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Linux 2.6.34-rc3
[pohmelfs.git] / drivers / video / uvesafb.c
blob54fbb2995a5f3007d2ed5fbceea54738e9314904
1 /*
2 * A framebuffer driver for VBE 2.0+ compliant video cards
3 *
4 * (c) 2007 Michal Januszewski <spock@gentoo.org>
5 * Loosely based upon the vesafb driver.
6 *
7 */
8 #include <linux/init.h>
9 #include <linux/module.h>
10 #include <linux/moduleparam.h>
11 #include <linux/skbuff.h>
12 #include <linux/timer.h>
13 #include <linux/completion.h>
14 #include <linux/connector.h>
15 #include <linux/random.h>
16 #include <linux/platform_device.h>
17 #include <linux/limits.h>
18 #include <linux/fb.h>
19 #include <linux/io.h>
20 #include <linux/mutex.h>
21 #include <video/edid.h>
22 #include <video/uvesafb.h>
23 #ifdef CONFIG_X86
24 #include <video/vga.h>
25 #endif
26 #ifdef CONFIG_MTRR
27 #include <asm/mtrr.h>
28 #endif
29 #include "edid.h"
30
31 static struct cb_id uvesafb_cn_id = {
32 .idx = CN_IDX_V86D,
33 .val = CN_VAL_V86D_UVESAFB
34 };
35 static char v86d_path[PATH_MAX] = "/sbin/v86d";
36 static char v86d_started; /* has v86d been started by uvesafb? */
37
38 static struct fb_fix_screeninfo uvesafb_fix __devinitdata = {
39 .id = "VESA VGA",
40 .type = FB_TYPE_PACKED_PIXELS,
41 .accel = FB_ACCEL_NONE,
42 .visual = FB_VISUAL_TRUECOLOR,
43 };
44
45 static int mtrr __devinitdata = 3; /* enable mtrr by default */
46 static int blank = 1; /* enable blanking by default */
47 static int ypan = 1; /* 0: scroll, 1: ypan, 2: ywrap */
48 static bool pmi_setpal __devinitdata = true; /* use PMI for palette changes */
49 static int nocrtc __devinitdata; /* ignore CRTC settings */
50 static int noedid __devinitdata; /* don't try DDC transfers */
51 static int vram_remap __devinitdata; /* set amt. of memory to be used */
52 static int vram_total __devinitdata; /* set total amount of memory */
53 static u16 maxclk __devinitdata; /* maximum pixel clock */
54 static u16 maxvf __devinitdata; /* maximum vertical frequency */
55 static u16 maxhf __devinitdata; /* maximum horizontal frequency */
56 static u16 vbemode __devinitdata; /* force use of a specific VBE mode */
57 static char *mode_option __devinitdata;
58 static u8 dac_width = 6;
59
60 static struct uvesafb_ktask *uvfb_tasks[UVESAFB_TASKS_MAX];
61 static DEFINE_MUTEX(uvfb_lock);
62
63 /*
64 * A handler for replies from userspace.
65 *
66 * Make sure each message passes consistency checks and if it does,
67 * find the kernel part of the task struct, copy the registers and
68 * the buffer contents and then complete the task.
69 */
70 static void uvesafb_cn_callback(struct cn_msg *msg, struct netlink_skb_parms *nsp)
71 {
72 struct uvesafb_task *utask;
73 struct uvesafb_ktask *task;
74
75 if (!cap_raised(nsp->eff_cap, CAP_SYS_ADMIN))
76 return;
77
78 if (msg->seq >= UVESAFB_TASKS_MAX)
79 return;
80
81 mutex_lock(&uvfb_lock);
82 task = uvfb_tasks[msg->seq];
83
84 if (!task || msg->ack != task->ack) {
85 mutex_unlock(&uvfb_lock);
86 return;
87 }
88
89 utask = (struct uvesafb_task *)msg->data;
90
91 /* Sanity checks for the buffer length. */
92 if (task->t.buf_len < utask->buf_len ||
93 utask->buf_len > msg->len - sizeof(*utask)) {
94 mutex_unlock(&uvfb_lock);
95 return;
96 }
97
98 uvfb_tasks[msg->seq] = NULL;
99 mutex_unlock(&uvfb_lock);
100
101 memcpy(&task->t, utask, sizeof(*utask));
102
103 if (task->t.buf_len && task->buf)
104 memcpy(task->buf, utask + 1, task->t.buf_len);
105
106 complete(task->done);
107 return;
108 }
109
110 static int uvesafb_helper_start(void)
111 {
112 char *envp[] = {
113 "HOME=/",
114 "PATH=/sbin:/bin",
115 NULL,
116 };
117
118 char *argv[] = {
119 v86d_path,
120 NULL,
121 };
122
123 return call_usermodehelper(v86d_path, argv, envp, 1);
124 }
125
126 /*
127 * Execute a uvesafb task.
128 *
129 * Returns 0 if the task is executed successfully.
130 *
131 * A message sent to the userspace consists of the uvesafb_task
132 * struct and (optionally) a buffer. The uvesafb_task struct is
133 * a simplified version of uvesafb_ktask (its kernel counterpart)
134 * containing only the register values, flags and the length of
135 * the buffer.
136 *
137 * Each message is assigned a sequence number (increased linearly)
138 * and a random ack number. The sequence number is used as a key
139 * for the uvfb_tasks array which holds pointers to uvesafb_ktask
140 * structs for all requests.
141 */
142 static int uvesafb_exec(struct uvesafb_ktask *task)
143 {
144 static int seq;
145 struct cn_msg *m;
146 int err;
147 int len = sizeof(task->t) + task->t.buf_len;
148
149 /*
150 * Check whether the message isn't longer than the maximum
151 * allowed by connector.
152 */
153 if (sizeof(*m) + len > CONNECTOR_MAX_MSG_SIZE) {
154 printk(KERN_WARNING "uvesafb: message too long (%d), "
155 "can't execute task\n", (int)(sizeof(*m) + len));
156 return -E2BIG;
157 }
158
159 m = kzalloc(sizeof(*m) + len, GFP_KERNEL);
160 if (!m)
161 return -ENOMEM;
162
163 init_completion(task->done);
164
165 memcpy(&m->id, &uvesafb_cn_id, sizeof(m->id));
166 m->seq = seq;
167 m->len = len;
168 m->ack = random32();
169
170 /* uvesafb_task structure */
171 memcpy(m + 1, &task->t, sizeof(task->t));
172
173 /* Buffer */
174 memcpy((u8 *)(m + 1) + sizeof(task->t), task->buf, task->t.buf_len);
175
176 /*
177 * Save the message ack number so that we can find the kernel
178 * part of this task when a reply is received from userspace.
179 */
180 task->ack = m->ack;
181
182 mutex_lock(&uvfb_lock);
183
184 /* If all slots are taken -- bail out. */
185 if (uvfb_tasks[seq]) {
186 mutex_unlock(&uvfb_lock);
187 err = -EBUSY;
188 goto out;
189 }
190
191 /* Save a pointer to the kernel part of the task struct. */
192 uvfb_tasks[seq] = task;
193 mutex_unlock(&uvfb_lock);
194
195 err = cn_netlink_send(m, 0, GFP_KERNEL);
196 if (err == -ESRCH) {
197 /*
198 * Try to start the userspace helper if sending
199 * the request failed the first time.
200 */
201 err = uvesafb_helper_start();
202 if (err) {
203 printk(KERN_ERR "uvesafb: failed to execute %s\n",
204 v86d_path);
205 printk(KERN_ERR "uvesafb: make sure that the v86d "
206 "helper is installed and executable\n");
207 } else {
208 v86d_started = 1;
209 err = cn_netlink_send(m, 0, gfp_any());
210 if (err == -ENOBUFS)
211 err = 0;
212 }
213 } else if (err == -ENOBUFS)
214 err = 0;
215
216 if (!err && !(task->t.flags & TF_EXIT))
217 err = !wait_for_completion_timeout(task->done,
218 msecs_to_jiffies(UVESAFB_TIMEOUT));
219
220 mutex_lock(&uvfb_lock);
221 uvfb_tasks[seq] = NULL;
222 mutex_unlock(&uvfb_lock);
223
224 seq++;
225 if (seq >= UVESAFB_TASKS_MAX)
226 seq = 0;
227 out:
228 kfree(m);
229 return err;
230 }
231
232 /*
233 * Free a uvesafb_ktask struct.
234 */
235 static void uvesafb_free(struct uvesafb_ktask *task)
236 {
237 if (task) {
238 if (task->done)
239 kfree(task->done);
240 kfree(task);
241 }
242 }
243
244 /*
245 * Prepare a uvesafb_ktask struct to be used again.
246 */
247 static void uvesafb_reset(struct uvesafb_ktask *task)
248 {
249 struct completion *cpl = task->done;
250
251 memset(task, 0, sizeof(*task));
252 task->done = cpl;
253 }
254
255 /*
256 * Allocate and prepare a uvesafb_ktask struct.
