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1 | /* |
2 | * Common utility functions for VGA-based graphics cards. |
3 | * |
4 | * Copyright (c) 2006-2007 Ondrej Zajicek <santiago@crfreenet.org> |
5 | * |
6 | * This file is subject to the terms and conditions of the GNU General Public |
7 | * License. See the file COPYING in the main directory of this archive for |
8 | * more details. |
9 | * |
10 | * Some parts are based on David Boucher's viafb (http://davesdomain.org.uk/viafb/) |
11 | */ |
12 | |
13 | #include <linux/module.h> |
14 | #include <linux/kernel.h> |
15 | #include <linux/string.h> |
16 | #include <linux/fb.h> |
17 | #include <linux/svga.h> |
18 | #include <asm/types.h> |
19 | #include <asm/io.h> |
20 | |
21 | |
22 | /* Write a CRT register value spread across multiple registers */ |
23 | void svga_wcrt_multi(const struct vga_regset *regset, u32 value) { |
24 | |
25 | u8 regval, bitval, bitnum; |
26 | |
27 | while (regset->regnum != VGA_REGSET_END_VAL) { |
28 | regval = vga_rcrt(NULL, regset->regnum); |
29 | bitnum = regset->lowbit; |
30 | while (bitnum <= regset->highbit) { |
31 | bitval = 1 << bitnum; |
32 | regval = regval & ~bitval; |
33 | if (value & 1) regval = regval | bitval; |
34 | bitnum ++; |
35 | value = value >> 1; |
36 | } |
37 | vga_wcrt(NULL, regset->regnum, regval); |
38 | regset ++; |
39 | } |
40 | } |
41 | |
42 | /* Write a sequencer register value spread across multiple registers */ |
43 | void svga_wseq_multi(const struct vga_regset *regset, u32 value) { |
44 | |
45 | u8 regval, bitval, bitnum; |
46 | |
47 | while (regset->regnum != VGA_REGSET_END_VAL) { |
48 | regval = vga_rseq(NULL, regset->regnum); |
49 | bitnum = regset->lowbit; |
50 | while (bitnum <= regset->highbit) { |
51 | bitval = 1 << bitnum; |
52 | regval = regval & ~bitval; |
53 | if (value & 1) regval = regval | bitval; |
54 | bitnum ++; |
55 | value = value >> 1; |
56 | } |
57 | vga_wseq(NULL, regset->regnum, regval); |
58 | regset ++; |
59 | } |
60 | } |
61 | |
62 | static unsigned int svga_regset_size(const struct vga_regset *regset) |
63 | { |
64 | u8 count = 0; |
65 | |
66 | while (regset->regnum != VGA_REGSET_END_VAL) { |
67 | count += regset->highbit - regset->lowbit + 1; |
68 | regset ++; |
69 | } |
70 | return 1 << count; |
71 | } |
72 | |
73 | |
74 | /* ------------------------------------------------------------------------- */ |
75 | |
76 | |
77 | /* Set graphics controller registers to sane values */ |
78 | void svga_set_default_gfx_regs(void) |
79 | { |
80 | /* All standard GFX registers (GR00 - GR08) */ |
81 | vga_wgfx(NULL, VGA_GFX_SR_VALUE, 0x00); |
82 | vga_wgfx(NULL, VGA_GFX_SR_ENABLE, 0x00); |
83 | vga_wgfx(NULL, VGA_GFX_COMPARE_VALUE, 0x00); |
84 | vga_wgfx(NULL, VGA_GFX_DATA_ROTATE, 0x00); |
85 | vga_wgfx(NULL, VGA_GFX_PLANE_READ, 0x00); |
86 | vga_wgfx(NULL, VGA_GFX_MODE, 0x00); |
87 | /* vga_wgfx(NULL, VGA_GFX_MODE, 0x20); */ |
88 | /* vga_wgfx(NULL, VGA_GFX_MODE, 0x40); */ |
89 | vga_wgfx(NULL, VGA_GFX_MISC, 0x05); |
90 | /* vga_wgfx(NULL, VGA_GFX_MISC, 0x01); */ |
