]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * framebuffer driver for VBE 2.0 compliant graphic boards | |
3 | * | |
4 | * switching to graphics mode happens at boot time (while | |
5 | * running in real mode, see arch/i386/boot/video.S). | |
6 | * | |
7 | * (c) 1998 Gerd Knorr <kraxel@goldbach.in-berlin.de> | |
8 | * | |
9 | */ | |
10 | ||
11 | #include <linux/module.h> | |
12 | #include <linux/kernel.h> | |
13 | #include <linux/errno.h> | |
14 | #include <linux/string.h> | |
15 | #include <linux/mm.h> | |
16 | #include <linux/tty.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/delay.h> | |
19 | #include <linux/fb.h> | |
20 | #include <linux/ioport.h> | |
21 | #include <linux/init.h> | |
d2d58384 | 22 | #include <video/vga.h> |
1da177e4 LT |
23 | #include <asm/io.h> |
24 | #include <asm/mtrr.h> | |
25 | ||
26 | #define dac_reg (0x3c8) | |
27 | #define dac_val (0x3c9) | |
28 | ||
29 | /* --------------------------------------------------------------------- */ | |
30 | ||
31 | static struct fb_var_screeninfo vesafb_defined __initdata = { | |
32 | .activate = FB_ACTIVATE_NOW, | |
33 | .height = -1, | |
34 | .width = -1, | |
35 | .right_margin = 32, | |
36 | .upper_margin = 16, | |
37 | .lower_margin = 4, | |
38 | .vsync_len = 4, | |
39 | .vmode = FB_VMODE_NONINTERLACED, | |
40 | }; | |
41 | ||
42 | static struct fb_fix_screeninfo vesafb_fix __initdata = { | |
43 | .id = "VESA VGA", | |
44 | .type = FB_TYPE_PACKED_PIXELS, | |
45 | .accel = FB_ACCEL_NONE, | |
46 | }; | |
47 | ||
48 | static int inverse = 0; | |
80625942 | 49 | static int mtrr = 3; /* default to write-combining */ |
1da177e4 LT |
50 | static int vram_remap __initdata = 0; /* Set amount of memory to be used */ |
51 | static int vram_total __initdata = 0; /* Set total amount of memory */ | |
52 | static int pmi_setpal = 0; /* pmi for palette changes ??? */ | |
53 | static int ypan = 0; /* 0..nothing, 1..ypan, 2..ywrap */ | |
54 | static unsigned short *pmi_base = NULL; | |
55 | static void (*pmi_start)(void); | |
56 | static void (*pmi_pal)(void); | |
57 | static int depth; | |
d2d58384 | 58 | static int vga_compat; |
1da177e4 LT |
59 | |
60 | /* --------------------------------------------------------------------- */ | |
61 | ||
62 | static int vesafb_pan_display(struct fb_var_screeninfo *var, | |
63 | struct fb_info *info) | |
64 | { | |
65 | #ifdef __i386__ | |
66 | int offset; | |
67 | ||
68 | if (!ypan) | |
69 | return -EINVAL; | |
70 | if (var->xoffset) | |
71 | return -EINVAL; | |
72 | if (var->yoffset > var->yres_virtual) | |
73 | return -EINVAL; | |
74 | if ((ypan==1) && var->yoffset+var->yres > var->yres_virtual) | |
75 | return -EINVAL; | |
76 | ||
77 | offset = (var->yoffset * info->fix.line_length + var->xoffset) / 4; | |
78 | ||
79 | __asm__ __volatile__( | |
80 | "call *(%%edi)" | |
81 | : /* no return value */ | |
82 | : "a" (0x4f07), /* EAX */ | |
83 | "b" (0), /* EBX */ | |
84 | "c" (offset), /* ECX */ | |
85 | "d" (offset >> 16), /* EDX */ | |
86 | "D" (&pmi_start)); /* EDI */ | |
87 | #endif | |
88 | return 0; | |
89 | } | |