257 */
258 static struct uvesafb_ktask *uvesafb_prep(void)
259 {
260 struct uvesafb_ktask *task;
261
262 task = kzalloc(sizeof(*task), GFP_KERNEL);
263 if (task) {
264 task->done = kzalloc(sizeof(*task->done), GFP_KERNEL);
265 if (!task->done) {
266 kfree(task);
267 task = NULL;
268 }
269 }
270 return task;
271 }
272
273 static void uvesafb_setup_var(struct fb_var_screeninfo *var,
274 struct fb_info *info, struct vbe_mode_ib *mode)
275 {
276 struct uvesafb_par *par = info->par;
277
278 var->vmode = FB_VMODE_NONINTERLACED;
279 var->sync = FB_SYNC_VERT_HIGH_ACT;
280
281 var->xres = mode->x_res;
282 var->yres = mode->y_res;
283 var->xres_virtual = mode->x_res;
284 var->yres_virtual = (par->ypan) ?
285 info->fix.smem_len / mode->bytes_per_scan_line :
286 mode->y_res;
287 var->xoffset = 0;
288 var->yoffset = 0;
289 var->bits_per_pixel = mode->bits_per_pixel;
290
291 if (var->bits_per_pixel == 15)
292 var->bits_per_pixel = 16;
293
294 if (var->bits_per_pixel > 8) {
295 var->red.offset = mode->red_off;
296 var->red.length = mode->red_len;
297 var->green.offset = mode->green_off;
298 var->green.length = mode->green_len;
299 var->blue.offset = mode->blue_off;
300 var->blue.length = mode->blue_len;
301 var->transp.offset = mode->rsvd_off;
302 var->transp.length = mode->rsvd_len;
303 } else {
304 var->red.offset = 0;
305 var->green.offset = 0;
306 var->blue.offset = 0;
307 var->transp.offset = 0;
308
309 var->red.length = 8;
310 var->green.length = 8;
311 var->blue.length = 8;
312 var->transp.length = 0;
313 }
314 }
315
316 static int uvesafb_vbe_find_mode(struct uvesafb_par *par,
317 int xres, int yres, int depth, unsigned char flags)
318 {
319 int i, match = -1, h = 0, d = 0x7fffffff;
320
321 for (i = 0; i < par->vbe_modes_cnt; i++) {
322 h = abs(par->vbe_modes[i].x_res - xres) +
323 abs(par->vbe_modes[i].y_res - yres) +
324 abs(depth - par->vbe_modes[i].depth);
325
326 /*
327 * We have an exact match in terms of resolution
328 * and depth.
329 */
330 if (h == 0)
331 return i;
332
333 if (h < d || (h == d && par->vbe_modes[i].depth > depth)) {
334 d = h;
335 match = i;
336 }
337 }
338 i = 1;
339
340 if (flags & UVESAFB_EXACT_DEPTH &&
341 par->vbe_modes[match].depth != depth)
342 i = 0;
343
344 if (flags & UVESAFB_EXACT_RES && d > 24)
345 i = 0;
346
347 if (i != 0)
348 return match;
349 else
350 return -1;
351 }
352
353 static u8 *uvesafb_vbe_state_save(struct uvesafb_par *par)
354 {
355 struct uvesafb_ktask *task;
356 u8 *state;
357 int err;
358
359 if (!par->vbe_state_size)
360 return NULL;
361
362 state = kmalloc(par->vbe_state_size, GFP_KERNEL);
363 if (!state)
364 return NULL;
365
366 task = uvesafb_prep();
367 if (!task) {
368 kfree(state);
369 return NULL;
370 }
371
372 task->t.regs.eax = 0x4f04;
373 task->t.regs.ecx = 0x000f;
374 task->t.regs.edx = 0x0001;
375 task->t.flags = TF_BUF_RET | TF_BUF_ESBX;
376 task->t.buf_len = par->vbe_state_size;
377 task->buf = state;
378 err = uvesafb_exec(task);
379
380 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
381 printk(KERN_WARNING "uvesafb: VBE get state call "
382 "failed (eax=0x%x, err=%d)\n",
383 task->t.regs.eax, err);
384 kfree(state);
385 state = NULL;
386 }
387
388 uvesafb_free(task);
389 return state;
390 }
391
392 static void uvesafb_vbe_state_restore(struct uvesafb_par *par, u8 *state_buf)
393 {
394 struct uvesafb_ktask *task;
395 int err;
396
397 if (!state_buf)
398 return;
399
400 task = uvesafb_prep();
401 if (!task)
402 return;
403
404 task->t.regs.eax = 0x4f04;
405 task->t.regs.ecx = 0x000f;
406 task->t.regs.edx = 0x0002;
407 task->t.buf_len = par->vbe_state_size;
408 task->t.flags = TF_BUF_ESBX;
409 task->buf = state_buf;
410
411 err = uvesafb_exec(task);
412 if (err || (task->t.regs.eax & 0xffff) != 0x004f)
413 printk(KERN_WARNING "uvesafb: VBE state restore call "
414 "failed (eax=0x%x, err=%d)\n",
415 task->t.regs.eax, err);
416
417 uvesafb_free(task);
418 }
419
420 static int __devinit uvesafb_vbe_getinfo(struct uvesafb_ktask *task,
421 struct uvesafb_par *par)
422 {
423 int err;
424
425 task->t.regs.eax = 0x4f00;
426 task->t.flags = TF_VBEIB;
427 task->t.buf_len = sizeof(struct vbe_ib);
428 task->buf = &par->vbe_ib;
429 strncpy(par->vbe_ib.vbe_signature, "VBE2", 4);
430
431 err = uvesafb_exec(task);
432 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
433 printk(KERN_ERR "uvesafb: Getting VBE info block failed "
434 "(eax=0x%x, err=%d)\n", (u32)task->t.regs.eax,
435 err);
436 return -EINVAL;
437 }
438
439 if (par->vbe_ib.vbe_version < 0x0200) {
440 printk(KERN_ERR "uvesafb: Sorry, pre-VBE 2.0 cards are "
441 "not supported.\n");
442 return -EINVAL;
443 }
444
445 if (!par->vbe_ib.mode_list_ptr) {
446 printk(KERN_ERR "uvesafb: Missing mode list!\n");
447 return -EINVAL;
448 }
449
450 printk(KERN_INFO "uvesafb: ");
451
452 /*
453 * Convert string pointers and the mode list pointer into
454 * usable addresses. Print informational messages about the
455 * video adapter and its vendor.
456 */
457 if (par->vbe_ib.oem_vendor_name_ptr)
458 printk("%s, ",
459 ((char *)task->buf) + par->vbe_ib.oem_vendor_name_ptr);
460
461 if (par->vbe_ib.oem_product_name_ptr)
462 printk("%s, ",
463 ((char *)task->buf) + par->vbe_ib.oem_product_name_ptr);
464
465 if (par->vbe_ib.oem_product_rev_ptr)
466 printk("%s, ",
467 ((char *)task->buf) + par->vbe_ib.oem_product_rev_ptr);
468
469 if (par->vbe_ib.oem_string_ptr)
470 printk("OEM: %s, ",
471 ((char *)task->buf) + par->vbe_ib.oem_string_ptr);
472
473 printk("VBE v%d.%d\n", ((par->vbe_ib.vbe_version & 0xff00) >> 8),
474 par->vbe_ib.vbe_version & 0xff);
475
476 return 0;
477 }
478
479 static int __devinit uvesafb_vbe_getmodes(struct uvesafb_ktask *task,
480 struct uvesafb_par *par)
481 {
482 int off = 0, err;
483 u16 *mode;
484
485 par->vbe_modes_cnt = 0;
486
487 /* Count available modes. */
488 mode = (u16 *) (((u8 *)&par->vbe_ib) + par->vbe_ib.mode_list_ptr);
489 while (*mode != 0xffff) {
490 par->vbe_modes_cnt++;
491 mode++;
492 }
493
494 par->vbe_modes = kzalloc(sizeof(struct vbe_mode_ib) *
495 par->vbe_modes_cnt, GFP_KERNEL);
496 if (!par->vbe_modes)
497 return -ENOMEM;
498
499 /* Get info about all available modes. */
500 mode = (u16 *) (((u8 *)&par->vbe_ib) + par->vbe_ib.mode_list_ptr);
501 while (*mode != 0xffff) {
502 struct vbe_mode_ib *mib;
503
504 uvesafb_reset(task);
505 task->t.regs.eax = 0x4f01;
506 task->t.regs.ecx = (u32) *mode;
507 task->t.flags = TF_BUF_RET | TF_BUF_ESDI;
508 task->t.buf_len = sizeof(struct vbe_mode_ib);
509 task->buf = par->vbe_modes + off;
510
511 err = uvesafb_exec(task);
512 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
513 printk(KERN_WARNING "uvesafb: Getting mode info block "
514 "for mode 0x%x failed (eax=0x%x, err=%d)\n",
515 *mode, (u32)task->t.regs.eax, err);
516 mode++;
517 par->vbe_modes_cnt--;
518 continue;
519 }
520
521 mib = task->buf;
522 mib->mode_id = *mode;
523
524 /*
525 * We only want modes that are supported with the current
526 * hardware configuration, color, graphics and that have
527 * support for the LFB.
528 */
529 if ((mib->mode_attr & VBE_MODE_MASK) == VBE_MODE_MASK &&
530 mib->bits_per_pixel >= 8)
531 off++;
532 else
533 par->vbe_modes_cnt--;
534
535 mode++;
536 mib->depth = mib->red_len + mib->green_len + mib->blue_len;
537
538 /*
539 * Handle 8bpp modes and modes with broken color component
540 * lengths.
