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1da177e4 LT |
1 | /* |
2 | * linux/drivers/video/vga16.c -- VGA 16-color framebuffer driver | |
3 | * | |
4 | * Copyright 1999 Ben Pfaff <pfaffben@debian.org> and Petr Vandrovec <VANDROVE@vc.cvut.cz> | |
5 | * Based on VGA info at http://www.goodnet.com/~tinara/FreeVGA/home.htm | |
6 | * Based on VESA framebuffer (c) 1998 Gerd Knorr <kraxel@goldbach.in-berlin.de> | |
7 | * | |
8 | * This file is subject to the terms and conditions of the GNU General | |
9 | * Public License. See the file COPYING in the main directory of this | |
10 | * archive for more details. | |
11 | */ | |
12 | ||
13 | #include <linux/module.h> | |
14 | #include <linux/kernel.h> | |
15 | #include <linux/errno.h> | |
16 | #include <linux/string.h> | |
17 | #include <linux/mm.h> | |
1da177e4 LT |
18 | #include <linux/delay.h> |
19 | #include <linux/fb.h> | |
20 | #include <linux/ioport.h> | |
21 | #include <linux/init.h> | |
120ddb41 | 22 | #include <linux/platform_device.h> |
a8f340e3 | 23 | #include <linux/screen_info.h> |
1da177e4 LT |
24 | |
25 | #include <asm/io.h> | |
26 | #include <video/vga.h> | |
27 | ||
1da177e4 LT |
28 | #define VGA_FB_PHYS 0xA0000 |
29 | #define VGA_FB_PHYS_LEN 65536 | |
30 | ||
31 | #define MODE_SKIP4 1 | |
32 | #define MODE_8BPP 2 | |
33 | #define MODE_CFB 4 | |
34 | #define MODE_TEXT 8 | |
35 | ||
36 | /* --------------------------------------------------------------------- */ | |
37 | ||
38 | /* | |
39 | * card parameters | |
40 | */ | |
41 | ||
120ddb41 | 42 | struct vga16fb_par { |
1da177e4 LT |
43 | /* structure holding original VGA register settings when the |
44 | screen is blanked */ | |
45 | struct { | |
120ddb41 AD |
46 | unsigned char SeqCtrlIndex; /* Sequencer Index reg. */ |
47 | unsigned char CrtCtrlIndex; /* CRT-Contr. Index reg. */ | |
48 | unsigned char CrtMiscIO; /* Miscellaneous register */ | |
49 | unsigned char HorizontalTotal; /* CRT-Controller:00h */ | |
50 | unsigned char HorizDisplayEnd; /* CRT-Controller:01h */ | |
51 | unsigned char StartHorizRetrace;/* CRT-Controller:04h */ | |
52 | unsigned char EndHorizRetrace; /* CRT-Controller:05h */ | |
53 | unsigned char Overflow; /* CRT-Controller:07h */ | |
54 | unsigned char StartVertRetrace; /* CRT-Controller:10h */ | |
55 | unsigned char EndVertRetrace; /* CRT-Controller:11h */ | |
56 | unsigned char ModeControl; /* CRT-Controller:17h */ | |
57 | unsigned char ClockingMode; /* Seq-Controller:01h */ | |
1da177e4 LT |
58 | } vga_state; |
59 | struct vgastate state; | |
c4f28e54 | 60 | unsigned int ref_count; |
1da177e4 LT |
61 | int palette_blanked, vesa_blanked, mode, isVGA; |
62 | u8 misc, pel_msk, vss, clkdiv; | |
63 | u8 crtc[VGA_CRT_C]; | |
120ddb41 | 64 | }; |
1da177e4 LT |
65 | |
66 | /* --------------------------------------------------------------------- */ | |
67 | ||
ad145846 | 68 | static struct fb_var_screeninfo vga16fb_defined __devinitdata = { |
1da177e4 LT |
69 | .xres = 640, |
70 | .yres = 480, | |
71 | .xres_virtual = 640, | |
72 | .yres_virtual = 480, | |
73 | .bits_per_pixel = 4, | |
74 | .activate = FB_ACTIVATE_TEST, | |
75 | .height = -1, | |
76 | .width = -1, | |
77 | .pixclock = 39721, | |
78 | .left_margin = 48, | |
79 | .right_margin = 16, | |
80 | .upper_margin = 33, | |
81 | .lower_margin = 10, | |
82 | .hsync_len = 96, | |
83 | .vsync_len = 2, | |
84 | .vmode = FB_VMODE_NONINTERLACED, | |
85 | }; | |
86 | ||
87 | /* name should not depend on EGA/VGA */ | |
ad145846 | 88 | static struct fb_fix_screeninfo vga16fb_fix __devinitdata = { |
1da177e4 LT |
89 | .id = "VGA16 VGA", |
90 | .smem_start = VGA_FB_PHYS, | |
91 | .smem_len = VGA_FB_PHYS_LEN, | |
92 | .type = FB_TYPE_VGA_PLANES, | |
93 | .type_aux = FB_AUX_VGA_PLANES_VGA4, | |
94 | .visual = FB_VISUAL_PSEUDOCOLOR, | |
95 | .xpanstep = 8, | |
96 | .ypanstep = 1, | |
98219374 | 97 | .line_length = 640 / 8, |
1da177e4 LT |
98 | .accel = FB_ACCEL_NONE |
99 | }; | |
100 | ||
101 | /* The VGA's weird architecture often requires that we read a byte and | |
102 | write a byte to the same location. It doesn't matter *what* byte | |
103 | we write, however. This is because all the action goes on behind | |
104 | the scenes in the VGA's 32-bit latch register, and reading and writing | |
105 | video memory just invokes latch behavior. | |
106 | ||
107 | To avoid race conditions (is this necessary?), reading and writing | |
108 | the memory byte should be done with a single instruction. One | |
109 | suitable instruction is the x86 bitwise OR. The following | |
110 | read-modify-write routine should optimize to one such bitwise | |
111 | OR. */ | |
112 | static inline void rmw(volatile char __iomem *p) | |
113 | { | |
114 | readb(p); | |
115 | writeb(1, p); | |
116 | } | |
117 | ||
118 | /* Set the Graphics Mode Register, and return its previous value. | |
119 | Bits 0-1 are write mode, bit 3 is read mode. */ | |
120 | static inline int setmode(int mode) | |
121 | { | |
122 | int oldmode; | |
123 | ||
98219374 KH |
124 | oldmode = vga_io_rgfx(VGA_GFX_MODE); |
125 | vga_io_w(VGA_GFX_D, mode); | |
1da177e4 LT |
126 | return oldmode; |
127 | } | |
128 | ||
129 | /* Select the Bit Mask Register and return its value. */ | |
130 | static inline int selectmask(void) | |
131 | { | |
98219374 | 132 | return vga_io_rgfx(VGA_GFX_BIT_MASK); |
1da177e4 LT |
133 | } |
134 | ||
135 | /* Set the value of the Bit Mask Register. It must already have been | |
136 | selected with selectmask(). */ | |
137 | static inline void setmask(int mask) | |
138 | { | |
98219374 | 139 | vga_io_w(VGA_GFX_D, mask); |
1da177e4 LT |
140 | } |
141 | ||
142 | /* Set the Data Rotate Register and return its old value. | |
143 | Bits 0-2 are rotate count, bits 3-4 are logical operation | |
144 | (0=NOP, 1=AND, 2=OR, 3=XOR). */ | |
145 | static inline int setop(int op) | |
146 | { | |
147 | int oldop; | |
148 | ||
98219374 KH |
149 | oldop = vga_io_rgfx(VGA_GFX_DATA_ROTATE); |
150 | vga_io_w(VGA_GFX_D, op); | |
1da177e4 LT |
151 | return oldop; |
152 | } | |
153 | ||
154 | /* Set the Enable Set/Reset Register and return its old value. | |
25985edc | 155 | The code here always uses value 0xf for this register. */ |
1da177e4 LT |
156 | static inline int setsr(int sr) |
157 | { | |
158 | int oldsr; | |
159 | ||
98219374 KH |
160 | oldsr = vga_io_rgfx(VGA_GFX_SR_ENABLE); |
161 | vga_io_w(VGA_GFX_D, sr); | |
1da177e4 LT |
162 | return oldsr; |
163 | } | |
