]>
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> | |
d052d1be RK |
22 | #include <linux/platform_device.h> |
23 | ||
d2d58384 | 24 | #include <video/vga.h> |
1da177e4 LT |
25 | #include <asm/io.h> |
26 | #include <asm/mtrr.h> | |
27 | ||
28 | #define dac_reg (0x3c8) | |
29 | #define dac_val (0x3c9) | |
30 | ||
31 | /* --------------------------------------------------------------------- */ | |
32 | ||
33 | static struct fb_var_screeninfo vesafb_defined __initdata = { | |
34 | .activate = FB_ACTIVATE_NOW, | |
35 | .height = -1, | |
36 | .width = -1, | |
37 | .right_margin = 32, | |
38 | .upper_margin = 16, | |
39 | .lower_margin = 4, | |
40 | .vsync_len = 4, | |
41 | .vmode = FB_VMODE_NONINTERLACED, | |
42 | }; | |
43 | ||
44 | static struct fb_fix_screeninfo vesafb_fix __initdata = { | |
45 | .id = "VESA VGA", | |
46 | .type = FB_TYPE_PACKED_PIXELS, | |
47 | .accel = FB_ACCEL_NONE, | |
48 | }; | |
49 | ||
50 | static int inverse = 0; | |
8a0934f2 | 51 | static int mtrr = 0; /* disable mtrr */ |
1da177e4 LT |
52 | static int vram_remap __initdata = 0; /* Set amount of memory to be used */ |
53 | static int vram_total __initdata = 0; /* Set total amount of memory */ | |
6dbde380 | 54 | static int pmi_setpal = 1; /* pmi for palette changes ??? */ |
1da177e4 LT |
55 | static int ypan = 0; /* 0..nothing, 1..ypan, 2..ywrap */ |
56 | static unsigned short *pmi_base = NULL; | |
57 | static void (*pmi_start)(void); | |
58 | static void (*pmi_pal)(void); | |
59 | static int depth; | |
89ec4c23 | 60 | static int vga_compat; |
1da177e4 LT |
61 | /* --------------------------------------------------------------------- */ |
62 | ||
63 | static int vesafb_pan_display(struct fb_var_screeninfo *var, | |
64 | struct fb_info *info) | |
65 | { | |
66 | #ifdef __i386__ | |
67 | int offset; | |
68 | ||
1da177e4 LT |
69 | offset = (var->yoffset * info->fix.line_length + var->xoffset) / 4; |
70 | ||
71 | __asm__ __volatile__( | |
72 | "call *(%%edi)" | |
73 | : /* no return value */ | |
74 | : "a" (0x4f07), /* EAX */ | |
75 | "b" (0), /* EBX */ | |
76 | "c" (offset), /* ECX */ | |
77 | "d" (offset >> 16), /* EDX */ | |
78 | "D" (&pmi_start)); /* EDI */ | |
79 | #endif | |
80 | return 0; | |
81 | } | |
82 | ||
313ca22f | 83 | static int vesa_setpalette(int regno, unsigned red, unsigned green, |
1da177e4 LT |
84 | unsigned blue) |
85 | { | |
89ec4c23 | 86 | int shift = 16 - depth; |
313ca22f | 87 | int err = -EINVAL; |
89ec4c23 | 88 | |
6dbde380 AD |
89 | /* |
90 | * Try VGA registers first... | |
91 | */ | |
92 | if (vga_compat) { | |
93 | outb_p(regno, dac_reg); | |
94 | outb_p(red >> shift, dac_val); | |
95 | outb_p(green >> shift, dac_val); | |
96 | outb_p(blue >> shift, dac_val); | |
97 | err = 0; | |
98 | } | |
99 | ||
1da177e4 | 100 | #ifdef __i386__ |
6dbde380 AD |
101 | /* |
102 | * Fallback to the PMI.... | |
103 | */ | |
104 | if (err && pmi_setpal) { | |
105 | struct { u_char blue, green, red, pad; } entry; | |
