register. */
1021 need_prime = (salign > dalign);
1025 /* Begin by copying the leading unaligned destination. Copy enough
1026 to make the next destination address 32-byte aligned. */
1027 copied = 32 - (dalign + (dpos & 31));
1030 xincr_first = (copied + 7) & -8;
1031 smask_first = dmask_first = (1ul << copied) - 1;
1032 smask_first <<= salign;
1033 dmask_first <<= dalign + need_prime*8;
1034 if (need_prime && copied > 24)
1036 left = width - copied;
1038 /* Care for small copies. */
1039 if (copied > width) {
1041 t = (1ul << width) - 1;
1042 t <<= dalign + need_prime*8;
1047 /* Attempt to use 64-byte copies. This is only possible if the
1048 source and destination are co-aligned at 64 bytes. */
1049 n64 = need_second = 0;
1050 if ((dpos & 63) == (spos & 63)
1051 && (height == 1 || line_length % 64 == 0)) {
1052 /* We may need a 32-byte copy to ensure 64 byte alignment. */
1053 need_second = (dpos + xincr_first) & 63;
1054 if ((need_second & 32) != need_second)
1055 printk(KERN_ERR "tgafb: need_second wrong\n");
1056 if (left >= need_second + 64) {
1057 left -= need_second;
1064 /* Copy trailing full 32-byte sections. This will be the main
1065 loop if the 64 byte loop can't be used. */
1069 /* Copy the trailing unaligned destination. */
1070 dmask_last = (1ul << left) - 1;
1072 tga_regs = par->tga_regs_base;
1073 tga_fb = par->tga_fb_base;
1075 /* Set up the MODE and PIXELSHIFT registers. */
1076 __raw_writel(TGA_MODE_SBM_8BPP|TGA_MODE_COPY, tga_regs+TGA_MODE_REG);
1077 __raw_writel(pixel_shift, tga_regs+TGA_PIXELSHIFT_REG);
1080 for (i = 0; i < height; ++i) {
1085 sfb = tga_fb + spos;
1086 dfb = tga_fb + dpos;
1088 __raw_writel(smask_first, sfb);
1090 __raw_writel(dmask_first, dfb);
1097 __raw_writel(0xffffffff, sfb);
1099 __raw_writel(0xffffffff, dfb);
1105 if (n64 && (((unsigned long)sfb | (unsigned long)dfb) & 63))
1107 "tgafb: misaligned copy64 (s:%p, d:%p)\n",
1110 for (j = 0; j < n64; ++j) {
1111 __raw_writel(sfb - tga_fb, tga_regs+TGA_COPY64_SRC);
1113 __raw_writel(dfb - tga_fb, tga_regs+TGA_COPY64_DST);
1119 for (j = 0; j < n32; ++j) {
1120 __raw_writel(0xffffffff, sfb);
1122 __raw_writel(0xffffffff, dfb);
1129 __raw_writel(0xffffffff, sfb);
1131 __raw_writel(dmask_last, dfb);
1139 /* Reset the MODE register to normal. */
1140 __raw_writel(TGA_MODE_SBM_8BPP|TGA_MODE_SIMPLE, tga_regs+TGA_MODE_REG);
1143 /* The (almost) general case of backward copy in 8bpp mode. */
1145 copyarea_backward_8bpp(struct fb_info *info, u32 dx, u32 dy, u32 sx, u32 sy,
1146 u32 height, u32 width, u32 line_length,
1147 const struct fb_copyarea *area)
1149 struct tga_par *par = (struct tga_par *) info->par;
1150 unsigned long i, left, yincr;
1151 unsigned long depos, sepos, dealign, sealign;
1152 u32 mask_first, mask_last;
1154 void __iomem *tga_regs;
1155 void __iomem *tga_fb;
1157 yincr = line_length;
1164 /* Compute the offsets and alignments in the frame buffer.
1165 More than anything else, these control how we do copies. */
1166 depos = dy * line_length + dx + width;
1167 sepos = sy * line_length + sx + width;
1168 dealign = depos & 7;
1169 sealign = sepos & 7;
1171 /* ??? The documentation appears to be incorrect (or very
1172 misleading) wrt how pixel shifting works in backward copy
1173 mode, i.e. when PIXELSHIFT is negative. I give up for now.