91 | vga_wgfx(NULL, VGA_GFX_COMPARE_MASK, 0x0F); |
92 | vga_wgfx(NULL, VGA_GFX_BIT_MASK, 0xFF); |
93 | } |
94 | |
95 | /* Set attribute controller registers to sane values */ |
96 | void svga_set_default_atc_regs(void) |
97 | { |
98 | u8 count; |
99 | |
100 | vga_r(NULL, 0x3DA); |
101 | vga_w(NULL, VGA_ATT_W, 0x00); |
102 | |
103 | /* All standard ATC registers (AR00 - AR14) */ |
104 | for (count = 0; count <= 0xF; count ++) |
105 | svga_wattr(count, count); |
106 | |
107 | svga_wattr(VGA_ATC_MODE, 0x01); |
108 | /* svga_wattr(VGA_ATC_MODE, 0x41); */ |
109 | svga_wattr(VGA_ATC_OVERSCAN, 0x00); |
110 | svga_wattr(VGA_ATC_PLANE_ENABLE, 0x0F); |
111 | svga_wattr(VGA_ATC_PEL, 0x00); |
112 | svga_wattr(VGA_ATC_COLOR_PAGE, 0x00); |
113 | |
114 | vga_r(NULL, 0x3DA); |
115 | vga_w(NULL, VGA_ATT_W, 0x20); |
116 | } |
117 | |
118 | /* Set sequencer registers to sane values */ |
119 | void svga_set_default_seq_regs(void) |
120 | { |
121 | /* Standard sequencer registers (SR01 - SR04), SR00 is not set */ |
122 | vga_wseq(NULL, VGA_SEQ_CLOCK_MODE, VGA_SR01_CHAR_CLK_8DOTS); |
123 | vga_wseq(NULL, VGA_SEQ_PLANE_WRITE, VGA_SR02_ALL_PLANES); |
124 | vga_wseq(NULL, VGA_SEQ_CHARACTER_MAP, 0x00); |
125 | /* vga_wseq(NULL, VGA_SEQ_MEMORY_MODE, VGA_SR04_EXT_MEM | VGA_SR04_SEQ_MODE | VGA_SR04_CHN_4M); */ |
126 | vga_wseq(NULL, VGA_SEQ_MEMORY_MODE, VGA_SR04_EXT_MEM | VGA_SR04_SEQ_MODE); |
127 | } |
128 | |
129 | /* Set CRTC registers to sane values */ |
130 | void svga_set_default_crt_regs(void) |
131 | { |
132 | /* Standard CRT registers CR03 CR08 CR09 CR14 CR17 */ |
133 | svga_wcrt_mask(0x03, 0x80, 0x80); /* Enable vertical retrace EVRA */ |
134 | vga_wcrt(NULL, VGA_CRTC_PRESET_ROW, 0); |
135 | svga_wcrt_mask(VGA_CRTC_MAX_SCAN, 0, 0x1F); |
136 | vga_wcrt(NULL, VGA_CRTC_UNDERLINE, 0); |
137 | vga_wcrt(NULL, VGA_CRTC_MODE, 0xE3); |
138 | } |
139 | |
140 | void svga_set_textmode_vga_regs(void) |
141 | { |
142 | /* svga_wseq_mask(0x1, 0x00, 0x01); */ /* Switch 8/9 pixel per char */ |
143 | vga_wseq(NULL, VGA_SEQ_MEMORY_MODE, VGA_SR04_EXT_MEM); |
144 | vga_wseq(NULL, VGA_SEQ_PLANE_WRITE, 0x03); |
145 | |
146 | vga_wcrt(NULL, VGA_CRTC_MAX_SCAN, 0x0f); /* 0x4f */ |
147 | vga_wcrt(NULL, VGA_CRTC_UNDERLINE, 0x1f); |
148 | svga_wcrt_mask(VGA_CRTC_MODE, 0x23, 0x7f); |
149 | |
150 | vga_wcrt(NULL, VGA_CRTC_CURSOR_START, 0x0d); |
151 | vga_wcrt(NULL, VGA_CRTC_CURSOR_END, 0x0e); |
152 | vga_wcrt(NULL, VGA_CRTC_CURSOR_HI, 0x00); |
153 | vga_wcrt(NULL, VGA_CRTC_CURSOR_LO, 0x00); |
154 | |
155 | vga_wgfx(NULL, VGA_GFX_MODE, 0x10); /* Odd/even memory mode */ |
156 | vga_wgfx(NULL, VGA_GFX_MISC, 0x0E); /* Misc graphics register - text mode enable */ |
157 | vga_wgfx(NULL, VGA_GFX_COMPARE_MASK, 0x00); |
158 | |
159 | vga_r(NULL, 0x3DA); |
160 | vga_w(NULL, VGA_ATT_W, 0x00); |
161 | |
162 | svga_wattr(0x10, 0x0C); /* Attribute Mode Control Register - text mode, blinking and line graphics */ |
163 | svga_wattr(0x13, 0x08); /* Horizontal Pixel Panning Register */ |
164 | |
165 | vga_r(NULL, 0x3DA); |