1da177e4 | 106 | |
1da177e4 LT |
107 | entry.red = red >> shift; |
108 | entry.green = green >> shift; | |
109 | entry.blue = blue >> shift; | |
110 | entry.pad = 0; | |
111 | __asm__ __volatile__( | |
112 | "call *(%%esi)" | |
113 | : /* no return value */ | |
114 | : "a" (0x4f09), /* EAX */ | |
115 | "b" (0), /* EBX */ | |
116 | "c" (1), /* ECX */ | |
117 | "d" (regno), /* EDX */ | |
118 | "D" (&entry), /* EDI */ | |
119 | "S" (&pmi_pal)); /* ESI */ | |
313ca22f | 120 | err = 0; |
89ec4c23 AD |
121 | } |
122 | #endif | |
123 | ||
313ca22f | 124 | return err; |
1da177e4 LT |
125 | } |
126 | ||
127 | static int vesafb_setcolreg(unsigned regno, unsigned red, unsigned green, | |
128 | unsigned blue, unsigned transp, | |
129 | struct fb_info *info) | |
130 | { | |
313ca22f AD |
131 | int err = 0; |
132 | ||
1da177e4 LT |
133 | /* |
134 | * Set a single color register. The values supplied are | |
135 | * already rounded down to the hardware's capabilities | |
136 | * (according to the entries in the `var' structure). Return | |
137 | * != 0 for invalid regno. | |
138 | */ | |
139 | ||
140 | if (regno >= info->cmap.len) | |
141 | return 1; | |
142 | ||
eba50850 | 143 | if (info->var.bits_per_pixel == 8) |
313ca22f | 144 | err = vesa_setpalette(regno,red,green,blue); |
eba50850 AD |
145 | else if (regno < 16) { |
146 | switch (info->var.bits_per_pixel) { | |
147 | case 16: | |
148 | if (info->var.red.offset == 10) { | |
149 | /* 1:5:5:5 */ | |
150 | ((u32*) (info->pseudo_palette))[regno] = | |
1da177e4 LT |
151 | ((red & 0xf800) >> 1) | |
152 | ((green & 0xf800) >> 6) | | |
153 | ((blue & 0xf800) >> 11); | |
eba50850 AD |
154 | } else { |
155 | /* 0:5:6:5 */ | |
156 | ((u32*) (info->pseudo_palette))[regno] = | |
1da177e4 LT |
157 | ((red & 0xf800) ) | |
158 | ((green & 0xfc00) >> 5) | | |
159 | ((blue & 0xf800) >> 11); | |
eba50850 AD |
160 | } |
161 | break; | |
162 | case 24: | |
163 | case 32: | |
164 | red >>= 8; | |
165 | green >>= 8; | |
166 | blue >>= 8; | |
167 | ((u32 *)(info->pseudo_palette))[regno] = | |
168 | (red << info->var.red.offset) | | |
169 | (green << info->var.green.offset) | | |
170 | (blue << info->var.blue.offset); | |
171 | break; | |
1da177e4 | 172 | } |
eba50850 AD |
173 | } |
174 | ||
313ca22f | 175 | return err; |
1da177e4 LT |
176 | } |
177 | ||
178 | static struct fb_ops vesafb_ops = { | |
179 | .owner = THIS_MODULE, | |
180 | .fb_setcolreg = vesafb_setcolreg, | |
181 | .fb_pan_display = vesafb_pan_display, | |
182 | .fb_fillrect = cfb_fillrect, | |
183 | .fb_copyarea = cfb_copyarea, | |
184 | .fb_imageblit = cfb_imageblit, | |
1da177e4 LT |
185 | }; |
186 | ||
187 | static int __init vesafb_setup(char *options) | |
188 | { | |
189 | char *this_opt; | |
190 | ||
191 | if (!options || !*options) | |
192 | return 0; | |
193 | ||
194 | while ((this_opt = strsep(&options, ",")) != NULL) { | |
195 | if (!*this_opt) continue; | |
196 | ||
197 | if (! strcmp(this_opt, "inverse")) | |