164 | ||
165 | /* Set the Set/Reset Register and return its old value. */ | |
166 | static inline int setcolor(int color) | |
167 | { | |
168 | int oldcolor; | |
169 | ||
98219374 KH |
170 | oldcolor = vga_io_rgfx(VGA_GFX_SR_VALUE); |
171 | vga_io_w(VGA_GFX_D, color); | |
1da177e4 LT |
172 | return oldcolor; |
173 | } | |
174 | ||
175 | /* Return the value in the Graphics Address Register. */ | |
176 | static inline int getindex(void) | |
177 | { | |
98219374 | 178 | return vga_io_r(VGA_GFX_I); |
1da177e4 LT |
179 | } |
180 | ||
181 | /* Set the value in the Graphics Address Register. */ | |
182 | static inline void setindex(int index) | |
183 | { | |
98219374 | 184 | vga_io_w(VGA_GFX_I, index); |
1da177e4 LT |
185 | } |
186 | ||
187 | static void vga16fb_pan_var(struct fb_info *info, | |
188 | struct fb_var_screeninfo *var) | |
189 | { | |
120ddb41 | 190 | struct vga16fb_par *par = info->par; |
1da177e4 LT |
191 | u32 xoffset, pos; |
192 | ||
193 | xoffset = var->xoffset; | |
194 | if (info->var.bits_per_pixel == 8) { | |
195 | pos = (info->var.xres_virtual * var->yoffset + xoffset) >> 2; | |
196 | } else if (par->mode & MODE_TEXT) { | |
197 | int fh = 16; // FIXME !!! font height. Fugde for now. | |
198 | pos = (info->var.xres_virtual * (var->yoffset / fh) + xoffset) >> 3; | |
199 | } else { | |
200 | if (info->var.nonstd) | |
201 | xoffset--; | |
202 | pos = (info->var.xres_virtual * var->yoffset + xoffset) >> 3; | |
203 | } | |
204 | vga_io_wcrt(VGA_CRTC_START_HI, pos >> 8); | |
205 | vga_io_wcrt(VGA_CRTC_START_LO, pos & 0xFF); | |
206 | /* if we support CFB4, then we must! support xoffset with pixel | |
207 | * granularity if someone supports xoffset in bit resolution */ | |
208 | vga_io_r(VGA_IS1_RC); /* reset flip-flop */ | |
209 | vga_io_w(VGA_ATT_IW, VGA_ATC_PEL); | |
c272d641 | 210 | if (info->var.bits_per_pixel == 8) |
1da177e4 LT |
211 | vga_io_w(VGA_ATT_IW, (xoffset & 3) << 1); |
212 | else | |
213 | vga_io_w(VGA_ATT_IW, xoffset & 7); | |
214 | vga_io_r(VGA_IS1_RC); | |
215 | vga_io_w(VGA_ATT_IW, 0x20); | |
216 | } | |
217 | ||
218 | static void vga16fb_update_fix(struct fb_info *info) | |
219 | { | |
220 | if (info->var.bits_per_pixel == 4) { | |
221 | if (info->var.nonstd) { | |
222 | info->fix.type = FB_TYPE_PACKED_PIXELS; | |
223 | info->fix.line_length = info->var.xres_virtual / 2; | |
224 | } else { | |
225 | info->fix.type = FB_TYPE_VGA_PLANES; | |
226 | info->fix.type_aux = FB_AUX_VGA_PLANES_VGA4; | |
227 | info->fix.line_length = info->var.xres_virtual / 8; | |
228 | } | |
229 | } else if (info->var.bits_per_pixel == 0) { | |
230 | info->fix.type = FB_TYPE_TEXT; | |
231 | info->fix.type_aux = FB_AUX_TEXT_CGA; | |
232 | info->fix.line_length = info->var.xres_virtual / 4; | |
233 | } else { /* 8bpp */ | |
234 | if (info->var.nonstd) { | |
235 | info->fix.type = FB_TYPE_VGA_PLANES; | |
236 | info->fix.type_aux = FB_AUX_VGA_PLANES_CFB8; | |
237 | info->fix.line_length = info->var.xres_virtual / 4; | |
238 | } else { | |
239 | info->fix.type = FB_TYPE_PACKED_PIXELS; | |
240 | info->fix.line_length = info->var.xres_virtual; | |
241 | } | |
242 | } | |
243 | } | |
244 | ||
245 | static void vga16fb_clock_chip(struct vga16fb_par *par, | |
246 | unsigned int pixclock, | |
247 | const struct fb_info *info, | |
248 | int mul, int div) | |
249 | { | |
ec1a7b3d | 250 | static const struct { |
1da177e4 LT |
251 | u32 pixclock; |
252 | u8 misc; | |
253 | u8 seq_clock_mode; | |
254 | } *ptr, *best, vgaclocks[] = { | |
255 | { 79442 /* 12.587 */, 0x00, 0x08}, | |
256 | { 70616 /* 14.161 */, 0x04, 0x08}, | |
257 | { 39721 /* 25.175 */, 0x00, 0x00}, | |
258 | { 35308 /* 28.322 */, 0x04, 0x00}, | |
259 | { 0 /* bad */, 0x00, 0x00}}; | |
260 | int err; | |
261 | ||
262 | pixclock = (pixclock * mul) / div; | |
263 | best = vgaclocks; | |
264 | err = pixclock - best->pixclock; | |
265 | if (err < 0) err = -err; | |
266 | for (ptr = vgaclocks + 1; ptr->pixclock; ptr++) { | |
267 | int tmp; | |
268 | ||
269 | tmp = pixclock - ptr->pixclock; | |
270 | if (tmp < 0) tmp = -tmp; | |
271 | if (tmp < err) { | |
272 | err = tmp; | |
273 | best = ptr; | |
274 | } | |
275 | } | |
276 | par->misc |= best->misc; | |
277 | par->clkdiv = best->seq_clock_mode; | |
278 | pixclock = (best->pixclock * div) / mul; | |
279 | } | |
280 | ||
281 | #define FAIL(X) return -EINVAL | |
282 | ||
283 | static int vga16fb_open(struct fb_info *info, int user) | |
284 | { | |
120ddb41 | 285 | struct vga16fb_par *par = info->par; |
1da177e4 | 286 | |
c4f28e54 | 287 | if (!par->ref_count) { |
1da177e4 LT |
288 | memset(&par->state, 0, sizeof(struct vgastate)); |
289 | par->state.flags = VGA_SAVE_FONTS | VGA_SAVE_MODE | | |
290 | VGA_SAVE_CMAP; | |
291 | save_vga(&par->state); | |
292 | } | |
c4f28e54 | 293 | par->ref_count++; |
c4f28e54 | 294 | |
1da177e4 LT |
295 | return 0; |
296 | } | |
297 | ||
298 | static int vga16fb_release(struct fb_info *info, int user) | |
299 | { | |
120ddb41 | 300 | struct vga16fb_par *par = info->par; |
1da177e4 | 301 | |
9c8db4a2 | 302 | if (!par->ref_count) |
1da177e4 | 303 | return -EINVAL; |
9c8db4a2 | 304 | |
c4f28e54 | 305 | if (par->ref_count == 1) |
1da177e4 | 306 | restore_vga(&par->state); |
c4f28e54 | 307 | par->ref_count--; |
1da177e4 LT |
308 | |
309 | return 0; | |
310 | } | |
311 | ||
312 | static int vga16fb_check_var(struct fb_var_screeninfo *var, | |
313 | struct fb_info *info) | |
314 | { | |
120ddb41 | 315 | struct vga16fb_par *par = info->par; |
1da177e4 LT |
316 | u32 xres, right, hslen, left, xtotal; |
317 | u32 yres, lower, vslen, upper, ytotal; | |
318 | u32 vxres, xoffset, vyres, yoffset; | |
319 | u32 pos; | |
320 | u8 r7, rMode; | |
321 | int shift; | |
322 | int mode; | |
323 | u32 maxmem; | |
324 | ||
325 | par->pel_msk = 0xFF; | |
326 | ||
327 | if (var->bits_per_pixel == 4) { | |
328 | if (var->nonstd) { | |
329 | if (!par->isVGA) | |
330 | return -EINVAL; | |
331 | shift = 3; | |
332 | mode = MODE_SKIP4 | MODE_CFB; | |
333 | maxmem = 16384; | |
334 | par->pel_msk = 0x0F; | |
335 | } else { | |
336 | shift = 3; | |
337 | mode = 0; | |
338 | maxmem = 65536; | |
339 | } | |
340 | } else if (var->bits_per_pixel == 8) { | |
341 | if (!par->isVGA) | |
342 | return -EINVAL; /* no support on EGA */ | |
343 | shift = 2; | |
344 | if (var->nonstd) { | |
345 | mode = MODE_8BPP | MODE_CFB; | |
346 | maxmem = 65536; | |
347 | } else { | |
348 | mode = MODE_SKIP4 | MODE_8BPP | MODE_CFB; | |