541 */
542 if (mib->depth == 0 || (mib->depth == 24 &&
543 mib->bits_per_pixel == 32))
544 mib->depth = mib->bits_per_pixel;
545 }
546
547 if (par->vbe_modes_cnt > 0)
548 return 0;
549 else
550 return -EINVAL;
551 }
552
553 /*
554 * The Protected Mode Interface is 32-bit x86 code, so we only run it on
555 * x86 and not x86_64.
556 */
557 #ifdef CONFIG_X86_32
558 static int __devinit uvesafb_vbe_getpmi(struct uvesafb_ktask *task,
559 struct uvesafb_par *par)
560 {
561 int i, err;
562
563 uvesafb_reset(task);
564 task->t.regs.eax = 0x4f0a;
565 task->t.regs.ebx = 0x0;
566 err = uvesafb_exec(task);
567
568 if ((task->t.regs.eax & 0xffff) != 0x4f || task->t.regs.es < 0xc000) {
569 par->pmi_setpal = par->ypan = 0;
570 } else {
571 par->pmi_base = (u16 *)phys_to_virt(((u32)task->t.regs.es << 4)
572 + task->t.regs.edi);
573 par->pmi_start = (u8 *)par->pmi_base + par->pmi_base[1];
574 par->pmi_pal = (u8 *)par->pmi_base + par->pmi_base[2];
575 printk(KERN_INFO "uvesafb: protected mode interface info at "
576 "%04x:%04x\n",
577 (u16)task->t.regs.es, (u16)task->t.regs.edi);
578 printk(KERN_INFO "uvesafb: pmi: set display start = %p, "
579 "set palette = %p\n", par->pmi_start,
580 par->pmi_pal);
581
582 if (par->pmi_base[3]) {
583 printk(KERN_INFO "uvesafb: pmi: ports = ");
584 for (i = par->pmi_base[3]/2;
585 par->pmi_base[i] != 0xffff; i++)
586 printk("%x ", par->pmi_base[i]);
587 printk("\n");
588
589 if (par->pmi_base[i] != 0xffff) {
590 printk(KERN_INFO "uvesafb: can't handle memory"
591 " requests, pmi disabled\n");
592 par->ypan = par->pmi_setpal = 0;
593 }
594 }
595 }
596 return 0;
597 }
598 #endif /* CONFIG_X86_32 */
599
600 /*
601 * Check whether a video mode is supported by the Video BIOS and is
602 * compatible with the monitor limits.
603 */
604 static int __devinit uvesafb_is_valid_mode(struct fb_videomode *mode,
605 struct fb_info *info)
606 {
607 if (info->monspecs.gtf) {
608 fb_videomode_to_var(&info->var, mode);
609 if (fb_validate_mode(&info->var, info))
610 return 0;
611 }
612
613 if (uvesafb_vbe_find_mode(info->par, mode->xres, mode->yres, 8,
614 UVESAFB_EXACT_RES) == -1)
615 return 0;
616
617 return 1;
618 }
619
620 static int __devinit uvesafb_vbe_getedid(struct uvesafb_ktask *task,
621 struct fb_info *info)
622 {
623 struct uvesafb_par *par = info->par;
624 int err = 0;
625
626 if (noedid || par->vbe_ib.vbe_version < 0x0300)
627 return -EINVAL;
628
629 task->t.regs.eax = 0x4f15;
630 task->t.regs.ebx = 0;
631 task->t.regs.ecx = 0;
632 task->t.buf_len = 0;
633 task->t.flags = 0;
634
635 err = uvesafb_exec(task);
636
637 if ((task->t.regs.eax & 0xffff) != 0x004f || err)
638 return -EINVAL;
639
640 if ((task->t.regs.ebx & 0x3) == 3) {
641 printk(KERN_INFO "uvesafb: VBIOS/hardware supports both "
642 "DDC1 and DDC2 transfers\n");
643 } else if ((task->t.regs.ebx & 0x3) == 2) {
644 printk(KERN_INFO "uvesafb: VBIOS/hardware supports DDC2 "
645 "transfers\n");
646 } else if ((task->t.regs.ebx & 0x3) == 1) {
647 printk(KERN_INFO "uvesafb: VBIOS/hardware supports DDC1 "
648 "transfers\n");
649 } else {
650 printk(KERN_INFO "uvesafb: VBIOS/hardware doesn't support "
651 "DDC transfers\n");
652 return -EINVAL;
653 }
654
655 task->t.regs.eax = 0x4f15;
656 task->t.regs.ebx = 1;
657 task->t.regs.ecx = task->t.regs.edx = 0;
658 task->t.flags = TF_BUF_RET | TF_BUF_ESDI;
659 task->t.buf_len = EDID_LENGTH;
660 task->buf = kzalloc(EDID_LENGTH, GFP_KERNEL);
661
662 err = uvesafb_exec(task);
663
664 if ((task->t.regs.eax & 0xffff) == 0x004f && !err) {
665 fb_edid_to_monspecs(task->buf, &info->monspecs);
666
667 if (info->monspecs.vfmax && info->monspecs.hfmax) {
668 /*
669 * If the maximum pixel clock wasn't specified in
670 * the EDID block, set it to 300 MHz.
671 */
672 if (info->monspecs.dclkmax == 0)
673 info->monspecs.dclkmax = 300 * 1000000;
674 info->monspecs.gtf = 1;
675 }
676 } else {
677 err = -EINVAL;
678 }
679
680 kfree(task->buf);
681 return err;
682 }
683
684 static void __devinit uvesafb_vbe_getmonspecs(struct uvesafb_ktask *task,
685 struct fb_info *info)
686 {
687 struct uvesafb_par *par = info->par;
688 int i;
689
690 memset(&info->monspecs, 0, sizeof(info->monspecs));
691
692 /*
693 * If we don't get all necessary data from the EDID block,
694 * mark it as incompatible with the GTF and set nocrtc so
695 * that we always use the default BIOS refresh rate.
696 */
697 if (uvesafb_vbe_getedid(task, info)) {
698 info->monspecs.gtf = 0;
699 par->nocrtc = 1;
700 }
701
702 /* Kernel command line overrides. */
703 if (maxclk)
704 info->monspecs.dclkmax = maxclk * 1000000;
705 if (maxvf)
706 info->monspecs.vfmax = maxvf;
707 if (maxhf)
708 info->monspecs.hfmax = maxhf * 1000;
709
710 /*
711 * In case DDC transfers are not supported, the user can provide
712 * monitor limits manually. Lower limits are set to "safe" values.
713 */
714 if (info->monspecs.gtf == 0 && maxclk && maxvf && maxhf) {
715 info->monspecs.dclkmin = 0;
716 info->monspecs.vfmin = 60;
717 info->monspecs.hfmin = 29000;
718 info->monspecs.gtf = 1;
719 par->nocrtc = 0;
720 }
721
722 if (info->monspecs.gtf)
723 printk(KERN_INFO
724 "uvesafb: monitor limits: vf = %d Hz, hf = %d kHz, "
725 "clk = %d MHz\n", info->monspecs.vfmax,
726 (int)(info->monspecs.hfmax / 1000),
727 (int)(info->monspecs.dclkmax / 1000000));
728 else
729 printk(KERN_INFO "uvesafb: no monitor limits have been set, "
730 "default refresh rate will be used\n");
731
732 /* Add VBE modes to the modelist. */
733 for (i = 0; i < par->vbe_modes_cnt; i++) {
734 struct fb_var_screeninfo var;
735 struct vbe_mode_ib *mode;
736 struct fb_videomode vmode;
737
738 mode = &par->vbe_modes[i];
739 memset(&var, 0, sizeof(var));
740
741 var.xres = mode->x_res;
742 var.yres = mode->y_res;
743
744 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, &var, info);
745 fb_var_to_videomode(&vmode, &var);
746 fb_add_videomode(&vmode, &info->modelist);
747 }
748
749 /* Add valid VESA modes to our modelist. */
750 for (i = 0; i < VESA_MODEDB_SIZE; i++) {
751 if (uvesafb_is_valid_mode((struct fb_videomode *)
752 &vesa_modes[i], info))
753 fb_add_videomode(&vesa_modes[i], &info->modelist);
754 }
755
756 for (i = 0; i < info->monspecs.modedb_len; i++) {
757 if (uvesafb_is_valid_mode(&info->monspecs.modedb[i], info))
758 fb_add_videomode(&info->monspecs.modedb[i],
759 &info->modelist);
760 }
761
762 return;
763 }
764
765 static void __devinit uvesafb_vbe_getstatesize(struct uvesafb_ktask *task,
766 struct uvesafb_par *par)
767 {
768 int err;
769
770 uvesafb_reset(task);
771
772 /*
773 * Get the VBE state buffer size. We want all available
774 * hardware state data (CL = 0x0f).
