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Diffstat (limited to 'drivers/video/vesafb.c')
-rw-r--r--drivers/video/vesafb.c456
1 files changed, 456 insertions, 0 deletions
diff --git a/drivers/video/vesafb.c b/drivers/video/vesafb.c
new file mode 100644
index 000000000000..8fc1278d7fbd
--- /dev/null
+++ b/drivers/video/vesafb.c
@@ -0,0 +1,456 @@
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#ifdef __i386__
23#include <video/edid.h>
24#endif
25#include <asm/io.h>
26#include <asm/mtrr.h>
27
28#define dac_reg (0x3c8)
29#define dac_val (0x3c9)
30
31/* --------------------------------------------------------------------- */
32
33static 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
44static struct fb_fix_screeninfo vesafb_fix __initdata = {
45 .id = "VESA VGA",
46 .type = FB_TYPE_PACKED_PIXELS,
47 .accel = FB_ACCEL_NONE,
48};
49
50static int inverse = 0;
51static int mtrr = 1;
52static int vram_remap __initdata = 0; /* Set amount of memory to be used */
53static int vram_total __initdata = 0; /* Set total amount of memory */
54static int pmi_setpal = 0; /* pmi for palette changes ??? */
55static int ypan = 0; /* 0..nothing, 1..ypan, 2..ywrap */
56static unsigned short *pmi_base = NULL;
57static void (*pmi_start)(void);
58static void (*pmi_pal)(void);
59static int depth;
60
61/* --------------------------------------------------------------------- */
62
63static int vesafb_pan_display(struct fb_var_screeninfo *var,
64 struct fb_info *info)
65{
66#ifdef __i386__
67 int offset;
68
69 if (!ypan)
70 return -EINVAL;
71 if (var->xoffset)
72 return -EINVAL;
73 if (var->yoffset > var->yres_virtual)
74 return -EINVAL;
75 if ((ypan==1) && var->yoffset+var->yres > var->yres_virtual)
76 return -EINVAL;
77
78 offset = (var->yoffset * info->fix.line_length + var->xoffset) / 4;
79
80 __asm__ __volatile__(
81 "call *(%%edi)"
82 : /* no return value */
83 : "a" (0x4f07), /* EAX */
84 "b" (0), /* EBX */
85 "c" (offset), /* ECX */
86 "d" (offset >> 16), /* EDX */
87 "D" (&pmi_start)); /* EDI */
88#endif
89 return 0;
90}
91
92static void vesa_setpalette(int regno, unsigned red, unsigned green,
93 unsigned blue)
94{
95#ifdef __i386__
96 struct { u_char blue, green, red, pad; } entry;
97 int shift = 16 - depth;
98
99 if (pmi_setpal) {
100 entry.red = red >> shift;
101 entry.green = green >> shift;
102 entry.blue = blue >> shift;
103 entry.pad = 0;
104 __asm__ __volatile__(
105 "call *(%%esi)"
106 : /* no return value */
107 : "a" (0x4f09), /* EAX */
108 "b" (0), /* EBX */
109 "c" (1), /* ECX */
110 "d" (regno), /* EDX */
111 "D" (&entry), /* EDI */
112 "S" (&pmi_pal)); /* ESI */
113 } else {
114 /* without protected mode interface, try VGA registers... */
115 outb_p(regno, dac_reg);
116 outb_p(red >> shift, dac_val);
117 outb_p(green >> shift, dac_val);
118 outb_p(blue >> shift, dac_val);
119 }
120#endif
121}
122
123static int vesafb_setcolreg(unsigned regno, unsigned red, unsigned green,
124 unsigned blue, unsigned transp,
125 struct fb_info *info)
126{
127 /*
128 * Set a single color register. The values supplied are
129 * already rounded down to the hardware's capabilities
130 * (according to the entries in the `var' structure). Return
131 * != 0 for invalid regno.