166 | vga_w(NULL, VGA_ATT_W, 0x20); |
167 | } |
168 | |
169 | #if 0 |
170 | void svga_dump_var(struct fb_var_screeninfo *var, int node) |
171 | { |
172 | pr_debug("fb%d: var.vmode : 0x%X\n", node, var->vmode); |
173 | pr_debug("fb%d: var.xres : %d\n", node, var->xres); |
174 | pr_debug("fb%d: var.yres : %d\n", node, var->yres); |
175 | pr_debug("fb%d: var.bits_per_pixel: %d\n", node, var->bits_per_pixel); |
176 | pr_debug("fb%d: var.xres_virtual : %d\n", node, var->xres_virtual); |
177 | pr_debug("fb%d: var.yres_virtual : %d\n", node, var->yres_virtual); |
178 | pr_debug("fb%d: var.left_margin : %d\n", node, var->left_margin); |
179 | pr_debug("fb%d: var.right_margin : %d\n", node, var->right_margin); |
180 | pr_debug("fb%d: var.upper_margin : %d\n", node, var->upper_margin); |
181 | pr_debug("fb%d: var.lower_margin : %d\n", node, var->lower_margin); |
182 | pr_debug("fb%d: var.hsync_len : %d\n", node, var->hsync_len); |
183 | pr_debug("fb%d: var.vsync_len : %d\n", node, var->vsync_len); |
184 | pr_debug("fb%d: var.sync : 0x%X\n", node, var->sync); |
185 | pr_debug("fb%d: var.pixclock : %d\n\n", node, var->pixclock); |
186 | } |
187 | #endif /* 0 */ |
188 | |
189 | |
190 | /* ------------------------------------------------------------------------- */ |
191 | |
192 | |
193 | void svga_settile(struct fb_info *info, struct fb_tilemap *map) |
194 | { |
195 | const u8 *font = map->data; |
196 | u8 __iomem *fb = (u8 __iomem *)info->screen_base; |
197 | int i, c; |
198 | |
199 | if ((map->width != 8) || (map->height != 16) || |
200 | (map->depth != 1) || (map->length != 256)) { |
201 | printk(KERN_ERR "fb%d: unsupported font parameters: width %d, height %d, depth %d, length %d\n", |
202 | info->node, map->width, map->height, map->depth, map->length); |
203 | return; |
204 | } |
205 | |
206 | fb += 2; |
207 | for (c = 0; c < map->length; c++) { |
208 | for (i = 0; i < map->height; i++) { |
209 | fb_writeb(font[i], fb + i * 4); |
210 | // fb[i * 4] = font[i]; |
211 | } |
212 | fb += 128; |
213 | font += map->height; |
214 | } |
215 | } |
216 | |
217 | /* Copy area in text (tileblit) mode */ |
218 | void svga_tilecopy(struct fb_info *info, struct fb_tilearea *area) |
219 | { |
220 | int dx, dy; |
221 | /* colstride is halved in this function because u16 are used */ |
222 | int colstride = 1 << (info->fix.type_aux & FB_AUX_TEXT_SVGA_MASK); |
223 | int rowstride = colstride * (info->var.xres_virtual / 8); |
224 | u16 __iomem *fb = (u16 __iomem *) info->screen_base; |
225 | u16 __iomem *src, *dst; |
226 | |
227 | if ((area->sy > area->dy) || |
228 | ((area->sy == area->dy) && (area->sx > area->dx))) { |
229 | src = fb + area->sx * colstride + area->sy * rowstride; |
230 | dst = fb + area->dx * colstride + area->dy * rowstride; |
231 | } else { |
232 | src = fb + (area->sx + area->width - 1) * colstride |
233 | + (area->sy + area->height - 1) * rowstride; |
234 | dst = fb + (area->dx + area->width - 1) * colstride |
235 | + (area->dy + area->height - 1) * rowstride; |
236 | |