349 | maxmem = 16384; | |
350 | } | |
351 | } else | |
352 | return -EINVAL; | |
353 | ||
354 | xres = (var->xres + 7) & ~7; | |
355 | vxres = (var->xres_virtual + 0xF) & ~0xF; | |
356 | xoffset = (var->xoffset + 7) & ~7; | |
357 | left = (var->left_margin + 7) & ~7; | |
358 | right = (var->right_margin + 7) & ~7; | |
359 | hslen = (var->hsync_len + 7) & ~7; | |
360 | ||
361 | if (vxres < xres) | |
362 | vxres = xres; | |
363 | if (xres + xoffset > vxres) | |
364 | xoffset = vxres - xres; | |
365 | ||
366 | var->xres = xres; | |
367 | var->right_margin = right; | |
368 | var->hsync_len = hslen; | |
369 | var->left_margin = left; | |
370 | var->xres_virtual = vxres; | |
371 | var->xoffset = xoffset; | |
372 | ||
373 | xres >>= shift; | |
374 | right >>= shift; | |
375 | hslen >>= shift; | |
376 | left >>= shift; | |
377 | vxres >>= shift; | |
378 | xtotal = xres + right + hslen + left; | |
379 | if (xtotal >= 256) | |
380 | FAIL("xtotal too big"); | |
381 | if (hslen > 32) | |
382 | FAIL("hslen too big"); | |
383 | if (right + hslen + left > 64) | |
384 | FAIL("hblank too big"); | |
385 | par->crtc[VGA_CRTC_H_TOTAL] = xtotal - 5; | |
386 | par->crtc[VGA_CRTC_H_BLANK_START] = xres - 1; | |
387 | par->crtc[VGA_CRTC_H_DISP] = xres - 1; | |
388 | pos = xres + right; | |
389 | par->crtc[VGA_CRTC_H_SYNC_START] = pos; | |
390 | pos += hslen; | |
391 | par->crtc[VGA_CRTC_H_SYNC_END] = pos & 0x1F; | |
392 | pos += left - 2; /* blank_end + 2 <= total + 5 */ | |
393 | par->crtc[VGA_CRTC_H_BLANK_END] = (pos & 0x1F) | 0x80; | |
394 | if (pos & 0x20) | |
395 | par->crtc[VGA_CRTC_H_SYNC_END] |= 0x80; | |
396 | ||
397 | yres = var->yres; | |
398 | lower = var->lower_margin; | |
399 | vslen = var->vsync_len; | |
400 | upper = var->upper_margin; | |
401 | vyres = var->yres_virtual; | |
402 | yoffset = var->yoffset; | |
403 | ||
404 | if (yres > vyres) | |
405 | vyres = yres; | |
406 | if (vxres * vyres > maxmem) { | |
407 | vyres = maxmem / vxres; | |
408 | if (vyres < yres) | |
409 | return -ENOMEM; | |
410 | } | |
411 | if (yoffset + yres > vyres) | |
412 | yoffset = vyres - yres; | |
413 | var->yres = yres; | |
414 | var->lower_margin = lower; | |
415 | var->vsync_len = vslen; | |
416 | var->upper_margin = upper; | |
417 | var->yres_virtual = vyres; | |
418 | var->yoffset = yoffset; | |
419 | ||
420 | if (var->vmode & FB_VMODE_DOUBLE) { | |
421 | yres <<= 1; | |
422 | lower <<= 1; | |
423 | vslen <<= 1; | |
424 | upper <<= 1; | |
425 | } | |
426 | ytotal = yres + lower + vslen + upper; | |
427 | if (ytotal > 1024) { | |
428 | ytotal >>= 1; | |
429 | yres >>= 1; | |
430 | lower >>= 1; | |
431 | vslen >>= 1; | |
432 | upper >>= 1; | |
433 | rMode = 0x04; | |
434 | } else | |
435 | rMode = 0x00; | |
436 | if (ytotal > 1024) | |
437 | FAIL("ytotal too big"); | |
438 | if (vslen > 16) | |
439 | FAIL("vslen too big"); | |
440 | par->crtc[VGA_CRTC_V_TOTAL] = ytotal - 2; | |
441 | r7 = 0x10; /* disable linecompare */ | |
442 | if (ytotal & 0x100) r7 |= 0x01; | |
443 | if (ytotal & 0x200) r7 |= 0x20; | |
444 | par->crtc[VGA_CRTC_PRESET_ROW] = 0; | |
445 | par->crtc[VGA_CRTC_MAX_SCAN] = 0x40; /* 1 scanline, no linecmp */ | |
446 | if (var->vmode & FB_VMODE_DOUBLE) | |
447 | par->crtc[VGA_CRTC_MAX_SCAN] |= 0x80; | |
448 | par->crtc[VGA_CRTC_CURSOR_START] = 0x20; | |
449 | par->crtc[VGA_CRTC_CURSOR_END] = 0x00; | |
450 | if ((mode & (MODE_CFB | MODE_8BPP)) == MODE_CFB) | |
451 | xoffset--; | |
452 | pos = yoffset * vxres + (xoffset >> shift); | |
453 | par->crtc[VGA_CRTC_START_HI] = pos >> 8; | |
454 | par->crtc[VGA_CRTC_START_LO] = pos & 0xFF; | |
455 | par->crtc[VGA_CRTC_CURSOR_HI] = 0x00; | |
456 | par->crtc[VGA_CRTC_CURSOR_LO] = 0x00; | |
457 | pos = yres - 1; | |
458 | par->crtc[VGA_CRTC_V_DISP_END] = pos & 0xFF; | |
459 | par->crtc[VGA_CRTC_V_BLANK_START] = pos & 0xFF; | |
460 | if (pos & 0x100) | |
461 | r7 |= 0x0A; /* 0x02 -> DISP_END, 0x08 -> BLANK_START */ | |
462 | if (pos & 0x200) { | |
463 | r7 |= 0x40; /* 0x40 -> DISP_END */ | |
464 | par->crtc[VGA_CRTC_MAX_SCAN] |= 0x20; /* BLANK_START */ | |
465 | } | |
466 | pos += lower; | |
467 | par->crtc[VGA_CRTC_V_SYNC_START] = pos & 0xFF; | |
468 | if (pos & 0x100) | |
469 | r7 |= 0x04; | |
470 | if (pos & 0x200) | |
471 | r7 |= 0x80; | |
472 | pos += vslen; | |
473 | par->crtc[VGA_CRTC_V_SYNC_END] = (pos & 0x0F) & ~0x10; /* disabled IRQ */ | |
474 | pos += upper - 1; /* blank_end + 1 <= ytotal + 2 */ | |
475 | par->crtc[VGA_CRTC_V_BLANK_END] = pos & 0xFF; /* 0x7F for original VGA, | |
476 | but some SVGA chips requires all 8 bits to set */ | |
477 | if (vxres >= 512) | |
478 | FAIL("vxres too long"); | |
479 | par->crtc[VGA_CRTC_OFFSET] = vxres >> 1; | |
480 | if (mode & MODE_SKIP4) | |
481 | par->crtc[VGA_CRTC_UNDERLINE] = 0x5F; /* 256, cfb8 */ | |
482 | else | |
483 | par->crtc[VGA_CRTC_UNDERLINE] = 0x1F; /* 16, vgap */ | |
484 | par->crtc[VGA_CRTC_MODE] = rMode | ((mode & MODE_TEXT) ? 0xA3 : 0xE3); | |
485 | par->crtc[VGA_CRTC_LINE_COMPARE] = 0xFF; | |
486 | par->crtc[VGA_CRTC_OVERFLOW] = r7; | |
487 | ||
488 | par->vss = 0x00; /* 3DA */ | |
489 | ||
490 | par->misc = 0xE3; /* enable CPU, ports 0x3Dx, positive sync */ | |
491 | if (var->sync & FB_SYNC_HOR_HIGH_ACT) | |
492 | par->misc &= ~0x40; | |
493 | if (var->sync & FB_SYNC_VERT_HIGH_ACT) | |
494 | par->misc &= ~0x80; | |
495 | ||
496 | par->mode = mode; | |
497 | ||
498 | if (mode & MODE_8BPP) | |
499 | /* pixel clock == vga clock / 2 */ | |
500 | vga16fb_clock_chip(par, var->pixclock, info, 1, 2); | |
501 | else | |
502 | /* pixel clock == vga clock */ | |
503 | vga16fb_clock_chip(par, var->pixclock, info, 1, 1); | |
504 | ||
505 | var->red.offset = var->green.offset = var->blue.offset = | |
506 | var->transp.offset = 0; | |
507 | var->red.length = var->green.length = var->blue.length = | |
508 | (par->isVGA) ? 6 : 2; | |
509 | var->transp.length = 0; | |
510 | var->activate = FB_ACTIVATE_NOW; | |
511 | var->height = -1; | |
512 | var->width = -1; | |
513 | var->accel_flags = 0; | |
514 | return 0; | |
515 | } | |
516 | #undef FAIL | |
517 | ||
518 | static int vga16fb_set_par(struct fb_info *info) | |
519 | { | |
120ddb41 | 520 | struct vga16fb_par *par = info->par; |
1da177e4 LT |
521 | u8 gdc[VGA_GFX_C]; |
522 | u8 seq[VGA_SEQ_C]; | |
523 | u8 atc[VGA_ATT_C]; | |
524 | int fh, i; | |
525 | ||
526 | seq[VGA_SEQ_CLOCK_MODE] = 0x01 | par->clkdiv; | |
527 | if (par->mode & MODE_TEXT) | |