132 */
133
134 if (regno >= info->cmap.len)
135 return 1;
136
137 switch (info->var.bits_per_pixel) {
138 case 8:
139 vesa_setpalette(regno,red,green,blue);
140 break;
141 case 16:
142 if (info->var.red.offset == 10) {
143 /* 1:5:5:5 */
144 ((u32*) (info->pseudo_palette))[regno] =
145 ((red & 0xf800) >> 1) |
146 ((green & 0xf800) >> 6) |
147 ((blue & 0xf800) >> 11);
148 } else {
149 /* 0:5:6:5 */
150 ((u32*) (info->pseudo_palette))[regno] =
151 ((red & 0xf800) ) |
152 ((green & 0xfc00) >> 5) |
153 ((blue & 0xf800) >> 11);
154 }
155 break;
156 case 24:
157 red >>= 8;
158 green >>= 8;
159 blue >>= 8;
160 ((u32 *)(info->pseudo_palette))[regno] =
161 (red << info->var.red.offset) |
162 (green << info->var.green.offset) |
163 (blue << info->var.blue.offset);
164 break;
165 case 32:
166 red >>= 8;
167 green >>= 8;
168 blue >>= 8;
169 ((u32 *)(info->pseudo_palette))[regno] =
170 (red << info->var.red.offset) |
171 (green << info->var.green.offset) |
172 (blue << info->var.blue.offset);
173 break;
174 }
175 return 0;
176}
177
178static 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,
185 .fb_cursor = soft_cursor,
186};
187
188static int __init vesafb_setup(char *options)
189{
190 char *this_opt;
191
192 if (!options || !*options)
193 return 0;
194
195 while ((this_opt = strsep(&options, ",")) != NULL) {
196 if (!*this_opt) continue;
197
198 if (! strcmp(this_opt, "inverse"))
199 inverse=1;
200 else if (! strcmp(this_opt, "redraw"))
201 ypan=0;
202 else if (! strcmp(this_opt, "ypan"))
203 ypan=1;
204 else if (! strcmp(this_opt, "ywrap"))
205 ypan=2;
206 else if (! strcmp(this_opt, "vgapal"))
207 pmi_setpal=0;
208 else if (! strcmp(this_opt, "pmipal"))
209 pmi_setpal=1;
210 else if (! strcmp(this_opt, "mtrr"))
211 mtrr=1;
212 else if (! strcmp(this_opt, "nomtrr"))
213 mtrr=0;
214 else if (! strncmp(this_opt, "vtotal:", 7))
215 vram_total = simple_strtoul(this_opt+7, NULL, 0);
216 else if (! strncmp(this_opt, "vremap:", 7))
217 vram_remap = simple_strtoul(this_opt+7, NULL, 0);
218 }
219 return 0;
220}
221
222static int __init vesafb_probe(struct device *device)
223{
224 struct platform_device *dev = to_platform_device(device);
225 struct fb_info *info;
226 int i, err;
227 unsigned int size_vmode;
228 unsigned int size_remap;
229 unsigned int size_total;
230
231 if (screen_info.orig_video_isVGA != VIDEO_TYPE_VLFB)
232 return -ENODEV;
233
234 vesafb_fix.smem_start = screen_info.lfb_base;
235 vesafb_defined.bits_per_pixel = screen_info.lfb_depth;
236 if (15 == vesafb_defined.bits_per_pixel)
237 vesafb_defined.bits_per_pixel = 16;
238 vesafb_defined.xres = screen_info.lfb_width;
239 vesafb_defined.yres = screen_info.lfb_height;
240 vesafb_fix.line_length = screen_info.lfb_linelength;
241 vesafb_fix.visual = (vesafb_defined.bits_per_pixel == 8) ?