90 | ||
d2d58384 AD |
91 | static int vesafb_blank(int blank, struct fb_info *info) |
92 | { | |
93 | int err = 1; | |
94 | ||
95 | if (vga_compat) { | |
96 | int loop = 10000; | |
97 | u8 seq = 0, crtc17 = 0; | |
98 | ||
bb7e257e | 99 | if (blank == FB_BLANK_POWERDOWN) { |
d2d58384 AD |
100 | seq = 0x20; |
101 | crtc17 = 0x00; | |
bb7e257e | 102 | err = 0; |
d2d58384 AD |
103 | } else { |
104 | seq = 0x00; | |
105 | crtc17 = 0x80; | |
bb7e257e | 106 | err = (blank == FB_BLANK_UNBLANK) ? 0 : -EINVAL; |
d2d58384 AD |
107 | } |
108 | ||
109 | vga_wseq(NULL, 0x00, 0x01); | |
110 | seq |= vga_rseq(NULL, 0x01) & ~0x20; | |
111 | vga_wseq(NULL, 0x00, seq); | |
112 | ||
113 | crtc17 |= vga_rcrt(NULL, 0x17) & ~0x80; | |
114 | while (loop--); | |
115 | vga_wcrt(NULL, 0x17, crtc17); | |
116 | vga_wseq(NULL, 0x00, 0x03); | |
117 | } | |
118 | ||
119 | return err; | |
120 | } | |
121 | ||
1da177e4 LT |
122 | static void vesa_setpalette(int regno, unsigned red, unsigned green, |
123 | unsigned blue) | |
124 | { | |
125 | #ifdef __i386__ | |
126 | struct { u_char blue, green, red, pad; } entry; | |
127 | int shift = 16 - depth; | |
128 | ||
129 | if (pmi_setpal) { | |
130 | entry.red = red >> shift; | |
131 | entry.green = green >> shift; | |
132 | entry.blue = blue >> shift; | |
133 | entry.pad = 0; | |
134 | __asm__ __volatile__( | |
135 | "call *(%%esi)" | |
136 | : /* no return value */ | |
137 | : "a" (0x4f09), /* EAX */ | |
138 | "b" (0), /* EBX */ | |
139 | "c" (1), /* ECX */ | |
140 | "d" (regno), /* EDX */ | |
141 | "D" (&entry), /* EDI */ | |
142 | "S" (&pmi_pal)); /* ESI */ | |
143 | } else { | |
144 | /* without protected mode interface, try VGA registers... */ | |
145 | outb_p(regno, dac_reg); | |
146 | outb_p(red >> shift, dac_val); | |
147 | outb_p(green >> shift, dac_val); | |
148 | outb_p(blue >> shift, dac_val); | |
149 | } | |
150 | #endif | |
151 | } | |
152 | ||
153 | static int vesafb_setcolreg(unsigned regno, unsigned red, unsigned green, | |
154 | unsigned blue, unsigned transp, | |
155 | struct fb_info *info) | |
156 | { | |
157 | /* | |
158 | * Set a single color register. The values supplied are | |
159 | * already rounded down to the hardware's capabilities | |
160 | * (according to the entries in the `var' structure). Return | |
161 | * != 0 for invalid regno. | |
162 | */ | |
163 | ||
164 | if (regno >= info->cmap.len) | |
165 | return 1; | |
166 | ||
167 | switch (info->var.bits_per_pixel) { | |
168 | case 8: | |
169 | vesa_setpalette(regno,red,green,blue); | |
170 | break; | |
171 | case 16: | |
172 | if (info->var.red.offset == 10) { | |
173 | /* 1:5:5:5 */ | |
174 | ((u32*) (info->pseudo_palette))[regno] = | |
175 | ((red & 0xf800) >> 1) | | |
176 | ((green & 0xf800) >> 6) | | |
177 | ((blue & 0xf800) >> 11); | |
178 | } else { | |
179 | /* 0:5:6:5 */ | |
180 | ((u32*) (info->pseudo_palette))[regno] = | |
181 | ((red & 0xf800) ) | | |
182 | ((green & 0xfc00) >> 5) | | |
183 | ((blue & 0xf800) >> 11); | |
184 | } | |
185 | break; | |
186 | case 24: | |
187 | red >>= 8; | |
188 | green >>= 8; | |