528 | seq[VGA_SEQ_PLANE_WRITE] = 0x03; | |
529 | else | |
530 | seq[VGA_SEQ_PLANE_WRITE] = 0x0F; | |
531 | seq[VGA_SEQ_CHARACTER_MAP] = 0x00; | |
532 | if (par->mode & MODE_TEXT) | |
533 | seq[VGA_SEQ_MEMORY_MODE] = 0x03; | |
534 | else if (par->mode & MODE_SKIP4) | |
535 | seq[VGA_SEQ_MEMORY_MODE] = 0x0E; | |
536 | else | |
537 | seq[VGA_SEQ_MEMORY_MODE] = 0x06; | |
538 | ||
539 | gdc[VGA_GFX_SR_VALUE] = 0x00; | |
540 | gdc[VGA_GFX_SR_ENABLE] = 0x00; | |
541 | gdc[VGA_GFX_COMPARE_VALUE] = 0x00; | |
542 | gdc[VGA_GFX_DATA_ROTATE] = 0x00; | |
543 | gdc[VGA_GFX_PLANE_READ] = 0; | |
544 | if (par->mode & MODE_TEXT) { | |
545 | gdc[VGA_GFX_MODE] = 0x10; | |
546 | gdc[VGA_GFX_MISC] = 0x06; | |
547 | } else { | |
548 | if (par->mode & MODE_CFB) | |
549 | gdc[VGA_GFX_MODE] = 0x40; | |
550 | else | |
551 | gdc[VGA_GFX_MODE] = 0x00; | |
552 | gdc[VGA_GFX_MISC] = 0x05; | |
553 | } | |
554 | gdc[VGA_GFX_COMPARE_MASK] = 0x0F; | |
555 | gdc[VGA_GFX_BIT_MASK] = 0xFF; | |
556 | ||
557 | for (i = 0x00; i < 0x10; i++) | |
558 | atc[i] = i; | |
559 | if (par->mode & MODE_TEXT) | |
560 | atc[VGA_ATC_MODE] = 0x04; | |
561 | else if (par->mode & MODE_8BPP) | |
562 | atc[VGA_ATC_MODE] = 0x41; | |
563 | else | |
564 | atc[VGA_ATC_MODE] = 0x81; | |
565 | atc[VGA_ATC_OVERSCAN] = 0x00; /* 0 for EGA, 0xFF for VGA */ | |
566 | atc[VGA_ATC_PLANE_ENABLE] = 0x0F; | |
567 | if (par->mode & MODE_8BPP) | |
568 | atc[VGA_ATC_PEL] = (info->var.xoffset & 3) << 1; | |
569 | else | |
570 | atc[VGA_ATC_PEL] = info->var.xoffset & 7; | |
571 | atc[VGA_ATC_COLOR_PAGE] = 0x00; | |
572 | ||
573 | if (par->mode & MODE_TEXT) { | |
574 | fh = 16; // FIXME !!! Fudge font height. | |
575 | par->crtc[VGA_CRTC_MAX_SCAN] = (par->crtc[VGA_CRTC_MAX_SCAN] | |
576 | & ~0x1F) | (fh - 1); | |
577 | } | |
578 | ||
579 | vga_io_w(VGA_MIS_W, vga_io_r(VGA_MIS_R) | 0x01); | |
580 | ||
581 | /* Enable graphics register modification */ | |
582 | if (!par->isVGA) { | |
583 | vga_io_w(EGA_GFX_E0, 0x00); | |
584 | vga_io_w(EGA_GFX_E1, 0x01); | |
585 | } | |
586 | ||
587 | /* update misc output register */ | |
588 | vga_io_w(VGA_MIS_W, par->misc); | |
589 | ||
590 | /* synchronous reset on */ | |
591 | vga_io_wseq(0x00, 0x01); | |
592 | ||
593 | if (par->isVGA) | |
594 | vga_io_w(VGA_PEL_MSK, par->pel_msk); | |
595 | ||
596 | /* write sequencer registers */ | |
597 | vga_io_wseq(VGA_SEQ_CLOCK_MODE, seq[VGA_SEQ_CLOCK_MODE] | 0x20); | |
598 | for (i = 2; i < VGA_SEQ_C; i++) { | |
599 | vga_io_wseq(i, seq[i]); | |
600 | } | |
601 | ||
602 | /* synchronous reset off */ | |
603 | vga_io_wseq(0x00, 0x03); | |
604 | ||
605 | /* deprotect CRT registers 0-7 */ | |
606 | vga_io_wcrt(VGA_CRTC_V_SYNC_END, par->crtc[VGA_CRTC_V_SYNC_END]); | |
607 | ||
608 | /* write CRT registers */ | |
609 | for (i = 0; i < VGA_CRTC_REGS; i++) { | |
610 | vga_io_wcrt(i, par->crtc[i]); | |
611 | } | |
612 | ||
613 | /* write graphics controller registers */ | |
614 | for (i = 0; i < VGA_GFX_C; i++) { | |
615 | vga_io_wgfx(i, gdc[i]); | |
616 | } | |
617 | ||
618 | /* write attribute controller registers */ | |
619 | for (i = 0; i < VGA_ATT_C; i++) { | |
620 | vga_io_r(VGA_IS1_RC); /* reset flip-flop */ | |
621 | vga_io_wattr(i, atc[i]); | |
622 | } | |
623 | ||
624 | /* Wait for screen to stabilize. */ | |
625 | mdelay(50); | |
626 | ||
627 | vga_io_wseq(VGA_SEQ_CLOCK_MODE, seq[VGA_SEQ_CLOCK_MODE]); | |
628 | ||
629 | vga_io_r(VGA_IS1_RC); | |
630 | vga_io_w(VGA_ATT_IW, 0x20); | |
631 | ||
632 | vga16fb_update_fix(info); | |
633 | return 0; | |
634 | } | |
635 | ||
636 | static void ega16_setpalette(int regno, unsigned red, unsigned green, unsigned blue) | |
637 | { | |
ec1a7b3d | 638 | static const unsigned char map[] = { 000, 001, 010, 011 }; |
1da177e4 LT |
639 | int val; |
640 | ||
641 | if (regno >= 16) | |
642 | return; | |
643 | val = map[red>>14] | ((map[green>>14]) << 1) | ((map[blue>>14]) << 2); | |
644 | vga_io_r(VGA_IS1_RC); /* ! 0x3BA */ | |
645 | vga_io_wattr(regno, val); | |
646 | vga_io_r(VGA_IS1_RC); /* some clones need it */ | |
647 | vga_io_w(VGA_ATT_IW, 0x20); /* unblank screen */ | |
648 | } | |
649 | ||
650 | static void vga16_setpalette(int regno, unsigned red, unsigned green, unsigned blue) | |
651 | { | |
98219374 KH |
652 | outb(regno, VGA_PEL_IW); |
653 | outb(red >> 10, VGA_PEL_D); | |
654 | outb(green >> 10, VGA_PEL_D); | |
655 | outb(blue >> 10, VGA_PEL_D); | |
1da177e4 LT |
656 | } |
657 | ||
658 | static int vga16fb_setcolreg(unsigned regno, unsigned red, unsigned green, | |
659 | unsigned blue, unsigned transp, | |
660 | struct fb_info *info) | |
661 | { | |
120ddb41 | 662 | struct vga16fb_par *par = info->par; |
1da177e4 LT |
663 | int gray; |
664 | ||
665 | /* | |
666 | * Set a single color register. The values supplied are | |
667 | * already rounded down to the hardware's capabilities | |
668 | * (according to the entries in the `var' structure). Return | |
669 | * != 0 for invalid regno. | |
670 | */ | |
671 | ||
672 | if (regno >= 256) | |
673 | return 1; | |
674 | ||
675 | gray = info->var.grayscale; | |
676 | ||
677 | if (gray) { | |
678 | /* gray = 0.30*R + 0.59*G + 0.11*B */ | |
679 | red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8; | |
680 | } | |
681 | if (par->isVGA) | |
682 | vga16_setpalette(regno,red,green,blue); | |
683 | else | |
684 | ega16_setpalette(regno,red,green,blue); | |
685 | return 0; | |
686 | } | |
687 | ||
688 | static int vga16fb_pan_display(struct fb_var_screeninfo *var, | |
689 | struct fb_info *info) | |
690 | { | |
1da177e4 | 691 | vga16fb_pan_var(info, var); |
1da177e4 LT |
692 | return 0; |
693 | } | |
694 | ||
695 | /* The following VESA blanking code is taken from vgacon.c. The VGA | |
696 | blanking code was originally by Huang shi chao, and modified by | |
697 | Christoph Rimek (chrimek@toppoint.de) and todd j. derr | |
698 | (tjd@barefoot.org) for Linux. */ | |
1da177e4 LT |
699 | |
700 | static void vga_vesa_blank(struct vga16fb_par *par, int mode) | |
701 | { | |
98219374 KH |
702 | unsigned char SeqCtrlIndex = vga_io_r(VGA_SEQ_I); |
703 | unsigned char CrtCtrlIndex = vga_io_r(VGA_CRT_IC); | |
1da177e4 | 704 | |
1da177e4 LT |
705 | /* save original values of VGA controller registers */ |
706 | if(!par->vesa_blanked) { | |
98219374 | 707 | par->vga_state.CrtMiscIO = vga_io_r(VGA_MIS_R); |
1da177e4 LT |
708 | //sti(); |
709 | ||
710 | par->vga_state.HorizontalTotal = vga_io_rcrt(0x00); /* HorizontalTotal */ | |