237 | colstride = -colstride; |
238 | rowstride = -rowstride; |
239 | } |
240 | |
241 | for (dy = 0; dy < area->height; dy++) { |
242 | u16 __iomem *src2 = src; |
243 | u16 __iomem *dst2 = dst; |
244 | for (dx = 0; dx < area->width; dx++) { |
245 | fb_writew(fb_readw(src2), dst2); |
246 | // *dst2 = *src2; |
247 | src2 += colstride; |
248 | dst2 += colstride; |
249 | } |
250 | src += rowstride; |
251 | dst += rowstride; |
252 | } |
253 | } |
254 | |
255 | /* Fill area in text (tileblit) mode */ |
256 | void svga_tilefill(struct fb_info *info, struct fb_tilerect *rect) |
257 | { |
258 | int dx, dy; |
259 | int colstride = 2 << (info->fix.type_aux & FB_AUX_TEXT_SVGA_MASK); |
260 | int rowstride = colstride * (info->var.xres_virtual / 8); |
261 | int attr = (0x0F & rect->bg) << 4 | (0x0F & rect->fg); |
262 | u8 __iomem *fb = (u8 __iomem *)info->screen_base; |
263 | fb += rect->sx * colstride + rect->sy * rowstride; |
264 | |
265 | for (dy = 0; dy < rect->height; dy++) { |
266 | u8 __iomem *fb2 = fb; |
267 | for (dx = 0; dx < rect->width; dx++) { |
268 | fb_writeb(rect->index, fb2); |
269 | fb_writeb(attr, fb2 + 1); |
270 | fb2 += colstride; |
271 | } |
272 | fb += rowstride; |
273 | } |
274 | } |
275 | |
276 | /* Write text in text (tileblit) mode */ |
277 | void svga_tileblit(struct fb_info *info, struct fb_tileblit *blit) |
278 | { |
279 | int dx, dy, i; |
280 | int colstride = 2 << (info->fix.type_aux & FB_AUX_TEXT_SVGA_MASK); |
281 | int rowstride = colstride * (info->var.xres_virtual / 8); |
282 | int attr = (0x0F & blit->bg) << 4 | (0x0F & blit->fg); |
283 | u8 __iomem *fb = (u8 __iomem *)info->screen_base; |
284 | fb += blit->sx * colstride + blit->sy * rowstride; |
285 | |
286 | i=0; |
287 | for (dy=0; dy < blit->height; dy ++) { |
288 | u8 __iomem *fb2 = fb; |
289 | for (dx = 0; dx < blit->width; dx ++) { |
290 | fb_writeb(blit->indices[i], fb2); |
291 | fb_writeb(attr, fb2 + 1); |
292 | fb2 += colstride; |
293 | i ++; |
294 | if (i == blit->length) return; |
295 | } |
296 | fb += rowstride; |
297 | } |
298 | |
299 | } |
300 | |
301 | /* Set cursor in text (tileblit) mode */ |
302 | void svga_tilecursor(struct fb_info *info, struct fb_tilecursor *cursor) |
303 | { |
304 | u8 cs = 0x0d; |
305 | u8 ce = 0x0e; |
306 | u16 pos = cursor->sx + (info->var.xoffset / 8) |
307 | + (cursor->sy + (info->var.yoffset / 16)) |
308 | * (info->var.xres_virtual / 8); |
309 | |
310 | if (! cursor -> mode) |
311 | return; |
312 | |
313 | svga_wcrt_mask(0x0A, 0x20, 0x20); /* disable cursor */ |
314 | |
315 | if (cursor -> shape == FB_TILE_CURSOR_NONE) |
316 | return; |
317 | |
318 | switch (cursor -> shape) { |
319 | case FB_TILE_CURSOR_UNDERLINE: |
320 | cs = 0x0d; |
321 | break; |
322 | case FB_TILE_CURSOR_LOWER_THIRD: |
323 | cs = 0x09; |
324 | break; |
325 | case FB_TILE_CURSOR_LOWER_HALF: |
326 | cs = 0x07; |
327 | break; |
328 | case FB_TILE_CURSOR_TWO_THIRDS: |
329 | cs = 0x05; |
330 | break; |
331 | case FB_TILE_CURSOR_BLOCK: |
332 | cs = 0x01; |
333 | break; |
334 | } |
335 | |