189 | blue >>= 8; | |
190 | ((u32 *)(info->pseudo_palette))[regno] = | |
191 | (red << info->var.red.offset) | | |
192 | (green << info->var.green.offset) | | |
193 | (blue << info->var.blue.offset); | |
194 | break; | |
195 | case 32: | |
196 | red >>= 8; | |
197 | green >>= 8; | |
198 | blue >>= 8; | |
199 | ((u32 *)(info->pseudo_palette))[regno] = | |
200 | (red << info->var.red.offset) | | |
201 | (green << info->var.green.offset) | | |
202 | (blue << info->var.blue.offset); | |
203 | break; | |
204 | } | |
205 | return 0; | |
206 | } | |
207 | ||
208 | static struct fb_ops vesafb_ops = { | |
209 | .owner = THIS_MODULE, | |
210 | .fb_setcolreg = vesafb_setcolreg, | |
211 | .fb_pan_display = vesafb_pan_display, | |
d2d58384 | 212 | .fb_blank = vesafb_blank, |
1da177e4 LT |
213 | .fb_fillrect = cfb_fillrect, |
214 | .fb_copyarea = cfb_copyarea, | |
215 | .fb_imageblit = cfb_imageblit, | |
216 | .fb_cursor = soft_cursor, | |
217 | }; | |
218 | ||
219 | static int __init vesafb_setup(char *options) | |
220 | { | |
221 | char *this_opt; | |
222 | ||
223 | if (!options || !*options) | |
224 | return 0; | |
225 | ||
226 | while ((this_opt = strsep(&options, ",")) != NULL) { | |
227 | if (!*this_opt) continue; | |
228 | ||
229 | if (! strcmp(this_opt, "inverse")) | |
230 | inverse=1; | |
231 | else if (! strcmp(this_opt, "redraw")) | |
232 | ypan=0; | |
233 | else if (! strcmp(this_opt, "ypan")) | |
234 | ypan=1; | |
235 | else if (! strcmp(this_opt, "ywrap")) | |
236 | ypan=2; | |
237 | else if (! strcmp(this_opt, "vgapal")) | |
238 | pmi_setpal=0; | |
239 | else if (! strcmp(this_opt, "pmipal")) | |
240 | pmi_setpal=1; | |
80625942 AD |
241 | else if (! strncmp(this_opt, "mtrr:", 5)) |
242 | mtrr = simple_strtoul(this_opt+5, NULL, 0); | |
1da177e4 LT |
243 | else if (! strcmp(this_opt, "nomtrr")) |
244 | mtrr=0; | |
245 | else if (! strncmp(this_opt, "vtotal:", 7)) | |
246 | vram_total = simple_strtoul(this_opt+7, NULL, 0); | |
247 | else if (! strncmp(this_opt, "vremap:", 7)) | |
248 | vram_remap = simple_strtoul(this_opt+7, NULL, 0); | |
249 | } | |
250 | return 0; | |
251 | } | |
252 | ||
253 | static int __init vesafb_probe(struct device *device) | |
254 | { | |
255 | struct platform_device *dev = to_platform_device(device); | |
256 | struct fb_info *info; | |
257 | int i, err; | |
258 | unsigned int size_vmode; | |
259 | unsigned int size_remap; | |
260 | unsigned int size_total; | |
261 | ||
262 | if (screen_info.orig_video_isVGA != VIDEO_TYPE_VLFB) | |
263 | return -ENODEV; | |
264 | ||
265 | vesafb_fix.smem_start = screen_info.lfb_base; | |
266 | vesafb_defined.bits_per_pixel = screen_info.lfb_depth; | |
267 | if (15 == vesafb_defined.bits_per_pixel) | |
268 | vesafb_defined.bits_per_pixel = 16; | |
269 | vesafb_defined.xres = screen_info.lfb_width; | |
270 | vesafb_defined.yres = screen_info.lfb_height; | |
271 | vesafb_fix.line_length = screen_info.lfb_linelength; | |
272 | vesafb_fix.visual = (vesafb_defined.bits_per_pixel == 8) ? | |
273 | FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR; | |
274 | ||
