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Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6
[linux-2.6.git] / drivers / video / vesafb.c
blob8982e540214c56b2de7d0299ce8c15258d76fc83
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 <linux/platform_device.h>
23
24 #include <video/vga.h>
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;
51 static int mtrr = 0; /* disable mtrr */
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 */
54 static int pmi_setpal = 0; /* pmi for palette changes ??? */
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;
60
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
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
83 static void vesa_setpalette(int regno, unsigned red, unsigned green,
84 unsigned blue)
85 {
86 #ifdef __i386__
87 struct { u_char blue, green, red, pad; } entry;
88 int shift = 16 - depth;
89
90 if (pmi_setpal) {
91 entry.red = red >> shift;
92 entry.green = green >> shift;
93 entry.blue = blue >> shift;
94 entry.pad = 0;
95 __asm__ __volatile__(
96 "call *(%%esi)"
97 : /* no return value */
98 : "a" (0x4f09), /* EAX */
99 "b" (0), /* EBX */
100 "c" (1), /* ECX */
101 "d" (regno), /* EDX */
102 "D" (&entry), /* EDI */
103 "S" (&pmi_pal)); /* ESI */
104 } else {
105 /* without protected mode interface, try VGA registers... */
106 outb_p(regno, dac_reg);
107 outb_p(red >> shift, dac_val);
108 outb_p(green >> shift, dac_val);
109 outb_p(blue >> shift, dac_val);
110 }
111 #endif
112 }
113
114 static int vesafb_setcolreg(unsigned regno, unsigned red, unsigned green,
115 unsigned blue, unsigned transp,
116 struct fb_info *info)
117 {
118 /*
119 * Set a single color register. The values supplied are
120 * already rounded down to the hardware's capabilities
121 * (according to the entries in the `var' structure). Return
122 * != 0 for invalid regno.
123 */
124
125 if (regno >= info->cmap.len)
126 return 1;
127
128 if (info->var.bits_per_pixel == 8)
129 vesa_setpalette(regno,red,green,blue);
130 else if (regno < 16) {
131 switch (info->var.bits_per_pixel) {
132 case 16:
133 if (info->var.red.offset == 10) {
134 /* 1:5:5:5 */
135 ((u32*) (info->pseudo_palette))[regno] =
136 ((red & 0xf800) >> 1) |
137 ((green & 0xf800) >> 6) |
138 ((blue & 0xf800) >> 11);
139 } else {
140 /* 0:5:6:5 */
141 ((u32*) (info->pseudo_palette))[regno] =
142 ((red & 0xf800) ) |
143 ((green & 0xfc00) >> 5) |
144 ((blue & 0xf800) >> 11);
145 }
146 break;
147 case 24:
148 case 32:
149 red >>= 8;
150 green >>= 8;
151 blue >>= 8;
152 ((u32 *)(info->pseudo_palette))[regno] =
153 (red << info->var.red.offset) |
154 (green << info->var.green.offset) |
155 (blue << info->var.blue.offset);
156 break;
157 }
158 }
159
160 return 0;
161 }
162
163 static struct fb_ops vesafb_ops = {
164 .owner = THIS_MODULE,
165 .fb_setcolreg = vesafb_setcolreg,
166 .fb_pan_display = vesafb_pan_display,
167 .fb_fillrect = cfb_fillrect,
168 .fb_copyarea = cfb_copyarea,
169 .fb_imageblit = cfb_imageblit,
170 };
171
172 static int __init vesafb_setup(char *options)
173 {
174 char *this_opt;
175
176 if (!options || !*options)
177 return 0;
178
179 while ((this_opt = strsep(&options, ",")) != NULL) {
180 if (!*this_opt) continue;
181
182 if (! strcmp(this_opt, "inverse"))