711 | par->vga_state.HorizDisplayEnd = vga_io_rcrt(0x01); /* HorizDisplayEnd */ | |
712 | par->vga_state.StartHorizRetrace = vga_io_rcrt(0x04); /* StartHorizRetrace */ | |
713 | par->vga_state.EndHorizRetrace = vga_io_rcrt(0x05); /* EndHorizRetrace */ | |
714 | par->vga_state.Overflow = vga_io_rcrt(0x07); /* Overflow */ | |
715 | par->vga_state.StartVertRetrace = vga_io_rcrt(0x10); /* StartVertRetrace */ | |
716 | par->vga_state.EndVertRetrace = vga_io_rcrt(0x11); /* EndVertRetrace */ | |
717 | par->vga_state.ModeControl = vga_io_rcrt(0x17); /* ModeControl */ | |
718 | par->vga_state.ClockingMode = vga_io_rseq(0x01); /* ClockingMode */ | |
719 | } | |
720 | ||
721 | /* assure that video is enabled */ | |
722 | /* "0x20" is VIDEO_ENABLE_bit in register 01 of sequencer */ | |
1da177e4 LT |
723 | vga_io_wseq(0x01, par->vga_state.ClockingMode | 0x20); |
724 | ||
725 | /* test for vertical retrace in process.... */ | |
726 | if ((par->vga_state.CrtMiscIO & 0x80) == 0x80) | |
98219374 | 727 | vga_io_w(VGA_MIS_W, par->vga_state.CrtMiscIO & 0xef); |
1da177e4 LT |
728 | |
729 | /* | |
730 | * Set <End of vertical retrace> to minimum (0) and | |
731 | * <Start of vertical Retrace> to maximum (incl. overflow) | |
732 | * Result: turn off vertical sync (VSync) pulse. | |
733 | */ | |
734 | if (mode & FB_BLANK_VSYNC_SUSPEND) { | |
98219374 KH |
735 | vga_io_wcrt(VGA_CRTC_V_SYNC_START, 0xff); |
736 | vga_io_wcrt(VGA_CRTC_V_SYNC_END, 0x40); | |
737 | /* bits 9,10 of vert. retrace */ | |
738 | vga_io_wcrt(VGA_CRTC_OVERFLOW, par->vga_state.Overflow | 0x84); | |
1da177e4 LT |
739 | } |
740 | ||
741 | if (mode & FB_BLANK_HSYNC_SUSPEND) { | |
742 | /* | |
743 | * Set <End of horizontal retrace> to minimum (0) and | |
744 | * <Start of horizontal Retrace> to maximum | |
745 | * Result: turn off horizontal sync (HSync) pulse. | |
746 | */ | |
98219374 KH |
747 | vga_io_wcrt(VGA_CRTC_H_SYNC_START, 0xff); |
748 | vga_io_wcrt(VGA_CRTC_H_SYNC_END, 0x00); | |
1da177e4 LT |
749 | } |
750 | ||
751 | /* restore both index registers */ | |
98219374 KH |
752 | outb_p(SeqCtrlIndex, VGA_SEQ_I); |
753 | outb_p(CrtCtrlIndex, VGA_CRT_IC); | |
1da177e4 LT |
754 | } |
755 | ||
756 | static void vga_vesa_unblank(struct vga16fb_par *par) | |
757 | { | |
98219374 KH |
758 | unsigned char SeqCtrlIndex = vga_io_r(VGA_SEQ_I); |
759 | unsigned char CrtCtrlIndex = vga_io_r(VGA_CRT_IC); | |
1da177e4 | 760 | |
1da177e4 | 761 | /* restore original values of VGA controller registers */ |
98219374 | 762 | vga_io_w(VGA_MIS_W, par->vga_state.CrtMiscIO); |
1da177e4 LT |
763 | |
764 | /* HorizontalTotal */ | |
765 | vga_io_wcrt(0x00, par->vga_state.HorizontalTotal); | |
766 | /* HorizDisplayEnd */ | |
767 | vga_io_wcrt(0x01, par->vga_state.HorizDisplayEnd); | |
768 | /* StartHorizRetrace */ | |
769 | vga_io_wcrt(0x04, par->vga_state.StartHorizRetrace); | |
770 | /* EndHorizRetrace */ | |
771 | vga_io_wcrt(0x05, par->vga_state.EndHorizRetrace); | |
772 | /* Overflow */ | |
773 | vga_io_wcrt(0x07, par->vga_state.Overflow); | |
774 | /* StartVertRetrace */ | |
775 | vga_io_wcrt(0x10, par->vga_state.StartVertRetrace); | |
776 | /* EndVertRetrace */ | |
777 | vga_io_wcrt(0x11, par->vga_state.EndVertRetrace); | |
778 | /* ModeControl */ | |
779 | vga_io_wcrt(0x17, par->vga_state.ModeControl); | |
780 | /* ClockingMode */ | |
781 | vga_io_wseq(0x01, par->vga_state.ClockingMode); | |
782 | ||
783 | /* restore index/control registers */ | |
98219374 KH |
784 | vga_io_w(VGA_SEQ_I, SeqCtrlIndex); |
785 | vga_io_w(VGA_CRT_IC, CrtCtrlIndex); | |
1da177e4 LT |
786 | } |
787 | ||
788 | static void vga_pal_blank(void) | |
789 | { | |
790 | int i; | |
791 | ||
792 | for (i=0; i<16; i++) { | |
98219374 KH |
793 | outb_p(i, VGA_PEL_IW); |
794 | outb_p(0, VGA_PEL_D); | |
795 | outb_p(0, VGA_PEL_D); | |
796 | outb_p(0, VGA_PEL_D); | |
1da177e4 LT |
797 | } |
798 | } | |
799 | ||
800 | /* 0 unblank, 1 blank, 2 no vsync, 3 no hsync, 4 off */ | |
801 | static int vga16fb_blank(int blank, struct fb_info *info) | |
802 | { | |
120ddb41 | 803 | struct vga16fb_par *par = info->par; |
1da177e4 LT |
804 | |
805 | switch (blank) { | |
806 | case FB_BLANK_UNBLANK: /* Unblank */ | |
807 | if (par->vesa_blanked) { | |
808 | vga_vesa_unblank(par); | |
809 | par->vesa_blanked = 0; | |
810 | } | |
811 | if (par->palette_blanked) { | |
812 | par->palette_blanked = 0; | |
813 | } | |
814 | break; | |
815 | case FB_BLANK_NORMAL: /* blank */ | |
816 | vga_pal_blank(); | |
817 | par->palette_blanked = 1; | |
818 | break; | |
819 | default: /* VESA blanking */ | |
820 | vga_vesa_blank(par, blank); | |
821 | par->vesa_blanked = 1; | |
822 | break; | |
823 | } | |
824 | return 0; | |
825 | } | |
826 | ||
827 | static void vga_8planes_fillrect(struct fb_info *info, const struct fb_fillrect *rect) | |
828 | { | |
829 | u32 dx = rect->dx, width = rect->width; | |
830 | char oldindex = getindex(); | |
831 | char oldmode = setmode(0x40); | |
832 | char oldmask = selectmask(); | |
833 | int line_ofs, height; | |
834 | char oldop, oldsr; | |
835 | char __iomem *where; | |
836 | ||
837 | dx /= 4; | |
838 | where = info->screen_base + dx + rect->dy * info->fix.line_length; | |
839 | ||
840 | if (rect->rop == ROP_COPY) { | |
841 | oldop = setop(0); | |
842 | oldsr = setsr(0); | |
843 | ||
844 | width /= 4; | |
845 | line_ofs = info->fix.line_length - width; | |
846 | setmask(0xff); | |
847 | ||
848 | height = rect->height; | |
849 | ||
850 | while (height--) { | |
851 | int x; | |
852 | ||
853 | /* we can do memset... */ | |
854 | for (x = width; x > 0; --x) { | |
855 | writeb(rect->color, where); | |
856 | where++; | |
857 | } | |
858 | where += line_ofs; | |
859 | } | |
860 | } else { | |
861 | char oldcolor = setcolor(0xf); | |
862 | int y; | |
863 | ||
864 | oldop = setop(0x18); | |
865 | oldsr = setsr(0xf); | |
866 | setmask(0x0F); | |
867 | for (y = 0; y < rect->height; y++) { | |
868 | rmw(where); | |
869 | rmw(where+1); | |
870 | where += info->fix.line_length; | |
871 | } | |
872 | setcolor(oldcolor); | |
873 | } | |
874 | setmask(oldmask); | |
875 | setsr(oldsr); | |
876 | setop(oldop); | |
877 | setmode(oldmode); | |
878 | setindex(oldindex); | |
879 | } | |
880 | ||
881 | static void vga16fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect) | |
882 | { | |
883 | int x, x2, y2, vxres, vyres, width, height, line_ofs; | |
884 | char __iomem *dst; | |
885 | ||
886 | vxres = info->var.xres_virtual; | |