1174 Do handle the common case of co-aligned backward copies,
1175 but frob everything else back on generic code. */
1176 if (dealign != sealign) {
1177 cfb_copyarea(info, area);
1181 /* We begin the copy with the trailing pixels of the
1182 unaligned destination. */
1183 mask_first = (1ul << dealign) - 1;
1184 left = width - dealign;
1186 /* Care for small copies. */
1187 if (dealign > width) {
1188 mask_first ^= (1ul << (dealign - width)) - 1;
1192 /* Next copy full words at a time. */
1196 /* Finally copy the unaligned head of the span. */
1197 mask_last = -1 << (32 - left);
1199 tga_regs = par->tga_regs_base;
1200 tga_fb = par->tga_fb_base;
1202 /* Set up the MODE and PIXELSHIFT registers. */
1203 __raw_writel(TGA_MODE_SBM_8BPP|TGA_MODE_COPY, tga_regs+TGA_MODE_REG);
1204 __raw_writel(0, tga_regs+TGA_PIXELSHIFT_REG);
1207 for (i = 0; i < height; ++i) {
1212 sfb = tga_fb + sepos;
1213 dfb = tga_fb + depos;
1215 __raw_writel(mask_first, sfb);
1217 __raw_writel(mask_first, dfb);
1221 for (j = 0; j < n32; ++j) {
1224 __raw_writel(0xffffffff, sfb);
1226 __raw_writel(0xffffffff, dfb);
1233 __raw_writel(mask_last, sfb);
1235 __raw_writel(mask_last, dfb);
1243 /* Reset the MODE register to normal. */
1244 __raw_writel(TGA_MODE_SBM_8BPP|TGA_MODE_SIMPLE, tga_regs+TGA_MODE_REG);
1248 tgafb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
1250 unsigned long dx, dy, width, height, sx, sy, vxres, vyres;
1251 unsigned long line_length, bpp;
1255 width = area->width;
1256 height = area->height;
1259 vxres = info->var.xres_virtual;
1260 vyres = info->var.yres_virtual;
1261 line_length = info->fix.line_length;
1263 /* The top left corners must be in the virtual screen. */
1264 if (dx > vxres || sx > vxres || dy > vyres || sy > vyres)
1267 /* Clip the destination. */
1268 if (dx + width > vxres)
1270 if (dy + height > vyres)
1271 height = vyres - dy;
1273 /* The source must be completely inside the virtual screen. */
1274 if (sx + width > vxres || sy + height > vyres)
1277 bpp = info->var.bits_per_pixel;
1279 /* Detect copies of the entire line. */
1280 if (width * (bpp >> 3) == line_length) {
1282 copyarea_line_8bpp(info, dy, sy, height, width);
1284 copyarea_line_32bpp(info, dy, sy, height, width);
1287 /* ??? The documentation is unclear to me exactly how the pixelshift
1288 register works in 32bpp mode. Since I don't have hardware to test,
1289 give up for now and fall back on the generic routines. */
1291 cfb_copyarea(info, area);
1293 /* Detect overlapping source and destination that requires
1295 else if (dy == sy && dx > sx && dx < sx + width)
1296 copyarea_backward_8bpp(info, dx, dy, sx, sy, height,
1297 width, line_length, area);
1299 copyarea_foreward_8bpp(info, dx, dy, sx, sy, height,
1300 width, line_length);
1309 tgafb_init_fix(struct fb_info *info)
1311 struct tga_par *par = (struct tga_par *)info->par;
1312 u8 tga_type = par->tga_type;
1313 const char *tga_type_name;
1316 case TGA_TYPE_8PLANE:
1317 tga_type_name = "Digital ZLXp-E1";
1319 case TGA_TYPE_24PLANE:
1320 tga_type_name = "Digital ZLXp-E2";
1322 case TGA_TYPE_24PLUSZ:
1323 tga_type_name = "Digital ZLXp-E3";
1326 tga_type_name = "Unknown";
1330 strlcpy(info->fix.id, tga_type_name, sizeof(info->fix.id));
1332 info->fix.type = FB_TYPE_PACKED_PIXELS;
1333 info->fix.type_aux = 0;
1334 info->fix.visual = (tga_type == TGA_TYPE_8PLANE
1335 ? FB_VISUAL_PSEUDOCOLOR
1336 : FB_VISUAL_DIRECTCOLOR);
1338 info->fix.line_length = par->xres * (par->bits_per_pixel >> 3);
1339 info->fix.smem_start = (size_t) par->tga_fb_base;
1340 info->fix.smem_len = info->fix.line_length * par->yres;
1341 info->fix.mmio_start = (size_t) par->tga_regs_base;
1342 info->fix.mmio_len = 512;
1344 info->fix.xpanstep = 0;
1345 info->fix.ypanstep = 0;