183 inverse=1;
184 else if (! strcmp(this_opt, "redraw"))
185 ypan=0;
186 else if (! strcmp(this_opt, "ypan"))
187 ypan=1;
188 else if (! strcmp(this_opt, "ywrap"))
189 ypan=2;
190 else if (! strcmp(this_opt, "vgapal"))
191 pmi_setpal=0;
192 else if (! strcmp(this_opt, "pmipal"))
193 pmi_setpal=1;
194 else if (! strncmp(this_opt, "mtrr:", 5))
195 mtrr = simple_strtoul(this_opt+5, NULL, 0);
196 else if (! strcmp(this_opt, "nomtrr"))
197 mtrr=0;
198 else if (! strncmp(this_opt, "vtotal:", 7))
199 vram_total = simple_strtoul(this_opt+7, NULL, 0);
200 else if (! strncmp(this_opt, "vremap:", 7))
201 vram_remap = simple_strtoul(this_opt+7, NULL, 0);
202 }
203 return 0;
204 }
205
206 static int __init vesafb_probe(struct platform_device *dev)
207 {
208 struct fb_info *info;
209 int i, err;
210 unsigned int size_vmode;
211 unsigned int size_remap;
212 unsigned int size_total;
213
214 if (screen_info.orig_video_isVGA != VIDEO_TYPE_VLFB)
215 return -ENODEV;
216
217 vesafb_fix.smem_start = screen_info.lfb_base;
218 vesafb_defined.bits_per_pixel = screen_info.lfb_depth;
219 if (15 == vesafb_defined.bits_per_pixel)
220 vesafb_defined.bits_per_pixel = 16;
221 vesafb_defined.xres = screen_info.lfb_width;
222 vesafb_defined.yres = screen_info.lfb_height;
223 vesafb_fix.line_length = screen_info.lfb_linelength;
224 vesafb_fix.visual = (vesafb_defined.bits_per_pixel == 8) ?
225 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
226
227 /* size_vmode -- that is the amount of memory needed for the
228 * used video mode, i.e. the minimum amount of
229 * memory we need. */
230 size_vmode = vesafb_defined.yres * vesafb_fix.line_length;
231
232 /* size_total -- all video memory we have. Used for mtrr
233 * entries, ressource allocation and bounds
234 * checking. */
235 size_total = screen_info.lfb_size * 65536;
236 if (vram_total)
237 size_total = vram_total * 1024 * 1024;
238 if (size_total < size_vmode)
239 size_total = size_vmode;
240
241 /* size_remap -- the amount of video memory we are going to
242 * use for vesafb. With modern cards it is no
243 * option to simply use size_total as that
244 * wastes plenty of kernel address space. */
245 size_remap = size_vmode * 2;
246 if (vram_remap)
247 size_remap = vram_remap * 1024 * 1024;
248 if (size_remap < size_vmode)
249 size_remap = size_vmode;
250 if (size_remap > size_total)
251 size_remap = size_total;
252 vesafb_fix.smem_len = size_remap;
253
254 #ifndef __i386__
255 screen_info.vesapm_seg = 0;
256 #endif
257
258 if (!request_mem_region(vesafb_fix.smem_start, size_total, "vesafb")) {
259 printk(KERN_WARNING
260 "vesafb: cannot reserve video memory at 0x%lx\n",
261 vesafb_fix.smem_start);
262 /* We cannot make this fatal. Sometimes this comes from magic
263 spaces our resource handlers simply don't know about */
264 }
265
266 info = framebuffer_alloc(sizeof(u32) * 256, &dev->dev);
267 if (!info) {
268 release_mem_region(vesafb_fix.smem_start, size_total);
269 return -ENOMEM;
270 }
271 info->pseudo_palette = info->par;
272 info->par = NULL;
273
274 info->screen_base = ioremap(vesafb_fix.smem_start, vesafb_fix.smem_len);
275 if (!info->screen_base) {
276 printk(KERN_ERR
277 "vesafb: abort, cannot ioremap video memory 0x%x @ 0x%lx\n",