775 */
776 task->t.regs.eax = 0x4f04;
777 task->t.regs.ecx = 0x000f;
778 task->t.regs.edx = 0x0000;
779 task->t.flags = 0;
780
781 err = uvesafb_exec(task);
782
783 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
784 printk(KERN_WARNING "uvesafb: VBE state buffer size "
785 "cannot be determined (eax=0x%x, err=%d)\n",
786 task->t.regs.eax, err);
787 par->vbe_state_size = 0;
788 return;
789 }
790
791 par->vbe_state_size = 64 * (task->t.regs.ebx & 0xffff);
792 }
793
794 static int __devinit uvesafb_vbe_init(struct fb_info *info)
795 {
796 struct uvesafb_ktask *task = NULL;
797 struct uvesafb_par *par = info->par;
798 int err;
799
800 task = uvesafb_prep();
801 if (!task)
802 return -ENOMEM;
803
804 err = uvesafb_vbe_getinfo(task, par);
805 if (err)
806 goto out;
807
808 err = uvesafb_vbe_getmodes(task, par);
809 if (err)
810 goto out;
811
812 par->nocrtc = nocrtc;
813 #ifdef CONFIG_X86_32
814 par->pmi_setpal = pmi_setpal;
815 par->ypan = ypan;
816
817 if (par->pmi_setpal || par->ypan)
818 uvesafb_vbe_getpmi(task, par);
819 #else
820 /* The protected mode interface is not available on non-x86. */
821 par->pmi_setpal = par->ypan = 0;
822 #endif
823
824 INIT_LIST_HEAD(&info->modelist);
825 uvesafb_vbe_getmonspecs(task, info);
826 uvesafb_vbe_getstatesize(task, par);
827
828 out: uvesafb_free(task);
829 return err;
830 }
831
832 static int __devinit uvesafb_vbe_init_mode(struct fb_info *info)
833 {
834 struct list_head *pos;
835 struct fb_modelist *modelist;
836 struct fb_videomode *mode;
837 struct uvesafb_par *par = info->par;
838 int i, modeid;
839
840 /* Has the user requested a specific VESA mode? */
841 if (vbemode) {
842 for (i = 0; i < par->vbe_modes_cnt; i++) {
843 if (par->vbe_modes[i].mode_id == vbemode) {
844 modeid = i;
845 uvesafb_setup_var(&info->var, info,
846 &par->vbe_modes[modeid]);
847 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
848 &info->var, info);
849 /*
850 * With pixclock set to 0, the default BIOS
851 * timings will be used in set_par().
852 */
853 info->var.pixclock = 0;
854 goto gotmode;
855 }
856 }
857 printk(KERN_INFO "uvesafb: requested VBE mode 0x%x is "
858 "unavailable\n", vbemode);
859 vbemode = 0;
860 }
861
862 /* Count the modes in the modelist */
863 i = 0;
864 list_for_each(pos, &info->modelist)
865 i++;
866
867 /*
868 * Convert the modelist into a modedb so that we can use it with
869 * fb_find_mode().
870 */
871 mode = kzalloc(i * sizeof(*mode), GFP_KERNEL);
872 if (mode) {
873 i = 0;
874 list_for_each(pos, &info->modelist) {
875 modelist = list_entry(pos, struct fb_modelist, list);
876 mode[i] = modelist->mode;
877 i++;
878 }
879
880 if (!mode_option)
881 mode_option = UVESAFB_DEFAULT_MODE;
882
883 i = fb_find_mode(&info->var, info, mode_option, mode, i,
884 NULL, 8);
885
886 kfree(mode);
887 }
888
889 /* fb_find_mode() failed */
890 if (i == 0) {
891 info->var.xres = 640;
892 info->var.yres = 480;
893 mode = (struct fb_videomode *)
894 fb_find_best_mode(&info->var, &info->modelist);
895
896 if (mode) {
897 fb_videomode_to_var(&info->var, mode);
898 } else {
899 modeid = par->vbe_modes[0].mode_id;
900 uvesafb_setup_var(&info->var, info,
901 &par->vbe_modes[modeid]);
902 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
903 &info->var, info);
904
905 goto gotmode;
906 }
907 }
908
909 /* Look for a matching VBE mode. */
910 modeid = uvesafb_vbe_find_mode(par, info->var.xres, info->var.yres,
911 info->var.bits_per_pixel, UVESAFB_EXACT_RES);
912
913 if (modeid == -1)
914 return -EINVAL;
915
916 uvesafb_setup_var(&info->var, info, &par->vbe_modes[modeid]);
917
918 gotmode:
919 /*
920 * If we are not VBE3.0+ compliant, we're done -- the BIOS will
921 * ignore our timings anyway.
922 */
923 if (par->vbe_ib.vbe_version < 0x0300 || par->nocrtc)
924 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
925 &info->var, info);
926
927 return modeid;
928 }
929
930 static int uvesafb_setpalette(struct uvesafb_pal_entry *entries, int count,
931 int start, struct fb_info *info)
932 {
933 struct uvesafb_ktask *task;
934 #ifdef CONFIG_X86
935 struct uvesafb_par *par = info->par;
936 int i = par->mode_idx;
937 #endif
938 int err = 0;
939
940 /*
941 * We support palette modifications for 8 bpp modes only, so
942 * there can never be more than 256 entries.
943 */
944 if (start + count > 256)
945 return -EINVAL;
946
947 #ifdef CONFIG_X86
948 /* Use VGA registers if mode is VGA-compatible. */
949 if (i >= 0 && i < par->vbe_modes_cnt &&
950 par->vbe_modes[i].mode_attr & VBE_MODE_VGACOMPAT) {
951 for (i = 0; i < count; i++) {
952 outb_p(start + i, dac_reg);
953 outb_p(entries[i].red, dac_val);
954 outb_p(entries[i].green, dac_val);
955 outb_p(entries[i].blue, dac_val);
956 }
957 }
958 #ifdef CONFIG_X86_32
959 else if (par->pmi_setpal) {
960 __asm__ __volatile__(
961 "call *(%%esi)"
962 : /* no return value */
963 : "a" (0x4f09), /* EAX */
964 "b" (0), /* EBX */
965 "c" (count), /* ECX */
966 "d" (start), /* EDX */
967 "D" (entries), /* EDI */
968 "S" (&par->pmi_pal)); /* ESI */
969 }
970 #endif /* CONFIG_X86_32 */
971 else
972 #endif /* CONFIG_X86 */
973 {
974 task = uvesafb_prep();
975 if (!task)
976 return -ENOMEM;
977
978 task->t.regs.eax = 0x4f09;
979 task->t.regs.ebx = 0x0;
980 task->t.regs.ecx = count;
981 task->t.regs.edx = start;
982 task->t.flags = TF_BUF_ESDI;
983 task->t.buf_len = sizeof(struct uvesafb_pal_entry) * count;
984 task->buf = entries;
985
986 err = uvesafb_exec(task);
987 if ((task->t.regs.eax & 0xffff) != 0x004f)
988 err = 1;
989
990 uvesafb_free(task);
991 }
992 return err;
993 }
994
995 static int uvesafb_setcolreg(unsigned regno, unsigned red, unsigned green,
996 unsigned blue, unsigned transp,
997 struct fb_info *info)
998 {
999 struct uvesafb_pal_entry entry;
1000 int shift = 16 - dac_width;
1001 int err = 0;
1002
1003 if (regno >= info->cmap.len)
1004 return -EINVAL;
1005
1006 if (info->var.bits_per_pixel == 8) {
1007 entry.red = red >> shift;
1008 entry.green = green >> shift;
1009 entry.blue = blue >> shift;
1010 entry.pad = 0;
1011
1012 err = uvesafb_setpalette(&entry, 1, regno, info);
1013 } else if (regno < 16) {
1014 switch (info->var.bits_per_pixel) {
1015 case 16:
1016 if (info->var.red.offset == 10) {
1017 /* 1:5:5:5 */
1018 ((u32 *) (info->pseudo_palette))[regno] =
1019 ((red & 0xf800) >> 1) |
1020 ((green & 0xf800) >> 6) |
1021 ((blue & 0xf800) >> 11);
1022 } else {
1023 /* 0:5:6:5 */
1024 ((u32 *) (info->pseudo_palette))[regno] =
1025 ((red & 0xf800) ) |
1026 ((green & 0xfc00) >> 5) |
1027 ((blue & 0xf800) >> 11);
1028 }
1029 break;
1030
1031 case 24:
1032 case 32:
1033 red >>= 8;
1034 green >>= 8;
1035 blue >>= 8;
1036 ((u32 *)(info->pseudo_palette))[regno] =
1037 (red << info->var.red.offset) |
1038 (green << info->var.green.offset) |
1039 (blue << info->var.blue.offset);
1040 break;
1041 }
1042 }
1043 return err;
1044 }
1045
1046 static int uvesafb_setcmap(struct fb_cmap *cmap, struct fb_info *info)
1047 {
1048 struct uvesafb_pal_entry *entries;
1049 int shift = 16 - dac_width;
1050 int i, err = 0;
1051
1052 if (info->var.bits_per_pixel == 8) {
1053 if (cmap->start + cmap->len > info->cmap.start +
1054 info->cmap.len || cmap->start < info->cmap.start)
1055 return -EINVAL;
1056
1057 entries = kmalloc(sizeof(*entries) * cmap->len, GFP_KERNEL);
1058 if (!entries)
1059 return -ENOMEM;
1060
1061 for (i = 0; i < cmap->len; i++) {
1062 entries[i].red = cmap->red[i] >> shift;
1063 entries[i].green = cmap->green[i] >> shift;
1064 entries[i].blue = cmap->blue[i] >> shift;
1065 entries[i].pad = 0;
1066 }
1067 err = uvesafb_setpalette(entries, cmap->len, cmap->start, info);
1068 kfree(entries);
1069 } else {
1070 /*
1071 * For modes with bpp > 8, we only set the pseudo palette in
1072 * the fb_info struct. We rely on uvesafb_setcolreg to do all
1073 * sanity checking.