887 | vyres = info->var.yres_virtual; | |
888 | ||
889 | if (!rect->width || !rect->height || rect->dx > vxres || rect->dy > vyres) | |
890 | return; | |
891 | ||
892 | /* We could use hardware clipping but on many cards you get around | |
893 | * hardware clipping by writing to framebuffer directly. */ | |
894 | ||
895 | x2 = rect->dx + rect->width; | |
896 | y2 = rect->dy + rect->height; | |
897 | x2 = x2 < vxres ? x2 : vxres; | |
898 | y2 = y2 < vyres ? y2 : vyres; | |
899 | width = x2 - rect->dx; | |
900 | ||
901 | switch (info->fix.type) { | |
902 | case FB_TYPE_VGA_PLANES: | |
903 | if (info->fix.type_aux == FB_AUX_VGA_PLANES_VGA4) { | |
904 | ||
905 | height = y2 - rect->dy; | |
906 | width = rect->width/8; | |
907 | ||
908 | line_ofs = info->fix.line_length - width; | |
909 | dst = info->screen_base + (rect->dx/8) + rect->dy * info->fix.line_length; | |
910 | ||
911 | switch (rect->rop) { | |
912 | case ROP_COPY: | |
913 | setmode(0); | |
914 | setop(0); | |
915 | setsr(0xf); | |
916 | setcolor(rect->color); | |
917 | selectmask(); | |
918 | ||
919 | setmask(0xff); | |
920 | ||
921 | while (height--) { | |
922 | for (x = 0; x < width; x++) { | |
923 | writeb(0, dst); | |
924 | dst++; | |
925 | } | |
926 | dst += line_ofs; | |
927 | } | |
928 | break; | |
929 | case ROP_XOR: | |
930 | setmode(0); | |
931 | setop(0x18); | |
932 | setsr(0xf); | |
933 | setcolor(0xf); | |
934 | selectmask(); | |
935 | ||
936 | setmask(0xff); | |
937 | while (height--) { | |
938 | for (x = 0; x < width; x++) { | |
939 | rmw(dst); | |
940 | dst++; | |
941 | } | |
942 | dst += line_ofs; | |
943 | } | |
944 | break; | |
945 | } | |
946 | } else | |
947 | vga_8planes_fillrect(info, rect); | |
948 | break; | |
949 | case FB_TYPE_PACKED_PIXELS: | |
950 | default: | |
951 | cfb_fillrect(info, rect); | |
952 | break; | |
953 | } | |
954 | } | |
955 | ||
956 | static void vga_8planes_copyarea(struct fb_info *info, const struct fb_copyarea *area) | |
957 | { | |
958 | char oldindex = getindex(); | |
959 | char oldmode = setmode(0x41); | |
960 | char oldop = setop(0); | |
961 | char oldsr = setsr(0xf); | |
962 | int height, line_ofs, x; | |
963 | u32 sx, dx, width; | |
964 | char __iomem *dest; | |
965 | char __iomem *src; | |
966 | ||
967 | height = area->height; | |
968 | ||
969 | sx = area->sx / 4; | |
970 | dx = area->dx / 4; | |
971 | width = area->width / 4; | |
972 | ||
973 | if (area->dy < area->sy || (area->dy == area->sy && dx < sx)) { | |
974 | line_ofs = info->fix.line_length - width; | |
975 | dest = info->screen_base + dx + area->dy * info->fix.line_length; | |
976 | src = info->screen_base + sx + area->sy * info->fix.line_length; | |
977 | while (height--) { | |
978 | for (x = 0; x < width; x++) { | |
979 | readb(src); | |
980 | writeb(0, dest); | |
981 | src++; | |
982 | dest++; | |
983 | } | |
984 | src += line_ofs; | |
985 | dest += line_ofs; | |
986 | } | |
987 | } else { | |
988 | line_ofs = info->fix.line_length - width; | |
989 | dest = info->screen_base + dx + width + | |
990 | (area->dy + height - 1) * info->fix.line_length; | |
991 | src = info->screen_base + sx + width + | |
992 | (area->sy + height - 1) * info->fix.line_length; | |
993 | while (height--) { | |
994 | for (x = 0; x < width; x++) { | |
995 | --src; | |
996 | --dest; | |
997 | readb(src); | |
998 | writeb(0, dest); | |
999 | } | |
1000 | src -= line_ofs; | |
1001 | dest -= line_ofs; | |
1002 | } | |
1003 | } | |
1004 | ||
1005 | setsr(oldsr); | |
1006 | setop(oldop); | |
1007 | setmode(oldmode); | |
1008 | setindex(oldindex); | |
1009 | } | |
1010 | ||
1011 | static void vga16fb_copyarea(struct fb_info *info, const struct fb_copyarea *area) | |
1012 | { | |
1013 | u32 dx = area->dx, dy = area->dy, sx = area->sx, sy = area->sy; | |
1014 | int x, x2, y2, old_dx, old_dy, vxres, vyres; | |
1015 | int height, width, line_ofs; | |
1016 | char __iomem *dst = NULL; | |
1017 | char __iomem *src = NULL; | |
1018 | ||
1019 | vxres = info->var.xres_virtual; | |
1020 | vyres = info->var.yres_virtual; | |
1021 | ||
1022 | if (area->dx > vxres || area->sx > vxres || area->dy > vyres || | |
1023 | area->sy > vyres) | |
1024 | return; | |
1025 | ||
1026 | /* clip the destination */ | |
1027 | old_dx = area->dx; | |
1028 | old_dy = area->dy; | |
1029 | ||
1030 | /* | |
1031 | * We could use hardware clipping but on many cards you get around | |
1032 | * hardware clipping by writing to framebuffer directly. | |
1033 | */ | |
1034 | x2 = area->dx + area->width; | |
1035 | y2 = area->dy + area->height; | |
1036 | dx = area->dx > 0 ? area->dx : 0; | |
1037 | dy = area->dy > 0 ? area->dy : 0; | |
1038 | x2 = x2 < vxres ? x2 : vxres; | |
1039 | y2 = y2 < vyres ? y2 : vyres; | |
1040 | width = x2 - dx; | |
1041 | height = y2 - dy; | |
1042 | ||
77a6e7ab RK |
1043 | if (sx + dx < old_dx || sy + dy < old_dy) |
1044 | return; | |
1045 | ||
1da177e4 LT |
1046 | /* update sx1,sy1 */ |
1047 | sx += (dx - old_dx); | |
1048 | sy += (dy - old_dy); | |
1049 | ||
1050 | /* the source must be completely inside the virtual screen */ | |
77a6e7ab | 1051 | if (sx + width > vxres || sy + height > vyres) |
1da177e4 LT |
1052 | return; |
1053 | ||
1054 | switch (info->fix.type) { | |
1055 | case FB_TYPE_VGA_PLANES: | |
1056 | if (info->fix.type_aux == FB_AUX_VGA_PLANES_VGA4) { | |
1057 | width = width/8; | |
1058 | height = height; | |
1059 | line_ofs = info->fix.line_length - width; | |
1060 | ||
1061 | setmode(1); | |
1062 | setop(0); | |
1063 | setsr(0xf); | |
1064 | ||
1065 | if (dy < sy || (dy == sy && dx < sx)) { | |
1066 | dst = info->screen_base + (dx/8) + dy * info->fix.line_length; | |
1067 | src = info->screen_base + (sx/8) + sy * info->fix.line_length; | |
1068 | while (height--) { | |
1069 | for (x = 0; x < width; x++) { | |
1070 | readb(src); | |
1071 | writeb(0, dst); | |
1072 | dst++; | |
1073 | src++; | |
1074 | } | |
1075 | src += line_ofs; | |
1076 | dst += line_ofs; | |
1077 | } | |
1078 | } else { | |
1079 | dst = info->screen_base + (dx/8) + width + | |
1080 | (dy + height - 1) * info->fix.line_length; | |
1081 | src = info->screen_base + (sx/8) + width + | |
1082 | (sy + height - 1) * info->fix.line_length; | |
1083 | while (height--) { | |
1084 | for (x = 0; x < width; x++) { | |
1085 | dst--; | |
1086 | src--; | |
1087 | readb(src); | |
1088 | writeb(0, dst); | |
1089 | } | |
1090 | src -= line_ofs; | |
1091 | dst -= line_ofs; | |
1092 | } | |