278 vesafb_fix.smem_len, vesafb_fix.smem_start);
279 err = -EIO;
280 goto err;
281 }
282
283 printk(KERN_INFO "vesafb: framebuffer at 0x%lx, mapped to 0x%p, "
284 "using %dk, total %dk\n",
285 vesafb_fix.smem_start, info->screen_base,
286 size_remap/1024, size_total/1024);
287 printk(KERN_INFO "vesafb: mode is %dx%dx%d, linelength=%d, pages=%d\n",
288 vesafb_defined.xres, vesafb_defined.yres, vesafb_defined.bits_per_pixel, vesafb_fix.line_length, screen_info.pages);
289
290 if (screen_info.vesapm_seg) {
291 printk(KERN_INFO "vesafb: protected mode interface info at %04x:%04x\n",
292 screen_info.vesapm_seg,screen_info.vesapm_off);
293 }
294
295 if (screen_info.vesapm_seg < 0xc000)
296 ypan = pmi_setpal = 0; /* not available or some DOS TSR ... */
297
298 if (ypan || pmi_setpal) {
299 pmi_base = (unsigned short*)phys_to_virt(((unsigned long)screen_info.vesapm_seg << 4) + screen_info.vesapm_off);
300 pmi_start = (void*)((char*)pmi_base + pmi_base[1]);
301 pmi_pal = (void*)((char*)pmi_base + pmi_base[2]);
302 printk(KERN_INFO "vesafb: pmi: set display start = %p, set palette = %p\n",pmi_start,pmi_pal);
303 if (pmi_base[3]) {
304 printk(KERN_INFO "vesafb: pmi: ports = ");
305 for (i = pmi_base[3]/2; pmi_base[i] != 0xffff; i++)
306 printk("%x ",pmi_base[i]);
307 printk("\n");
308 if (pmi_base[i] != 0xffff) {
309 /*
310 * memory areas not supported (yet?)
311 *
312 * Rules are: we have to set up a descriptor for the requested
313 * memory area and pass it in the ES register to the BIOS function.
314 */
315 printk(KERN_INFO "vesafb: can't handle memory requests, pmi disabled\n");
316 ypan = pmi_setpal = 0;
317 }
318 }
319 }
320
321 vesafb_defined.xres_virtual = vesafb_defined.xres;
322 vesafb_defined.yres_virtual = vesafb_fix.smem_len / vesafb_fix.line_length;
323 if (ypan && vesafb_defined.yres_virtual > vesafb_defined.yres) {
324 printk(KERN_INFO "vesafb: scrolling: %s using protected mode interface, yres_virtual=%d\n",
325 (ypan > 1) ? "ywrap" : "ypan",vesafb_defined.yres_virtual);
326 } else {
327 printk(KERN_INFO "vesafb: scrolling: redraw\n");
328 vesafb_defined.yres_virtual = vesafb_defined.yres;
329 ypan = 0;
330 }
331
332 /* some dummy values for timing to make fbset happy */
333 vesafb_defined.pixclock = 10000000 / vesafb_defined.xres * 1000 / vesafb_defined.yres;
334 vesafb_defined.left_margin = (vesafb_defined.xres / 8) & 0xf8;
335 vesafb_defined.hsync_len = (vesafb_defined.xres / 8) & 0xf8;
336
337 vesafb_defined.red.offset = screen_info.red_pos;
338 vesafb_defined.red.length = screen_info.red_size;
339 vesafb_defined.green.offset = screen_info.green_pos;
340 vesafb_defined.green.length = screen_info.green_size;
341 vesafb_defined.blue.offset = screen_info.blue_pos;
342 vesafb_defined.blue.length = screen_info.blue_size;
343 vesafb_defined.transp.offset = screen_info.rsvd_pos;
344 vesafb_defined.transp.length = screen_info.rsvd_size;
345
346 if (vesafb_defined.bits_per_pixel <= 8) {
347 depth = vesafb_defined.green.length;
348 vesafb_defined.red.length =
349 vesafb_defined.green.length =
350 vesafb_defined.blue.length =
351 vesafb_defined.bits_per_pixel;
352 }
353
354 printk(KERN_INFO "vesafb: %s: "
355 "size=%d:%d:%d:%d, shift=%d:%d:%d:%d\n",
356 (vesafb_defined.bits_per_pixel > 8) ?