275 | /* size_vmode -- that is the amount of memory needed for the | |
276 | * used video mode, i.e. the minimum amount of | |
277 | * memory we need. */ | |
278 | size_vmode = vesafb_defined.yres * vesafb_fix.line_length; | |
279 | ||
280 | /* size_total -- all video memory we have. Used for mtrr | |
281 | * entries, ressource allocation and bounds | |
282 | * checking. */ | |
283 | size_total = screen_info.lfb_size * 65536; | |
284 | if (vram_total) | |
285 | size_total = vram_total * 1024 * 1024; | |
286 | if (size_total < size_vmode) | |
287 | size_total = size_vmode; | |
288 | ||
289 | /* size_remap -- the amount of video memory we are going to | |
290 | * use for vesafb. With modern cards it is no | |
291 | * option to simply use size_total as that | |
292 | * wastes plenty of kernel address space. */ | |
293 | size_remap = size_vmode * 2; | |
294 | if (vram_remap) | |
295 | size_remap = vram_remap * 1024 * 1024; | |
296 | if (size_remap < size_vmode) | |
297 | size_remap = size_vmode; | |
298 | if (size_remap > size_total) | |
299 | size_remap = size_total; | |
300 | vesafb_fix.smem_len = size_remap; | |
301 | ||
302 | #ifndef __i386__ | |
303 | screen_info.vesapm_seg = 0; | |
304 | #endif | |
305 | ||
306 | if (!request_mem_region(vesafb_fix.smem_start, size_total, "vesafb")) { | |
307 | printk(KERN_WARNING | |
78c03717 | 308 | "vesafb: cannot reserve video memory at 0x%lx\n", |
1da177e4 LT |
309 | vesafb_fix.smem_start); |
310 | /* We cannot make this fatal. Sometimes this comes from magic | |
311 | spaces our resource handlers simply don't know about */ | |
312 | } | |
313 | ||
314 | info = framebuffer_alloc(sizeof(u32) * 256, &dev->dev); | |
315 | if (!info) { | |
78c03717 | 316 | release_mem_region(vesafb_fix.smem_start, size_total); |
1da177e4 LT |
317 | return -ENOMEM; |
318 | } | |
319 | info->pseudo_palette = info->par; | |
320 | info->par = NULL; | |
321 | ||
78c03717 | 322 | info->screen_base = ioremap(vesafb_fix.smem_start, vesafb_fix.smem_len); |
1da177e4 LT |
323 | if (!info->screen_base) { |
324 | printk(KERN_ERR | |
325 | "vesafb: abort, cannot ioremap video memory 0x%x @ 0x%lx\n", | |
326 | vesafb_fix.smem_len, vesafb_fix.smem_start); | |
327 | err = -EIO; | |
328 | goto err; | |
329 | } | |
330 | ||
331 | printk(KERN_INFO "vesafb: framebuffer at 0x%lx, mapped to 0x%p, " | |
332 | "using %dk, total %dk\n", | |
333 | vesafb_fix.smem_start, info->screen_base, | |
334 | size_remap/1024, size_total/1024); | |
335 | printk(KERN_INFO "vesafb: mode is %dx%dx%d, linelength=%d, pages=%d\n", | |
336 | vesafb_defined.xres, vesafb_defined.yres, vesafb_defined.bits_per_pixel, vesafb_fix.line_length, screen_info.pages); | |
337 | ||
338 | if (screen_info.vesapm_seg) { | |
339 | printk(KERN_INFO "vesafb: protected mode interface info at %04x:%04x\n", | |
340 | screen_info.vesapm_seg,screen_info.vesapm_off); | |
341 | } | |
342 | ||
343 | if (screen_info.vesapm_seg < 0xc000) | |
344 | ypan = pmi_setpal = 0; /* not available or some DOS TSR ... */ | |
345 | ||
346 | if (ypan || pmi_setpal) { | |