336 | /* set cursor position */ |
337 | vga_wcrt(NULL, 0x0E, pos >> 8); |
338 | vga_wcrt(NULL, 0x0F, pos & 0xFF); |
339 | |
340 | vga_wcrt(NULL, 0x0B, ce); /* set cursor end */ |
341 | vga_wcrt(NULL, 0x0A, cs); /* set cursor start and enable it */ |
342 | } |
343 | |
344 | int svga_get_tilemax(struct fb_info *info) |
345 | { |
346 | return 256; |
347 | } |
348 | |
349 | /* Get capabilities of accelerator based on the mode */ |
350 | |
351 | void svga_get_caps(struct fb_info *info, struct fb_blit_caps *caps, |
352 | struct fb_var_screeninfo *var) |
353 | { |
354 | if (var->bits_per_pixel == 0) { |
355 | /* can only support 256 8x16 bitmap */ |
356 | caps->x = 1 << (8 - 1); |
357 | caps->y = 1 << (16 - 1); |
358 | caps->len = 256; |
359 | } else { |
360 | caps->x = (var->bits_per_pixel == 4) ? 1 << (8 - 1) : ~(u32)0; |
361 | caps->y = ~(u32)0; |
362 | caps->len = ~(u32)0; |
363 | } |
364 | } |
365 | EXPORT_SYMBOL(svga_get_caps); |
366 | |
367 | /* ------------------------------------------------------------------------- */ |
368 | |
369 | |
370 | /* |
371 | * Compute PLL settings (M, N, R) |
372 | * F_VCO = (F_BASE * M) / N |
373 | * F_OUT = F_VCO / (2^R) |
374 | */ |
375 | |
376 | static inline u32 abs_diff(u32 a, u32 b) |
377 | { |
378 | return (a > b) ? (a - b) : (b - a); |
379 | } |
380 | |
381 | int svga_compute_pll(const struct svga_pll *pll, u32 f_wanted, u16 *m, u16 *n, u16 *r, int node) |
382 | { |
383 | u16 am, an, ar; |
384 | u32 f_vco, f_current, delta_current, delta_best; |
385 | |
386 | pr_debug("fb%d: ideal frequency: %d kHz\n", node, (unsigned int) f_wanted); |
387 | |
388 | ar = pll->r_max; |
389 | f_vco = f_wanted << ar; |
390 | |
391 | /* overflow check */ |
392 | if ((f_vco >> ar) != f_wanted) |
393 | return -EINVAL; |
394 | |
395 | /* It is usually better to have greater VCO clock |
396 | because of better frequency stability. |
397 | So first try r_max, then r smaller. */ |
398 | while ((ar > pll->r_min) && (f_vco > pll->f_vco_max)) { |
399 | ar--; |
400 | f_vco = f_vco >> 1; |
401 | } |
402 | |
403 | /* VCO bounds check */ |
404 | if ((f_vco < pll->f_vco_min) || (f_vco > pll->f_vco_max)) |
405 | return -EINVAL; |
406 | |
407 | delta_best = 0xFFFFFFFF; |
408 | *m = 0; |
409 | *n = 0; |
410 | *r = ar; |
411 | |
412 | am = pll->m_min; |
413 | an = pll->n_min; |
414 | |
415 | while ((am <= pll->m_max) && (an <= pll->n_max)) { |
416 | f_current = (pll->f_base * am) / an; |
417 | delta_current = abs_diff (f_current, f_vco); |
418 | |
419 | if (delta_current < delta_best) { |
420 | delta_best = delta_current; |
421 | *m = am; |
422 | *n = an; |
423 | } |
424 | |
425 | if (f_current <= f_vco) { |
426 | am ++; |
427 | } else { |
428 | an ++; |
429 | } |
430 | } |
431 | |
432 | f_current = (pll->f_base * *m) / *n; |
433 | pr_debug("fb%d: found frequency: %d kHz (VCO %d kHz)\n", node, (int) (f_current >> ar), (int) f_current); |
434 | pr_debug("fb%d: m = %d n = %d r = %d\n", node, (unsigned int) *m, (unsigned int) *n, (unsigned int) *r); |
435 | return 0; |
436 | } |
437 | |