242 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
243
244 /* size_vmode -- that is the amount of memory needed for the
245 * used video mode, i.e. the minimum amount of
246 * memory we need. */
247 size_vmode = vesafb_defined.yres * vesafb_fix.line_length;
248
249 /* size_total -- all video memory we have. Used for mtrr
250 * entries, ressource allocation and bounds
251 * checking. */
252 size_total = screen_info.lfb_size * 65536;
253 if (vram_total)
254 size_total = vram_total * 1024 * 1024;
255 if (size_total < size_vmode)
256 size_total = size_vmode;
257
258 /* size_remap -- the amount of video memory we are going to
259 * use for vesafb. With modern cards it is no
260 * option to simply use size_total as that
261 * wastes plenty of kernel address space. */
262 size_remap = size_vmode * 2;
263 if (vram_remap)
264 size_remap = vram_remap * 1024 * 1024;
265 if (size_remap < size_vmode)
266 size_remap = size_vmode;
267 if (size_remap > size_total)
268 size_remap = size_total;
269 vesafb_fix.smem_len = size_remap;
270
271#ifndef __i386__
272 screen_info.vesapm_seg = 0;
273#endif
274
275 if (!request_mem_region(vesafb_fix.smem_start, size_total, "vesafb")) {
276 printk(KERN_WARNING
277 "vesafb: abort, cannot reserve video memory at 0x%lx\n",
278 vesafb_fix.smem_start);
279 /* We cannot make this fatal. Sometimes this comes from magic
280 spaces our resource handlers simply don't know about */
281 }
282
283 info = framebuffer_alloc(sizeof(u32) * 256, &dev->dev);
284 if (!info) {
285 release_mem_region(vesafb_fix.smem_start, vesafb_fix.smem_len);
286 return -ENOMEM;
287 }
288 info->pseudo_palette = info->par;
289 info->par = NULL;
290
291 info->screen_base = ioremap(vesafb_fix.smem_start, vesafb_fix.smem_len);
292 if (!info->screen_base) {
293 printk(KERN_ERR
294 "vesafb: abort, cannot ioremap video memory 0x%x @ 0x%lx\n",
295 vesafb_fix.smem_len, vesafb_fix.smem_start);
296 err = -EIO;
297 goto err;
298 }
299
300 printk(KERN_INFO "vesafb: framebuffer at 0x%lx, mapped to 0x%p, "
301 "using %dk, total %dk\n",
302 vesafb_fix.smem_start, info->screen_base,
303 size_remap/1024, size_total/1024);
304 printk(KERN_INFO "vesafb: mode is %dx%dx%d, linelength=%d, pages=%d\n",
305 vesafb_defined.xres, vesafb_defined.yres, vesafb_defined.bits_per_pixel, vesafb_fix.line_length, screen_info.pages);
306
307 if (screen_info.vesapm_seg) {
308 printk(KERN_INFO "vesafb: protected mode interface info at %04x:%04x\n",
309 screen_info.vesapm_seg,screen_info.vesapm_off);
310 }
311
312 if (screen_info.vesapm_seg < 0xc000)
313 ypan = pmi_setpal = 0; /* not available or some DOS TSR ... */
314
315 if (ypan || pmi_setpal) {
316 pmi_base = (unsigned short*)phys_to_virt(((unsigned long)screen_info.vesapm_seg << 4) + screen_info.vesapm_off);
317 pmi_start = (void*)((char*)pmi_base + pmi_base[1]);
318 pmi_pal = (void*)((char*)pmi_base + pmi_base[2]);
319 printk(KERN_INFO "vesafb: pmi: set display start = %p, set palette = %p\n",pmi_start,pmi_pal);
320 if (pmi_base[3]) {
321 printk(KERN_INFO "vesafb: pmi: ports = ");
322 for (i = pmi_base[3]/2; pmi_base[i] != 0xffff; i++)
323 printk("%x ",pmi_base[i]);
324 printk("\n");
325 if (pmi_base[i] != 0xffff) {
326 /*
327 * memory areas not supported (yet?)
328 *
329 * Rules are: we have to set up a descriptor for the requested
330 * memory area and pass it in the ES register to the BIOS function.