357 "Truecolor" : "Pseudocolor",
358 screen_info.rsvd_size,
359 screen_info.red_size,
360 screen_info.green_size,
361 screen_info.blue_size,
362 screen_info.rsvd_pos,
363 screen_info.red_pos,
364 screen_info.green_pos,
365 screen_info.blue_pos);
366
367 vesafb_fix.ypanstep = ypan ? 1 : 0;
368 vesafb_fix.ywrapstep = (ypan>1) ? 1 : 0;
369
370 /* request failure does not faze us, as vgacon probably has this
371 * region already (FIXME) */
372 request_region(0x3c0, 32, "vesafb");
373
374 #ifdef CONFIG_MTRR
375 if (mtrr) {
376 unsigned int temp_size = size_total;
377 unsigned int type = 0;
378
379 switch (mtrr) {
380 case 1:
381 type = MTRR_TYPE_UNCACHABLE;
382 break;
383 case 2:
384 type = MTRR_TYPE_WRBACK;
385 break;
386 case 3:
387 type = MTRR_TYPE_WRCOMB;
388 break;
389 case 4:
390 type = MTRR_TYPE_WRTHROUGH;
391 break;
392 default:
393 type = 0;
394 break;
395 }
396
397 if (type) {
398 int rc;
399
400 /* Find the largest power-of-two */
401 while (temp_size & (temp_size - 1))
402 temp_size &= (temp_size - 1);
403
404 /* Try and find a power of two to add */
405 do {
406 rc = mtrr_add(vesafb_fix.smem_start, temp_size,
407 type, 1);
408 temp_size >>= 1;
409 } while (temp_size >= PAGE_SIZE && rc == -EINVAL);
410 }
411 }
412 #endif
413
414 info->fbops = &vesafb_ops;
415 info->var = vesafb_defined;
416 info->fix = vesafb_fix;
417 info->flags = FBINFO_FLAG_DEFAULT |
418 (ypan) ? FBINFO_HWACCEL_YPAN : 0;
419
420 if (!ypan)
421 info->fbops->fb_pan_display = NULL;
422
423 if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
424 err = -ENOMEM;
425 goto err;
426 }
427 if (register_framebuffer(info)<0) {
428 err = -EINVAL;
429 fb_dealloc_cmap(&info->cmap);
430 goto err;
431 }
432 printk(KERN_INFO "fb%d: %s frame buffer device\n",
433 info->node, info->fix.id);
434 return 0;
435 err:
436 framebuffer_release(info);
437 release_mem_region(vesafb_fix.smem_start, size_total);
438 return err;
439 }
440
441 static struct platform_driver vesafb_driver = {
442 .probe = vesafb_probe,
443 .driver = {
444 .name = "vesafb",
445 },
446 };
447
448 static struct platform_device vesafb_device = {
449 .name = "vesafb",
450 };
451
452 static int __init vesafb_init(void)
453 {
454 int ret;
455 char *option = NULL;
456
457 /* ignore error return of fb_get_options */
458 fb_get_options("vesafb", &option);
459 vesafb_setup(option);
460 ret = platform_driver_register(&vesafb_driver);
461
462 if (!ret) {
463 ret = platform_device_register(&vesafb_device);
464 if (ret)
465 platform_driver_unregister(&vesafb_driver);
466 }
467 return ret;
468 }
469 module_init(vesafb_init);
470
471 MODULE_LICENSE("GPL");
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