198 | inverse=1; | |
199 | else if (! strcmp(this_opt, "redraw")) | |
200 | ypan=0; | |
201 | else if (! strcmp(this_opt, "ypan")) | |
202 | ypan=1; | |
203 | else if (! strcmp(this_opt, "ywrap")) | |
204 | ypan=2; | |
205 | else if (! strcmp(this_opt, "vgapal")) | |
206 | pmi_setpal=0; | |
207 | else if (! strcmp(this_opt, "pmipal")) | |
208 | pmi_setpal=1; | |
80625942 AD |
209 | else if (! strncmp(this_opt, "mtrr:", 5)) |
210 | mtrr = simple_strtoul(this_opt+5, NULL, 0); | |
1da177e4 LT |
211 | else if (! strcmp(this_opt, "nomtrr")) |
212 | mtrr=0; | |
213 | else if (! strncmp(this_opt, "vtotal:", 7)) | |
214 | vram_total = simple_strtoul(this_opt+7, NULL, 0); | |
215 | else if (! strncmp(this_opt, "vremap:", 7)) | |
216 | vram_remap = simple_strtoul(this_opt+7, NULL, 0); | |
217 | } | |
218 | return 0; | |
219 | } | |
220 | ||
3ae5eaec | 221 | static int __init vesafb_probe(struct platform_device *dev) |
1da177e4 | 222 | { |
1da177e4 LT |
223 | struct fb_info *info; |
224 | int i, err; | |
225 | unsigned int size_vmode; | |
226 | unsigned int size_remap; | |
227 | unsigned int size_total; | |
228 | ||
229 | if (screen_info.orig_video_isVGA != VIDEO_TYPE_VLFB) | |
230 | return -ENODEV; | |
231 | ||
89ec4c23 | 232 | vga_compat = (screen_info.capabilities & 2) ? 0 : 1; |
1da177e4 LT |
233 | vesafb_fix.smem_start = screen_info.lfb_base; |
234 | vesafb_defined.bits_per_pixel = screen_info.lfb_depth; | |
235 | if (15 == vesafb_defined.bits_per_pixel) | |
236 | vesafb_defined.bits_per_pixel = 16; | |
237 | vesafb_defined.xres = screen_info.lfb_width; | |
238 | vesafb_defined.yres = screen_info.lfb_height; | |
239 | vesafb_fix.line_length = screen_info.lfb_linelength; | |
240 | vesafb_fix.visual = (vesafb_defined.bits_per_pixel == 8) ? | |
241 | FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR; | |
242 | ||
243 | /* size_vmode -- that is the amount of memory needed for the | |
244 | * used video mode, i.e. the minimum amount of | |
245 | * memory we need. */ | |
246 | size_vmode = vesafb_defined.yres * vesafb_fix.line_length; | |
247 | ||
248 | /* size_total -- all video memory we have. Used for mtrr | |
249 | * entries, ressource allocation and bounds | |
250 | * checking. */ | |
251 | size_total = screen_info.lfb_size * 65536; | |
252 | if (vram_total) | |
253 | size_total = vram_total * 1024 * 1024; | |
254 | if (size_total < size_vmode) | |
255 | size_total = size_vmode; | |
256 | ||
257 | /* size_remap -- the amount of video memory we are going to | |
258 | * use for vesafb. With modern cards it is no | |
259 | * option to simply use size_total as that | |
260 | * wastes plenty of kernel address space. */ | |
261 | size_remap = size_vmode * 2; | |
262 | if (vram_remap) | |
263 | size_remap = vram_remap * 1024 * 1024; | |
264 | if (size_remap < size_vmode) | |
265 | size_remap = size_vmode; | |
266 | if (size_remap > size_total) | |
267 | size_remap = size_total; | |