1074 */
1075 for (i = 0; i < cmap->len; i++) {
1076 err |= uvesafb_setcolreg(cmap->start + i, cmap->red[i],
1077 cmap->green[i], cmap->blue[i],
1078 0, info);
1079 }
1080 }
1081 return err;
1082 }
1083
1084 static int uvesafb_pan_display(struct fb_var_screeninfo *var,
1085 struct fb_info *info)
1086 {
1087 #ifdef CONFIG_X86_32
1088 int offset;
1089 struct uvesafb_par *par = info->par;
1090
1091 offset = (var->yoffset * info->fix.line_length + var->xoffset) / 4;
1092
1093 /*
1094 * It turns out it's not the best idea to do panning via vm86,
1095 * so we only allow it if we have a PMI.
1096 */
1097 if (par->pmi_start) {
1098 __asm__ __volatile__(
1099 "call *(%%edi)"
1100 : /* no return value */
1101 : "a" (0x4f07), /* EAX */
1102 "b" (0), /* EBX */
1103 "c" (offset), /* ECX */
1104 "d" (offset >> 16), /* EDX */
1105 "D" (&par->pmi_start)); /* EDI */
1106 }
1107 #endif
1108 return 0;
1109 }
1110
1111 static int uvesafb_blank(int blank, struct fb_info *info)
1112 {
1113 struct uvesafb_ktask *task;
1114 int err = 1;
1115 #ifdef CONFIG_X86
1116 struct uvesafb_par *par = info->par;
1117
1118 if (par->vbe_ib.capabilities & VBE_CAP_VGACOMPAT) {
1119 int loop = 10000;
1120 u8 seq = 0, crtc17 = 0;
1121
1122 if (blank == FB_BLANK_POWERDOWN) {
1123 seq = 0x20;
1124 crtc17 = 0x00;
1125 err = 0;
1126 } else {
1127 seq = 0x00;
1128 crtc17 = 0x80;
1129 err = (blank == FB_BLANK_UNBLANK) ? 0 : -EINVAL;
1130 }
1131
1132 vga_wseq(NULL, 0x00, 0x01);
1133 seq |= vga_rseq(NULL, 0x01) & ~0x20;
1134 vga_wseq(NULL, 0x00, seq);
1135
1136 crtc17 |= vga_rcrt(NULL, 0x17) & ~0x80;
1137 while (loop--);
1138 vga_wcrt(NULL, 0x17, crtc17);
1139 vga_wseq(NULL, 0x00, 0x03);
1140 } else
1141 #endif /* CONFIG_X86 */
1142 {
1143 task = uvesafb_prep();
1144 if (!task)
1145 return -ENOMEM;
1146
1147 task->t.regs.eax = 0x4f10;
1148 switch (blank) {
1149 case FB_BLANK_UNBLANK:
1150 task->t.regs.ebx = 0x0001;
1151 break;
1152 case FB_BLANK_NORMAL:
1153 task->t.regs.ebx = 0x0101; /* standby */
1154 break;
1155 case FB_BLANK_POWERDOWN:
1156 task->t.regs.ebx = 0x0401; /* powerdown */
1157 break;
1158 default:
1159 goto out;
1160 }
1161
1162 err = uvesafb_exec(task);
1163 if (err || (task->t.regs.eax & 0xffff) != 0x004f)
1164 err = 1;
1165 out: uvesafb_free(task);
1166 }
1167 return err;
1168 }
1169
1170 static int uvesafb_open(struct fb_info *info, int user)
1171 {
1172 struct uvesafb_par *par = info->par;
1173 int cnt = atomic_read(&par->ref_count);
1174
1175 if (!cnt && par->vbe_state_size)
1176 par->vbe_state_orig = uvesafb_vbe_state_save(par);
1177
1178 atomic_inc(&par->ref_count);
1179 return 0;
1180 }
1181
1182 static int uvesafb_release(struct fb_info *info, int user)
1183 {
1184 struct uvesafb_ktask *task = NULL;
1185 struct uvesafb_par *par = info->par;
1186 int cnt = atomic_read(&par->ref_count);
1187
1188 if (!cnt)
1189 return -EINVAL;
1190
1191 if (cnt != 1)
1192 goto out;
1193
1194 task = uvesafb_prep();
1195 if (!task)
1196 goto out;
1197
1198 /* First, try to set the standard 80x25 text mode. */
1199 task->t.regs.eax = 0x0003;
1200 uvesafb_exec(task);
1201
1202 /*
1203 * Now try to restore whatever hardware state we might have
1204 * saved when the fb device was first opened.
1205 */
1206 uvesafb_vbe_state_restore(par, par->vbe_state_orig);
1207 out:
1208 atomic_dec(&par->ref_count);
1209 if (task)
1210 uvesafb_free(task);
1211 return 0;
1212 }
1213
1214 static int uvesafb_set_par(struct fb_info *info)
1215 {
1216 struct uvesafb_par *par = info->par;
1217 struct uvesafb_ktask *task = NULL;
1218 struct vbe_crtc_ib *crtc = NULL;
1219 struct vbe_mode_ib *mode = NULL;
1220 int i, err = 0, depth = info->var.bits_per_pixel;
1221
1222 if (depth > 8 && depth != 32)
1223 depth = info->var.red.length + info->var.green.length +
1224 info->var.blue.length;
1225
1226 i = uvesafb_vbe_find_mode(par, info->var.xres, info->var.yres, depth,
1227 UVESAFB_EXACT_RES | UVESAFB_EXACT_DEPTH);
1228 if (i >= 0)
1229 mode = &par->vbe_modes[i];
1230 else
1231 return -EINVAL;
1232
1233 task = uvesafb_prep();
1234 if (!task)
1235 return -ENOMEM;
1236 setmode:
1237 task->t.regs.eax = 0x4f02;
1238 task->t.regs.ebx = mode->mode_id | 0x4000; /* use LFB */
1239
1240 if (par->vbe_ib.vbe_version >= 0x0300 && !par->nocrtc &&
1241 info->var.pixclock != 0) {
1242 task->t.regs.ebx |= 0x0800; /* use CRTC data */
1243 task->t.flags = TF_BUF_ESDI;
1244 crtc = kzalloc(sizeof(struct vbe_crtc_ib), GFP_KERNEL);
1245 if (!crtc) {
1246 err = -ENOMEM;
1247 goto out;
1248 }
1249 crtc->horiz_start = info->var.xres + info->var.right_margin;
1250 crtc->horiz_end = crtc->horiz_start + info->var.hsync_len;
1251 crtc->horiz_total = crtc->horiz_end + info->var.left_margin;
1252
1253 crtc->vert_start = info->var.yres + info->var.lower_margin;
1254 crtc->vert_end = crtc->vert_start + info->var.vsync_len;
1255 crtc->vert_total = crtc->vert_end + info->var.upper_margin;
1256
1257 crtc->pixel_clock = PICOS2KHZ(info->var.pixclock) * 1000;
1258 crtc->refresh_rate = (u16)(100 * (crtc->pixel_clock /
1259 (crtc->vert_total * crtc->horiz_total)));
1260
1261 if (info->var.vmode & FB_VMODE_DOUBLE)
1262 crtc->flags |= 0x1;
1263 if (info->var.vmode & FB_VMODE_INTERLACED)
1264 crtc->flags |= 0x2;
1265 if (!(info->var.sync & FB_SYNC_HOR_HIGH_ACT))
1266 crtc->flags |= 0x4;
1267 if (!(info->var.sync & FB_SYNC_VERT_HIGH_ACT))
1268 crtc->flags |= 0x8;
1269 memcpy(&par->crtc, crtc, sizeof(*crtc));
1270 } else {
1271 memset(&par->crtc, 0, sizeof(*crtc));
1272 }
1273
1274 task->t.buf_len = sizeof(struct vbe_crtc_ib);
1275 task->buf = &par->crtc;
1276
1277 err = uvesafb_exec(task);
1278 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
1279 /*
1280 * The mode switch might have failed because we tried to
1281 * use our own timings. Try again with the default timings.
1282 */
1283 if (crtc != NULL) {
1284 printk(KERN_WARNING "uvesafb: mode switch failed "
1285 "(eax=0x%x, err=%d). Trying again with "
1286 "default timings.\n", task->t.regs.eax, err);
1287 uvesafb_reset(task);
1288 kfree(crtc);
1289 crtc = NULL;
1290 info->var.pixclock = 0;
1291 goto setmode;
1292 } else {
1293 printk(KERN_ERR "uvesafb: mode switch failed (eax="
1294 "0x%x, err=%d)\n", task->t.regs.eax, err);
1295 err = -EINVAL;
1296 goto out;
1297 }
1298 }
1299 par->mode_idx = i;
1300
1301 /* For 8bpp modes, always try to set the DAC to 8 bits. */
1302 if (par->vbe_ib.capabilities & VBE_CAP_CAN_SWITCH_DAC &&
1303 mode->bits_per_pixel <= 8) {
1304 uvesafb_reset(task);
1305 task->t.regs.eax = 0x4f08;
1306 task->t.regs.ebx = 0x0800;
1307
1308 err = uvesafb_exec(task);
1309 if (err || (task->t.regs.eax & 0xffff) != 0x004f ||
1310 ((task->t.regs.ebx & 0xff00) >> 8) != 8) {
1311 dac_width = 6;
1312 } else {
1313 dac_width = 8;
1314 }
1315 }
1316
1317 info->fix.visual = (info->var.bits_per_pixel == 8) ?