347 | pmi_base = (unsigned short*)phys_to_virt(((unsigned long)screen_info.vesapm_seg << 4) + screen_info.vesapm_off); | |
348 | pmi_start = (void*)((char*)pmi_base + pmi_base[1]); | |
349 | pmi_pal = (void*)((char*)pmi_base + pmi_base[2]); | |
350 | printk(KERN_INFO "vesafb: pmi: set display start = %p, set palette = %p\n",pmi_start,pmi_pal); | |
351 | if (pmi_base[3]) { | |
352 | printk(KERN_INFO "vesafb: pmi: ports = "); | |
353 | for (i = pmi_base[3]/2; pmi_base[i] != 0xffff; i++) | |
354 | printk("%x ",pmi_base[i]); | |
355 | printk("\n"); | |
356 | if (pmi_base[i] != 0xffff) { | |
357 | /* | |
358 | * memory areas not supported (yet?) | |
359 | * | |
360 | * Rules are: we have to set up a descriptor for the requested | |
361 | * memory area and pass it in the ES register to the BIOS function. | |
362 | */ | |
363 | printk(KERN_INFO "vesafb: can't handle memory requests, pmi disabled\n"); | |
364 | ypan = pmi_setpal = 0; | |
365 | } | |
366 | } | |
367 | } | |
368 | ||
369 | vesafb_defined.xres_virtual = vesafb_defined.xres; | |
370 | vesafb_defined.yres_virtual = vesafb_fix.smem_len / vesafb_fix.line_length; | |
371 | if (ypan && vesafb_defined.yres_virtual > vesafb_defined.yres) { | |
372 | printk(KERN_INFO "vesafb: scrolling: %s using protected mode interface, yres_virtual=%d\n", | |
373 | (ypan > 1) ? "ywrap" : "ypan",vesafb_defined.yres_virtual); | |
374 | } else { | |
375 | printk(KERN_INFO "vesafb: scrolling: redraw\n"); | |
376 | vesafb_defined.yres_virtual = vesafb_defined.yres; | |
377 | ypan = 0; | |
378 | } | |
379 | ||
380 | /* some dummy values for timing to make fbset happy */ | |
381 | vesafb_defined.pixclock = 10000000 / vesafb_defined.xres * 1000 / vesafb_defined.yres; | |
382 | vesafb_defined.left_margin = (vesafb_defined.xres / 8) & 0xf8; | |
383 | vesafb_defined.hsync_len = (vesafb_defined.xres / 8) & 0xf8; | |
384 | ||
385 | vesafb_defined.red.offset = screen_info.red_pos; | |
386 | vesafb_defined.red.length = screen_info.red_size; | |
387 | vesafb_defined.green.offset = screen_info.green_pos; | |
388 | vesafb_defined.green.length = screen_info.green_size; | |
389 | vesafb_defined.blue.offset = screen_info.blue_pos; | |
390 | vesafb_defined.blue.length = screen_info.blue_size; | |
391 | vesafb_defined.transp.offset = screen_info.rsvd_pos; | |
392 | vesafb_defined.transp.length = screen_info.rsvd_size; | |
393 | ||
394 | if (vesafb_defined.bits_per_pixel <= 8) { | |
395 | depth = vesafb_defined.green.length; | |
396 | vesafb_defined.red.length = | |
397 | vesafb_defined.green.length = | |
398 | vesafb_defined.blue.length = | |
399 | vesafb_defined.bits_per_pixel; | |
400 | } | |
401 | ||
402 | printk(KERN_INFO "vesafb: %s: " | |
403 | "size=%d:%d:%d:%d, shift=%d:%d:%d:%d\n", | |
404 | (vesafb_defined.bits_per_pixel > 8) ? | |
405 | "Truecolor" : "Pseudocolor", | |
406 | screen_info.rsvd_size, | |
407 | screen_info.red_size, | |
408 | screen_info.green_size, | |
409 | screen_info.blue_size, | |
410 | screen_info.rsvd_pos, | |
411 | screen_info.red_pos, | |
412 | screen_info.green_pos, | |
413 | screen_info.blue_pos); | |