268 | vesafb_fix.smem_len = size_remap; | |
269 | ||
270 | #ifndef __i386__ | |
271 | screen_info.vesapm_seg = 0; | |
272 | #endif | |
273 | ||
274 | if (!request_mem_region(vesafb_fix.smem_start, size_total, "vesafb")) { | |
275 | printk(KERN_WARNING | |
78c03717 | 276 | "vesafb: cannot reserve video memory at 0x%lx\n", |
1da177e4 LT |
277 | vesafb_fix.smem_start); |
278 | /* We cannot make this fatal. Sometimes this comes from magic | |
279 | spaces our resource handlers simply don't know about */ | |
280 | } | |
281 | ||
282 | info = framebuffer_alloc(sizeof(u32) * 256, &dev->dev); | |
283 | if (!info) { | |
78c03717 | 284 | release_mem_region(vesafb_fix.smem_start, size_total); |
1da177e4 LT |
285 | return -ENOMEM; |
286 | } | |
287 | info->pseudo_palette = info->par; | |
288 | info->par = NULL; | |
289 | ||
78c03717 | 290 | info->screen_base = ioremap(vesafb_fix.smem_start, vesafb_fix.smem_len); |
1da177e4 LT |
291 | if (!info->screen_base) { |
292 | printk(KERN_ERR | |
293 | "vesafb: abort, cannot ioremap video memory 0x%x @ 0x%lx\n", | |
294 | vesafb_fix.smem_len, vesafb_fix.smem_start); | |
295 | err = -EIO; | |
296 | goto err; | |
297 | } | |
298 | ||
299 | printk(KERN_INFO "vesafb: framebuffer at 0x%lx, mapped to 0x%p, " | |
300 | "using %dk, total %dk\n", | |
301 | vesafb_fix.smem_start, info->screen_base, | |
302 | size_remap/1024, size_total/1024); | |
303 | printk(KERN_INFO "vesafb: mode is %dx%dx%d, linelength=%d, pages=%d\n", | |
304 | vesafb_defined.xres, vesafb_defined.yres, vesafb_defined.bits_per_pixel, vesafb_fix.line_length, screen_info.pages); | |
305 | ||
306 | if (screen_info.vesapm_seg) { | |
307 | printk(KERN_INFO "vesafb: protected mode interface info at %04x:%04x\n", | |
308 | screen_info.vesapm_seg,screen_info.vesapm_off); | |
309 | } | |
310 | ||
311 | if (screen_info.vesapm_seg < 0xc000) | |
312 | ypan = pmi_setpal = 0; /* not available or some DOS TSR ... */ | |
313 | ||
314 | if (ypan || pmi_setpal) { | |
315 | pmi_base = (unsigned short*)phys_to_virt(((unsigned long)screen_info.vesapm_seg << 4) + screen_info.vesapm_off); | |
316 | pmi_start = (void*)((char*)pmi_base + pmi_base[1]); | |
317 | pmi_pal = (void*)((char*)pmi_base + pmi_base[2]); | |
318 | printk(KERN_INFO "vesafb: pmi: set display start = %p, set palette = %p\n",pmi_start,pmi_pal); | |
319 | if (pmi_base[3]) { | |
320 | printk(KERN_INFO "vesafb: pmi: ports = "); | |
321 | for (i = pmi_base[3]/2; pmi_base[i] != 0xffff; i++) | |
322 | printk("%x ",pmi_base[i]); | |
323 | printk("\n"); | |
324 | if (pmi_base[i] != 0xffff) { | |
325 | /* | |
326 | * memory areas not supported (yet?) | |
327 | * | |
328 | * Rules are: we have to set up a descriptor for the requested | |
329 | * memory area and pass it in the ES register to the BIOS function. | |
330 | */ | |
331 | printk(KERN_INFO "vesafb: can't handle memory requests, pmi disabled\n"); | |
332 | ypan = pmi_setpal = 0; | |
333 | } | |
334 | } | |
335 | } | |
336 | ||
89ec4c23 AD |