1318 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
1319 info->fix.line_length = mode->bytes_per_scan_line;
1320
1321 out: if (crtc != NULL)
1322 kfree(crtc);
1323 uvesafb_free(task);
1324
1325 return err;
1326 }
1327
1328 static void uvesafb_check_limits(struct fb_var_screeninfo *var,
1329 struct fb_info *info)
1330 {
1331 const struct fb_videomode *mode;
1332 struct uvesafb_par *par = info->par;
1333
1334 /*
1335 * If pixclock is set to 0, then we're using default BIOS timings
1336 * and thus don't have to perform any checks here.
1337 */
1338 if (!var->pixclock)
1339 return;
1340
1341 if (par->vbe_ib.vbe_version < 0x0300) {
1342 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, var, info);
1343 return;
1344 }
1345
1346 if (!fb_validate_mode(var, info))
1347 return;
1348
1349 mode = fb_find_best_mode(var, &info->modelist);
1350 if (mode) {
1351 if (mode->xres == var->xres && mode->yres == var->yres &&
1352 !(mode->vmode & (FB_VMODE_INTERLACED | FB_VMODE_DOUBLE))) {
1353 fb_videomode_to_var(var, mode);
1354 return;
1355 }
1356 }
1357
1358 if (info->monspecs.gtf && !fb_get_mode(FB_MAXTIMINGS, 0, var, info))
1359 return;
1360 /* Use default refresh rate */
1361 var->pixclock = 0;
1362 }
1363
1364 static int uvesafb_check_var(struct fb_var_screeninfo *var,
1365 struct fb_info *info)
1366 {
1367 struct uvesafb_par *par = info->par;
1368 struct vbe_mode_ib *mode = NULL;
1369 int match = -1;
1370 int depth = var->red.length + var->green.length + var->blue.length;
1371
1372 /*
1373 * Various apps will use bits_per_pixel to set the color depth,
1374 * which is theoretically incorrect, but which we'll try to handle
1375 * here.
1376 */
1377 if (depth == 0 || abs(depth - var->bits_per_pixel) >= 8)
1378 depth = var->bits_per_pixel;
1379
1380 match = uvesafb_vbe_find_mode(par, var->xres, var->yres, depth,
1381 UVESAFB_EXACT_RES);
1382 if (match == -1)
1383 return -EINVAL;
1384
1385 mode = &par->vbe_modes[match];
1386 uvesafb_setup_var(var, info, mode);
1387
1388 /*
1389 * Check whether we have remapped enough memory for this mode.
1390 * We might be called at an early stage, when we haven't remapped
1391 * any memory yet, in which case we simply skip the check.
1392 */
1393 if (var->yres * mode->bytes_per_scan_line > info->fix.smem_len
1394 && info->fix.smem_len)
1395 return -EINVAL;
1396
1397 if ((var->vmode & FB_VMODE_DOUBLE) &&
1398 !(par->vbe_modes[match].mode_attr & 0x100))
1399 var->vmode &= ~FB_VMODE_DOUBLE;
1400
1401 if ((var->vmode & FB_VMODE_INTERLACED) &&
1402 !(par->vbe_modes[match].mode_attr & 0x200))
1403 var->vmode &= ~FB_VMODE_INTERLACED;
1404
1405 uvesafb_check_limits(var, info);
1406
1407 var->xres_virtual = var->xres;
1408 var->yres_virtual = (par->ypan) ?
1409 info->fix.smem_len / mode->bytes_per_scan_line :
1410 var->yres;
1411 return 0;
1412 }
1413
1414 static struct fb_ops uvesafb_ops = {
1415 .owner = THIS_MODULE,
1416 .fb_open = uvesafb_open,
1417 .fb_release = uvesafb_release,
1418 .fb_setcolreg = uvesafb_setcolreg,
1419 .fb_setcmap = uvesafb_setcmap,
1420 .fb_pan_display = uvesafb_pan_display,
1421 .fb_blank = uvesafb_blank,
1422 .fb_fillrect = cfb_fillrect,
1423 .fb_copyarea = cfb_copyarea,
1424 .fb_imageblit = cfb_imageblit,
1425 .fb_check_var = uvesafb_check_var,
1426 .fb_set_par = uvesafb_set_par,
1427 };
1428
1429 static void __devinit uvesafb_init_info(struct fb_info *info,
1430 struct vbe_mode_ib *mode)
1431 {
1432 unsigned int size_vmode;
1433 unsigned int size_remap;
1434 unsigned int size_total;
1435 struct uvesafb_par *par = info->par;
1436 int i, h;
1437
1438 info->pseudo_palette = ((u8 *)info->par + sizeof(struct uvesafb_par));
1439 info->fix = uvesafb_fix;
1440 info->fix.ypanstep = par->ypan ? 1 : 0;
1441 info->fix.ywrapstep = (par->ypan > 1) ? 1 : 0;
1442
1443 /* Disable blanking if the user requested so. */
1444 if (!blank)
1445 info->fbops->fb_blank = NULL;
1446
1447 /*
1448 * Find out how much IO memory is required for the mode with
1449 * the highest resolution.
1450 */
1451 size_remap = 0;
1452 for (i = 0; i < par->vbe_modes_cnt; i++) {
1453 h = par->vbe_modes[i].bytes_per_scan_line *
1454 par->vbe_modes[i].y_res;
1455 if (h > size_remap)
1456 size_remap = h;
1457 }
1458 size_remap *= 2;
1459
1460 /*
1461 * size_vmode -- that is the amount of memory needed for the
1462 * used video mode, i.e. the minimum amount of
1463 * memory we need.
1464 */
1465 if (mode != NULL) {
1466 size_vmode = info->var.yres * mode->bytes_per_scan_line;
1467 } else {
1468 size_vmode = info->var.yres * info->var.xres *
1469 ((info->var.bits_per_pixel + 7) >> 3);
1470 }
1471
1472 /*
1473 * size_total -- all video memory we have. Used for mtrr
1474 * entries, resource allocation and bounds
1475 * checking.
1476 */
1477 size_total = par->vbe_ib.total_memory * 65536;
1478 if (vram_total)
1479 size_total = vram_total * 1024 * 1024;
1480 if (size_total < size_vmode)
1481 size_total = size_vmode;
1482
1483 /*
1484 * size_remap -- the amount of video memory we are going to
1485 * use for vesafb. With modern cards it is no
1486 * option to simply use size_total as th
1487 * wastes plenty of kernel address space.
1488 */
1489 if (vram_remap)
1490 size_remap = vram_remap * 1024 * 1024;
1491 if (size_remap < size_vmode)
1492 size_remap = size_vmode;
1493 if (size_remap > size_total)
1494 size_remap = size_total;
1495
1496 info->fix.smem_len = size_remap;
1497 info->fix.smem_start = mode->phys_base_ptr;
1498
1499 /*
1500 * We have to set yres_virtual here because when setup_var() was
1501 * called, smem_len wasn't defined yet.