414 | ||
415 | vesafb_fix.ypanstep = ypan ? 1 : 0; | |
416 | vesafb_fix.ywrapstep = (ypan>1) ? 1 : 0; | |
417 | ||
418 | /* request failure does not faze us, as vgacon probably has this | |
419 | * region already (FIXME) */ | |
420 | request_region(0x3c0, 32, "vesafb"); | |
421 | ||
422 | if (mtrr) { | |
78c03717 | 423 | unsigned int temp_size = size_total; |
80625942 AD |
424 | unsigned int type = 0; |
425 | ||
426 | switch (mtrr) { | |
427 | case 1: | |
428 | type = MTRR_TYPE_UNCACHABLE; | |
429 | break; | |
430 | case 2: | |
431 | type = MTRR_TYPE_WRBACK; | |
432 | break; | |
433 | case 3: | |
434 | type = MTRR_TYPE_WRCOMB; | |
435 | break; | |
436 | case 4: | |
437 | type = MTRR_TYPE_WRTHROUGH; | |
438 | break; | |
439 | default: | |
440 | type = 0; | |
441 | break; | |
442 | } | |
443 | ||
444 | if (type) { | |
445 | int rc; | |
446 | ||
447 | /* Find the largest power-of-two */ | |
448 | while (temp_size & (temp_size - 1)) | |
449 | temp_size &= (temp_size - 1); | |
450 | ||
451 | /* Try and find a power of two to add */ | |
452 | do { | |
453 | rc = mtrr_add(vesafb_fix.smem_start, temp_size, | |
454 | type, 1); | |
455 | temp_size >>= 1; | |
456 | } while (temp_size >= PAGE_SIZE && rc == -EINVAL); | |
1da177e4 LT |
457 | } |
458 | } | |
459 | ||
460 | info->fbops = &vesafb_ops; | |
461 | info->var = vesafb_defined; | |
462 | info->fix = vesafb_fix; | |
463 | info->flags = FBINFO_FLAG_DEFAULT | | |
464 | (ypan) ? FBINFO_HWACCEL_YPAN : 0; | |
465 | ||
d2d58384 AD |
466 | vga_compat = (screen_info.capabilities & 2) ? 0 : 1; |
467 | printk("vesafb: Mode is %sVGA compatible\n", | |
468 | (vga_compat) ? "" : "not "); | |
469 | ||
1da177e4 LT |
470 | if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) { |
471 | err = -ENOMEM; | |
472 | goto err; | |
473 | } | |
474 | if (register_framebuffer(info)<0) { | |
475 | err = -EINVAL; | |
476 | fb_dealloc_cmap(&info->cmap); | |
477 | goto err; | |
478 | } | |
479 | printk(KERN_INFO "fb%d: %s frame buffer device\n", | |
480 | info->node, info->fix.id); | |
481 | return 0; | |
482 | err: | |
483 | framebuffer_release(info); | |
484 | release_mem_region(vesafb_fix.smem_start, size_total); | |
485 | return err; | |
486 | } | |
487 | ||
488 | static struct device_driver vesafb_driver = { | |
489 | .name = "vesafb", | |
490 | .bus = &platform_bus_type, | |
491 | .probe = vesafb_probe, | |
492 | }; | |
493 | ||
494 | static struct platform_device vesafb_device = { | |
495 | .name = "vesafb", | |
496 | }; | |
497 | ||
498 | static int __init vesafb_init(void) | |
499 | { | |
500 | int ret; | |
501 | char *option = NULL; | |
502 | ||
503 | /* ignore error return of fb_get_options */ | |
504 | fb_get_options("vesafb", &option); | |
505 | vesafb_setup(option); | |
506 | ret = driver_register(&vesafb_driver); | |
507 | ||
508 | if (!ret) { | |
509 | ret = platform_device_register(&vesafb_device); | |
510 | if (ret) | |
511 | driver_unregister(&vesafb_driver); | |
512 | } | |
513 | return ret; | |
514 | } | |
515 | module_init(vesafb_init); | |
516 | ||
517 | MODULE_LICENSE("GPL"); |