337 | if (vesafb_defined.bits_per_pixel == 8 && !pmi_setpal && !vga_compat) { |
338 | printk(KERN_WARNING "vesafb: hardware palette is unchangeable,\n" | |
339 | " colors may be incorrect\n"); | |
340 | vesafb_fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR; | |
341 | } | |
342 | ||
1da177e4 LT |
343 | vesafb_defined.xres_virtual = vesafb_defined.xres; |
344 | vesafb_defined.yres_virtual = vesafb_fix.smem_len / vesafb_fix.line_length; | |
345 | if (ypan && vesafb_defined.yres_virtual > vesafb_defined.yres) { | |
346 | printk(KERN_INFO "vesafb: scrolling: %s using protected mode interface, yres_virtual=%d\n", | |
347 | (ypan > 1) ? "ywrap" : "ypan",vesafb_defined.yres_virtual); | |
348 | } else { | |
349 | printk(KERN_INFO "vesafb: scrolling: redraw\n"); | |
350 | vesafb_defined.yres_virtual = vesafb_defined.yres; | |
351 | ypan = 0; | |
352 | } | |
353 | ||
354 | /* some dummy values for timing to make fbset happy */ | |
355 | vesafb_defined.pixclock = 10000000 / vesafb_defined.xres * 1000 / vesafb_defined.yres; | |
356 | vesafb_defined.left_margin = (vesafb_defined.xres / 8) & 0xf8; | |
357 | vesafb_defined.hsync_len = (vesafb_defined.xres / 8) & 0xf8; | |
358 | ||
359 | vesafb_defined.red.offset = screen_info.red_pos; | |
360 | vesafb_defined.red.length = screen_info.red_size; | |
361 | vesafb_defined.green.offset = screen_info.green_pos; | |
362 | vesafb_defined.green.length = screen_info.green_size; | |
363 | vesafb_defined.blue.offset = screen_info.blue_pos; | |
364 | vesafb_defined.blue.length = screen_info.blue_size; | |
365 | vesafb_defined.transp.offset = screen_info.rsvd_pos; | |
366 | vesafb_defined.transp.length = screen_info.rsvd_size; | |
367 | ||
368 | if (vesafb_defined.bits_per_pixel <= 8) { | |
369 | depth = vesafb_defined.green.length; | |
370 | vesafb_defined.red.length = | |
371 | vesafb_defined.green.length = | |
372 | vesafb_defined.blue.length = | |
373 | vesafb_defined.bits_per_pixel; | |
374 | } | |
375 | ||
376 | printk(KERN_INFO "vesafb: %s: " | |
377 | "size=%d:%d:%d:%d, shift=%d:%d:%d:%d\n", | |
378 | (vesafb_defined.bits_per_pixel > 8) ? | |
89ec4c23 AD |
379 | "Truecolor" : (vga_compat || pmi_setpal) ? |
380 | "Pseudocolor" : "Static Pseudocolor", | |
1da177e4 LT |
381 | screen_info.rsvd_size, |
382 | screen_info.red_size, | |
383 | screen_info.green_size, | |
384 | screen_info.blue_size, | |
385 | screen_info.rsvd_pos, | |
386 | screen_info.red_pos, | |
387 | screen_info.green_pos, | |
388 | screen_info.blue_pos); | |
389 | ||
390 | vesafb_fix.ypanstep = ypan ? 1 : 0; | |
391 | vesafb_fix.ywrapstep = (ypan>1) ? 1 : 0; | |
392 | ||
393 | /* request failure does not faze us, as vgacon probably has this | |
394 | * region already (FIXME) */ | |
395 | request_region(0x3c0, 32, "vesafb"); | |
396 | ||
f5f4917c | 397 | #ifdef CONFIG_MTRR |
1da177e4 | 398 | if (mtrr) { |
78c03717 | 399 | unsigned int temp_size = size_total; |
80625942 AD |
400 | unsigned int type = 0; |