1502 */
1503 info->var.yres_virtual = info->fix.smem_len /
1504 mode->bytes_per_scan_line;
1505
1506 if (par->ypan && info->var.yres_virtual > info->var.yres) {
1507 printk(KERN_INFO "uvesafb: scrolling: %s "
1508 "using protected mode interface, "
1509 "yres_virtual=%d\n",
1510 (par->ypan > 1) ? "ywrap" : "ypan",
1511 info->var.yres_virtual);
1512 } else {
1513 printk(KERN_INFO "uvesafb: scrolling: redraw\n");
1514 info->var.yres_virtual = info->var.yres;
1515 par->ypan = 0;
1516 }
1517
1518 info->flags = FBINFO_FLAG_DEFAULT |
1519 (par->ypan ? FBINFO_HWACCEL_YPAN : 0);
1520
1521 if (!par->ypan)
1522 info->fbops->fb_pan_display = NULL;
1523 }
1524
1525 static void __devinit uvesafb_init_mtrr(struct fb_info *info)
1526 {
1527 #ifdef CONFIG_MTRR
1528 if (mtrr && !(info->fix.smem_start & (PAGE_SIZE - 1))) {
1529 int temp_size = info->fix.smem_len;
1530 unsigned int type = 0;
1531
1532 switch (mtrr) {
1533 case 1:
1534 type = MTRR_TYPE_UNCACHABLE;
1535 break;
1536 case 2:
1537 type = MTRR_TYPE_WRBACK;
1538 break;
1539 case 3:
1540 type = MTRR_TYPE_WRCOMB;
1541 break;
1542 case 4:
1543 type = MTRR_TYPE_WRTHROUGH;
1544 break;
1545 default:
1546 type = 0;
1547 break;
1548 }
1549
1550 if (type) {
1551 int rc;
1552
1553 /* Find the largest power-of-two */
1554 while (temp_size & (temp_size - 1))
1555 temp_size &= (temp_size - 1);
1556
1557 /* Try and find a power of two to add */
1558 do {
1559 rc = mtrr_add(info->fix.smem_start,
1560 temp_size, type, 1);
1561 temp_size >>= 1;
1562 } while (temp_size >= PAGE_SIZE && rc == -EINVAL);
1563 }
1564 }
1565 #endif /* CONFIG_MTRR */
1566 }
1567
1568
1569 static ssize_t uvesafb_show_vbe_ver(struct device *dev,
1570 struct device_attribute *attr, char *buf)
1571 {
1572 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1573 struct uvesafb_par *par = info->par;
1574
1575 return snprintf(buf, PAGE_SIZE, "%.4x\n", par->vbe_ib.vbe_version);
1576 }
1577
1578 static DEVICE_ATTR(vbe_version, S_IRUGO, uvesafb_show_vbe_ver, NULL);
1579
1580 static ssize_t uvesafb_show_vbe_modes(struct device *dev,
1581 struct device_attribute *attr, char *buf)
1582 {
1583 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1584 struct uvesafb_par *par = info->par;
1585 int ret = 0, i;
1586
1587 for (i = 0; i < par->vbe_modes_cnt && ret < PAGE_SIZE; i++) {
1588 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1589 "%dx%d-%d, 0x%.4x\n",
1590 par->vbe_modes[i].x_res, par->vbe_modes[i].y_res,
1591 par->vbe_modes[i].depth, par->vbe_modes[i].mode_id);
1592 }
1593
1594 return ret;
1595 }
1596
1597 static DEVICE_ATTR(vbe_modes, S_IRUGO, uvesafb_show_vbe_modes, NULL);
1598
1599 static ssize_t uvesafb_show_vendor(struct device *dev,
1600 struct device_attribute *attr, char *buf)
1601 {
1602 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1603 struct uvesafb_par *par = info->par;
1604
1605 if (par->vbe_ib.oem_vendor_name_ptr)
1606 return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
1607 (&par->vbe_ib) + par->vbe_ib.oem_vendor_name_ptr);
1608 else
1609 return 0;
1610 }
1611
1612 static DEVICE_ATTR(oem_vendor, S_IRUGO, uvesafb_show_vendor, NULL);
1613
1614 static ssize_t uvesafb_show_product_name(struct device *dev,
1615 struct device_attribute *attr, char *buf)
1616 {
1617 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1618 struct uvesafb_par *par = info->par;
1619
1620 if (par->vbe_ib.oem_product_name_ptr)
1621 return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
1622 (&par->vbe_ib) + par->vbe_ib.oem_product_name_ptr);
1623 else
1624 return 0;
1625 }
1626
1627 static DEVICE_ATTR(oem_product_name, S_IRUGO, uvesafb_show_product_name, NULL);
1628
1629 static ssize_t uvesafb_show_product_rev(struct device *dev,
1630 struct device_attribute *attr, char *buf)
1631 {
1632 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1633 struct uvesafb_par *par = info->par;
1634
1635 if (par->vbe_ib.oem_product_rev_ptr)
1636 return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
1637 (&par->vbe_ib) + par->vbe_ib.oem_product_rev_ptr);
1638 else
1639 return 0;
1640 }
1641
1642 static DEVICE_ATTR(oem_product_rev, S_IRUGO, uvesafb_show_product_rev, NULL);
1643
1644 static ssize_t uvesafb_show_oem_string(struct device *dev,
1645 struct device_attribute *attr, char *buf)
1646 {
1647 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1648 struct uvesafb_par *par = info->par;
1649
1650 if (par->vbe_ib.oem_string_ptr)
1651 return snprintf(buf, PAGE_SIZE, "%s\n",
1652 (char *)(&par->vbe_ib) + par->vbe_ib.oem_string_ptr);
1653 else
1654 return 0;
1655 }
1656
1657 static DEVICE_ATTR(oem_string, S_IRUGO, uvesafb_show_oem_string, NULL);
1658
1659 static ssize_t uvesafb_show_nocrtc(struct device *dev,
1660 struct device_attribute *attr, char *buf)
1661 {
1662 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1663 struct uvesafb_par *par = info->par;
1664
1665 return snprintf(buf, PAGE_SIZE, "%d\n", par->nocrtc);
1666 }
1667
1668 static ssize_t uvesafb_store_nocrtc(struct device *dev,
1669 struct device_attribute *attr, const char *buf, size_t count)
1670 {
1671 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1672 struct uvesafb_par *par = info->par;
1673
1674 if (count > 0) {
1675 if (buf[0] == '0')
1676 par->nocrtc = 0;
1677 else
1678 par->nocrtc = 1;
1679 }
1680 return count;
1681 }
1682
1683 static DEVICE_ATTR(nocrtc, S_IRUGO | S_IWUSR, uvesafb_show_nocrtc,
1684 uvesafb_store_nocrtc);
1685
1686 static struct attribute *uvesafb_dev_attrs[] = {
1687 &dev_attr_vbe_version.attr,
1688 &dev_attr_vbe_modes.attr,
1689 &dev_attr_oem_vendor.attr,
1690 &dev_attr_oem_product_name.attr,
1691 &dev_attr_oem_product_rev.attr,
1692 &dev_attr_oem_string.attr,
1693 &dev_attr_nocrtc.attr,
1694 NULL,
1695 };
1696
1697 static struct attribute_group uvesafb_dev_attgrp = {
1698 .name = NULL,
1699 .attrs = uvesafb_dev_attrs,
1700 };
1701
1702 static int __devinit uvesafb_probe(struct platform_device *dev)
1703 {
1704 struct fb_info *info;
1705 struct vbe_mode_ib *mode = NULL;
1706 struct uvesafb_par *par;
1707 int err = 0, i;
1708
1709 info = framebuffer_alloc(sizeof(*par) + sizeof(u32) * 256, &dev->dev);
1710 if (!info)
1711 return -ENOMEM;
1712
1713 par = info->par;
1714
1715 err = uvesafb_vbe_init(info);
1716 if (err) {
1717 printk(KERN_ERR "uvesafb: vbe_init() failed with %d\n", err);
1718 goto out;
1719 }
1720
1721 info->fbops = &uvesafb_ops;
1722
1723 i = uvesafb_vbe_init_mode(info);
1724 if (i < 0) {
1725 err = -EINVAL;
1726 goto out;
1727 } else {
1728 mode = &par->vbe_modes[i];
1729 }
1730
1731 if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
1732 err = -ENXIO;
1733 goto out;
1734 }
1735
1736 uvesafb_init_info(info, mode);
1737
1738 if (!request_mem_region(info->fix.smem_start, info->fix.smem_len,
1739 "uvesafb")) {
1740 printk(KERN_ERR "uvesafb: cannot reserve video memory at "
1741 "0x%lx\n", info->fix.smem_start);
1742 err = -EIO;
1743 goto out_mode;
1744 }
1745
1746 info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
1747
1748 if (!info->screen_base) {
1749 printk(KERN_ERR
1750 "uvesafb: abort, cannot ioremap 0x%x bytes of video "
1751 "memory at 0x%lx\n",
1752 info->fix.smem_len, info->fix.smem_start);
1753 err = -EIO;
1754 goto out_mem;
1755 }
1756
1757 if (!request_region(0x3c0, 32, "uvesafb")) {
1758 printk(KERN_ERR "uvesafb: request region 0x3c0-0x3e0 failed\n");
1759 err = -EIO;
1760 goto out_unmap;
1761 }
1762
1763 uvesafb_init_mtrr(info);
1764 platform_set_drvdata(dev, info);
1765
1766 if (register_framebuffer(info) < 0) {
1767 printk(KERN_ERR
1768 "uvesafb: failed to register framebuffer device\n");
1769 err = -EINVAL;
1770 goto out_reg;
1771 }
1772
1773 printk(KERN_INFO "uvesafb: framebuffer at 0x%lx, mapped to 0x%p, "
1774 "using %dk, total %dk\n", info->fix.smem_start,
1775 info->screen_base, info->fix.smem_len/1024,
1776 par->vbe_ib.total_memory * 64);
1777 printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
