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