1093 | } | |
1094 | } else | |
1095 | vga_8planes_copyarea(info, area); | |
1096 | break; | |
1097 | case FB_TYPE_PACKED_PIXELS: | |
1098 | default: | |
1099 | cfb_copyarea(info, area); | |
1100 | break; | |
1101 | } | |
1102 | } | |
1103 | ||
ec1a7b3d HD |
1104 | #define TRANS_MASK_LOW {0x0,0x8,0x4,0xC,0x2,0xA,0x6,0xE,0x1,0x9,0x5,0xD,0x3,0xB,0x7,0xF} |
1105 | #define TRANS_MASK_HIGH {0x000, 0x800, 0x400, 0xC00, 0x200, 0xA00, 0x600, 0xE00, \ | |
1106 | 0x100, 0x900, 0x500, 0xD00, 0x300, 0xB00, 0x700, 0xF00} | |
1107 | ||
1108 | #if defined(__LITTLE_ENDIAN) | |
1109 | static const u16 transl_l[] = TRANS_MASK_LOW; | |
1110 | static const u16 transl_h[] = TRANS_MASK_HIGH; | |
1111 | #elif defined(__BIG_ENDIAN) | |
1112 | static const u16 transl_l[] = TRANS_MASK_HIGH; | |
1113 | static const u16 transl_h[] = TRANS_MASK_LOW; | |
1da177e4 LT |
1114 | #else |
1115 | #error "Only __BIG_ENDIAN and __LITTLE_ENDIAN are supported in vga-planes" | |
1116 | #endif | |
1da177e4 LT |
1117 | |
1118 | static void vga_8planes_imageblit(struct fb_info *info, const struct fb_image *image) | |
1119 | { | |
1120 | char oldindex = getindex(); | |
1121 | char oldmode = setmode(0x40); | |
1122 | char oldop = setop(0); | |
1123 | char oldsr = setsr(0); | |
1124 | char oldmask = selectmask(); | |
1125 | const char *cdat = image->data; | |
1126 | u32 dx = image->dx; | |
1127 | char __iomem *where; | |
1128 | int y; | |
1129 | ||
1130 | dx /= 4; | |
1131 | where = info->screen_base + dx + image->dy * info->fix.line_length; | |
1132 | ||
1133 | setmask(0xff); | |
1134 | writeb(image->bg_color, where); | |
1135 | readb(where); | |
1136 | selectmask(); | |
1137 | setmask(image->fg_color ^ image->bg_color); | |
1138 | setmode(0x42); | |
1139 | setop(0x18); | |
1140 | for (y = 0; y < image->height; y++, where += info->fix.line_length) | |
1141 | writew(transl_h[cdat[y]&0xF] | transl_l[cdat[y] >> 4], where); | |
1142 | setmask(oldmask); | |
1143 | setsr(oldsr); | |
1144 | setop(oldop); | |
1145 | setmode(oldmode); | |
1146 | setindex(oldindex); | |
1147 | } | |
1148 | ||
1149 | static void vga_imageblit_expand(struct fb_info *info, const struct fb_image *image) | |
1150 | { | |
1151 | char __iomem *where = info->screen_base + (image->dx/8) + | |
1152 | image->dy * info->fix.line_length; | |
120ddb41 | 1153 | struct vga16fb_par *par = info->par; |
1da177e4 LT |
1154 | char *cdat = (char *) image->data; |
1155 | char __iomem *dst; | |
1156 | int x, y; | |
1157 | ||
1158 | switch (info->fix.type) { | |
1159 | case FB_TYPE_VGA_PLANES: | |
1160 | if (info->fix.type_aux == FB_AUX_VGA_PLANES_VGA4) { | |
1161 | if (par->isVGA) { | |
1162 | setmode(2); | |
1163 | setop(0); | |
1164 | setsr(0xf); | |
1165 | setcolor(image->fg_color); | |
1166 | selectmask(); | |
1167 | ||
1168 | setmask(0xff); | |
1169 | writeb(image->bg_color, where); | |
1170 | rmb(); | |
1171 | readb(where); /* fill latches */ | |
1172 | setmode(3); | |
1173 | wmb(); | |
1174 | for (y = 0; y < image->height; y++) { | |
1175 | dst = where; | |
1176 | for (x = image->width/8; x--;) | |
1177 | writeb(*cdat++, dst++); | |
1178 | where += info->fix.line_length; | |
1179 | } | |
1180 | wmb(); | |
1181 | } else { | |
1182 | setmode(0); | |
1183 | setop(0); | |
1184 | setsr(0xf); | |
1185 | setcolor(image->bg_color); | |
1186 | selectmask(); | |
1187 | ||
1188 | setmask(0xff); | |
1189 | for (y = 0; y < image->height; y++) { | |
1190 | dst = where; | |
1191 | for (x=image->width/8; x--;){ | |
1192 | rmw(dst); | |
1193 | setcolor(image->fg_color); | |
1194 | selectmask(); | |
1195 | if (*cdat) { | |
1196 | setmask(*cdat++); | |
1197 | rmw(dst++); | |
1198 | } | |
1199 | } | |
1200 | where += info->fix.line_length; | |
1201 | } | |
1202 | } | |
1203 | } else | |
1204 | vga_8planes_imageblit(info, image); | |
1205 | break; | |
1206 | case FB_TYPE_PACKED_PIXELS: | |
1207 | default: | |
1208 | cfb_imageblit(info, image); | |
1209 | break; | |
1210 | } | |
1211 | } | |
1212 | ||
1213 | static void vga_imageblit_color(struct fb_info *info, const struct fb_image *image) | |
1214 | { | |
1215 | /* | |
1216 | * Draw logo | |
1217 | */ | |
120ddb41 | 1218 | struct vga16fb_par *par = info->par; |
1da177e4 LT |
1219 | char __iomem *where = |
1220 | info->screen_base + image->dy * info->fix.line_length + | |
1221 | image->dx/8; | |
1222 | const char *cdat = image->data; | |
1223 | char __iomem *dst; | |
1224 | int x, y; | |
1225 | ||
1226 | switch (info->fix.type) { | |
1227 | case FB_TYPE_VGA_PLANES: | |
1228 | if (info->fix.type_aux == FB_AUX_VGA_PLANES_VGA4 && | |
1229 | par->isVGA) { | |
1230 | setsr(0xf); | |
1231 | setop(0); | |
1232 | setmode(0); | |
1233 | ||
1234 | for (y = 0; y < image->height; y++) { | |
1235 | for (x = 0; x < image->width; x++) { | |
1236 | dst = where + x/8; | |
1237 | ||
1238 | setcolor(*cdat); | |
1239 | selectmask(); | |
1240 | setmask(1 << (7 - (x % 8))); | |
1241 | fb_readb(dst); | |
1242 | fb_writeb(0, dst); | |
1243 | ||
1244 | cdat++; | |
1245 | } | |
1246 | where += info->fix.line_length; | |
1247 | } | |
1248 | } | |
1249 | break; | |
1250 | case FB_TYPE_PACKED_PIXELS: | |
1251 | cfb_imageblit(info, image); | |
1252 | break; | |
1253 | default: | |
1254 | break; | |
1255 | } | |
1256 | } | |
1257 | ||
1258 | static void vga16fb_imageblit(struct fb_info *info, const struct fb_image *image) | |
1259 | { | |
1260 | if (image->depth == 1) | |
1261 | vga_imageblit_expand(info, image); | |
1262 | else | |
1263 | vga_imageblit_color(info, image); | |
1264 | } | |
1265 | ||
3b9676e7 MS |
1266 | static void vga16fb_destroy(struct fb_info *info) |
1267 | { | |
a50d28de | 1268 | struct platform_device *dev = container_of(info->device, struct platform_device, dev); |
3b9676e7 MS |
1269 | iounmap(info->screen_base); |
1270 | fb_dealloc_cmap(&info->cmap); | |
1271 | /* XXX unshare VGA regions */ | |
a50d28de | 1272 | platform_set_drvdata(dev, NULL); |
3b9676e7 MS |
1273 | framebuffer_release(info); |
1274 | } | |
1275 | ||
1da177e4 LT |
1276 | static struct fb_ops vga16fb_ops = { |
1277 | .owner = THIS_MODULE, | |
1278 | .fb_open = vga16fb_open, | |
1279 | .fb_release = vga16fb_release, | |
3b9676e7 | 1280 | .fb_destroy = vga16fb_destroy, |
1da177e4 LT |
1281 | .fb_check_var = vga16fb_check_var, |
1282 | .fb_set_par = vga16fb_set_par, | |
1283 | .fb_setcolreg = vga16fb_setcolreg, | |
1284 | .fb_pan_display = vga16fb_pan_display, | |
1285 | .fb_blank = vga16fb_blank, | |