1346 info->fix.ywrapstep = 0;
1348 info->fix.accel = FB_ACCEL_DEC_TGA;
1351 static __devinit int
1352 tgafb_pci_register(struct pci_dev *pdev, const struct pci_device_id *ent)
1354 static unsigned int const fb_offset_presets[4] = {
1355 TGA_8PLANE_FB_OFFSET,
1356 TGA_24PLANE_FB_OFFSET,
1358 TGA_24PLUSZ_FB_OFFSET
1361 void __iomem *mem_base;
1362 unsigned long bar0_start, bar0_len;
1363 struct fb_info *info;
1364 struct tga_par *par;
1368 /* Enable device in PCI config. */
1369 if (pci_enable_device(pdev)) {
1370 printk(KERN_ERR "tgafb: Cannot enable PCI device\n");
1374 /* Allocate the fb and par structures. */
1375 info = framebuffer_alloc(sizeof(struct tga_par), &pdev->dev);
1377 printk(KERN_ERR "tgafb: Cannot allocate memory\n");
1382 pci_set_drvdata(pdev, info);
1384 /* Request the mem regions. */
1385 bar0_start = pci_resource_start(pdev, 0);
1386 bar0_len = pci_resource_len(pdev, 0);
1388 if (!request_mem_region (bar0_start, bar0_len, "tgafb")) {
1389 printk(KERN_ERR "tgafb: cannot reserve FB region\n");
1393 /* Map the framebuffer. */
1394 mem_base = ioremap(bar0_start, bar0_len);
1396 printk(KERN_ERR "tgafb: Cannot map MMIO\n");
1400 /* Grab info about the card. */
1401 tga_type = (readl(mem_base) >> 12) & 0x0f;
1403 par->tga_mem_base = mem_base;
1404 par->tga_fb_base = mem_base + fb_offset_presets[tga_type];
1405 par->tga_regs_base = mem_base + TGA_REGS_OFFSET;
1406 par->tga_type = tga_type;
1407 pci_read_config_byte(pdev, PCI_REVISION_ID, &par->tga_chip_rev);
1409 /* Setup framebuffer. */
1410 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA |
1411 FBINFO_HWACCEL_IMAGEBLIT | FBINFO_HWACCEL_FILLRECT;
1412 info->fbops = &tgafb_ops;
1413 info->screen_base = par->tga_fb_base;
1414 info->pseudo_palette = (void *)(par + 1);
1416 /* This should give a reasonable default video mode. */
1418 ret = fb_find_mode(&info->var, info, mode_option, NULL, 0, NULL,
1419 tga_type == TGA_TYPE_8PLANE ? 8 : 32);
1420 if (ret == 0 || ret == 4) {
1421 printk(KERN_ERR "tgafb: Could not find valid video mode\n");
1426 if (fb_alloc_cmap(&info->cmap, 256, 0)) {
1427 printk(KERN_ERR "tgafb: Could not allocate color map\n");
1432 tgafb_set_par(info);
1433 tgafb_init_fix(info);
1435 if (register_framebuffer(info) < 0) {
1436 printk(KERN_ERR "tgafb: Could not register framebuffer\n");
1441 printk(KERN_INFO "tgafb: DC21030 [TGA] detected, rev=0x%02x\n",
1443 printk(KERN_INFO "tgafb: at PCI bus %d, device %d, function %d\n",
1444 pdev->bus->number, PCI_SLOT(pdev->devfn),
1445 PCI_FUNC(pdev->devfn));
1446 printk(KERN_INFO "fb%d: %s frame buffer device at 0x%lx\n",
1447 info->node, info->fix.id, bar0_start);
1454 release_mem_region(bar0_start, bar0_len);
1456 framebuffer_release(info);
1460 static void __devexit
1461 tgafb_pci_unregister(struct pci_dev *pdev)
1463 struct fb_info *info = pci_get_drvdata(pdev);
1464 struct tga_par *par = info->par;
1468 unregister_framebuffer(info);
1469 fb_dealloc_cmap(&info->cmap);
1470 iounmap(par->tga_mem_base);
1471 release_mem_region(pci_resource_start(pdev, 0),
1472 pci_resource_len(pdev, 0));
1473 framebuffer_release(info);
1476 static void __devexit
1479 pci_unregister_driver(&tgafb_driver);
1483 static int __devinit
1484 tgafb_setup(char *arg)
1489 while ((this_opt = strsep(&arg, ","))) {
1492 if (!strncmp(this_opt, "mode:", 5))
1493 mode_option = this_opt+5;
1496 "tgafb: unknown parameter %s\n",
1503 #endif /* !MODULE */
1505 static int __devinit
1509 char *option = NULL;
1511 if (fb_get_options("tgafb", &option))
1513 tgafb_setup(option);
1515 return pci_register_driver(&tgafb_driver);
1522 module_init(tgafb_init);
1523 module_exit(tgafb_exit);
1525 MODULE_DESCRIPTION("framebuffer driver for TGA chipset");
1526 MODULE_LICENSE("GPL");