438 | |
439 | /* ------------------------------------------------------------------------- */ |
440 | |
441 | |
442 | /* Check CRT timing values */ |
443 | int svga_check_timings(const struct svga_timing_regs *tm, struct fb_var_screeninfo *var, int node) |
444 | { |
445 | u32 value; |
446 | |
447 | var->xres = (var->xres+7)&~7; |
448 | var->left_margin = (var->left_margin+7)&~7; |
449 | var->right_margin = (var->right_margin+7)&~7; |
450 | var->hsync_len = (var->hsync_len+7)&~7; |
451 | |
452 | /* Check horizontal total */ |
453 | value = var->xres + var->left_margin + var->right_margin + var->hsync_len; |
454 | if (((value / 8) - 5) >= svga_regset_size (tm->h_total_regs)) |
455 | return -EINVAL; |
456 | |
457 | /* Check horizontal display and blank start */ |
458 | value = var->xres; |
459 | if (((value / 8) - 1) >= svga_regset_size (tm->h_display_regs)) |
460 | return -EINVAL; |
461 | if (((value / 8) - 1) >= svga_regset_size (tm->h_blank_start_regs)) |
462 | return -EINVAL; |
463 | |
464 | /* Check horizontal sync start */ |
465 | value = var->xres + var->right_margin; |
466 | if (((value / 8) - 1) >= svga_regset_size (tm->h_sync_start_regs)) |
467 | return -EINVAL; |
468 | |
469 | /* Check horizontal blank end (or length) */ |
470 | value = var->left_margin + var->right_margin + var->hsync_len; |
471 | if ((value == 0) || ((value / 8) >= svga_regset_size (tm->h_blank_end_regs))) |
472 | return -EINVAL; |
473 | |
474 | /* Check horizontal sync end (or length) */ |
475 | value = var->hsync_len; |
476 | if ((value == 0) || ((value / 8) >= svga_regset_size (tm->h_sync_end_regs))) |
477 | return -EINVAL; |
478 | |
479 | /* Check vertical total */ |
480 | value = var->yres + var->upper_margin + var->lower_margin + var->vsync_len; |
481 | if ((value - 1) >= svga_regset_size(tm->v_total_regs)) |
482 | return -EINVAL; |
483 | |
484 | /* Check vertical display and blank start */ |
485 | value = var->yres; |
486 | if ((value - 1) >= svga_regset_size(tm->v_display_regs)) |
487 | return -EINVAL; |
488 | if ((value - 1) >= svga_regset_size(tm->v_blank_start_regs)) |
489 | return -EINVAL; |
490 | |
491 | /* Check vertical sync start */ |
492 | value = var->yres + var->lower_margin; |
493 | if ((value - 1) >= svga_regset_size(tm->v_sync_start_regs)) |
494 | return -EINVAL; |
495 | |
496 | /* Check vertical blank end (or length) */ |
497 | value = var->upper_margin + var->lower_margin + var->vsync_len; |
498 | if ((value == 0) || (value >= svga_regset_size (tm->v_blank_end_regs))) |
499 | return -EINVAL; |
500 | |
501 | /* Check vertical sync end (or length) */ |
502 | value = var->vsync_len; |
503 | if ((value == 0) || (value >= svga_regset_size (tm->v_sync_end_regs))) |
504 | return -EINVAL; |
505 | |
506 | return 0; |
507 | } |
508 | |
509 | /* Set CRT timing registers */ |
510 | void svga_set_timings(const struct svga_timing_regs *tm, struct fb_var_screeninfo *var, |
511 | u32 hmul, u32 hdiv, u32 vmul, u32 vdiv, u32 hborder, int node) |
512 | { |
513 | u8 regval; |
514 | u32 value; |