401 | ||
402 | switch (mtrr) { | |
403 | case 1: | |
404 | type = MTRR_TYPE_UNCACHABLE; | |
405 | break; | |
406 | case 2: | |
407 | type = MTRR_TYPE_WRBACK; | |
408 | break; | |
409 | case 3: | |
410 | type = MTRR_TYPE_WRCOMB; | |
411 | break; | |
412 | case 4: | |
413 | type = MTRR_TYPE_WRTHROUGH; | |
414 | break; | |
415 | default: | |
416 | type = 0; | |
417 | break; | |
418 | } | |
419 | ||
420 | if (type) { | |
421 | int rc; | |
422 | ||
423 | /* Find the largest power-of-two */ | |
424 | while (temp_size & (temp_size - 1)) | |
425 | temp_size &= (temp_size - 1); | |
426 | ||
427 | /* Try and find a power of two to add */ | |
428 | do { | |
429 | rc = mtrr_add(vesafb_fix.smem_start, temp_size, | |
430 | type, 1); | |
431 | temp_size >>= 1; | |
432 | } while (temp_size >= PAGE_SIZE && rc == -EINVAL); | |
1da177e4 LT |
433 | } |
434 | } | |
f5f4917c | 435 | #endif |
1da177e4 LT |
436 | |
437 | info->fbops = &vesafb_ops; | |
438 | info->var = vesafb_defined; | |
439 | info->fix = vesafb_fix; | |
440 | info->flags = FBINFO_FLAG_DEFAULT | | |
441 | (ypan) ? FBINFO_HWACCEL_YPAN : 0; | |
442 | ||
e53f87a0 AD |
443 | if (!ypan) |
444 | info->fbops->fb_pan_display = NULL; | |
445 | ||
1da177e4 LT |
446 | if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) { |
447 | err = -ENOMEM; | |
448 | goto err; | |
449 | } | |
450 | if (register_framebuffer(info)<0) { | |
451 | err = -EINVAL; | |
452 | fb_dealloc_cmap(&info->cmap); | |
453 | goto err; | |
454 | } | |
455 | printk(KERN_INFO "fb%d: %s frame buffer device\n", | |
456 | info->node, info->fix.id); | |
457 | return 0; | |
458 | err: | |
459 | framebuffer_release(info); | |
460 | release_mem_region(vesafb_fix.smem_start, size_total); | |
461 | return err; | |
462 | } | |
463 | ||
3ae5eaec | 464 | static struct platform_driver vesafb_driver = { |
1da177e4 | 465 | .probe = vesafb_probe, |
3ae5eaec RK |
466 | .driver = { |
467 | .name = "vesafb", | |
468 | }, | |
1da177e4 LT |
469 | }; |
470 | ||
103edf02 | 471 | static struct platform_device *vesafb_device; |
1da177e4 LT |
472 | |
473 | static int __init vesafb_init(void) | |
474 | { | |
475 | int ret; | |
476 | char *option = NULL; | |
477 | ||
478 | /* ignore error return of fb_get_options */ | |
479 | fb_get_options("vesafb", &option); | |
480 | vesafb_setup(option); | |
3ae5eaec | 481 | ret = platform_driver_register(&vesafb_driver); |
1da177e4 LT |
482 | |
483 | if (!ret) { | |
103edf02 AD |
484 | vesafb_device = platform_device_alloc("vesafb", 0); |
485 | ||
486 | if (vesafb_device) | |
487 | ret = platform_device_add(vesafb_device); | |
488 | else | |
489 | ret = -ENOMEM; | |
490 | ||
491 | if (ret) { | |
492 | platform_device_put(vesafb_device); | |
3ae5eaec | 493 | platform_driver_unregister(&vesafb_driver); |
103edf02 | 494 | } |
1da177e4 | 495 | } |
103edf02 | 496 | |
1da177e4 LT |
497 | return ret; |
498 | } | |
499 | module_init(vesafb_init); | |
500 | ||
501 | MODULE_LICENSE("GPL"); |