1778 info->fix.id);
1779
1780 err = sysfs_create_group(&dev->dev.kobj, &uvesafb_dev_attgrp);
1781 if (err != 0)
1782 printk(KERN_WARNING "fb%d: failed to register attributes\n",
1783 info->node);
1784
1785 return 0;
1786
1787 out_reg:
1788 release_region(0x3c0, 32);
1789 out_unmap:
1790 iounmap(info->screen_base);
1791 out_mem:
1792 release_mem_region(info->fix.smem_start, info->fix.smem_len);
1793 out_mode:
1794 if (!list_empty(&info->modelist))
1795 fb_destroy_modelist(&info->modelist);
1796 fb_destroy_modedb(info->monspecs.modedb);
1797 fb_dealloc_cmap(&info->cmap);
1798 out:
1799 if (par->vbe_modes)
1800 kfree(par->vbe_modes);
1801
1802 framebuffer_release(info);
1803 return err;
1804 }
1805
1806 static int uvesafb_remove(struct platform_device *dev)
1807 {
1808 struct fb_info *info = platform_get_drvdata(dev);
1809
1810 if (info) {
1811 struct uvesafb_par *par = info->par;
1812
1813 sysfs_remove_group(&dev->dev.kobj, &uvesafb_dev_attgrp);
1814 unregister_framebuffer(info);
1815 release_region(0x3c0, 32);
1816 iounmap(info->screen_base);
1817 release_mem_region(info->fix.smem_start, info->fix.smem_len);
1818 fb_destroy_modedb(info->monspecs.modedb);
1819 fb_dealloc_cmap(&info->cmap);
1820
1821 if (par) {
1822 if (par->vbe_modes)
1823 kfree(par->vbe_modes);
1824 if (par->vbe_state_orig)
1825 kfree(par->vbe_state_orig);
1826 if (par->vbe_state_saved)
1827 kfree(par->vbe_state_saved);
1828 }
1829
1830 framebuffer_release(info);
1831 }
1832 return 0;
1833 }
1834
1835 static struct platform_driver uvesafb_driver = {
1836 .probe = uvesafb_probe,
1837 .remove = uvesafb_remove,
1838 .driver = {
1839 .name = "uvesafb",
1840 },
1841 };
1842
1843 static struct platform_device *uvesafb_device;
1844
1845 #ifndef MODULE
1846 static int __devinit uvesafb_setup(char *options)
1847 {
1848 char *this_opt;
1849
1850 if (!options || !*options)
1851 return 0;
1852
1853 while ((this_opt = strsep(&options, ",")) != NULL) {
1854 if (!*this_opt) continue;
1855
1856 if (!strcmp(this_opt, "redraw"))
1857 ypan = 0;
1858 else if (!strcmp(this_opt, "ypan"))
1859 ypan = 1;
1860 else if (!strcmp(this_opt, "ywrap"))
1861 ypan = 2;
1862 else if (!strcmp(this_opt, "vgapal"))
1863 pmi_setpal = 0;
1864 else if (!strcmp(this_opt, "pmipal"))
1865 pmi_setpal = 1;
1866 else if (!strncmp(this_opt, "mtrr:", 5))
1867 mtrr = simple_strtoul(this_opt+5, NULL, 0);
1868 else if (!strcmp(this_opt, "nomtrr"))
1869 mtrr = 0;
1870 else if (!strcmp(this_opt, "nocrtc"))
1871 nocrtc = 1;
1872 else if (!strcmp(this_opt, "noedid"))
1873 noedid = 1;
1874 else if (!strcmp(this_opt, "noblank"))
1875 blank = 0;
1876 else if (!strncmp(this_opt, "vtotal:", 7))
1877 vram_total = simple_strtoul(this_opt + 7, NULL, 0);
1878 else if (!strncmp(this_opt, "vremap:", 7))
1879 vram_remap = simple_strtoul(this_opt + 7, NULL, 0);
1880 else if (!strncmp(this_opt, "maxhf:", 6))
1881 maxhf = simple_strtoul(this_opt + 6, NULL, 0);
1882 else if (!strncmp(this_opt, "maxvf:", 6))
1883 maxvf = simple_strtoul(this_opt + 6, NULL, 0);
1884 else if (!strncmp(this_opt, "maxclk:", 7))
1885 maxclk = simple_strtoul(this_opt + 7, NULL, 0);
1886 else if (!strncmp(this_opt, "vbemode:", 8))
1887 vbemode = simple_strtoul(this_opt + 8, NULL, 0);
1888 else if (this_opt[0] >= '0' && this_opt[0] <= '9') {
1889 mode_option = this_opt;
1890 } else {
1891 printk(KERN_WARNING
1892 "uvesafb: unrecognized option %s\n", this_opt);
1893 }
1894 }
1895
1896 return 0;
1897 }
1898 #endif /* !MODULE */
1899
1900 static ssize_t show_v86d(struct device_driver *dev, char *buf)
1901 {
1902 return snprintf(buf, PAGE_SIZE, "%s\n", v86d_path);
1903 }
1904
1905 static ssize_t store_v86d(struct device_driver *dev, const char *buf,
1906 size_t count)
1907 {
1908 strncpy(v86d_path, buf, PATH_MAX);
1909 return count;
1910 }
1911
1912 static DRIVER_ATTR(v86d, S_IRUGO | S_IWUSR, show_v86d, store_v86d);
1913
1914 static int __devinit uvesafb_init(void)
1915 {
1916 int err;
1917
1918 #ifndef MODULE
1919 char *option = NULL;
1920
1921 if (fb_get_options("uvesafb", &option))
1922 return -ENODEV;
1923 uvesafb_setup(option);
1924 #endif
1925 err = cn_add_callback(&uvesafb_cn_id, "uvesafb", uvesafb_cn_callback);
1926 if (err)
1927 return err;
1928
1929 err = platform_driver_register(&uvesafb_driver);
1930
1931 if (!err) {
1932 uvesafb_device = platform_device_alloc("uvesafb", 0);
1933 if (uvesafb_device)
1934 err = platform_device_add(uvesafb_device);
1935 else
1936 err = -ENOMEM;
1937
1938 if (err) {
1939 platform_device_put(uvesafb_device);
1940 platform_driver_unregister(&uvesafb_driver);
1941 cn_del_callback(&uvesafb_cn_id);
1942 return err;
1943 }
1944
1945 err = driver_create_file(&uvesafb_driver.driver,
1946 &driver_attr_v86d);
1947 if (err) {
1948 printk(KERN_WARNING "uvesafb: failed to register "
1949 "attributes\n");
1950 err = 0;
1951 }
1952 }
1953 return err;
1954 }
1955
1956 module_init(uvesafb_init);
1957
1958 static void __devexit uvesafb_exit(void)
1959 {
1960 struct uvesafb_ktask *task;
1961
1962 if (v86d_started) {
1963 task = uvesafb_prep();
1964 if (task) {
1965 task->t.flags = TF_EXIT;
1966 uvesafb_exec(task);
1967 uvesafb_free(task);
1968 }
1969 }
1970
1971 cn_del_callback(&uvesafb_cn_id);
1972 driver_remove_file(&uvesafb_driver.driver, &driver_attr_v86d);
1973 platform_device_unregister(uvesafb_device);
1974 platform_driver_unregister(&uvesafb_driver);
1975 }
1976
1977 module_exit(uvesafb_exit);
1978
1979 #define param_get_scroll NULL
1980 static int param_set_scroll(const char *val, struct kernel_param *kp)
1981 {
1982 ypan = 0;
1983
1984 if (!strcmp(val, "redraw"))
1985 ypan = 0;
1986 else if (!strcmp(val, "ypan"))
1987 ypan = 1;
1988 else if (!strcmp(val, "ywrap"))
1989 ypan = 2;
1990 else
1991 return -EINVAL;
1992
1993 return 0;
1994 }
1995
1996 #define param_check_scroll(name, p) __param_check(name, p, void)
1997
1998 module_param_named(scroll, ypan, scroll, 0);
1999 MODULE_PARM_DESC(scroll,
2000 "Scrolling mode, set to 'redraw', 'ypan', or 'ywrap'");
2001 module_param_named(vgapal, pmi_setpal, invbool, 0);
2002 MODULE_PARM_DESC(vgapal, "Set palette using VGA registers");
2003 module_param_named(pmipal, pmi_setpal, bool, 0);
2004 MODULE_PARM_DESC(pmipal, "Set palette using PMI calls");
2005 module_param(mtrr, uint, 0);
2006 MODULE_PARM_DESC(mtrr,
2007 "Memory Type Range Registers setting. Use 0 to disable.");
2008 module_param(blank, bool, 0);
2009 MODULE_PARM_DESC(blank, "Enable hardware blanking");
2010 module_param(nocrtc, bool, 0);
2011 MODULE_PARM_DESC(nocrtc, "Ignore CRTC timings when setting modes");
2012 module_param(noedid, bool, 0);
2013 MODULE_PARM_DESC(noedid,
2014 "Ignore EDID-provided monitor limits when setting modes");
2015 module_param(vram_remap, uint, 0);
2016 MODULE_PARM_DESC(vram_remap, "Set amount of video memory to be used [MiB]");
2017 module_param(vram_total, uint, 0);
2018 MODULE_PARM_DESC(vram_total, "Set total amount of video memoery [MiB]");
2019 module_param(maxclk, ushort, 0);
2020 MODULE_PARM_DESC(maxclk, "Maximum pixelclock [MHz], overrides EDID data");
2021 module_param(maxhf, ushort, 0);
2022 MODULE_PARM_DESC(maxhf,
2023 "Maximum horizontal frequency [kHz], overrides EDID data");
2024 module_param(maxvf, ushort, 0);
2025 MODULE_PARM_DESC(maxvf,
2026 "Maximum vertical frequency [Hz], overrides EDID data");
2027 module_param(mode_option, charp, 0);
2028 MODULE_PARM_DESC(mode_option,
2029 "Specify initial video mode as \"<xres>x<yres>[-<bpp>][@<refresh>]\"");
2030 module_param(vbemode, ushort, 0);
2031 MODULE_PARM_DESC(vbemode,
2032 "VBE mode number to set, overrides the 'mode' option");
2033 module_param_string(v86d, v86d_path, PATH_MAX, 0660);
2034 MODULE_PARM_DESC(v86d, "Path to the v86d userspace helper.");
2035
2036 MODULE_LICENSE("GPL");
2037 MODULE_AUTHOR("Michal Januszewski <spock@gentoo.org>");
2038 MODULE_DESCRIPTION("Framebuffer driver for VBE2.0+ compliant graphics boards");
2039