1286 | .fb_fillrect = vga16fb_fillrect, | |
1287 | .fb_copyarea = vga16fb_copyarea, | |
1288 | .fb_imageblit = vga16fb_imageblit, | |
1da177e4 LT |
1289 | }; |
1290 | ||
1291 | #ifndef MODULE | |
ad145846 | 1292 | static int __init vga16fb_setup(char *options) |
1da177e4 LT |
1293 | { |
1294 | char *this_opt; | |
1295 | ||
1296 | if (!options || !*options) | |
1297 | return 0; | |
1298 | ||
1299 | while ((this_opt = strsep(&options, ",")) != NULL) { | |
1300 | if (!*this_opt) continue; | |
1301 | } | |
1302 | return 0; | |
1303 | } | |
1304 | #endif | |
1305 | ||
c2e13037 | 1306 | static int __devinit vga16fb_probe(struct platform_device *dev) |
1da177e4 | 1307 | { |
120ddb41 AD |
1308 | struct fb_info *info; |
1309 | struct vga16fb_par *par; | |
1da177e4 | 1310 | int i; |
120ddb41 | 1311 | int ret = 0; |
1da177e4 | 1312 | |
1da177e4 | 1313 | printk(KERN_DEBUG "vga16fb: initializing\n"); |
120ddb41 AD |
1314 | info = framebuffer_alloc(sizeof(struct vga16fb_par), &dev->dev); |
1315 | ||
1316 | if (!info) { | |
1317 | ret = -ENOMEM; | |
1318 | goto err_fb_alloc; | |
1319 | } | |
3b9676e7 MS |
1320 | info->apertures = alloc_apertures(1); |
1321 | if (!info->apertures) { | |
1322 | ret = -ENOMEM; | |
1323 | goto err_ioremap; | |
1324 | } | |
1da177e4 LT |
1325 | |
1326 | /* XXX share VGA_FB_PHYS and I/O region with vgacon and others */ | |
4f1bcaf0 | 1327 | info->screen_base = (void __iomem *)VGA_MAP_MEM(VGA_FB_PHYS, 0); |
1da177e4 | 1328 | |
120ddb41 | 1329 | if (!info->screen_base) { |
1da177e4 LT |
1330 | printk(KERN_ERR "vga16fb: unable to map device\n"); |
1331 | ret = -ENOMEM; | |
1332 | goto err_ioremap; | |
1333 | } | |
1da177e4 | 1334 | |
120ddb41 AD |
1335 | printk(KERN_INFO "vga16fb: mapped to 0x%p\n", info->screen_base); |
1336 | par = info->par; | |
1da177e4 | 1337 | |
3ea33510 | 1338 | par->isVGA = screen_info.orig_video_isVGA; |
120ddb41 AD |
1339 | par->palette_blanked = 0; |
1340 | par->vesa_blanked = 0; | |
1341 | ||
1342 | i = par->isVGA? 6 : 2; | |
1da177e4 LT |
1343 | |
1344 | vga16fb_defined.red.length = i; | |
1345 | vga16fb_defined.green.length = i; | |
1346 | vga16fb_defined.blue.length = i; | |
1347 | ||
1348 | /* name should not depend on EGA/VGA */ | |
120ddb41 AD |
1349 | info->fbops = &vga16fb_ops; |
1350 | info->var = vga16fb_defined; | |
1351 | info->fix = vga16fb_fix; | |
7e645ffd AD |
1352 | /* supports rectangles with widths of multiples of 8 */ |
1353 | info->pixmap.blit_x = 1 << 7 | 1 << 15 | 1 << 23 | 1 << 31; | |
3b9676e7 | 1354 | info->flags = FBINFO_FLAG_DEFAULT | FBINFO_MISC_FIRMWARE | |
1da177e4 LT |
1355 | FBINFO_HWACCEL_YPAN; |
1356 | ||
120ddb41 AD |
1357 | i = (info->var.bits_per_pixel == 8) ? 256 : 16; |
1358 | ret = fb_alloc_cmap(&info->cmap, i, 0); | |
1da177e4 LT |
1359 | if (ret) { |
1360 | printk(KERN_ERR "vga16fb: unable to allocate colormap\n"); | |
1361 | ret = -ENOMEM; | |
1362 | goto err_alloc_cmap; | |
1363 | } | |
1364 | ||
120ddb41 | 1365 | if (vga16fb_check_var(&info->var, info)) { |
1da177e4 LT |
1366 | printk(KERN_ERR "vga16fb: unable to validate variable\n"); |
1367 | ret = -EINVAL; | |
1368 | goto err_check_var; | |
1369 | } | |
1370 | ||
120ddb41 | 1371 | vga16fb_update_fix(info); |
1da177e4 | 1372 | |
3b9676e7 MS |
1373 | info->apertures->ranges[0].base = VGA_FB_PHYS; |
1374 | info->apertures->ranges[0].size = VGA_FB_PHYS_LEN; | |
1375 | ||
120ddb41 | 1376 | if (register_framebuffer(info) < 0) { |
1da177e4 LT |
1377 | printk(KERN_ERR "vga16fb: unable to register framebuffer\n"); |
1378 | ret = -EINVAL; | |
1379 | goto err_check_var; | |
1380 | } | |
1381 | ||
1382 | printk(KERN_INFO "fb%d: %s frame buffer device\n", | |
120ddb41 | 1383 | info->node, info->fix.id); |
ae6d3218 | 1384 | platform_set_drvdata(dev, info); |
1da177e4 LT |
1385 | |
1386 | return 0; | |
1387 | ||
1388 | err_check_var: | |
120ddb41 | 1389 | fb_dealloc_cmap(&info->cmap); |
1da177e4 | 1390 | err_alloc_cmap: |
120ddb41 | 1391 | iounmap(info->screen_base); |
1da177e4 | 1392 | err_ioremap: |
120ddb41 AD |
1393 | framebuffer_release(info); |
1394 | err_fb_alloc: | |
1395 | return ret; | |
1396 | } | |
1397 | ||
ad145846 | 1398 | static int __devexit vga16fb_remove(struct platform_device *dev) |
120ddb41 | 1399 | { |
ae6d3218 | 1400 | struct fb_info *info = platform_get_drvdata(dev); |
120ddb41 | 1401 | |
3b9676e7 | 1402 | if (info) |
120ddb41 | 1403 | unregister_framebuffer(info); |
120ddb41 AD |
1404 | |
1405 | return 0; | |
1406 | } | |
1407 | ||
ae6d3218 | 1408 | static struct platform_driver vga16fb_driver = { |
120ddb41 | 1409 | .probe = vga16fb_probe, |
ad145846 | 1410 | .remove = __devexit_p(vga16fb_remove), |
ae6d3218 AD |
1411 | .driver = { |
1412 | .name = "vga16fb", | |
1413 | }, | |
120ddb41 AD |
1414 | }; |
1415 | ||
ae6d3218 | 1416 | static struct platform_device *vga16fb_device; |
120ddb41 AD |
1417 | |
1418 | static int __init vga16fb_init(void) | |
1419 | { | |
1420 | int ret; | |
1421 | #ifndef MODULE | |
1422 | char *option = NULL; | |
1423 | ||
1424 | if (fb_get_options("vga16fb", &option)) | |
1425 | return -ENODEV; | |
1426 | ||
1427 | vga16fb_setup(option); | |
1428 | #endif | |
ae6d3218 | 1429 | ret = platform_driver_register(&vga16fb_driver); |
120ddb41 AD |
1430 | |
1431 | if (!ret) { | |
ae6d3218 AD |
1432 | vga16fb_device = platform_device_alloc("vga16fb", 0); |
1433 | ||
1434 | if (vga16fb_device) | |
1435 | ret = platform_device_add(vga16fb_device); | |
1436 | else | |
1437 | ret = -ENOMEM; | |
1438 | ||
1439 | if (ret) { | |
1440 | platform_device_put(vga16fb_device); | |
1441 | platform_driver_unregister(&vga16fb_driver); | |
1442 | } | |
120ddb41 AD |
1443 | } |
1444 | ||
1da177e4 LT |
1445 | return ret; |
1446 | } | |
1447 | ||
1448 | static void __exit vga16fb_exit(void) | |
1449 | { | |
ae6d3218 AD |
1450 | platform_device_unregister(vga16fb_device); |
1451 | platform_driver_unregister(&vga16fb_driver); | |
1da177e4 LT |
1452 | } |
1453 | ||
98219374 | 1454 | MODULE_DESCRIPTION("Legacy VGA framebuffer device driver"); |
1da177e4 LT |
1455 | MODULE_LICENSE("GPL"); |
1456 | module_init(vga16fb_init); | |
1457 | module_exit(vga16fb_exit); | |
1458 | ||
1459 | ||
1460 | /* | |
1461 | * Overrides for Emacs so that we follow Linus's tabbing style. | |
1462 | * --------------------------------------------------------------------------- | |
1463 | * Local variables: | |
1464 | * c-basic-offset: 8 | |
1465 | * End: | |
1466 | */ | |
1467 |