515 | |
516 | value = var->xres + var->left_margin + var->right_margin + var->hsync_len; |
517 | value = (value * hmul) / hdiv; |
518 | pr_debug("fb%d: horizontal total : %d\n", node, value); |
519 | svga_wcrt_multi(tm->h_total_regs, (value / 8) - 5); |
520 | |
521 | value = var->xres; |
522 | value = (value * hmul) / hdiv; |
523 | pr_debug("fb%d: horizontal display : %d\n", node, value); |
524 | svga_wcrt_multi(tm->h_display_regs, (value / 8) - 1); |
525 | |
526 | value = var->xres; |
527 | value = (value * hmul) / hdiv; |
528 | pr_debug("fb%d: horizontal blank start: %d\n", node, value); |
529 | svga_wcrt_multi(tm->h_blank_start_regs, (value / 8) - 1 + hborder); |
530 | |
531 | value = var->xres + var->left_margin + var->right_margin + var->hsync_len; |
532 | value = (value * hmul) / hdiv; |
533 | pr_debug("fb%d: horizontal blank end : %d\n", node, value); |
534 | svga_wcrt_multi(tm->h_blank_end_regs, (value / 8) - 1 - hborder); |
535 | |
536 | value = var->xres + var->right_margin; |
537 | value = (value * hmul) / hdiv; |
538 | pr_debug("fb%d: horizontal sync start : %d\n", node, value); |
539 | svga_wcrt_multi(tm->h_sync_start_regs, (value / 8)); |
540 | |
541 | value = var->xres + var->right_margin + var->hsync_len; |
542 | value = (value * hmul) / hdiv; |
543 | pr_debug("fb%d: horizontal sync end : %d\n", node, value); |
544 | svga_wcrt_multi(tm->h_sync_end_regs, (value / 8)); |
545 | |
546 | value = var->yres + var->upper_margin + var->lower_margin + var->vsync_len; |
547 | value = (value * vmul) / vdiv; |
548 | pr_debug("fb%d: vertical total : %d\n", node, value); |
549 | svga_wcrt_multi(tm->v_total_regs, value - 2); |
550 | |
551 | value = var->yres; |
552 | value = (value * vmul) / vdiv; |
553 | pr_debug("fb%d: vertical display : %d\n", node, value); |
554 | svga_wcrt_multi(tm->v_display_regs, value - 1); |
555 | |
556 | value = var->yres; |
557 | value = (value * vmul) / vdiv; |
558 | pr_debug("fb%d: vertical blank start : %d\n", node, value); |
559 | svga_wcrt_multi(tm->v_blank_start_regs, value); |
560 | |
561 | value = var->yres + var->upper_margin + var->lower_margin + var->vsync_len; |
562 | value = (value * vmul) / vdiv; |
563 | pr_debug("fb%d: vertical blank end : %d\n", node, value); |
564 | svga_wcrt_multi(tm->v_blank_end_regs, value - 2); |
565 | |
566 | value = var->yres + var->lower_margin; |
567 | value = (value * vmul) / vdiv; |
568 | pr_debug("fb%d: vertical sync start : %d\n", node, value); |
569 | svga_wcrt_multi(tm->v_sync_start_regs, value); |
570 | |
571 | value = var->yres + var->lower_margin + var->vsync_len; |
572 | value = (value * vmul) / vdiv; |
573 | pr_debug("fb%d: vertical sync end : %d\n", node, value); |
574 | svga_wcrt_multi(tm->v_sync_end_regs, value); |
575 | |
576 | /* Set horizontal and vertical sync pulse polarity in misc register */ |
577 | |
578 | regval = vga_r(NULL, VGA_MIS_R); |
579 | if (var->sync & FB_SYNC_HOR_HIGH_ACT) { |
580 | pr_debug("fb%d: positive horizontal sync\n", node); |
581 | regval = regval & ~0x80; |