331 */
332 printk(KERN_INFO "vesafb: can't handle memory requests, pmi disabled\n");
333 ypan = pmi_setpal = 0;
334 }
335 }
336 }
337
338 vesafb_defined.xres_virtual = vesafb_defined.xres;
339 vesafb_defined.yres_virtual = vesafb_fix.smem_len / vesafb_fix.line_length;
340 if (ypan && vesafb_defined.yres_virtual > vesafb_defined.yres) {
341 printk(KERN_INFO "vesafb: scrolling: %s using protected mode interface, yres_virtual=%d\n",
342 (ypan > 1) ? "ywrap" : "ypan",vesafb_defined.yres_virtual);
343 } else {
344 printk(KERN_INFO "vesafb: scrolling: redraw\n");
345 vesafb_defined.yres_virtual = vesafb_defined.yres;
346 ypan = 0;
347 }
348
349 /* some dummy values for timing to make fbset happy */
350 vesafb_defined.pixclock = 10000000 / vesafb_defined.xres * 1000 / vesafb_defined.yres;
351 vesafb_defined.left_margin = (vesafb_defined.xres / 8) & 0xf8;
352 vesafb_defined.hsync_len = (vesafb_defined.xres / 8) & 0xf8;
353
354 vesafb_defined.red.offset = screen_info.red_pos;
355 vesafb_defined.red.length = screen_info.red_size;
356 vesafb_defined.green.offset = screen_info.green_pos;
357 vesafb_defined.green.length = screen_info.green_size;
358 vesafb_defined.blue.offset = screen_info.blue_pos;
359 vesafb_defined.blue.length = screen_info.blue_size;
360 vesafb_defined.transp.offset = screen_info.rsvd_pos;
361 vesafb_defined.transp.length = screen_info.rsvd_size;
362
363 if (vesafb_defined.bits_per_pixel <= 8) {
364 depth = vesafb_defined.green.length;
365 vesafb_defined.red.length =
366 vesafb_defined.green.length =
367 vesafb_defined.blue.length =
368 vesafb_defined.bits_per_pixel;
369 }
370
371 printk(KERN_INFO "vesafb: %s: "
372 "size=%d:%d:%d:%d, shift=%d:%d:%d:%d\n",
373 (vesafb_defined.bits_per_pixel > 8) ?
374 "Truecolor" : "Pseudocolor",
375 screen_info.rsvd_size,
376 screen_info.red_size,
377 screen_info.green_size,
378 screen_info.blue_size,
379 screen_info.rsvd_pos,
380 screen_info.red_pos,
381 screen_info.green_pos,
382 screen_info.blue_pos);
383
384 vesafb_fix.ypanstep = ypan ? 1 : 0;
385 vesafb_fix.ywrapstep = (ypan>1) ? 1 : 0;
386
387 /* request failure does not faze us, as vgacon probably has this
388 * region already (FIXME) */
389 request_region(0x3c0, 32, "vesafb");
390
391 if (mtrr) {
392 int temp_size = size_total;
393 /* Find the largest power-of-two */
394 while (temp_size & (temp_size - 1))
395 temp_size &= (temp_size - 1);
396
397 /* Try and find a power of two to add */
398 while (temp_size && mtrr_add(vesafb_fix.smem_start, temp_size, MTRR_TYPE_WRCOMB, 1)==-EINVAL) {
399 temp_size >>= 1;
400 }
401 }
402
403 info->fbops = &vesafb_ops;
404 info->var = vesafb_defined;
405 info->fix = vesafb_fix;
406 info->flags = FBINFO_FLAG_DEFAULT |
407 (ypan) ? FBINFO_HWACCEL_YPAN : 0;
408
409 if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
410 err = -ENOMEM;
411 goto err;
412 }
413 if (register_framebuffer(info)<0) {
414 err = -EINVAL;
415 fb_dealloc_cmap(&info->cmap);
416 goto err;
417 }
418 printk(KERN_INFO "fb%d: %s frame buffer device\n",
419 info->node, info->fix.id);
420 return 0;
421err:
422 framebuffer_release(info);
423 release_mem_region(vesafb_fix.smem_start, size_total);
424 return err;
425}
426
427static struct device_driver vesafb_driver = {
428 .name = "vesafb",
429 .bus = &platform_bus_type,
430 .probe = vesafb_probe,
431};
432
433static struct platform_device vesafb_device = {
434 .name = "vesafb",
435};
436
437static int __init vesafb_init(void)
438{
439 int ret;
440 char *option = NULL;
441
442 /* ignore error return of fb_get_options */
443 fb_get_options("vesafb", &option);
444 vesafb_setup(option);
445 ret = driver_register(&vesafb_driver);
446
447 if (!ret) {
448 ret = platform_device_register(&vesafb_device);
449 if (ret)
450 driver_unregister(&vesafb_driver);
451 }
452 return ret;
453}
454module_init(vesafb_init);
455
456MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-23 16:38:00 -0500