blob: f3069b01e248efa1eaf86e00fec16ff6047fc048 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include <asm/io.h>
23#include <asm/mtrr.h>
24
25#define dac_reg (0x3c8)
26#define dac_val (0x3c9)
27
28/* --------------------------------------------------------------------- */
29
30static 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
41static struct fb_fix_screeninfo vesafb_fix __initdata = {
42 .id = "VESA VGA",
43 .type = FB_TYPE_PACKED_PIXELS,
44 .accel = FB_ACCEL_NONE,
45};
46
47static int inverse = 0;
48static int mtrr = 1;
49static int vram_remap __initdata = 0; /* Set amount of memory to be used */
50static int vram_total __initdata = 0; /* Set total amount of memory */
51static int pmi_setpal = 0; /* pmi for palette changes ??? */
52static int ypan = 0; /* 0..nothing, 1..ypan, 2..ywrap */
53static unsigned short *pmi_base = NULL;
54static void (*pmi_start)(void);
55static void (*pmi_pal)(void);
56static int depth;
57
58/* --------------------------------------------------------------------- */
59
60static 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
89static 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
120static 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
175static 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
185static 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
219static 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
Gerd Knorr78c03712005-06-21 17:16:56 -0700274 "vesafb: cannot reserve video memory at 0x%lx\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275 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) {
Gerd Knorr78c03712005-06-21 17:16:56 -0700282 release_mem_region(vesafb_fix.smem_start, size_total);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283 return -ENOMEM;
284 }
285 info->pseudo_palette = info->par;
286 info->par = NULL;
287
Gerd Knorr78c03712005-06-21 17:16:56 -0700288 info->screen_base = ioremap(vesafb_fix.smem_start, vesafb_fix.smem_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 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) {
Gerd Knorr78c03712005-06-21 17:16:56 -0700389 unsigned int temp_size = size_total;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390 /* 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 && mtrr_add(vesafb_fix.smem_start, temp_size, MTRR_TYPE_WRCOMB, 1)==-EINVAL) {
396 temp_size >>= 1;
397 }
398 }
399
400 info->fbops = &vesafb_ops;
401 info->var = vesafb_defined;
402 info->fix = vesafb_fix;
403 info->flags = FBINFO_FLAG_DEFAULT |
404 (ypan) ? FBINFO_HWACCEL_YPAN : 0;
405
406 if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
407 err = -ENOMEM;
408 goto err;
409 }
410 if (register_framebuffer(info)<0) {
411 err = -EINVAL;
412 fb_dealloc_cmap(&info->cmap);
413 goto err;
414 }
415 printk(KERN_INFO "fb%d: %s frame buffer device\n",
416 info->node, info->fix.id);
417 return 0;
418err:
419 framebuffer_release(info);
420 release_mem_region(vesafb_fix.smem_start, size_total);
421 return err;
422}
423
424static struct device_driver vesafb_driver = {
425 .name = "vesafb",
426 .bus = &platform_bus_type,
427 .probe = vesafb_probe,
428};
429
430static struct platform_device vesafb_device = {
431 .name = "vesafb",
432};
433
434static int __init vesafb_init(void)
435{
436 int ret;
437 char *option = NULL;
438
439 /* ignore error return of fb_get_options */
440 fb_get_options("vesafb", &option);
441 vesafb_setup(option);
442 ret = driver_register(&vesafb_driver);
443
444 if (!ret) {
445 ret = platform_device_register(&vesafb_device);
446 if (ret)
447 driver_unregister(&vesafb_driver);
448 }
449 return ret;
450}
451module_init(vesafb_init);
452
453MODULE_LICENSE("GPL");