582 | } else { |
583 | pr_debug("fb%d: negative horizontal sync\n", node); |
584 | regval = regval | 0x80; |
585 | } |
586 | if (var->sync & FB_SYNC_VERT_HIGH_ACT) { |
587 | pr_debug("fb%d: positive vertical sync\n", node); |
588 | regval = regval & ~0x40; |
589 | } else { |
590 | pr_debug("fb%d: negative vertical sync\n\n", node); |
591 | regval = regval | 0x40; |
592 | } |
593 | vga_w(NULL, VGA_MIS_W, regval); |
594 | } |
595 | |
596 | |
597 | /* ------------------------------------------------------------------------- */ |
598 | |
599 | |
600 | static inline int match_format(const struct svga_fb_format *frm, |
601 | struct fb_var_screeninfo *var) |
602 | { |
603 | int i = 0; |
604 | int stored = -EINVAL; |
605 | |
606 | while (frm->bits_per_pixel != SVGA_FORMAT_END_VAL) |
607 | { |
608 | if ((var->bits_per_pixel == frm->bits_per_pixel) && |
609 | (var->red.length <= frm->red.length) && |
610 | (var->green.length <= frm->green.length) && |
611 | (var->blue.length <= frm->blue.length) && |
612 | (var->transp.length <= frm->transp.length) && |
613 | (var->nonstd == frm->nonstd)) |
614 | return i; |
615 | if (var->bits_per_pixel == frm->bits_per_pixel) |
616 | stored = i; |
617 | i++; |
618 | frm++; |
619 | } |
620 | return stored; |
621 | } |
622 | |
623 | int svga_match_format(const struct svga_fb_format *frm, |
624 | struct fb_var_screeninfo *var, |
625 | struct fb_fix_screeninfo *fix) |
626 | { |
627 | int i = match_format(frm, var); |
628 | |
629 | if (i >= 0) { |
630 | var->bits_per_pixel = frm[i].bits_per_pixel; |
631 | var->red = frm[i].red; |
632 | var->green = frm[i].green; |
633 | var->blue = frm[i].blue; |
634 | var->transp = frm[i].transp; |
635 | var->nonstd = frm[i].nonstd; |
636 | if (fix != NULL) { |
637 | fix->type = frm[i].type; |
638 | fix->type_aux = frm[i].type_aux; |
639 | fix->visual = frm[i].visual; |
640 | fix->xpanstep = frm[i].xpanstep; |
641 | } |
642 | } |
643 | |
644 | return i; |
645 | } |
646 | |
647 | |
648 | EXPORT_SYMBOL(svga_wcrt_multi); |
649 | EXPORT_SYMBOL(svga_wseq_multi); |
650 | |
651 | EXPORT_SYMBOL(svga_set_default_gfx_regs); |
652 | EXPORT_SYMBOL(svga_set_default_atc_regs); |
653 | EXPORT_SYMBOL(svga_set_default_seq_regs); |
654 | EXPORT_SYMBOL(svga_set_default_crt_regs); |
655 | EXPORT_SYMBOL(svga_set_textmode_vga_regs); |
656 | |
657 | EXPORT_SYMBOL(svga_settile); |
658 | EXPORT_SYMBOL(svga_tilecopy); |
659 | EXPORT_SYMBOL(svga_tilefill); |
660 | EXPORT_SYMBOL(svga_tileblit); |
661 | EXPORT_SYMBOL(svga_tilecursor); |
662 | EXPORT_SYMBOL(svga_get_tilemax); |
663 | |
664 | EXPORT_SYMBOL(svga_compute_pll); |
665 | EXPORT_SYMBOL(svga_check_timings); |
666 | EXPORT_SYMBOL(svga_set_timings); |
667 | EXPORT_SYMBOL(svga_match_format); |
668 | |
669 | MODULE_AUTHOR("Ondrej Zajicek <santiago@crfreenet.org>"); |
670 | MODULE_DESCRIPTION("Common utility functions for VGA-based graphics cards"); |
671 | MODULE_LICENSE("GPL"); |
672 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
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v3.9